|
Match
|
Document |
Document Title |
|
|
7501045 |
Method of producing and separating dinitrile compounds
The present invention relates to a process for the manufacture and separation of dinitrile compounds. It relates more particularly to a process for the manufacture and separation of dinitrile...
|
|
|
6599398 |
Recovery of adiponitrile from a mixture of adiponitrile, aminocapronitrile and hexamethylenediamine
Process for the recovery of a purified adiponitrile (ADN) from a mixture of adiponitrile, aminocapronitrile and hexamethylenediamine, utilizing two sequential distillations: (1) a first...
|
|
|
6559333 |
Method for purifying aliphatic aminonitriles
The present invention relates to a process for the purification of aliphatic aminonitriles and more particularly of 6-aminocapronitrile. It consists more specifically in subjecting...
|
|
|
6153784 |
Removal of halides from halide-containing nitrile mixtures
Halides are removed from halide-containing nitrile mixtures by (a) thermally treating the halide-containing nitrile mixture, (b) subsequently adding a base to the thermally treated nitrile...
|
|
|
5961788 |
Sequential distillation process for removing tetrahydroazepine from aminocapronitrile and/or hexamethylenediamine
A process for removing tetrahydroazepine from aminocapronitrile or hexamethylenediamine by sequential distillation in which the overhead from the second distillation is combined with a fresh,...
|
|
|
5395974 |
Lewis acid catalyzed ammonolysis of nylon
The present invention relates to a method of reacting polyamides or mixtures thereof with ammonia to obtain a mixture of monomers. The reaction is carried out in the presence of certain Lewis Acid...
|
|
|
5312959 |
Purification of 2-methylglutaronitrile or adiponitrile
2-methylglutaronitrile and adiponitrile are purified by removal of boron residues by adding an alcohol or amino alcohol and then recovering the nitrile by distillation.
|
|
|
5302756 |
Ammonolysis of nylon
Useful monomeric products are obtained in the reaction of nylon 6,6 with ammonia. Increased yield of monomer products from nylon 6,6 is obtained from ammonolysis when a mixture with nylon 6 is...
|
|
|
5192399 |
Purification of aminonitriles or diamines
Separation of an aliphatic aminonitrile or an aliphatic diamine from a mixture containing the corresponding cyclic, aliphatic, mono-unsaturated amine by adding caustic compound to the mixture and...
|
|
|
5162567 |
Purification of 6-aminocapronitrile
Purification of 6-aminocapronitrile by heating a mixture containing same and THA and converting the THA to higher boiling compounds, and then distilling the 6-aminocapronitrile. The time required...
|
|
|
4416824 |
Recovery of triarylboranes by forming boron-containing metal compounds
A process for recovery of normally soluble triarylboranes in organonitriles by forming novel boron containing metal compounds, e.g., bis(triphenylborane-isocyano-N)-bis(adiponitrile)nickel (II).
|
|
|
4147717 |
Process for purifying adiponitrile
Certain basic impurities, e.g., N-heterocyclic amines such as 2-methyl-4-amino-5,6-trimethylene pyrimidine are removed from adiponitrile by contact with solid acidic sorption agents, e.g., weak...
|
|
|
3983011 |
Removal of chloride impurities from an adiponitrile feed by distillation in the presence of a high boiling amine
Process for the purification of adiponitrile containing chloride impurities by contacting said adiponitrile with a high boiling amine and recovering the purified adiponitrile containing lower...
|
|
|
3950229 |
Purification of adiponitrile
Adiponitrile is separated from impurities of boiling point close to that of adiponitrile, especially 5-cyanovaleric acid and 2-cyanocyclopenten-(1)-ylamine, by reacting the impurities with a...
|
|
|
3879436 |
Treatment of adiponitrile
A process for the removal of 2-cyanocylopentylideneimine and adipimide from crude adiponitrile synthesized from ammonia and adipic acid and comprising the steps of (a) treating the crude...
|
|
|
3859329 |
PURIFICATION PROCESS
Adiponitrile containing 2-cyanocyclopenten-(1)-ylamine as impurity is treated with aqueous formaldehyde and, without prior separation of formaldehyde or its reaction products, the total mixture is...
|
|
|
3855269 |
APPARATUS AND METHOD FOR SEPARATING TETRAALKYLAMMONIUM SALT
Apparatus and method for separating tetraalkylammonium salt from a first stream comprising water, adiponitrile, dissolved tetraalkylammonium salts, and unconverted acrylonitrile by lowering the...
