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Method for preparing hydrocracking catalyst

A hydrocracking and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems that are not conducive to the effective coordination of hydrogenation metals and acidic components, affect catalyst performance, and are not conducive to equal activity question

Active Publication Date: 2019-07-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The above method cannot control the distribution of hydrogenation active metals well, thereby affecting the distribution of different hydrogenation active metals, which is not conducive to the formation of effective active phases, and is not conducive to the effective coordination of hydrogenation metals and acidic components, and ultimately affects the performance of the catalyst.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Dissolve nickel chloride and ammonium metatungstate solution in deionized water respectively to prepare mixed solution A. The weight concentration of Ni in mixed solution A is 42g / L in terms of NiO, and W is expressed as WO 3 The weight concentration of meter is 30g / L. Dissolve ammonium metatungstate and aluminum chloride solution in deionized water respectively, add dilute water glass solution to prepare mixed solution B, W in mixed solution B is WO 3 The weight concentration of Al is 24g / L, Al is Al 2 o 3 The weight concentration of the meter is 28g / L, Si is SiO 2 The weight concentration of the meter is 40g / L. 500mL deionized water is added in the reaction tank, and the weight concentration is based on Al 2 o 3 The 32g / L sodium metaaluminate solution and solution A are added into the reaction tank in parallel flow, the gelling temperature is kept at 60°C, the pH value is controlled at 7.6 during the co-flow gelling reaction process, and the gelling time is contr...

Embodiment 2

[0061] According to the method of embodiment 1, press the component content ratio of catalyst B in table 1, add nickel nitrate, ammonium metatungstate, zirconium oxychloride solution in dissolving tank 1, prepare mixed solution A, add to dissolving tank 2 Add ammonium metatungstate and aluminum chloride solution to dissolve in deionized water, add water glass to prepare mixed solution B, add deionized water into the reaction tank, and make the weight concentration equal to Al 2 o 3 50g / L sodium metaaluminate solution and mixed solution A are added into the reaction tank in parallel, the gelling temperature is kept at 50°C, the pH value is controlled at 7.6 during the concurrent gelling reaction process, and the gelling time is controlled at 1.2 hours , Generate slurry I containing nickel, tungsten, aluminum, zirconium precipitate. The obtained precipitate slurry I was aged, the aging temperature was 75° C., the aging pH value was controlled at 7.0, and the aging was carried o...

Embodiment 3

[0063] According to the method of Example 1, according to the component content ratio of the catalyst C in Table 1, nickel chloride and ammonium metatungstate are added in the dissolution tank 1, the mixed solution A is prepared, and aluminum chloride is added in the dissolution tank 2 , ammonium metatungstate solution deionized water, add water glass, prepare mixed solution B, add deionized water in the reaction tank, the weight concentration is based on Al 2 o 3The sodium metaaluminate solution of 39g / L and the mixed solution A are added into the reaction tank in parallel flow, the gelling temperature is kept at 55°C, the pH value is controlled at 8.1 during the co-current gelling reaction process, and the gelling time is controlled at 0.9 hours , Generate slurry I containing nickel, tungsten, and aluminum precipitates. The obtained precipitate slurry I was aged, the aging temperature was 72° C., the aging pH value was controlled at 7.3, and the aging was performed for 0.6 ...

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Abstract

The invention discloses a method for preparing a hydrocracking catalyst. According to the catalyst, firstly, a mixed solution A containing Ni and W and a sodium metaaluminate alkaline solution are subjected to a gelatinization reaction in a parallel flow manner, obtained slurry is aged, then, a mixed solution B containing W, Si and Al components and ammonia water are added to the aged slurry in aparallel flow manner to be subjected to a gelatinization reaction, aging is performed after a suspension of a molecular sieve is added, then, drying, forming and re-drying are performed, treatment isperformed with a mixed aqueous solution of aluminum salt and organic acid, washing, drying and calcination are performed, and the hydrocracking catalyst is prepared. The hydrocracking catalyst is applied to medium oil type hydrocracking catalysts and has good activity and selectivity.

Description

technical field [0001] The invention relates to a preparation method of a hydrocracking catalyst for treating heavy hydrocarbons. Background technique [0002] Hydrocracking is carried out under relatively high pressure. Hydrocarbon molecules and hydrogen undergo cracking and hydrogenation reactions on the catalyst surface to generate lighter molecules. At the same time, hydrodesulfurization, denitrogenation and hydrogenation of unsaturated hydrocarbons also occur reaction. The cracking reaction of hydrocarbons in the hydrocracking process is carried out on the acidic center of the catalyst, following the carbon ion reaction mechanism, hydrogenation and cracking reactions are accompanied by the occurrence of hydrocarbon isomerization reactions. [0003] The hydrocracking catalyst is composed of a hydrogenation component and an acidic component. The two are added in a certain proportion as required to balance the hydrogenation and cracking performance. Its function is to ful...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/16C10G45/12
CPCB01J29/166C10G45/12C10G2300/202
Inventor 王继锋王海涛徐学军刘东香冯小萍
Owner CHINA PETROLEUM & CHEM CORP
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