Preparation method of hydrocracking catalyst, hydrocracking catalyst and application

A hydrocracking and catalyst technology, applied in the direction of physical/chemical process catalysts, catalyst carriers, molecular sieve catalysts, etc., can solve the problems of low yield of cracked light oil, short catalyst life, poor catalyst activity, etc., to avoid the skeleton structure The effect of destruction, uniform distribution and smooth channels

Active Publication Date: 2022-05-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst prepared by this method has poor activity, more coking in the reaction, shorter catalyst life, and low yield of cracked light oil, and the conversion rate of coal tar pitch needs to be further improved

Method used

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  • Preparation method of hydrocracking catalyst, hydrocracking catalyst and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] (i) Preparation of Beta / Al-SBA-15 composite molecular sieve

[0082] (1) Preparation of amorphous silica-alumina dry rubber powder A1 and slurry: sodium aluminate solution concentration 15gAl 2 o 3 / L, the concentration of sodium silicate solution is 82SiO 2 / L, take 0.85L sodium aluminate solution and put it into a gel-forming tank, then add 0.30L sodium silicate solution, control the reaction temperature at 20°C, and feed CO with a concentration of 35v%. 2 gas, CO 2 When the gas accounts for 65% of the total intake, add 0.30L sodium silicate solution while ventilating, control the pH value of the gel to be 9.5, then ventilate and stabilize for 20 minutes, filter the slurry and wash it with 65°C deionized water until neutral. The filter cake was beaten with water at a solid-to-liquid volume ratio of 10:1, cracked at 130°C under 3.5MPa steam pressure for 3 hours, dried at 120°C for 6 hours, crushed and sieved to obtain the amorphous silica-alumina product A1. The pr...

Embodiment 2

[0093] (i) Preparation of Beta / Al-SBA-15 composite molecular sieve

[0094] (1) Preparation of amorphous silica-alumina dry rubber powder A2 and slurry: concentration of sodium aluminate solution 35gAl 2 o 3 / L, the concentration of sodium silicate solution is 125gSiO 2 / L, take 0.85L sodium aluminate solution and put it into the gel-forming tank, then add 0.2L sodium silicate solution, control the reaction temperature at 22°C, and feed CO with a concentration of 48v%. 2 gas, CO 2 When the gas accounts for 55% of the total feed volume, add 0.25L sodium silicate solution while ventilating to control the pH value of the gel to 9.8, then ventilate and stabilize for 20 minutes, filter the slurry and wash it with 75°C deionized water until neutral. The filter cake was beaten with water at a solid-to-liquid volume ratio of 8:1, cracked at 110°C and 3.0 MPa steam pressure for 3 hours, dried at 120°C for 8 hours, crushed and sieved to obtain amorphous silicon-aluminum product A2, a...

Embodiment 3

[0105] (i) Preparation of Beta / Al-SBA-15 composite molecular sieve

[0106] (1) Preparation of amorphous silica-alumina dry rubber powder A3 and slurry: sodium aluminate solution concentration 22gAl 2 o 3 / L, sodium silicate working solution concentration 80gSiO 2 / L, take 1.08L sodium aluminate solution and place it in a gel-forming tank, then add 0.25L sodium silicate solution, control the reaction temperature at 32°C, and feed CO with a concentration of 55v%. 2 Gas, stop when the pH value reaches 9.8, then ventilate and stabilize for 20 minutes, wash until neutral, add water to the filter cake at a solid-to-liquid volume ratio of 8:1, and crack at 130°C for 2.5 hours under 3.9MPa steam pressure. After drying at 120°C for 8 hours, it was crushed and sieved to obtain the amorphous silica-alumina product A3. The properties of amorphous silica-alumina dry rubber powder A3 are shown in Table 1. The prepared amorphous silica-alumina A3 and deionized water were mixed and beate...

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Abstract

The invention discloses a preparation method of a hydrocracking catalyst, the hydrocracking catalyst and application of the hydrocracking catalyst. The preparation method of the hydrocracking catalyst comprises the following steps: (i) preparing a Beta/Al-SBA-15 composite molecular sieve; (ii) mixing, kneading and molding the Beta/Al-SBA-15 composite molecular sieve prepared in the step (i), a Y molecular sieve and aluminum oxide to obtain a carrier precursor; (iii) impregnating the carrier precursor obtained in the step (ii) with a nano silicon dioxide dispersion liquid, and then drying to obtain a hydrocracking catalyst carrier; and (iv) dipping the carrier obtained in the step (iii) in a solution containing an active metal component, and drying and roasting to obtain the hydrocracking catalyst. The hydrocracking catalyst prepared by the method is used for hydrocracking of coal tar, and the cetane number and condensation point of diesel oil can be greatly improved.

Description

technical field [0001] The invention relates to a preparation method of a hydrocracking catalyst, in particular to a preparation method of a hydrocracking catalyst suitable for converting coal tar fractions into clean gasoline and diesel oil. Background technique [0002] Coal tar is an important by-product in the process of coal pyrolysis and carbonization. It is a black or dark brown viscous liquid with pungent odor. It is a complex mixture of hydrocarbons with high aromaticity. According to the temperature of coal pyrolysis and carbonization Different from the process method, coal tar can be divided into low-temperature coal tar and high-temperature coal tar. Coal tar raw materials have the characteristics of high content of heteroatoms such as sulfur and nitrogen, high content of ash, high content of polycyclic aromatic hydrocarbons, and high content of colloids and asphaltenes. [0003] Coal tar hydrogenation is carried out under high temperature and high pressure, und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J35/10B01J32/00B01J21/08C10G47/20
CPCB01J29/80B01J21/08B01J35/1019B01J35/1038B01J35/1042B01J35/1061B01J35/0066C10G47/20B01J29/7815B01J29/0341B01J2229/186C10G2400/02C10G2400/04C10G2300/70
Inventor 于政敏唐兆吉樊宏飞刘建锟
Owner CHINA PETROLEUM & CHEM CORP
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