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High-selectivity compound desulfurizer and preparation method thereof

A high-selectivity, desulfurizing agent technology, applied in separation methods, chemical instruments and methods, and other chemical processes, can solve the problems of limited absorption capacity, poor control of regeneration conditions, and high content of corrosion products to achieve enhanced desulfurization Effect, high economic and environmental benefits, high selectivity effect

Active Publication Date: 2018-11-16
淄博凯美可工贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] With the aggravation of energy shortage and the increasing requirements of environmental protection, the requirements for selective desulfurization are also getting higher and higher. However, the current compound desulfurizers still have low solution concentration, easy foaming, and limited absorption capacity. The removal efficiency of other organic sulfur is low, and the content of degradation and corrosion products in the solution is still high, and the regeneration conditions are not strictly controlled, etc.
The existing desulfurizers can no longer meet the requirements, and it is imperative to develop a new type of desulfurizer that can meet stricter environmental regulations and has high selectivity and deep purification
[0005] In summary, although the existing MDEA and sterically hindered amine desulfurization solutions have their own characteristics, their desulfurization purification degree is low, the solvent loss is large, and the viscosity is high, which is not conducive to industrial application.

Method used

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  • High-selectivity compound desulfurizer and preparation method thereof
  • High-selectivity compound desulfurizer and preparation method thereof
  • High-selectivity compound desulfurizer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0032]Stir and mix 30 parts of N-methyldiethanolamine and 1 part of tetrabutylammonium chloride-polyethylene glycol to obtain compound desulfurizer A; then take 30 parts of N-methyldiethanolamine and 10 parts of piperazine Stir and mix evenly to obtain compound desulfurizer B; add compound desulfurizers A and B and 4 parts of 2,6-di-tert-butylphenol into the mixing kettle and stir for 15 minutes; then add polyethylene glycol under stirring 0.5 part of diol was stirred continuously for 15 minutes to prepare a compound desulfurizer.

Embodiment 2

[0034] Stir and mix 35 parts of N-methyldiethanolamine and 2.5 parts of tetrabutylammonium bromide-propionic acid to obtain compound desulfurizer A; then take 35 parts of N-methyldiethanolamine and 18 parts of 2-piperidine ethanol 6 parts of compound desulfurizers A and B and diethylhydroxylamine were added to the mixing kettle and stirred for 15 minutes; then 1.2 parts of tributyl phosphate were added under stirring Stirring was continued for 15 minutes to obtain a composite desulfurizer.

Embodiment 3

[0036] Add 70 parts of N-methyldiethanolamine, 2.5 parts of tetrabutylammonium bromide-caprolactam, 18 parts of tert-butylaminodiethanolamine, and 6 parts of p-hydroxybenzoic acid into the mixing tank, and stir for 20 minutes; then add phosphoric acid under stirring 1.2 parts of tributyl ester, continue to stir for 15 minutes to prepare a compound desulfurizer.

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PUM

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Abstract

The invention specifically relates to a high-selectivity compound desulfurizer and a preparation method thereof, belonging to the field of gas purification techniques. The high-selectivity compound desulfurizer comprises the following raw materials by weight: 60-80 parts of N-methyldiethanolamine, 1-3 parts of an eutectic solvent, 10-30 parts of sterically hindered amine, 0.5-1.5 parts of a non-silicon defoaming agent and 4-8 parts of an antioxidant. The compound desulfurizer provided by the invention overcomes the shortcomings of current refinery gas desulfurization processes, and is simple in process and applicable to desulfurization of most refinery acidic gases. According to the invention, N-methyldiethanolamine, the eutectic solvent and sterically hindered amine are compounded, and the supplementation effect and synergism of the above three components enhance the respective desulfurization effect of the components; and the high-selectivity compound desulfurizer has high purification depth, large absorption capacity, low energy consumption for regeneration, environment friendliness and other advantages.

Description

technical field [0001] The invention belongs to the technical field of gas purification, and in particular relates to a highly selective compound desulfurizer and a preparation method thereof. Background technique [0002] Hydrogen sulfide and SO are produced in refineries and other industries as processed crude oil deteriorates x The proportion of sulfur-containing compounds such as sulfur compounds continues to increase. The existence of sulfides can not only corrode equipment and pipelines, cause catalyst poisoning, but also pollute the environment and cause harm to the human body. It must meet national standards before transportation and processing; It is an essential raw material for chemical industry, and it is particularly important to recover efficiently and selectively. Therefore, sulfides in refinery gas need deep purification and removal, especially in high-content CO 2 case, for H 2 Highly selective removal of S is very important. [0003] N-methyldiethanolam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30B01D53/02
CPCB01D53/02B01D2253/20B01D2257/304B01D2258/02B01J20/22B01J20/30
Inventor 张由贵王立元张复修苏庆沂
Owner 淄博凯美可工贸有限公司
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