Abstract:
Catalytic processes for preparing caprolactam, pipecolinic acid, and their derivatives, from lysine or alpha-amino-epsilon-caprolactam starting materials, and products produced thereby. A process for preparing caprolactam or a derivative thereof, the process comprising contacting a reactant comprising lysine or alpha aminocaprolactam with a catalyst and a gas comprising hydrogen gas, in the presence of a solvent. The catalyst may be provided on a support material, such as a transition metal.
Abstract:
Lactams, in particular ε-caprolactam, are produced by the hydrolytic cyclization of aminonitriles, in particular 6-aminocapronitrile, in the vapor phase in a plurality of adiabatic fixed bed reaction zones arranged in succession wherein at least a portion of the heat of the exothermic reaction is removed between each of the successive reaction zones. Conducting the reaction in such a manner requires less capital for the reactor itself. It has also been found that the product exiting such a reaction system can be directly fed to a distillation unit without the need of additional cooling or storing.
Abstract:
In various embodiments, the present invention can involve a method of synthesizing α-amino-ε -caprolactam. The method can comprise heating a salt of L-lysine in a solvent comprising an alcohol. In other embodiments, the present invention can involve methods for synthesizing ε-caprolactam. The methods can comprise heating a salt of L-lysine in a solvent comprising an alcohol and deaminating the reaction product. In various embodiments, the invention can include methods of converting biomass into nylon 6. The methods can comprise heating L-lysine in a solvent comprising an alcohol to produce α-amino -ε caprolactam, deaminating to produce ε-caprolactam and polymerizing into nylon 6, wherein the L-lysine is derived from the biomass. In other embodiments, the present invention can include methods of making nylon 6. The methods can comprise synthesizing ε-caprolactam and then polymerizing, wherein the ε-caprolactam is derived from L-lysine.
Abstract:
Bidentate ligand of formula (I), R R M -R-M R R wherein M and M each indenpendently represent P, As or Sb; R , R , R and R each independently represent the same or a different optionally substituted organic group and at least one of R , R , R and R contains a tertiary carbon atom through which the group is linked to M or M ; and R represents a bridging group based on a trimethylene group connecting M and M of which the middle carbon atom is double bonded to a non-metal element chosen from group 14, 15 or 16 of the periodic table of elements. Catalyst comprising this bidentate ligand and carbonylation process n which this catalyst is used.
Abstract translation:式(I)的二齿配体,R 1 R 2 M 1 -R M 2 R 3,其中M 1和M 2各自独立地表示P,As或 锑; R 1,R 2,R 3和R 4各自独立地表示相同或不同的任选取代的有机基团,并且R 1,R 2,R 3, 并且R 4含有叔碳原子,该基团通过该叔碳原子与M 1或M 2连接; 并且R表示基于连接M 1和M 2的三亚甲基的桥连基团,其中中碳原子与选自元素周期表第14,15或16族的非金属元素双键键合 。 包含该二齿配体和使用该催化剂的羰基化方法n的催化剂。
Abstract:
Bidentate ligand of formula (I), R R M -R-M R R wherein M and M each indenpendently represent P, As or Sb; R , R , R and R each independently represent the same or a different optionally substituted organic group and at least one of R , R , R and R contains a tertiary carbon atom through which the group is linked to M or M ; and R represents a bridging group based on a trimethylene group connecting M and M of which the middle carbon atom is double bonded to a non-metal element chosen from group 14, 15 or 16 of the periodic table of elements. Catalyst comprising this bidentate ligand and carbonylation process n which this catalyst is used.
Abstract translation:式(I)的二齿配体,R 1 R 2 M 1 -R M 2 R 3,其中M 1和M 2各自独立地表示P,As或 锑; R 1,R 2,R 3和R 4各自独立地表示相同或不同的任选取代的有机基团,并且R 1,R 2,R 3, 并且R 4含有叔碳原子,该基团通过该叔碳原子与M 1或M 2连接; 并且R表示基于连接M 1和M 2的三亚甲基的桥连基团,其中中碳原子与选自元素周期表第14,15或16族的非金属元素双键键合 。 包含该二齿配体和使用该催化剂的羰基化方法n的催化剂。
Abstract:
A process for making 6-aminocaproic acid by hydroformylating 3-pentenenitrile to produce 3-, 4-, and 5-formylvaleronitrile (FVN mixture), oxidizing the FVN mixture to produce 3-, 4-, and 5-cyanovaleric acid; hydrogenating the resulting product to produce 6-aminocaproic acid, 5-amino-4-methylvaleric acid, and 4-amino-3-ethylbutyric acid; and isolating 6-aminocaproic acid from the reaction product. The resulting 6-aminocaproic acid can be cyclized to produce caprolactam.
Abstract:
Process for the preparation of a mixture of epsilon -caprolactam and epsilon -caprolactam precursors by reductively aminating 5-formylvaleric acid and/or 5-formylvalerate ester(s) in water with hydrogen and an excess of ammonia in the presence of a hydrogenation catalyst, wherein the process is conducted in a reactor of which the inside reactor wall material is a material containing at most 8 wt.% nickel.
Abstract:
The invention relates to a method for producing cyclic lactams of the formula (II), wherein n and m may each represent 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9 and the sum of n + m is at least 3, preferably at least 4, R and R represent C1-C6 alkyl, C5-C7 cycloalkyl or C6-C12 aryl groups, by reacting a compound of the formula (I), wherein R , R , m and n have the meaning indicated above, and R represents nitrile groups, carboxylic acid amide groups and carboxylic acid groups, with water vapor in the gaseous phase. The inventive method is further characterized in that a) the compound (I) is reacted with water vapor in the gaseous phase, adding an organic diluent (III) before or after the reaction, which diluent has a miscibility gap under certain quantitative, pressure and temperature conditions, said reaction resulting in a mixture (IV) that contains a lactam (II), b) adjusting the mixture (IV) before or after the removal of ammonia to quantitative, pressure and temperature conditions under which the diluent (III) and water are present in a liquid form and have a miscibility gap, and obtaining a two-phase system consisting of a phase (V) that has a higher proportion of diluent (III) than water, and a phase (VI) that has a higher proportion of water than diluent (III), c) separating phase (V) from phase (VI) and, d) removing from phase (V) the diluent (III) and optionally by-products selected from the group of the low-boilers, high-boilers and unreacted compound (I), and obtaining a lactam (II).
Abstract:
The invention concerns a method for cyclizing hydrolysis of an aminonitrile compound into a lactam in the presence of a catalyst. More particularly, it concerns a method for cyclizing hydrolysis of an aminonitrile compound in the presence of a macroporous particulate catalyst resulting from deposit/impregnation of an oxygen-containing compound on a macroporous support such as alumina. The invention is particularly useful for preparing epsilon -caprolactam by cyclizing hydrolysis of aminocapronitrile.
Abstract:
Process to prepare epsilon -caprolactam starting from a starting mixture containing a 6-aminocaproate ester, in which in a first step (1) the 6-aminocaproate ester is converted into 6-aminocaproic acid and 6-aminocaproamide by reaction with water in the presence of ammonia at a temperature of between 50 and 250 DEG C, with a separate or simultaneous removal of alcohol(s), and in a subsequent step (2) the 6-aminocaproic acid and 6-aminocaproamide are cyclizised at an elevated temperature, wherein in step (1) the 6-aminocaproate ester is converted into 6-aminocaproic acid and 6-aminocaproamide in the presence of an amount higher than 2 wt.% and less than or equal to 25 wt.% NH3 (relative to the total amount of organic compounds, water and ammonia present in step (1)).