Method for purifying process water from pulp manufacture

Details Method for purifying process water from pulp manufacture Method for purifying process water from pulp manufacture

1994-02-02

1995-08-01

McCarthy, Neil

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210724, 210774, 210928, 159 473, 162 42, 162 45, C02F 156, B01D 100

Patent

active

054377919

ABSTRACT:
Process water from pulp manufacture is purified in a separator device by mechanical or a combination of mechanical and chemical methods and is thereafter evaporated, at least part of the concentrate resulting from the evaporation being recycled and mixed with the process water fed into the separator device. In a preferred embodiment, a precipitant is added to the mixed water comprising the process water and the concentrate. The part of the concentrate not recycled and mixed with the process water is supplied, optionally after further evaporation, with an acid to a pH of 1-5, whereupon resulting flocs and precipitates are removed in a separator device.

REFERENCES:
patent: 2218053 (1940-10-01), Schwabe
patent: 2897148 (1959-07-01), Laboureur
patent: 3141816 (1964-07-01), Manley
patent: 3745063 (1973-07-01), Fisher
patent: 4718978 (1988-01-01), Spannuth et al.
patent: 5174859 (1992-12-01), Rittof et al.
patent: 5230808 (1993-07-01), Chung et al.

Affiliated with

Also associated with

Rating

Method for purifying process water from pulp manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for purifying process water from pulp manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for purifying process water from pulp manufacture will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-732245