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Method for making high-purity refined sulfuric acid

A manufacturing method and high-purity technology, applied in chemical instruments and methods, sulfur compounds, inorganic chemistry, etc., can solve the problems of insignificant cost advantages and high energy consumption, and achieve the protection of downstream equipment, low production energy consumption, and low production costs. Effect

Pending Publication Date: 2019-02-15
惠州市百利宏晟安化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The other is to prepare fuming sulfuric acid by absorbing it first, and then heat the fuming acid to separate out pure SO 3 , for the reagent acid absorption tower to absorb (hereinafter referred to as the niacin evaporation absorption method), and add desalted water to the system to balance the acid concentration; the purity of the reagent sulfuric acid produced by the niacin evaporation absorption method can reach GB / T625-2007 analysis Pure specification, but fuming acid distills SO 3 The process energy consumption is still high, and the cost advantage is not obvious

Method used

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  • Method for making high-purity refined sulfuric acid

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Effect test

Embodiment 1

[0031] See figure 1 . A kind of manufacture method of high-purity refined sulfuric acid of present embodiment, it may further comprise the steps:

[0032] Step 1, equipment transformation: build a fuming sulfuric acid purification tower and a reagent sulfuric acid absorption tower, and set a bypass at the inlet of the first suction tower of the industrial sulfuric acid production main device to connect with the fuming sulfuric acid purification tower, and absorb the reagent sulfuric acid The tail gas of the tower is connected back to the outlet of the first suction tower of the main unit of industrial sulfuric acid production;

[0033] Step 2, nicotin acid cycle pickling purification process: the SO4 sent by the industrial sulfuric acid production main device is transformed 3 Furnace gas, and enter from the bottom of the fuming sulfuric acid purification tower, and then SO 3 The furnace gas and the fuming circulating acid entering the upper part of the fuming sulfuric acid ...

Embodiment 2

[0037] See figure 1 . A kind of manufacture method of high-purity refined sulfuric acid of present embodiment, it may further comprise the steps:

[0038] Step 1, equipment transformation: build a fuming sulfuric acid purification tower and a reagent sulfuric acid absorption tower, and set a bypass at the inlet of the first suction tower of the industrial sulfuric acid production main device to connect with the fuming sulfuric acid purification tower, and absorb the reagent sulfuric acid The tail gas of the tower is connected back to the outlet of the first suction tower of the main unit of industrial sulfuric acid production;

[0039] Step 2, nicotin acid cycle pickling purification process: the SO4 sent by the industrial sulfuric acid production main device is transformed 3 Furnace gas, and enter from the bottom of the fuming sulfuric acid purification tower, and then SO 3 The furnace gas and the fuming circulating acid entering the upper part of the fuming sulfuric acid ...

Embodiment 3

[0043] See figure 1 . A kind of manufacture method of high-purity refined sulfuric acid of present embodiment, it may further comprise the steps:

[0044] Step 1, equipment transformation: build a fuming sulfuric acid purification tower and a reagent sulfuric acid absorption tower, and set a bypass at the inlet of the first suction tower of the industrial sulfuric acid production main device to connect with the fuming sulfuric acid purification tower, and absorb the reagent sulfuric acid The tail gas of the tower is connected back to the outlet of the first suction tower of the main unit of industrial sulfuric acid production;

[0045] Step 2, nicotin acid cycle pickling purification process: the SO4 sent by the industrial sulfuric acid production main device is transformed 3 Furnace gas, and enter from the bottom of the fuming sulfuric acid purification tower, and then SO 3 The furnace gas and the fuming circulating acid entering the upper part of the fuming sulfuric acid ...

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Abstract

The invention relates to the technical field of inorganic chemical manufacturing and in particular relates to a method for making high-purity refined sulfuric acid. The method comprises the followingsteps: 1, equipment transformation; 2, cycle pickling purification of fuming acid; 3, circulating absorption of a sulfuric acid reagent; and 4, degassing of the sulfuric acid reagent. Since the quality of the reagent acid is reduced by dust and other particles contained in flue gas, the flue gas is subjected to washing purification with fuming sulfuric acid, the purified flue gas enters a sulfuricacid reagent absorption tower to be absorbed again, the product can further achieve high purity, and the method has the advantage of low production cost. Since a fuming sulfuric acid purification tower is arranged and the high-concentration fuming circulating acid is adopted for circulating absorption, the absorption rate of the fuming sulfuric acid purification tower can be further reduced, theconcentration of furnace gas SO3 entering the sulfuric acid reagent absorption tower is ensured, production of the sulfuric acid reagent is stabilized, and consumption of steam and other heat energy is avoided. Therefore, the method disclosed by the invention has the advantages of low production energy consumption and low production cost.

Description

technical field [0001] The invention relates to the technical field of inorganic chemical manufacturing, in particular to a method for manufacturing high-purity refined sulfuric acid. Background technique [0002] At present, the quality standard of domestic reagent sulfuric acid is in accordance with GB / T625-2007 "Chemical Reagent Sulfuric Acid", and its production methods mainly include distillation method and absorption method. Among them, pickling purification-absorption method reagent sulfuric acid production distillation generally adopts w(H 2 SO 4 ) 98% industrial sulfuric acid is used as raw material, and after pretreatment, it is purified by heating and distillation in a quartz glass device, which is a post-treatment physical purification process of industrial sulfuric acid. The heat source used in the distillation method is mainly electric energy, and coal and gas are also used. The biggest disadvantage of the distillation method is the high energy consumption. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/74
CPCC01B17/74
Inventor 何文旭
Owner 惠州市百利宏晟安化工有限公司
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