Methylammonium bromide synthesis
- Product Name:Methylammonium bromide
- CAS Number:6876-37-5
- Molecular formula:CH6BrN
- Molecular Weight:111.969
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Yield:-
Reaction Conditions:
with ammonium bromide at 120 - 210;
Steps:
2
49.0 g (0.5 mol) of ammonium bromide powder of 0.05 mm was separately pulverized in a glass reactor,Further, 33 g (1.1 mol) of solid paraformaldehyde was pulverized to 0.1 mm. The solid powder was mixed uniformly,Heated to 120-180 ° C, the solid powder in the molten conditions for 3h,Further heated to 200-210 ° C to continue the reaction to no significant gas release,So that by-products and excessive decomposition of raw materials volatile. Cooling the reaction product,The resulting methyl ammonium bromide was dissolved at 60 ° C by adding 50 mL of a mixed solvent of ethanol and dibutyl ether in a mass ratio of 1: 2, and the insoluble impurities were filtered while hot. The methyl ammonium bromide solution was slowly cooled to -5-5 ° C,Precipitation of white methyl ammonium bromide crystallization, vacuum filtration, with a small amount of butanediol ether washing,The separated crystals were dried in vacuo at 80-100 ° C to give crystals of high purity white methyl ammonium bromide,The crystalline melting point was 293-296 ° C and the content was 99.2% by liquid chromatography.Hexamethylenetetramine content of 0.2%, methylamine content of 0.02%, formaldehyde content of 0.01%.
References:
CN106554285,2017,A Location in patent:Paragraph 0014
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