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Process for removing conjugated diene

A technology of conjugated diene and maleic anhydride, which is applied in the direction of only multi-stage series refining process, etc., can solve the problems of high amount of conjugated diene and high catalyst preparation cost

Inactive Publication Date: 2004-10-06
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Although the above-mentioned solid catalyst can be used for catalytic selective hydrogenation to achieve the purpose of removing conjugated dienes in the raw oil, most of the catalysts used use noble metals as active components, so the preparation cost of the catalyst is high
In addition, the amount of residual conjugated diene in the raw oil after removal of conjugated diene is still relatively large

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1-4

[0020] Take 50 milliliters of gasoline and add 0.665 grams of solid maleic anhydride and 0.043 grams of iodine with a grinding mouth conical flask, reflux in 85 ℃ water bath for 1 hour, then add 15 milliliters of water and continue to reflux for 0.5 hours. After cooling, separate the gasoline with a separatory funnel. Example 1 is washed with water to neutrality. Example 2-4 is washed once with 25%, 0.5%, and 0.01% ammonia respectively, and then washed with water to neutrality. The results of the deconjugated diene reaction are listed in Table 1.

[0021] 2-Methyl-1,3-

example 5

[0023] Take 50 milliliters of gasoline and add 25 milliliters of 6% maleic anhydride toluene solution and 5 milliliters of 0.1N iodine toluene solution with a grinding mouth conical flask, reflux in 85 ℃ water bath for 1 hour, then add 25 milliliters of water and continue to reflux for 0.5 hours. After cooling, separate the gasoline with a separating funnel, wash once with 0.5% ammonia water, and then wash with water until neutral. The results of the deconjugated diene reaction are listed in Table 2.

[0024] 2-Methyl-1,3-

example 6

[0026] Take 50 milliliters of gasoline and add 0.665 grams of solid maleic anhydride and 0.043 grams of iodine with a grinding mouth conical flask, reflux in 85 ℃ water bath for 1 hour, then add 15 milliliters of water and continue to reflux for 0.5 hours. After cooling, separate the gasoline with a separating funnel, wash once with 0.1% sodium hydroxide solution, and then wash with water until neutral. The results of the deconjugated diene reaction are listed in Table 3.

[0027] 2-Methyl-1,3-

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PUM

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Abstract

A process for removing the conjugated diene from raw oil includes reaction of said raw oil containing conjugated diene with maleic acid anhydride, hydrolysis, washing with alkali solution until it shows alkaline, and washing with water until it shows neutral. Its advantages are high effect and not containing acid anhydride in oil.

Description

technical field [0001] The invention provides a method for removing conjugated diene, in particular, provides a method for removing conjugated diene in raw oil (gasoline). Background technique [0002] Conjugated dienes are environmental pollutants that affect air and water quality and can easily cause human illness. Conjugated dienes also affect the stability of gasoline, and conjugated dienes affect the activity, selectivity and stability of many catalysts, and are poisonous to many catalysts, which should be removed before the reaction. Effective removal of conjugated diene is of great significance to the improvement of oil refining industry, catalytic industry, environmental protection industry and people's living standards, and its application prospect is very broad. [0003] At present, the method of removing conjugated dienes mainly uses the method of selective hydrogenation. [0004] CN85100761 uses Pd or Pt loaded on fibers as a catalyst to carry out selective hyd...

Claims

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Application Information

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IPC IPC(8): C10G53/10C10G53/12
Inventor 吴治华王清遐徐龙伢谢素娟张莲英
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI