Method and equipment for preparing super clean, high purified hydrofluoric acid

A technology of hydrofluoric acid and high purity, applied in chemical instruments and methods, halogen oxides/oxyacids, inorganic chemistry, etc., can solve problems such as difficulty in preparing ultra-clean and high-purity hydrofluoric acid, low production cost, and inability to achieve Stable and reliable product quality, low production cost and long service life

Inactive Publication Date: 2007-07-25
战玉柏 +1
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Problems solved by technology

[0004] Provide a method and device for preparing ultra-clean and high-purity hydrofluoric acid, which can overcome the deficiencies in the prior art and solve the problem that it is impossible or difficult to prepare ultra-clean and high-purity hydrofluoric acid at present, and can be produced co

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  • Method and equipment for preparing super clean, high purified hydrofluoric acid
  • Method and equipment for preparing super clean, high purified hydrofluoric acid

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Embodiment Construction

[0029] Further explain in detail in conjunction with accompanying drawings;

[0030] As shown in Figure 1

[0031] First, in the hydrogen fluoride distillation and absorption system:

[0032] When the liquid hydrogen fluoride raw material storage bottle 2 is at a high position, the material can be discharged outward by the level difference, but it is best to connect clean compressed air or ultra-pure pressure nitrogen into the storage bottle 2, 1kg / cm2 2 The raw materials can be pressed out from left and right to maintain stable and continuous feeding into the still 5; the storage bottle 2 is placed on the electronic scale 1, based on the soft connection type outward feeding, the batch consumption of intermittent liquid hydrogen fluoride raw materials can be Accurately measured by electronic scale 1 in continuous feeding;

[0033] The ultrapure water used in the process is self-made, and it is standard direct water that meets the requirements for preparing ultra-clean and hi...

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Abstract

This invention relates to method and apparatus for preparing high-purity HF. This invention mainly solves the difficulties in continuous and large-scale preparation of high-purity HF. The method comprises: continuously distilling liquid HF in a distillation column equipped with a distillation kettle and an overhead 1# water condenser, introducing purified HF gas from the bottom into a spray absorption column for reverse-flow water absorprtion, storing the spray absorption liquid of a certain concentration as the intermediate in a high-level storage tank, and rectifying the intermediate in a rectification column with a bottom kettle and an overhead 2# water condenser, controlling the temperatures of the bottom kettle and the overhead to obtain high-purity HF, and storing in a product tank. The method has such advantages as low cost, stable and reliable product quality, easy operation, high efficiencty, high yield, and good safety and environmental protection.

Description

technical field [0001] The invention belongs to the field of chemical production, and relates to a method and a device for preparing ultra-clean and high-purity hydrofluoric acid. Background technique [0002] In the prior art, ordinary hydrofluoric acid is produced by the bubbling absorption method, that is, the industrial hydrogen fluoride gas is bubbled into water to be absorbed and then produced, and then high-grade hydrofluoric acid is produced by rectification and sub-boiling distillation processes. Pure hydrofluoric acid, due to the strong corrosiveness of hydrofluoric acid, especially when the temperature of the tower is high, the corrosion will be more serious, so the distillation equipment used generally needs to be made of precious metals such as platinum, gold, silver, etc., so the production cost is very high. High; the above-mentioned method for producing high-purity hydrofluoric acid and its device mainly have the following deficiencies: the one, hydrogen fluo...

Claims

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Application Information

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IPC IPC(8): C01B11/00
Inventor 战玉柏冯留启
Owner 战玉柏
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