Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1975-01-03
1976-02-10
Morgenstern, Norman
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260586G, C07C 4500
Patent
active
039377342
ABSTRACT:
A process for producing a relatively high yield of pure decachlorooctahydro-1,3,4-metheno-2H-cyclobuta(c,d)-pentalen-2-one (C.sub.10 Cl.sub.10 O) having high purity. In particular, the C.sub.10 Cl.sub.10 O is produced without formation of toxic waste streams by condensing two molecules of hexachlorocyclopentadiene with the aid of excess sulfur trioxide in the presence of a catalytic quantity of an antimony compound at a temperature within the range 95.degree.-120.degree.C. and at superatmospheric pressure to form a reaction product and hydrolyzing the reaction product. The hydrolysis is carried out in aqueous alkaline solution having a pH of at least about 9, and at a temperature within the range 85.degree.-115.degree.C. The resulting hydrolysis mixture is acidified to a pH 5-6, preferably 5.4-5.6, to precipitate crystalline product which is filtered, washed and dried. The product C.sub.10 Cl.sub.10 O is an effective insecticide with low toxicity to animals and human beings at prescribed dosages.
REFERENCES:
patent: 3333003 (1967-07-01), Du Bois
patent: R24435 (1958-02-01), Gilbert et al.
Hundtofte Virgil Anton
Moore William Percy
Allied Chemical Corporation
Kelly Fred L.
Morgenstern Norman
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