Benzene Ring Containing Patents (Class 568/17)
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Patent number: 4507501Abstract: A tertiary phosphine oxide, such as triphenylphosphine oxide, is reduced to the corresponding tertiary phosphine in the presence of a sodium aluminum hydride/aluminum chloride reducing agent.Type: GrantFiled: October 26, 1983Date of Patent: March 26, 1985Assignee: Ethyl CorporationInventor: Gunner E. Nelson
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Patent number: 4503255Abstract: A process for recovering re-usable triarylphosphine (e.g. triphenylphosphine) from rhodium catalyst residues poisoned by the presence of alkyldiarylphosphine (e.g. n-propyldiphenylphosphine) such as are obtained as spent catalyst residues from the hydroformylation of olefins. The process comprises subjecting the poisoned residues to evaporative separation under reduced pressure to separate a vapor comprising triarylphosphine from the rhodium and then mixing the condensed vapor with polar solvent and obtaining the triarylphosphine as a crystalline precipitate from the solvent. The crystalline phosphine is sufficiently free of poisons to be re-usable as a catalyst component in a hydroformylation process.Type: GrantFiled: April 29, 1982Date of Patent: March 5, 1985Assignee: Johnson Matthey Public Limited CompanyInventors: David F. Booker, David E. Grove, Phillip J. Cotterill, Robert G. Tyson
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Patent number: 4497790Abstract: The present invention relates to methods for making cationic radiodiagnostic agents and, in particular, to methods for preparing .sup.99m Tc-labelled cationic radiodiagnostic agents.Type: GrantFiled: September 3, 1982Date of Patent: February 5, 1985Assignee: E. I. du Pont de Nemours and Company, Inc.Inventor: Manuel S. Rodriguez
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Patent number: 4485052Abstract: Phosphonous acids are obtained by hydrolysis of dichlorophosphanes with water at temperatures of about 60.degree. to about 100.degree. C., preferably of about 80.degree. to about 95.degree. C.Type: GrantFiled: November 19, 1982Date of Patent: November 27, 1984Assignee: Hoechst AktiengesellschaftInventors: Hans-Jerg Kleiner, Hubert Neumaier
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Patent number: 4474978Abstract: Process for the preparation of carbamates and/or derivatives thereof by reacting an organic compound containing at least one hydroxyl group with carbon monoxide and an organic nitrogeneous compound in the presence of a catalytic system based on palladium and a ligand according to the general formula: ##STR1## wherein L=N, P, As or Sb; R, R.sup.1, R.sup.2 and R.sup.3 are (un)substituted alkyl, aryl, alkaryl or aralkyl or R and R.sup.1 and/or R.sup.2 and R.sup.3 may form a ring together with the atom L to which they are attached; R.sup.4 and R.sup.5 are H or lower alkyl and n=2, 3 or 4, whereas carbon atoms between the groups L may be part of cyclic or non-cyclic unsaturated structures, and in the presence of an acid promoter.Type: GrantFiled: October 17, 1983Date of Patent: October 2, 1984Assignee: Shell Oil CompanyInventors: Eit Drent, Petrus W. N. M. Van Leeuwen
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Patent number: 4463202Abstract: A method of treating the residue generated in the production of diphenylphosphinous chloride is presented. The method comprises extracting the aluminum content of the residue by contacting the residue with an organic solvent to produce a mixture which when hydrolyzed results in a two-phase solution, the organic phase of which can be incinerated.Type: GrantFiled: August 17, 1982Date of Patent: July 31, 1984Assignee: Stauffer Chemical CompanyInventor: Gershon J. Davis
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Patent number: 4454349Abstract: Fluorinated phosphines having the general formula ##STR1## wherein R.sub.f OR.sub.f -- is a perfluoroalkylether group containing at least one ether linkage are useful as antioxidation additives for perfluorinated fluids.Type: GrantFiled: September 14, 1982Date of Patent: June 12, 1984Assignee: The United States of America as represented by the Secretary of the Air ForceInventors: Christ Tamborski, Carl E. Snyder, Jr., John B. Christian
