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Hydrocarbon cracking catalyst containing phosphorus and its prepn

A cracking catalyst and catalyst technology, applied in cracking, catalytic cracking, petroleum industry, etc., can solve the problems of less reduction in chlorine content, reduction in catalyst wear rate, complicated preparation methods, etc., to achieve gas and coke production rate reduction, diesel production The effect of increased rate and improved product selectivity

Inactive Publication Date: 2003-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Report in CN86104860A, add phosphoric acid solution in the pseudo-boehmite of aging, then mix with zeolite and clay, spray dry, roast, the catalyst wear rate that obtains declines to some extent
However, there are also many shortcomings in using this phosphorus-containing aluminum sol as a binder.
One is that the preparation process of this binder requires steps such as high-temperature depolymerization and concentration, and the preparation method is relatively complicated; the other is that in order to ensure the stability and fluidity of the phosphorus-containing aluminum sol, the phosphorus content in the sol is limited. The P / Al (weight) ratio is lower than 0.25; the third is that compared with the aluminum sol, the chlorine content of this phosphorus-containing aluminum sol is reduced very little, and mainly relies on the use of chlorine-containing aluminum with a high Al / Cl (weight) ratio. Sol raw materials to improve its Al / Cl (weight) ratio, which is difficult to achieve industrially
As far as the inventors know, there is no report on the preparation of hydrocarbon cracking catalysts by using chlorine-free phosphorus-containing aluminum sol binders

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0031] The preparation method of the phosphorus-containing hydrocarbon cracking catalyst provided by the present invention includes:

[0032] Beat the clay with water and mix uniformly; if necessary, optionally add the required proportion of carrier alumina or aluminum hydroxide and hydrochloric acid, continue to beating and mix uniformly, and then heat the slurry to 55-65°C and aging for 0.5-1.5 hours to make the slurry The pH value is higher than 2.8; the amount of hydrochloric acid is HCl / Al 2 O 3 Weight ratio = 0.02 ~ 0.25; the amount of water used is such that the solid content of the obtained slurry = 10 ~ 50% by weight;

[0033] Add a mixed sol of aluminum chloride sol and aluminum phosphate sol to the obtained slurry, or add aluminum chloride sol and aluminum phosphate sol respectively, and add molecular sieve slurry, then beat and mix uniformly to make a solid content of 20-50 % By weight of the catalyst slurry; the proportion of each component in the catalyst slurry is b...

Embodiment 1

[0062] This example illustrates the preparation of a phosphorus-containing aluminum sol and mixed binder used in the catalyst of the present invention.

[0063] 5.8 kg of pseudo-boehmite (containing Al 2 O 3 1.8 kg) and 4.0 kg of deionized water for 30 minutes, add 9.6 kg of concentrated phosphoric acid to the slurry with stirring, increase the temperature to 70°C, and react at this temperature for 45 minutes to obtain a colorless and transparent phosphorous aluminum sol. Its pH is 1.7. After analysis, the phosphorus-containing aluminum sol contained P 14.7% by weight, Al 4.7% by weight, and P / Al (weight)=3.1.

[0064] Preparation of the mixed binder: the above-prepared phosphor-aluminum glue and aluminum sol are mixed uniformly in different proportions to obtain mixed binders with different P / Al ratios and Al / Cl ratios.

Embodiment 2

[0066] This example illustrates the preparation of a phosphorus-containing aluminum sol and mixed binder used in the catalyst of the present invention.

[0067] 2.13 kg of SB powder (including Al 2 O 3 1.6 kg) and 7.6 kg of de-cationized water were beaten for 30 minutes, 6.0 kg of concentrated phosphoric acid was added to the slurry with stirring, the temperature was raised to 80°C, and then reacted at this temperature for 45 minutes to obtain a colorless and transparent phosphorous aluminum sol. Its pH is 1.9. After analysis, the phosphorus-containing aluminum sol contained P 10.5% by weight, Al 5.0% by weight, and P / Al (weight)=2.1.

[0068] Preparation of the mixed binder: the above-prepared phosphor-aluminum glue and aluminum sol are mixed uniformly in different proportions to obtain mixed binders with different P / Al ratios and Al / Cl ratios.

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PUM

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Abstract

The hydrocarbon cracking catalyst contains molecular sieve, binder and clay and its features are the mixed sol of chlorine-containing aluminum sol and phosphorus-containing aluminium sol used as binder. The binder raises the antiwear strength of the catalyst, and decreases the chlorine content in the spray drying slurry and the catalyst. The hydrocarbon cracking catalyst results in lower gas and coke yield and higher diesel oil yield and diesel oil / gasoline ratio.

Description

Technical field [0001] The invention relates to a petroleum hydrocarbon cracking catalyst and a preparation method thereof, in particular to a molecular sieve-containing hydrocarbon cracking catalyst using aluminum sol and phosphorus-containing aluminum sol mixed sol as a binder and a preparation method thereof. Background technique [0002] Phosphorus-containing hydrocarbon cracking catalysts mainly have the following three types: one type is the molecular sieve component of the catalyst is a phosphorus-containing zeolite molecular sieve, as described in USP5,312,792, USP5,472,594, EP667185, etc.; the other type is the catalyst containing aluminum phosphate Or alumina-aluminum phosphate as a part of the matrix or matrix. This type of catalyst matrix has good thermal stability, good activity and selectivity, and is suitable for heavy oil cracking, such as USP 4,158,621, USP 4,179,358, USP 4,210,560, USP 4,222,896, EP488427, EP4962267, etc.; the other is to treat molecular sieve, ...

Claims

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Application Information

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IPC IPC(8): C10G11/02
Inventor 蒋文斌郑曼英陈蓓艳达志坚桂跃强黄轶唐立文杨青
Owner CHINA PETROLEUM & CHEM CORP
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