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Method for Cracking of C6-alkanes

A C6-alkane and catalyst technology, which is applied in the field of C6-alkane cracking, can solve the problems of poor stability and low catalytic activity, and achieve good stability and good technical effects

Active Publication Date: 2020-03-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention relates to a method for C6 alkane cracking, the main technical problem to be solved is the low catalytic activity and poor stability of the C6 alkane cracking reaction in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation method of mercerized / ZSM-12 molecular sieve:

[0021] The first step, 35.22 grams of water glass, 1.1 grams of sodium hydroxide, 6.45 grams of solid aluminum sulfate, mixed with 141 grams of distilled water, then added ammonia (containing NH 3 25.5wt%) 10g, mix well, put into reaction kettle, crystallize at 180°C for 48 hours, cool to room temperature after crystallization, filter and wash, then put into oven and dry at 100°C for 3-4 hours to obtain mercerization Zeolite raw powder.

[0022] Second step, get 25.6g of silica sol (wt40%), sodium metaaluminate 0.25g, sodium hydroxide 1g, deionized water 40g, 30wt% tetraethylammonium bromide 9.5g, 30wt% tetraethylammonium hydroxide 3.9g, 30wt% tetraethylammonium chloride 3.25g mixed, stirred at room temperature. Adjust the pH to 13 with 10% aqueous sodium hydroxide solution and let stand for 6 hours. Then add 9 grams of mordenite seed crystals synthesized in the first step, stir well, put it into the reaction...

Embodiment 2

[0027] Preparation method of mercerized / ZSM-12 molecular sieve:

[0028] The first step, 35.22 grams of water glass, 1.1 grams of sodium hydroxide, 6.45 grams of solid aluminum sulfate, mixed with 141 grams of distilled water, then added ammonia (containing NH 3 25.5wt%) 10g, mix well, put into reaction kettle, crystallize at 180°C for 48 hours, cool to room temperature after crystallization, filter and wash, then put into oven and dry at 100°C for 3-4 hours to obtain mercerization Zeolite raw powder.

[0029] Second step, get 25.6g of silica sol (wt40%), sodium metaaluminate 0.25g, sodium hydroxide 1g, deionized water 40g, 30wt% tetraethylammonium bromide 9.5g, 30wt% tetraethylammonium hydroxide 3.9g, 30wt% tetraethylammonium chloride 3.25g mixed, stirred at room temperature. Adjust the pH to 13 with 10% aqueous sodium hydroxide solution and let stand for 6 hours. Then add 12 grams of mordenite seed crystals synthesized in the first step, stir well, put it into a reaction ...

Embodiment 3

[0034] Preparation method of mercerized / ZSM-12 molecular sieve:

[0035]The first step, 35.22 grams of water glass, 1.1 grams of sodium hydroxide, 6.45 grams of solid aluminum sulfate, mixed with 141 grams of distilled water, then added ammonia (containing NH 3 25.5wt%) 10g, mix well, put into reaction kettle, crystallize at 180°C for 48 hours, cool to room temperature after crystallization, filter and wash, then put into oven and dry at 100°C for 3-4 hours to obtain mercerization Zeolite raw powder.

[0036] Second step, get 25.6g of silica sol (wt40%), sodium metaaluminate 0.25g, sodium hydroxide 1g, deionized water 40g, 30wt% tetraethylammonium bromide 9.5g, 30wt% tetraethylammonium hydroxide 3.9g, 30wt% tetraethylammonium chloride 3.25g mixed, stirred at room temperature. Adjust the pH to 13 with 10% aqueous sodium hydroxide solution and let stand for 6 hours. Then add 8 grams of mordenite seed crystals synthesized in the first step, stir well, put it into a reaction ke...

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PUM

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Abstract

The invention relates to a pyrolysis method for a C6 alkane, and mainly solves the technical problems of low catalytic activity and poor stability in a pyrolysis reaction of the C6 alkane in the priorart. The method provided by the invention better solves the problems by adopting the technical scheme including the steps of using a symbiotic composite material of ZSM-12 (MTW) and mordenite (MOR) as a catalyst, and under the catalytic reaction conditions of the reaction temperature of 270-550 DEG C, and the reaction pressure of 0.01-1MPa, performing a contact reaction on a raw material and a eutectic molecular sieve catalyst, wherein the C6 alkane is used as a raw material; and the used catalyst comprises the following components in parts by weight: a) 30-100 parts of a mordenite / ZSM-12 symbiotic composite molecular sieve material with the molar ratio of Si to Al of less than 100, and the weight content of the ZSM-12 molecular sieve of 10-50%; and b) 0-70 parts of a binder; and the method can be used in the industrial production of light olefins.

Description

technical field [0001] The invention relates to a method for cracking C6 alkanes. Background technique [0002] Today's petrochemical industry has developed into one of the key pillar industries that promote the economic development of various countries, and as the core of petrochemical industry and the most important basic raw materials of petrochemical industry - low-carbon olefins: ethylene, propylene, the amount of its output has become a The "barometer" of the country's petrochemical and economic development level. In the petroleum refining industry, operations such as catalytic cracking have been commercialized as the primary route for the synthesis of lower olefins from hydrocarbonaceous feedstocks. [0003] Since the 1960s, molecular sieves have been used as catalytic cracking catalysts. Due to their good thermal stability, high catalytic activity and high selectivity, they have been widely used in catalytic cracking reactions. Commonly used zeolite molecular sieve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G11/05B01J29/80
CPCB01J29/18B01J29/7034B01J29/80C10G11/05C10G2300/1081
Inventor 黄政金国杰高焕新杨洪云刘远林汪超丁琳康陈军
Owner CHINA PETROLEUM & CHEM CORP