METHOD OF PRODUCING ACRYLIC ACID OR DERIVATIVES THEREOF Russian patent published in 2016 - IPC C07C57/04 C07C51/377 C07C51/48 C07C51/09 B01J27/16 B01J27/188 B01J27/195 B01J27/198 B01J27/186 B01J27/187 B01J27/25 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of producing acrylic acid, derivatives of acrylic acid or mixtures thereof, where the method, in particular, includes a step at which there is brought into contact a flow containing hydroxypropionic acid, hydroxypropionic acid derivatives or mixtures thereof, with a catalyst containing: a. anion monohydromonophosphate, which is described by formula (I): [HPO₄]^2- (I), b. and anions dihydromonophosphate, described by formula (II): [H₂PO₄]^- (II), and c. at least two different cations, while the catalyst is neutrally charged; additionally, the molar ratio of the said anion of monohydromonophosphate and the said anion of dihydromonophosphate in the specified catalyst is from 0.1 to 10.

EFFECT: methods for catalytic dehydration of hydroxypropionic acid, hydroxypropionic acid derivatives or mixtures thereof into acrylic acid, acrylic acid derivatives or mixture thereof are carried out with high output and selectivity and without significant conversion into undesirable by-products, such as acetaldehyde, propionic acid and acetic acid.

40 cl, 1 tbl, 3 ex