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Heavy-oil cracking catalyst and preparation and application method thereof

A heavy oil cracking and catalyst technology, applied in chemical instruments and methods, physical/chemical process catalysts, molecular sieve catalysts, etc. The effect of strong resistance to heavy metals, high total yield, and strong calcium pollution

Active Publication Date: 2012-08-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a kind of anti-heavy metal performance with excellent heavy metal performance and capable of Improve the catalyst of the productive rate of liquefied gas, gasoline and diesel oil; Another technical problem to be solved by the present invention is to provide the preparation and application method of said heavy oil cracking catalyst

Method used

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  • Heavy-oil cracking catalyst and preparation and application method thereof
  • Heavy-oil cracking catalyst and preparation and application method thereof
  • Heavy-oil cracking catalyst and preparation and application method thereof

Examples

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preparation example Construction

[0026] The invention provides a kind of preparation method of catalyst, this method comprises:

[0027] Mix and beat retort earth, the first heat-resistant inorganic oxide and / or its precursor, additives and water, raise the temperature to 60°C to 80°C, and stir at 60°C to 80°C for 30 to 120 minutes to obtain The first slurry, the amount of the retort earth, the first heat-resistant inorganic oxide and / or its precursor, additives and water is such that the solid content of the obtained first slurry is 10 to 60% by weight, and the rector earth , the first heat-resistant inorganic oxide and / or its precursor and the amount of auxiliary agent make retort earth: heat-resistant inorganic oxide: the weight ratio of auxiliary agent in terms of elements is 45~94.9:5~50:0.1~20 , the auxiliary agent is one or a mixture of two compounds of Mn, P and Ce;

[0028] Mix the first slurry with modified ultra-stable Y-type zeolite to make a second slurry, or dry the first slurry, and mix the drie...

Embodiment 1

[0044] At room temperature, take 1000 grams (dry basis) of ultra-stable Y-type zeolite DASY, add it to 10 liters of mixed acid aqueous solution with a concentration of 0.2N oxalic acid and a concentration of 0.1N hydrochloric acid, stir to make it evenly mixed, and put it into a closed pressure reactor In, filled with N 2 , keep the pressure of the system at 0.12MPa (gauge pressure), raise the temperature to 100°C at a rate of 10°C / min, keep at this temperature and pressure for 1 hour, filter, wash, and dry at 120°C for 5 hours to obtain the modification The ultra-stable Y-type zeolite sample is denoted as SZ1. Table 1 shows the composition of SZ1, unit cell constant, relative crystallinity, structure collapse temperature, specific surface area and larger pore size (pore size is 80~ ) of secondary pores accounted for the total secondary pores (20~ ) percentage.

Embodiment 2

[0046] At room temperature, take 2000 grams (dry basis) of ultra-stable Y-type zeolite DASY, add it to 20 liters of mixed acid aqueous solution with a concentration of acetic acid of 0.1N and a concentration of hydrochloric acid of 0.15N, stir to make it evenly mixed, and put it into a closed pressure reactor , filled with N 2 , control the pressure of the reactor to 0.3MPa (gauge pressure), raise the temperature to 115°C at a heating rate of 10°C / min, and keep it at this temperature and pressure for 30 minutes, then filter, wash, and dry the filter cake at 120°C for 5 hours , to obtain the modified ultrastable Y-type zeolite sample, denoted as SZ2, table 1 has provided the composition of SZ2, unit cell constant, relative crystallinity, structure collapse temperature, specific surface area and larger pore diameter (pore diameter is 80~ The secondary pores accounted for the total secondary pores (20~ ) percentage.

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Abstract

The invention relates to a heavy-oil cracking catalyst and a preparation and application method thereof. The catalyst contains modified ultrastable Y-type zeolite and a composition, wherein the composition contains 45-94.9 percent of rectorite and 5-50 percent of first heatproof inorganic oxides by weight percent and 0.1-20 percent of assistant selected from compounds of Mn, P and Ce by element weight percent; and the ratio of silicate to aluminum of modified ultrastable Y-type zeolite is 6-15, the lattice constant is 2.440-2.458nm, and secondary holes with aperture of 80-100 account for 30-60 percent of the total secondary holes. The preparation method of the catalyst comprises that the composition is prepared, the composition and the modified ultrastable Y-type zeolite are mixed and are crushed into slurry, and the slurry is spayed and dried. The anti-metallic contamination capacity of the catalyst is high, the coke selectivity is good, the catalyst can be used for heavy-oil catalytic cracking, the heavy-oil conversion rate is high, the gasoline yield is high and the total yield of liquefied gas, gasoline and diesel is high.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst. Background technique [0002] The increase in the weight of raw oil and the refinery's pursuit of economic benefits require the improvement of the cracking catalyst's ability to crack heavy oil and the ability to resist heavy metal pollution. The pore diameter of the Y-type zeolite used in the cracking catalyst is 0.74nm. The small and medium molecular hydrocarbons in the raw oil can enter the inner pores of the zeolite to undergo cracking reactions, while the large molecular hydrocarbons are difficult to enter the inner pores of the zeolite, so its heavy oil cracking ability is poor. Coke selection Sex is poor. In order to improve the heavy oil cracking ability of the catalyst, the matrix of the cracking catalyst usually has large pores and a certain acidity that heavy oil macromolecules can enter. Molecules then enter the more acidic zeolite pores and further crack into smaller molecules. [...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/16C10G11/05
Inventor 周灵萍张蔚琳许明德李峥田辉平朱玉霞严加松于善青
Owner CHINA PETROLEUM & CHEM CORP
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