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Preparation method of molecular sieve-containing catalyst

A molecular sieve and catalyst technology, applied in the field of catalyst preparation, can solve problems such as singleness and unavoidable shortcomings, and achieve the effects of increasing selectivity, good selectivity and activity stability, and increasing loading capacity.

Active Publication Date: 2014-08-06
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The above modification methods are single organometallic modification or rare earth modification, so the disadvantages brought about by alkali metal modification and rare earth modification cannot be avoided

Method used

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  • Preparation method of molecular sieve-containing catalyst
  • Preparation method of molecular sieve-containing catalyst

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preparation example Construction

[0015] The invention provides a method for preparing a catalyst containing molecular sieve, which is characterized in that it includes the step of modifying molecular sieve and the step of introducing matrix, and the step of modifying molecular sieve is to use molecular sieve, one selected from water, alcohol and ester After mixing one or more kinds of substances and organic bases evenly, they are treated in a sealed reaction kettle at 100-250°C under autogenous pressure, and the products obtained from the treatment are recovered, and then exchanged with rare earth ion salts.

[0016] In the preparation method provided by the present invention, wherein said step of modifying molecular sieves, this step comprises mixing molecular sieves, one or more substances selected from water, alcohols, esters, and organic bases uniformly, and then It is treated at 100-250°C under autogenous pressure, and the product obtained from the treatment is recovered, and then exchanged with rare eart...

Embodiment 1

[0031] This example illustrates the modification step of β molecular sieve in the method provided by the present invention.

[0032] 10g β molecular sieve (provided by Zhoucun Catalyst Factory, SiO 2 / Al 2 o 3 =25,Na 2 O%<0.1%, roasting at 550°C for 2h) Add 10g of diethylamine and 50g of ethanol, add them to the pressure melting bomb, and heat at 120°C for 24h. Suction filter, wash, and dry the obtained sample at 110°C, then add 5 g of the above-mentioned organic base modified sample to 300 g of water, add 40 g of lanthanum nitrate hexahydrate, exchange at 50°C for 5 hours, wash and suction filter, and dry at 110°C, the obtained The sample is counted as A, and the results of XRD and BET characterization are listed in Table 1.

Embodiment 2

[0037] This example illustrates the modification steps of the Y-type molecular sieve in the method provided by the present invention.

[0038] 10g Y molecular sieve (provided by Changling Catalyst Factory, SiO 2 / Al 2 o 3 =5,Na 2 O%<0.1%, roasting at 550°C for 2h) Add 10g of triethylamine and 50g of methanol, add them to the pressure melting bomb, and heat at 120°C for 144h. Suction filter, wash, and dry the obtained sample at 110°C, then add 5 g of the above-mentioned organic base modified sample to 200 g of water, add 30 g of cerium nitrate hexahydrate, exchange at 60°C for 4 hours, wash and suction filter, and dry at 110°C, the obtained The sample is counted as B, and the results of XRD and BET characterization are listed in Table 1.

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Abstract

The invention provides a preparation method of a molecular sieve-containing catalyst. The preparation method comprises molecular sieve modification and base introduction processes. The molecular sieve modification process comprises the following steps of mixing a molecular sieve, one or more of water, alcohol and ester, and organic base to obtain a uniform mixture, treating the mixture in a sealed reactor at a temperature of 100-250 DEG C under self-generated pressure, recovering the product obtained by the treatment, and carrying out rare earth ion salt exchange. In the molecular sieve-containing catalyst obtained by the preparation method, an exchange degree of rare earth ions in the molecular sieve and interaction between the rare earth ions and aluminum atoms in the molecular sieve are improved so that molecular sieve channel unblocking is guaranteed, a rare earth load capacity is substantially improved and the selectivity of trimethylpentane as a target product and a catalyst life are substantially improved especially in an isobutane / butylene alkylation reaction.

Description

technical field [0001] The invention relates to a preparation method of a catalyst containing an organic base and a rare earth co-modified molecular sieve. Background technique [0002] Molecular sieving can be achieved to a certain extent by utilizing the specific pore structure and pore size difference of zeolite. Since the molecular dynamics diameter difference that needs to be identified in research and production practice is far less than 0.1nm, and the pore size of zeolite changes in a jumping manner, with a change range of more than 0.1nm, it is difficult to fine-tune its pore size through traditional one-time synthesis methods Change. On the other hand, in order to improve the adsorption and catalytic selectivity of zeolite molecular sieves, the surface structure and acid properties of zeolite need to be modified. The modification methods mainly include: (1) cation exchange of zeolite molecular sieve; (2) heteroatom isomorphic replacement of zeolite molecular sieve...

Claims

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Application Information

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IPC IPC(8): B01J29/80B01J29/70B01J29/85C07C9/21C07C2/58
Inventor 付强李永祥胡合新慕旭宏张久顺舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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