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Method for producing trimethylolpropane by utilizing formaldehyde

A technology of trimethylolpropane and formaldehyde, which is applied in the preparation of hydroxyl compounds, chemical instruments and methods, and the preparation of organic compounds, etc., can solve the problems of low effective utilization rate of formaldehyde and high formate content, and improve the utilization rate of formaldehyde , low reaction temperature and improved utilization

Active Publication Date: 2012-03-28
SHANGHAI HUAYI GRP CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for producing trimethylolpropane by using formaldehyde, so as to solve the technical problems of low effective utilization rate of formaldehyde and high formate content in the existing trimethylolpropane production technology

Method used

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  • Method for producing trimethylolpropane by utilizing formaldehyde
  • Method for producing trimethylolpropane by utilizing formaldehyde
  • Method for producing trimethylolpropane by utilizing formaldehyde

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Mix 1800g of n-butyraldehyde with 5000g of 37% formaldehyde solution, stir at room temperature for 30 minutes, then raise the temperature to 65°C, and keep the temperature constant for 1 to 2 hours; at the same time, mix 0.375mol of tetraethylethylenediamine with 2000g of distilled water, and then Add the mixed solution of tetraethylethylenediamine into the mixed solution of formaldehyde and butyraldehyde, and stir vigorously for 2-60 hours at a reaction temperature of 0-90°C. After the stirring is completed, a mixed solution is obtained, which is named as condensation solution I. Liquid I was distilled at atmospheric pressure, and fraction II with a boiling point above 120°C was collected, Ni 0.2 Cu 0.8 O / Al 2 o 3 As a catalyst, at a reaction temperature of 60-300°C, a system pressure of 1.0-15.0MPa, and a space velocity of 1.0-10.0h -1 , and then carry out hydrogenation, rectification and recrystallization to the fraction II to obtain the product III.

[0023] Ana...

Embodiment 2～34

[0025] Test according to the various operation steps and conditions of Example 1, change the type and concentration of formaldehyde and the proportioning ratio with butyraldehyde, the type of solvent, the type of catalyst, parameters such as condensation reaction temperature and time; but the method of collecting cuts and adding The catalyst used for hydrogen and the corresponding process conditions are unchanged, and the results are shown in Table 1.

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Abstract

The invention discloses a method for producing trimethylolpropane by utilizing formaldehyde. The method comprises the following steps of: 1) adding nitrogen-containing organic matters shown as a formula (A) into mixed liquor of n-butanal and formaldehyde, reacting for 2-60 hours under the conditions that system pressure is 0.05-5MPa and reaction temperature is 0-90 DEG C to obtain a condensation liquid I; 2) carrying out atmospheric distillation on the condensation liquid I and collecting fraction II with the boiling point of above 120 DEG C; and 3) condensing and hydrogenating the fraction II to obtain the trimethylolpropane, wherein the condensing and hydrogenating conditions comprise that reaction temperature is 60-300 DEG C, system pressure is 1.0-15.0MPa and air speed is 1.0-10.0 / h<-1>, a catalyst adopted during condensing and hydrogenating is a supported catalyst, mole ratio of active components Cu and Ni of the supported catalyst is 1: 4, and a carrier is Al2O3. The method disclosed by the invention solves the technical problems that effective utilization rate of formaldehyde is low and formate content is high in the prior art and can be widely applied to industrialized mass production of trimethylolpropane.

Description

technical field [0001] The invention relates to a method for producing trimethylolpropane, in particular to a method for efficiently utilizing formaldehyde to produce trimethylolpropane. Background technique [0002] Trimethylolpropane (TMP for short) is a widely used organic chemical intermediate, which can improve the firmness, corrosion resistance and sealing performance of the resin, and has good stability to hydrolysis, pyrolysis and oxidation. Its main application fields There are: 1) synthesizing alkyd resin; 2) synthesizing advanced lubricating oil; 3) producing polyester, polyurethane foam and elastomer; 4) preparing plasticizer; 5) preparing emulsifier; 6) preparing liquid fuel additive; 7) Production of trimethylolpropane triacrylate (TMPTA); 8) production of trimethylolpropane trimethacrylate (TMPTM); 9) production of trimethylolpropane triglycidyl ester (TMPTE). [0003] Industrially, TMP is produced by condensation reaction of n-butyraldehyde and formaldehyde ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/22C07C29/141
Inventor 冯汝明杨旭石张传好廖本仁揭元萍张春雷
Owner SHANGHAI HUAYI GRP CO
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