Method for reducing mercaptan content of light oil product

A light oil and mercaptan technology, which is applied in the petroleum industry, refined hydrocarbon oil, hydrocarbon distillation, etc., can solve the problems of large investment, high environmental pressure, and high cost of hydrogenation, and achieve low operating energy consumption, reduced content, The effect of mild operating conditions

Active Publication Date: 2019-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Although a lot of progress has been made in the research on demercaptanization of oil products, there are still some unsatisfactory aspects in the existing demercaptanization process, for example: the Merox process will produce a large amount of waste lye, and the deodorization efficiency needs to be further improved; membrane separation The hydrogenation method also faces the problem of producing a large amount of waste lye; the hydrogenation method has the functions of desulfurization and deodorization thoroughly, but the hydrogenation method has a large investment, high cost, and high energy consumption; the adsorption method faces the problem of desorption and regeneration of the adsorbent , the environmental pressure is relatively large

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  • Method for reducing mercaptan content of light oil product
  • Method for reducing mercaptan content of light oil product
  • Method for reducing mercaptan content of light oil product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0093] The raw material oil that embodiment 1-3 adopts is simulated gasoline, and simulated gasoline is nine kinds of mercaptans (that is, 3-methylbutanethiol, 2-methylbutanethiol, n-pentylmercaptan, n-butylmercaptan, n-hexanethiol, 2-butanethiol, 2-propanethiol, cyclohexylthiol and 1,2-ethanedithiol) dissolved in isooctane, wherein the total mass content of the nine thiols is 45335ppm. Dilute the mass concentration of simulated gasoline by 50 times to obtain diluted simulated gasoline.

[0094] According to the addition amount listed in Table 1, electron-deficient alkenes and oil-soluble organic bases were added to the diluted simulated gasoline, and the reaction was carried out under the conditions listed in Table 1. Measure the mercaptan content in the reaction mixture that reaction obtains, and calculate the removal rate of mercaptan, the result is listed in Table 1.

[0095] Table 1

[0096]

[0097] 1 : Molar ratio of mercaptans to diluted simulated gasoline

[0...

Embodiment 4-5

[0100] The raw material oil used in Examples 4-5 is catalytically cracked gasoline, its final boiling point is 200° C., and the mass content of mercaptan is 200 ppm.

[0101] (1) According to the addition amount listed in Table 2, electron-deficient alkenes and oil-soluble organic bases were added to catalytic cracking gasoline, and the reaction was carried out under the conditions listed in Table 2.

[0102] (2) The reaction mixture obtained in step (1) is subjected to atmospheric distillation, and the cuts from the initial boiling point to the final boiling point of 200° C. are collected, and the collected cuts are used as catalytic cracking gasoline after sweetening. The content of mercaptans in FCC gasoline after sweetening was measured, and the removal rate of mercaptans was calculated. The results are listed in Table 2.

Embodiment 6-7

[0110] The raw material oil used in Examples 6-7 is aviation kerosene, its final boiling point is 250° C., and the mass content of mercaptan is 90 ppm.

[0111] (1) According to the addition amount listed in Table 3, electron-deficient alkenes and oil-soluble organic bases were added to aviation kerosene, and the reaction was carried out under the conditions listed in Table 3.

[0112] (2) The reaction mixture obtained in step (1) is subjected to atmospheric distillation, and the cuts from the initial boiling point to the final boiling point are collected at 250° C., and the collected cuts are used as aviation kerosene after sweetening, and the mercaptan content is measured therein. And calculate the removal rate of mercaptans, the results are listed in Table 3.

[0113] table 3

[0114]

[0115] 1 : Molar ratio to mercaptans in aviation kerosene

[0116] 2 : relative to the weight percent of mercaptan in aviation kerosene

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Abstract

The invention discloses a method for reducing the mercaptan content of a light oil product. The method comprises the steps: performing contact on mercaptan-containing light oil with electron-deficientalkene in the presence of oil-soluble organic base so as to obtain a reaction mixture with the mercaptan content lower than the light oil, wherein the electron-deficient alkene is electron-deficientolefin which can combine with the mercaptan to form thioether with a boiling point higher than a final boiling point of the light oil; and performing distillation on the reaction mixture so as to separate fractions with a boiling point not higher than the final boiling point of the light oil. According to the method, the content of mercaptan in the light oil can be reduced effectively, and the method has mild operating conditions, a simple process and low operation energy consumption.

Description

technical field [0001] The invention relates to the technical field of clean oil production, in particular, the invention relates to a method for reducing the mercaptan content of light oil. Background technique [0002] The presence of mercaptan compounds in light oil not only makes this kind of oil have a special odor, but also may cause corrosion of equipment during production, and may also lead to deterioration of oil quality during storage, and may also bring environmental pollution during use. pollution problem. Therefore, the deodorization process of light hydrocarbon oil (that is, the removal process of mercaptan compounds in light hydrocarbon oil) is also a key technology for producing clean oil. [0003] Among the many light oil sweetening processes, the catalytic oxidation process developed by UOP (namely, the Merox process) is the most widely used process. This process is based on the fact that a strong base can oxidize mercaptans with air as an oxidant in the p...

Claims

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Application Information

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IPC IPC(8): C10G29/24C10G29/20C10G7/00
Inventor 韩江华黄玉萍王树青王征
Owner CHINA PETROLEUM & CHEM CORP
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