EP 1058713 A1 20001213 - 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
Application
Priority
- CA 9900155 W 19990222
- US 7554698 P 19980223
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
IPC 8 full level
C08L 95/00 (2006.01); C08L 97/00 (2006.01); D21C 11/00 (2006.01)
CPC (source: EP)
C08L 95/00 (2013.01); C08L 97/005 (2013.01); D21C 11/0007 (2013.01)
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
DOCDB simple family (publication)
WO 9942526 A1 19990826; AU 2606299 A 19990906; CA 2321735 A1 19990826; EP 1058713 A1 20001213
DOCDB simple family (application)
CA 9900155 W 19990222; AU 2606299 A 19990222; CA 2321735 A 19990222; EP 99906000 A 19990222