Distillation: processes – thermolytic – And surface treating material to reduce or prevent...
Patent
1979-09-26
1981-05-19
Lutter, Frank W.
Distillation: processes, thermolytic
And surface treating material to reduce or prevent...
44 1SR, 48210, 201 17, 201 31, 201 42, C01B 5304, C10L 908, C10B 5700
Patent
active
042683580
ABSTRACT:
A method of reducing the sulfur content of coal, reduced to dust, by means of its own or external thermal energy and by means of rapid coking and/or rapid partial destructive distillation of the coal. The coal dust, which has been ground to less than 0.1 mm and, if necessary, preoxidized in 1 to 4 seconds at 350.degree. to 450.degree. C., is brought to a reaction temperature of 700.degree. to 1100.degree. C. This reaction temperature may be reached directly, either by means of carrier or heating gas heated to over 1000.degree. C., or by means of the partial combustion of the coal with air or oxygen, at heating rates greater than 20,000.degree. C./min. This reaction temperature may also be reached indirectly, at heating rates of less than 20,000.degree. C./min, by means of gaseous, liquid, or turbulent heating carriers. The coal dust is allowed to stand for 1 to 6 seconds at a pressure of 1 to 15 bar until the coke dust and gas which are produced separate from one another. The time the coal dust is allowed to stand is selected in conformity with the H.sub.2 S content in the resulting gas mixture at the end of this standing time, so that a shorter time is used if the H.sub.2 S content, at normal pressure, exceeds 0.3% by volume.
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L. & C. Steinmuller GmbH
Lutter Frank W.
Phillips Roger F.
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