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Catalyst for heavy oil catalytic cracking and preparation method thereof

A catalytic cracking and catalyst technology, which is applied in catalytic cracking, cracking, petroleum industry, etc., can solve the problems of low utilization rate of rare earths, and achieve the effects of simple and easy preparation process, reduced sulfur content, and good hydrothermal stability

Active Publication Date: 2012-03-21
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0023] In the preparation of the above improved REY molecular sieve, conventional rare earth liquid phase ion exchange is used, and the utilization rate of rare earth is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0033] According to catalyst provided by the present invention, described REY molecular sieve preparation method comprises the following steps:

[0034] (1) Contact NaY molecular sieve with a silicon-aluminum ratio ≥ 4.5 with an aqueous solution containing rare earth ions or with an aqueous solution containing rare earth ions and an aqueous solution containing aluminum ions, wherein, in terms of rare earth oxides, the ratio of rare earth ions to molecular sieve solids is preferred 0.12-0.30, more preferably 0.13-0.20, based on alumina, the ratio of aluminum ions to molecular sieve solids is 0-0.1, preferably 0-0.05, the liquid-solid ratio is 4-20, preferably 8-15, and the reaction temperature is 60- 95°C, preferably 70-80°C, the reaction time is 10-120min, the ratio is a weight ratio, adding an alkaline aqueous solution to the reaction slurry, filtering and washing to obtain a filter cake product;

[0035] (2) performing hydrothermal treatment on the filter cake product obtain...

Embodiment 1

[0057] This example illustrates the catalyst provided by the invention and its preparation method.

[0058] (1) Get 1500 grams of NaY molecular sieves (dry basis weight, produced by Qilu Catalyst Factory, the same below), after beating with 12 liters of deionized water, add a concentration of 231g / l (based on RE 2 o 3 meter) mixed RECl 3 Solution (Qilu Catalyst Factory provides, wherein La 2 o 3 52.5% by weight, CeO 2 Accounting for 46.5% by weight, Pr 2 o 5 0.6% by weight, Nd 2 o 3 Accounting for 0.4% by weight, the same below) 1059 ml, exchanged at 80 ° C for 0.5 hours, then added 150 grams of ammonium bicarbonate (chemically pure, produced by Tianjin Nankai Chemical Factory, the same below), stirred at 80 ° C for 0.5 hours, filtered and rinsed , and then roast the filter cake at 650° C. in a 100% water vapor atmosphere for 2 hours to obtain a molecular sieve dry powder. Take 1500 grams of this molecular sieve dry powder (dry basis weight), beat with 12 liters of de...

Embodiment 2

[0062] This example illustrates the catalyst provided by the invention and its preparation method.

[0063] (1) The preparation method of molecular sieve V-1 is the same as that in Example 1.

[0064] (2) Mix 1150 grams of pseudo-boehmite (produced by Shandong Aluminum Factory, alumina content 60%), 6000 grams of deionized water and 83 grams of hydrochloric acid (concentration 36%, produced by Beijing Chemical Plant, analytically pure) under stirring (the weight ratio of acid to alumina is 0.12), aging at 80°C for 1 hour, adding 154 grams of ZnO, 158 grams of TiO 2 (ZnO and TiO 2 Both are produced by Beijing Shuanghuan Reagent Factory, analytically pure), to obtain modified hydrated alumina A-2 containing zinc and titanium and having a pseudo-boehmite structure.

[0065] (3) Molecular sieve V-1 obtained in (1), DASY0.0 ultrastable molecular sieve, modified alumina hydrate A-2 obtained in (2), aluminum sol, kaolin according to the ratio of 20:17:27:11:25 The weight ratio is ...

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Abstract

The invention provides a heavy oil catalytic cracking catalyst and a method for preparing the same. The catalyst comprises an REY molecular sieve with effective quantity and a substrate. The invention is characterized in that the method for preparing the REY molecular sieve comprises: after a NaY molecular sieve is contacted with an aqueous solution containing rare-earth ions, or is contacted with the aqueous solution containing rare-earth ions and a solution containing aluminum ions or colloid, the solution is contacted with an additional precipitator so that part of rare earth is precipitated on the molecular sieve; the solution is subjected to hydrothermal treatment and is finally contacted with an aqueous ammonium salt solution; the substrate contains hydrated alumina modified by transition metal oxide; and the catalyst is prepared by the pulping, spraying and drying of the REY molecular sieve and the substrate. The catalyst is used for cracking the heavy oil, has strong capacity for cracking the heavy oil, high gasoline yield, low sulphur content in the gasoline and strong capacity for resisting vanadium pollution.

Description

technical field [0001] The invention relates to a hydrocarbon oil catalytic cracking catalyst and a preparation method thereof. Background technique [0002] In recent years, due to environmental protection considerations, the requirements for fuel oil have been increasing worldwide. Taking China as an example, GB 17930-2006 implemented on December 6, 2006 stipulates that the sulfur content of motor gasoline (II) is not more than 500ppm (mass fraction), the olefin content is not more than 35v%, and the sulfur content of motor gasoline (III) The sulfur content is not greater than 150ppm (mass fraction), and the olefin content is not greater than 30v%. More than 75% of the blending group and olefins in my country's finished gasoline come from catalytic cracking units, and Chinese refineries are processing more and more Middle Eastern crude oil with high sulfur content. Therefore, reducing the sulfur content and olefin content in FCC gasoline is beneficial to production cleanl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/05
Inventor 邓景辉朱玉霞于善青罗一斌许明德唐立文田辉平李明罡张久顺
Owner CHINA PETROLEUM & CHEM CORP
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