发明名称 |
METHOD OF DIACETONE-L-SORBOSE SYNTHESIS |
摘要 |
FIELD: chemical technology, production of vitamins. SUBSTANCE: method involves acetonation of L-sorbose in the presence of catalyst - 24% oleum (or equivalent amount of concentrated sulfuric acid) and dehydrating agent - zeolite NaA. Acetonation components were taken at ratio, mas. p. p.: L-sorbose : oleum : acetone = 1:(0.01-0.022):(13-16). Reaction is carried out at acetone boiling point for 4 h, then solution is cooled to (-10)-(-15) C, kept for 1 h and neutralized with alkali an aqueous solution to weak alkaline reaction (pH = 8-9). Diacetone-L-sorbose is isolated by extraction with chloroform followed by solvent distillation off or extraction with toluene followed by its distillation off. Product is used for synthesis of ascorbic acid. EFFECT: increased yield of product, decreased amount of sodium salt formed. 2 tblt
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申请公布号 |
RU2101290(C1) |
申请公布日期 |
1998.01.10 |
申请号 |
RU19950104690 |
申请日期 |
1995.03.31 |
申请人 |
KONTSERN "ALTAJ";NAUCHNO-PROIZVODSTVENNOE OB"EDINENIE "ALTAJ";N PROIZV OB EDINENIE ALTAJ |
发明人 |
LOBANOVA A.A.;PANKRATOVA G.A.;IL'JASOV S.G.;LOBANOVA A.A.;PANKRATOVA G.A.;IL'JASOV S.G. |
分类号 |
C07H9/04;(IPC1-7):C07H9/04 |
主分类号 |
C07H9/04 |
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