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Anhydrous hydrogen fluoride production method

A technology of anhydrous hydrogen fluoride and production method, applied in the direction of fluorine/hydrogen fluoride, etc., can solve the problems of low product conversion rate and high cost, and achieve the effects of improving product conversion rate and reducing cost

Active Publication Date: 2013-10-16
ANHUI JINYANG FLUORINE CHEM
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Problems solved by technology

[0003] However, in the prior art, no matter dry method or wet method to produce anhydrous hydrogen fluoride, there are problems of high cost and low product conversion rate, which need to be improved urgently

Method used

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  • Anhydrous hydrogen fluoride production method

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Embodiment Construction

[0021] The technical scheme of the present invention will be further described below in conjunction with the accompanying drawings and through specific embodiments:

[0022] Embodiments of the present invention provide a method for producing anhydrous hydrogen fluoride, such as figure 1 shown, including the following steps:

[0023] Step 101, sending fluorite powder into the pre-reactor. Specifically: the fluorite powder is transported to the high-level fluorite silo by compressed air from the single-chamber pump, and then sent to the pre-reactor continuously through the fluorite silo, unloading screw, feeding hopper, and fluorite feed scale. Among them, fluorite is also called fluorspar, and its chemical composition is mainly calcium fluoride.

[0024] Step 102, sending sulfuric acid into the pre-reactor. Ordinary sulfuric acid and oleum from the tank area enter the sulfuric acid storage tank and oleum storage tank respectively through the outer pipe, and through the sulfu...

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Abstract

The invention discloses an anhydrous hydrogen fluoride production method which comprises the following steps: conveying fluorite powder and sulfuric acid to a pre-reactor, fully mixing the fluorite powder and the sulfuric acid and enabling the fluorite powder and sulfuric acid to react to generate coarse hydrogen fluoride gas; removing impurities from the coarse hydrogen fluoride gas through a pre-purifying tower and a washing tower, cooling the coarse hydrogen fluoride gas, and conveying the coarse hydrogen fluoride gas to a rectifying tower for refining; enabling the anhydrous hydrofluoric acid to get out of the rectifying tower with the help of the pressure of the tower, and leading the anhydrous hydrofluoric acid to an anhydrous hydrofluoric acid finished product storage tank through a finished product cooler. According to the invention, the hydrogen fluoride discharged from the gas can be recycled, the conversion rate of the product is increased, the cost is lowered, and useful by-products such as gypsum and fluosilicic acid are produced.

Description

technical field [0001] The invention relates to a method for producing anhydrous hydrogen fluoride. Background technique [0002] Anhydrous hydrogen fluoride has been widely used in atomic energy, chemical industry, petroleum and other industries. It is a strong oxidizing agent and the basic raw material for preparing elemental fluorine, various fluorine refrigerants, inorganic fluorides, and various organic fluorides. It can be formulated into various It is used in water hydrofluoric acid, used in the manufacture of graphite and as a catalyst for the manufacture of organic compounds. Anhydrous hydrogen fluoride is the raw material for producing refrigerant "Freon", fluorine-containing resin, organic fluoride and fluorine. Anhydrous hydrogen fluoride can be used as a catalyst for organic synthesis such as alkylation, polymerization, condensation and isomerization in chemical production. In the atomic energy industry and nuclear weapon production, it is the raw material for...

Claims

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Application Information

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IPC IPC(8): C01B7/19
Inventor 陈喜
Owner ANHUI JINYANG FLUORINE CHEM
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