METHOD OF PRODUCING CELLULOSE MATERIAL CONTAINING GUANYLHYDRAZONE GROUP Russian patent published in 2011 - IPC C08B15/06 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing material based on a cellulose oxidation product used in production of reaction indicator paper or for concentrating heavy metals from solutions during analytical determination thereof. The cellulose material is treated with an equivalent amount of aminoguanidine carbonate in a chloride medium at temperature higher than 50°C. Treatment is carried out in the presence of 3 mol % diaminoguanidine hydrochloride. The cellulose material used is 2,3-dialdehyde cellulose. The optimum time for carrying out the process is 3 hours. The obtained material is then neutralised with caustic alkali to pH of the reaction mixture equal to 8-9.

EFFECT: method enables to obtain desired material in safe conditions in aqueous medium using readily available material, where the obtained cellulose material has good strength properties.

2 tbl, 1 ex, 1 dwg