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Heteropoly acid containing hydrocracking catalyst and its preparation method

A hydrocracking, heteropolyacid technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, catalyst supports, etc., can solve the negative effects of apparent reaction activity and product distribution, reaction The problem of increased diffusion resistance of substances and products, etc., achieves the effect of simple composition and definite structure.

Inactive Publication Date: 2007-03-14
XIAMEN 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 solve the problems of the existing molecular sieve-containing hydrocracking catalysts, such as the small pore size of the molecular sieve, which leads to the increase of the diffusion resistance of the reactant and the product, and the negative impact on the apparent reactivity and product distribution, etc., to provide a large Hydrocracking catalyst with high pore size and high activity and preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] 1) Pretreatment of the carrier: set the specific surface of the carrier to 380m 2 g -1 SiO 2 The particles are soaked in dilute acid solution for 4 hours, washed with distilled water until neutral, dried at 80-120°C for 5 hours, and calcined at 550°C for 4 hours. Finally sieve 40~60 mesh SiO 2 spare.

[0016] 2) Catalyst preparation: 80g of the above-mentioned carrier SiO 2 Put in 600ml concentration of 0.5mol L -1 Nickel nitrate solution, let it stand for 12h, and then dry it at 120°C for 5h. Dry the dried solid in a muffle furnace at 10°C min -1 The speed was increased to 400°C, and the temperature was kept constant for 5h. The calcined catalyst was immersed in 86g of phosphotungstic acid aqueous solution, dried at 100°C for 5h after standing for 10h, and then calcined at 430°C for 4h. The chemical composition and heteropolyacid phase of the prepared catalyst are listed in Table 1.

[0017] 3) evaluation condition: the prepared catalyst is in the CS of 5 / 95 (...

Embodiment 2

[0019] In Example 1, changing the 86g of phosphotungstic acid in the preparation step 2) to 37g of phosphotungstic acid is the cost example. The results are shown in Table 3.

Embodiment 3

[0021] In Example 1, changing the content of phosphotungstic acid in the preparation step 2) to 70g of phosphotungstic acid is the cost example. The results are shown in Table 3.

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Abstract

The invention relates to a hydrocracking catalyst which contains heteropoly acid, with large diameter and high activity. Wherein, it comprises heteropoly acid, hydrogen component and carrier; the carrier is porous thermal-resistant inorganic material; the heteropoly acid is H3PW12O40 .nH2O, H3PMo12O40 .nH2O, H4SiW12O40 .nH2O or H4SiMo12O40 ..nH2O; the hydrogen component is transition metal element; the heteropoly acid is 20-70%, the hydrogen component is 1-20% and the left is carrier. And the production comprises: selecting inorganic thermal-resistant particle carrier as catalyst carrier, preparing the metal salt water solution of hydrogen component, emerging said carrier, drying the separated solid, baking; preparing heteropoly acid water solution; drying and baking the solid.

Description

technical field [0001] The invention relates to a hydrocracking catalyst and a preparation method of long-chain alkanes. Background technique [0002] In the oil refining industry, hydrocracking is an important process for producing high-quality light oil products from heavy oil, and the core of its technology is the catalyst used. The hydrocracking catalyst is a dual-function catalyst, which has both acidic function and hydrogenation function. The acid function of the typical hydrocracking catalysts currently used is mainly provided by molecular sieves, and Mo-Ni or W-Ni is selected as the hydrogenation component. For example, US patents US5,536,687, US5,447,623 and US5,350,501; European patent EP0028938A1; Chinese patents CN1389545A and CN2393521A all relate to hydrocracking catalysts and their preparation methods. The hydrocracking catalyst containing molecular sieve has the advantages of strong acidity and large specific surface, but its disadvantage is that the small ...

Claims

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Application Information

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IPC IPC(8): B01J27/19B01J27/188B01J23/74B01J32/00C10G47/12
Inventor 方维平邱波伊晓东林凌王跃敏万惠霖
Owner XIAMEN UNIV
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