Large scale batch process for diazomethane

Details Large scale batch process for diazomethane Large scale batch process for diazomethane

1997-11-13

1998-10-06

Powers, Fiona T.

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

Organic compounds

Diazo or diazonium

534558, C07C24516

Patent

active

058177787

ABSTRACT:
Diazomethane is prepared in a batch process on a scale of at least 50 gram-moles per batch, from an N-methyl-N-nitroso amine in an organic solvent and an inorganic base in an aqueous solution by the use of a phase transfer catalyst and by controlling the choice of solvent, reagent concentrations, addition rate and reaction temperature to cause codistillation of the product and the organic solvent in such a manner that the concentration of diazomethane in both liquid and vapor phases are controlled within limits that will prevent detonation of the diazomethane.

REFERENCES:
patent: 5459243 (1995-10-01), Acevedo et al.
T.H. Black Aldrichimica Acta, (1983) 16(1): 3-10.
Shiga et al., Chemical Abstracts, 109:162712 (1988).
Sekiya et al., Chemical Abstracts, 92:75896 (1980).

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