Chemistry: molecular biology and microbiology – Micro-organism – tissue cell culture or enzyme using process... – Preparing oxygen-containing organic compound
Patent
1980-09-23
1983-03-08
Jones, Raymond N.
Chemistry: molecular biology and microbiology
Micro-organism, tissue cell culture or enzyme using process...
Preparing oxygen-containing organic compound
435161, 435165, 203 19, C12P 706, C12P 710, C12P 714, C07C 3108
Patent
active
043761631
ABSTRACT:
This invention relates to a process for producing ethanol by continuous fermentation of polysaccharide-containing raw materials. The fermentation is carried out in one or several fermentors, a stream of fermentation liquor being separated into a yeast concentrate stream and a yeast-free stream, and possibly one sludge stream, of which the yeast concentrate stream is recirculated to the fermentor, at least part of the yeast-free stream being fed to a simple evaporator unit, corresponding to one or a few distilling stages, wherein it is separated, partly into a first vapor stream, enriched in ethanol, which is fed to a plant for production of the desired ethanol grade, and partly into a first liquid bottom stream, which is at least in part recirculated to the fermentor. Especially characterizing for the new process is, that a raw material stream is fed to a circulation circuit, comprising said fermentor and said evaporator unit, and that the raw material stream is hydrolyzed, in the evaporator unit, to a fermentable state. It is especially advantageous to carry out this hydrolysis by enzymes, preferably by a gluco-amylase at a temperature within the range 35.degree. C. to 75.degree. C.
REFERENCES:
patent: 385625 (1887-05-01), Horne
patent: 1884272 (1932-10-01), Sak
patent: 1921991 (1929-11-01), Hildebrandt
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patent: 2356218 (1941-09-01), Christensen
patent: 4009075 (1977-02-01), Hoge
patent: 4220721 (1980-09-01), Emert et al.
Cysewski et al., Biotechnology and Bioengineering, vol. XX, p. 1421-1444, 1968 (p. 1431-1435).
Alfa-Laval AB
Jones Raymond N.
Tarcza John E.
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