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US4483979A
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Polar solvent extraction of colored materials from alkylsaccharides under essentially anhydrous conditions
Assignee: Procter and Gamble Co
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Filing: 1982-12-08
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Granted: 1984-11-20
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Expires: 2002-12-08
Abstract
Abstract A process for removing colored materials from alkylpolysaccharides by extracting the colored materials with polar solvents under essentially anhydrous conditions.
Inventors
- 👤 Mark H. K. Mao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:45
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C08; C08B; C08B37/00; C08B37/0003
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
119 words
The process of removing colored materials which result from the preparation of alkyl saccharides by reacting an alcohol selected from the group consisting of aliphatic, aromatic and mixed aliphatic and aromatic alcohols containing from about 8 to about 24 carbon atoms with a 5- or 6-membered reducing saccharide or source thereof in the presence of an acid catalyst from said alkyl saccharides comprising extracting the colored materials with a polar solvent having a polarity of from about 1 to about 4, and a boiling point of from about 30° C. to about 200° C., the amount of polar solvent being from about 50% to about 1000% of said alkyl saccharides, and said solvent containing less than about 2% water.
Claim 2
Dependent Claim
119 words
The process of removing colored materials which result from the preparation of alkyl saccharides by reacting an alcohol selected from the group consisting of aliphatic, aromatic and mixed aliphatic and aromatic alcohols containing from about 8 to about 24 carbon atoms with a 5- or 6-membered reducing saccharide or source thereof in the presence of an acid catalyst from said alkyl saccharides comprising extracting the colored materials with a polar solvent having a polarity of from about 1 to about 4, and a boiling point of from about 30° C. to about 200° C., the amount of polar solvent being from about 50% to about 1000% of said alkyl saccharides, and said solvent containing less than about 2% water.
Claim 3
Dependent Claim
44 words
The process of claim 1 wherein the polar solvent has a polarity of from 1.2 to about 3, and boils from about 45° C. to about 150° C., and the amount of solvent is from about 100% to about 500% of the alkyl saccharide.
Claim 4
Dependent Claim
14 words
The process of claim 2 wherein the solvent contains less than about 0.5% water.
Claim 5
Dependent Claim
60 words
The process of claim 1 wherein the solvent is selected from the group consisting of tetrahydrofuran, acetone, di-N-propyl ether, dioxane, bis-2-methoxyethyl ether, dimethyl sulfoxide, dimethyl sulfone, di-N-propyl sulfone, dibutyl oxide, bis-2-methoxyethyl ether, nitrobenzene, acetonitrile, formamide, dimethyl formamide, methyl ethyl ketone, diethyl ketone, butyl aldehyde, ethyl acetate, propyl acetate, ethyl cellulose, butyl cellulose, chloroform, methylene chloride, tetrachloro ethylene, and mixtures thereof.
Claim 6
Dependent Claim
12 words
The process of claim 4 wherein said solvent comprises a nonpolar solvent.
Claim 7
Dependent Claim
14 words
The process of claim 4 wherein the solvent contains less than about 0.5% water.
Claim 8
Dependent Claim
28 words
The process of claim 4 wherein the solvent comprises a material selected from the group consisting of acetone, ethyl acetate, methyl ethyl ketone, diethyl lactone, and mixtures thereof.
Claim 9
Dependent Claim
14 words
The process of claim 7 wherein the solvent contains less than about 0.5% water.
Claim 10
Dependent Claim
19 words
The process of claim 7 wherein the solvent is from about 200% to about 300% of the alkyl saccharide.
Claim 11
Dependent Claim
14 words
The process of claim 9 wherein the solvent contains less than about 0.5% water.
Claim 12
Dependent Claim
17 words
The process of claim 10 wherein the solvent's polarity is from about about 1.2 to about 3.
Claim 13
Dependent Claim
37 words
The process of claim 1 wherein in the alkyl saccharide the alkyl group contains from about 8 to 20 carbon atoms and the saccharide portion contains from about 1.5 to about 10 saccharide units on the average.
Claim 14
Dependent Claim
36 words
The process of claim 12 wherein said alkyl group contains from about 10 to about 16 carbon atoms and wherein the average number of saccharide units in the molecule is from about 1.5 to about 4.
Claim 15
Dependent Claim
44 words
The process of claim 13 wherein the polar solvent has a polarity of from 1.2 to about 3, and boils from about 45° C. to about 150° C., and the amount of solvent is from about 100% to about 500% of the alkyl saccharide.
Claim 16
Dependent Claim
14 words
The process of claim 14 wherein the solvent contains less than about 0.5% water.
Claim 17
Dependent Claim
61 words
The process of claim 13 wherein the solvent is selected from the group consisting of tetrahydrofuran, acetone, di-N-propyl ether, dioxane, bis-2-methoxyethyl ether, dimethyl sulfoxide, dimethyl sulfone, di-N-propyl sulfone, dibutyl oxide, bis-2-methoxyethyl ether, nitrobenzene, acetonitrile, formamide, dimethyl formamide, methyl ethyl ketone, diethyl ketone, butyl aldehyde, ethyl acetate, propyl acetate, ethyl cellulose, butyl cellulose, chloroform, methyl chloride from tetrachloro ethylene, and mixtures thereof.
Claim 18
Dependent Claim
12 words
The process of claim 16 wherein said solvent comprises a nonpolar solvent.
Claim 19
Dependent Claim
14 words
The process of claim 16 wherein the solvent contains less than about 0.5% water.
Claim 20
Dependent Claim
28 words
The process of claim 16 wherein the solvent comprises a material selected from the group consisting of acetone, ethyl acetate, methyl ethyl ketone, diethyl lactone, and mixtures thereof.
Claim 21
Dependent Claim
14 words
The process of claim 19 wherein the solvent contains less than about 0.5% water.
Claim 22
Dependent Claim
19 words
The process of claim 19 wherein the solvent is from about 200% to about 300% of the alkyl saccharide.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-20 | 1988-05-21 | 1988-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-20 | 1992-05-21 | 1992-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-20 | 1996-05-21 | 1996-11-20 | $7700.00 | Window Closed / Lapsed |