Production process for reagent grade high-purity sulfuric acid

Abstract

The invention discloses a production process for reagent grade high-purity sulfuric acid. In sulfuric acid production, a low temperature grade waste heat recovery system and a 20 percent fuming sulfuric acid production system are arranged, and the production process is characterized by adopting the following devices: a SO3 evaporator, a high-purity 98 percent sulfuric acid absorption tower, a high-purity 98 percent sulfuric acid circulating tank, a high-purity sulfuric acid cooler, a high-purity water purifier, an air purifier, and a high-purity finished 98 percent acid tank, wherein the input of the SO3 evaporator is connected with the 20 percent fuming sulfuric acid production system, and the output of the SO3 evaporator is connected with the high-purity 98 percent sulfuric acid absorption tower; the output of the high-purity 98 percent sulfuric acid absorption tower is connected with the high-purity 98 percent sulfuric acid circulating tank; the output of the high-purity 98 percentsulfuric acid circulating tank is connected with the high-purity sulfuric acid cooler through a main circulating acid pump; the acid output by the high-purity sulfuric acid cooler is input into the high-purity 98 percent sulfuric acid absorption tower to serve as circulating acid; finished acid enters the high-purity finished 98 percent acid tank; the output of the high-purity water purifier and the output of the air purifier are connected to the high-purity 98 percent sulfuric acid circulating tank; and the devices are connected with one another through pipelines.

Description

technical field

[0001] The invention relates to a production process of sulfuric acid, in particular discloses a production process of reagent-grade high-purity sulfuric acid, which is applied to the industrial production of high-grade (GR) and analytical-grade (AR) reagent-grade high-purity (98% acid concentration) sulfuric acid , the applicable sulfuric acid plant needs to be equipped with a low-temperature waste heat recovery system and a 20% oleum production system. Background technique

[0002] With the development of the electronics industry and fine chemical industry, the demand for superior grade and analytical grade sulfuric acid is increasing, especially the demand for GR and AR grade sulfuric acid is constantly expanding due to the expansion of production scale in the electronics industry and reagent and pharmaceutical industries. The existing sulfuric acid refining process mostly adopts flue gas purification method for small-scale production. Due to the complexit...

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