| Patent Number |
Title Of Patent |
Date Issued |
| 4766103 |
Preparation of 1,4-dichlorobenzene |
August 23, 1988 |
| 1,2-dichlorobenzene is isomerized to 1,4-dichlorobenzene in the presence of a catalyst comprising (a) at least one of AlCl.sub.3 and AlBr.sub.3 and (b) at least one of iodine, alkaline earth metal halides and sulfates and lanthanide halides. Benzene and/or dichlorobenzene is chlorinated |
| 4727201 |
Preparation of 1,4-dichlorobenzene |
February 23, 1988 |
| 1,2-dichlorobenzene is isomerized to 1,4-dichlorobenzene in the presence of a catalyst comprising (a) at least one of AlCl.sub.3 and AlBr.sub.3 and (b) at least one of iodine, alkaline earth metal halides and sulfates and lanthanide halides. Benzene and/or dichlorobenzene is chlorinated |
| 4716254 |
Preparation of aromatic iodine compounds |
December 29, 1987 |
| Monohalobenzene compounds are iodinated with an iodination reagent selected from the group consisting of (i) iodine monochloride and (ii) I.sub.2 /Cl.sub.2 mixtures having a mol ratio of about 1:3-5:1, in the presence of a catalyst selected from the group consisting of MoCl.sub.5, FeCl.s |
| 4695671 |
Tetramethyltetrahydronaphthalene purification process |
September 22, 1987 |
| An improved process for the removal of by-product amounts of undesirable aromatic hydrocarbon compounds from a mixture comprised of such compounds and predominantly tetramethyltetrahydronaphthalene is provided. In accordance with the process the mixture is contacted with a concentrated |
| 4683033 |
Purification of iodine-containing mixtures and compositions useful therefor |
July 28, 1987 |
| Hydrocarbon solutions containing iodine or iodine-containing impurities are rendered essentially color-free by distillation in the presence of small amounts of a hydrocarbon soluble organometallic compound. |
| 4668835 |
Novel tetracyclic trienes |
May 26, 1987 |
| The alkylation of para-substituted isopropyl benzenes with dipentenes employing an aluminum halide catalyst system produces novel tetracyclic compounds. |
| 4599472 |
Purification of iodine-containing mixtures and compositions useful therefor |
July 8, 1986 |
| Hydrocarbon solutions containing iodine or iodine-containing impurities are rendered essentially color-free by distillation in the presence of small amounts of a hydrocarbon soluble organometallic compound. |
| 4596896 |
Acid catalyzed reactions of monovinyl aromatic compounds |
June 24, 1986 |
| The self condensation of monovinyl aromatic compounds to acyclic dimers, the cross-reaction of monovinyl aromatic compounds with olefins in the presence of acid catalysts to produce cyclialkylated aromatic compounds, and the production of cyclialkylated aromatic compounds by reaction of |
| 4568784 |
Preparation of polymethylbenzenes |
February 4, 1986 |
| A process is provided for preparing polymethylbenzenes by simultaneously contacting (a) a phenolic compound, preferably phenol, with (b) a methylating agent, preferably methanol, in the presence of (c) zinc aluminate as catalyst, under such conditions as will result in the at least p |
| 4551573 |
Alkylation of aromatic compounds |
November 5, 1985 |
| The alkylation of aromatic compounds with olefinic compounds is catalyzed by catalyst consisting essentially of aluminum halide and elemental iodine. |
| 4510337 |
Process for production of 1,1-dimethyl-6-hydroxyindans |
April 9, 1985 |
| In the production of 1,1-dimethyl-6-hydroxyindans through the reaction of phenols with isoprene or 2,3-dimethyl-1,3-butadiene in the presence of phosphoric acid, an improvement is comprised of using a phosphoric acid concentration of about 100% instead of 85% or less and also of the |
| 4480142 |
Catalytic alkylation |
October 30, 1984 |
| The alkylation of aromatic compounds with olefins can be conducted more efficiently in the presence of certain catalysts. |
| 4420431 |
Salts of 3-cyano-3-alkene-sulfinic acids and salts of 3-carbamoyl-3-alkene sulfonic acids and pr |
December 13, 1983 |
| Novel sulfinates and sulfonates are provided comprising salts of 3-cyano-3-alkenesulfinic acids and salts of 3-carbamoyl-3-alkenesulfonic acids and process for preparing these novel compounds. The compounds of the invention are useful as comonomers or termonomers in the preparation o |
