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A kind of dechlorination method of alkylated oil

An alkylation oil and alkylation technology, which is applied in the treatment of hydrocarbon oil, petroleum industry, hydrogenation process, etc., can solve the problems of substandard product quality and unqualified products, so as to improve dechlorination efficiency and maintenance cost Low, well-conceived effects

Active Publication Date: 2021-01-05
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can not only satisfy the chlorine content of the oil produced by alkylation to meet the requirements of the blending components of motor gasoline, but also improve the dechlorination efficiency, and at the same time solve the problem of substandard product quality caused by the initial stage of the hydrodechlorination unit, and effectively solve the problem of crossover The problem of unqualified products or shortened operation period of the device caused by internal leakage of line valves

Method used

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  • A kind of dechlorination method of alkylated oil

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Comparison scheme
Effect test

Embodiment 1

[0050] According to the scheme of the present invention, a new alkylation unit is built. After the alkylation reaction is completed, the ionic liquid is separated by the settling tank 6, and then the feed pump, the heat exchanger 7 and the hydrogen are fully mixed and dissolved in the SX type static mixer, and then enter the hydrodechlorination reactor 10. The reaction conditions For: reaction pressure 1.5MPa﹑liquid hour volume space velocity 3.8h -1 , The reaction temperature is 143°C. After the reaction is over, it enters the first adsorption dechlorination device 11 to absorb and remove inorganic chlorides. The first adsorption dechlorination device 11 can be filled with a conventional industrial dechlorination agent, and its main component includes calcium oxide. The adsorption temperature of the adsorption dechlorination device is 142°C, and the adsorption pressure is 1.4MPa. Then the adsorbed and dechlorinated product enters the rectification tower 13 for rectificatio...

Embodiment 2

[0055] According to the scheme of the present invention, a new alkylation unit is built. After the alkylation reaction is completed, the ionic liquid is separated by the settling tank, and then the feed pump, the heat exchanger and the hydrogen are fully mixed and dissolved in the SX static mixer, and then enter the hydrodechlorination reactor. The reaction conditions are: reaction Pressure 1.6MPa﹑Liquid hour volume space velocity 4.2h -1 , The reaction temperature is 157°C. After the reaction is finished, it enters the first adsorption dechlorination device 11 to adsorb and remove inorganic chlorides. The first adsorption dechlorination device 11 can be filled with a conventional industrial dechlorination agent, and its main components include magnesium oxide and the like. The adsorption temperature of the adsorption dechlorination device is 156°C, and the adsorption pressure is 1.5 MPa. Then the adsorbed and dechlorinated product enters the rectification tower 13 for rect...

Embodiment 3

[0064] During the test operation, open the second valve 16 and the third valve 17 on the cross-line, and keep the second valve 16 and the third valve 17 at a small opening to simulate the internal leakage of the valve. (the first valve 15 is not opened), the chlorine content of the dechlorinated alkylate oil is greater than 10 ppm, but after the leak-proof pipeline is enabled (the first valve 15 is opened), the chlorine content of the dechlorinated alkylate oil is stable, as low as 1.0 ppm.

[0065] After calculation, under certain working conditions, when the catalyst performance is good (the product index is far lower than the control index), if there is an internal leakage of 1.7wt%, the chlorine content of the alkylate after dechlorination is greater than 10 ppm; In the later stage of use (the chlorine content of the alkylated oil after dechlorination is close to the quality index), if there is a slight internal leakage, the chlorine content of the product will not meet th...

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Abstract

The invention discloses a dechlorination method of alkylated oil. The dechlorination method comprises that an ionic liquid catalyst is separated after an alkylation reaction is completed, and the alkylated mixed product is subjected to hydrodechlorination and adsorption dechlorination before the alkylated mixed product enters a rectification tower, wherein the alkylated mixed product is directly introduced into the rectification tower when a cross line is arranged for isolating a hydrodechlorination reaction and adsorption dechlorination device from an alkylation system, an anti-leakage pipeline is arranged, one end of the anti-leakage pipeline is communicated to the cross line, and the other end of the anti-leakage pipeline is communicated to the outlet pipeline of an isobutane raw material conveying pump. With the method of the present invention, the chlorine content of the alkylated oil can meet the requirement of the vehicle gasoline blending component, the dechlorination efficiency is improved, the problem of the unqualified product quality at the initial starting stage of the hydrodechlorination device is solved, and the problem of unqualified product or shorted device operation period caused by the internal leakage of the cross line valve is effectively solved.

Description

technical field [0001] The invention relates to a method for dechlorination of alkylated oil, specifically dechlorinating alkylated oil with high chlorine content through hydrogenation and dechlorination treatment, which is especially suitable for the generation of ionic liquid alkylation process Oil. Background technique [0002] Alkylate oil is a common high-octane gasoline blending component. It has the characteristics of high octane number, good anti-knock performance, low vapor pressure, low sulfur content, and no olefins and aromatics. It is an ideal clean gasoline blending combined components. Alkylates are generally produced by reacting isobutane with olefins over an acid catalyst. There are many types of alkylation technologies, which can be divided into two categories: liquid acid alkylation and solid acid alkylation according to the phase state of the catalyst. Liquid acid alkylation technology includes hydrofluoric acid, sulfuric acid and ionic acid; solid aci...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/14
CPCC10G67/14C10G2300/201C10G2300/70
Inventor 徐大海牛世坤陈光李扬丁贺李士才崔国英
Owner CHINA PETROLEUM & CHEM CORP
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