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| Number | Title | Issue Date |
| 5338606 | Polyester compositions Disclosed are polyester adhesive compositions which exhibit increased melt viscosity and improved adhesion comprised of residues of terephthalic acid, ethylene glycol and diethylene glycol and having reacted therewith or copolymerized therein the residue ... | 08/16/1994 |
| 5319127 | Phenolic-hydrazide compounds and polyolefin compositions stabilized therewith Disclosed are a class of phenolic-hydrazide compounds of diverse structure which are useful as stabilizers for polyolefins. The phenolic-hydrazide compounds inhibit oxidative degradation of polyolefins which is attributable to heat and/or ultraviolet ligh... | 06/07/1994 |
| 5319129 | Preparation of dimethyl cyclohexanedicarboxylates Disclosed is a process for the preparation of a dimethyl cyclohexanedicarboxylate by the hydrogenation of the analogous dimethyl benzenedicarboxylate ester in the presence of a class of palladium on alumina catalysts which have a unique combination of cha... | 06/07/1994 |
| 5315019 | Continuous process for the manufacture of 2,5-dihydrofurans from γ, δ-epoxybutenes Disclosed is a continuous process for the manufacture of 2,5-dihydrofurans by the isomerization of γ,δ-epoxyalkenes in the liquid phase in the presence of a catalyst system comprising an onium iodide compound and a Lewis acid and a process solvent compr... | 05/24/1994 |
| 5312931 | Recovery of 3,4-epoxy-1-butene from 1,3,-butadiene oxidation effluents Disclosed are improved processes for the recovery of 3,4-epoxy-1-butene (EpB) from an epoxidation effluent comprising EpB, butadiene, oxygen and butane obtained by the selective epoxidation of butadiene with an oxygen-containing gas in the presence of a c... | 05/17/1994 |
| 5302744 | Phenolic-hydrazide compounds and polyolefin compositions stabilized therewith Disclosed are a class of phenolic-hydrazide compounds of diverse structure which are useful as stabilizers for polyolefins. The phenolic-hydrazide compounds inhibit oxidative degradation of polyolefins which is attributable to heat and/or ultraviolet ligh... | 04/12/1994 |
| 5300198 | Process for the separation of ethylidene diacetate from acetic anhydride A distillation process for the separation of acetic anhydride from a mixture thereof with ethylidene diacetate wherein the mixture of acetic anhydride and ethylidene diacetate is fed to the mid section of a distillation column and a small amount of acetic... | 04/05/1994 |
| 5292948 | Continuous process for the preparation of acetic anhydride or mixtures of acetic anhydride and acetic acid Disclosed is a continuous process for the preparation of acetic anhydride which comprises carbonylating a mixture comprising (i) methyl iodide and (ii) methyl acetate and/or dimethyl ether in the presence of a rhodium catalyst and a promoter wherein the c... | 03/08/1994 |
| 5288820 | Thermosetting coating compositions Disclosed are thermosetting or curable coating compositions comprising (1) a film forming polymeric material bearing acetoacetate residues, (2) an amino resin cross-linking or curing material, (3) an organic sulfonic acid cross-linking or curing catalyst,... | 02/22/1994 |
| 5288910 | Palladium catalyzed addition of amines to 3,4-epoxy-1-butene 4-amino-2-buten-1-ol is formed by the regioselective addition of primary amines or ammonia to 3,4-epoxy-1-butene. A quantity of a the primary amine or ammonia is reacted with 3,4-epoxy-1-butene in a reaction medium in the presence of a catalyst. The react... | 02/22/1994 |
| 5288912 | Process for the preparation of lithium diarylphosphides and alkylated derivatives thereof Disclosed is a process for the preparation of alkali metal diarylphosphide compounds wherein at least one of the aryl radicals is substituted with an alkyl group. Also disclosed is the preparation of alkyl(diaryl)phosphine compounds which are obtained by ... | 02/22/1994 |
| 5286903 | Process for the preparation of cyclohexanedicarboxylic acids Disclosed are processes for the preparation of cyclohexanedicarboxylic acids by the non-catalytic hydrolysis or acidolysis of dialkyl cyclohexanedicarboxylate esters. The processes provide a means for converting dialkyl cyclohexanedicarboxylate esters to ... | 02/15/1994 |
| 5286898 | Low pressure process for the hydrogenation of dimethyl benzenedicarboxylates to the corresponding dimethyl cyclohexanedicarboxlates Disclosed is a process for the preparation of a dimethyl cyclohexanedicarboxylate by the hydrogenation of the corresponding dimethyl benzenedicarboxylate ester in the presence of a class of a supported catalysts comprising palladium and a second Group VII... | 02/15/1994 |