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Patent number: 4451450Abstract: A normally solid, hydrophilic compound capable of binding with Tc-99m to form a cationic complex is provided. The compound has a formula selected from: ##STR1## wherein: R, R', R", R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5 and R.sup.6 are each independently selected from hydrogen; or substituted or unsubstituted alkyl, alkylene, aryl, alkylaryl, arylalkyl, monocycloalkyl, polycycloalkyl, heterocyclic and carbocyclic groups; and R plus R.sup.i in formula (A) may be taken together to form a cyclic compound;A, A', A", A.sup.1, A.sup.2, A.sup.3, A.sup.4, A.sup.5 and A.sup.6 are independently neutral functional elements, each having a free electron pair available for accepting a proton to provide a charged ligand and having the capability of complexing with Tc-99m to form a cationic complex;Y.sup.1, Y.sup.2, Y.sup.3, Y.sup.4, Y.sup.5 and Y.sup.Type: GrantFiled: October 15, 1981Date of Patent: May 29, 1984Assignee: New England Nuclear CorporationInventor: Vinayakam Subramanyam
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Patent number: 4378277Abstract: Photopolymerizable epoxy compositions which comprise an epoxy-containing material and photosensitive aromatic iondonium salt of a halogen-containing complex ion are described as are coated substrates and methods for bonding materials together using such compositions.Type: GrantFiled: March 10, 1978Date of Patent: March 29, 1983Assignee: Minnesota Mining & Manufacturing CompanyInventor: George H. Smith
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Patent number: 4356324Abstract: The invention is directed to optically active 1,2-bis-(diphenylphosphino)-compounds of the general formula ##STR1## where Ph is a phenyl group and R is a straight or branched chain alkyl group with 2 to 20 carbon atoms or a benzyl group. Especially preferred are compounds in which R is an isopropyl or a benzyl group. These compounds can serve as chiral ligands in noble metal complexes, especially in rhodium complexes, which can be used as catalysts for the homogeneous asymmetrical hydrogenation of pro-chiral unsaturated compounds.Type: GrantFiled: December 31, 1980Date of Patent: October 26, 1982Inventors: Wolfgang Bergstein, Axel Kleemann, Jurgen Martens
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Patent number: 4331818Abstract: The chiral phosphine ligand (R)-1,2-bis(diphenyl-phosphino)-1-cyclohexylethane, when complexed to Rh(I), functions as a superior chiral hydrogenation catalyst. The chiral phosphine ligand is more stereochemically rigid than previous compounds; consequently, virtually optically pure materials can be produced from the chiral hydrogenation of prochiral compounds using the catalyst of this invention. This catalyst is especially useful in the chiral hydrogenation of alpha-acylamido acrylic acids.Type: GrantFiled: March 19, 1980Date of Patent: May 25, 1982Assignee: The Procter & Gamble CompanyInventor: Dennis P. Riley
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Patent number: 4329300Abstract: A method is provided for making certain diaryliodonium salt photoinitiators, based on the initial formation of diaryliodonium perchlorate which is formed from a diaryliodonium bisulfate precursor. The diaryliodonium perchlorate is then reacted with a counter ion source, such as an alkali metal hexafluoro metalloid salt, to produce the desired diaryliodonium salt, which can be used as a photoinitiator. The iodonium salt photoinitiators made by the method of the present invention can be used to effect the cure of a variety of cationically polymerizable organic materials, such as epoxy resins.Type: GrantFiled: June 27, 1980Date of Patent: May 11, 1982Assignee: General Electric CompanyInventors: James V. Crivello, Julia H. Lam
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Patent number: 4313891Abstract: This invention relates to a process for synthesizing compounds of aluminium and alkaline earth metals containing hydride hydrogens and alkoxy radicals, of compositionM[A1H.sub.4-n (OR).sub.n ].sub.2.xBin which 0.5.ltoreq.n.ltoreq.3.5; OR is an alkoxy radical derived from a primary, secondary or tertiary alcohol; R is an aliphatic, cycloaliphatic or aromatic hydrocarbon radical; M is an alkaline earth metal; B is a Lewis base; x can vary between 0 and 4; and R can also contain functional groups OR', SR', NR'.sub.2 ect., consisting of reacting together:(a) a halide of an alkaline earth metal;(b) an alanate of an alkaline earth metal of formula M' A1H.sub.4 (M'.apprxeq.alkaline metal);(c) an alcohol chosen from primary, secondary or tertiary aliphatic, cycloaliphatic or aromatic alcohols containing 1 to 20 carbon atoms.Type: GrantFiled: October 26, 1979Date of Patent: February 2, 1982Assignee: Anic S.p.A.Inventors: Giovanni Dozzi, Salvatore Cucinella
