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Method for preparing olefin by conversion of methanol

A technology for methanol conversion and olefin production, which is used in the production of hydrocarbons from oxygen-containing organic compounds, ethylene production, organic chemistry, etc., can solve the problems of low ethylene and propylene selectivity, low ethylene and propylene yields, etc., and achieves catalyst performance improvement. , the effect of selective enhancement

Active Publication Date: 2005-12-07
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that there are low ethylene and propylene selectivity and low ethylene and propylene yields in the process of using silicon phosphorus aluminum molecular sieve to produce low-carbon olefins in the previous literature, and a new method for methanol conversion to olefins is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Synthesis of Zn-containing SAPO-34 Zeolite

[0021] According to the formula (0.5TEAOH+2.0Morpholine): 0.6SiO 2 :Al 2 o 3 :P 2 o 5 : 60H 2 O:0.03Zn(NO 3 ) 2 Weigh the raw materials.

[0022] A certain amount of rAl 2 o 3 ·H2O and orthophosphoric acid aqueous solution are fully stirred and mixed evenly to form a uniform jelly. Keeping the stirring state, sequentially add the composite template agent composed of zinc nitrate aqueous solution, silica sol, tetraethylammonium hydroxide and morpholine, and finally add a certain amount of deionized water. After fully stirring, a crystallization mixed liquid is formed. Crystallize the crystallization mixed solution obtained above at 200°C for 48 hours, and the product is centrifuged to obtain a solid product, which is dried in an oven at 110°C overnight. The XRD test shows that the obtained product is SAPO-34 molecular sieve, and There are no other impurity peaks, indicating that the metal ions have evenly entered t...

Embodiment 2

[0024] Molecular sieve catalyst preparation 1

[0025] The original powder prepared in Example 1 was roasted at 600°C for 3.0 hours to remove the template agent, tableted and crushed, and then sieved to take the part with a particle size of 20-40 mesh, numbered CS-01, pending evaluation.

Embodiment 3

[0027] Molecular sieve catalyst preparation 2

[0028] Get the former powder 6 grams that makes among the example 1, and rAl 2 o 3 ·H 2 O 6 grams, 2 grams of Squamia powder are mixed, add 9ml of 3wt% dilute nitric acid, carry out kneading, extrusion molding, drying at 120°C for 8 hours, roasting at 600°C for 3.0 hours, sieve after crushing to get the particle size part of 20-40 mesh , No. CS-02, pending evaluation.

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Abstract

The invention relates to a method for preparing olefin by conversion of methanol by using Zn-SAPO-34 molecular sieve and bonding agent as the catalyst for alkene production through methanol converstion, and employing a reaction temperature of 300-500 deg. C, a reaction pressure of atmospheric pressure, methanol weight space velocity of 1.0-10hr-1, the prepared low carbon alkene can be used in the industrial production of alkene from methanol.

Description

technical field [0001] The invention relates to a method for producing olefins by converting methanol, in particular to a method for producing ethylene and propylene by converting methanol. Background technique [0002] Ethylene and propylene play an important role in the modern chemical industry. Until now, most of ethylene and propylene come from petroleum processing. But for oil, there are problems of rising prices and unstable supply in the short term, and limited resource reserves in the long term, resulting in the problem of "oil crisis". Catalytic production of light olefins (MTO or DTO) from methanol or dimethyl ether as a raw material is the most promising new process to replace the petroleum route. The synthesis process of methanol and dimethyl ether is quite mature, and the sources of raw materials are abundant, such as coal, natural gas and solid waste can be passed through synthesis gas (CO+H 2 ) can be synthesized directly. For...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C11/04
CPCY02P30/20Y02P30/40
Inventor 刘红星谢在库陈庆龄陆贤张玉贤钱堃
Owner CHINA PETROLEUM & CHEM CORP
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