| 5278339 | Process for the recovery of cyclohexanedicarboxylic acids Disclosed is a process for the recovery of a cyclohexanedicarboxylic acid from an aqueous solution of the cyclohexanedicarboxylic acid and sodium sulfate by contacting the solution with vinylpyridine/divinylbenzene ion exchange resins.... | 01/11/1994 |
| 5264595 | Process for the preparation of 3,4-dihalo-1,2-epoxybutanes from 3,4-epoxy-1-butene Disclosed is a process for the preparation of 3,4-dichloro and 3,4-dibromo-1,2-epoxybutane by the reaction of 3,4-epoxy-1-butene with chlorine or bromine in the presence of a catalytic amount of a tertiary amine or a hydrohalide of a primary, secondary or... | 11/23/1993 |
| 5264087 | Method for refining acetic anhydride by distillation Disclosed is a continuous method for refining acetic anhydride produced by the reaction of ketene and acetic acid by means of a vacuum distillation system to provide a refined material comprised of at least 99.5 weight percent acetic anhydride, not more t... | 11/23/1993 |
| 5258556 | Process for the manufacture of 2,2,4,4-tetramethylcyclobutanediol Disclosed is a novel process for the manufacture of 2,2,4,4 tetramethylcyclobutane 1,3 diol commencing with the pyrolysis of isobutyric anhydride to produce dimethylketene. Dimethylketene is absorbed into 2,2,4,4 tetramethylcyclobutane 1,3 dione which fun... | 11/02/1993 |
| 5254701 | Process for the production of mixtures of 2-hydroxytetrahydrofuran and 4-hydroxybutanal Disclosed is a process for the production of an equilibrium mixture of 2-hydroxytetrahydrofuran and 4-hydroxybutanal by a two-step process comprising (1) heating 2,5-dihydrofuran in the presence of a catalyst system comprising a phosphine, ruthenium or rh... | 10/19/1993 |
| 5254596 | Process for the manufacture of methanol and dimethyl ether Disclosed are chemically-mixed, titanium-zinc oxide catalysts and the use of the catalysts in the manufacture of methanol and dimethyl ether wherein synthesis gas is contacted at elevated temperatures and pressures with the catalyst.... | 10/19/1993 |
| 5250741 | Process for the preparation of 5-alkoxy-2-nitroso phenols Disclosed is a process for the preparation of 5-alkoxy-2-nitrosophenols by the nitrosation of 3-alkoxyphenols using an alkali metal nitrite and an alkanoic acid wherein the selectivity of the nitrosation is improved. Also disclosed is a 2-step process for... | 10/05/1993 |
| 5244545 | Process for removing acetone from carbonylation processes Disclosed is an improved process for the removal of acetone from a production system wherein acetic anhydride is produced by contacting a mixture comprising methyl iodide and methyl acetate and/or dimethyl ether with carbon monoxide in the presence of a c... | 09/14/1993 |
| 5238889 | Process for the separation of oligomeric materials from a catalyst mixture Disclosed is a process for the recovery of catalyst values from mixtures of catalyst compounds and oligomeric materials. The process provides for the separation of (i) an onium iodide compound, (ii) an organotin iodide compound, or (iii) a mixture thereof... | 08/24/1993 |
| 5235118 | Continuous process for the preparation of 2-ethyl-2-(hydroxymethyl)hexanal and 2-butyl-2-ethyl-1, 3-propanediol Disclosed is a continuous process for the manufacture of 2-ethyl-2-(hydroxymethyl)hexanal wherein 2-ethylhexanal, formaldehyde and a tertiary amine are continuously fed to a reaction zone and crude product comprising an aqueous phase and an organic phase ... | 08/10/1993 |
| 5210279 | Process for manufacturing aromatic diacetates A continuous process for the production of diacetate derivatives of aromatic compounds, comprising feeding at any convenient temperature an oxygen-containing gas and feedstock comprising a diisopropyl ring substituted aromatic compound and the recycled mo... | 05/11/1993 |
| 5209827 | Process for the purification of hydroxypivalyl hydroxypivalate Disclosed is a process for the recovery of purified hydroxypivalyl hydroxypivalate (HPHP) from a crude, HPHP containing material containing inorganic catalyst residues and low-boiling and high-boiling (with respect to the boiling point of HPHP) impurities... | 05/11/1993 |
| 5210330 | Process for the preparation of phenylhydroquinone 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 carr... | 05/11/1993 |
| 5194669 | Preparation of alkyl (alkoxycarbonylcyclohexyl) cyclohexenecarboxylates and dialkyl biphenyldicarboxylates Disclosed are processes for the preparation of alkyl (alkoxycarbonylcyclohexyl)cyclohexenecarboxylates by the dimerization of alkyl 3-cyclohexenecarboxylates and the dehydrogenation of the alkyl (alkoxycarbonylcyclohexyl) cyclohexenecarboxylates to dialky... | 03/16/1993 |
