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Purifying method for crude dioxane

A purification method, the technology of dioxane, applied in the direction of organic chemistry, etc., can solve the problems of low recycling rate, inability to achieve purity, pollution, etc., and achieve the effect of improving purity

Inactive Publication Date: 2019-03-08
大晶信息化学品(徐州)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And in the prior art, the recycling rate for dioxane is low, mainly because in the process of preparing PAC photosensitizer, dioxane is dissolved and polluted, and the purity is low, and the purity of reuse cannot be reached.

Method used

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  • Purifying method for crude dioxane

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Effect test

Embodiment 1

[0018] Such as figure 1 As shown, the present embodiment 1 provides a method for purifying the crude product dioxane, comprising: at least 5 recovery towers; the crude product dioxane is suitable for successively passing through each recovery tower for gradual purification. The recovery towers are all atmospheric towers. The specific purification process is as follows:

[0019] The first step of purification: the crude product dioxane (the content of dioxane is about 3-8%) is transported to the first recovery tower (independent gap operation), the temperature is controlled at 90-110°C, and the gas phase at the top of the tower passes through the condenser After condensation, it is collected in the middle tank of the first recovery tower (the content of dioxane is about 20%), and a certain reflux ratio is controlled; the bottom material (basically water) can be treated as wastewater.

[0020] The second step of purification: pump the material in the middle tank of the first r...

Embodiment 2

[0026] On the basis of embodiment 1, present embodiment 2 provides a kind of dioxane purification system, comprising:

[0027] At least 5 recovery towers.

[0028] For the specific structure and implementation process of the recovery tower, please refer to the relevant discussion of Embodiment 1, and details will not be repeated here.

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Abstract

The invention belongs to the field of new materials, and particularly relates to a purifying method for crude dioxane. According to the purifying method, at least five recycling towers are involved; and the crude dioxane is suitable to pass through each recycling tower in sequence for purifying gradually, so that the purity of the crude dioxane is improved.

Description

technical field [0001] The invention relates to the field of new materials, in particular to a method for purifying crude product dioxane. Background technique [0002] PAC photosensitizer (2,3,4,4-tetracarboxybenzophenone-1,2-diazidonaphthoquinone-5-sulfonate) is a product in the field of photosensitive chemistry and is a photodegradable photoresist One of the key raw materials. As the raw material for preparing PAC photosensitizer, dioxane also gradually increases with the consumption of PAC photosensitizer. In the prior art, the recycling rate of dioxane is relatively low, mainly because dioxane is dissolved and polluted in the process of preparing the PAC photosensitizer, and the purity is relatively low, which cannot reach the purity for reuse. Contents of the invention [0003] The purpose of this invention is to provide a kind of purification method of crude product dioxane, to improve the purity of crude product dioxane. [0004] In order to solve the above tech...

Claims

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Application Information

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IPC IPC(8): C07D319/12
CPCC07D319/12
Inventor 康文兵
Owner 大晶信息化学品(徐州)有限公司
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