阅读说明：本技术 一种利用复合材料萃取噻吩的方法 (Method for extracting thiophene by using composite material ) 是由 柳月 薛姣姣 崔颖娜 周新 尹静梅 李慎敏 于 2019-12-06 设计创作，主要内容包括：本发明涉及一种利用复合材料萃取噻吩的方法,属于萃取分离技术领域。本发明所述方法包括如下步骤：通过浸渍法将深共融溶剂负载到碳纳米管上,得到复合材料；将复合材料、含噻吩的正辛烷溶液与氧化剂混合,搅拌,静置分层。本发明改善了因深共融溶剂是液体在工业上运输储存的不方便而采取固载化方法,且萃取方法简单、脱硫效率高、操作条件温和、环境友好,噻吩的脱硫率最高达97.40％。(The invention relates to a method for extracting thiophene by using a composite material, belonging to the technical field of extraction and separation. The method comprises the following steps: loading the deep eutectic solvent on the carbon nano tube by an impregnation method to obtain a composite material; mixing the composite material, the thiophene-containing n-octane solution and the oxidant, stirring, standing and layering. The invention improves the inconvenience of industrial transportation and storage of the deep eutectic solvent, adopts an immobilization method, has simple extraction method, high desulfurization efficiency, mild operation conditions and environmental protection, and has the highest thiophene desulfurization rate of 97.40 percent.)

1. A method for extracting thiophene by using a composite material is characterized by comprising the following steps: the method comprises the following steps:

loading the deep eutectic solvent on the carbon nano tube by an impregnation method to obtain a composite material;

mixing the composite material, the thiophene-containing n-octane solution and the oxidant, stirring, standing and layering.

2. The method for extracting thiophene by using composite materials according to claim 1, wherein: the deep eutectic solvent is a hydrogen bond acceptor and a hydrogen bond donor.

3. The method for extracting thiophene by using composite materials according to claim 2, wherein: the hydrogen bond acceptor is tetraethylammonium chloride or choline chloride.

4. The method for extracting thiophene by using composite materials according to claim 3, wherein: the hydrogen bond donor is p-toluenesulfonic acid, p-aminosalicylic acid or 5-sulfosalicylic acid.

5. The method for extracting thiophene by using composite materials according to claim 4, wherein: the molar ratio of the hydrogen bond acceptor to the hydrogen bond donor is 1: 1-2.

6. The method for extracting thiophene by using composite materials according to claim 5, wherein: the carbon nano tube is a carbon nano tube with OD <8nm or a carbon nano tube with OD being 30-60 nm.

7. The method for extracting thiophene by using composite materials according to claim 6, wherein: the mass ratio of the deep eutectic solvent to the carbon nano tube is 10-45: 1.

8. the method for extracting thiophene by using composite materials according to claim 7, wherein: the oxidant is tert-butyl alcohol hydroperoxide, periodic acid or hydrogen peroxide.

9. The method for extracting thiophene by using composite materials according to claim 8, wherein: the mass ratio of the composite material, the thiophene-containing n-octane solution and the oxidant is 1: 2-5: 0.2-0.5.

10. The method for extracting thiophene using composite materials according to claim 9, wherein: the stirring conditions are as follows: stirring at 800rpm for 60min at 25 ℃.

Technical Field

The invention relates to a method for extracting thiophene by using a composite material, belonging to the technical field of extraction and separation.

Background

In the last decades, air has been used from an environmental point of viewContamination has become an increasingly serious global problem. One of the main sources is the large amount of Sulfur Oxides (SO) produced during the combustion of fuels_x) And (5) discharging. The sulfur oxides bring great harm to CO and NO_xThe amount of discharge of (a) increases and acid rain is formed. In order to control the sulfur content of the atmosphere, many countries have enacted laws that limit the sulfur content of fuels. For example, China issued national V standards at 2016, 4, 1, in an attempt to reduce the sulfur content of petroleum to below 10 ppm.

Currently, conventional industrial desulfurization is a Hydrodesulfurization (HDS) technique that is effective for removing acyclic aliphatic sulfur compounds. However, the high temperature and pressure conditions required for the removal of refractory sulfur compounds make the HDS process very expensive. There is therefore a pressing need for an inexpensive and energy-efficient alternative to ultra-deep desulfurization. To date, a number of alternative desulfurization processes with mild conditions have been extensively studied. Several desulfurization techniques, such as oxidation, extraction, and adsorption, have been used to remove sulfur species from laboratory fuel oils. Among them, Oxidative Desulfurization (ODS) is considered as one of the most effective techniques for easily removing sparingly soluble sulfur compounds under mild conditions. Since the stability of the catalyst, the recycling of the catalyst, the ionic liquid, and the like need to be further improved, research on Extractive Catalytic Oxidation Desulfurization (ECODS) has been conducted.

Disclosure of Invention

In order to make up the defects of the prior art, the invention extracts thiophene by the two-component deep eutectic solvent/carbon nano tube composite material, thereby solving the problems.

The invention provides a method for extracting thiophene by using a composite material, which comprises the following steps: loading the deep eutectic solvent on the carbon nano tube by an impregnation method to obtain a composite material; mixing the composite material, the thiophene-containing n-octane solution and the oxidant, stirring, standing and layering.

The deep eutectic solvent is preferably a hydrogen bond acceptor and a hydrogen bond donor.

According to the invention, the hydrogen bond acceptor is preferably tetraethylammonium chloride or choline chloride.

Preferably, the hydrogen bond donor is p-toluenesulfonic acid, p-aminosalicylic acid or 5-sulfosalicylic acid.

The invention preferably has the molar ratio of the hydrogen bond acceptor to the hydrogen bond donor of 1: 1-2.

The carbon nanotube is preferably a carbon nanotube with OD <8nm or a carbon nanotube with OD of 30-60 nm.

The invention preferably selects the mass ratio of the deep eutectic solvent to the carbon nano tube as 10-45: 1.

preferably, the oxidizing agent is tert-butyl hydroperoxide, periodic acid or hydrogen peroxide.

The invention preferably selects the composite material, and the mass ratio of the thiophene-containing n-octane solution to the oxidant is 1: 2-5: 0.2-0.5.

The invention preferably has the following stirring conditions: stirring at 800rpm for 60min at 25 ℃.

The invention has the beneficial effects that:

the invention improves the inconvenience of industrial transportation and storage of the deep eutectic solvent, adopts an immobilization method, has simple extraction method, high desulfurization efficiency, mild operation conditions and environmental protection, and has the highest thiophene desulfurization rate of 97.40 percent.

Detailed Description

The following non-limiting examples are presented to enable those of ordinary skill in the art to more fully understand the present invention and are not intended to limit the invention in any way. Unless otherwise specified, the experimental methods adopted by the invention are all conventional methods, and experimental equipment, materials, reagents and the like used in the experimental method can be purchased from chemical companies.