| 5189199 | Process for the preparation of 1,4-disubstituted 2-butenes A process is disclosed for the preparation of 1,4-dioxy-2-butenes by reacting 3,4-epoxy-1-butene with an oxygen nucleophile in the presence of a Pd(O) complex catalyst.... | 02/23/1993 |
| 5189088 | Bis(phenolic-amine)quinone compounds and polyolefin compositions stabilized therewith Disclosed is a class of bis(phenolic-amine)quinone compounds which are useful as stablizers for polyolefins. The bis(phenolic-amine)quinone compounds inhibit oxidative degradation of polyolefins which is attributable to heat and/or ultraviolet light and i... | 02/23/1993 |
| 5185476 | Low pressure catalytic hydrogenation of carbonyl-containing compounds and supported catalysts therefor Disclosed are novel catalysts useful for the hydrogenation of carbonyl-containing compounds at mild conditions of temperature and pressure to produce alcohols or amines is disclosed. The catalysts comprise palladium and zinc on a catalyst support material... | 02/09/1993 |
| 5180842 | Purification of quinones Disclosed is a process for removing chlorine-containing impurities from quinone compounds such as p-bezonquinone. The process involves extracting a quinone compound containing 1000 ppm or more chlorine with heptane, cyclohexane or a mixture thereof and se... | 01/19/1993 |
| 5177267 | Continuous process for the recovery of 2 ethylhexanal and a tertiary amine from a mixture comprising 2-ethyl-2-(hydroxymethyl) hexanal, 2-ethylhexanal, tertiary amine and water Disclosed is a continuous process for the manufacture of 2-ethyl-2-(hydroxymethyl)hexanal wherein 2-ethylhexanal, formaldehyde and a tertiary amine are continuously fed to a reaction zone and crude product comprising an aqueous phase and an organic phase ... | 01/05/1993 |
| 5177019 | Method of quantitative analysis of organophosphorus compounds A novel method quantitatively analyzes certain organophosphorus compounds present in mixtures of the organophosphorus compounds, a Group VIII metal and an inert solvent using gas chromatography techniques. The method involves the conversion of a catalytic... | 01/05/1993 |
| 5175362 | Recovery of acetyl values from ethylidene diacetate Disclosed is a process for the recovery of acetyl values from an ethylidene diacetate stream obtained from an acetic anhydride production system. The process comprises hydrolyzing ethylidene diacetate in a liquid phase, hydrolysis zone containing a non-vo... | 12/29/1992 |
| 5169994 | Process for the manufacture of 2,2,4,4-tetramethycyclobutanediol Disclosed is a novel process for the manufacture of 2,2,4,4-tetramethylcyclobutanediol commencing with the pyrolysis of isobutyric anhydride to produce dimethylketene. Dimethylketene is absorbed into certain carboxylate ester solvents which function as th... | 12/08/1992 |
| 5146004 | Continuous process for the preparation of 2-ethyl-2-(hydroxymethyl) hexanal and 2-butyl-2-theyl-1,3-propanediol Disclosed is a continuous process for the manufacture of 2-ethyl-2-(hydroxymethyl)hexanal wherein 2-ethylhexanal, formaldehyde and a tertiary amine are continuously fed to a reaction zone and crude product comprising an aqueous phase and an organic phase ... | 09/08/1992 |
| 5145968 | Selective monoepoxidation of styrene, styrene analogs, and styrene derivatives to the corresponding oxide with molecular oxygen Process is disclosed for the slective monoepoxidation of styrene, styrene analogs, and styrene derivatives. Such compounds are contacted with an oxygen-containing gas in the presence of a promoted, optionally supported silver catalyst under defined reacti... | 09/08/1992 |
| 5144070 | Process for the preparation of -iodocarbonyl compounds Disclosed is a process for the preparation of -iodocarbonyl compounds such as -iodocarboxylic acid anhydrides and -iodoketones by the reaction of a carboxylic anhydride with molecular iodine. Hydrolysis of the -iodocarboxylic a... | 09/01/1992 |
| 5144067 | Process for the coproduction of alkyl iodides and alpha-iodocarboxylic acids and/or anhydrides thereof Disclosed is a process for the coproduction of (1) an alkyl iodide and (2) an -iodocarboxylic acid, a mono--iodocarboxylic anhydride or a mixture thereof which comprises contacting a mixture of an iodine compound and a carboxylic anhydride w... | 09/01/1992 |
| 5138101 | Recovery of high-boiling aldehydes from rhodium-catalyzed hydroformylation processes Disclosed is an extraction process for the recovery of high-boiling aldehydes produced by the rhodium-catalyzed hydroformylation of olefins in the presence of a hydroformylation solvent. The extraction process involves intimately contacting a hydroformyla... | 08/11/1992 |
