EP 0251533 A1 19880107 - Alkaline black liquor treatment.
Title (en)
Alkaline black liquor treatment.
Title (de)
Behandlung einer alkalischen Schwarzlauge.
Title (fr)
Traitement d'une liqueur noire alcaline.
Publication
Application
Priority
US 87715686 A 19860623
Abstract (en)
The capacity of a chemical recovery plant for alkaline black pulping liquors is increased by diverting a portion (38) of the black liquors (1) to a wet oxidation step (39). Organic material is oxidized and water is evaporated. The resulting oxidized black liquor (42) is combined with unoxidized black liquor (43) to produce a black liquor mixture (44,50) of reduced volume and a higher ratio of pulping chemicals to organic matter. The liquor mixture (50) is burned in a recovery furnace (52) at an increased rate.
IPC 1-7
IPC 8 full level
D21C 11/14 (2006.01)
CPC (source: EP)
D21C 11/14 (2013.01)
Citation (search report)
- [X] WO 8504202 A1 19850926 - SPANNUTH ROBERT J, et al
- [AD] US 3714911 A 19730206 - PRADT L
- [X] TAPPI JOURNAL, vol. 67, no. 11, November 1984, pages 52-58, Atlanta, Georgia, US; T.M. GRACE: "Increasing recovery boiler throughput"
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0251533 A1 19880107; AU 7361687 A 19871224; BR 8703602 A 19880823; FI 872751 A0 19870622; FI 872751 A 19871224; NO 872605 D0 19870622
DOCDB simple family (application)
EP 87305198 A 19870612; AU 7361687 A 19870528; BR 8703602 A 19870623; FI 872751 A 19870622; NO 872605 A 19870622