1, 4-triethoxylbenzyldiammonium sulfate, 1, 3, 5-triethoxylbenzyltriammonium sulfate, synthesis method and application of 1, 4-triethoxylbenzyl diammonium sulfate, and synthesis method and application of 1, 3, 5-triethoxylbenzyl triammonium sulfate

Abstract

The invention discloses a 1, 4-trihydroxyethylbenzyldiammonium sulfate, a 1, 3, 5-trihydroxyethylbenzyltriammonium sulfate, a synthesis method and sulfur dioxide adsorption application of the 1, 4-trihydroxyethylbenzyldiammonium sulfate, and a synthesis method and sulfur dioxide adsorption application of the 1, 3, 5-trihydroxyethylbenzyltriammonium sulfate. 1, 4-trihydroxyethylbenzyldiammonium sulfate and 1, 3, 5-trihydroxyethylbenzyltriammonium sulfate are synthesized through the steps that 1, 4-p-dibenzyl halide or 1, 3, 5-tri(halogenated methyl)benzene and triethanolamine are subjected to a substitution reaction and then subjected to anion exchange with sulfuric acid, and the synthesis methods are simple in step, mild in condition and beneficial to large-scale production; and the two synthesized quaternary ammonium salts show good adsorption capacity to sulfur dioxide, have the characteristics of high adsorption saturation, strong adsorption capacity, good performance stability, easy desorption, reusability, low application cost and the like, and meet the actual requirements of SO2-containing flue gas treatment, SO2 recovery and the like in the market.

Description

technical field [0001] The invention relates to a sulfur dioxide adsorption material and its preparation method and application, in particular to a 1,4-trihydroxyethylbenium diammonium sulfate, 1,3,5-trihydroxyethylbenium triammonium sulfate, and It involves a synthesis of 1,4-p-dihalobenzyl or 1,3,5-tris(halomethyl)benzene, triethanolamine, sulfuric acid, etc. as main raw materials through substitution reaction, ion exchange and other steps. The method of trihydroxyethyldiammonium sulfate or 1,3,5-trihydroxyethyldiammonium sulfate also involves the use of 1,4-trihydroxyethyldiammonium sulfate or 1,3,5 -The application of trihydroxyethyl 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...

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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

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