Purification of crude hexafluoroacetone containing nitrogen oxid

Details Purification of crude hexafluoroacetone containing nitrogen oxid Purification of crude hexafluoroacetone containing nitrogen oxid

1983-06-30

1984-09-25

Reamer, James H.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C07C 4580

Patent

active

044737122

ABSTRACT:
Crude hexafluoroacetone containing as impurities nitrogen oxides and sulfur dioxide is purified by admixing with water to form an aqueous solution, admixing the aqueous solution with concentrated sulfuric acid or oleum to form a vapor and scrubbing the vapor with liquid concentrated sulfuric acid to produce purified anhydrous hexafluoroacetone. The sulfur dioxide and nitrogen oxides interact with the aqueous solution and concentrated sulfuric acid so as not to be found in the purified product, thus obviating the need for a neutralization step.

REFERENCES:
patent: 3433838 (1969-03-01), Cunningham et al.
patent: 3544633 (1970-12-01), Yodis et al.
patent: 3745093 (1973-07-01), Lee
patent: 4337361 (1982-06-01), Anello et al.

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