Chemistry: physical processes – Physical processes
Patent
1978-02-06
1980-11-18
Garris, Bradley R.
Chemistry: physical processes
Physical processes
23293A, 427213, 427215, 427422, 427424, 427427, 4273985, B01J 212, B01J 216, B05D 102
Patent
active
042343186
ABSTRACT:
A process for the production of granular sulfur in a rotating drum in which molten sulfur at a temperature within the range of about 110.degree. to 160.degree. C. is sprayed in a contact zone onto a bed of moving sulfur particles and a continuous curtain of said particles and resulting particles are passed to a cooling zone prior to discharge. A countercurrent flow of substantially inert cooling gas at a temperature in the range of about 10.degree. to 50.degree. C. and containing not more than 8% by volume oxygen is introduced to the cooling zone and a portion or all of said cooling gas is passed through the contact zone. The contact and cooling zones can be formed in a single rotating drum and separated from each other by a retaining ring or formed in separate vessels.
Discharge particles from the cooling zone are separated according to size and undersized particles are recycled as fines to the contact zone at a ratio of 4:1 to 2:1 of fines to product granules.
REFERENCES:
patent: 2629133 (1953-02-01), Morningstar et al.
patent: 3142862 (1964-08-01), Guldman
patent: 3231413 (1966-01-01), Berquin
patent: 3634046 (1972-01-01), Allen
patent: 3936534 (1976-02-01), Schallis
patent: 3991225 (1976-11-01), Blovin
Higgins John T.
Hildred Gordon C.
Cominco Ltd.
Delbridge Robert F.
Fors Arne I.
Garris Bradley R.
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