Patents Examined by Warren B. Lone
-
Patent number: 5475147Abstract: Isobutane containing a significant amount of isobutylene is treated at conditions effective to oligomerize a predominance of the isobutylene, isobutane substantially free of isobutylene is separated from the oligomer products, and the isobutane substantially free of isobutylene is oxidized to tertiary butyl hydroperoxide.Type: GrantFiled: October 19, 1994Date of Patent: December 12, 1995Assignee: ARCO Chemical Technology, L.P.Inventor: Thomas S. Zak
-
Patent number: 5302767Abstract: Processes are disclosed for preparing [2.2] paracyclophane and derivatives thereof by conducting the Hofmann elimination of p-methylbenzyltrimethylammonium hydroxide, or derivatives thereof, in the presence of an effective amount of oxygen to inhibit the formation of by-product polymers. The oxygen can be introduced, for example, by a purge gas stream containing molecular oxygen. Products produced by the processes are also disclosed.Type: GrantFiled: March 26, 1993Date of Patent: April 12, 1994Assignee: Union Carbide Chemicals & Plastics Technology CorporationInventors: Richard A. Galley, Robert S. Landon, Kenneth C. Senior
-
Patent number: 5210330Abstract: Disclosed is an improved process for the preparation of phenylhydroquinone wherein hydroquinone is first alkylated with cyclohexene to produce cyclohexylhydroquinone which is then dehydrogenated to obtain phenylhydroquinone. The improvement comprises carrying out both the alkylation and dehydrogenation reactions in the presence of a solvent comprising diphenyl ether, biphenyl or a mixture thereof. The solvent possesses selective solubility for hydroquinone and cyclohexylhydroquinone which permits the separation of unreacted hydroquinone from the alkylation reaction product. The boiling point of the solvent also permits the dehydrogenation reaction to be performed at substantially atmospheric pressure.Type: GrantFiled: August 22, 1991Date of Patent: May 11, 1993Assignee: Eastman Kodak CompanyInventors: Dewey W. Fuller, Jr, Bruce L. Gustafson, Bobby L. Bernard
-
Patent number: 5144089Abstract: Solid solutions of magnesium oxide-aluminum oxide related to hydrotalcite and what previously has been referred to as synthetic hydrotalcites, have been prepared with a surface area in excess of 250 m.sup.2 lg, especially at low Mg/Al atom ratios. Such high surface area materials are found to be quite effective in the aldol condensation of aldehydes, and in particular in the conversion of n-butyraldehyde to 2-ethyl-2-hexenal in high yield and with good selectivity in a liquid phase reaction at temperatures under about 200.degree. C.Type: GrantFiled: October 21, 1991Date of Patent: September 1, 1992Assignee: UOPInventors: Blaise J. Arena, Jennifer S. Holmgren
-
Patent number: 5124490Abstract: Acid contaminants leached from acidic ion-exchange resins and carried in process streams with phenol are separated from the phenol by passing the process stream in contact with an anionic exchange resin, whereby the acid contaminants react with and bond to the anionic exchange resin.Type: GrantFiled: June 17, 1991Date of Patent: June 23, 1992Assignee: General Electric CompanyInventor: Michael J. Cipullo
-
Patent number: 5120877Abstract: A process for the production of carbonyl compounds such as acetaldehyde is provided. This process entails reacting alpha olefins with a catalyst system containing a noble metal oxidation catalyst, cupric ions, chloride ions, and a strong acid such as sulfuric acid followed by separating into a carbonyl compound stream and a reduced catalyst stream followed by oxidizing the catalyst stream and returning it to the reaction zone at a pH between about 0 and 2.Type: GrantFiled: January 22, 1991Date of Patent: June 9, 1992Assignee: Eastman Kodak CompanyInventors: Albert T. Fanning, Jr., Harry F. Goss
-
Patent number: 5118877Abstract: In a process for the preparation of mixtures of 2,3-dimethylphenol and 3,4-dimethylphenol a mixture of 2,3-dimethyl-bromobenzene and 3,4-dimethyl-bromobenzene is hydrolized in an aqueous alkaline solution in the presence of a copper compound catalyst of the formula:Cu.sub.(n) R.sub.(m)R represents --O or --OH or a residue of an inorganic or of an organic acid;n is 1 or 2; andm is 0, 1 or 2;the reaction being carried out at a temperature in the range between 200.degree. and 300.degree. C.Type: GrantFiled: January 10, 1991Date of Patent: June 2, 1992Assignee: Bromine Compounds LimitedInventors: Jakob Oren, Michael Zviely, Joshua Hermolin
