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Catalyst for preparing low-carbon olefine by catalytic cracking using fluidized-bed and preparation method and use thereof

A technology of catalytic cracking and low-carbon olefins, which is applied in the preparation of the above-mentioned catalysts, the application of the above-mentioned catalysts, and the field of catalysts for the production of low-carbon olefins by fluidized bed catalytic cracking. It can solve the problems of insufficient research work and achieve coke yield. Low temperature, good hydrothermal stability, and high olefin yield

Active Publication Date: 2009-01-07
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is no industrialization process of this process, and the corresponding research work is not systematic enough.

Method used

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  • Catalyst for preparing low-carbon olefine by catalytic cracking using fluidized-bed and preparation method and use thereof
  • Catalyst for preparing low-carbon olefine by catalytic cracking using fluidized-bed and preparation method and use thereof
  • Catalyst for preparing low-carbon olefine by catalytic cracking using fluidized-bed and preparation method and use thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0046] The preparation method of catalyst comprises the following steps:

[0047] The first step is the modification of the molecular sieve, that is, replacing the molecular sieve with a rare earth metal compound.

[0048] The second step is mixing and beating. Molecular sieve and non-stoichiometric aluminum phosphate are mixed with water for beating. When silicon-containing compounds are added, molecular sieves, non-stoichiometric aluminum phosphate and silicon-containing compounds are mixed with water to form a slurry.

[0049] In the third step, the above slurry is spray-dried to make microspheres.

[0050] In the fourth step, the microspheres prepared above are calcined at 400-600° C. for 2-10 hours to obtain the microsphere catalyst.

[0051] The catalyst of the present invention can be applied in the reaction of preparing light olefins from residual oil, animal and vegetable oil, hydrogenated tail oil or / and naphtha as raw materials. The low-carbon olefins referred to ...

Embodiment 1

[0059] According to the ratio of Al:P=1:0.3, the Al 2 o 3 and H 3 PO 4 Mixing produces non-stoichiometric aluminum phosphate. Make substrate (65wt%) with this aluminum phosphate, mix with LaZSM-5 molecular sieve (35wt%), through spray drying, roast at 400-600 ℃ to make fluidized bed microsphere catalyst (for the equilibrium catalyst mentioned later Phase distinction, the microsphere catalyst is called fresh catalyst).

[0060] The prepared microsphere catalyst was treated with water vapor at 800°C for 10 hours, or at 820°C for 4 hours to prepare an equilibrium catalyst.

[0061]The reaction results on the micro-reactor device:

[0062] Reaction condition: with N 2 As the carrier gas, the flow rate is 22.5ml / min; the catalyst loading volume is 5ml; the reaction raw material is Daqing atmospheric residual oil; the oil intake volume is 0.3g / min.

[0063] When reacting at 670°C:

[0064]

[0065] The result of the reaction in a fixed fluidized bed:

[0066] Reaction co...

Embodiment 2

[0070] According to the ratio of Al:P:Si=1:0.92:0.38, the Al 2 o 3 、H 3 PO 4 mixed with silica sol. The mixture is mixed with 35wt% LaZSM-5 molecular sieve by using 65% by weight as a matrix, and then spray-dried and calcined to make a microsphere catalyst.

[0071] The reaction result on the micro-reactor device at 670°C (other conditions are the same as Example 1):

[0072]

[0073] Reaction result on fixed fluidized bed (other conditions are the same as example 1) when 660 DEG C:

[0074]

[0075]

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Abstract

The invention discloses a catalyst used for preparing lower olefins through the catalytic cracking process of a fluidized bed, and the catalyst comprises an active component molecular sieve and a matrix, wherein, the matrix is nonstoichiometric aluminium phosphate or the nonstoichiometric aluminium phosphate doped with a silicon-containing compound; the chemical composition of the matrix is as follows: P / Al is equal to 0.01-0.9, and Si / Al is equal to 0-50. The molecular sieve and the matrix are mixed for beating; then residual oil, animal and vegetable oil as well as naphtha can be made through spray drying and calcination; and the catalytic pyrolysis is carried out to prepare the lower olefins catalyst. The catalyst of the invention takes the residual oil, the animal and vegetable oil aswell as the naphtha as the raw materials, and uses the catalytic pyrolysis process to prepare the lower olefins, thereby opening up the new material source and the technological line for producing olefin, and having higher economic benefits.

Description

technical field [0001] The invention relates to a catalyst for preparing low-carbon olefins by fluidized bed catalytic cracking, in particular to a catalyst for preparing low-carbon olefins by fluidized bed catalytic cracking. [0002] The present invention also relates to a method for preparing the above-mentioned catalyst. [0003] The invention also relates to the use of the catalysts described above. Background technique [0004] Olefins are the basic raw materials of the organic chemical industry, and are currently mainly produced by high-temperature steam cracking of naphtha. Using naphtha and / or residual oil, and / or animal and vegetable oils as raw materials, ethylene, propylene and butene can be produced at a lower temperature through catalytic cracking reaction, and benzene, toluene and xylene are by-products at the same time Higher aromatic compounds improve the utilization rate of raw materials. The use of animal and vegetable oils as raw materials is a new sou...

Claims

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Application Information

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IPC IPC(8): B01J29/06B01J29/80B01J29/83C07C11/02
Inventor 谢鹏刘中民李铭芝张今令姜淑杰
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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