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1,4-Trihydroxyethylbenzyldiammonium Sulfate, 1,3,5-Trihydroxyethylbenzyltriammonium Sulfate and Synthesis and Application

A technology of trihydroxyethyl diammonium and trihydroxyethyl diammonium, applied in 1,4-trihydroxyethyl diammonium sulfate, 1,3,5-trihydroxyethyl diammonium sulfate In the field of salt and synthesis and application, it can solve the problems of low resistance to environmental influence, difficult to digest gypsum saturation, and the decline in the quality of desulfurized gypsum, and achieve the effects of strong environmental adaptability, high adsorption saturation, and large-scale production

Active Publication Date: 2022-07-29
湖南西林环保材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the acid-base neutralization reaction method eliminates SO 2 hazards, but while SO 2 Other substances are also formed, SO 2 Its own value cannot be utilized, and the formed sulfates such as gypsum and Glauber’s salt not only cause the gypsum market to be saturated and oversaturated and difficult to digest, but also in a considerable number of cases, desulfurized gypsum cannot be effectively used due to the decline in quality, and improper disposal can easily cause secondary pollution
The cost of desulfurization of caustic soda and ammonia water is relatively high, the economy is not good, and ammonia is easy to escape into the air and cause secondary pollution
Physicochemical adsorption methods such as ionic liquid for SO removal 2 , although it can effectively eliminate SO 2 Pollution to the atmosphere, and at the same time can also recover SO 2 , but the ionic liquid in the current market is relatively expensive, resulting in high cost of use, and the ionic liquid also has certain requirements for the use environment. scope of use

Method used

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  • 1,4-Trihydroxyethylbenzyldiammonium Sulfate, 1,3,5-Trihydroxyethylbenzyltriammonium Sulfate and Synthesis and Application
  • 1,4-Trihydroxyethylbenzyldiammonium Sulfate, 1,3,5-Trihydroxyethylbenzyltriammonium Sulfate and Synthesis and Application
  • 1,4-Trihydroxyethylbenzyldiammonium Sulfate, 1,3,5-Trihydroxyethylbenzyltriammonium Sulfate and Synthesis and Application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] In this example, 1,4-p-dichlorobenzyl, acetonitrile, triethanolamine, sulfuric acid, etc. are used as main raw materials, and are prepared by chemical synthesis method under certain conditions. Specifically, it includes the following main steps:

[0055] (1) 1 part of 1,4-p-dichlorobenzyl was added to 2.5 parts of acetonitrile solution, fully stirred, and dispersed uniformly;

[0056] (2) add 2.2 parts of triethanolamine again, stir simultaneously and heat the temperature to 80 DEG C and reflux for 8h, the reaction equation is:

[0057]

[0058] (3) be cooled to room temperature naturally, and generate a large amount of 1,4-trihydroxyethylbenzyldiammonium chloride white precipitate, obtain filter cake after filtration, and filter cake is washed 3 times with acetonitrile solution;

[0059] (4) under 50 ℃ of vacuum conditions, the filter cake was dried for 8 hours to obtain 1,4-trihydroxyethylbenzyldiammonium chloride;

[0060] (5) under stirring condition, the vitri...

Embodiment 2

[0068] In this example, 1,3,5-tris(bromomethyl)benzene, acetonitrile, triethanolamine, sulfuric acid, etc. are used as main raw materials, and are prepared by chemical synthesis method under certain conditions. Specifically, it includes the following main steps:

[0069] (1) 1 part of 1,3,5-tris(bromomethyl)benzene was added to 2.6 parts of acetonitrile solution, fully stirred, and dispersed uniformly;

[0070] (2) add 3.3 parts of triethanolamine again, stir simultaneously and the temperature is heated to 80 DEG C and refluxed for 8h, the reaction equation is:

[0071]

[0072] (3) be cooled to room temperature naturally, and generate a large amount of 1,3,5-trihydroxyethylbenzyltriammonium bromide white precipitate, obtain filter cake after filtration, and filter cake is washed 3 times with acetonitrile solution;

[0073] (4) under 50 ℃ of vacuum conditions, the filter cake was dried for 8 hours to obtain 1,3,5-trihydroxyethylbenzyltriammonium bromide;

[0074] (5) unde...

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Abstract

The invention discloses 1,4-trihydroxyethylbenzyldiammonium sulfate, 1,3,5-trihydroxyethylbenzyltriammonium sulfate and applications of synthesizing and adsorbing sulfur dioxide. The synthesis of 1,4-trihydroxyethylbenzyldiammonium sulfate and 1,3,5-trihydroxyethylbenzyltriammonium sulfate is composed of 1,4-parabenzyl dihalide or 1,3,5-tri( Halogenated methyl)benzene and triethanolamine undergo substitution reaction, and then carry out anion exchange with sulfuric acid to obtain, the synthetic method has simple steps, mild conditions, and is conducive to large-scale production, and the synthesized two quaternary ammonium salts show good performance to sulfur dioxide. The adsorption capacity has the characteristics of high adsorption saturation, strong adsorption capacity, good performance stability, easy desorption, reusable, low application cost, etc. 2 Flue gas treatment and recovery of SO 2 wait for actual needs.

Description

technical field [0001] The invention relates to a sulfur dioxide adsorption material and a preparation method and application thereof, in particular to a 1,4-trihydroxyethylbenzyldiammonium sulfate, 1,3,5-trihydroxyethylbenzyltriammonium sulfate, and a It relates to a method for synthesizing 1,4-1,4- The method of trihydroxyethylbenzyldiammonium sulfate or 1,3,5-trihydroxyethylbenzylammonium sulfate, and also relates to utilizing 1,4-trihydroxyethylbenzyldiammonium sulfate or 1,3,5 -The application of trihydroxyethylbenzyl triammonium sulfate as a sulfur dioxide adsorption material belongs to the technical field of sulfur dioxide waste gas treatment. Background technique [0002] Sulfur dioxide (chemical formula SO 2 ) is a colorless gas with a strong pungent odor and is one of the main pollutants in the atmosphere. It is easy to combine with water vapor in the atmosphere to form sulfurous acid, which is one of the main substances of acid rain caused by air pollution. Su...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C215/14C07C213/08B01J20/22B01J20/30B01D53/02
CPCC07C215/14B01J20/22B01D53/02B01D2257/302
Inventor 王俊王定华傅湘龙陈志玮王平山
Owner 湖南西林环保材料有限公司
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