CATALYST FOR LIQUID-PHASE SYNTHESIS OF METHANOL AND A METHOD FOR PRODUCTION THEREOF Russian patent published in 2019 - IPC B01J23/06 B01J31/06 B01J32/00 B01J37/18 C07C31/04 

FIELD: technological processes.

SUBSTANCE: invention relates to production of heterogeneous catalysts for liquid-phase synthesis of methanol. Catalyst for liquid-phase synthesis of methanol contains a carrier and zinc as an active component. According to the invention, the support used is a super-cross-linked polystyrene with a cross-linking degree of 195–205 %, wherein content of zinc in catalyst is from 2 to 4 wt%, and content of super-cross-linked polystyrene is 96–98 wt%. Super-cross-linked polystyrene with functional tertiary amine groups, particle size 5–7 mcm, exchange capacity 0.5 mole/l, moisture content 55÷62 %, degree of swelling of ±5 %, relative density of 1.04 g/ml, inner surface area of 900÷1,100 m²/g and granule size of 5–7 mcm. Method of producing a catalyst for liquid phase synthesis of methanol involves treatment of the support with a zinc salt solution, drying for 1 hour, washing with distilled water, drying and reduction with hydrogen for 2 hours. According to the invention, as zinc salt solution a zinc acetate solution with concentration of 2.8–2.9 wt% is used in tetrahydrofuran, distilled water and methanol, prepared under nitrogen flow, treatment of support with zinc acetate solution is carried out for 10±0.5 minutes, after which catalyst is dried at 75±5 °C for 1±0.05 hours, washed with distilled water with pH=6.4–7.0, dried again at 75±5 °C for 1±0.05 hours, placed in a tubular furnace, purged with nitrogen at rate of 30±5 ml/min for 30±5 minutes, is purged with hydrogen at rate of 30±5 ml/min for 30±5 minutes, reduced with hydrogen at 300±10 °C at rate of 30±5 ml/min for 2±0.1 hours, cooled to room temperature and purged with nitrogen at rate of 30±5 ml/min for 30±5 minutes. Super-cross-linked polystyrene is pre-treated with acetone, washed with distilled water and dried under vacuum for 24 hours.

EFFECT: high activity, selectivity and operational stability of the heterogeneous catalyst in the reaction of liquid phase synthesis of methanol owing to use of an inert polymer support with a large surface area and high availability of the active metal (zinc).

4 cl, 23 ex