Isopropylidene Diphenol Produced Patents (Class 568/728)
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Patent number: 5446212Abstract: A reduced methyl bromide process for making tetrabromobisphenol A in methanol, including: dissolving bisphenol-A in a methanol solvent to form a bisphenol-A methanol solution, adding bromine to the bisphenol-A methanol solution to brominate bisphenol-A and form tetrabromobisphenol A and hydrogen bromide, exposing the bisphenol-A methanol solution to an amount of a hydrogen peroxide agent to reduce the amount of methyl bromide co-product resulting from the bromination of bisphenol-A in methanol by reducing the amount of hydrogen bromide co-product available to react with the methanol, and collecting the resulting tetrabromobisphenol A product thus formed after the bromination is substantially complete.Type: GrantFiled: September 8, 1994Date of Patent: August 29, 1995Assignee: Great Lakes Chemical Corp.Inventors: Dave C. Sanders, Arthur G. Mack, Larry D. Timberlake
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Patent number: 5434316Abstract: Bisphenol-A produced by the condensation of acetone and phenol is freed of contaminant co-products by melting and crystallization in and from water. The final washing, in hot water, cleanses the crystal surfaces of remaining contaminants without the need for organic solvents.Type: GrantFiled: July 28, 1994Date of Patent: July 18, 1995Assignee: General Electric CompanyInventor: Gaylord M. Kissinger
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Patent number: 5428075Abstract: A method is provided for regenerating deactivated sulfonated aromatic organic ion-exchange resin beds, such as a polystyrene ion-exchange resin bed, having chemically combined amino organo mercaptan groups with anhydrous phenol at an elevated temperature.Type: GrantFiled: May 2, 1994Date of Patent: June 27, 1995Assignee: General Electric CompanyInventors: Eric J. Pressman, Sheldon J. Shafer
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Patent number: 5414151Abstract: A method is provided for making bisphenol by condensing a ketone and a phenol in the presence of a sulfonated aromatic organic polymeric ion-exchange catalyst having aminoorganomercaptan groups using a phenol having less than 1 ppm of hydroxyacetone.Type: GrantFiled: May 2, 1994Date of Patent: May 9, 1995Assignee: General Electric CompanyInventors: Eric J. Pressman, Sheldon J. Shafer
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Patent number: 5414152Abstract: The addition of 3-mercaptopropionic acid or the organic ester thereof to the reaction mixture slows the rate of deactivation of cationic catalyst resins containing mercaptan promoter sites, during preparation of bisphenols by the condensation of a ketone with a phenol.Type: GrantFiled: May 10, 1994Date of Patent: May 9, 1995Assignee: General Electric CompanyInventor: Michael J. Cipullo
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Patent number: 5399784Abstract: A high quality bisphenol A with a high purity and an excellent hue is produced from a crystalline adduct of bisphenol A and phenol by washing the adduct with specifically purified phenol, followed by decomposition of the washed adduct to separate bisphenol A. The purification is performed by a method including contacting raw material phenol with a strong-acid ion exchange resin to obtain treated phenol, and distilling the treated phenol.Type: GrantFiled: September 23, 1993Date of Patent: March 21, 1995Assignee: Chiyoda CorporationInventors: Sachio Asaoka, Noriyuki Yoneda, Kouji Sakashita, Tetsuo Maejima, Makoto Yasui, Akio Shindo
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Patent number: 5395857Abstract: The invention relates to a process for increasing (improving) the volume/time yield of fixed-bed reactors in the production of bisphenol A.Type: GrantFiled: March 31, 1994Date of Patent: March 7, 1995Assignee: Bayer AktiengesellschaftInventors: Klaus Berg, Georg Malamet, Alfred Eitel, Claus Wulff
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Patent number: 5336813Abstract: A process comprising the addition of a degradation inhibiting effective amount of an amine having a boiling point above that of the phenol used in the process to a composition comprising the said phenol and a bisphenol, the addition occurring prior to a procedure which subjects the bisphenol to substantial heat, said bisphenol produced from an acidic ion exchange resin catalyzed reaction of the said phenol and a ketone or aldehyde.Type: GrantFiled: January 29, 1993Date of Patent: August 9, 1994Assignee: General Electric CompanyInventors: Michael J. Cipullo, John W. Fulmer
