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Etherification method integrated with catalytic cracking absorption stable system

An absorption stabilization system and catalytic cracking technology, which is applied in the petroleum industry and hydrocarbon oil treatment, can solve the problems of multiple process steps and complex processes, achieve multi-operation flexibility, increase octane number, save energy consumption and operating costs Effect

Active Publication Date: 2008-08-20
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
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  • Application Information

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Problems solved by technology

The process is complicated and the process steps are many

Method used

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  • Etherification method integrated with catalytic cracking absorption stable system
  • Etherification method integrated with catalytic cracking absorption stable system

Examples

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Effect test

Embodiment 1

[0035] The hydrocarbon etherification raw material that present embodiment adopts is the C that contains 20% isobutene 4 Fraction, C 4 The distillate is mixed with methanol and then enters the stabilizing tower. In the reaction section, it contacts with etherification catalyst A and undergoes fractional distillation. The gas component is obtained from the top of the stabilizing tower, and MTBE is obtained at the bottom of the stabilizing tower. The operating conditions are: alcohol / ene mass ratio is 0.5, tower top temperature is 40°C, tower bottom temperature is 140°C, reaction section inlet temperature is 120°C, tower pressure is 1.5MPa, tower top reflux ratio is 6, expressed as C 4 Distillate meter, the weight space velocity of feed liquid is 2.0h -1 , The result of the reaction is that the conversion rate of methanol is 100%, and the selectivity of MTBE formation is >99%.

Embodiment 2

[0037] The hydrocarbon etherification raw material that present embodiment adopts is the C that contains 20% isobutene 4 Fraction, C 4 The distillate is mixed with methanol and then enters the stabilizing tower. In the reaction section, it contacts and reacts with the catalytic cracking catalyst DOCP and undergoes fractional distillation. The gas components are obtained from the top of the stabilizing tower, and MTBE is obtained at the bottom of the stabilizing tower. The operating conditions are: alcohol / ene mass ratio is 0.5, tower top temperature is 60°C, tower bottom temperature is 140°C, reaction section inlet temperature is 120°C, tower pressure is 1.5MPa, tower top reflux ratio is 5, expressed as C 4 Distillate meter, the weight space velocity of feed liquid is 2.0h -1 , The result of the reaction is that the conversion rate of methanol is 100%, and the selectivity of MTBE formation is >99%.

Embodiment 3

[0041] The hydrocarbon etherification raw material used in this example is the same catalytic cracking deethanized gasoline 1 as in Comparative Example 1. After the catalytic cracked deethanized gasoline is mixed with methanol, it enters the stabilization tower and contacts with the catalytic cracking catalyst GOR-II in the reaction section. Reaction and fractional distillation, liquefied gas is obtained from the top of the stabilizing tower, and stable gasoline containing ether compounds is obtained at the bottom of the stabilizing tower. The operating conditions are: the mass ratio of alcohol / hydrocarbon is 0.2, the temperature at the top of the tower is 40°C, the temperature at the bottom of the tower is 160°C, the temperature at the inlet of the reaction section is 120°C, the pressure of the tower is 1.5MPa, and the reflux ratio at the top of the tower is 5. Gasoline meter, when feeding liquid, the weight space velocity is 2.0h -1 .

[0042] The result of the reaction is ...

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Abstract

The invention provides an etherification method which integrates a catalytic cracking absorbing stabilizing system; after being mixed with fatty alcohol, hydrocarbon etherification raw materials are sent into a catalytic cracking stabilizer; during the reaction period in the catalytic cracking stabilizer, the materials are in contact with the etherification catalyst for reaction and fractionation, separated liquefied gas can be obtained from the top of the stabilizer, while stabilized gasoline containing ether compound is obtained from the bottom of the stabilizer, the etherification catalyst is chosen from one or a plurality of strong acid cation exchange resin, zeolite catalyst and heteropoly acid catalyst. The method fully makes use of the mass transfer and heat transfer conditions of the catalytic cracking stabilizing system, which does not only reduce the energy and material consumption, but also obtains the stabilized gasoline with low content of olefin, high octane value and qualified vapor pressure; the method has great suitability towards the characteristic that domestic catalytic gasoline has high content of olefin, which can provide more operating flexibility for refineries to produce gasoline of high index.

Description

technical field [0001] The invention relates to a method for the etherification reaction of hydrocarbon raw materials and fatty alcohols in a catalytic cracking stabilization tower under the catalysis of an etherification catalyst. Background technique [0002] In recent years, with the increasingly stringent environmental protection regulations, countries and regions around the world have increasingly strict restrictions on the content of olefins in gasoline, and the market's demand for high-grade gasoline has also increased with the development of the automobile market. Since January 2003, my country has implemented the national standard (GB 17930-1999) of "Unleaded Gasoline for Vehicles" nationwide. This standard limits the olefin content to no more than 35% by volume. It is expected that this limit will be further reduced in the future. Nearly 80% of the gasoline in my country comes from the catalytic cracking process, and the remaining gasoline has few components and po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G57/00
Inventor 谢文华邢恩会刘强慕旭宏罗一斌舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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