METHODS USING SSZ-95 MOLECULAR SIEVE Russian patent published in 2022 - IPC C01B39/02 C01B39/46 B01J29/70 B01D53/22 B01D53/94 C07C211/04 C07C1/20 C10G49/08 C10G3/00 C10G11/05 

FIELD: chemistry.

SUBSTANCE: invention relates to a method for conversion of hydrocarbons, a method for production of light olefins, a method for production of methylamine or dimethylamine, a method for separation of gases, a method for processing of exhaust gases of an engine, a method for reduction of nitrogen oxides. In all methods, a molecular sieve is used. The method for conversion of hydrocarbons includes contact of hydrocarbon raw materials, under conditions of conversion of hydrocarbons, with a catalyst, which contains a molecular sieve. This molecular sieve has a frame structure of MTT type, the molar ratio of silicon oxide to aluminum oxide from 20 to 70, the total volume of micropores between 0.005 and 0.02 cm³/g. Moreover, the molecular sieve containing a structure-forming agent having the ratio of silicon to aluminum from 20 to 70 is obtained by the following method. The molecular sieve is subjected to a stage of pre-calcination at a temperature lower than a temperature of complete decomposition of the structure-forming agent for a time sufficient to convert at least part of the structure-forming agent into a decomposition residue. The pre-calcined molecular sieve is subjected to ion exchange to remove extra-mesh cations. Then, the molecular sieve is subjected to a stage of additional calcination at a temperature lower than the temperature of complete decomposition of the structure-forming agent for a time sufficient to convert at least part of the structure-forming agent into a decomposition residue. The molecular sieve, after additional calcination, has conscious weight loss (hereinafter – CWL) of 0<CWL≤10 wt.%.

EFFECT: obtainment of a new SSZ-95 molecular sieve with improved selectivity and smaller gas output compared to usual SSZ-32x materials.

12 cl, 11 tbl, 29 ex