Molecular screen microspherical catalyst

A molecular sieve and catalyst technology, applied in the field of molecular sieve microsphere catalyst, can solve the problem that the catalyst has good mechanical strength and cannot have two indicators at the same time, and achieves the effects of good reaction activity, reduction of dosage, and improvement of pore distribution structure.

Active Publication Date: 2005-12-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to overcome the problems in the prior art that the high molecular sieve content in the catalyst and the mechanical strength of the catalyst cannot be met at the same time, and provide a new molecular sieve microsphere catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] With 68 grams of kaolin (15% by burning), add 125 grams of water and soak for 10 minutes, then beat with high shear for 10 minutes, add 300 grams of aluminum sol (20.6% (weight) of aluminum oxide content) and stir for 5 minutes, then add 26 20 grams of water glass of % silicon oxide, and add 20% (weight) nitric acid to adjust the pH value to be about 3.5, finally add 125 gram HZSM-5 molecular sieve beatings for 15 minutes, obtain the slurry of 40% (weight) solid content. The slurry was spray-dried to form, the inlet air temperature was 600° C., and the outlet was 350° C. to obtain a microsphere catalyst with an average particle size of 60 microns and a molecular sieve content of 50% by weight. The measured catalyst heap ratio is 0.83 g / ml, and the wear index is 1.5% in hours -1 .

Embodiment 2

[0035] Same preparation process condition as embodiment 1, change the consumption of molecular sieve, water glass and aluminum sol, kaolin is balancing agent, makes catalyst (when water glass consumption is high, exchange three times with 10% weight ammonium nitrate solution and dry, roast ).

[0036] And put 30 grams of catalyst into the fluidized bed reactor, control the reaction temperature at 450~650°C, 550, space velocity WHSV1~15 hours -1 , 5, water / oil molar ratio 0.5 ~ 3, 1, under the condition of pressure 0 ~ 1.5 atmospheric pressure (gauge pressure), it is used in the test of raffinate mixed C4 catalytic cracking to produce propylene and ethylene, and evaluates the reaction performance of the catalyst.

[0037] Example

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PUM

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Abstract

The invention relates to a molecular sieve micro-balloon catalyst which mainly resolves the problem that the two indexes of macro-mole sieve capacity and good mechanic strength of catalyst can't exist at the same time. It adopts molecular sieve and adds alumina, silicon oxide and clay so that the packing density of catalyst is at 0.6-0.9 gram / milliliter which can be used in industry preparation of fixed bed, fluid bed or moved bend molecular sieve.

Description

technical field [0001] The invention relates to a molecular sieve microsphere catalyst, in particular to a high-content molecular sieve microsphere catalyst suitable for fluidized bed operation. Background technique [0002] Molecular sieve catalysts have been successfully used in various chemical reaction processes due to their excellent catalytic performance. At the same time, due to the strong acidity of molecular sieves, when catalyzing various organic substances to react, they are particularly prone to coking and carbon formation, which makes the catalyst deactivated quickly. In order to make the reaction go smoothly, the catalyst must be continuously burned and regenerated. To this end, various types of reaction-regeneration process systems and corresponding catalyst types have been developed, such as moving bed, fluidized bed, riser and other reactors. The catalysts are microspheres and require good wear resistance and fluidization perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/04
Inventor 金文清滕加伟李斌杨为民
Owner CHINA PETROLEUM & CHEM CORP
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