US4308203A
Expired / Lapsed
US
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Sulfonated lignin dispersants and dyestuffs
Assignee: REED LIGNIN Inc A CORP OF
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Filing: 1980-02-22
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Granted: 1981-12-29
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Expires: 2000-02-22
Abstract
Abstract Dispersants, especially well suited for use with insoluble dyes, are produced by reacting hydroxyl benzyl alcohol compounds with sulfonated lignin derivatives. The dispersants have high levels of heat stability, coupled with desirable dye reduction, staining, foaming, milling and viscosity-reducing properties. Dyestuffs, dye pastes and dye baths, as well as methods utilizing them, are provided.
Inventors
- 👤 Stephen Y. Lin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
C; C08; C08H; C08H6/00; C09; C09B; C09B67/00; C09B67/0071; C09B67/0084; C09B67/0085; C09B67/0086; D; D06; D06P; D06P1/00; D06P1/44; D06P1/46; D06P1/48; D06P1/50; D06P1/64; D06P1/651; D06P1/65106; D06P1/65118
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
82 words
As a composition of matter, the lignin adduct of a sulfonated lignin material containing about 2 to 8 percent by weight of combined organic sulfur, and about 0.05 to 4.0 millimoles, per gram of the lignin moiety of said material, of an hydroxyl benzyl alcohol compound having the general formula: ##STR2## wherein n is an integer from 1 to 3 and A is a substituent selected from the group consisting of hydrogen, alkyl groups containing 1-4 carbon atoms and the hydroxymethyl group.
Claim 2
Dependent Claim
82 words
As a composition of matter, the lignin adduct of a sulfonated lignin material containing about 2 to 8 percent by weight of combined organic sulfur, and about 0.05 to 4.0 millimoles, per gram of the lignin moiety of said material, of an hydroxyl benzyl alcohol compound having the general formula: ##STR2## wherein n is an integer from 1 to 3 and A is a substituent selected from the group consisting of hydrogen, alkyl groups containing 1-4 carbon atoms and the hydroxymethyl group.
Claim 3
Dependent Claim
25 words
The composition of claim 1 wherein said lignin material is a lignosulfonate, and wherein said amount of organic sulfur is about 4 to 8 percent.
Claim 4
Dependent Claim
13 words
The composition of claim 1 wherein said lignin material is a methylolated derivative.
Claim 5
Dependent Claim
14 words
The composition of claim 1 wherein said lignin material comprises a spent sulfite liquor.
Claim 6
Dependent Claim
17 words
The composition of claim 4 wherein said liquor is desugared to a substantial extent, and is unpurified.
Claim 7
Dependent Claim
26 words
The composition of claim 1 wherein said lignin material is a sulfonated lignin, and wherein said amount of organic sulfur is about 2 to 7 percent.
Claim 8
Dependent Claim
26 words
The composition of claim 1 wherein said benzyl alcohol is monohydroxyl benzyl alcohol, present in an amount of at least 0.5 millimole per gram of lignin.
Claim 9
Dependent Claim
24 words
The composition of claim 7 wherein said adduct contains about 1.0 to 2.5 millimoles of said benzyl alcohol per gram of said lignin moiety.
Claim 10
Dependent Claim
152 words
In a method for the production of a lignin adduct, the steps comprising: forming an aqueous reaction mixture of a sulfonated lignin material and an hydroxyl benzyl alcohol compound, said mixture containing about 0.05 to 4.0 millimoles of said alcohol compound per gram of the lignin moiety in said lignin material, said alcohol compound having the general formula: ##STR3## wherein n is an integer from 1 to 3 and A is a substituent selected from the group consisting of hydrogen, alkyl groups containing 1-4 carbon atoms and the hydroxymethyl group; establishing in said mixture a temperature of about 50° to 100° Centigrade and a pH of about 3 to 12 to effect reaction between said lignin material and said alcohol compound; and maintaining those conditions in said mixture for a period of from about 1 to 24 hours to substantially convert said lignin material and said alcohol compound to a lignin adduct.
Claim 11
Dependent Claim
152 words
In a method for the production of a lignin adduct, the steps comprising: forming an aqueous reaction mixture of a sulfonated lignin material and an hydroxyl benzyl alcohol compound, said mixture containing about 0.05 to 4.0 millimoles of said alcohol compound per gram of the lignin moiety in said lignin material, said alcohol compound having the general formula: ##STR3## wherein n is an integer from 1 to 3 and A is a substituent selected from the group consisting of hydrogen, alkyl groups containing 1-4 carbon atoms and the hydroxymethyl group; establishing in said mixture a temperature of about 50° to 100° Centigrade and a pH of about 3 to 12 to effect reaction between said lignin material and said alcohol compound; and maintaining those conditions in said mixture for a period of from about 1 to 24 hours to substantially convert said lignin material and said alcohol compound to a lignin adduct.
Claim 12
Dependent Claim
14 words
The method of claim 9 wherein said lignin material is a spent sulfite liquor.
Claim 13
Dependent Claim
24 words
The method of claim 10 wherein said lignin material has been prereacted to effect methylolation of a substantial portion of the lignin-containing constituents thereof.
Claim 14
Dependent Claim
19 words
The method of claim 11 wherein said methylolation is effected by reaction of said spent sulfite liquor with formaldehyde.
Claim 15
Dependent Claim
16 words
The method of claim 10 wherein said spent sulfite liquor has been at least partially desugared.
Claim 16
Dependent Claim
11 words
The method of claim 9 wherein said lignin material is lignosulfonate.
Claim 17
Dependent Claim
27 words
The method of claim 9 wherein said lignin material is an alkali lignin sulfonated to an organic sulfur content of about 2 to 7 percent by weight.
Claim 18
Independent Claim
35 words
The method of any of claims 9, 10, 11, 12, 13, 14 or 15 wherein said alcohol compound is monohydroxyl benzyl alcohol, present in an amount of at least 0.5 millimole per gram of lignin.
Claim 19
Dependent Claim
31 words
The method of claim 9 wherein said alcohol compound is selected from the group consisting of dihydroxyl benzyl alcohol, trihydroxyl benzyl alcohol, monohydroxyl methyl benzyl alcohol, and monohydroxyl hydroxymethyl benzyl alcohol.
Claim 20
Dependent Claim
11 words
As a composition of matter, the lignin adduct of claim 16.
Claim 21
Dependent Claim
11 words
As a composition of matter, the lignin adduct of claim 17.
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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) | 1984-12-28 | 1985-06-29 | 1985-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-28 | 1989-06-29 | 1989-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-28 | 1993-06-29 | 1993-12-29 | $7700.00 | Window Closed / Lapsed |