Patent · US Expired

Method of washing of alkaline pulp by adding carbon dioxide to the pulp

US5429717A · kind A · utility

24Cited by

3References

15Claims

0Family size

Assignee

Aga Aktiebolag · SE

Inventors

Monica Bokstrom · Kovland, SE
Raimo Rasimus · Lohja, FI

Key dates

Filing date	Jul 29, 1993
Grant date	Jul 4, 1995
Priority date	—
Expiry date	Jul 29, 2013

Classification

Technology area (CPC D)Textiles; Paper
CPC primaryD21C9/02
WIPO fieldTextile and paper machines
WIPO sectorMechanical engineering

Abstract

Method in the washing of alkaline, cellulosic pulp, for example sulphate pulp, CTMP and CMP pulp, the washing being effected in at least one stage. By an addition of carbon dioxide, there will be realized greatly reduced washing losses of, primarily, inorganic ions, as well as improved washing-out of substances which give rise to chemical oxygen demand (COD).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.