Process for preparing hydrogen fluoride in a rotary tube furnace

US6699455B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Andreas Bulan · Langenfeld, DE
• Klaus Esch · Leverkusen, DE
• Peter Strabel · Essen, DE

Key dates

• Filing date: Jun 26, 2001
• Grant date: Mar 2, 2004
• Expiry date: Aug 15, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01B7/192
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

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.