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Method and apparatus for producing hydrogen fluoride

A hydrogen fluoride and equipment technology, applied in the field of hydrogen fluoride preparation, can solve the problems of reduced heat transfer efficiency, reduced hydrogen fluoride production capacity, and reduced heat

Inactive Publication Date: 2003-10-22
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Therefore, as the operating time of the equipment increases, thicker deposits are formed on the inner surface, the heat supplied from the inner surface to the reaction mixture body decreases, the heat transfer efficiency decreases, and the overall production capacity of the hydrogen fluoride production equipment decreases.
As a result, in order to restore the production capacity of the production equipment of hydrogen fluoride, the stirring blades and / or the inner surface of the prereactor, and / or the scraping device and / or the inner surface of the rotary kiln, especially the stirring blades of the prereactor Repairs, replacements and other maintenance must be regularly and frequently shut down

Method used

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  • Method and apparatus for producing hydrogen fluoride
  • Method and apparatus for producing hydrogen fluoride
  • Method and apparatus for producing hydrogen fluoride

Examples

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preparation example Construction

[0063] The method for preparing hydrogen fluoride is preferably carried out continuously, however, it can also be carried out batchwise.

[0064] According to the present embodiment, it is possible to provide a reactor capable of maintaining a high production capacity for a longer period of time in the reaction of reacting fluorite and sulfuric acid to produce hydrogen fluoride and in the production equipment and production method of hydrogen fluoride using the reactor , can effectively reduce the wear of the top portion of the device (stirring blade, preferably scraping device) that provides shear force to the content between it and the inner surface of the reactor.

[0065] Moreover, the present invention is not limited to the above-described embodiments, and the reactor of the present invention can be widely used in a reaction system where corrosion is a problem, and a device that provides shear force such as a stirring blade or the like is applied to the content between it ...

Embodiment

[0068] In this example, an alloy containing (I) about 67% by weight of Co, about 28% by weight of Cr, about 4% by weight of W, and about 1% by weight of C was used as the wear-resistant and corrosion-resistant metal material (each weight ratio is based on the total weight) and (II) a metal material of about 60% by weight of tungsten carbide based on the total amount of the metal material.

[0069] As described in the embodiment, on the inner surface of the prereactor made of a material with the trade name MA-20Nb-3 (equivalent to Carpenter-20cb3, manufactured by Mitsubishi Materials Co., Ltd. of Japan), stripes are formed at intervals of 100 mm. Weld the strips with a thickness of about 3 mm and a width of about 30 mm made of the wear-resistant and corrosion-resistant materials, and the top part of the stirring blade arranged in the pre-reactor is also surfacing welded by the wear-resistant, corrosion-resistant materials. A strip made of corrosion-resistant metal, such that th...

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Abstract

A reactor for use in the production of hydrogen fluoride through the reaction of fluorite with sulfuric acid which has a means for applying a shear force between contents therein and the inner surface thereof, characterized in that, as the material of at least a part of the portion of said means being opposite to the inner surface of the reactor, use is made of a metal material which comprises a material containing at least one element selected from the group consisting of nickel, chromium, cobalt, iron, tungsten and carbon or an alloy containing two or more elements selected from the above group, and tungsten carbide, in a proportion wherein tungsten carbide accounts for 30 to 90 wt % of the metal material. The reactor is effectively reduced with respect to the abrasion of the tip portion of the means for applying a shear force.

Description

technical field [0001] The present invention relates to equipment and methods for preparing hydrogen fluoride. In more detail, the present invention relates to a reactor for producing hydrogen fluoride on an industrial scale by reacting a metal fluoride with sulfuric acid, oleum and water or a mixture thereof, the production equipment comprising said reactor, and the The preparation method of the above-mentioned equipment. Background technique [0002] Currently, as an industrial production method of hydrogen fluoride (HF), a method of reacting a metal fluoride with sulfuric acid, oleum, and water or a mixture thereof is used. Examples of the most well-known of these methods are as follows. First, with sulfuric acid (H 2 SO 4 ) and metal fluoride fluorite (as CaF 2 as the main component) as raw materials, respectively added to pre-reactors (or kneaders) such as external heating kneaders capable of solid-liquid mixing. By kneading while heating the raw materials in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F7/00B01F15/00B01J19/00B01J19/02B01J19/18B01J19/20C01B7/19C01B17/96C01F11/46
CPCB01J19/0066C01F11/46B22F2998/00C01B7/192B01F7/00208B01F7/00033C01B7/191B01J2219/0004C01B17/96B01J19/20B01J19/02B01J2219/00779B01J19/18B01F15/00837B01J2219/00247B01J2219/0236B01J19/006B01F7/00016B01F27/051B01F27/053B01F27/091B01F35/511C22C32/0052C22C29/08
Inventor 西村启伸穗本幸生江间规雄竹内俊顺
Owner DAIKIN IND LTD
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