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Title:
KRAFT PULPING PROCESS
Document Type and Number:
WIPO Patent Application WO/2013/068453
Kind Code:
A3
Abstract:
The present invention relates to a process for producing substantially pure hydrogen sulphide (H2S). The present invention also relates to a process for producing a new pre-treatment mixture, which is to be used in a pre-treatment step before cooking in processes for producing kraft pulp. The present invention also relates to a process for producing kraft pulp, said process comprising the above mentioned processes.

Inventors:
BRAGE HENRIC (SE)
RIBE ESPEN (SE)
BOGREN JOHANNES (SE)
Application Number:
PCT/EP2012/072120
Publication Date:
July 18, 2013
Filing Date:
November 08, 2012
Export Citation:
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Assignee:
SOEDRA CELL AB (SE)
International Classes:
D21C11/00; D21C11/04; D21C11/12
Domestic Patent References:
WO2004092478A12004-10-28
WO2000065150A12000-11-02
WO1997002383A11997-01-23
Foreign References:
US3560329A1971-02-02
CA923255A1973-03-27
US3520773A1970-07-14
US1633736A1927-06-28
EP0810321A11997-12-03
Attorney, Agent or Firm:
VALEA AB (Malmö, SE)
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