FIELD: organic chemistry. SUBSTANCE: method involves agglomeration of nitrogen-containing compounds taken from the following group: ammonium sulfate, triethylenediamine, ammonium chloride by addition to the latter compound of polyvinylpyrrolidone of the general formula (I) R1 or copolymer of vinylpyrrolidone and vinyl ester of the general formula (II) R6, where m and n - are whole number, at least 1; C1-C4 and R7 are independently H or C1-C2-alkyl; 
is 
-alkyl with average mol. mass 1000-10000 and polymerization degree of vinylpyrrolidone with relation to vinyl ester in copolymer of formula (II) 5/5-3/7. Polyvinylpyrrolidone or copolymer of vinylpyrrolidone and vinyl ester are added at quantity about 0.01-2 mas. p. per 100 mas. p. powder. EFFECT: improved method of agglomeration prevention. 3 tbl
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