INDIRECT PRODUCTION OF BUTANOL AND HEXANOL
First Claim
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1. A method to produce butanol and hexanol, comprising:
- (a) conducting a homoacetogenic fermentation in a medium comprising a carbohydrate source to produce acetate, acetic acid or mixtures thereof;
(b) chemically converting a portion of the acetate, acetic acid or mixtures thereof to ethanol;
(c) conducting an acidogenic fermentation in a medium comprising the ethanol and a portion of the acetate, acetic acid or mixtures thereof to produce butyrate, butyric acid, caproate, caproic acid or mixtures thereof; and
(d) chemically converting the butyrate, butyric acid, caproate, caproic acid or mixtures thereof to the butanol and hexanol.
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Abstract
A process for the conversion of carbohydrates from any of a number of sources into butanol and hexanol for fuel or chemical use is disclosed. The process includes conducting a homoacetogenic fermentation to produce an acetic acid intermediate which is chemically converted to ethanol. The ethanol and a remaining portion of the acetic acid intermediate are used as a substrate in an acidogenic fermentation to produce butyric and caproic acid intermediates which are then chemically converted to butanol and hexanol.
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Citations
37 Claims
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1. A method to produce butanol and hexanol, comprising:
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(a) conducting a homoacetogenic fermentation in a medium comprising a carbohydrate source to produce acetate, acetic acid or mixtures thereof; (b) chemically converting a portion of the acetate, acetic acid or mixtures thereof to ethanol; (c) conducting an acidogenic fermentation in a medium comprising the ethanol and a portion of the acetate, acetic acid or mixtures thereof to produce butyrate, butyric acid, caproate, caproic acid or mixtures thereof; and (d) chemically converting the butyrate, butyric acid, caproate, caproic acid or mixtures thereof to the butanol and hexanol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A method to produce butanol and hexanol, comprising:
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(a) conducting an acidogenic fermentation in a medium comprising ethanol and acetate, acetic acid or mixtures thereof to produce butyrate, butyric acid, caproate, caproic acid or mixtures thereof; and (b) chemically converting the butyrate, butyric acid, caproate, caproic acid or mixtures thereof to the butanol and hexanol.
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37-72. -72. (canceled)
Specification