Global Patent Index - EP 1058713 A1

EP 1058713 A1 2000-12-13 - LIGNIN BASED COLLOIDAL COMPOSITIONS

Title (en)

LIGNIN BASED COLLOIDAL COMPOSITIONS

Title (de)

AUF LIGNIN BASIERENDE KOLLOIDZUSAMMENSETZUNGEN

Title (fr)

COMPOSITIONS COLLOIDALES A BASE DE LIGNINE

Publication

EP 1058713 A1 (EN)

Application

EP 99906000 A

Priority

  • CA 9900155 W
  • US 7554698 P

Abstract (en)

[origin: WO9942526A1] A lignin based colloidal dispersion into lubricating oil or bitumen is prepared from black liquor residue. In one process, in the first step, the black liquor is converted from its aqueous colloidal system to an anhydrous colloidal dispersion in a re-refined lubricating oil medium in which a surfactant, such as DDBSA (dodecylbenzene sulfuric acid), is used to promote the colloidal dispersion. In second step, bitumen is mixed with the product obtained from said first step. In another process, bitumen first is treated with an inorganic acid, such as sulfuric acid, at elevated temperature. The alkaline black liquor is then added slowly to the acid-treated bitumen under agitation for de-watering at a controlled rate to form a stable, substantially anhydrous, colloidal dispersion in the bitumen.

IPC 1-7 (main, further and additional classification)

C08L 95/00; D21C 11/00

IPC 8 full level (invention and additional information)

C08L 95/00 (2006.01); C08L 97/00 (2006.01); D21C 11/00 (2006.01)

CPC (invention and additional information)

C08L 95/00 (2013.01); C08L 97/005 (2013.01); D21C 11/0007 (2013.01)

Combination set (CPC)

  1. C08L 95/00 + C08L 2666/26
  2. C08L 97/005 + C08L 95/00

Citation (search report)

See references of WO 9942526A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 9942526 A1 19990826; AU 2606299 A 19990906; CA 2321735 A1 19990826; EP 1058713 A1 20001213

INPADOC legal status


2004-01-07 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20030617

2001-07-11 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20010525

2000-12-13 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20000913

2000-12-13 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE