Process for purifying sucrose fatty acid esters

Details Process for purifying sucrose fatty acid esters Process for purifying sucrose fatty acid esters

1989-06-23

1991-04-30

Griffin, Ronald W.

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

Organic compounds

Carbohydrates or derivatives

536115, 536120, 536124, 536127, C07H 100, C07H 1300, C08B 3700, C13D 300

Patent

active

050119222

ABSTRACT:
A process for purifying sucrose fatty acid esters included in a reaction mixture formed by a reaction of sucrose and a fatty acid alkyl ester in an organic solvent as reaction medium in the presence of a catalyst, which comprises adjusting the reaction mixture from which a part of the organic solvent as reaction medium may be previously removed and to which water is added to form an aqueous solution, to a neutral pH region, adding a neutral salt and sucrose to the solution to precipitate the sucrose fatty acid ester, filtering off the precipitate, and washing the precipitate with an acidic water. The washed precipitate in the form of slurry is spray-dried to form a dry powder, and the filtrate is contacted with a reverse osmosis membrane to recover sucrose. According to the invention, purified sucrose fatty acid esters can be obtained from the reaction mixture without using an organic solvent as purification solvent, while sucrose can be recovered in high yield.

REFERENCES:
patent: 3792041 (1970-10-01), Yamagishi et al.
patent: 4252834 (1981-02-01), Inamine et al.
Abstract of Japanese Patent Publication No. 8850/67, Derwent Japanese Patents Report, vol. 6, No. 16, 1967, General Organic-p. 4.

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