Composite solid acid catalyst and preparation method thereof

A composite solid acid and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems that cannot reach the order of magnitude of liquid acid, achieve catalytic activity and selectivity, and high catalytic performance Activity and selectivity, effect of uniform acid strength distribution

Inactive Publication Date: 2011-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the limitation of their structure, the density of acid centers of solid acids is generally about two orders of magnitude lower than that of liquid acids. The density of acid centers of almost all solid acid catalytic materials prepared by the existing technology cannot reach that of liquid acids. Magnitude

Method used

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  • Composite solid acid catalyst and preparation method thereof
  • Composite solid acid catalyst and preparation method thereof
  • Composite solid acid catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Weigh 22.81 grams of phosphotungstic acid (H 3 PW 12 o 40 .21H 2 O) Dissolve in 135.0ml deionized water to make phosphotungstic acid solution. 60.3 grams of 20-40 mesh SiO 2 Put it into a suction filter bottle, treat it at 0.095 MPa vacuum and 75°C for 1.0 hour, cool down to room temperature, add the prepared phosphotungstic acid solution under the condition of maintaining vacuum, soak for 1.5 hours, and then put it in a drying box for 60 °C for 3 hours to obtain 25% by weight H 3 PW 12 o 40 And 75% heavy silica gel supported heteropolyacid material, denoted as 25%HPW / SiO 2 .

[0052] Weigh out 2.85 g of C S2 CO 3 Dissolved in 120.0ml of ionized water, dubbed C S2 CO 3 aqueous solution. The above 25%HPW / SiO 2 Put it into a suction filter bottle, treat it at 0.095 MPa vacuum and 55°C for 1.0 hour, cool down to room temperature, and add the prepared C under the condition of maintaining vacuum S2 CO 3 solution, the reaction proceeds according to formula (1)...

Embodiment 2

[0058] Weigh 25.4 grams of phosphotungstic acid (H 3 PW 12 o 40 .21H 2 O) dissolved in 150.0ml deionized water, dubbed H 3 PWO 40 solution. 67.1 grams of 20-40 mesh SiO 2 Put it into a suction filter bottle, treat it at 0.095 MPa vacuum and 75°C for 1.0 hour, cool down to room temperature, and add the prepared H 3 PW 12 o 40 solution, impregnated for 1.5 hours, and then dried in a drying oven at 60°C for 3 hours to obtain a solution containing 25% by weight H 3 PW 12 o 40 And 75% heavy silica gel supported heteropolyacid material, denoted as 25%HPW / SiO 2 .

[0059] Weigh out 1.61 g of K 2 CO 3 Dissolve in 145.0ml ionized water and make K 2 CO 3 aqueous solution. The above 25%HPW / SiO 2 Put it into a suction filter bottle, treat it at 0.095 MPa vacuum and 55°C for 1.0 hour, cool down to room temperature, and add the prepared K under the condition of maintaining vacuum 2 CO 3 solution, the reaction proceeds according to formula (1) (where M is K, x=3.0). Imme...

Embodiment 3

[0063] Weigh 17.1 grams of phosphomolybdic acid (H 3 PMo 12 o 40 .17H 2 O) dissolved in 100.0ml deionized water, dubbed H 3 PWO 40 solution. 44.0 grams of 20-40 mesh Al 2 o 3 Put it into a suction filter bottle, treat it at 0.095 MPa vacuum and 75°C for 1.0 hour, cool down to room temperature, and add the prepared H 3PW 12 o 40 solution, impregnated for 1.5 hours, and then dried in a drying oven at 60°C for 2.0 hours to obtain a solution containing 25% by weight H 3 PMo 12 o 40 And 75% heavy alumina loaded heteropolyacid, denoted as 25% HPMo / Al 2 o 3 .

[0064] Weigh out 3.26 g of C S2 CO 3 Dissolve in 97.0ml ionized water, make C S2 CO 3 aqueous solution. The above 25% HPMo / SiO 2 Put it into a suction filter bottle, treat it at 0.095 MPa vacuum and 55°C for 1.0 hour, cool down to room temperature, and add the prepared C under the condition of maintaining vacuum S2 CO 3 solution, the reaction proceeds according to formula (2) (where M is Cs, x=2.5).

[0...

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Abstract

The invention provides a composite solid acid catalyst which comprises the following components: 50-80 wt% of porous inorganic carrier, 15-48 wt% of heteropoly acid salt loaded on the porous inorganic carrier and 2-6 wt% of inorganic acid. The invention also provides a preparation method of the composite solid acid catalyst. The acid site type of the composite solid acid catalyst provided by the invention is Bronsted acid. The acid site density is not less than 1.4 mol H<+> / g, and the acid strength is distributed uniformly. The catalyst provided by the invention is a composite solid acid catalyst with excellent performance.

Description

technical field [0001] The invention relates to a composite solid acid catalyst and a preparation method thereof, in particular to a composite solid acid catalyst containing an inorganic acid and a heteropoly acid salt and a preparation method thereof. Background technique [0002] In the field of petrochemical catalysis, most hydrocarbon conversion reactions, such as cracking, alkylation, reforming, superposition, isomerization, etherification, disproportionation, etc., use acidic catalytic materials as catalysts (Hou Xianglin. "China Oil Refining Technology ", Sinopec Press, 1991). Therefore, acidic catalytic materials play a very important role in the field of petrochemical catalysis. It is an important task for researchers to research and develop acidic catalytic materials with higher performance. [0003] The acidic properties of acidic catalytic materials mainly include acid center density, acid strength, acid center type ( acid or Lewis acid), their influence on c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/188B01J27/19B01J27/12C10G50/00
Inventor 何奕工满征慕旭宏
Owner CHINA PETROLEUM & CHEM CORP
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