Fluorine-containing sulfuric acid separation concentration device and separation concentration method

A technology for concentration device and sulfuric acid, applied in sulfur trioxide/sulfuric acid and other directions, can solve the problems of difficult realization, complicated operation steps, strong corrosiveness, etc., and achieve the effect of simple method, good separation and concentration effect.
CN102424367AInactive Publication Date: 2012-04-25FINE SILICON
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FINE SILICON
Publication Date
2012-04-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a fluorine-containing sulfuric acid separation concentration method, which comprises the following steps of: providing a raw material liquid which contains sulfuric acid and hydrofluoric acid; and heating the raw material liquid at the pressure of minus 50Pa to minus 100Pa to the temperature of 110-130 DEG C to obtain concentrated sulfuric acid and mixed gases. The invention also provides a fluorine-containing sulfuric acid separation concentration device. According to the invention, when the raw material liquid containing sulfuric acid and hydrofluoric acid are heated at the pressure of minus 50Pa to minus 100Pa to the temperature of 110-130 DEG C, hydrofluoric acid and water in the raw material liquid are separated from sulfuric acid through the form of gaseous hydrogen fluoride and stream, and impurity separation and concentration of sulfuric acid can be simultaneously realized to obtain the mixed gases containing gaseous hydrogen fluoride and concentrated sulfuric acid. The separation concentration method provided by the invention can be used to separate hydrofluoric acid as an impurity from sulfuric acid and simultaneously condense dilute sulfuric acid into concentrated sulfuric acid. The method provided by the invention is simple and has a good separation concentration effect.
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Description

technical field

[0001] The invention belongs to the technical field of separation and concentration of fluorine-containing sulfuric acid, and in particular relates to a separation and concentration device and a separation and concentration method of fluorine-containing sulfuric acid. Background technique

[0002] Sulfuric acid, chemical formula H 2 SO 4 , is a colorless, odorless oily liquid, a strong acid with a high boiling point and low volatility, easily soluble in water, and miscible with water in any ratio. It is an important basic chemical raw material. In modern industrial production, many processes will produce dilute sulfuric acid with low concentration. Concentrating dilute sulfuric acid and recycling it can not only reduce production costs, but also reduce waste liquid discharge and reduce environmental pollution.

[0003] Since dilute sulfuric acid is a by-product of many production processes, it generally contains different impurities with different productio...

Claims

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