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Patent number: 5324867Abstract: High quality bisphenol A is produced from a neutral crystalline adduct of bisphenol A and phenol by fusing the adduct in an atmosphere having a maximum oxygen content of 0.005% by volume, followed by evaporation of liberated phenol. The crystalline adduct may be mixed with an aliphatic carboxylic acid before the fusion to reduce the coloring of the product. When an acidic crystalline adduct is used, the use of a strong alkali salt of an aliphatic carboxylic acid is suitably used. Interior surfaces of the apparatuses for carrying out the fusion and evaporation are desirably washed with an organic solvent to remove oxygen therefrom. The evaporation of phenol is suitably performed by two stage steam stripping wherein a used stripping gas obtained in the second stage is employed as a stripping gas in the first stage while steam is used as the stripping gas in the second stage.Type: GrantFiled: July 13, 1992Date of Patent: June 28, 1994Assignee: Chiyoda CorporationInventors: Sachio Asaoka, Tetsuo Maejima, Kouji Sakashita, Noriyuki Yoneda, Makoto Yasui, Nobuhiro Onda, Tsuneo Watanabe, Nobuo Moriya, Akio Shindo, Hiroaki Nishijima, Athumi Kukidome, Ryuichi Inaba, Takashi Imazeki, Kaoru Shimogawara
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Patent number: 5315042Abstract: Product quality productivity of continuous bisphenol-A (BPA) are increased by increasing the flow rate of reactants through the reactor and decreasing % acetone conversion in the presence of an ion exchange resin catalyst and an optional free mercaptan promoter.Type: GrantFiled: March 22, 1993Date of Patent: May 24, 1994Assignee: General Electric CompanyInventors: Michael J. Cipullo, Gaylord M. Kissinger, Isabel M. Matos
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Patent number: 5302774Abstract: The invention relates to a process for the production of bisphenols from acetone and phenols in the presence of sulfonic acid ion exchanger resins modified with alkyl-SH groups, in which 0.6 to 5% by weight H.sub.2 O is added to the mixture of phenol and acetone before the reaction.Type: GrantFiled: August 9, 1993Date of Patent: April 12, 1994Assignee: Bayer AktiengesellschaftInventors: Klaus Berg, Hans-Josef Buysch, Alfred Eitel, Gerhard Fennhoff, Otto Immel, Ralf Pakull, Bernhard Wehrle, Claus Wulff
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Patent number: 5248839Abstract: A preparation process of high purity bisphenol A from phenol and acetone with a continuous or batch type reactor by on-line estimating with a computer the composition of the reaction mixture and saturated dissolving temperature of bisphenol A under the reaction conditions and by automatically controlling the reaction conditions and liquid transfer conditions of the reaction mixture to the next step. The process does not form crystals of bisphenol A-phenol adduct in the reactor and cooler. A maximum rate of reaction can be obtained. Consequently, fluctuation of reaction temperature can be prevented and the amount of impurities formed is small. The discharge operation of the reaction mixture from the reactor can be carried out steadily and with ease, and does not disturb the operation of successive steps.Type: GrantFiled: April 7, 1992Date of Patent: September 28, 1993Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Shigeru Iimuro, Akira Yamada, Kenichi Ohmura, Toshio Houri, Tsuguo Kawamura
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Patent number: 5237112Abstract: This invention relates to a process for preparing tetrabromobisphenol-A in high yield and high purity comprising: (a) forming a reaction solvent from at least one non-polar solvent and an amount of aqueous hydrogen peroxide; (b) charging an amount of alkylidenediphenol to the reaction solvent to form a reaction mass; (c) feeding an amount of bromine to the reaction mass at a temperature and for a period of time sufficient to tetra-brominate substantially all of the alkylidenediphenol thus charged; (d) maintaining during step (c) the amount of hydrogen peroxide less than an amount required to convert substantially all of the HBr which forms to elemental bromine; and (e) heat treating the formed product whereby a product having less than about 20 ppm ionic impurities is produced.Type: GrantFiled: August 31, 1992Date of Patent: August 17, 1993Assignee: Ethyl CorporationInventor: David E. LaRose