| 4334115 |
Process for making tert-butyltoluenes |
June 8, 1982 |
| A process for obtaining at least one tert-butyltoluene comprising reacting isobutylene and isobutane in the presence of hydrogen fluoride and then separating said toluene from the hydrocarbon product. |
| 4258150 |
Alkenylation of monovinyl aromatic polymers |
March 24, 1981 |
| Monovinyl aromatic polymers are modified by reacting with elemental alkali metal and a conjugated diene to produce polymers having branches containing olefinic unsaturation. The olefinically unsaturated branches provide reactive sites which are readily reacted with various substances |
| 4238408 |
Compounds and process |
December 9, 1980 |
| Novel compounds are provided comprising dicyanosulfinates, dicyanosulfonates and dicyanosulfones as well as process of preparing these compounds. These novel compounds are useful in the preparation of monomers for use in polymers, particularly polymers useful in the fibers and textil |
| 4233218 |
Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximides |
November 11, 1980 |
| Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide gives N,N'-substituted-pyromellitdiimides. Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide in the presence of N-substituted maleimides produces N,N'-substituted-3,4,5,6-tetrahydropyromellitdiimide and the Diels-Ald |
| 4225505 |
Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximides and hydrolysis of product to pyromel |
September 30, 1980 |
| Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide gives N,N'-substituted-pyromellitdiimides. Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide in the presence of N-substituted maleimides produces N,N'-substituted-3,4,5,6-tetrahydropyromellitdiimide and the Diels-Ald |
| 4193924 |
Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximides |
March 18, 1980 |
| Pyrolysis of N-substituted-1-cylohexene-1,2-dicarboximide gives N,N'-substituted-pyromellitdiimides. Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide in the presence of N-substituted maleimides produces N,N'-substituted-3,4,5,6-tetrahydropyromellitdiimide and the Diels-Alde |
| 4187231 |
Cyanide-catalyzed isomerization and deuterium exchange with alpha- and beta-sulfolenes |
February 5, 1980 |
| The alpha- and beta-sulfolenes can be converted to a mixture of the two and deuterated in the presence of cyanide ions. |
| 4179580 |
Organic chemical reaction |
December 18, 1979 |
| A process for increasing the reaction rate of condensation reactions which occur between non-conjugated non-aromatic olefinically unsaturated hydrocarbons and active hydrogen-containing organic compounds in the presence of alkali metal comprising carrying out the reaction in the pres |
| 4179472 |
Catalytic alkylation of alkyl-substituted aromatics with monoolefins |
December 18, 1979 |
| A process whereby alkyl substituted aromatics are alkylated with a monoolefin in the presence of an alkali metal catalyst and a promoter composition selected from the group consisting of (1) biphenyl and a conjugated diene, (2) biphenyl, a conjugated diene, and a tertiary amine, and |
| 4179471 |
Catalytic alkylation of alkyl-substituted aromatics with monoolefins |
December 18, 1979 |
| A process whereby alkyl-substituted aromatics are alkylated with a monoolefin in the presence of an alkali metal catalyst and a promoter composition selected from the group consisting of (1) naphthalene, at least one tertiary amine, and at least one tertiary alcohol or alkali metal s |
| 4163014 |
3,4,5,6-Tetrahydropyromellitdiimides |
July 31, 1979 |
| Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide gives N,N'-substituted-pyromellitdiimides. Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide in the presence of N-substituted maleimides produces N,N'-substituted-3,4,5,6-tetrahydropyromellitdiimide and the Diels-Ald |
| 4146552 |
Dehydrogenation of cis-1,2-dicyanocycloalkane |
March 27, 1979 |
| CIS-1,2-Dicyanocycloalkanes are dehydrogenated by reaction with nickel peroxide. |
