Method for recovering L-phenylalanine

Details Method for recovering L-phenylalanine Method for recovering L-phenylalanine

1994-02-02

1995-11-14

Chan, Nicky

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

558 43, C07C 53134

Patent

active

054668646

ABSTRACT:
The present invention provides crystals of L-phenylalanine monomethyl sulfate which have low solubility compared to L-tyrosine and D-phenylalanine. The L-phenylalanine monomethylsulfate crystals are obtained by subjecting a solution containing monomethyl sulfuric acid and phenylalanine to crystallization.
Further, the present invention also provides a process for recovering L-phenylalanine from a water layer by neutralizing the esterified reaction, extracting an ester of L-phenylalanine therefrom with an organic solvent, and recovering remaining L-phenylalanine in the water layer as L-phenylalanine monomethylsulfate. L-phenylalanine monomethyl sulfate is obtained by esterifying L-phenylalanine and methanol in the presence of sulfuric acid, neutralizing the esterified solution with a base in the presence of water, extracting the produced L-phenylalanine methyl ester from the neutralized solution with an organic solvent, and then crystallized the resultant water layer under acidic condition.

REFERENCES:
patent: 4399304 (1983-08-01), Matsuishi et al.

Affiliated with

Also associated with

Rating

Method for recovering L-phenylalanine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for recovering L-phenylalanine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recovering L-phenylalanine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1222405