Method and apparatus for the manufacture of N,N'-bis-(aroyl)hydr

Details Method and apparatus for the manufacture of N,N'-bis-(aroyl)hydr Method and apparatus for the manufacture of N,N'-bis-(aroyl)hydr

1983-03-10

1985-10-29

Warren, Charles F.

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

Organic compounds

Amino nitrogen containing

564149, 564150, C07C10206

Patent

active

045502048

ABSTRACT:
The invention relates to a method and apparatus for the manufacture of N,N'-bis-(aroyl)hydrazines from hydrazine and arylcarboxylic acid alkyl esters in the presence of catalysts. According to the invention, the reaction ingredients are reacted in a substantially stoichiometric mass ratio in an inert medium of low volatility which is liquid to wax-like under reaction conditions, in a suitable reactor equipped with a centrifugal disc and connected to a cycling, separating and draining-off system and a dispersion head to form a paste-like product. The paste-like compound can be used as a metal deactivator in polyolefin which is in direct contact with copper, for instance, in cable and wire insulation.

REFERENCES:
patent: 3110696 (1963-11-01), Dexter
patent: 3773830 (1973-11-01), Dexter
patent: 3849492 (1974-11-01), Brunetti et al.
patent: 3884874 (1975-05-01), Rosenberger et al.
patent: 3931103 (1976-01-01), Hardy
patent: 3993622 (1976-11-01), Brunetti
Kirk-Othmer Encyclopedia of Chem. Tech., 2nd ed., 1969, vol. 18, pp. 564-588.

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