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Alkali salts of aminocarboxylic acid - prepn from alkali cyanides formaldehyde and ammonia or amines esp nitrilotriacetic acid and ethy
Alkali salts of aminocarboxylic acid - prepn from alkali cyanides formaldehyde and ammonia or amines esp nitrilotriacetic acid and ethy
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机译:氨基羧酸的碱式盐-由碱金属氰化物,甲醛和氨或胺特别是次氮基三乙酸和乙醛制得
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摘要
Alkali salts of aminocarboxylic acids especially nitrilotriacetic and ethylenediamine-tetracetic acids are prepared by reaction of alkali cyanides, formaldehyde and ammonia or amines with continuous removal of ammonia produced in the reaction by blowing a O-contg. gas e.g. air through the reaction mixture at reduced press. of 200-500 mm. Hg. Comparison with the normal process shows a product of increased purity.
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