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Patent number: 5212206Abstract: This invention relates to a catalyst modified with mercapto amines, its preparation and its use for the preparation of bisphenols.Type: GrantFiled: February 8, 1990Date of Patent: May 18, 1993Assignee: Bayer AktiengesellschaftInventors: Udo Rudolph, Norbert Bachem, Claus Wulff
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Patent number: 5210328Abstract: This invention relates to a process for the preparation of substituted cycloalkylidene bisphenols from phenols and special cycloalkanones in the presence of acid condensation catalysts and in the presence of water.Type: GrantFiled: June 25, 1992Date of Patent: May 11, 1993Assignee: Bayer AktiengesellschaftInventors: Dieter Freitag, Claus H. Wulff, Alfred Eitel, Helmut Waldmann, Uwe Westeppe, Manfred Hajek, Klaus D. Berg, Bernd Griehsel, Carl Casser
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Patent number: 5198591Abstract: The invention relates to a process for obtaining a high purity bisphenol from a post-reaction mixture resulting from the step of synthesis of phenol and acetone in the presence of a strong acid cation exhanger catalyst, by the way of crystallation and separation by distillation followed by recovery of bisphenol-A from the step of thermal catalytic decomposition of by product of the principal process technology in a multistage process.Type: GrantFiled: November 22, 1991Date of Patent: March 30, 1993Assignees: Instytut Ciezkiej Syntezy Organicznej "Blachownia", Zaklady Chemiczne "Blachownia", ABB Lummus Crest Inc.Inventors: Maciej Kiedik, Jozef Kolt, Jerzy Marszycki, Eugeniusz Zajac, Teodor Bek, Zbigniew Swiderski, Anna Rzodeczko, Jerzy Mroz, Janina Olkowska
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Patent number: 5169992Abstract: Disclosed is a one step method for synthesis of bisphenol A which comprises reacting phenol with acetone in the presence of a catalyst comprising an acidic montmorillonite clay having the structure:M.sub.x/n.sup.n+ .multidot.yH.sub.2 O(Al.sub.4-x Mg.sub.x) (Si.sub.8) O.sub.20 (OH).sub.4where M represent the interlamellar, balancing cation (normally sodium or lithium), and x, y and n are integers, wherein the acidic clay has been pretreated with an acid and optionally has deposited thereon an acid selected from the group consisting hydrogen fluoride, a fluorosulfonic acid or a mineral acid, at a temperature of from 20.degree. C. to 200.degree. C. and a pressure of from near atmospheric to about 1000 psi.Type: GrantFiled: April 20, 1992Date of Patent: December 8, 1992Assignee: Texaco Chemical CompanyInventor: John F. Knifton
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Patent number: 5146007Abstract: In the preparation of bisphenol-A by condensation of phenol with acetone in the presence of an acidic ion-exchange resin catalyst, pretreatment of the catalyst to render it anhydrous comprises two steps to minimize resin degradation. In the first step, from 25 to 90 percent by weight of the resin associated water is removed by vaporization, and in the second step dehydration is completed by saturating the partially dehydrated catalyst with phenol. The advantage of the improvement in the process resides in a more efficient drying, requiring less time and minimal degradation of the resin structure.Type: GrantFiled: June 17, 1991Date of Patent: September 8, 1992Assignee: General Electric CompanyInventor: Michael J. Cipullo
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Patent number: 5110994Abstract: The invention concerns a process for synthesizing 9,9-bis(hydroxyphenyl)fluorene by reacting fluorene with excess phenol using a liquid catalyst prepared by dissolving aluminum trichloride in an anhydrous organic solvent such as toluene evincing the property of an electron donor while hydrochloric-acid gas is being supplied. For the purpose of the synthesis, the fluorenone is dissolved for instance at 60.degree. C. in the liquid phenol and then the liquid catalyst is dripped into the agitated reaction mixture at such a rate that the temperature of the reaction mixture is kept below 60.degree. C. Following catalyst addition and subsequent after-reaction interval of several hours, the raw product is mixed with hot water and the excess phenol is removed by steam distillation. After signle-washing with water, the raw product is dissolved in hot acetone, allowed to crystallize, is filtered out and dried in vacuum. Lastly the raw product is recrystallized from 1,2-dichloroethane to form the pure product.Type: GrantFiled: December 10, 1990Date of Patent: May 5, 1992Assignee: ISONOVA Technische Innovationen G.m.b.HInventor: Peter Fialla
