EP 0888476 A1 19990107 - PROCESS FOR EXTRACTING CHEMICALS AND ENERGY FROM CELLULOSE SPENT LIQUOR
Title (en)
PROCESS FOR EXTRACTING CHEMICALS AND ENERGY FROM CELLULOSE SPENT LIQUOR
Title (de)
VERFAHREN ZUR RÜCKGEWINNUNG VON CHEMIKALIEN UBD ENERGIE AUS DER ABLAUGE DER ZELLSTOFFHERSTELLUNG
Title (fr)
PROCEDE D'EXTRACTION DE PRODUITS CHIMIQUES ET D'ENERGIE DE LIQUEUR CELLULOSIQUE USEE
Publication
Application
Priority
- SE 9700452 W 19970319
- SE 9601099 A 19960322
Abstract (en)
[origin: WO9736043A1] Process for extracting chemicals and energy from black liquor which is obtained during the production of paper pulp by means of the chemical digestion of fibre raw material, in which the black liquor is gasified in a reactor at a pressure exceeding 5 bar, with the products formed principally consisting of CO, CO2, CH4, H2 and H2S in gas form and Na2CO3, NaOH and Na2S in the form of drops of smelt, and the resulting mixture of gas and smelt is cooled by means of direct contact with a water-containing liquid, in association with which the smelt drops are separated off and dissolved with the formation of green liquor, after which the gas is separated off for energy extraction. In the process, the said black liquor is supplied to the reactor at a dry substance content which exceeds 80 %. A major portion of the green liquor which is formed is causticized with an optimized, low consumption of lime.
IPC 1-7
IPC 8 full level
D21C 11/00 (2006.01); D21C 11/02 (2006.01); D21C 11/10 (2006.01); D21C 11/12 (2006.01)
CPC (source: EP)
D21C 11/0064 (2013.01); D21C 11/10 (2013.01); D21C 11/125 (2013.01); Y02P 40/40 (2015.11)
Citation (search report)
See references of WO 9736043A1
Designated contracting state (EPC)
AT DE ES FI FR PT
DOCDB simple family (publication)
WO 9736043 A1 19971002; BR 9708319 A 19990803; CA 2247815 A1 19971002; EP 0888476 A1 19990107; JP 2000507318 A 20000613; SE 9601099 D0 19960322; SE 9601099 L 19970923
DOCDB simple family (application)
SE 9700452 W 19970319; BR 9708319 A 19970319; CA 2247815 A 19970319; EP 97914715 A 19970319; JP 53431297 A 19970319; SE 9601099 A 19960322