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A device for producing electronic-grade phosphoric acid by tube crystallization

An electronic-grade phosphoric acid, tube-and-tube technology, applied in phosphorus compounds, inorganic chemistry, non-metallic elements, etc., can solve the problems of cumbersome production process, low product yield, large floor space, etc., and achieves simple, convenient and economical operation. Benefit, the effect of improving product quality

Inactive Publication Date: 2016-03-02
GUANGXI MINGLI CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The production process of the device is cumbersome, the equipment used is more, the floor area is large, and the product yield is low

Method used

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  • A device for producing electronic-grade phosphoric acid by tube crystallization

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Embodiment 1

[0023] A device for producing electronic-grade phosphoric acid by tube crystallization, comprising a crystallization tank 1, an acid outlet pump 5, an acid adjustment tank 7 and a circulation pump 6, which are sequentially connected by pipelines, and valves are arranged on the pipelines. The upper end of the crystallization tank 1 is provided with an acid inlet 11 and a seed crystal feeding port 12; the lower end of the crystallization tank 1 is provided with an acid outlet 13; The inlet is connected by a pipeline, and a valve is arranged on the pipeline.

[0024] The vertical tube crystallization device also includes a shower 2 , an infrared lamp 3 and four vertical tubes 4 . The shower 2 is arranged above the crystallization tank 1; the shower 2 includes an acid pump and two stainless steel pipes; the stainless steel pipes are provided with shower heads, which are evenly distributed in the crystallization tank 1 upper part. The infrared lamps 3 are evenly distributed in th...

Embodiment 2

[0027] A device for producing electronic-grade phosphoric acid by tube crystallization, comprising a crystallization tank 1, an acid outlet pump 5, an acid adjustment tank 7 and a circulation pump 6, which are sequentially connected by pipelines, and valves are arranged on the pipelines. The upper end of the crystallization tank 1 is provided with an acid inlet 11 and a seed crystal feeding port 12; the lower end of the crystallization tank 1 is provided with an acid outlet 13; The inlet is connected by a pipeline, and a valve is arranged on the pipeline.

[0028] The vertical tube crystallization device also includes a shower 2 , an infrared lamp 3 and eight vertical tubes 4 . The shower 2 is arranged above the crystallization tank 1; the shower 2 includes an acid pump and four stainless steel pipes; the stainless steel pipes are provided with shower heads, and the shower heads are evenly distributed in the middle of the crystallization tank 1. upper part. The infrared lamp...

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Abstract

The invention discloses a device for producing electronic-grade phosphoric acid by tube crystallization. The device comprises a crystallization tank, an acid outlet pump, an acid adjustment pump and a circulation pump which are connected through pipelines with valves in sequence, as well as a sprayer, infrared lamp tubes and more than four vertical tubes, wherein the sprayer is arranged above the crystallization tank; the infrared lamp tubes are uniformly distributed in the crystallization tank; the vertical tubes are vertically and uniformly distributed in the crystallization tank, are connected in parallel and are provided with cooling medium inlets and cooling medium outlets. According to the device, the vertical tubes are adopted as crystallization carriers, so that crystals are suspended on the vertical tubes, a liquid phase with high impurity content is thoroughly discharged when crystal and liquid phases are separated from each other, and the problems of low product quality and relatively low purification efficiency caused by incomplete crystal-liquid separation in a conventional straight tube crystallization process are solved. The device is simple and reasonable in structure and simple and convenient to operate, the process is simplified, the production cost is reduced, electronic-grade phosphoric acid can be subjected to industrialized production, and relatively good economic benefits are realized.

Description

technical field [0001] The invention belongs to the technical field of chemical equipment, and in particular relates to a device for producing electronic-grade phosphoric acid by tube crystallization. Background technique [0002] Electronic-grade phosphoric acid belongs to high-purity phosphoric acid, which is widely used in microelectronics industries such as large-scale integrated circuits and thin-film liquid crystal displays (TFT-LCD). It is mainly used for cleaning and etching chips. , Conductivity and reliability have a great influence. The ones with lower purity are mainly used for cleaning liquid crystal panel components, and the ones with higher purity are mainly used for cleaning and etching in the production process of electronic chips. Since insoluble solid particles or metal ions may be in the The current is conducted between the tiny circuits to make it short circuit, so electronic grade phosphoric acid has strict requirements on the content of insoluble solid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B25/234
Inventor 林军吴小海苏杰文王文营
Owner GUANGXI MINGLI CHEM
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