Dechlorination method for alkylated oil

Abstract

The invention discloses a dechlorination method for alkylated oil. The dechlorination method comprises that an ionic liquid catalyst is separated after an alkylation reaction is completed to obtain analkylated mixed product; the alkylated mixed product is directly subjected to hydrodechlorination without separation to generate a HCl-containing hydrogenation product; the HCl-containing hydrogenation product is adsorbed by an adsorption dechlorination device; the adsorbed product is introduced into a rectification tower, and is rectified; when a hydrodechlorination reactor is started, a heatedisobutane raw material is introduced into the hydrodechlorination reactor, the obtained material passes through the adsorption dechlorination device, the obtained product enters the rectification tower for 20 min-24 h, preferably 1-10 h, and the introduction of the isobutane raw material is stopped; and the alkylated mixed product is introduced into the hydrodechlorination reactor, and is subjected to a normal hydrodechlorination reaction. With the method of the invention, the start-up time can be shortened, the product quality requirement at the initial stage of the hydrodechlorination can beensured, the chlorine content of the product after the normal operation of hydrodechlorination can achieve or be rapidly decreased to less than 1 ppm, and the obtained product can be used as the high-quality vehicle gasoline blending component.

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...

AI Technical Summary

Problems solved by technology

The whole technological process is relatively complicated, and the investment and operating costs are relatively high.

[0008] In addition, during the start-up process of the hydrodechlorination unit, because the reaction conditions and catalyst performance have not reached the state required for the reaction, the hydrodechlorination products generally do not meet the quality indicators

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