Synthesis of caprolactam from lysine
First Claim
1. A process for synthesizing α
- -amino-ε
-caprolactam, the process comprising heating to reflux a salt of lysine in a solvent comprising an alcohol, without the presence of a catalyst, at a temperature of about 99°
C. to about 201°
C., to produce α
-amino-ε
-caprolactam.
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Accused Products
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.
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Citations
36 Claims
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1. A process for synthesizing α
- -amino-ε
-caprolactam, the process comprising heating to reflux a salt of lysine in a solvent comprising an alcohol, without the presence of a catalyst, at a temperature of about 99°
C. to about 201°
C., to produce α
-amino-ε
-caprolactam. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- -amino-ε
-
14. A process for the synthesis of ε
- -caprolactam, the process comprising;
(A) heating a salt of lysine in a solvent comprising an alcohol, at a temperature of about 99°
C. to about 201°
C., to produce α
-amino-ε
-caprolactam; and(B) deaminating α
-amino-ε
-caprolactam produced in (A) by a method comprising contacting it at least once with a deamination reagent or catalyst at a temperature below the freezing point of water, to produce ε
-caprolactam. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
- -caprolactam, the process comprising;
-
32. A process for synthesizing α
- -amino-ε
-caprolactam comprising;heating a mixture comprising a salt of lysine in a solvent comprising an alcohol, without the presence of a catalyst at a temperature of from about 99°
C. to about 201°
C.; andremoving water from the mixture during the heating step. - View Dependent Claims (33, 34, 35, 36)
- -amino-ε
Specification