Hydrodechlorination method for alkylated oil

A technology for hydrodechlorination and alkylation of oil, which is applied in hydrotreating process, petroleum industry, gasoline stabilization, etc., can solve problems such as substandard product quality, meet product quality requirements, and avoid product unqualified stable period , the effect of overcoming the instability of heat exchange

Active Publication Date: 2019-04-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method can not only satisfy the chlorine content of oil produced by alkylation to meet the requirements of 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 start-up of the hydrodechlorination unit

Method used

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  • Hydrodechlorination method for alkylated oil

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Effect test

Embodiment 1

[0044] 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 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, the main component of which is calcium oxide. The adsorption temperature of the adsorption dechlorination device is 140°C, and the adsorption pressure is 1.4MPa. Then the adsorbed and dechlorinated product enters the rectification tower 13 for rectifica...

Embodiment 2

[0048] 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 1.6MPa﹑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 component is magnesium oxide. The adsorption temperature of the adsorption dechlorination device is 156°C, and the adsorption pressure is 1.5MPa. Then the adsorbed and dechlorinated product enters the rectification tower 13 for rectificatio...

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Abstract

The invention discloses a hydrodechlorination method for alkylated oil. The hydrodechlorination method comprises that an ionic liquid catalyst is separated after an alkylation reaction is completed; and the alkylated mixed product is sequentially subjected to hydrodechlorination, adsorption HCl-removal and rectification by a rectification tower. According to the method, at the start of operation,the alkylated mixed product first enters a rectification tower, and is rectified; the tower bottom material of the rectification tower is introduced into a hydrodechlorination reactor, and is subjected to hydrodechlorination; adsorption is performed by an adsorption hydrodechlorination device; the obtained material is introduced into the rectification tower for 5 min-24 h after the adsorption is completed; the direct introducing of the alkylated mixed product into the rectification tower is stopped, and the introducing of the tower bottom material of the rectification tower into the hydrodechlorination reactor is stopped; and the alkylated mixed product is directly introduced into the hydrodechlorination reactor, and is subjected to a normal hydrodechlorination reaction process. With the method of the present invention, the chlorine content can be reduced to less than 1 ppm after the alkylated oil with high chlorine ions is treated so as to be used as the high-quality vehicle gasolineblending component.

Description

technical field [0001] The invention relates to a method for hydrodechlorination of alkylated oil, specifically dechlorination of alkylated oil with high chlorine content through hydrogenation and dechlorination treatment, especially suitable for ionic liquid alkylation process produced 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 acid is mainl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14C10G45/04C10G7/02
CPCC10G7/02C10G45/04C10G67/14C10G2300/201C10G2300/4006C10G2300/70
Inventor 徐大海关明华丁贺李扬牛世坤李士才陈光
Owner CHINA PETROLEUM & CHEM CORP
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