Patent US4557729A successfully refreshed from Google Patents.
US4557729A
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Color stabilization of glycosides
Assignee: Henkel AG and Co KGaA
•
Filing: 1984-05-24
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Granted: 1985-12-10
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Expires: 2004-05-24
Abstract
Abstract Desirable color of glycosides are obtained through bleaching and stabilization with a source of sulfur dioxide.
Inventors
- 👤 Robert S. McDaniel, Jr.
- 👤 Paul R. Glor
- 👤 Hunter L. Kickle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:49
CPC Classifications
C; C07; C07H; C07H15/00; C07H15/02; C07H15/04; C11; C11D; C11D1/00; C11D1/66; C11D1/662
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
30 words
A process for bleaching glycosides selected from the group consisting of mono and polyglycosides and mixtures thereof comprising the steps of: (a) exposing the glycoside material to hydrogen peroxide; and
Claim 2
Dependent Claim
30 words
A process for bleaching glycosides selected from the group consisting of mono and polyglycosides and mixtures thereof comprising the steps of: (a) exposing the glycoside material to hydrogen peroxide; and
Claim 3
Dependent Claim
27 words
(b) exposing the mixture of the glycoside material and the hydrogen peroxide to a source of sulfur dioxide; and recovering the bleached glycoside material from the process.
Claim 4
Dependent Claim
27 words
(b) exposing the mixture of the glycoside material and the hydrogen peroxide to a source of sulfur dioxide; and recovering the bleached glycoside material from the process.
Claim 5
Dependent Claim
64 words
A process for bleaching glycosides selected from the group consisting of mono and polyglycosides and mixtures thereof comprising the steps of: (a) exposing the glycoside material to a first bleaching agent; and (b) then exposing the mixture of the glycoside material and the first bleaching agent to a source of sulfur dioxide in salt form; and recovering the bleached glycoside material from the process.
Claim 6
Dependent Claim
64 words
A process for bleaching glycosides selected from the group consisting of mono and polyglycosides and mixtures thereof comprising the steps of: (a) exposing the glycoside material to a first bleaching agent; and (b) then exposing the mixture of the glycoside material and the first bleaching agent to a source of sulfur dioxide in salt form; and recovering the bleached glycoside material from the process.
Claim 7
Dependent Claim
47 words
A process for stabilizing the color of glycosides comprising the steps of: (a) obtaining an aqueous solution of a glycoside; (b) thereafter introducing a sufficient amount of a source of sulfur dioxide to stabilize the color of the glycoside, thereby substantially avoiding color degradation of the glycoside.
Claim 8
Dependent Claim
47 words
A process for stabilizing the color of glycosides comprising the steps of: (a) obtaining an aqueous solution of a glycoside; (b) thereafter introducing a sufficient amount of a source of sulfur dioxide to stabilize the color of the glycoside, thereby substantially avoiding color degradation of the glycoside.
Claim 9
Dependent Claim
26 words
A composition of matter comprising a bleached glycoside and a sufficient amount of a source of sulfur dioxide to substantially inhibit color degradation of the glycoside.
Claim 10
Dependent Claim
26 words
A composition of matter comprising a bleached glycoside and a sufficient amount of a source of sulfur dioxide to substantially inhibit color degradation of the glycoside.
Claim 11
Dependent Claim
43 words
The process or composition of claims 1, 2, 3, or 4 wherein the source of sulfur dioxide is a member selected from the group consisting of sulfur dioxide, sodium bisulfite, sodium metabisulfite, sodium sulfite, sodium hydrosulfite, potassium sulfite, potassium bisulfite and mixtures thereof.
Claim 12
Dependent Claim
18 words
The composition of claim 4 wherein there is at least 200 ppm of sulfur dioxide per part glycoside.
Claim 13
Dependent Claim
21 words
The process of claim 2 wherein the bleaching agent is hydrogen peroxide and the source of sulfur dioxide is sodium bisulfite.
Claim 14
Dependent Claim
21 words
The process of claim 1 wherein the source of sulfur dioxide is not added until the hydrogen peroxide is substantially depleted.
Claim 15
Dependent Claim
24 words
The process or composition of claims 1, 2, 3 or 4 wherein the D.P. of the glycoside is from about 1.5 to about 15.
Claim 16
Dependent Claim
17 words
The process or composition of claims 1, 2, 4, or 4 wherein the glycoside is a glucoside.
Claim 17
Dependent Claim
30 words
The process or composition of claims 1, 2, 3, or 4 wherein the the glycoside is an alkyl glycoside and the alkyl portion contains from 6 to 22 carbon atoms.
Claim 18
Dependent Claim
13 words
The process or composition of claim 1 wherein the glycoside is a monoglycoside.
References Cited (Backward Citations)
US2072665A
Cited
US2172233A
Cited
US2875018A
Cited
US2860945A
Cited
US3086534A
Cited
US3077372A
Cited
US3114192A
Cited
US3219656A
Cited
US3345303A
Cited
US3378444A
Cited
US3450690A
Cited
US3547828A
Cited
US3640998A
Cited
US3997659A
Cited
US3974138A
Cited
US3960649A
Cited
US3962030A
Cited
US4154706A
Cited
EP0077167A1
Cited
US4393203A
Cited
US4393203B1
Cited
US4393203B2
Cited
EP0096917A1
Cited
EP0099183A1
Cited
EP0102558A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-09 | 1989-06-10 | 1989-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-09 | 1993-06-10 | 1993-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-09 | 1997-06-10 | 1997-12-10 | $7700.00 | Window Closed / Lapsed |