Synthetic process for the preparation of N,N dimethyl glycine (D

Details Synthetic process for the preparation of N,N dimethyl glycine (D Synthetic process for the preparation of N,N dimethyl glycine (D

1989-08-16

1990-11-06

Shippen, Michael L.

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

Organic compounds

Carboxylic acids and salts thereof

C07C22900

Patent

active

049688391

ABSTRACT:
A process for synthetically producing N,N-Dimethyl Glycine, commonly referred to as DMG, through the neutralization of N,N-dimethyl glycine sodium salt with sulfuric acid wherein the N,N-dimethyl glycine sodium salt is prepared by reacting formaldehyde, sodium bisulfite, dimethyl amine, and sodium cyanide followed by agitation with caustic soda beads. Through the preparation and intermediate steam distillation and isolation of N,N-Dimethylamino acetonitrile. The nitrile solution is subjected to caustic hydrolysis then is subsequently neutralized leaving DMG in methanol extraction solvent. The methanol is removed in an azeotropic distillation step to produce DMG in a high yield, low cost and excellent quality.

REFERENCES:
patent: 2479942 (1949-08-01), Lecher et al.
patent: 3714223 (1973-01-01), Godfrey et al.

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