Method, applied in the production of tall oil, of preventing or

Details Method, applied in the production of tall oil, of preventing or Method, applied in the production of tall oil, of preventing or

1974-12-23

1977-01-25

Bashore, S. Leon

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

162 16, 162 29, C09F 100

Patent

active

040050602

ABSTRACT:
A method of preventing or reducing the emission of odorous sulphur compounds and/or sulphur combustion products from the black liquor recovery tall oil splitting processes in kraft pulping of pines is described. Sulphur dioxide and/or bisulphite is first reacted with black liquor sulphidic compounds occluded in the soap skimmings simultaneously with the soap acidulation by using a pressure vessel at a temperature of approximately 100.degree.-110.degree. C. Then the sulphite solution with the sulphur compounds thus obtained is separated and further utilized for stabilizing sulphides in various kraft pulping process liquors, preferably the black liquor. Alternatively, the sulphite solution can be passed through a neutral sulphite semichemical (NSSC) pulping arranged for spent liquor cross-recovery with the kraft process. The sulphur dioxide is substituted either for conventionally used acid chlorine dioxide reactor effluent or sulphuric acid. The process may regenerate sulphur dioxide for splitting.

REFERENCES:
patent: 2248978 (1941-07-01), Francisco
patent: 2296952 (1942-09-01), Ross et al.
patent: 2430029 (1947-11-01), Pollak et al.
patent: 2561150 (1951-07-01), Stephenson et al.
patent: 2611682 (1952-09-01), Mannbro
patent: 2734037 (1956-02-01), Mannbro
patent: 2738270 (1956-03-01), Nelson et al.
patent: 2801264 (1957-07-01), Thomsen
patent: 3366535 (1968-01-01), Cann
patent: 3575952 (1971-04-01), Morris et al.
patent: 3647363 (1972-03-01), Chari et al.

Affiliated with

Also associated with

Rating

Method, applied in the production of tall oil, of preventing or 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, applied in the production of tall oil, of preventing or , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method, applied in the production of tall oil, of preventing or will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1477996