-
Patent number: 5082974Abstract: 3-Haolgeno-2,3-diphenylacrylaldehyde derivatives represented by the formula ##STR1## wherein R is an alkyl group having 1 to 6 carbon atoms, X and Y each represent a halogen atom, and n is 0, 1, or 2, a process for preparing the derivatives, a medicament for preventing and treating hyperlipidemia containing a pharmacologically effective amount of the derivative, and a method for preventing or treating hyperlipidemia using the medicament.Type: GrantFiled: December 10, 1990Date of Patent: January 21, 1992Assignee: Otsuka Pharaceutical Factory, Inc.Inventors: Kinji Hashimoto, Makoto Inoue, Junichi Minamikawa
-
Patent number: 5081312Abstract: New 4,4,5,8-tetramethyl-1-oxaspiro[2,5]octane. A process for its preparation starting from 2,2,3,6-tetramethyl-1-cyclohexanone is described.4,4,5,8-Tetramethyl-1-oxaspiro[2,5]octane is a useful raw material for the preparation of 2,2,3,6-tetramethyl-cyclohexane-carbaldehyde, a key intermediate for the synthesis of valuable fragrance ingredients.Type: GrantFiled: February 20, 1991Date of Patent: January 14, 1992Assignee: Firmenich SAInventors: Christian Chapuis, Christian Margot, Karl-Heinrich Schulte-Elte, Herve Pamingle
-
Patent number: 4933505Abstract: A method of controlling the diastereoselectivity of the nitroaldol reaction by the use of titanium, zirconium and aluminum based Lewis acids is disclosed. In a preferred embodiment, the reaction of lithium nitronate anion with aldehydes in THF/CH.sub.2 Cl.sub.2 at reduced temperature in the presence of isopropoxy titanium trichloride (TiCl.sub.3 (OPr.sup.i)) yields nitro alcohols enriched in the erythro diastereomer. Erythro-threo ratios of 11.2:1-3.4:1 for aromatic aldehydes and 3.8:1-1:1 for aliphatic aldehydes are typically obtained.Type: GrantFiled: August 5, 1988Date of Patent: June 12, 1990Assignee: Northwestern UniversityInventors: Anthony G. M. Barrett, Christopher D. Spilling
-
Patent number: 4929765Abstract: Phenylacetaldehydes of the general formula I ##STR1## where R.sup.1 to R.sup.5 are each independently of the others hydrogen, alkyl, alkoxy, halogen, haloalkyl, haloalkoxy or haloalkylthio, by catalytic rearrangement in the presence of a zeolite, are prepared by reacting an epoxy of the formula II or a phenylglycol of the formula III ##STR2## where Y and Z can be identical to or different from each other and are each hydroxyl, alkoxy, aryloxy or acyloxy, in the gas phase over a borosilicate zeolite catalyst at from 70.degree. to 200.degree. C. under reduced pressure.Type: GrantFiled: November 22, 1988Date of Patent: May 29, 1990Assignee: BASF AktiengesellschaftInventors: Hubert Smuda, Wolfgang Hoelderich, Norbert Goetz, Hans-Gert Recker
-
Patent number: 4927954Abstract: A continuous process for efficiently co-producing secondary alcohols of long-chain olefins and lower carboxylic acid esters, comprising (I) performing an acid/olefin reaction in the presence of a heterogeneous catalyst such as Amberlyst 15, and (II) performing an ester-exchange reaction in the presence of, e.g., titanium alcoholate. A desirable feature of the process is the ability to produce co-products of choice.Type: GrantFiled: April 19, 1989Date of Patent: May 22, 1990Assignee: Union Carbide Chemicals and Plastics Company, Inc.Inventors: Robert J. Knopf, Louis F. Theiling Jr., Leroy P. Berti
-
Patent number: 4898999Abstract: A process for the preparation of cyclobutenohaloarenes is described in which a cyclobutenoarene such as benzocyclobutene is reacted with a halogen in the organic phase of a two-phase organic/aqueous system to form a cyclobutenohaloarene and hydrogen halide, the latter which migrates into the aqueous phase. The process has the advantages of low acidity of the reaction phase, and the consequent reduced side halogenation product formation and necessity for the introduction of caustic in the recovery step, and relatively simple recovery of the cyclobutenohaloarene from the reaction mixture.Type: GrantFiled: June 3, 1988Date of Patent: February 6, 1990Assignee: Shell Oil CompanyInventor: Larry S. Corley
