EP0099183A1
Expired / Lapsed
EP
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Method for preparing organo glycosides
Assignee: Primary Products Ingredients Americas LLC
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Filing: 1983-06-15
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Granted: —
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Expires: 2003-06-15
Abstract
Abstract Organo glycoside ethers are prepared by reacting saccharide containing compositions with alcohols of 3 or more carbon atoms in the presence of 2 or more moles of water for each aldose unit mole. The method is particularly effective for converting polysaccharides, such as starches to alkyl glycosides by means of a reaction media comprised of starch, an alkanol of at least 3 carbon atoms and at least one other alcohol-soluble organo co-solvent in the presence of an acid catalyst at elevated temperatures under pressure.
Inventors
- 👤 Rolland William Phillip Short
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 06:13
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A method for converting saccharides and alcohol into organo glycoside mixtures, characterised in that a saccharide is reacted with an organo alcohol of at least 3 carbon atoms under superatmospheric pressure and at a temperature sufficient to convert the saccharide and alcohol into an organo glycoside mixture, the reaction being carried out in the presence of at least 2 moles water for each saccharide molar unit and an effective amount of catalyst, and at least a portion of the organo glycoside mixture is recovered from the reaction mixture.
Claim 2
Independent Claim
88 words
A method for converting saccharides and alcohol into organo glycoside mixtures, characterised in that a saccharide is reacted with an organo alcohol of at least 3 carbon atoms under superatmospheric pressure and at a temperature sufficient to convert the saccharide and alcohol into an organo glycoside mixture, the reaction being carried out in the presence of at least 2 moles water for each saccharide molar unit and an effective amount of catalyst, and at least a portion of the organo glycoside mixture is recovered from the reaction mixture.
Claim 3
Dependent Claim
35 words
A method as claimed in claim 1 characterised in that the organo alcohol comprises the major liquid component of the reaction medium and the reaction medium additionally contains at least one other alcohol-soluble organic co-solvent.
Claim 4
Dependent Claim
25 words
A method as claimed in claim 2 characterised in that the alcohol-soluble organic co-solvent is at least one of acetone, ethylene glycol, methanol and ethanol.
Claim 5
Dependent Claim
24 words
A method as claimed in claim 2 or 3 characterised in that the major liquid component of the reaction medium comprises a monchydric alcohol.
Claim 6
Dependent Claim
24 words
A method as claimed in Claim 4 characterised in that the monohydric alcohol comprises an alkanol containing from 3 to 5 carbon atoms inclusive.
Claim 7
Independent Claim
47 words
A method as claimed in any of claims 1 to 5 characterised in that the liquid dispersant contains from 2 to 6 moles water for each anhydrous glucose mole and the reaction is conducted in a tubular reaction zone at a temperature ranging from 120°C to 200°C.
Claim 8
Independent Claim
32 words
A method as claimed in any of claims 1 to 6 characterised in that the polysaccharide consists- essentially of a starch and the liquid dispersant consists essentially of butanol, water and methanol.
Claim 9
Dependent Claim
30 words
.8. A method as claimed in claim 7 characterised in that the weight ratio of butanol to total water and methanol of the liquid dispersant ranges from 3:1 to 4:1.
Claim 10
Dependent Claim
22 words
A method as claimed in claim 8 characterised in that the reaction is conducted at a temperature ranging from 140 to 180°C.
Claim 11
Dependent Claim
58 words
A method as claimed in claim 3 characterised in that the weight ratio of monohydric alochol to the total water and co-solvent weight ranges from 2:1 to 4:1, the monohydric alcohol comprises an alkanol of 3 to 4 carbon atoms, the saccharide comprises starch and the conversion reaction is conducted at a temperature ranging from 140°C to 180°C.
References Cited (Backward Citations)
US2390507A
Cited
US4223129A
Cited
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