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An ionic liquid covalently modified polyacid intercalated hydrotalcite and its application in deep desulfurization of oil products

An ionic liquid, covalent modification technology, applied in the petroleum industry, refining hydrocarbon oil, processing hydrocarbon oil, etc., to achieve the effect of simple preparation method, improved thermal stability and recovery rate, and promotion of contact

Active Publication Date: 2019-03-29
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has been reported that ionic liquids can be covalently modified onto the surface of hydrotalcite laminates, but the assembly materials of multi-acid intercalated hydrotalcites covalently modified by ionic liquids have not been reported so far.

Method used

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  • An ionic liquid covalently modified polyacid intercalated hydrotalcite and its application in deep desulfurization of oil products
  • An ionic liquid covalently modified polyacid intercalated hydrotalcite and its application in deep desulfurization of oil products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] a. Take 0.03mol Mg(NO 3 ) 2 ·6H 2 O, 0.01mol Mg(NO 3 ) 2 ·6H 2 O mixed, dissolved in 80mL deionized water, and then 0.01mol hexamethylenetetramine was added to the above mixed salt solution, centrifuged at 3600rpm / min for 10min, the supernatant was transferred to an autoclave, and hydrothermally heated at 140°C Crystallize for 24h, then wash with suction to obtain a hydrotalcite precursor [Mg 3 Al(OH) 8 ]CO 3 .

[0022] b. Take 1g of [Mg 3 Al(OH) 8 ]CO 3 Disperse in 100mL methanol solution, pass through inert protective gas and stir for 3-5h, add 0.5mL of concentrated nitric acid into the dispersion system, stir for 3-5h, wash to neutral after the reaction, and obtain water with nitrate as the interlayer anion Talc precursor [Mg 3 Al(OH) 8 ]NO 3 .

[0023] c. Take 0.1g of [Mg 3 Al(OH) 8 ]NO 3 , stirred in 100mL formamide solvent for 24h under the condition of inert protective gas, centrifuged the hydrotalcite solution after peeling off, and discarded t...

Embodiment 1

[0026] The catalytic reaction is carried out in a simple glass reactor with magnetic stirring. Weigh 90mg of the multi-acid intercalated hydrotalcite covalently modified by the ionic liquid prepared in Example 1 as a catalyst, then add 5mL of simulated oil (wherein the sulfur concentration of the desulfurization substrate is 1000ppm) and 0.080mL of 30wt% hydrogen peroxide, in React at 70°C, take samples from the reaction system at intervals of 5 minutes, analyze by gas chromatography, and calculate the removal rate of sulfur-containing substrates.

[0027] The catalytic results are shown in Table 1. It can be seen from Table 1 that the multi-acid intercalated hydrotalcite covalently modified by the ionic liquid prepared in Example 1 can convert 99.9% of 4,6-dimethyldiphenyl The thiophene is oxidized to form 4,6-dimethyldibenzothiophene sulfone, so as to achieve a significant removal effect.

[0028] Table 1:

[0029]

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Abstract

The invention discloses an ionic liquid covalently modified polyacid intercalated hydrotalcite and application thereof in deep desulfurization of oil products. The preparation method of the ionic liquid covalently modified polyacid intercalated hydrotalcite includes: firstly preparing a hydrotalcite precursor and stripping the precursor with a formamide solution to form a colloidal solution; then conducting covalent modification to bond the ionic liquid to the peeled hydrotalcite nanosheet layer; then utilizing the electrostatic interaction of rare earth polyacid and the hydrotalcite nanosheet layer to conduct ordered assembly, thus forming rare earth polyacid anion directionally arranged and evenly dispersed ionic liquid covalently modified polyacid intercalated hydrotalcite. The invention utilizes the characteristics of rich hydroxyl and limited space of hydrotalcite to realize immobilization of ionic liquid and polyacid, and improves the thermal stability and recycling rate of polyacid. covalent modification of the ionic liquid to the hydrotalcite plate not only promote the contact of a desulfurization substrate and catalytic active components in the desulfurization process, but also can avoid additional adding of ionic liquid in each desulfurization process.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic composite materials, in particular to a multi-acid intercalation hydrotalcite covalently modified by ionic liquid and its application in deep desulfurization of oil products. Background technique [0002] Hydrotalcite intercalation materials (LDHs) are compounds formed by the interaction between positively charged host laminates and interlayer anions. The chemical composition of hydrotalcite intercalation materials (LDHs) has the following general formula: [M 1-x 2+ m x 3+ (OH) 2 ] x+ (A n- ) x / n mH 2 O, where M 2+ and M 3+ They are divalent and trivalent metal cations respectively, located on the main laminate; A n- is an interlayer anion; x is M 3+ / (M 2+ +M 3+ ) molar ratio; m is the number of interlayer water molecules. LDHs have the properties of tunable composition of metal ions in the main layer, adjustable charge density and distribution of the main layer, t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02C10G29/00
CPCB01J31/0295C10G29/00C10G2300/70
Inventor 宋宇飞许艳旗李腾飞王泽林张蒙蒙
Owner BEIJING UNIV OF CHEM TECH
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