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Method for catalyzing selective hydrogenation of 1,3-butadiene by using CuPdPt catalyst

A catalyst and butadiene technology, which is applied in the direction of catalyst activation/preparation, catalyst, carbon compound catalyst, etc., can solve the problems of insufficient selectivity and stability, existing gaps, etc., and achieve the effect of improved catalytic activity and mild reaction

Inactive Publication Date: 2019-12-13
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Qilu Institute also developed the QSH-01 selective hydrogenation catalyst, which was successfully applied to the raw material pretreatment process of alkylate oil. Compared with foreign technologies, the selectivity and stability are still slightly insufficient, and there is a gap

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Catalyst preparation process

[0026] Weigh 1mmol Ti 3 AlC 2 Placed in 40wt% HF solution for 4.5 hours, washed with water and freeze-dried to obtain Ti 3 C 2 ; Add 1mmol Ti 3 C 2 Put 8mmol melamine in 40mL deionized water, ultrasonically disperse for a period of time, place it at a certain temperature and stir until dry, and the drying temperature is 80°C to obtain Ti 3 C 2 @melamine; Will Ti 3 C 2 @Melamine is placed in a tube furnace, roasted at 490°C for 7.0h under 2.4% oxygen / nitrogen atmosphere, and TiO is obtained after roasting 2 @C / g-C 3 N 4 ; Weigh 15mmol TiO 2 @C / g-C 3 N 4 , placed in a solution containing 1mmol copper nitrate, 0.2mmol palladium chloride and 0.02mmol chloroplatinic acid, and reduced with 0.1mol / L ammonia borane solution at -3°C for 6.5h to obtain a catalyst, which is denoted as CuPd 0.2 Pt 0.02 / 15TiO 2 @C / g-C 3 N 4 Catalyst, sealed and stored.

[0027] Hydrogenation process

[0028] First, 1.5 mL of the prepared catalyst w...

Embodiment 2

[0031] Catalyst preparation process

[0032] Weigh 1mmol Ti 3 AlC 2 Placed in 70wt% HF solution for 9.0 hours, washed with water and freeze-dried to obtain Ti 3 C 2 ; Add 1mmol Ti 3 C 2 Put 14mmol melamine in 40mL deionized water, ultrasonically disperse for a period of time, place it at a certain temperature and stir until dry, and the drying temperature is 115°C to obtain Ti 3 C 2 @melamine; Will Ti 3 C 2 @Melamine is placed in a tube furnace, roasted at 535°C for 3.5h under 2.1% oxygen / nitrogen atmosphere, and TiO is obtained after roasting 2 @C / g-C 3 N 4 ; Weigh 22mmolTiO 2 @C / g-C 3 N 4 , placed in a solution containing 1mmol copper nitrate, 0.4mmol palladium chloride and 0.05mmol chloroplatinic acid, and reduced with 0.4mol / L ammonia borane solution at 5°C for 3.0h to obtain a catalyst, which is denoted as CuPd 0.4 Pt 0.05 / 22TiO 2 @C / g-C 3 N 4 Catalyst, sealed and stored.

[0033] Hydrogenation process

[0034] First, 1.5 mL of the prepared catalyst w...

Embodiment 3

[0037] Catalyst preparation process

[0038] Weigh 1mmol Ti 3 AlC 2 Placed in 60wt% HF solution for 8.0 hours, washed with water and freeze-dried to obtain Ti 3 C 2 ; Add 1mmol Ti 3 C 2 Put 12mmol melamine in 40mL deionized water, ultrasonically disperse for a period of time, place it at a certain temperature and stir until dry, and the drying temperature is 105°C to obtain Ti 3 C 2 @melamine; Will Ti 3 C 2 @Melamine is placed in a tube furnace, roasted at 525°C for 4.5h under 1.8% oxygen / nitrogen atmosphere, and TiO is obtained after roasting 2 @C / g-C 3 N 4 ; Weigh 20mmolTiO 2 @C / g-C 3 N 4 , placed in a solution containing 1mmol copper nitrate, 0.3mmol palladium chloride and 0.02mmol chloroplatinic acid, and reduced with 0.3mol / L ammonia borane solution at 4°C for 4.0h to obtain a catalyst, which is denoted as CuPd 0.3 Pt 0.02 / 20TiO 2 @C / g-C 3 N 4 Catalyst, sealed and stored.

[0039] Hydrogenation process

[0040] First, 1.5 mL of the prepared catalyst w...

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Abstract

The invention discloses a method for catalyzing selective hydrogenation of 1,3-butadiene by using a CuPdPt catalyst, and belongs to the technical field of chemistry and chemical engineering. The method comprises the following steps: putting the CuPdPt catalyst into a tubular reactor, then raising the temperature of a catalyst bed to a certain temperature, then introducing a mixed gas of 1,3-butadiene and hydrogen into the reactor, adjusting the reaction conditions to a certain pressure and a certain airspeed, and carrying out a reaction. The CuPdPt catalyst is different from traditional supported catalysts, and is characterized in that the high-activity and high-stability supported CuPdPt catalyst for selective hydrogenation of 1,3-butadiene is prepared by adjusting the contents of metallic copper, palladium and platinum in the catalyst and the content of TiO2@C. When the catalyst is used for the selective hydrogenation reaction of 1,3-butadiene, the content of 1,3-butadiene in the product is lower than 670 ppb, and the content of butane is lower than 1.5%;and the catalyst still maintains a good catalytic activity after being continuously operated for 150 h.

Description

technical field [0001] The invention belongs to the technical field of chemistry and chemical engineering, in particular to a CuPdPt / TiO 2 @C / g-C 3 N 4 The catalyst catalyzes a process for the selective hydrogenation of 1,3-butadiene. Background technique [0002] 1,3-Butadiene, also known as butadiene or vinyl ethylene, English name 1,3-Butadiene, molecular formula C 4 h 6 , the structural formula is CH 2 =CH-CH=CH 2 , molecular weight 54.09. Butadiene is a colorless gas at room temperature, with a moderately sweet aromatic taste and a slight garlic smell. Melting point -108.9°C, boiling point -4.5°C, relative density 0.62 (water=l), slightly soluble in water and alcohol, easily soluble in benzene, toluene, ether, chloroform, carbon tetrachloride, gasoline, anhydrous acetonitrile, dimethyl Dimethyl formamide, dimethylacetamide, N-methylpyrrolidone, furfural, dimethyl sulfoxide, easy to liquefy, flammable, easy to polymerize. [0003] While producing ethylene and pr...

Claims

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Application Information

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IPC IPC(8): C07C5/05C07C11/08B01J27/24B01J37/16
CPCB01J27/24B01J37/16C07C5/05C07C2527/24C07C11/08
Inventor 万超吴胜华王嘉佩孙林许立信张代林
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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