Separating agent for separating sulfur from sulfur-containing system and method for separating sulfur

A separation agent and system technology, applied in the field of sulfur separation, can solve the problems of small sulfur elemental particles, difficulty in sedimentation, sulfur waste, etc., and achieve the effects of easy sedimentation and separation, low volatility, and easy operation

Active Publication Date: 2015-11-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In short, the existing technology simply uses ionic liquid as a desulfurizing agent, and the sulfur particles produced are small

Method used

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  • Separating agent for separating sulfur from sulfur-containing system and method for separating sulfur
  • Separating agent for separating sulfur from sulfur-containing system and method for separating sulfur
  • Separating agent for separating sulfur from sulfur-containing system and method for separating sulfur

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] (1) Take 60mL of the iron-based ionic liquid prepared in (1), add 30mL of DMI, 0.6mLTX-100 into it, and mix well to obtain the separating agent;

[0100] (2) Raise the temperature of the separating agent prepared in step 1 to 80°C, and add 2 Sulfur-containing system after S;

[0101] (3) Cool the system obtained in step 2 to room temperature naturally. After 20 minutes, crystals are precipitated in the sulfur-containing system, and the precipitated crystals are separated and recovered.

[0102] The average particle diameter of the obtained sulfur particles measured by the eyepiece micrometer of the microscope is 3.1 mm.

Embodiment 2

[0104] (1) Take 50 mL of the iron-based ionic liquid prepared in (1), add 25 mL of DMI and 0.5 mL of TX-100 into it, and mix well to obtain the separating agent;

[0105] (2) Pass into the separating agent that contains 1%H in the separating agent prepared in step 1 2 The gas mixture of S is allowed to stand to separate the sulfur.

[0106] The eyepiece micrometer of the microscope measures the average particle diameter of the obtained sulfur particles to be 3.2 mm, and its particle size distribution is as follows: Figure 4 shown.

experiment example

[0118] (2) Determination method of sulfur solubility:

[0119] (1) Take excess sulfur and add it to 20mL solvent system, stir at room temperature until the solution is balanced, then filter it with a G4 sand core funnel to obtain undissolved sulfur, wash it with deionized water three times, put it in a drying oven and dry it to constant weight, and the sulfur The difference between the added amount and the undissolved amount is the solubility x of sulfur in the solvent system at room temperature 0 ;

[0120] (2) Take excess sulfur and add it to 30mL solvent system, stir and heat to t°C until the dissolution balance, let it stand for 1h to make the undissolved sulfur layered at the bottom of the solution, take 20mL upper saturated solvent system into a small beaker, cool to At room temperature, until all the sulfur is crystallized, washed with filtered water for three times, and dried to constant weight, the amount of sulfur precipitated can be obtained as x t , so that the s...

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Abstract

The invention discloses a method for separating sulfur from a sulfur-containing system. The method comprises that a composition containing a Fe-based ionic liquid, a solvent and a surfactant is employed, the composition promotes agglomeration of sulfur simple substance in a sulfur-containing system, and therefore small-particle sulfur generated in a sulfur-containing system rapidly grows into a sulfur particle with relatively large particle size at a relatively low temperature, and the sulfur product generated in the desulphurization technology is easy for sedimentation and recovery, and is prevented from depositing on a reactor wall or blocking a pipe. Also, investment reutilization is realized and economic benefit is increased.

Description

technical field [0001] The invention relates to the field of chemical separation, in particular to a method for separating sulfur from a sulfur-containing system. Background technique [0002] At present, there are two main processes for removing sulfur-containing compounds: dry desulfurization and wet desulfurization, among which wet desulfurization is the most widely used. [0003] In the prior art, in order to remove sulfur-containing compounds, there is a method of using non-aqueous ionic liquid as a desulfurizing agent, which can convert sulfur-containing compounds into simple sulfur, and then obtain sulfur as a by-product through separation. For example, Chinese patent CN102559292A discloses a method for desulfurization of hydrogen sulfide by medium and high temperature wet oxidation. After desulfurization, the product sulfur needs to be recovered by centrifugation or sedimentation. Among them, the centrifugal operation is complicated and requires professional equipmen...

Claims

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Application Information

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IPC IPC(8): C01B17/02C01B17/05
CPCY02P20/54
Inventor 余江杨溢郭智慧张婷婷
Owner BEIJING UNIV OF CHEM TECH
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