FIELD: medicine. SUBSTANCE: essence of this method resides in extracting silt using mixture of ethyl alcohol and liquid carbonic acid. Concentration of ethyl alcohol must be between 19 and 49 %. Final step is distillation of alcohol. EFFECT: yield of end product increased from 2.54 to 2.95 g plus rejection of toxic solutions. 2 tbl
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0 |
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Authors
Dates
1995-02-09—Published
1991-10-09—Filed