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Patent number: 4306082Abstract: A process for the preparation of pure optically active tertiary phosphines by resolving the corresponding racemic compounds, whereinthe phosphines are first converted to the corresponding phosphine oxides in a conventional manner,the resulting racemic mixtures of the phosphine oxides are reacted in organic solution, in accordance with the principles of enantiomer separation via stereomeric compounds, with an optically pure isomer of a tartaric acid which is mono-acylated or bis-acylated at the alcoholic hydroxyls,the diastereomeric compound which is less soluble in the solvent is separated off,the tartaric acid derivative is split off from the resulting pure diastereomeric compound by means of a base andthe resulting optically pure or substantially optically pure phosphine oxides are reduced back to the phosphines in a conventional manner.Type: GrantFiled: February 27, 1980Date of Patent: December 15, 1981Assignee: BASF AktiengesellschaftInventors: Henri Brunner, Willigis Pieronczyk
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Patent number: 4301301Abstract: Triphenylphosphine is produced in a high degree of yield by bringing pressurized hydrogen into contact with a triphenylphosphine dihalide dissolved in a solvent consisting of at least one member selected from monochlorobenzene and dichlorobenzenes.Type: GrantFiled: April 30, 1980Date of Patent: November 17, 1981Assignee: UBE Industries, Ltd.Inventors: Kiyoshi Fukui, Noboru Kakeya
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Patent number: 4293502Abstract: A new group of nickel ylides is provided that is highly active at relatively low operating temperatures and pressures in the oligomerization of ethylene. The compounds can be defined by the following Formula I: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.5, R.sub.6, R.sub.7 and R.sub.Type: GrantFiled: August 18, 1980Date of Patent: October 6, 1981Assignee: Gulf Research & Development CompanyInventors: David L. Beach, James J. Harrison
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Patent number: 4283304Abstract: Process for removing triorganophosphine from a rhodium containing composition or a rhodium containing concentrate thereof.Type: GrantFiled: December 28, 1979Date of Patent: August 11, 1981Assignee: Union Carbide CorporationInventors: David R. Bryant, Richard A. Galley
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Patent number: 4249023Abstract: A process is disclosed for producing triphenylphosphine in which a triphenylphosphine dichloride-chloroform adduct, obtained by reacting triphenylphosphine oxide with phosgene in chloroform, is reduced with hydrogen. The reduction proceeds in a chloroform solvent or in the absence of a solvent.Type: GrantFiled: May 21, 1979Date of Patent: February 3, 1981Assignee: Hoffmann-La Roche Inc.Inventor: Emil A. Broger
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Patent number: 4246204Abstract: A process is disclosed for producing triphenylphosphine by hydrogenating triphenylphosphine dichloride in an inert solvent in the presence of a platinum, palladium, rhodium, ruthenium and/or iridium catalyst.Type: GrantFiled: May 21, 1979Date of Patent: January 20, 1981Assignee: Hoffmann-La Roche Inc.Inventor: Emil A. Broger
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Patent number: 4212831Abstract: Triphenylphosphine is produced by reacting a phenylalkali with a phosphorus trihalide in a solvent.Type: GrantFiled: March 8, 1979Date of Patent: July 15, 1980Assignee: Ihara Chemical Industry Company, LimitedInventors: Yoshiki Nakayama, Kazushige Hirao, Chihiro Yazawa
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Patent number: 4209468Abstract: Oligomeric or polymeric triaryl- and substituted triarylphosphine compounds which are non-digestible and non-absorbable by animals are disclosed. These compounds act as antioxidants by inhibiting the buildup of hydroperoxides of unsaturated fatty acids, e.g., in foods.Type: GrantFiled: February 21, 1978Date of Patent: June 24, 1980Assignee: The Procter & Gamble CompanyInventor: Joel I. Shulman