Purification of anhydrous hydrogen fluoride

Patent · Tue Apr 11 00:00:00 EST 1978

OSTI ID:6805335

Jayawant, M D; Meadows, G W

A process is disclosed for preparing very high purity anhydrous hydrogen fluoride by contacting anhydrous hydrogen fluoride with at least 2.3% by weight of persulfuric acid based on the anhydrous hydrogen fluoride or at least 0.7% by weight of hydrogen peroxide based on the anhydrous hydrogen fluoride at ambient temperature and either at least 0.6% by weight of methanol based on the anhydrous hydrogen fluoride or at least one mole of sulfuric acid per mole of hydrogen peroxide at a temperature of from 0 to 75/sup 0/C and distilling the resulting mixture to recover very high anhydrous hydrogen fluoride.

• Assignee: E.I. du Pont de Nemours and Co.
• Patent Number(s): US 4083941
• OSTI ID: 6805335
• Resource Relation: Patent File Date: Filed date 18 Apr 1977
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HYDROFLUORIC ACID
PURIFICATION
CHEMICAL PREPARATION
DISTILLATION
HYDROGEN PEROXIDE
METHANOL
PERSULFURIC ACID
ALCOHOLS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PEROXIDES
SEPARATION PROCESSES
SULFUR COMPOUNDS
SULFURIC ACID
SYNTHESIS
400201* - Chemical & Physicochemical Properties