Etherification method combined with catalytic cracking absorption stable system

An absorption stabilization system and catalytic cracking technology, applied in the treatment of hydrocarbon oil, petroleum industry, etc., can solve the problems of complex process and many process steps, and achieve the effect of increasing octane number, more operational flexibility, and reducing olefin content

Active Publication Date: 2008-08-20
CHINA PETROLEUM & CHEM CORP
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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 combined with catalytic cracking absorption stable system
  • Etherification method combined with catalytic cracking absorption stable system

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Embodiment 1

[0037] The hydrocarbon etherification raw material that present embodiment adopts is the C that contains 20% isobutene 4 Fraction, C 4 The distillate is contacted and reacted with catalyst A in the pre-etherification reactor, and the reaction conditions are that the reaction temperature is 130°C, the reaction pressure is 1.5MPa, and the weight space velocity of the feed liquid is 2.0h -1 , the reaction result is that the conversion rate of isobutene is ≤ 1%, the diene in the reaction product is ≤ 100 μg / g, and the content of alkali nitrogen is ≤ 1 μg / g.

[0038] The reaction product obtained above is mixed with methanol and then enters the stabilizing tower, where it contacts and reacts with catalyst A in the reaction section 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...

Embodiment 2

[0040] The hydrocarbon etherification raw material used in this embodiment is liquefied gas, and the content of isobutene in the liquefied gas is 15%. After the liquefied gas is mixed with methanol, it contacts and reacts with the catalytic cracking catalyst DOCP in the pre-etherification reactor. The reaction condition is alcohol / The hydrocarbon mass ratio is 0.3, the reaction temperature is 100°C, the reaction pressure is 1.7MPa, and the weight space velocity of the feed liquid is 6.0h -1 , the reaction result is based on olefins, olefin polymerization selectivity ≤ 0.5%, dienes in the reaction product ≤ 100 μg / g, alkali nitrogen content ≤ 1 μg / g.

[0041] The reaction product obtained above is mixed with methanol and then enters the stabilizing tower. In the reaction section, it contacts and reacts with the strong acid cation exchange resin Amberlyst35 and conducts fractionation. The gas component is obtained from the top of the stabilizing tower, and MTBE is obtained at th...

Embodiment 3

[0045] The hydrocarbon etherification raw material used in this example is the same catalytic cracking deethanized gasoline raw material 1 as in Comparative Example 1. After the catalytic cracked deethanized gasoline is mixed with methanol, it contacts with catalytic cracking catalyst CGP-1 in the pre-etherification reactor Reaction, the reaction conditions are that the alcohol / hydrocarbon mass ratio is 0.1, the reaction temperature is 120°C, the reaction pressure is 1.5MPa, and the weight space velocity of the feed liquid is 2.0h -1 , the reaction result is based on olefins, olefin polymerization selectivity ≤ 0.5%, dienes in the reaction product ≤ 100 μg / g, alkali nitrogen content ≤ 1 μg / g.

[0046] The reaction product obtained above is mixed with methanol and then enters the stabilizing tower. In the reaction section, it contacts and reacts with the etherification catalyst strong acidic cation exchange resin Amberlyst35 and conducts fractional distillation. The liquefied ga...

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Abstract

The invention provides a hydrocarbon etherification method which is combined with a catalytic cracking absorbing stabilizing system; after being mixed with the chosen fatty alcohol, the hydrocarbon etherification raw materials are sent into a pre-etherification reactor, and reacts with a pre-etherification catalyst in a contact way; without separation, the reaction products are directly put into catalytic cracking stabilizer after being mixed with the chosen fatty alcohol; during the reaction period in the catalytic cracking stabilizer, the reaction products react in contact with the etherification catalyst for 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 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 邢恩会谢文华刘强慕旭宏罗一斌舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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