-
Patent number: 4876397Abstract: A method is disclosed for the synthesis of phenol and acetone by decomposition over a heterogeneous catalyst comprising a fluorine-containing acidic compound on an inert support. The method allows for quantitative conversions with yields of up to >99 mole %.Type: GrantFiled: October 24, 1988Date of Patent: October 24, 1989Assignee: Texaco Chemical CompanyInventors: John F. Knifton, Neal J. Grice
-
Patent number: 4873383Abstract: A selective isolation of m-dichlorobenzene is carried out at a high efficiency by bringing an isomeric mixture containing m- and o- and/or p-dichlorobenzenes into contact with an absorbing material comprising a TPZ-3 type zeolite consisting of at least one aluminosilicate compound of the formula (I):M.sub.2/n O.multidot.Al.sub.2 O.sub.3 .multidot..sub.x SiO.sub.2 .multidot..sub.m H.sub.2 O (I)wherein M = a mono or di-valent cation, for example, H.sup.+, Li.sup.+ or Na.sup.+, n=1 or 2, x=10 or more, and m=0 or 1 or more, to selectively absorb dichlorobenzene by the absorbing material, and then, by collecting the non-absorbed fraction of the isomeric mixture.Type: GrantFiled: January 29, 1988Date of Patent: October 10, 1989Assignee: Hodogaya Chemical Co., Ltd.Inventors: Toshitaka Kaneshiki, Osamu Narukawa, Tadayoshi Haneda, Toshiyuki Endo
-
Patent number: 4867915Abstract: Sixteen carbon atom carboxylic acids having 16-phenoxy or 16-phenylthio substituents, and 0, 1, or 4 triple bonds, methods of preparing them, and pharmaceutical preparations containing them. These compounds are useful as lipoxygenase inhibitors.Type: GrantFiled: May 21, 1986Date of Patent: September 19, 1989Assignee: Syntex (U.S.A.) Inc.Inventors: Joseph M. Muchwoski, Angel Guzman
-
Patent number: 4851583Abstract: This invention relates to the generation of acrolein from an acetal of acrolein via exposure to a sulfonic acid reusable catalytic material. The acrolein acetals have the following general structures; ##STR1## where R may or may not be equal to R' R/R' is an alkyl group having from 1 to 6 carbons; and ##STR2## where R is a cyclic diol derived from ethylene glycol, propylene glycol, butylene glycol, pentylene glycol, hexylene glycol, glycerol hexoses or polyaccharides.Type: GrantFiled: January 4, 1988Date of Patent: July 25, 1989Assignee: Betz Laboratories, Inc.Inventors: Edmund Bockowski, Cato R. McDaniel
-
Patent number: 4847438Abstract: A compound of formula I ##STR1## in which formula: D represents hydrogen or a cyano group;X represents halogen;A represents an alkyl group (typically a C.sub.1 -C.sub.6 alkyl group);n is 0 to 4;RCOO. represents a residue of an acid RCO.sub.2 H, which acid, or an ester-forming derivative of which acid, on reaction with .alpha.-cyano-3-phenoxybenzyl alcohol or an ester-forming derivative thereof, give rise to an .alpha.-cyano-3-phenoxybenzyl ester having pesticidal properties.Type: GrantFiled: April 13, 1987Date of Patent: July 11, 1989Assignee: National Research Development CorporationInventors: Michael Elliott, Norman F. Janes, Richard L. Elliott
-
Patent number: 4845267Abstract: Alkyl esters of 2-fluoro-1-methoxyethylcarbamic acid, which are useful intermediates in the preparation of compounds, such as 4-amino-5- fluoropentanoic acid, are prepared by the electrochemical anodic oxidation of esters of 2-fluoroethylcarbamic acid in the presence of methanol and an electrolyte.Type: GrantFiled: February 11, 1988Date of Patent: July 4, 1989Assignee: The Dow Chemical CompanyInventors: James M. Renga, Charles K. Bon, Aylin H. Gulkenkian, Michael G. Smith
-
Patent number: 4835323Abstract: New hydroquinones have the formula: ##STR1## wherein p is 1 or 2 and q is 0 or 1, provided that p+q is 1 or 2; R is a residue of formula: ##STR2## wherein Q is (i) -OX or (ii) -PO(OR.sub.11)((O).sub.x R.sub.11); and salts thereof with organic or inorganic acid bases.The groups X and R.sub.11 and x are defined hereinafter.The compounds of formula I are useful as stabilisers in photographic materials.Type: GrantFiled: September 11, 1986Date of Patent: May 30, 1989Assignee: Ciba-Geigy AGInventor: Frederick H. Howell