Method for preparing hydrogen fluoride from flousper powder and sulfuric acid

A technology for sulfuric acid production and fluorite powder, which is applied in the direction of fluorine/hydrogen fluoride, calcium/strontium/barium sulfate, etc., can solve the problems of high refining cost of hydrogen fluoride products, no industrialized production line, and high production cost of hydrogen fluoride, and achieve novel process routes , Obvious energy saving and pollution reduction effect
CN101913565BActive Publication Date: 2013-01-23衢州市鼎盛化工科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
衢州市鼎盛化工科技有限公司
Publication Date
2013-01-23

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Abstract

The invention discloses a method for preparing hydrogen fluoride from flousper powder and sulfuric acid. The method comprises the following specific steps of: adding solution of sulfuric acid and the flousper powder into a reactor with a stirrer respectively, wherein the molar ratio of calcium fluoride to the sulfuric acid is 1:3-1:30, the granularity of the flousper powder is 280 to 1,220 meshes, and the reaction temperature is controlled to between 90 and 300 DEG C; generating hydrogen fluoride gas and calcium sulfate solid after the reaction; purifying, condensing and rectifying the hydrogen fluoride gas to obtain anhydrous hydrogen fluoride, or purifying and absorbing the hydrogen fluoride gas to obtain hydrofluoric acid; transferring the calcium sulfate solid and the sulfuric acid toa filtering system from the reactor to perform solid-liquid separation; returning the separated solution of sulfuric acid to the reactor; and washing and drying the calcium sulfate solid separated from the sulfuric acid to form a by-product. The method has the advantages of simple equipment, high reaction efficiency, low cost and easy industrialized production.
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Description

technical field

[0001] The invention relates to a method for producing hydrogen fluoride, more specifically a method for producing hydrogen fluoride with fluorite powder and sulfuric acid as raw materials. Background technique

[0002] Hydrogen fluoride is the basic raw material of fluorine chemical industry, molecular formula HF; hydrogen fluoride and its aqueous solution can be used to manufacture organic or inorganic fluorides, such as fluorocarbons, various fluorine refrigerants, fluororesins, aluminum fluoride, potassium fluoride, cryolite etc., can be used for glass etching, electroplating, ceramic treatment, petroleum industry catalyst, frosted bulb manufacturing, metal casting desanding, graphite ash removal, metal cleaning (brass, stainless steel) and semiconductor (germanium, silicon) manufacturing, etc.; The main raw material for the manufacture of elemental fluorine.

[0003] The traditional production method of hydrogen fluoride is to use fluorite powder and su...

Claims

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