Method for recovery of reusable chemicals from C10.sub.2 generat

Details Method for recovery of reusable chemicals from C10.sub.2 generat Method for recovery of reusable chemicals from C10.sub.2 generat

1983-08-03

1984-11-20

Smith, William

Concentrating evaporators

Processes

Involving waste liquid

423551, 23302T, 162 29, B01P 100

Patent

active

044837402

ABSTRACT:
Method for the recovery of acidic effluent from pulp mill chlorine dioxide generators using the Mathieson or Solvay system. The spent generator acid is directed through a three-stage evaporation/crystallization process in which spent acid from the generator is evaporated and crystallized to produce stage 1 sodium bisulfate crystals. The first stage crystals are then redissolved to form a second solution which is crystallized in order to yield stage 2 sodium sesquisulfate crystals and, finally, the second stage crystals are redissolved in a third stage evaporation/crystallization stage to yield sodium sulfate crystals. Besides salt cake, the system also produces reusable sulfuric acid for the chlorine dioxide generator. No chemicals are added during the recovery steps.

REFERENCES:
patent: 2970890 (1961-02-01), James
patent: 3446584 (1969-05-01), Fuller
patent: 4245998 (1981-01-01), Okouchi et al.
patent: 4329199 (1982-05-01), Anderson et al.

Affiliated with

Also associated with

Rating

Method for recovery of reusable chemicals from C10.sub.2 generat 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 recovery of reusable chemicals from C10.sub.2 generat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for recovery of reusable chemicals from C10.sub.2 generat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2188189