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Catalyst for preparing low-carbon olefin from light dydrocarbon and methanol mixtures

A catalyst and mixture technology, which is used in the production of hydrocarbons from oxygen-containing organic compounds, catalysts for physical/chemical processes, and hydrocarbon cracking to produce hydrocarbons, etc., to achieve the effects of increasing production, simplifying production processes, and maintaining reaction temperature.

Inactive Publication Date: 2012-12-12
LIAOYANG HUACHENG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a catalyst for producing low-carbon olefins from a mixture of light hydrocarbons and methanol that can solve the carbonization of the catalyst surface and has a long service life

Method used

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  • Catalyst for preparing low-carbon olefin from light dydrocarbon and methanol mixtures
  • Catalyst for preparing low-carbon olefin from light dydrocarbon and methanol mixtures
  • Catalyst for preparing low-carbon olefin from light dydrocarbon and methanol mixtures

Examples

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example 1

[0033]Dissolve 13.83 grams of 85% phosphoric acid in 140 milliliters of deionized water and stir well. 29.12 g of aluminum oxide was added to this phosphoric acid aqueous solution, and stirred to dissolve it into a uniform solution. Add 66.56 grams of tetraethyl silicate, 58 grams of triethylamine, and 18.3 grams of diethanolamine. Add the solution containing silica sol and other substances into the phosphoric acid-aluminum solution under vigorous stirring to prepare the gel. Put the gel into a stainless steel autoclave with a pressure of 3MPa, and crystallize at 120°C for 96 hours. Then the reaction product was filtered, washed, and dried at 120° C. for 2 hours to obtain the active component A of the catalyst of the present invention, which was confirmed to be SAPO-34 by X-ray diffraction. Weigh 25 grams of Na-Y molecular sieve (silicon to aluminum ratio 4.5), soak in 2 liters of 0.045% dilute nitric acid, and soak at 50°C for 26 hours. Filter and wash with deionized water...

example 2

[0035] Dissolve 66.87 grams of 85% phosphoric acid in 200 grams of deionized water and stir evenly. Slowly add 61.8 grams of silica sol containing 31% silicon dioxide into the phosphoric acid solution and stir evenly. Add 16.2 grams of aluminum ethoxide to 100 grams of water, add 41.4 grams of triethylamine and 47.25 grams of diethanolamine at the same time, and slowly add them to the silicon-phosphorus solution under vigorous stirring to prepare a gel. Put the gel into a stainless steel autoclave with a pressure of 3MPa, and crystallize at 240°C for 50 hours. Then the reaction product was filtered, washed, and dried at 100° C. for 8 hours to obtain the active component A of the catalyst of the present invention, which was confirmed to be SAPO-34 by X-ray diffraction. Weigh 95 grams of Na-Y molecular sieve (silicon-aluminum ratio 3.3), soak in 1 liter of 0.065% dilute nitric acid, soak at 50°C for 12 hours. Filter and wash with deionized water, suction filter free water, the...

example 3

[0037] Add 91.8 grams of 82.5% phosphoric acid into 164 milliliters of deionized water and dissolve evenly. Add 4.4 grams of pseudo-boehmite with a water content of 35% to 64 grams of deionized water, and stir evenly. Add 61.4 grams of diethanolamine and 20.2 grams of triethylamine to the phosphorus-aluminum solution, and stir evenly. Dissolve 36.73 grams of silica sol containing 24.5% silicon dioxide in 125 grams of deionized water, and stir evenly. Under vigorous stirring, slowly pour the dilute silica sol solution into the above solution to prepare a gel. Put the gel into a stainless steel autoclave with a pressure of 3MPa, and crystallize at 200°C for 60 hours. Then the reaction product was filtered, washed, and dried at 110° C. for 2 hours to obtain the active component A of the catalyst of the present invention, which was confirmed to be SAPO-34 by X-ray diffraction. Weigh 150 grams of Na-Y type molecular sieve (silicon to aluminum ratio 5.8), soak in 3 liters of 0.05...

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Abstract

The invention relates to a catalyst for preparing low-carbon olefin from light dydrocarbon and methanol mixtures, which is a substance formed by aluminosilicophosphate SAPO-34 molecular sieves and Na-Y type molecular sieves through being glued by amorphous aluminum silicate, the aluminosilicophosphate SAPO-34 molecular sieves use triethylamine and diethanol amine as template agents, the Na-Y typemolecular sieves are treated by nitric acid and rare earth nitrate, and the composition of the catalyst is a-SAPO-34.b-MH-Y.cAl4(SiO4)3, wherein a is the weight percentage of the SAPO-34 molecular sieves and is 10 to 30 percent, b is the weight percentage of the MH-Y type molecular sieves and is 5 to 20 percent, c is the weight percentage of the amorphous aluminum silicate and is 30 to 70 percent, and in addition, the sum of a, b and c is 100 percent. The catalyst has the advantages that the simultaneous catalysis of olefin preparation through light dydrocarbon steam cracking and olefin preparation through methanol conversion can be realized, the troubles caused by heat supply of steam cracking and heat release of olefin preparation through methanol are reduced, the olefin production process is simplified, the investment and the production operation cost are greatly saved, and simultaneously, the yield of low-carbon olefin in light dydrocarbon cracking products is improved.

Description

technical field [0001] The invention relates to a catalyst, especially a catalyst for preparing low-carbon olefins through a non-petroleum route. Background technique [0002] Those skilled in the art know that low-carbon olefins, ie, ethylene, propylene and butene, are important chemical raw materials, and their traditional preparation methods are obtained by steam cracking of light naphtha and liquefied petroleum gas. However, the method of steam cracking to produce olefins has high reaction temperature (about 750°C), high energy consumption (19.3GJ per ton of ethylene is produced by naphtha cracking; 25GJ is consumed by light diesel oil), and the yield is low (low Carbon olefin yield is 41%-43%), high carbide (5%-6%) and other problems. For this reason, someone invented the technology of producing olefins from methanol, which is favored because of its high yield of low-carbon olefins and its non-petroleum route. The technology of using methanol to olefins requires the u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85C07C11/04C07C11/06C07C11/08C07C9/10C07C9/04C07C9/06C07C9/08C07C1/20C07C4/06
CPCY02P20/52Y02P30/20Y02P30/40
Inventor 杨永然吴敏韩冰
Owner LIAOYANG HUACHENG CHEM