METHOD OF PRODUCING ALKENES FROM OXYGENATES USING HETEROPOLY ACID CATALYSTS DEPOSITED ON SUPPORT Russian patent published in 2012 - IPC B01J35/10 C07C1/04 C07C2/06 C07C2/08 C07C1/24 C07C1/20 C07C11/02 C07C41/09 

FIELD: chemistry.

SUBSTANCE: invention relates to use of heteropoly acid catalysts for converting oxygenates to alkenes. Described is a method of producing an alkene (alkenes) from an oxygenate starting material through dehydration in a reactor in the presence of a heteropoly acid catalyst deposited on a support, characterised by that the specific pore volume thereof satisfies the following relationship: OP>0.6-0.3 [amount of heteropoly acid catalyst/surface area of dried catalyst], where OP denotes the specific pore volume of the dried heteropoly acid catalyst deposited on the support (given in ml/g catalyst); the amount of the heteropoly acid catalyst is the amount of heteropoly acid contained in the dried heteropoly acid catalyst deposited on the support (given in micromole/g); the surface area of the dried catalyst is the specific surface area of the dried heteropoly acid catalyst deposited on the support (given in m²/g). Described is a method of converting a hydrocarbon to an alkene (alkenes), involving the following successive steps: a) converting hydrocarbon starting material in a synthetic gas reactor into a mixture of carbon oxide (oxides) and hydrogen, b) converting said mixture of carbon oxide (oxides) and hydrogen from step a) in the presence of a powdered catalyst in a reactor at temperature ranging from 200 to 400°C and at pressure ranging from 50 to 200 bars into starting material containing at least one monoatomic aliphatic paraffin alcohol and/or the corresponding ether containing 2-5 carbon atoms, and c) continuing to realise the method as described above to obtain alkenes, owing to which the oxygenate starting material contains at least a portion of alcohol (alcohols) and/or ethers obtained at step b). Described is use of the heteropoly acid catalyst deposited on a support in the method of producing alkene (alkenes) from oxygenate starting material for increasing alkene selectivity and output while simultaneously preventing formation of alkanes, in the presence of the catalyst described above.

EFFECT: high efficiency of producing alkenes and low amount of alkanes formed.

20 cl, 7 tbl, 1 dwg, 19 ex