Process for preparing hydrogen fluoride in a rotary tube furnace
AssigneeBayer Aktiengesellschaft
InventorsAndreas Bulan, Klaus Esch, Peter Strabel
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Abstract
The invention relates to a novel process for preparing hydrogen fluoride in a uniformly high conversion at a high space-time yield with minimal energy consumption by reaction of fluorspar with sulfuric acid in a rotary tube furnace, in which the furnace is divided into three equal-sized zones, each of which is heated indirectly by means of from 1 to 12 independent combustion chambers, there being a temperature gradient between the zones such that the first zone has the highest temperature and the third zone has the lowest temperature.
Claims8
A process for preparing hydrogen fluoride comprising reacting fluorspar with sulfuric acid in a rotary tube furnace that is divided in the longitudinal direction into three equal-sized zones, wherein
- (1) a first zone comprises the first third of the furnace and is fitted with an inlet opening for the starting materials,
- (2) a second zone comprises the middle section of the furnace, and
- (3) a third zone comprises the last third of the furnace and is fitted with an outlet opening for products,
- wherein each zone is heated indirectly using from 1 to 12 independent combustion chambers to provide a temperature gradient between the zones such that the first zone has the highest temperature and the third zone has the lowest temperature.
Dependencies are inferred from the claim text.