Ajinomoto Co., Ltd.

Masayoshi Naruse

Shinichi Kishimoto

Masao Nakamura

Hideo Takeda

Haruo Kawasaki

Harutoshi Oura

Shigeho Ikeda

Yoshimi Nagano

Hisao Ito

Toru Nakamura

Kiyoshi Tanaka

Yasushi Morinaga

Akihiro Nakatani

Yoichi Ozawa

Chiaki Sano

Akihiko Yasaki

Harutoshi Ohura

Hiroshi Fukushi

Takafumi Tosa

Akio Nishi

Masasi Miyazawa

Method for the separation of rapeseed germ and rapeseed germ oil

A crystalline L-alpha-aspartyl-L-phenyl-alanine methyl ester product is disclosed. The product is obtained by crystallizing the ester from an aqueous solution, by cooling. The initial concentration of ester in the aqueous solution used provides at least 10 grams of precipitated solid phase per liter of solution. The solution is cooled through conductive heat transfer without effecting forced flow to form a sherbet-like pseudo solid phase.

Process for crystallizing L-.alpha.-aspartyl-L-phenylanlanine methyl

A method for dissolving crystalline L-alpha-aspartyl-L-phenyl alanine methyl ester product is disclosed. The product is obtained by crystallizing the ester from an aqueous solution, by cooling. The initial concentration of ester in the aqueous solution used provides at least 10 grams of precipitated solid phase per liter of solution. The solution is cooled through conductive heat transfer without effecting forced flow to form a sherbet-like pseudo solid phase

Method of dissolving crystals of L-.alpha.-aspartyl-L-phenyl alanine

A crystalline L-.alpha.-aspartyl-L-phenylalanine methyl ester product and the process for obtaining the same are disclosed. This product is obtained by adjusting the initial concentration of L-.alpha.-aspartyl-L-phenylalanine methyl ester in an aqueous solution so that the amount of precipitated solid, formed after cooling said solution, is about 10 grams or more of precipitate per liter of solvent. The solution is then cooled through conductive heat transfer, without causing forced flow, to obtain a sherbet-like pseudo solid phase.

Process for crystallizing L-.alpha.-aspartyl-L-phenylalanine methyl ester

A method for dissolving crystalline L-alpha-aspartyl-L-phenyl-alanine methyl ester product is disclosed. The product is obtained by crystallizing the ester from an aqueous solution, by cooling. The initial concentration of ester in the aqueous solution used provides at least 10 grams of precipitated solid phase per liter of solution. The solution is cooled through conductive heat transfer without effecting forced flow to form a sherbet-like pseudo solid phase.

Method of dissolving crystals of L-.alpha.-aspartyl-L-phenylalanine

A process for obtaining dry crystals of .alpha.-L-aspartyl-L-phenylalanine methyl ester having a water content of about 2 wt. % to about 6 wt. % based on the weight of the wet crystals is disclosed. This process comprises exposing wet crystals of .alpha.-L-aspartyl-L-phenylalanine methyl ester, having a water content not greater than 50 wt. % based on the weight of the wet crystals and obtained by the crystallization of .alpha.-L-aspartyl-L-phenylalanine methyl ester from an unagitated solution of .alpha.-L-aspartyl-L-phenylalanine methyl ester, to a flow of air having a temperature of 80.degree. C. to 200.degree. C.

Process for preparing dry crystals of the methyl ester of

A process for crystallizing L-alpha-aspartyl-L-phenylalanine methyl ester from its aqueous solution by cooling, which comprises adjusting the initial concentration of the ester so that the amount of a precipitated solid phase to be formed after cooling becomes about 10 grams or more per liter of the solvent, cooling the solution through conductive heat transfer through a cooled surface to form an apparently sherbet-like pseudosolid phase without causing forced flow by mechanical stirring or the like, and optionally further cooling the system after formation of the pseudosolid phase, is disclosed along with various apparatuses which may be used to carry out the invention.

Process for crystallizing L-alpha-aspartyl-L-phenyl-alanine methyl ester

Process for crystallizing L-alpha-aspartyl-L-phenyl-alanine methyl

A process for isolating and purifying an amino acid, which comprises subjecting an aqueous solution of said amino acid containing impurities composed mainly of at least one member selected from the group consisting of acidic amino acids, lysine, ornithine, citrulline, histidine, PCA, sulfate ions, chloride ions and pigments to ion-exclusion chromatography using a strongly acidic cation exchange resin.

Process for isolating and purifying amino acids

A feed additive produced by concentrating an aqueous solution containing tryptophan and impurities both originating in the culture broth of a tryptophan-producing microorganism, with the pH of the aqueous solution being maintained in the range of 4 to 6 and the temperature thereof being maintained in the range of 20.degree. to 80.degree. C. during the process of concentrating.

Feed additive containing tryptophan

A process for production of a composition for animal feed, which comprises

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Yokohama, Japan

Masayoshi Naruse