Production of thiocarbohydrazide

Details Production of thiocarbohydrazide Production of thiocarbohydrazide

1975-12-17

1979-10-23

Waltz, Thomas

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C15900

Patent

active

041720920

ABSTRACT:
In the production of thiocarbohydrazide wherein hydrazine is reacted with carbon disulfide in the presence of water and the reaction product is thereafter heated to evolve hydrogen sulfide, the improvement which comprises effecting the reaction with carbon disulfide in the presence of hydrogen sulfide, whereby the yield of thiocarbohydrazide is increased. At the end of the reaction, the thiocarbohydrazide is filtered off and the mother liquor, after a portion is concentrated and still containing hydrogen sulfide as well as excess hydrazine, is recycled to the next cycle as the source of hydrogen sulfide.

REFERENCES:
patent: 2726263 (1955-12-01), Audrieth et al.
patent: 3929877 (1975-12-01), Toth et al.
patent: 4132736 (1979-01-01), Cramm et al.

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