Analytical pure sulfuric acid production process

Abstract

Disclosed is an analytical pure sulfuric acid production process which comprises using high concentration sulfur trioxide gas as raw material gas, passing through condenser for condensation, distilling sulfur trioxide in the form of condensed fluid into gas, loading into absorption column for absorption, wherein the absorption solution employs analytical pure sulfuric acid, soft water is utilized for adjusting acid concentration, then the product is subject to desorption with air in a desorption tower, thus removing the sulfur dioxide dissolved in the product, the examined specification product is then loaded into finished products warehouse.

Description

technical field [0001] The invention belongs to a production method of analytically pure sulfuric acid, specifically a method for producing analytically pure sulfuric acid by using high-concentration sulfur trioxide gas as raw material gas through a synthesis method. Background technique [0002] At present, the method of domestic production of analytically pure sulfuric acid is to adopt distillation, that is, to produce analytically pure sulfuric acid as a raw material by means of distillation and purification with industrial sulfuric acid. This method adopts a quartz glass device, and the production process is intermittent production. The main shortcomings are: 1. The boiling point of distillate is 330°C, so the cost of the product remains high due to the high energy consumption of distillation. The power consumption per ton of finished products using ordinary glass equipment is as high as 1000-2000kWh. Although in recent years people have carried out a lot of improvement...

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Problems solved by technology

[0002] At present, the method of domestic production of analytically pure sulfuric acid is to adopt distillation, that is, to produce analytically pure sulfuric acid as a raw material by means of distillation and purification with industrial sulfuric acid. This method adopts a quartz glass device, and the production process is intermittent production. The main shortcomings are: 1. The boiling point is 330°C, resulting in high product cost due to high distillation energy consumption

2. The production capacity of a single device is small

The daily production capacity of each set of equipment is 0.05-0.1 tons of analytically pure sulfuric acid. At present, there is no large-scale single set of equipment used in China. The increase in production can only be achieved by connecting multiple sets in parallel, which increases the difficulty of operation and equipment management; After a period of use and cleaning, the equipment is seriously damaged, which also increases the production cost virtually.

3. Sulfur dioxide gas, sulfuric acid mist, etc. are directly discharged into the atmosphere during distillation, which not only pollutes the environment, but also causes harm to the operator's body and accelerates equipment corrosion

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