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Preparation method for catalytic cracking catalyst for cracking coker gas oil and increasing production of diesel

A technology of coking wax oil and catalytic cracking, which is applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve problems such as unconsidered effects, improve activity stability, reduce pore plugging, and inhibit coke condensation The effect of the reaction

Active Publication Date: 2019-02-05
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the large molecular size of the basic compound, when the catalyst prepared by the above-mentioned patent method reacts with the basic nitrogen compound, it will inevitably prevent other hydrocarbon molecules from contacting the acidic center of the catalyst, and the above-mentioned patent does not consider the aromatic hydrocarbons and non-alkali in coking wax oil. Effect of Nitrogen Compounds on Catalytic Cracking

Method used

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  • Preparation method for catalytic cracking catalyst for cracking coker gas oil and increasing production of diesel

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Preparation of Y-type molecular sieve modified by rare earth, phosphorus and magnesium:

[0039] Take 1000 grams of NaY molecular sieves (dry basis), beat with 10 kilograms of deionized water, add 300 grams of ammonium sulfate, adjust the pH value to 3.5, exchange at 90 ° C for 1 hour, filter and wash with water, and then mix the filter cake with 100 grams of chlorine Lanthanum chloride (calculated as rare earth oxide) was mixed, and roasted at 650°C and 30% steam for 2 hours to obtain a rare earth modified molecular sieve; the roasted sample obtained above was beaten with 5 kg of deionized water, and 50 grams of hydrogen phosphate was added Diammonium (in terms of phosphorus), adjusting the pH value to 4.0, exchanged at 80°C for 1 hour, filtered and washed, and then the filter cake was roasted at 600°C for 1 hour to obtain a phosphorus rare earth modified molecular sieve; the above phosphorus rare earth modified molecular sieve was mixed with Mix and beat 8 kg of deion...

Embodiment 2

[0046] Preparation of Y-type molecular sieve modified by rare earth, phosphorus and magnesium:

[0047] Take 1000 grams of NaY molecular sieves (dry basis), beat with 50 kilograms of deionized water, add 150 grams of ammonium chloride, adjust the pH value to 2.1, exchange for 4 hours at 45 ° C, filter and wash with water, then filter cake with 100 grams of Lanthanum nitrate and 200 grams of cerium nitrate (calculated as rare earth oxide) were mixed, and roasted at 400 ° C for 3 hours to obtain a rare earth modified molecular sieve; the roasted sample obtained above was beaten with 50 kg of deionized water, and 100 grams of ammonium phosphate was added (in terms of phosphorus), adjust the pH value to 2.0, exchange at 130°C for 0.5 hours, filter and wash with water, and then roast the filter cake at 600°C and 100% steam for 0.5 hour to obtain phosphorus rare earth modified molecular sieves; The modified molecular sieve was mixed with 50 kg of deionized water and 50 g of magnesiu...

Embodiment 3

[0054] Preparation of Y-type molecular sieve modified by rare earth, phosphorus and magnesium:

[0055] Take 1000 grams of NaY molecular sieve (dry basis), beat with 1 kilogram of deionized water, add 1000 grams of ammonium carbonate, adjust the pH value to 5.8, exchange at 130 ° C for 0.5 hours, filter and wash with water, and then filter the cake with 10 grams of nitric acid Cerium (in terms of rare earth oxides) was mixed, and roasted for 1 hour at 700°C and 50% steam to obtain a rare earth modified molecular sieve; the roasted sample obtained above was beaten with 2 kg of deionized water, and 10 grams of phosphoric acid (with Phosphorus meter), adjusting the pH value to 5.9, exchanged at 40°C for 3 hours, filtered and washed with water, and then the filter cake was roasted at 300°C and 50% steam for 3 hours to obtain a phosphorus rare earth modified molecular sieve; the above phosphorus rare earth modified molecular sieve Mix and beat with 2 kg of deionized water and 2 g o...

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Abstract

The invention provides a preparation method for a catalytic cracking catalyst for cracking coker gas oil and increasing production of diesel. The preparation method comprises the following steps thata rare earth, phosphorus and magnesium modified Y-type molecular sieve is prepared, specifically, a NaY molecular sieve is subjected to ammonium salt and rare earth salt exchange and then is sequentially modified by phosphorus and magnesium, wherein the step is characterized in that phosphorus modification is carried out before magnesium modification; (2) the catalyst is formed, specifically, water, the molecular sieve, clay, pseudo-boehmite and a binder are mixed, pulped, spray-dried and roasted; and (3) modification is carried out, specifically, the water, magnesium salt and catalyst particles are uniformly mixed, the pH value is adjusted, and filtering and drying are carried out. The catalyst shows good heavy oil conversion capability and diesel selectivity in the process of cracking the coker gas oil.

Description

technical field [0001] The invention relates to a method for preparing a catalytic cracking catalyst, in particular to a method for preparing a catalyst for cracking coking wax oil and producing diesel oil. Background technique [0002] Delayed coking is currently an important residue upgrading process. With crude oil quality deteriorating and prices depressed, delayed coking has become more popular in current refining schemes due to the flexibility in processing feedstock. Delayed coking processing capacity has increased dramatically in China, reaching 110 million tons in 2010. Coker gas oil (CGO) is the main product of the delayed coking process, accounting for 20-30% by weight of the coking product, and the utilization rate of coker gas oil directly affects the economic benefit of the refinery. [0003] In foreign countries, coker wax oil is used as raw material for catalytic cracking after hydrotreating. For example, in the United States, more than 50% of FCC feedstoc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08C10G11/05
CPCC10G11/05B01J29/088C10G2400/04
Inventor 张海涛潘志爽袁程远谭争国高雄厚张忠东李雪礼段宏昌黄校亮孙雪芹郑云锋孙书红张向阳
Owner PETROCHINA CO LTD
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