Process for the production of organic fuel
First Claim
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1. A method for producing a non-potable oxo- or oxy-aliphatic organic fuel boiling within the range of 20°
- to 200°
C. and containing lower aliphatic monohydric alcohols or carbonyl compounds, which method comprises the steps of;
(a) blending water, a cellulose- or hemicellulose-containing particulate mass, and a fermentation agent to form a fermentation medium, said fermentation agent being selected from the group consisting of;
(i) a deliberate combination of at least two carbohydrase-producing Clostridium species in a ratio ranging from 9;
1 to 1;
9, at least one of said species being capable of producing cellulase; and
(ii) the carbohydrase enzymes produced by said combination;
(b) fermenting said particulate mass at fermentation temperatures, with supression of carboxylic acid production, until fermentation products are produced; and
(c) recovering the non-potable organic fuel from said fermentation medium.
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Abstract
In the disclosed cellulase-catalyzed fermentation process for converting a cellulose- or hemicellulose-containing starting material to an organic fuel, the fermentation medium contains an efficient combination of Clostridium organisms or their enzymes. One preferred combination of organisms includes Cl. cellobioparum and Cl. acetobutylicum. Conversion of the cellulose to a liquid hydrocarbon oxidate proceeds in good yield with relativey minimal carboxylic acid production. The nondistillable residue is suitable for use as a fertilizer.
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Citations
13 Claims
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1. A method for producing a non-potable oxo- or oxy-aliphatic organic fuel boiling within the range of 20°
- to 200°
C. and containing lower aliphatic monohydric alcohols or carbonyl compounds, which method comprises the steps of;(a) blending water, a cellulose- or hemicellulose-containing particulate mass, and a fermentation agent to form a fermentation medium, said fermentation agent being selected from the group consisting of; (i) a deliberate combination of at least two carbohydrase-producing Clostridium species in a ratio ranging from 9;
1 to 1;
9, at least one of said species being capable of producing cellulase; and(ii) the carbohydrase enzymes produced by said combination; (b) fermenting said particulate mass at fermentation temperatures, with supression of carboxylic acid production, until fermentation products are produced; and (c) recovering the non-potable organic fuel from said fermentation medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
- to 200°
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9. A method for producing a non-potable, liquid C1 to C5 oxo- or oxy-aliphatic fuel while suppressing the production of aliphatic carboxylic acids, said fuel boiling within the range of 50°
- to 150°
C., which method comprises the steps of;(a) blending water, a cellulose- or hemicellulose-containing particulate mass which is generally -50 U.S. mesh in particle size, and a fermentation agent to form a fermentation medium, said fermentation agent being prepared by deliberately combining at least two enzyme systems including a major amount of enzyme system obtained from Clostridium cellobioparum and a minor amount, greater than 20% of enzyme system obtained from Clostridium acetobutylicum; (b) maintaining the said fermentation medium at normal ambient temperatures for at least about 12 hours; (c) fermenting the cellulose or hemicellulose in said fermentation medium for at least 12 hours at a fermentation temperature ranging from 5°
to 50°
C. and a pH ranging from 5 to 7 until aliphatic carbonyl compounds or aliphatic monohydric alcohols are produced by said fermentation medium;(d) separating said aliphatic carbonyl compounds or aliphatic monohydric alcohols from said fermentation medium. - View Dependent Claims (10, 11, 12, 13)
- to 150°
Specification