|
|
|
3853947 |
PURIFYING 1,4-DICYANOBUTENES
Recovery of pure 1,4-dicyanobutenes from 1,4-dicyanobutenes containing halogen, particularly chlorine or bromine, by treatment with a hexamethylenediamine or with dihexamethylenetriamine in the...
|
|
|
3853754 |
MEMBRANE SEPARATION OF HOMOGENEOUS CATALYSTS FROM NITRILE SOLUTIONS
Asymmetric aromatic polyamide and aromatic polyimide membranes are used in the reverse osmosis separation of a metalorgano complex catalyst from an organic solution containing a mixture of such...
|
|
|
3819491 |
SEPARATING ADIPONITRILE FROM MIXTURES
2-Cyanocyclopenten-(1)-ylamine, an impurity in adiponitrile is removed from it by heating the mixture under pressure with water substantially free from dissolved inorganic matter to hydrolyse the...
|
|
|
3775258 |
PURIFICATION OF ADIPONITRILE
A process is provided for hydrolyzing 2-cyanocyclopentylideneimine (CPI) to 2-cyanocyclopentanone by contacting the CPI with an acidic catalyst and water at a temperature of at least 140° C....
|
|
|
3758545 |
PURIFICATION OF ADIPONITRILE
A process for the purification of adiponitrile wherein adiponitrile containing impurities is treated with a polymer of formaldehyde, such as paraformaldehyde, containing from about six to about one...
|
|
|
3725459 |
PROCESS FOR PURIFYING ADIPONITRILE
A process for purifying crude adiponitrile which comprises contacting crude liquid adiponitrile with oxygen or a gas containing molecular oxygen at a temperature of from 120° to 300°C. to thereby...
|
|
|
3711078 |
PROCESS FOR THE TREATMENT OF THE CRUDE MIXTURE RESULTING FROM THE PREPARATION OF AN ADIPONITRILE BY DIMERIZATION
A portion of the crude reaction mixture which is obtained by dimerization of a nitrile with an alkali or alkaline earth metal amalgam is continuously withdrawn. The withdrawn portion is separated...
|
|
|
3616269 |
METHOD FOR THE PURIFICATION OF MALONONITRILE BY THE ADDITION OF CYCLOPENTADIENE FOLLOWED BY DISTILLATION
Malononitrile containing similarly boiling unsaturated dinitrile impurities is contacted with cyclopentadiene to result in the selective conversion of said impurities to substantially higher...
|
|
|
3549685 |
PROCESS FOR THE HYDRODIMERISATION OF ALPHA,BETA-MONO-OLEFINIC NITRILES AND ESTERS OF ALPHA,BETA-MONO-OLEFINIC CARBOXYLIC ACIDS
|
|
|
3542845 |
AMALGAM PROCESS FOR PRODUCING ADIPONITRILE FROM ACRYLONITRILE
|
|
|
3523967 |
PROCESS OF PURIFICATION
|
|
|
3496212 |
PROCESS FOR PURIFYING ADIPONITRILE
|
|
|
3479386 |
PROCESS FOR THE REDUCTIVE DIMERISATION OF ALPHA,BETA-OLEFINIC NITRILES
|
|
|
3451900 |
ADIPONITRILE RECOVERY BY MULTISTAGE VACUUM DISTILLATION
|
|
|
3429783 |
PROCESS FOR UPGRADING AN ACRYLONITRILE ELECTROHYDRODIMERIZATION EFFLUENT CONTAINING ADIPONITRILE BY DISTILLATION AND ALKALINE TREATMENT
|
|
|
3370082 |
Purification of adipodinitrile
|
|
|
3350281 |
Process for separating adiponitrile from reaction mixture by stripping with ammonia
|
|
|
3313726 |
Process for regenerating ion exchange resins
|
|
|
3267131 |
Product separation and recovery in adiponitrile manufacture
|
|
|
3223724 |
Purification of aliphatic dinitriles
|
|
|
3152186 |
Process for the production of hexamethylenediamine
|
|
|
3048635 |
Process for the production of hexamethylene diamine
|
|
|
2920099 |
Purification of aliphatic nitriles
|
|
|
2841537 |
Purification of dinitriles
|
|
|
2803643 |
Purification of dinitriles
|
|
|
3647855 |
Title is not available
|
|
|
3660258 |
Title is not available
|
|
|
3655721 |
Title is not available
|
|
|
3817841 |
Title is not available
|
|
|
3579581 |
Title is not available
|
|
|
3839408 |
Title is not available
|
|
|
3803206 |
Title is not available
|
|
|
3597331 |
Title is not available
|