Catalytic Deamination for Caprolactam Production
AssigneeBoard of Trustees of Michigan State University
InventorJohn W. Frost
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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.
Claims57
A process for preparing caprolactam or a derivative thereof, the process comprising contacting a reactant comprising lysine, alpha aminocaprolactam or a salt thereof, with a catalyst and a gas comprising hydrogen gas, optionally in the presence of a solvent.
A process for preparing pipecolinic acid, comprising the step of contacting a reactant comprising lysine with a catalyst, and a gas comprising hydrogen gas, in the presence of a solvent comprising water.
A process for preparing caprolactam, the process comprising:
- (a) heating a reactant comprising lysine or salt thereof to a temperature of about 50° C. to 300° C., optionally in the presence of a first catalyst to produce a first reaction product comprising alpha amino caprolactam:
- (b) contacting said first reaction product with a gas comprising hydrogen and a second catalyst to produce a second reaction product comprising caprolactam;
- (c) recovering caprolactam from the second reaction product to produce a recovered caprolactam.
Dependencies are inferred from the claim text.