Process for producing ethanol
US5231017A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 1991 |
| Grant date | Jul 27, 1993 |
| Priority date | — |
| Expiry date | May 17, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E50/10
- WIPO fieldBiotechnology
- WIPO sectorChemistry
Abstract
The invention relates to a process for producing ethanol from raw materials, that contain fermentable sugars or constituents which can be converted into sugars, comprising the steps of: PA0 a-liquefaction of the raw materials in the presence of an alpha-amylase for obtaining liquefied mash, PA0 b-saccharification of the liquefied mash in the presence of a glucoamylase for obtaining hydrolyzed starch and sugars, PA0 c-fermentation of the hydrolyzed starch and sugars by yeast for obtaining ethanol, and PA0 d-recovering alcohol, a protease being introduced in the liquefied mash during the saccharification and/or in the hydrolyzed starch and sugars during the fermentation. The invention relates also to a composition containing a glucoamylase and an acid fungal protease.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.