Patent · US Expired

Method for preparing ammonia and hydrogen chloride from ammonium chloride

US4305917A · kind A · utility

1Cited by

5References

7Claims

0Family size

Assignee

Chemische Werke Huels Aktiengesellschaft · US

Inventors

Alfred Coenen · Marl, DE
Kurt Kosswig · Marl, DE
Dieter Balzer · Haltern, DE

Key dates

Filing date	Sep 26, 1980
Grant date	Dec 15, 1981
Priority date	—
Expiry date	Sep 26, 2000

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01B7/055
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

According to the present invention, ammonia and hydrogen chloride are prepared from ammonium chloride. The steps of the process include: PA0 1. heating a mixture consisting essentially of PA1 (a) ammonium chloride, PA1 (b) a water-insoluble amine, and PA1 (c) an organic solvent; PA0 2. evacuating the ammonia released thereby; PA0 3. removing the polar solvent and any water remaining in the sump to the extent possible and/or required; and PA0 4. heating the residue containing a non-polar and/or a weakly polar solvent and removing the hydrogen chloride.

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