| 4125536 |
Pyrolysis product of N-substituted-1-cyclohexene-1,2-dicarboximides |
November 14, 1978 |
| Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide gives N,N'-substituted-pyromellitdiimides. Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide in the presence of N-substituted maleimides produces N,N'-substituted-3,4,5,6-tetrahydropyromellitdiimide and the Diels-Ald |
| 4085130 |
Ammonialytic cleavage of lactams to .omega.-aminonitriles |
April 18, 1978 |
| Ammonialytic cleavage of lactams to .omega.-aminonitriles is effectively promoted by the use of catalysts selected from among molecular sieves and alkaine earth silicates. Molecular sieves additionally reduce the formation of undesired polymer. |
| 4080327 |
13-Oxatetracyclo[8.2.1.sup.2,9.0.0.sup.3,8 ]tridec-5-ene-1,5,6,10-tetracarbonitrile and separati |
March 21, 1978 |
| 13-Oxatetracyclo[8.2.1.sup.2,9.0.0.sup.3,8 ]tridec-5-ene-1,5,6,10-tetracarbonitrile; clathrates thereof with monocyclic unsubstituted aromatic compounds; and methods of separating organic admixtures. |
| 4056542 |
Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximides |
November 1, 1977 |
| Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide gives N,N'-substituted-pyromellitdiimides. Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide in the presence of N-substituted maleimides produces N,N'-substituted-3,4,5,6-tetrahydropyromellitdiimide and the Diels-Ald |
| 4048209 |
Isomerization of the cis, trans isomers of 1,2,5,6-tetrasubstituted-1,5-cyclooctadienes to the c |
September 13, 1977 |
| Isomerization of the cis,trans isomers of 1,2,5,6-tetrasubstituted-1,5-cyclooctadienes to the corresponding cis,cis-isomers is carried out by contacting the cis,trans isomers with a halogen promoter in the presence of a suitable solvent in the absence of light. |
| 4039541 |
Monocyclic aromatic clathrates of 13-oxatetracyclo[8.2.1.sup.2,9.0.0.sup.3,8 ]tridec-5-ene-1 |
August 2, 1977 |
| 13-Oxatetracyclo[8.2.1.sup.2,9.0.0.sup.3,8 ]tridec-5-ene-1,5,6,10-tetracarbonitrile; clathrates thereof with monocyclic unsubstituted aromatic compounds; and methods of separating organic admixtures. |
| 3998998 |
Novel copolymers of dicyano-substituted 1,3-dienes |
December 21, 1976 |
| Novel copolymers are produced by polymerizing 2,3-dicyano-substituted 1,3-dienes with at least one monomer copolymerizable therewith selected from conjugated dienes and vinylaromatic compounds. Some of the copolymeric products are elastomeric while others are thermosetting. |
| 3998853 |
13-Oxatetracyclo[8.2.1.sup.2,9.0.0.sup.3,8 ]tridec-5-ene-1,5,6,10-tetracarbonitrile |
December 21, 1976 |
| 13-Oxatetracyclo[8.2.1.sup.2,9.0.0.sup.3,8 ]tridec-5-ene-1,5,6,10-tetracarbonitrile; clathrates thereof with monocyclic unsubstituted aromatic compounds; and methods of separating organic admixtures. |
| 3987056 |
Disproportionation of N-aryl-1,2,3,6-tetrahydrophthalimides |
October 19, 1976 |
| N-Aryl-1,2,3,6-tetrahydrophthalimides are disproportionated to N-arylphthalimides and N-arylhexahydrophthalimides employing a catalyst of palladium, platinum, or ruthenium, on carbon. |
| 3962134 |
Magnesium-aluminum-silicate-phosphate catalysis for ammonialytic cleavage of lactams to form ome |
June 8, 1976 |
| Ammonialytic cleavage of lactams to .omega.-aminonitriles is effectively promoted by the use of compositions of magnesium-aluminum-silicate-phosphate on a substrate as catalysts. |
| 3956356 |
Conversion of lactams to alkenenitriles |
May 11, 1976 |
| A process is provided for the conversion of lactams to the corresponding aminonitriles and alkenenitriles comprising contacting the lactam with ammonia in the presence of a catalyst in a first reaction zone to form the corresponding aminonitrile and a byproduct polymeric material, and |
| 3932457 |
Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximides |
January 13, 1976 |
| Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide gives N,N'-substituted-pyromellitdiimides. Pyrolysis of N-substituted-1-cyclohexene-1,2-dicarboximide in the presence of N-substituted maleimides produces N,N'-substituted-3,4,5,6-tetrahydropyromellitdiimide and the Diels-Ald |
