Catalytic cracking catalyst for cracking coker gas oil and increasing production of liquefied gas and preparation method thereof

A technology for coking wax oil and catalytic cracking, which is used in catalyst activation/preparation, catalytic cracking, physical/chemical process catalysts, etc., can solve problems such as unconsidered effects, and achieve increased smoothness, improved utilization, and reduced coke plugging. effect of phenomenon

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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  • Catalytic cracking catalyst for cracking coker gas oil and increasing production of liquefied gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of Y-type molecular sieve modified by rare earth, phosphorus and magnesium:

[0040] Take 1000 grams of NaY molecular sieve (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, exchanging at 80°C for 1 hour, filtering and washing with water, then roasting the filter cake at 600°C for 1 hour to obtain a phosphorus rare earth modified molecular sieve; combine the above phosphorus rare earth modified molecular sieve with Mix and beat 8 kg of d...

Embodiment 2

[0047] Preparation of Y-type molecular sieve modified by rare earth, phosphorus and magnesium:

[0048] 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

[0055] Preparation of Y-type molecular sieve modified by rare earth, phosphorus and magnesium:

[0056] 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 catalytic cracking catalyst for cracking coker gas oil and increasing production of liquefied gas and a preparation method thereof. The catalyst is prepared from 10-50 wt% a Ymolecular sieve, 2-50 wt% of an MFI structure molecular sieve, 15-60 wt% of clay, 8-30 wt% of pseudo-boehmite and 3-20 wt% of a binder. The preparation method comprises the following steps that (1) arare 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 Y type molecular sieve, the MFI structure molecular sieve, the clay, the pseudo-boehmite and the binder are mixed and are subjected to spray drying; and (3) the catalyst is modified, specifically, catalyst solid particles are roasted by water vapor, the pH value is adjusted by using an acidic substance, and then filtering and drying are carried out. The catalyst has the characteristics of being high in coker gas oil cracking capacity and high in liquefied gas yield.

Description

technical field [0001] The invention relates to a catalyst for catalytic cracking and a preparation method thereof, in particular to a catalyst for cracking coking wax oil to produce more liquefied gas and a preparation method thereof. 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, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G11/05
CPCB01J29/088B01J29/40B01J29/80B01J37/06B01J37/10B01J37/30B01J2229/18B01J2229/37C10G11/05
Inventor 潘志爽谭争国袁程远张海涛高雄厚张忠东李雪礼段宏昌黄校亮侯凯军郑云锋孙书红崔文广
Owner PETROCHINA CO LTD
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