Water-based eutectic solvent, preparation method thereof and oil extraction and desulfurization method

A deep eutectic solvent and water-based technology, which is applied in the fields of refining hydrocarbon oil, petroleum industry, and treating hydrocarbon oil, can solve the problems of non-environmental protection, extraction agent pollution, and low desulfurization rate, and achieve good reproducibility, Good effect and simple desulfurization method

Active Publication Date: 2018-11-27
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current deep eutectic solvents mostly use organic solvents as hydrogen bond donors, which are not environmentally friendly, and the desulfurization rate is not high when applied to extraction desulfurization
In addition, when the extraction agent is regener

Method used

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  • Water-based eutectic solvent, preparation method thereof and oil extraction and desulfurization method
  • Water-based eutectic solvent, preparation method thereof and oil extraction and desulfurization method
  • Water-based eutectic solvent, preparation method thereof and oil extraction and desulfurization method

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Experimental program
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Effect test

Example Embodiment

[0047] The present invention provides a preparation method of the water-based eutectic solvent described in the above scheme, which includes the following steps:

[0048] The hydrogen bond acceptor and water are mixed at 20-80° C. to obtain a water-based eutectic solvent; the hydrogen bond acceptor is a quaternary ammonium salt and / or a quaternary phosphorus salt.

[0049] In the present invention, the mixing temperature is 20 to 80°C, preferably 30 to 60°C, more preferably 40°C; in the present invention, mixing is preferably performed under stirring conditions, and the stirring speed is preferably 100 to 1000 rpm, Preferably it is 300-600rpm; the stirring time is preferably 0.01-3h, more preferably 0.2-1h. In the present invention, the hydrogen bond donor and the hydrogen bond acceptor can be mixed directly under the condition of 20-80°C, and the preparation method is simple.

[0050] In the specific embodiment of the present invention, it is preferable that the hydrogen bond accep...

Example Embodiment

[0072] Example 1

[0073] Add 5g of tetrabutylphosphorus bromide and 0.53g of water into the flask, and stir at normal pressure to raise the temperature to 40°C, stir at 500rpm, and stir for 30min to obtain a clear and transparent water-based eutectic solvent.

[0074] Put 5g of synthetic water-based eutectic solvent and 5g of sulfur (dibenzothiophene) 500ppm model oil into the flask, stir for 30min at normal pressure and temperature of 25℃, stir at 800rpm, and stand for 30min. Layer, the oil phase is separated from the extraction phase by decantation, and the extraction phase is recycled through the subsequent regeneration operation to recover the eutectic solvent for reuse.

[0075] A sulfur-nitrogen analyzer was used to accurately detect the sulfur content of the upper oil phase, and the results showed that the sulfur content of the upper oil phase dropped to 148ppm, and the single-stage desulfurization rate was 70.4%.

Example Embodiment

[0076] Example 2

[0077] Add 5g of tetrabutylphosphorus bromide and 0.79g of water into the flask, and stir at normal pressure to raise the temperature to 40°C, stir at 500rpm, and stir for 30min to obtain a clear and transparent water-based eutectic solvent.

[0078] Put 5g of synthetic water-based eutectic solvent and 5g of sulfur (dibenzothiophene) 500ppm model oil into the flask, stir for 30min at normal pressure and temperature of 25℃, stir at 800rpm, and stand for 30min. Layer, the oil phase is separated from the extraction phase by decantation, and the extraction phase is recycled through the subsequent regeneration operation to recover the eutectic solvent for reuse.

[0079] A sulfur-nitrogen analyzer was used to accurately detect the sulfur content of the upper oil phase, and the results showed that the sulfur content of the upper oil phase dropped to 166 ppm, and the single-stage desulfurization rate was 66.8%.

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Abstract

The invention provides a water-based eutectic solvent, a preparation method thereof and an oil extraction and desulfurization method, and belongs to the technical field of desulfurization. A hydrogenbond acceptor of the water-based eutectic solvent provided by the invention is a quaternary ammonium salt and/or a quaternary phosphonium salt, a hydrogen bond donor is water, and an organic solvent is used as the hydrogen bond donor compared with a conventional eutectic solvent. The water-based eutectic solvent provided by the invention is greener and more environmentally-friendly, non-corrosive,high in desulfurization capability, and good in renewability; and when the water-based eutectic solvent provided by the invention is used as an extractant for oil desulfurization, a desulfurization process and an extractant regeneration process can be controlled by adjusting the content of the hydrogen bond donor water, without adding other substances such as a back-extractant, so that neither oil nor the extractant can be contaminated by the back-extractant in an entire desulfurization system, the environment also cannot be contaminated, and in the entire desulfurization process and extractant regeneration process, the conditions are mild, and the operation is simple and easy for being continuous, thereby being suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of desulfurization of oil products, in particular to a water-based deep eutectic solvent and a preparation method thereof, and a method for extracting desulfurization of oil products. Background technique [0002] The rapid development of industry has brought more and more serious pollution to the environment, especially the burning of sulfur compounds. The SOx produced by the combustion of sulfur-containing compounds in fuel oil can strongly stimulate the mucous membranes of the human body and the respiratory tract, and seriously cause bronchitis and even pulmonary edema and respiratory paralysis. In addition, SO emitted into the air 2 It will react with water vapor to form sulfuric acid rain, which seriously pollutes the environment. [0003] Under the circumstances that environmental problems need to be solved urgently, the country has set increasingly strict standards for the sulfur content in fuel oil...

Claims

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Application Information

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IPC IPC(8): C10G21/27C10G21/28
CPCC10G21/27C10G21/28C10G2300/202
Inventor 成洪业刘崇阳漆志文陈立芳
Owner EAST CHINA UNIV OF SCI & TECH
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