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Patent number: 5107036Abstract: A curing agent for an epoxy resin comprising (A) a polyhydric phenol obtainable by condensing a phenol compound and a hydroxybenzaldehyde and (B) a dihydric phenol, which gives a cured material of an epoxy resin having improved moisture and heat resistance and a small coefficient of linear thermal expansion.Type: GrantFiled: October 24, 1990Date of Patent: April 21, 1992Assignee: Sumitomo Chemical Company, LimitedInventors: Nobuyuki Nakajima, Shuichi Kanagawa, Hideshi Sakamoto, Noriaki Saito, Tadashi Ikushima
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Patent number: 5105027Abstract: Bisphenol A is prepared by condensing a stoichiometric excess of phenol with acetone in the presence of (a) a catalytically effective amount of an acid catalyst, e.g., benzenesulfonic acid, and (b) a co-catalytically effective amount of a functional polymer characteristically having the formula: ##STR1## in which m is 0 or 1, n is 0 or 1, p is 0 or 1, R.sup.1, R.sup.2 and R.sup.3, which may be identical or different, are each a hydrogen atom, a C.sub.1 -C.sub.6 alkyl radical or a phenyl radical optionally substituted by 1 or 2 hydroxyl or C.sub.1 -C.sub.4 alkoxy groups, and R.sup.4 is a hydrogen atom, a halogen atom, a C.sub.1 -C.sub.6 alkyl radical, or one of the groups: --CHO, --NO.sub.2, --CO.sub.2 H, --CO.sub.2 R.sup.5 wherein R.sup.5 is a C.sub.1 -C.sub.4 alkyl radical, or ##STR2## is the residue of a chloromethylated resin.Type: GrantFiled: February 28, 1991Date of Patent: April 14, 1992Assignee: Rhone-Poulenc ChimieInventors: Jean-Roger Desmurs, Francis Pierre
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Patent number: 5105026Abstract: The present disclosure is directed to improving purity of a bisphenol product in a bisphenol by-product isomerization process wherein isomers of bisphenol are isomerized to the desired bisphenol product. During the isomerization, acidic resin fines elute from the acidic ion exchange resin catalyst into the reaction effluent. These resin fines can be filtered effectively and without contamination by a bed of solid particles such as alumina or carbon. The removal of resin fines improves the product quality and yield by eliminating resin particulates and reducing acid catalyzed cracking of bisphenols during purification and finishing steps.Type: GrantFiled: November 15, 1990Date of Patent: April 14, 1992Assignee: Shell Oil CompanyInventors: Joseph B. Powell, Christopher W. Uzelmeier
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Patent number: 5087767Abstract: A method for preparing 2,2-bis(4-hydroxyphenyl)propane comprises reacting acetone and phenol in the presence of an acidic ion-exchange resin as a catalyst wherein the reaction of acetone and phenol is performed while removing a part of the water generated during the reaction from a mixed solution containing acetone and phenol by a pervaporation method. According to the method, the water generated through the reaction can rapidly be removed simultaneously with or alternatively to the reaction by a pervaporation operation and, therefore, the catalytic activity of the ion-exchange resin is not impaired at all. Moreover, any complicated operations associated with the dehydration are not required. Thus, the acidic ion-exchange resin catalyst can continuously be used over a long time period without any treatment for the regeneration thereof. Further, according to the method, bisphenol A can be economically prepared from acetone and phenol in a high conversion rate and high yield.Type: GrantFiled: December 20, 1990Date of Patent: February 11, 1992Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Kenichi Okamoto, Hidetoshi Kita, Yasuo Tanaka, Shigeru Iimuro
