METHOD OF PRODUCING ZWITTERIONIC ACRYLATE- AND METHACRYLATE AMINOGUANIDINES Russian patent published in 2012 - IPC C07C277/08 C07C279/00 C07C69/54 

FIELD: chemistry.

SUBSTANCE: invention relates to an improved method of producing water-soluble zwitterionic (cationotropic) aminoguanidine acrylates which can be used as flocculants in chemical and petrochemical industry and other large-scale production. The obtained compounds can also be used to treat industrial recycled and waste water, in ultrafiltration of enzymes, to deposit polymer latex, stabilise suspensions, food liquids and in production of nanocomposite materials. The compounds have a wide range of biocidal action. The disclosed method involves adding an equimolar amount (with respect to aminoguanidine) of acrylic or methacrylic acid at room temperature in a nitrogen current to a 10% suspension of aminoguanidine carbonate or aminoguanidine bicarbonate in methanol or ethanol and depositing the reaction product after half an hour in diethyl ether.

EFFECT: disclosed method is realised in a single step, does not include fire-hazardous steps of preparing substances such as sodium ethylate, simplifies and cuts the duration of synthesis and extraction of the product, does not require low temperatures and additional purification steps, since carbonic acid formed during the reaction is decomposed to carbon dioxide which is removed from the reaction zone with the nitrogen current.

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