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Hydrofluoric acid production apparatus and hydrofluoric acid production method

A generation device, hydrofluoric acid technology, applied in separation methods, chemical instruments and methods, fluorine, etc., can solve problems such as unusable, adsorbent deterioration, etc., to prevent concentration reduction, prevent distillate deterioration, and improve production efficiency Effect

Inactive Publication Date: 2008-10-01
日本顶点株式会社 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, since the silica in the adsorbent decomposes and disappears due to the reaction with concentrated sulfuric acid, the adsorbent deteriorates and cannot be used.

Method used

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Embodiment Construction

[0034] Embodiments of the present invention are described in detail according to the following drawings.

[0035] FIG. 1 shows a schematic diagram of a hydrofluoric acid generator of this embodiment. This hydrofluoric acid generating device is provided with a distillation tower 1 as a distillation mechanism. Inside the distillation tower 1, a heating furnace 2 and a raw material input passage 3 connected to the heating furnace 2 are provided, and a connection between the heating furnace 2 and the distillation tower 1 is provided. A spiral passage 4 for supplying water vapor on the upper side, and a spiral passage 5 for sending out hexafluorosilicic acid gas on the other upper side of the distillation column 1 that communicates the heating furnace 2 and the distillation column 1 .

[0036] In the raw material input channel 3, a raw material input port 8 is connected through the on-off valve 6 and the hopper 7, and further in the raw material input channel 3, a crystalline silic...

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Abstract

In the production of hydrofluoric acid by holding fluorine by adsorption from a drainage water or waste water containing fluorine with an inorganic ceramic adsorbent mainly composed of active alumina and silicon dioxide and producing hydrofluoric acid from the adsorbent provided after the adsorption, the object is to increase the efficiency of production of hydrofluoric acid and prevent the degradation of the adsorbent. A hydrofluoric acid production apparatus for producing hydrofluoric acid by holding a fluorine ion by adsorption from a fluorine compound or fluorine mixture which contains a fluorine ion with a ceramic adsorbent mainly composed of active alumina and silicon dioxide and producing hydrofluoric acid from the adsorbent provided after the adsorption, the apparatus comprising a distillation means for reacting the adsorbent with a strong alkali or strong acid and generating hexafluorosilicic acid gas by addition of crystalline silicon dioxide, and a cooling means for cooling and hydrolyzing the hexafluorosilicic acid gas produced in the distillation means to produce hydrofluoric acid.

Description

technical field [0001] The present invention relates to a kind of adsorption treatment of harmful substances containing fluoride from fluorine compound or fluorine mixture contained in drainage, waste liquid, waste gas, waste, etc. by using an adsorbent, and generating hydrogen fluorine by the adsorbent Acid (hydrofluoric acid) device and method. Background technique [0002] As a method for removing fluorine contained in drainage and waste liquid and recovering the fluorine, a method called crystallization is widely known. This method is based on the principle of recrystallization and precipitation, and fluorine ions in waste liquid are converted into calcium fluoride. (CaF 2 ) and remove it. However, this crystallization method produces high-purity calcium fluoride (CaF 2 ) has the following problems: it cannot be regenerated from drainage and waste liquid containing impurities other than fluorine, and it is limited to high-purity hydrofluoric acid waste liquid used in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/19B01D3/00C02F1/28
CPCB01D3/14B01D3/009B01D5/0006B01D5/0063C01B7/191C01B7/20C02F1/281C02F2101/14Y02P20/10B01D3/00C01B7/19C02F1/28
Inventor 仲喜治一
Owner 日本顶点株式会社
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