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Crude oil organic chlorine transfer agent and dechlorination method

A technology of organochlorine and transfer agent, applied in organic chemistry, chemical instruments and methods, preparation of organic compounds, etc.

Inactive Publication Date: 2021-12-07
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The dechlorination mechanism of this method is that the positive ion of the chlorine transfer catalyst associates with the negative ion of the nucleophile in the water phase to form an ion pair, and the ion pair enters the oil phase through the oil-water interface, and undergoes nucleophilic substitution with the organic chloride in the oil phase. reaction, the organic chlorides are converted into inorganic chloride salts into the water phase, and then removed together with the water through the electric desalination process, but the difficulty of this method is the screening, design and synthesis of high-performance organochlorine transfer agents

Method used

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  • Crude oil organic chlorine transfer agent and dechlorination method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Preparation of organochlorine transfer agent: use absolute ethanol as the reaction solvent, the reactants are benzyltriethylammonium chloride and sodium hydroxide, add the solvent and the reactants to the three-necked flask in turn, install a thermometer, a stirring rod, and a condenser, Heating and heating, condensing and reflux, stirring and reacting, the reaction time is 2~5h, the reaction temperature is 60~90℃, the molar ratio of benzyltriethylammonium chloride and sodium hydroxide is 1:1~1:1.2, condense after the reaction to room temperature, and then use a sand core crucible to filter out sodium chloride to obtain benzyltriethylammonium hydroxide ethanol solution.

[0017] The chlorine content in the ethanol solution of benzyl ammonium hydroxide was detected to be 506 mg / L by microcoulometry.

[0018] Sodium hydroxide is selected as the nucleophile, and the molar ratio of crude oil organochlorine, organochlorine transfer agent, and nucleophile is 1:5:10.

[0019]...

Embodiment 2

[0021] Preparation of organochlorine transfer agent: using anhydrous methanol as the reaction solvent, the reactant is benzyltrimethylammonium chloride and potassium hydroxide, the solvent and the reactant are added to the three-necked flask in turn, and a thermometer, a stirring rod, and a condenser are installed. Heating and heating, condensing and reflux, stirring and reacting, the reaction time is 2 to 5 hours, the reaction temperature is 50 to 90°C, the molar ratio of benzyltrimethylammonium chloride to potassium hydroxide is 1:1 to 1:1.2, and condensed after the reaction to room temperature, and then filter potassium chloride with a sand core crucible to obtain benzyltrimethylammonium hydroxide methanol solution.

[0022] The chlorine content in the benzyltrimethylmethanol solution detected by microcoulometry was 470 mg / L.

[0023] Potassium hydroxide is selected as the nucleophile, and the molar ratio of crude oil organochlorine, organochlorine transfer agent, and nucle...

Embodiment 3

[0026] Preparation of organochlorine transfer agent: use absolute ethanol as the reaction solvent, the reactants are benzyltrimethylammonium chloride and sodium hydroxide, add the solvent and the reactants to the three-necked flask in turn, install a thermometer, a stirring rod, and a condenser, Heating and heating, condensing and reflux, stirring and reacting, the reaction time is 2 to 5 hours, the reaction temperature is 50 to 90°C, the molar ratio of benzyltrimethylammonium chloride and sodium hydroxide is 1:1 to 1:1.2, condense after the reaction to room temperature, and then use a sand core crucible to filter out sodium chloride to obtain benzyltrimethylammonium hydroxide ethanol solution.

[0027] The chlorine content in the ethanol solution of benzyltrimethylammonium hydroxide was detected to be 483mg / L by microcoulomb instrument.

[0028] Sodium ethoxide is selected as the nucleophile, and the molar ratio of crude oil organochlorine, organochlorine transfer agent, and ...

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Abstract

The invention discloses a preparation method of an organochlorine transfer agent benzyl compound, a chlorine transfer agent is prepared by reacting benzyl chloride and hydroxide under a certain condition, the content of chlorine in the prepared phase transfer agent is extremely low through detection, and the industrial application requirement is completely met. The invention also discloses a using method of the chlorine transfer agent. In the process of removing organochlorine from crude oil by using a nucleophilic reagent, the organochlorine transfer agent is added, so that the organochlorine can be in full contact with the nucleophilic reagent, the dechlorination efficiency is remarkably improved, the content of the organochlorine in the crude oil can be effectively reduced, and the harm caused by the organochlorine is greatly reduced.

Description

technical field [0001] The invention relates to an organic chlorine transfer agent and belongs to the field of organic chlorine removal from crude oil Background technique [0002] The chlorides in oil products come from the crude oil itself and the chemical chlorine-containing additives added during oil extraction, oil refining, transportation and processing, and the main forms are inorganic chlorides and organic chlorides. The presence of chlorine in oil will cause equipment corrosion, pipeline blockage and catalyst poisoning. Most of the inorganic chlorides can be removed by electric desalination, and organic chlorides can be removed by nucleophilic substitution, but this method has low dechlorination efficiency and poor removal effect without chlorine transfer agent. The presence of the organochlorine transfer agent can promote the heterogeneous reaction rate of oil and water, realize the interface ion transfer of two immiscible systems, and greatly improve the dechlori...

Claims

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Application Information

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IPC IPC(8): C10G29/20C10G29/22C07C209/00C07C211/63
CPCC10G29/20C10G29/22C07C209/00C10G2300/201C07C211/63
Inventor 熊伟李京于思荣刘恩洋李权王晓琼
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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