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Electronic-grade sulfuric acid heating device and method

A heating device, electronic-grade technology, applied in the field of electronic chemicals, can solve problems that have not been raised, and achieve the effects of convenient operation, shortened filtration time, and simple structure

Pending Publication Date: 2018-04-13
ZHEJIANG KAISN FLUOROCHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patented heating system is essentially for solving SO 3 heating vaporization problem because SO 3 It is solid at room temperature, and the problem of high viscosity and difficult filtration of electronic grade sulfuric acid is still not solved
[0004] On the other hand, although sulfuric acid has a high boiling point and viscosity, it is generally not easy to decompose, but when the sulfuric acid is heated to 290 ° C, it will begin to decompose and release sulfur trioxide. The local temperature of the sulfuric acid liquid is too high, and the prior art has not proposed a solution for this technical problem

Method used

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  • Electronic-grade sulfuric acid heating device and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] An electronic-grade sulfuric acid heating device, including an acid-resistant shell 2 and a heater 1 (heating tube material is PTFE), the heater 1 is fixed in the lower part of the acid-resistant shell 2, and the acid-resistant shell 2 is provided with a stirring device 3, acid-resistant The upper end of the housing 2 is provided with a liquid inlet 3 , and the bottom of the acid-resistant housing 2 is provided with a liquid outlet 5 . The stirring device 3 includes a stirring shaft and a stirring paddle arranged on the stirring shaft (the radius of the stirring paddle is 0.3 times the distance between the stirring shaft and the heater), and the acid-resistant shell 2 includes an outer shell (made of carbon steel) and an inner shell (made of PTFE ).

[0030] The process of using the device to heat electronic-grade sulfuric acid is: add electronic-grade sulfuric acid that has been absorbed and configured into the acid-resistant casing 2 through the liquid inlet 4, start ...

Embodiment 2

[0033] An electronic-grade sulfuric acid heating device, comprising an acid-resistant shell 2 and two heaters 1 (the heating tube material is PTFE), the heater 1 is fixed in the lower part of the acid-resistant shell 2, and the acid-resistant shell 2 is provided with a stirring device 3, The upper end of the acid-resistant housing 2 is provided with a liquid inlet 3 , and the bottom of the acid-resistant housing 2 is provided with a liquid outlet 5 . The stirring device 3 includes a stirring shaft and a stirring paddle arranged on the stirring shaft (the radius of the stirring paddle is 0.5 times the distance between the stirring shaft and the heater), and the acid-resistant shell 2 includes an outer shell (made of carbon steel) and an inner shell (made of PTFE ).

[0034] The process of using the device to heat electronic-grade sulfuric acid is: add electronic-grade sulfuric acid that has been absorbed and configured into the acid-resistant casing 2 through the liquid inlet 4...

Embodiment 3

[0037] An electronic-grade sulfuric acid heating device, comprising an acid-resistant shell 2 and three heaters 1 (heating tubes are made of PTFE), the heaters 1 are fixed in the lower part of the acid-resistant shell 2, and the acid-resistant shell 2 is provided with a stirring device 3, The upper end of the acid-resistant housing 2 is provided with a liquid inlet 3 , and the bottom of the acid-resistant housing 2 is provided with a liquid outlet 5 . The stirring device 3 includes a stirring shaft and a stirring paddle arranged on the stirring shaft (the radius of the stirring paddle is 0.7 times the distance between the stirring shaft and the heater), and the acid-resistant shell 2 includes an outer shell (made of carbon steel) and an inner shell (made of PTFE ).

[0038]The process of using the device to heat electronic-grade sulfuric acid is: add electronic-grade sulfuric acid that has been absorbed and configured into the acid-resistant casing 2 through the liquid inlet 4...

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PUM

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Abstract

The invention provides an electronic-grade sulfuric acid heating device which comprises an acid-resistant shell and at least one heater, wherein the heater is fixed at the lower part inside the acid-resistant shell; the acid-resistant shell is internally provided with a stirring device; a liquid inlet is formed in the upper end of the acid-resistant shell; a liquid outlet is formed in the bottom of the acid-resistant shell. The invention further discloses a method for heating electronic-grade sulfuric acid by using the device. The device is simple in structure, convenient to operate and high in heating efficiency, after heating treatment with the device, the filtering effect of the electronic-grade sulfuric acid is greatly improved, and the granule quality of the electronic-grade sulfuricacid is greatly improved.

Description

technical field [0001] The invention relates to the field of electronic chemicals, in particular to an electronic grade sulfuric acid heating device and method. Background technique [0002] At present, in the production process of electronic-grade sulfuric acid, the electronic-grade sulfuric acid solution that has been absorbed and prepared is cooled to room temperature and then enters the finished product tank, and then the particles are circulated and filtered from the finished product tank. Disclosed a kind of industrialized production method of high-purity sulfuric acid as CN102530885B, comprises the following steps: a, 40% nicotinic acid is evaporated out high-purity SO with nicotinic acid generator 3 Gas; b. Absorb SO with AR sulfuric acid absorption tower 3 ; c, cooling and shunting by the AR sulfuric acid pump tank, add desalted water or ultrapure water on the pipeline between the AR sulfuric acid absorption tower and the AR sulfuric acid pump tank, control the con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/90
CPCC01B17/90
Inventor 王海赵晓亚程文海曾朵清李平卢振成
Owner ZHEJIANG KAISN FLUOROCHEM