Patent · US Expired

Rotating apparatus for manufacturing hydrogen fluoride

US4362701A · kind A · utility

4Cited by

7References

7Claims

0Family size

Assignee

Vereinigte Aluminum - Werke Aktiengesellschaft · DE

Inventors

Jorg Kruger · Krefeld, DE
Roland Thome · Bonn, DE
Dieter Moritz · Grafenau, DE
Hubert Bings · Grafenau, DE
Herbert Losert · Grafenau, DE

Key dates

Filing date	Mar 27, 1981
Grant date	Dec 7, 1982
Priority date	—
Expiry date	Mar 27, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/129
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A process for extracting hydrogen fluoride from fluorine containing materials includes countercurrently contacting the materials with steam having a plane of rotation relatively perpendicular to the direction of flow of the material. An apparatus for the extraction of hydrogen fluoride from fluorine containing materials includes a rotary kiln having a first zone wherein a steam-air mixture countercurrently contacts the materials in an oxidation step, a second zone wherein an oxygen containing gas is tangentially injected into the kiln to provide complete combustion of carbon containing materials, a third zone wherein a steam stream countercurrently contacts the materials in a reducing step and means for providing a plane of rotation to the steam which is relatively perpendicular to the direction of flow of the material.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.