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Etherification method for producing clean gasoline

A technology of etherification and gasoline, which is applied in cracking, petroleum industry, catalytic cracking, etc. It can solve the problems of complex process and many process steps, and achieve the effect of increasing octane number, multi-operation flexibility and good adaptability

Active Publication Date: 2008-08-20
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • 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 for producing clean gasoline
  • Etherification method for producing clean gasoline

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Embodiment 1

[0034] 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 enters the etherification reactor, where it contacts and reacts with etherification catalyst A, and the reaction product enters the stabilizing tower for fractionation, and the gas component is obtained from the top of the stabilizing tower, and MTBE is obtained at the bottom of the stabilizing tower. The etherification reaction conditions are: the alcohol / ene mass ratio is 0.5, the reaction temperature is 120°C, and the reaction pressure is 1.5MPa. 4 Distillate meter, the weight space velocity of feed liquid is 2.0h -1 , the operating conditions of the stable tower are: tower top temperature 40°C, tower bottom temperature 140°C, tower pressure 1.5MPa, tower top reflux ratio 5, the reaction result is methanol conversion 100%, and MTBE selectivity > 99%.

Embodiment 2

[0038] The hydrocarbon etherification raw material used in this example is the same catalytic cracking deethanized gasoline 1 as that of Comparative Example 1. After being mixed with methanol, the catalytic cracked deethanized gasoline 1 enters the etherification reactor and contacts with the catalytic cracking catalyst GOR-II. reaction, the reaction product enters the stabilizing tower for 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 etherification reaction conditions are: the alcohol / hydrocarbon mass ratio is 0.2, the reaction temperature is 100°C, the reaction pressure is 1.7MPa, and the weight space velocity of the feed liquid is 2.0h in terms of deethanized gasoline -1 , the operating conditions of the stable tower are: tower top temperature 50°C, tower bottom temperature 160°C, tower pressure 1.5MPa, tower top reflux ratio 5. ...

Embodiment 3

[0043] The hydrocarbon etherification raw material used in this example is the same catalytic cracking deethanized gasoline 2 as that of Comparative Example 2. After being mixed with methanol, the catalytic cracked deethanized gasoline 2 enters the etherification reactor and contacts with the catalytic cracking catalyst CGP-1 reaction, the reaction product enters the stabilizing tower for 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 etherification reaction conditions are: the alcohol / hydrocarbon mass ratio is 0.3, the reaction temperature is 110°C, the reaction pressure is 1.7MPa, and the weight space velocity of the feed liquid is 6.0h in terms of deethanized gasoline -1 , the operating conditions of the stable tower are: tower top temperature 50°C, tower bottom temperature 170°C, tower pressure 1.7MPa, tower top reflux ratio 5.

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Abstract

The invention provides an etherification method for producing clean gasoline, hydrocarbon etherification raw materials are mixed with fatty alcohol, which are put into an etherification reactor for contacting and being in reaction with the etherification catalyst, without separation, the reaction products are directly put into a catalytic cracking stabilizer for fractionation, separated liquefied gas can be got from the top of the tower, while stabilized gasoline containing ether compound is got 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 effectively combines the hydrocarbon etherification and existing catalytic cracking stabilizing system together, fully makes use of the catalytic cracking stabilizing system to separate the etherification reaction products, which not only effectively reduces the energy consumption and operating cost, but also gets the stabilized gasoline with low content of olefin, the high octane value and qualified vapor pressure.

Description

technical field [0001] The invention relates to a method for the etherification reaction of hydrocarbon raw materials and fatty alcohols, more specifically, a method for combining the etherification method of hydrocarbons with a catalytic cracking absorption stabilization system. 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...

Claims

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Application Information

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IPC IPC(8): C10G29/22C10G11/00
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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