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Sidetrack etherification method integrated with catalytic cracking absorption stable system

A technology of absorption stabilization system and catalytic cracking, which is applied in the refining and cracking process treatment of multi-stage series connection, petroleum industry, refined hydrocarbon oil, etc. Multiple operational flexibility, olefin content reduction effect

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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The process is complicated and the process steps are many

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  • Sidetrack etherification method integrated with catalytic cracking absorption stable system
  • Sidetrack etherification method integrated with catalytic cracking absorption stable system
  • Sidetrack etherification method integrated with catalytic cracking absorption stable system

Examples

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Effect test

Embodiment 1

[0053] The hydrocarbon etherification raw material that present embodiment adopts is the C that contains 20% isobutene 4 Fraction, C 4 After the distillate is mixed with methanol, it enters the stabilizing tower, and a side line outlet is provided at 80% of the tower height of the stabilizing tower. The liquid phase stream extracted from the side line outlet is mixed with methanol and then enters the etherification reactor, and is mixed with etherification catalyst A Contact, at alcohol / hydrocarbon mass ratio 0.5, reaction temperature 80°C, reaction pressure 1.7MPa, based on the liquid phase flow at the side outlet, the weight space velocity of the feed liquid is 2.0h -1 The reaction is carried out under certain conditions, and the reaction product is not separated, and then enters the tower from the side line feed port at 50% of the tower height of the stabilized tower for fractionation, and the gas component is obtained from the top of the stabilized tower. MTBE is obtained...

Embodiment 2

[0057] The hydrocarbon etherification raw material used in this embodiment is the same catalytic cracking deethanized gasoline 1 as that of Comparative Example 1. After the catalytic cracked deethanized gasoline 1 is mixed with methanol, it enters the stabilizing tower. There is a side line outlet, and the liquid phase stream drawn from the side line outlet is mixed with methanol and then enters the etherification reactor, where it contacts with the catalytic cracking catalyst GOR-II, at an alcohol / hydrocarbon mass ratio of 0.2, a reaction temperature of 100°C, and a reaction pressure of 1.5MPa, based on the liquid phase flow at the side line outlet, the weight space velocity of the feed liquid is 4.0h -1 The reaction is carried out under the condition of the stable tower, and the reaction product is not separated from the side line feed port at 50% of the tower height of the stable tower and then enters the tower for fractionation. The operating conditions of the stable tower ...

Embodiment 3

[0062] The hydrocarbon etherification raw material used in this embodiment is the same catalytic cracking deethanized gasoline 2 as in Comparative Example 2, and the catalytic cracked deethanized gasoline 2 enters the pre-etherification reactor after being mixed with methanol, and contacts with catalytic cracking catalyst DOCP, At an alcohol / hydrocarbon mass ratio of 0.1, a reaction temperature of 120°C, and a reaction pressure of 1.5 MPa, the weight space velocity of the feed liquid is 18.0 h based on hydrocarbon etherification raw materials -1 react under the conditions. The reaction result is based on olefins, the olefin polymerization selectivity is ≤0.5%, the diolefins in the reaction product are ≤100 μg / g, and the alkali nitrogen content is ≤1 μg / g.

[0063] The reaction product of the pre-etherification reactor enters the stabilizing tower for fractional distillation, and a side line outlet is set at 60% of the tower height of the stabilizing tower, and the liquid phase...

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Abstract

The invention provides a lateral line etherification method which integrates a catalytic cracking absorbing stabilizing system; hydrocarbon etherification raw materials are sent into a catalytic cracking stabilizer for fractionation, the catalytic cracking stabilizer is provided with a lateral line discharge hole from the position about 95 percent of the height to about 50 percent of the height of the stabilizer, the liquid material and fatty alcohol from the lateral line discharge hole are mixed together to be sent into an etherification reactor for reaction with the effect of etherification catalyst, the reaction products are sent into the stabilizer for fractionation without separating from the lateral line feeding hole under the lateral line discharge hole, 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, 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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Patent Type & Authority Applications(China)
IPC IPC(8): C10G55/06C10G29/22
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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