Distillation: processes – separatory – Distilling to separate or remove only water – From nitric acid
Patent
1980-06-30
1982-08-17
Sever, Frank
Distillation: processes, separatory
Distilling to separate or remove only water
From nitric acid
159DIG19, 203 73, 203 91, B01D 100, B01D 314
Patent
active
043448275
ABSTRACT:
Process for working up aqueous nitric acid which is of a concentration above the azeotropic concentration and contains organic compounds in solution for suspension wherein said nitric acid of a concentration about the azeotropic concentration is distilled off in one or more rectification steps until the azeotropic nitric acid is obtained. In the process, certain specified ratios of nitric acid and water to organic constituents must be maintained.
REFERENCES:
patent: 3479254 (1969-11-01), Miserlis
patent: 3928395 (1975-12-01), Seha et al.
Auge Wolfgang
Neeff Rutger
Thelen Bernd
Thiem Karl-Werner
Bayer Aktiengesellschaft
Sever Frank
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