Method for preparing sulfuric acid and hydrogen bromide from sulfur dioxide waste gas

A technology of sulfur dioxide and hydrogen bromide, applied in chemical instruments and methods, bromine/hydrogen bromide, inorganic chemistry, etc., can solve problems such as environmental pollution, and achieve the effects of being suitable for popularization and application, simple operation, and low equipment investment cost

Inactive Publication Date: 2011-02-09
汪晋强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method turns waste into treasure, effectively converts sulfur dioxide waste gas into zinc sulfite with great economic significance, fully taps and utilizes potential economic value, and at the same time, also solves the comprehensive utilization and treatment of waste residue obtained from lithopone production The resulting environmental pollution problem provides an environmental guarantee for the comprehensive utilization and treatment of waste residue obtained from lithopone

Method used

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  • Method for preparing sulfuric acid and hydrogen bromide from sulfur dioxide waste gas
  • Method for preparing sulfuric acid and hydrogen bromide from sulfur dioxide waste gas

Examples

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Embodiment 1

[0023] refer to figure 1 , a method for preparing sulfuric acid and hydrogen bromide from sulfur dioxide waste gas, the sulfur dioxide gas containing 64kg of sulfur dioxide is passed into the enamel reactor (2) containing bromine aqueous solution according to the mass ratio of bromine and sulfur dioxide as 1:0.4 , slowly start the stirrer to make it carry out chemical reaction, obtain the reaction liquid containing sulfuric acid and hydrogen bromide; With the suction filtration of the reaction liquid containing sulfuric acid and hydrogen bromide through suction filter (3), obtain clear solution and a small amount of Filter cake impurities; filter cake impurities are incinerated; the resulting clear solution is sent to the evaporator (4) for evaporation, hydrogen bromide is first distilled out, and then cooled by a serpentine cooling tube (5) to obtain hydrogen bromide (6) product , wherein the pure substance quality of hydrogen bromide is 162kg; When the residual liquid contin...

Embodiment 2

[0026] refer to figure 1 , a kind of method that prepares sulfuric acid and hydrogen bromide with sulfur dioxide exhaust gas, the sulfur dioxide gas that will contain 96kg sulfur dioxide = is 1: 0.2-0.6 according to the pure matter mass ratio of bromine and sulfur dioxide, pass into the enamel reactor that fills the aqueous solution of bromine ( 2) In, slowly start the agitator to make it carry out chemical reaction, obtain the reaction liquid containing sulfuric acid and hydrogen bromide; Suction filter the reaction liquid containing sulfuric acid and hydrogen bromide through suction filter (3), obtain clear solution and a small amount of filter cake impurities; filter cake impurities are incinerated; the clarified solution of the gained is sent into the evaporator (4) to evaporate, and the hydrogen bromide is first distilled out, and then cooled through the serpentine cooling pipe (5) to obtain hydrogen bromide ( 6) product, wherein the pure substance quality of hydrogen bro...

Embodiment 3

[0029] refer to figure 1, a method for preparing sulfuric acid and hydrogen bromide from sulfur dioxide waste gas, the sulfur dioxide gas containing 32kg sulfur dioxide is passed into the enamel reactor (2) containing bromine aqueous solution according to the mass ratio of bromine and sulfur dioxide as 1:0.2 , slowly start the stirrer to make it carry out chemical reaction, obtain the reaction liquid containing sulfuric acid and hydrogen bromide; With the suction filtration of the reaction liquid containing sulfuric acid and hydrogen bromide through suction filter (3), obtain clear solution and a small amount of Filter cake impurities; filter cake impurities are incinerated; the resulting clear solution is sent to the evaporator (4) for evaporation, hydrogen bromide is first distilled out, and then cooled by a serpentine cooling tube (5) to obtain hydrogen bromide (6) product , wherein the pure substance mass content of hydrogen bromide is 81kg; When the residual liquid contin...

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Abstract

The invention provides a method for preparing sulfuric acid and hydrogen bromide from sulfur dioxide waste gas. The method comprises the following steps of: performing chemical reaction of sulfuric dioxide and bromine water to obtain sulfuric acid and hydrogen bromide-containing reaction solution; suction filtering to obtain clear solution and a little amount of filter cake impurity; burning the filter cake impurity; evaporating the clear solution to first distill the hydrogen bromide and cooling the solution to obtain a hydrogen bromide product; and continuously evaporating and concentrating the remaining solution to obtain saturated solution of sulfuric acid and cooling the solution to obtain the high-concentration sulfuric acid product. By the method, waste material is changed into things of value, the sulfuric dioxide waste gas is effectively converted into zinc sulfite with great economic significance and the potential economic value is fully explored and utilized; meanwhile the method solves the problem of environmental pollution caused by comprehensive utilization and treatment of waste slag obtained from the production of lithopone and provides environmental guarantee for the comprehensive utilization and treatment of the waste slag obtained from the production of the lithopone.

Description

technical field [0001] The invention relates to the technical field of comprehensive treatment and utilization of waste residue obtained from producing lithopone, in particular to a method for preparing sulfuric acid and hydrogen bromide from sulfur dioxide waste gas. Background technique [0002] Lithopone, commonly known as lithopone, is a mixture of zinc sulfide and barium sulfate, usually prepared by roasting and leaching. That is to say, the natural barite containing more than 95% of barium sulfate and anthracite are mixed and fed at a ratio of 3:1 (mass), and then crushed to a diameter of about 2 cm or less and enter the reduction furnace. 600°C, the reduction furnace rotates at a speed of 80s per revolution, and the reaction conversion rate is 80% to 90%. The obtained barium sulfide enters the leaching device, and the temperature is controlled above 65°C to obtain a barium sulfide content of 701%, and then enters the clarification After clarification, zinc sulfate is...

Claims

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Application Information

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IPC IPC(8): C01B7/09C01B17/74
Inventor 王嘉兴
Owner 汪晋强
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