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Catalyst for preparing propylene byproduct high-octane gasoline by taking methanol as raw material and preparation method of catalyst

A technology for by-product high-octane and catalysts, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of low octane number of by-product gasoline, low propylene selectivity, low catalyst activity, etc. problems, to achieve the effect of less by-products, high P/E weight ratio and high selectivity

Active Publication Date: 2015-01-28
丁泳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] 2. Low catalyst activity, poor stability and low propylene selectivity
[0014] 3. The by-product gasoline has a low octane number

Method used

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  • Catalyst for preparing propylene byproduct high-octane gasoline by taking methanol as raw material and preparation method of catalyst
  • Catalyst for preparing propylene byproduct high-octane gasoline by taking methanol as raw material and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] The crystallized ZSM-5 molecular sieve raw powder was roasted at 550°C for 2 hours to remove the template; mixed evenly with 10 times 0.2mol / L NaOH solution, heated to 70°C, and reacted at constant temperature for 1 hour; filtered and washed until NaOH 2 The mass fraction of O is less than 0.1%; add water to prepare molecular sieve slurry, add sulfuric acid solution, molecular sieve dry basis: H 2 O: H 2 SO 4 =1:10:0.2, heat up to 90°C, and react at constant temperature for 1 hour; filter and wash with water until the pH of the filtrate is greater than 6; add phosphoric acid and CeCl to the filter cake 3 The mixed aqueous solution was impregnated for 4 hours, dried, and calcined at 550°C for 3 hours to obtain modified molecular sieve A.

[0094] Modified molecular sieve A has a silicon-aluminum ratio of 300 and a specific surface area of ​​390m 2 / g, the total pore volume is 0.35mL / g, the mesopore volume accounts for 40% of the total pore volume, P 2 o 5 Mass perce...

Embodiment 2

[0097] The crystallized ZSM-5 molecular sieve raw powder was roasted at 550°C for 2 hours to remove the template agent; mixed evenly with 5 times the aqueous solution, added 0.1 times the dry basis of molecular sieve TEAOH, put it into a high-pressure reactor, and raised the temperature to 120°C. React at constant temperature for 12 hours; after cooling, filter and wash with water until Na 2 The mass fraction of O is less than 0.1%; add water to prepare molecular sieve slurry, add citric acid solution, molecular sieve dry basis: H 2 O: citric acid = 1:10:0.3, heat up to 90°C, and react at constant temperature for 1 hour; filter and wash with water until the pH of the filtrate is greater than 6; add ammonium phosphate and LaCl to the filter cake 3 The mixed aqueous solution was impregnated for 4 hours, dried, and calcined at 550°C for 3 hours to obtain modified molecular sieve B.

[0098] Modified molecular sieve B with a silicon-aluminum ratio of 200 and a specific surface ar...

Embodiment 3

[0101] Mix 70g (dry basis) modified molecular sieve A with 30g (dry basis) pseudo-boehmite evenly, add 1:1 nitric acid (nitric acid: carrier dry basis = 1mL: 100g) and water (water: carrier dry basis = 1 : 4) The prepared solution is kneaded into a dough, extruded in an extruder, dried at 120° C. for 12 hours, and calcined at 550° C. for 3 hours.

[0102] The above carrier was taken, impregnated with 30 g of gallium sulfate aqueous solution containing 3 g of gallium oxide at 65° C. for 2 hours, dried at 120° C. for 12 hours, and calcined at 550° C. for 4 hours to obtain catalyst A.

[0103] Example 4

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Abstract

The invention provides a catalyst for preparing propylene byproduct high-octane gasoline by taking methanol as a raw material and a preparation method of the catalyst. The catalyst belongs to a ZSM-5 crystallized aluminosilicate zeolite catalyst. The catalyst is prepared from the following raw materials in parts by mass: 30-89.9 parts of a modified porous-grade MFI structure molecular sieve, 10-60 parts of an inorganic oxide binding agent and 0.1-10 parts of metal oxide. The invention provides the catalyst for preparing the propylene byproduct high-octane gasoline by taking the methanol as the raw material, which has high propylene yield and high P / E weight ratio, few byproducts, good activity stability of the catalyst, high selectivity on propylene and high octane of the byproduct gasoline. The invention provides a preparation method of the catalyst for preparing the propylene byproduct high-octane gasoline by taking the methanol as the raw material, which has the advantages that the equipment investment is saved, the operation is simple and convenient and the production cost is low.

Description

technical field [0001] The invention relates to a catalyst for preparing propylene by-product high-octane gasoline by using methanol as a raw material and a preparation method thereof. It belongs to ZSM-5 crystalline aluminosilicate zeolite catalyst. Background technique [0002] Propylene is one of the most important basic raw materials in petrochemical industry. It is mainly used as a polymer monomer to prepare polypropylene products through polymerization reactions, or to prepare polypropylene products through copolymerization reactions with other monomers such as styrene, acrylonitrile, and various acrylates. Many polymer materials with different special functions. It is also used as a raw material for the synthesis of various organic chemical products such as acrylonitrile, propylene oxide, cumene and butanol. In the past 20 years, the demand for propylene and downstream products in domestic and foreign markets has increased significantly year by year. There has been...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/48B01J29/46C07C11/06C07C1/20C10G3/00
CPCY02P20/52Y02P30/20
Inventor 丁泳
Owner 丁泳
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