D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
9/36.3
D21C 11/00 (2006.01)
Patent
CA 1104765
PROCESS FOR RECOVERY OF CHEMICALS FROM PULPING WASTE LIQUOR Abstract of the Disclosure: A process for recovery of chemicals from a sodium sulfite pulping waste: liquor is disclosed in which a smelt obtained from the waste liquor is introduced into an aqueous slurry containing solidified smelt while make up water and a weak aqueous slurry are supplied to effect incompletely dissolving the smelt into the aqueous slurry to maintain the content of total solid and the temperature of the slurry at constant levels, the resulting aqueous slurry is subjected to a solid-liquid separation to obtain a wet cake having the molar ratio of S/Na20 substantially equal to that of the smelt, the wet cake is mixed with hot particles of sodium carbonate and sodium sulfite while hot air is supplied to effect oxidation of sodium sulfide in the wet cake to sodium sulfite and then the oxidized product is dissolved in aqueous medium and sulfur dioxide-containing gas, preferably the exhaust gas from the recovery boiler, is contacted with the resulting aqueous solution to convert sodium carbonate into sodium sulfite, whereby overall process is carried out in a closed system and the sulfur component and the sodium component present in the waste cooking liquor are recovered and regenerated into a cooking liquor.
273974
Mizuguchi Saburo
Naito Takeyuki
Nomura Isao
Onodera Masato
Saito Kouji
Ebara Corporation
George H. Riches And Associates
LandOfFree
Process for recovery of chemicals from pulping waste liquor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for recovery of chemicals from pulping waste liquor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for recovery of chemicals from pulping waste liquor will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-126119