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Patent number: 5075511Abstract: Bisphenol-A is prepared by reacting an excess of phenol with acetone in the presence of a modified sulfonic acid cationic exchange resin catalyst having a plurality of sulfonic acid sites of the general formula ##STR1## in which IER represents the ionic exchange resin backbone, each a and b is an integer from 0 to about 5, and each R is selected independently from H, OH, SH and alkyl groups. The catalyst exhibits high activity and selectivity at moderate reaction temperatures, low production of colored impurities, and high stability.Type: GrantFiled: June 19, 1990Date of Patent: December 24, 1991Assignee: Shell Oil CompanyInventor: Simon M. Li
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Patent number: 5068463Abstract: A process for the production of tetrabromo-4,4'-alkylidenediphenols, especially tetrabromobisphenol A (TBBA), from the corresponding alkylidenediphenols by oxidative bromination with Br.sub.2, HBr.sub.3 or HBr and aqueous hydrogen peroxide in the presence of an organic solvent. The process is characterized by washing the organic phase containing dissolved tetrabromo-4,4'-alkylidenediphenol with an aqeuous alkali sulphite solution, preferably at 50.degree. to 90.degree. C. Through this washing treatment, the tetrabromo compound is obtained in higher purity; in addition, the mother liquor can be recycled without difficulty.Type: GrantFiled: October 5, 1990Date of Patent: November 26, 1991Inventor: Eberhard Walter
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Patent number: 5008470Abstract: The present disclosure is directed to acid scavenging in the acid-catalyzed preparation of a bisphenol by condensation of a phenolic compound and a carbonyl compound. During the preparation, strong acids leach from the acidic ion exchange resin catalyst into the reaction effluent. These acids can be scavenged effectively and without contamination by an inorganic oxide before purification of the product. The acid scavenging improves the product quality and yield by reducing acid catalyzed cracking of bisphenols during purification and finishing steps.Type: GrantFiled: November 30, 1989Date of Patent: April 16, 1991Assignee: Shell Oil CompanyInventors: Joseph B. Powell, Christopher W. Uzelmeier
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Patent number: 5001281Abstract: Bis-phenols are isomerized in the presence of an acidic perfluorinated polymer catalyst.Type: GrantFiled: August 11, 1989Date of Patent: March 19, 1991Assignee: Shell Oil CompanyInventor: Simon M. Li
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Patent number: 4996373Abstract: The invention relates to a process for producing dihydroxydiarylalkanes from carbonyl compounds and phenols under high pressure.Type: GrantFiled: October 10, 1989Date of Patent: February 26, 1991Assignee: Bayer AktiengesellschaftInventors: Ludwig Bottenbruch, Heinrich Ruppert, Neil S. Isaacs, Kenneth G. Latham
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Patent number: 4960956Abstract: Ring-arylcyclobutenealkylated di(hydroxyphenyl) compounds having at least one arylcyclobutenealkyl moiety attached to at least one of the phenyl rings self-cure upon heating to produce rigid, relatively insoluble resins of the thermoset type.Type: GrantFiled: May 9, 1989Date of Patent: October 2, 1990Assignee: Shell Oil CompanyInventor: Pui-Kwan Wong
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Patent number: 4954661Abstract: A method for preparing high-purity bisphenol A which comprises a principal process comprising a first reaction step for reacting phenol with acetone, a first concentration adjusting step, a first crystallization step for precipitating crystals of the adduct of bisphenol A with phenol, a first separation step for separating a solution containing the crystals of the adduct into the crystals and the mother liquor and a phenol removing step for removing phenol from the crystals of the adduct; and a sub-process comprising a second reaction step for reacting p-isopropenylphenol with phenol, a second concentration adjusting step, a second crystallization step, a second separation step for separating a solution containing the second any crystals of the adduct into the second any crystals and the second mother liquor and a cleaving step, the first mother liquor from the principal process being fed to the sub-process and the second any crystals of the adduct from the sub-process being fed to the principal process, is hType: GrantFiled: March 9, 1989Date of Patent: September 4, 1990Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Shigeru Iimuro, Yoshio Morimoto, Takashi Kitamura
