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 proces

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
Comparison scheme
Effect test

Example Embodiment

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

[0047] The first step is to modify the molecular sieve, that is, exchange the molecular sieve with rare earth metal compounds.

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

[0049] In the third step, the above slurry is spray-dried to form 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 used in the reaction of preparing low-carbon olefins using residual oil, animal and vegetable oils, hydrogenation tail oil or / and naphtha as raw materials. The low-carbon olefins...

Example Embodiment

[0058] Example 1:

[0059] According to the ratio of Al:P=1:0.3, the Al 2 O 3 And H 3 PO 4 Mix to produce non-stoichiometric aluminum phosphate. Using this aluminum phosphate as a substrate (65wt%), mixed with LaZSM-5 molecular sieve (35wt%), spray-dried, and calcined at 400-600℃ to prepare a fluidized bed microsphere catalyst (which is the equilibrium catalyst described later) To distinguish between phases, the microsphere catalyst is called a fresh catalyst).

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

[0061]The result of the reaction on the micro-reactor:

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

[0063] When reacting at 670℃:

[0064]

[0065] Reaction results on a fixed fluidized ...

Example Embodiment

[0069] Example 2:

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

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

[0072]

[0073] Reaction results on a fixed fluidized bed at 660°C (other conditions are the same as in Example 1):

[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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