Preparation method of size-controllable spherical SDB hydrophobic carrier and Pt/SDB hydrophobic catalyst

A catalyst and hydrophobic technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, organic compound/hydride/coordination complex catalyst, etc., can solve the problems of high catalyst bed resistance and liquid flooding, and achieve Effects of improving utilization efficiency, increasing polymerization reaction temperature, and increasing yield

Active Publication Date: 2021-06-25
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a kind of size-controllable spherical SDB hydrophobic carrier and the preparation of Pt / SDB hydrophobic catalyst in order to overcome the excessive resistance of the catalyst bed layer in the actual industrialization process of the current small-size hydrophobic catalyst and the phenomenon of liquid flooding method

Method used

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  • Preparation method of size-controllable spherical SDB hydrophobic carrier and Pt/SDB hydrophobic catalyst
  • Preparation method of size-controllable spherical SDB hydrophobic carrier and Pt/SDB hydrophobic catalyst
  • Preparation method of size-controllable spherical SDB hydrophobic carrier and Pt/SDB hydrophobic catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Add 400mL of distilled water and 1.6g of surfactant into a 500mL beaker, stir, and ultrasonically prepare a uniform water phase with low surface tension, pour it into a prepared reaction vessel, heat to 25°C, and set aside; 1.8g of benzene Add ethylene, 2.7g divinylbenzene, 1.6g toluene, 2.4g n-heptane, 0.3g benzoyl peroxide and 6g density regulator into a 50mL beaker, stir until the density regulator and benzoyl peroxide are completely dissolved into a homogeneously mixed organic phase. Use a pipette gun to draw a quantitative amount of uniformly mixed organic phase and add it dropwise to the reaction container containing the water phase. First, shake at 25°C for 10 minutes for pre-polymerization, then stop the shaking, so that the droplets can coalesce and form large-sized spherical shapes. Suspend liquid droplets. After the pre-reaction is completed, the temperature of the water bath is raised to 80 ° C, and the suspension polymerization is carried out for 4 hours. T...

Embodiment 2

[0034] Add 400mL distilled water and 1.6g surfactant into a 500mL beaker, stir, and ultrasonically prepare a uniform low surface tension water phase, pour it into a prepared reaction vessel, heat to 35°C, and set aside; 1.8g benzene Add ethylene, 1.8g divinylbenzene, 1.6g toluene, 2.3g n-heptane, 0.25g benzoyl peroxide and 6.1g density regulator into a 50mL beaker, stir until the density regulator and benzoyl peroxide are completely Dissolve into a homogeneously mixed organic phase. Use a pipette to draw a quantitative amount of the uniformly mixed organic phase and add it dropwise to the reaction container containing the water phase. Shake at 35°C for 15 minutes for pre-polymerization, and then stop the shaking to allow the droplets to coalesce and form large-sized spherical shapes. After the pre-reaction is completed, the temperature of the water bath is raised to 75°C, and the suspension polymerization is carried out for 4.5 hours. The crude product of the SDB carrier is wa...

Embodiment 3

[0036] Add 400mL of distilled water and 1.6g of surfactant into a 500mL beaker, stir, and ultrasonically prepare a uniform low surface tension water phase, pour it into a prepared reaction vessel, heat to 40°C, and set aside; 1.8g of benzene Add ethylene, 1.8g divinylbenzene, 1.6g toluene, 2.3g n-heptane, 0.25g benzoyl peroxide and 6.1g density regulator into a 50mL beaker, stir until the density regulator and benzoyl peroxide are completely Dissolve into a homogeneously mixed organic phase. Use a pipette to draw a quantitative amount of the uniformly mixed organic phase and drop it into the reaction vessel containing the water phase. Shake at 40°C for 10 minutes for pre-polymerization, then stop the shaking to allow the droplets to coalesce and form a large-sized spherical suspension Droplets, after the pre-reaction is completed, the temperature of the water bath is raised to 75°C, and the suspension polymerization is carried out for 4.5 hours. The crude product of the SDB ca...

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Abstract

The invention provides a preparation method of a size-controllable spherical SDB hydrophobic carrier and Pt / SDB hydrophobic catalyst. The preparation method comprises the following steps: mixing a styrene and divinyl benzene polymerized monomer in a determined ratio, a polymerization initiator benzoyl peroxide, a mixed pore-foaming agent of toluene and n-heptane in a determined ratio and a density regulator to obtain an organic phase; and performing low-temperature prepolymerization on the mixed organic phase in a low-surface-tension aqueous solution to generate liquid drop coalescence, heating to initiate polymerization reaction to obtain a spherical SDB hydrophobic carrier crude product, performing acetone extraction, performing physical etching of mechanical grinding and chemical etching of oxidizing acid oxidation to realize surface roughening, and performing water washing and drying to obtain the spherical SDB hydrophobic carrier. The density of the polymer liquid beads formed by the organic phase is approximately the same as the density of the water phase with low surface tension, so that the polymer liquid beads can perfectly suspend in the water phase to form a nearly spherical polymer precursor, and the SDB hydrophobic carrier with uniform surface and regular shape is prepared.

Description

technical field [0001] The invention relates to a method for preparing a hydrophobic carrier and a hydrophobic catalyst, in particular to a method for preparing a size-controllable spherical SDB hydrophobic carrier and a Pt / SDB hydrophobic catalyst, and belongs to the field of catalyst preparation. Background technique [0002] With the rapid development of the nuclear industry and the establishment of various types of nuclear reactors and nuclear chemical fuel reprocessing reactions, a large amount of tritium-containing water will be produced every year. Tritium removal, separation and extraction technologies are important in ensuring national energy supply and safeguarding national security. has important strategic significance. The use of hydrophobic catalysts to catalyze hydrogen isotope exchange to realize the enrichment and separation of tritium has become a research hotspot, and the key technology lies in the preparation of hydrophobic catalysts. The hydrophobic cata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J35/08B01J35/10B01J37/00B01J37/02B01J37/08B01J37/18C08F212/36C08F212/08C08J7/14C08L25/06C08L25/02
CPCB01J31/28B01J35/08B01J35/1038B01J35/1061B01J35/1023B01J35/0013B01J35/006B01J37/0036B01J37/0201B01J37/08B01J37/18C08F212/36C08F212/08C08J7/14C08J2325/06C08J2325/02
Inventor 董国君黄云
Owner HARBIN ENG UNIV
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