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Production method of tripentaerythritol with purity of more than 90%

A technology for the production of tripentaerythritol, which is applied in ether separation/purification, ether preparation, organic chemistry, etc., can solve the problems of difficult separation, low purity, and low yield of tripentaerythritol, so as to improve the primary yield and increase production Efficiency and product quality have no effect

Active Publication Date: 2020-12-11
CHIFENG RUIYANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the current problems of low tripentaerythritol yield, high separation difficulty, and low purity, the purpose of the present invention is to provide a tripentaerythritol production method that can realize continuous production, high yield, easy separation, and purity greater than 90%.

Method used

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  • Production method of tripentaerythritol with purity of more than 90%

Examples

Experimental program
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Embodiment 1

[0022] Example 1: as figure 1 Shown, the crude product of tripentaerythritol continuous production system, it comprises four-tank reactor 1, continuous overflow crystallization device 2, filter 3 and filter cake buffer tank 4;

[0023] Four-tank series reactor 1 includes 1# condensation reactor, 2# condensation reactor, 3# condensation reactor and 4# condensation reactor, 1# condensation reactor and 2# condensation reactor are connected by pump; 2# condensation reactor Connect with 3# condensation reaction kettle by pump; 3# condensation reaction kettle and 4# condensation reaction kettle are connected by pump;

[0024] The continuous overflow crystallizing device 2 includes six crystallizing tanks connected in series, and the position of the previous crystallizing tank is higher than that of the next crystallizing tank. In this embodiment, the installation height difference of two adjacent crystallizing tanks is 50mm. The bottom outlet of the previous crystallizing tank is c...

Embodiment 2

[0026] Embodiment 2: the production method of tripentaerythritol with purity greater than 90%, it comprises the steps:

[0027] (1) Condensation reaction to prepare condensate: as figure 1 As shown, the four-pot series reactor 1 includes a 1# condensation reaction kettle, a 2# condensation reaction kettle, a 3# condensation reaction kettle and a 4# condensation reaction kettle, and the 1# condensation reaction kettle and the 2# condensation reaction kettle are connected by a pump; 2# The condensation reaction kettle and the 3# condensation reaction kettle are connected by a pump; the 3# condensation reaction kettle and the 4# condensation reaction kettle are connected by a pump. The molar ratio of formaldehyde, acetaldehyde and liquid caustic soda is 4.1-4.9:1:1.10-1.15 and put into 1# condensation reaction kettle, wherein the mass percent concentration of formaldehyde is 15%, the mass percent concentration of acetaldehyde is 25%, and the liquid The mass percentage concentrat...

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Abstract

The invention discloses a production method of tripentaerythritol with purity greater than 90%. The production method comprises the following steps: (1) carrying out condensation reaction to prepare acondensation solution; (2) crystallizing the condensation solution to prepare a crystallization solution; (3) filtering and separating the crystallization liquid to prepare a tripentaerythritol crudeproduct filter cake; (4) refining the tripentaerythritol crude product filter cake to obtain recrystallized liquid; (5) filtering and separating the tripentaerythritol recrystallized liquid to prepare a tripentaerythritol wet material; and (6) drying the tripentaerythritol wet material to obtain the finished product tripentaerythritol with the purity of more than 90%. According to the process disclosed by the invention, the tripentaerythritol can be extracted from the industrial pentaerythritol, the tripentaerythritol with the mass percentage content of 90% is produced, the yield of the tripentaerythritol product reaches 90% or above, and large-scale production of the tripentaerythritol is realized.

Description

Technical field: [0001] The invention relates to a method for producing tripentaerythritol, in particular to a method for producing tripentaerythritol with a purity greater than 90%. Background technique: [0002] Tripentaerythritol is an innovative basic chemical raw material with high added value, high technology content, and an emerging high-end fine petrochemical product. Tripentaerythritol products and derivatives are environmentally friendly and biodegradable. They are important raw materials for the synthesis of engineering plastics and environmentally friendly resins, high-performance aero-engine lubricants, advanced fire-retardant coatings, and solvent-free UV coatings. They are widely used in the coating industry, printing and textile industries. , aerospace industry, has an important position in high-end fine petrochemical products. [0003] At present, the annual output of primary tripentaerythritol in my country is less than 40 tons, and the demand is conservat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C41/01C07C41/34C07C41/40C07C43/13
CPCC07C41/01C07C41/34C07C41/40C07C43/135Y02P20/10
Inventor 全宏冬刘泉叶陆仟彭枝忠李权陈光洪张岩松李鸿雁
Owner CHIFENG RUIYANG CHEM
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