Production technology for further purifying tripentaerythritol

A tripentaerythritol, production process technology, applied in ether separation/purification, ether preparation, organic chemistry, etc., can solve problems such as ash content, high color number, poor solubility, unstable products, etc., to reduce ash content and color number, improve The effect of improving purity and quality

Inactive Publication Date: 2019-06-21
PUYANG YONGAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Tripentaerythritol is a by-product of the condensation reaction of formaldehyde and acetaldehyde under the action of calcium hydroxide or sodium hydroxide catalyst to form pentaerythritol and dipentaerythritol, and also produces pentaerythritol acetal, dipentaerythritol acetal, tripentaerythritol acetal Products, the solubility of these by-products is very poor, which will adversely affect the separation and purification of tripentaerythritol
Although the production and separation technology of tripentaerythritol is disclosed, in actual production, due to the influence of acetal by-products, the ash content and color number of the tripentaerythritol product produced are relatively high, and the transparency and color of the composition are affected. Unstable, the content of tripentaerythritol produced by testing is 80%~90%, the ash content is 1%~2%, and the color number is 4#~6#

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] The production technique of described further purification tripentaerythritol comprises the following steps:

[0022] Step 1: adding the crude product of tripentaerythritol with a content of 80%, ash content of 2%, and color number 6# prepared by the above preparation process into a solvent tank;

[0023] Step 2: Add an organic solvent into the solvent tank in Step 1 and stir for 10-90 minutes, the stirring temperature is controlled at 50-120°C, and the mass ratio of tripentaerythritol to organic solvent is 1:3;

[0024] Step 3: Transport the mixture in the solvent tank in step 2 to a precision separation device, and transport the separated acetals, alcohols, and formates to the tripentaerythritol hydrolysis, decolorization and crystallization processes, and separate them through the tripentaerythritol separation process The crude product of tripentaerythritol, the filtered liquid is sent to the desolventizing tower, and the solvent is recycled;

[0025] Step 4: Send t...

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Abstract

The invention relates to a production technology for further purifying tripentaerythritol. The production technology comprises the following steps: step I: adding a tripentaerythritol crude product into a solvent kettle, step II: adding an organic solvent into the solvent kettle to dissolve the tripentaerythritol crude product, step III: separating acetal, alcohol and methylate, and step IV: performing drying, crushing and packaging. According to the production technology, produced high color number and high ash tripentaerythritol is added into the organic solvent and dissolved in the organicsolvent; acetal, alcohol and methylate are not dissolved; tripentaerythritol is extracted using different solubility of tripentaerythritol, acetal, alcohol and methylate; the purity of a product is improved; an ash content and a color number of the product are reduced; overall improvement of quality of tripentaerythritol is achieved.

Description

technical field [0001] The invention relates to a preparation process of tripentaerythritol, in particular to a production process for further purifying tripentaerythritol. Background technique [0002] Tripentaerythritol is a raw material for engineering plastics, environmentally friendly resins, and high-performance aviation and aerospace engine lubricants. It is environmentally friendly and biodegradable. It can also be used as an important raw material for the synthesis of advanced fire-resistant coatings and solvent-free UV coatings. It is widely used in the polymer industry, Coatings industry, printing and textile industry, and aerospace industry play an important role in high-end chemical products. [0003] Tripentaerythritol is a by-product of the condensation reaction of formaldehyde and acetaldehyde under the action of calcium hydroxide or sodium hydroxide catalyst to form pentaerythritol and dipentaerythritol, and also produces pentaerythritol acetal, dipentaeryth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/34C07C41/36C07C43/13
Inventor 王永军
Owner PUYANG YONGAN CHEM IND
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