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Patent number: 4946877Abstract: In a process for producing bisphenol A by reacting phenol and acetone in the presence of hydrochloric acid as a catalyst, the improvement comprising adding the water-containing phenol separated from the reaction product mixture in the purification stage to the reaction mixture containing phenol and acetone, in such an amount that the water content in the reaction mixture is within the range of 1 to 5 wt%, said water-containing phenol being obtained from the dehydrochlorination step of the reaction product mixture, condensing the distilled off gases and liquid-separating of the condensates.Type: GrantFiled: February 7, 1989Date of Patent: August 7, 1990Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Shigeru Imuro, Yoshio Morimoto, Takashi Kitamura
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Patent number: 4942265Abstract: The process for preparing 2,2-bis(4-hydroxyphenyl)propane (bisphenol A) by reacting acetone with phenol and decomposing the resultant adduct of bisphenol A and phenol is well known. However, the quality of bisphenol A thus obtained is not always satisfactory.In the process of this invention, the adduct is washed with phenol recovered by decomposing an adduct of bisphenol A and phenol, and then bisphenol A is prepared by decomposing the washed adduct.The bisphenol A prepared by the process of this invention has an extremely high quality and is suitable for the preparation of polycarbonate used for optical parts.Type: GrantFiled: November 28, 1988Date of Patent: July 17, 1990Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Shigeru Iimuro, Takashi Kitamura, Yoshio Morimoto
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Patent number: 4935553Abstract: A process for preparing high purity bisphenol A comprising feeding continuously phenol and acetone in the presence of a hydrochloric acid catalyst into a first stage reactor and reacting phenol and acetone in the range of 20-60 mol % of acetone conversion and continuously removing the first reaction product from the first stage reactor. The first reaction product is fed into a second stage reactor and the reaction of phenol and acetone is completed to obtain a second reaction product from which bisphenol A is recovered.Type: GrantFiled: January 6, 1989Date of Patent: June 19, 1990Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Shigeru Iimuro, Yoshio Morimoto, Takashi Kitamura
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Patent number: 4931594Abstract: A method for making aromatic bisphenols such as 9,9-bis-(4-hydroxyphenyl)fluorene by reacting an aromatic ketone, for example a diaryl ketone or diaryl diketone, with a phenol in the present of an insoluble strongly acidic cationic ion exchange resin as an acidic condensation catalyst, which latter may be used in the presence of a co-catalyst containing sulfur.Type: GrantFiled: October 26, 1988Date of Patent: June 5, 1990Assignee: Rohm GmbHInventors: Joachim Knebel, Volker Kerscher, Werner Ude
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Patent number: 4895988Abstract: The mutual condensation of aromatic and carbonylic compounds is carried out with zeolitic materials derived from silicalite by replacing a portion of silicon with B and Al, Al and Ti, Ti and Fe, and with ZSM-5, to yield diaryl-alkanes.Type: GrantFiled: October 20, 1987Date of Patent: January 23, 1990Assignees: Eniricerche S.p.A., Enichem Sythesis S.p.A., Snamprogetti S.p.A.Inventors: Mario G. Clerici, Giuseppe Bellussi
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Patent number: 4876395Abstract: A process which comprises(a) contacting an excess of a phenol with a ketone in the presence of an acidic ion exchange resin catalyst;(b) recovering thereafter a stream from an acidic ion exchange resin catalyst, said stream including the dihydric phenol, unreacted phenol, isomers of the desired dihydric phenol and acid impurities derived from the acidic ion exchange resin catalyst;(c) removing a major portion of the desired dihydric phenol from the stream of (b);(d) adding to the dihydric phenol effective quantities of a Group II-a metal or transition metal of oxidation number +2 carbonate to color stablize the dihydric phenol;(e) recovering the solid dihydric phenol and the metal carbonate.Type: GrantFiled: July 11, 1988Date of Patent: October 24, 1989Assignee: General Electric CompanyInventor: Gaylord M. Kissinger
