A metal-modified composite molecular sieve, its preparation method and its application in the reaction of methanol conversion to propylene and butene

A composite molecular sieve and metal modification technology, applied in molecular sieve catalysts, chemical instruments and methods, and hydrocarbon production from oxygen-containing organic compounds, can solve the problem of reducing the selectivity of propylene

Active Publication Date: 2018-12-11
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In order to realize the large-scale benefits of downstream utilization of butene, the selection of butene needs to be improved, and in order to ensure the economy of the project, it cannot be at the expense of reducing the selectivity of propylene

Method used

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  • A metal-modified composite molecular sieve, its preparation method and its application in the reaction of methanol conversion to propylene and butene
  • A metal-modified composite molecular sieve, its preparation method and its application in the reaction of methanol conversion to propylene and butene
  • A metal-modified composite molecular sieve, its preparation method and its application in the reaction of methanol conversion to propylene and butene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Embodiment 1: low content La modified SAPO-5 / SAPO-34 composite molecular sieve

[0058] 12 grams of pseudo-boehmite and 30.0 grams of deionized water are mixed and stirred to form an aluminum source solution, and 20 grams of phosphoric acid with a concentration of 85% by weight are mixed and stirred with 30.0 grams of deionized water to form a phosphorus source solution. The concentration of 2.5 grams is 40% by weight of silica sol and 4.5 grams of deionized water were mixed and stirred to form a silicon source solution.

[0059] Then, the phosphorus source solution is slowly added dropwise to the aluminum source solution to form a mixed solution of the aluminum source and the phosphorus source, stirred evenly for 1 hour, then the silicon source solution is added to the mixed solution of the aluminum source and the phosphorus source, and stirred evenly for 1 hour Hour, form the mixed solution of silicon source, aluminum source and phosphorus source, continue to stir for...

Embodiment 2

[0063] Embodiment 2: Low-content La modified symbiotic SAPO-5 / SAPO-34 composite molecular sieve

[0064] 12 grams of pseudo-boehmite and 30.0 grams of deionized water are mixed and stirred to form an aluminum source solution, and 20 grams of phosphoric acid with a concentration of 85% by weight are mixed and stirred with 30.0 grams of deionized water to form a phosphorus source solution. The concentration of 2.5 grams is 40% by weight of silica sol and 4.5 grams of deionized water were mixed and stirred to form a silicon source solution.

[0065] Then, the phosphorus source solution is slowly added dropwise to the aluminum source solution to form a mixed solution of the aluminum source and the phosphorus source, stirred evenly for 1 hour, then the silicon source solution is added to the mixed solution of the aluminum source and the phosphorus source, and stirred evenly for 1 hour Hour, form the mixed solution of silicon source, aluminum source and phosphorus source, continue t...

Embodiment 3

[0068] Example 3: The SAPO-5 / SAPO-34 composite molecular sieve modified by medium content La

[0069] 12 grams of pseudo-boehmite and 30.0 grams of deionized water are mixed and stirred to form an aluminum source solution, and 20 grams of phosphoric acid with a concentration of 85% by weight are mixed and stirred with 30.0 grams of deionized water to form a phosphorus source solution. The concentration of 2.5 grams is 40% by weight of silica sol and 4.5 grams of deionized water were mixed and stirred to form a silicon source solution.

[0070] Then, the phosphorus source solution is slowly added dropwise to the aluminum source solution to form a mixed solution of the aluminum source and the phosphorus source, stirred evenly for 1 hour, then the silicon source solution is added to the mixed solution of the aluminum source and the phosphorus source, and stirred evenly for 1 hour Hour, form the mixed solution of silicon source, aluminum source and phosphorus source, continue to s...

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PUM

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Abstract

The invention discloses a metal-modified SAPO-5 / SAPO-34 composite molecular sieve, particularly, metal-modified lanthanide series metal isomorphous substitution. The invention further discloses a preparation method of the metal-modified SAPO-5 / SAPO-34 composite molecular sieve. When the metal-modified SAPO-5 / SAPO-34 composite molecular sieve is used for a reaction of preparing low carbon olefins by using organic oxygen-containing compounds, the composite molecular sieve has favorable catalytic activity, excellent propylene and butene selectivity and long service life.

Description

technical field [0001] The invention relates to a metal-modified SAPO-5 / SAPO-34 composite molecular sieve and a preparation method thereof. The metal-modified composite molecular sieve is used for preparing low-carbon olefins from organic oxygen-containing compounds to increase the yield of propylene and butene. Background technique [0002] With the shortage of petroleum resources and rising prices, the production of ethylene and propylene is light, and C 4 Resources are increasingly scarce. [0003] The traditional methanol-to-olefins process (MTO) mainly uses ethylene and / or propylene as the target products, butene and C 5 + Components above hydrocarbons are only by-products, where C 4 The yield of mixed hydrocarbons is about 5.5%, the C 4 Among the mixed hydrocarbons, the content of 1,3-butadiene and isobutene is relatively low, and the main components are butene-1 and butene-2, which account for about 90%. (See "Market Demand and Processing Technology Analysis of C...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85C07C11/04C07C11/06C07C11/08C07C11/09C07C1/20
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 张新锋冯琦瑶邢爱华石玉林
Owner CHNA ENERGY INVESTMENT CORP LTD
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