Preparation method of MgO-modified silicoaluminophosphate fluidized bed catalyst

A silicoaluminophosphate fluidized bed and catalyst technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low ethylene selectivity, achieve high yield, avoid channel blockage, prevent The effect of reunion

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
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Problems solved by technology

[0013] The technical problem to be solved by the present invention is that the silicoaluminophosphate fluidized bed catalyst prepared in the prior art has the problem of low selectivity of ethylene and propylene in the process of methanol to light olefins, and a MgO modified silicoaluminophosphate is provided Preparation method of fluidized bed catalyst

Method used

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  • Preparation method of MgO-modified silicoaluminophosphate fluidized bed catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare 0.8 M magnesium acetate and 0.6 M oxalic acid solution, under continuous stirring, add the magnesium acetate solution to the oxalic acid solution according to the equivalent ratio, stir and age the solution for 12 hours, filter and dry at 110 °C to obtain magnesium oxalate .

[0021] The magnesium oxalate was calcined at 520°C for 4 hours to obtain a specific surface area of ​​420 m 2 / g of MgO.

[0022]

example 15

[0024]According to the proportion 15% (weight) SAPO-34 molecular sieve; 2% (weight) magnesium oxalate; 1% (weight) LAS; 17% (weight) kaolin; 7% (weight) aluminum sol; 58% (weight) deionized water Weigh the raw materials. Except for water, the proportions of raw materials in the proportioning here are dry basis weight ratios. Mix SAPO-34 molecular sieve with a certain amount of water, stir for 1 hour, stir thoroughly, and form a uniform molecular sieve suspension after high-speed shearing with a high-speed shear for 15 minutes; add aluminum sol to the suspension, and stir rapidly for 15 minutes. Minutes, use a high-speed shearing machine to cut for 15 minutes; add kaolin and magnesium oxalate, stir for 30 minutes, after reaching a uniform state, use a high-speed shearing machine for high-speed shearing and mixing for 45 minutes to obtain a suspension before spray drying. The particle size of the suspension was measured with a laser particle size analyzer, and the average parti...

Embodiment 3～8

[0027] The operation steps and experimental conditions are the same as in Example 2, wherein the additions of molecular sieve, kaolin and aluminum sol are unchanged, and the additions of magnesium oxalate and surfactant are changed. The MTO catalytic results of the obtained samples are shown in Table 1.

[0028]

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Abstract

The invention relates to a preparation method of an MgO-modified silicoaluminophosphate fluidized bed catalyst. According to the preparation method, the problem that ethylene and propylene are low in selectivity in the process for preparing low carbon olefin from methanol by virtue of the catalyst in the prior art is solved. The preparation method comprises the following steps: (a) uniformly mixing a molecular sieve, a binding agent, a matrix material, magnesium oxalate, a surfactant and a liquid medium to form suspension liquid; (b) shearing the suspension liquid at high speed until the sizes of 90% of particles in the suspension liquid are smaller than 8 microns; (c) drying the suspension liquid to form a microsphere catalyst; and (d) roasting the microsphere catalyst at high temperature to form a finished catalyst, wherein a magnesium oxalate precursor with the specific surface larger than 200 m<2> / gMgO can be obtained by virtue of roasting at 50 DEG C in the step (a). According to the technical scheme, the problem is well solved. The preparation method can be applied to the industrial production for preparing a low carbon olefin catalyst from a methanol or dimethyl ether raw material.

Description

[0001] technical field [0002] The invention relates to a preparation method of a MgO modified silicon aluminum phosphate fluidized bed catalyst. Background technique [0003] Ethylene and propylene are important basic organic chemical raw materials in the chemical industry, and play a pivotal role in the modern petroleum and chemical industries. In recent years, with the increasing shortage of global oil resources and the rising price of crude oil, the contradiction between supply and demand caused by the production of ethylene and propylene by traditional oil routes has become tense, and all countries are committed to developing new non-petroleum production of olefins. route. Among them, coal or natural gas passes through synthesis gas (CO+H 2 ) The process of producing light olefins via methanol is currently recognized as the most promising technical route. my country's energy structure, which is rich in coal resources and relatively scarce in petroleum resources, a...

Claims

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Application Information

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IPC IPC(8): B01J29/85C07C11/04C07C11/06C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 管洪波刘红星钱坤张玉贤
Owner CHINA PETROLEUM & CHEM CORP
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