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Patent number: 4859803Abstract: A process for the preparation of bisphenols which comprises treating a phenol with a ketone in the presence of a cation exchange resin catalyst and a mercaptan co-catalyst in a reactor or a series of reactors wherein all of the phenol and a portion of the mercaptan is injected into the beginning of the reactor or the first reactor and the remaining mercaptan is injected along the reactor length or in the subsequent reactors whereby cyclic dimers formation is reduced.Type: GrantFiled: May 16, 1988Date of Patent: August 22, 1989Assignee: Shell Oil CompanyInventor: Paul V. Shaw
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Patent number: 4847432Abstract: A method for treating a sulfonic acid-containing ion exchange resin to remove destabilizing impurities therefrom is disclosed. The method comprises contacting the resin with a base, followed by contact with a strong acid. The treated ion exchange resin is particularly suitable for use as a catalyst in the preparation of bisphenol A.Type: GrantFiled: December 28, 1987Date of Patent: July 11, 1989Assignee: General Electric CompanyInventor: Gary R. Faler
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Patent number: 4825010Abstract: By-products of bis-phenol synthesis are isomerized in the presence of a mercapto modified cation exchange resin catalyst.Type: GrantFiled: October 19, 1987Date of Patent: April 25, 1989Assignee: Shell Oil CompanyInventor: Simon M. Li
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Patent number: 4822923Abstract: By-products of bis-phenol synthesis are isomerized in the presence of an acid catalyst and a free mercaptan co-catalyst.Type: GrantFiled: October 19, 1987Date of Patent: April 18, 1989Assignee: Shell Oil CompanyInventor: Simon M. Li
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Patent number: 4820740Abstract: Bisphenol-A is prepared by reacting an excess of phenol with acetone in the presence of a modified sulfonic acid cationic exchange resin catalyst having a plurality of sulfonic acid sites of the general formula ##STR1## in which IER represnts the ionic exchange backbone, each a and b is an integer from 9 to about 5, and each R is selected independently from H, OH, Sh and alkyl groups. The catalyst exhibits high activity and selectively at moderate reaction temperatures, low production of colored impurities, and high stability.Type: GrantFiled: October 30, 1986Date of Patent: April 11, 1989Assignee: Shell Oil CompanyInventor: Simon M. Li
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Patent number: 4777301Abstract: An aldehyde or ketone is condensed with an aromatic compound by contacting the aldehyde or ketone and the aromatic compound with a non-zeolitic molecular sieve, which has in its calcined form an adsorption of isobutane of at least about 2 percent by weight of the non-zeolitic molecular sieve at a partial pressure of 500 torr and a temperature of 20.degree. C. Among the condensations which can be effected is the condensation of acetone with phenol to produce bisphenol A.Type: GrantFiled: June 25, 1986Date of Patent: October 11, 1988Assignee: Union Carbide CorporationInventor: Kurt D. Olson
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Patent number: 4766255Abstract: A process for the preparation of gem-bis(hydroxyaryl)alkanes which comprises the reaction of a ketone, a hydroxyarene and an alkylhalosilane.Type: GrantFiled: June 29, 1987Date of Patent: August 23, 1988Assignee: Xerox CorporationInventors: Beng S. Ong, Lupu Alexandru
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Patent number: 4683345Abstract: Process of preparation of a bisphenol by the condensation of a phenol carrying a halogen substituent and alkyl groups with an aldehyde in a solvent for the phenol, in the presence of sulphuric acid; the proportion of acid with respect to the phenol is such that after the condensation and absorption by the acid of the water eliminated, the acid contains less than 50% of water by weight.Type: GrantFiled: April 16, 1986Date of Patent: July 28, 1987Assignee: Colette NouvelInventor: Guy Lejeune
