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Increase of alcohol yield per ton of pulp

Journal Article:

Abstract

Digestion processes of cellulose were studied under production conditions. When the digestion was carried out with acid having 5.2% total SO/sub 2/ and 0.92% CaO, the concentration of total sugars in the spent liquor was 1.8 to 2.5%. When the acidity was reduced to 4.8% total SO/sub 2/ and 0.82% CaO, all other conditions being the same, the sugar concentration in the spent liquor increased to 3.0 to 3.7%. The importance of the acid strength and CaO content of the cooking liquor was further demonstrated at the end of 1955. At that time the total SO/sub 2/ in the acid rose to 8% while the amount of CaO remained practically the same-0.85 to 0.90%. These conditions permitted an increase in the amount of ships by 25 to 30%, which further changed the ratio CaO: wood and created conditions favorable for an improved yield of sugar. The increase in the activity of the acid was reflected favorably in the degree of hydrolysis of the hemicelluloses and in the degree to which the oligosaccharides or polysaccharides were hydrolyzed to simple sugars. At that time the yield of alcohol reached 53 1/ton of unbleached pulp. The process was further improved in 1956 by  More>>
Authors:
Publication Date:
Jan 01, 1957
Product Type:
Journal Article
Reference Number:
EDB-80-122109
Resource Relation:
Journal Name: Gidroliz. Lesokhim. Prom-st.; (USSR); Journal Volume: 10:4
Subject:
09 BIOMASS FUELS; CELLULOSE; ACID HYDROLYSIS; ETHANOL; BIOSYNTHESIS; CHEMICAL REACTION YIELD; CALCIUM OXIDES; DIGESTION; HEMICELLULOSE; OLIGOSACCHARIDES; OPTIMIZATION; POLYSACCHARIDES; SACCHAROSE; SPENT LIQUORS; SULFUR DIOXIDE; ALCOHOLS; ALKALINE EARTH METAL COMPOUNDS; CALCIUM COMPOUNDS; CARBOHYDRATES; CHALCOGENIDES; CHEMICAL REACTIONS; DECOMPOSITION; DISACCHARIDES; HYDROLYSIS; HYDROXY COMPOUNDS; INDUSTRIAL WASTES; LIQUID WASTES; LYSIS; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; SACCHARIDES; SOLVOLYSIS; SULFUR COMPOUNDS; SULFUR OXIDES; SYNTHESIS; WASTES; YIELDS; 090222* - Alcohol Fuels- Preparation from Wastes or Biomass- (1976-1989); 140504 - Solar Energy Conversion- Biomass Production & Conversion- (-1989)
OSTI ID:
5037605
Country of Origin:
USSR
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: GLKPA
Submitting Site:
IEA
Size:
Pages: 20-21
Announcement Date:

Journal Article:

Citation Formats

Sokolov, B N. Increase of alcohol yield per ton of pulp. USSR: N. p., 1957. Web.
Sokolov, B N. Increase of alcohol yield per ton of pulp. USSR.
Sokolov, B N. 1957. "Increase of alcohol yield per ton of pulp." USSR.
@misc{etde_5037605,
title = {Increase of alcohol yield per ton of pulp}
author = {Sokolov, B N}
abstractNote = {Digestion processes of cellulose were studied under production conditions. When the digestion was carried out with acid having 5.2% total SO/sub 2/ and 0.92% CaO, the concentration of total sugars in the spent liquor was 1.8 to 2.5%. When the acidity was reduced to 4.8% total SO/sub 2/ and 0.82% CaO, all other conditions being the same, the sugar concentration in the spent liquor increased to 3.0 to 3.7%. The importance of the acid strength and CaO content of the cooking liquor was further demonstrated at the end of 1955. At that time the total SO/sub 2/ in the acid rose to 8% while the amount of CaO remained practically the same-0.85 to 0.90%. These conditions permitted an increase in the amount of ships by 25 to 30%, which further changed the ratio CaO: wood and created conditions favorable for an improved yield of sugar. The increase in the activity of the acid was reflected favorably in the degree of hydrolysis of the hemicelluloses and in the degree to which the oligosaccharides or polysaccharides were hydrolyzed to simple sugars. At that time the yield of alcohol reached 53 1/ton of unbleached pulp. The process was further improved in 1956 by the use of successive washings; at the end of the digestion period the concentrated spent liquor was piped to the alcohol unit. The yield of alcohol reached 59.4 1/ton of pulp. Sugar recovery from the tank was 92.5% of that theoretically possible. Further improvements resulted by saturating the wood chips with acid under variable pressures. As a result, the base of the cooking acid was reduced to 0.7 to 0.72% and, at the end of the process the liquor contained 0.03 to 0.06% CaO instead of 0.2 to 0.18%. The alcohol yield/ton of pulp then rose to 66.8 l.}
journal = {Gidroliz. Lesokhim. Prom-st.; (USSR)}
volume = {10:4}
journal type = {AC}
place = {USSR}
year = {1957}
month = {Jan}
}