Cationic and anionic lignin amines

• US 4,775,744 A
• Filed: 07/23/1987
• Issued: 10/04/1988
• Est. Priority Date: 07/23/1987
• Status: Expired due to Term

• Current Assignee: Westvaco Corporation (Meadwestvaco Corporation)
• Original Assignee: Westvaco Corporation (Meadwestvaco Corporation)
• Inventors: Brown, Patti E., Schilling, Peter
• Primary Examiner(s): Nielsen, Earl
• Application Number:
  US07/076,948
• Time in Patent Office: 439 Days
• Field of Search: 530/501
• US Class Current: 530/501
• CPC Class Codes: C02F 1/5263 using natural chemical compounds
• CPC Class Codes: C02F 1/54 using organic material
• CPC Class Codes: C02F 11/147 using organic substances C02F11/148 takes precedence
• CPC Class Codes: C02F 5/12 containing nitrogen C02F5/14 takes precedence
• CPC Class Codes: C04B 2103/46 Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
• CPC Class Codes: C04B 24/121 Amines, polyamines
• CPC Class Codes: C04B 24/24 Macromolecular compounds C04B24/14 takes precedence; macromolecular compounds comprising sulfonate or sulfate groups C04B24/16
• CPC Class Codes: C08H 6/00 Macromolecular compounds derived from lignin, e.g. tannins, humic acids
• CPC Class Codes: C09K 8/46 containing inorganic binders, e.g. Portland cement
• CPC Class Codes: C09K 8/487 Fluid loss control additives; Additives for reducing or preventing circulation loss
• CPC Class Codes: C09K 8/528 inorganic depositions, e.g. sulfates or carbonates
• CPC Class Codes: C09K 8/90 of natural origin, e.g. polysaccharides, cellulose
• CPC Class Codes: C23F 11/14 Nitrogen-containing compounds
• CPC Class Codes: D21H 17/17 Ketenes, e.g. ketene dimers
• CPC Class Codes: D21H 17/23 Lignins
• CPC Class Codes: D21H 17/66 Salts, e.g. alums

Abstract

Lignin amines are disclosed which are characterized by high nitrogen content and are water soluble at both alkaline and acidic pH values. The lignin amines have utility as flocculants, filtration aids, precipitants, scale inhibitors, asphalt emulsifiers, fluid loss additives, oil well cement additives, corrosion inhibitors, retention aids, cationic dispersants, and tall oil pitch emulsifiers.

Claims

1. An improved lignin derivative consisting essentially of the reaction product of lignin with an aldehyde, or an aldehyde-producing substance, and a polyamine wherein said lignin derivative is water soluble at alkaline and acidic pH values.

2. The improved lignin derivative of claim 1 wherein the starting lignin material is selected from the group consisting of lignin substantially free from sulfonic acid groups and lignin containing a significant amount of sulfonic acid groups.

3. The improved lignin derivative of claim 2 wherein the lignin substantially free from sulfonic acid groups is selected from the group consisting of kraft lignin, the low molecular weight lignin by-product of vanillin production, and desulfonated sulfite pulping process lignosulfonic acids.

4. The improved lignin derivative of claim 2 wherein the lignin containing a significant amount of sulfonic acid groups is selected from the group consisting of lignosulfonic acids.

5. The improved lignin derivative of claim 4 wherein the lignosulfonic acids are selected from the group consisting of lignosulfonic acids isolated from spent sulfite pulping liquors and sulfonated kraft lignin.

6. The improved lignin derivative of claim 5 wherein the sulfonated kraft lignin is prepared by high temperature sulfonation.

7. The improved lignin derivative of claim 5 wherein the sulfonated kraft lignin is prepared by oxidative sulfonation at ambient temperature.

8. The improved lignin derivative of claim 5 wherein the sulfonated kraft lignin is prepared by sulfomethylation.

9. The improved lignin derivative of claim 3 wherein the lignin is kraft lignin selected from the group consisting of hardwood lignin and softwood lignin.

10. The improved lignin derivative of claim 9 wherein the kraft lignin is pretreated by demethylation.

11. The improved lignin derivative of claim 1 wherein said lignin derivative is an ion selected from the group consisting of cation and anion.