Purification of anhydrous hydrogen fluoride
Patent
·
OSTI ID:6805335
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
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
CHEMICAL PREPARATION
DISTILLATION
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXY COMPOUNDS
INORGANIC ACIDS
METHANOL
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PEROXIDES
PERSULFURIC ACID
PURIFICATION
SEPARATION PROCESSES
SULFUR COMPOUNDS
SULFURIC ACID
SYNTHESIS
400201* -- Chemical & Physicochemical Properties
ALCOHOLS
CHEMICAL PREPARATION
DISTILLATION
HYDROFLUORIC ACID
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXY COMPOUNDS
INORGANIC ACIDS
METHANOL
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PEROXIDES
PERSULFURIC ACID
PURIFICATION
SEPARATION PROCESSES
SULFUR COMPOUNDS
SULFURIC ACID
SYNTHESIS