EP 0823948 A1 19980218 - METHOD OF PRODUCING A PULP OF CELLULOSIC MATERIAL, THE PULP ITSELF AND THE USE THEREOF
Title (en)
METHOD OF PRODUCING A PULP OF CELLULOSIC MATERIAL, THE PULP ITSELF AND THE USE THEREOF
Title (de)
VERFAHREN ZUR HERSTELLUNG EINER PULPE AUS ZELLULOSEHALTIGEM MATERIAL, DIE PULPE SELBST UND DEREN VERWENDUNG
Title (fr)
PROCEDE DE PRODUCTION DE PULPE D'UN MATERIAU CELLULOSIQUE, PULPE OBTENUE ET SON UTILISATION
Publication
Application
Priority
- DE 19516151 A 19950503
- EP 9601823 W 19960502
Abstract (en)
[origin: US6183597B1] A process for producing a pulp from cellulose-containing material, wherein the material is reacted with formic acid as the solvent, and cooked at approximately the boiling temperature of the solvent, whereby return condensation is used. Annual plants, deciduous or coniferous wood can be used as the cellulose-containing material. In one variant of the process, the cellulose-containing material is only slightly warmed, whereby backflow cooling is used, and then a precisely predetermined quantity of hydrogen peroxide is slowly added to the liquid at a constant rate. This process variant can be repeated at a lower cooking temperature. The pulp thus obtained is preferably utilized in the production of cellulose, and in particular in the production of paper or cardboard. It is proposed that the lignin, which is isolated from the cellulose-containing material, have further applications, whereby such lignin is, after the pulp has been separated from the solvent, itself precipitated out in water. The lignin thus obtained can be used as a new building material, as a filler material or as an output substance to be used in the manufacture of aromatic products.
IPC 1-7
IPC 8 full level
C08H 6/00 (2010.01); C08H 7/00 (2011.01); D21C 3/00 (2006.01); D21C 3/04 (2006.01); D21H 11/12 (2006.01)
CPC (source: EP US)
D21C 3/003 (2013.01 - EP US); D21C 3/006 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FI FR GB GR IE IT LI NL PT SE
DOCDB simple family (publication)
US 6183597 B1 20010206; AT E215632 T1 20020415; CA 2217987 A1 19961107; CN 1098390 C 20030108; CN 1183126 A 19980527; DE 19516151 A1 19961107; DE 59609018 D1 20020508; DK 0823948 T3 20020729; EP 0823948 A1 19980218; EP 0823948 B1 20020403; ES 2175091 T3 20021116; JP 3059998 B2 20000704; JP H10511147 A 19981027; PT 823948 E 20020830; RU 2139965 C1 19991020; WO 9635013 A1 19961107
DOCDB simple family (application)
US 94534598 A 19981203; AT 96914167 T 19960502; CA 2217987 A 19960502; CN 96193631 A 19960502; DE 19516151 A 19950503; DE 59609018 T 19960502; DK 96914167 T 19960502; EP 9601823 W 19960502; EP 96914167 A 19960502; ES 96914167 T 19960502; JP 53300296 A 19960502; PT 96914167 T 19960502; RU 97120707 A 19960502