CATALYST FOR PRODUCING BIO-BASED ACRYLIC ACID AND ITS DERIVATIVES AND THE METHOD FOR MAKING THEREOF Russian patent published in 2018 - IPC B01J37/04 B01J27/18 B01J37/08 B01J37/10 C07C57/04 C07C51/377 C07C57/55 

FIELD: chemistry.

SUBSTANCE: present invention relates to a catalyst for the production of acrylic acid based on a biological feed comprising phosphate anions and at least one monovalent cation and at least one multivalent cation. Process for the preparation of a catalyst is also provided. Lactic acid, lactic acid derivatives or mixtures thereof are dehydrated by a catalyst in a process for the production of acrylic acid, acrylic acid derivatives or mixtures thereof based on biological raw materials. In particular, the invention relates to a catalyst for the conversion of lactic acid, lactic acid derivatives or mixtures thereof to acrylic acid, acrylic acid derivatives or mixtures thereof comprising (a) phosphate anions described by formulas (Ic) and (IIc), (b) to at least two different cations, wherein the catalyst is neutrally charged, and β and γ greater than or equal to 0 and less than or equal to 1, wherein n is at least 2, wherein the molar ratio of said phosphate anions in said catalyst is from about 0.1 to about 10, said at least two different cation include at least one monovalent cation and at least one multivalent cation, and wherein said multivalent cation is selected from the group consisting of metal cations Be, Mg, Ca, Sr, Ba and their mixtures. [H_(2-2γ)PO_(4-γ)]^(1+(n-1)γ)-_(1+(n-1)γ) (IIc), and [H_(1-β)P_(1+β)O_(4+3β)]^2(1+β)- (Ic).

EFFECT: catalyst allows to obtain products with high yield, selectivity and efficiency.

14 cl, 7 ex