Purification of chloroform

Details Purification of chloroform Purification of chloroform

1988-11-04

1990-05-01

Mars, Howard T.

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

Organic compounds

Halogen containing

570262, C07L 1738

Patent

active

049220446

ABSTRACT:
Industrial grade chloroform is purified to remove traces of cis-1,2-dichloroethylene, bromochloromethane, and amylenes by a two-step process. The chloroform is first treated by contacting with aqueous sulfuric acid to remove amylenes and thereafter passed over a zeolite having an average pore size of 3 to 6 Angstroms and a Si/Al atomic ratio in the range of about 1.6/1 to 3/1, preferably calcium chabazite, to remove cis-1,2-dichloroethylene and bromochloromethane.

REFERENCES:
patent: 1825814 (1931-10-01), Norris
patent: 2024095 (1935-12-01), Daudt et al.
patent: 2178695 (1938-04-01), Muskat et al.
patent: 2829180 (1958-04-01), Montgomery et al.
patent: 3215747 (1965-11-01), Fainberg et al.
patent: 3218364 (1965-11-01), Kometani et al.
patent: 3804910 (1974-04-01), Furrow
Allied Chemical Corporation Proposal, Letters from Union Carbide and Vulcan Materials Company, 1971.

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