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Production method of neopentyl glycol

A technology of neopentyl glycol and production method, which is applied in chemical instruments and methods, preparation of organic compounds, separation/purification of hydroxyl compounds, etc., can solve the problems of cumbersome process and large investment, and achieve simple process and product quality. Good and low energy consumption

Inactive Publication Date: 2015-06-03
ZHANHUA YUKAI NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0028] The disadvantage of the above-mentioned method is that the investment is large and the process is relatively cumbersome.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] The production method of neopentyl glycol comprises the following steps:

[0055] (1) condensation

[0056] With isobutyraldehyde and formaldehyde as raw material, the feed volume ratio of described isobutyraldehyde and formaldehyde is 1:17;

[0057] Prepare the raw materials, put the raw materials in the reaction kettle to react, and obtain the reaction solution, control the temperature in the reaction kettle not to exceed 40°C, add NaOH at a uniform speed while reacting, and make the pH of the reaction solution about 13.0 after adding NaOH After adding NaOH, the reaction solution in the reaction kettle is stirred evenly, the material pouring valve of the reaction kettle is opened, the material is input into the heating kettle, the temperature is raised to 55° C., kept at this temperature for 2 hours, and then the temperature is raised for the second time. After rising to 70°C, keep it for 1.5 hours, neutralize with formic acid until the pH value of the solution is 7....

Embodiment 2

[0070] The production method of neopentyl glycol comprises the following steps:

[0071] (1) condensation

[0072] With isobutyraldehyde and formaldehyde as raw material, the feed volume ratio of described isobutyraldehyde and formaldehyde is 1:15;

[0073] Prepare the raw materials, put the raw materials in the reaction kettle to react, and obtain the reaction solution, control the temperature in the reaction kettle not to exceed 40°C, add NaOH at a uniform speed while reacting, and make the pH of the reaction solution about 13.0 after adding NaOH After adding NaOH, the reaction solution in the reactor is stirred evenly, the material pouring valve of the reactor is opened, the material is input into the heating kettle, the temperature is raised to 50° C., kept at this temperature for 1.5 hours, and then the temperature is raised for the second time. After rising to 70°C, keep it for 1.5 hours, neutralize with formic acid until the pH value of the solution is 6.8, and then tr...

Embodiment 3

[0083] The production method of neopentyl glycol comprises the following steps:

[0084] (1) condensation

[0085] With isobutyraldehyde and formaldehyde as raw material, the feed volume ratio of described isobutyraldehyde and formaldehyde is 1:19;

[0086] Prepare the raw materials, put the raw materials in the reaction kettle to react, and obtain the reaction solution, control the temperature in the reaction kettle not to exceed 40°C, add NaOH at a uniform speed while reacting, and make the pH of the reaction solution about 13.0 after adding NaOH After adding NaOH, the reaction solution in the reactor is stirred evenly, the material pouring valve of the reactor is opened, the material is input into the heating kettle, the temperature is raised to 50° C., kept at this temperature for 1.5 hours, and then the temperature is raised for the second time. Rise to 70°C and keep for 2.0 hours, neutralize with formic acid until the pH of the solution is 7.2, and then transfer the rea...

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Abstract

The invention belongs to the technical field of chemical production, and particularly relates to a production method of neopentyl glycol. The production method of the neopentyl glycol comprises the following three steps: condensation, evaporation and distillation, and specifically comprises the following steps: with isobutyraldehyde and formaldehyde as raw materials, carrying out condensation reaction; adding alkali in the reaction process, warming for the second time, evaporating through an evaporator, and separating the neopentyl glycol from other substances; and finally obtaining a finished product neopentyl glycol by distillation. Compared with the methods disclosed by the prior art and background art, the method provided by the invention is low in energy consumption, and simple in technology; and the product is good in quality and low in investment cost.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a production method of neopentyl glycol. Background technique [0002] With the development of society and the improvement of people's consumption level, people pay more and more attention to the problems of environment and energy saving. Since the 1990s, energy-saving, low-pollution powder and high-solid coatings have developed rapidly abroad, and have a tendency to replace solvent-based coatings. In recent years, my country's powder coating equipment has also followed the international trend, or it has been introduced by joint ventures, or built by itself, and its development speed is rapid. Lagging, a large amount of neopentyl glycol needs to be imported every year, and the supply is basically in short supply. Therefore, the product has broad development prospects and huge market potential. [0003] Neopentyl glycol has a wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/20C07C29/38C07C29/14C07C29/76
CPCC07C29/38C07C29/76C07C31/20
Inventor 孙淑华尚立涛
Owner ZHANHUA YUKAI NEW MATERIAL TECH
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