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Patent number: 4675458Abstract: A method for making 9,9-bis-(4-hydroxyphenyl)-fluorene by reacting fluorenone with phenol at a temperature from 20.degree. to 100.degree. C. in the presence of sulfuric acid of a concentration higher than 70 percent and of a mercaptan, and particularly beta-mercaptopropionic acid, as acidic condensing agents.Type: GrantFiled: October 3, 1985Date of Patent: June 23, 1987Assignee: Ronm GmbHInventors: Achim Riemann, Werner Ude
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Patent number: 4590303Abstract: A method of making bisphenol A from phenol and acetone is provided which allows for the use of reactor acetone feed in the rearrangement reactor. As a result, improved acetone conversion is realized and BPA productivity is enhanced.Type: GrantFiled: June 3, 1985Date of Patent: May 20, 1986Assignee: General Electric CompanyInventor: Ashok K. Mendiratta
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Patent number: 4584416Abstract: A sulfonated aromatic organic polymer, such as sulfonated polystyrene ion-exchange resin is provided having ionically bound N-alkylaminoorganomercaptan groups. The ion-exchange resin can be used to effect phenol-ketone condensation.Type: GrantFiled: November 14, 1983Date of Patent: April 22, 1986Assignee: General Electric CompanyInventors: Eric J. Pressman, Paul R. Willey
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Patent number: 4535191Abstract: Novel polycarbonates are provided which exhibit rubbery and elastomeric properties which are the polymerized reaction products of:(i) a carbonate precursor; and(ii) at least one dihydric phenol represented by the general formula ##STR1## wherein R is selected from straight chain alkyl radicals containing from 8 to about 30 carbon atoms;each R.sup.1 is independently selected from halogen monovalent hydrocarbon, and monovalent hydrocarbonoxy radicals;each R.sup.2 is independently selected from halogen, monovalent hydrocarbon, and monovalent hydrocarbonoxy radicals; andn and n' are independently selected from whole numbers having a value of from 0 to 4 inclusive.Type: GrantFiled: February 23, 1984Date of Patent: August 13, 1985Assignee: General Electric CompanyInventors: Victor Mark, Charles V. Hedges
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Patent number: 4517387Abstract: A process for continuously producing 2,2-bis(4-hydroxyphenyl) propane having a high quality from a reaction of phenol and acetone in the presence of a hydrochloric acid containing catalyst comprising the steps of:(A) carrying out the reaction by continuously charging additional phenol, the below-mentioned circulating phenol, additional acetone, additional hydrogen chloride or hydrochloric acid, the below-mentioned circulating oily mother liquor, and the below-mentioned aqueous mother liquid into a reactor to form a reaction mixture slurry comprising the crude phenol adduct of 2,2-bis(4-hydroxyphenyl) propane in the form of crystal and two liquid phase reaction mother liquors of an oily mother liquor and an aqueous mother liquor;(B) separating the reaction mixture slurry into the crude phenol adduct of 2,2-bis(4-hydroxyphenyl) propane and the two liquid phase mother liquors after discharging the reaction mixture slurry from the reactor;(C) separating the two liquid phase mother liquors obtained in the above-meType: GrantFiled: September 26, 1983Date of Patent: May 14, 1985Assignees: Mitsui Petrochemical Industries, Ltd., Honshu Chemical Ind. Co. Ltd.Inventors: Fujihisa Matsunaga, Tadahiko Nishimura, Etsuo Miyake, Kiyotaka Banba
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Patent number: 4451675Abstract: The invention is a process for preparing alkylidenebis(dibromophenol) comprising(a) dissolving alkylidenediphenol in between about 17 and 25 moles of methanol for each mole of alkylidenediphenol wherein the methanol has less than 5 percent by weight of water therein;(b) adding to the solution between about 4.0 and 4.1 moles of bromine per mole of alkylidenediphenol at an elevated temperature;(c) adding water to precipitate the alkylidenebis(dibromophenol) remaining in solution after the addition of the bromine in step (b) is completed; and(d) separating the alkylidenebis(dibromophenol) from the methanol solution.Type: GrantFiled: July 16, 1982Date of Patent: May 29, 1984Assignee: The Dow Chemical CompanyInventor: Charles T. Bounds