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Method for synthesizing esterified wax

A synthesis method and a technology for esterifying wax, which are applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve the problems of long reaction time and complicated operation, and achieve short reaction time, less variety of materials, and cost saving. Effect

Inactive Publication Date: 2012-06-20
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the esterification value of this product is 70-80mgKOH / g, the operation is complicated, the reaction time is long, and the polymerization aid dicumyl oxide is added

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Add 20 grams of microcrystalline wax and 1 gram of tetracosan alcohol into a 250 ml three-necked flask equipped with a thermometer, an inlet pipe and an exhaust pipe, and raise the temperature to 120 ° C. After the microcrystalline wax and tetracosan alcohol are melted, add Weakly acidic esterification catalyst p-toluenesulfonic acid 0.04 g, heat up to 150 ° C, feed 2.0 L / (h g) of oxygen, react for 6 hours, after the oxidative esterification reaction is completed, pour it out while it is hot, and obtain 21 g of the product about. (the main product structural formula of embodiment 1: C n-1 h 2n+1 COOC m h 2m+1， where n=30~60, m=24)

Embodiment 2

[0027] The steps are the same as in Example 1, except that the consumption of tetracosanol is changed to 4 grams, p-toluenesulfonic acid is changed to sulfurous acid, and the consumption is changed to 0.1 grams to obtain about 24 grams of the final product. (the main product structural formula of embodiment 2: C n-1 h 2n+1 COOC m h 2m+1， where n=30~60, m=24)

Embodiment 3

[0029] Add 20 grams of microcrystalline wax and 1 gram of stearyl alcohol to a 250 ml three-necked flask equipped with a thermometer, an air inlet pipe and an exhaust pipe, and raise the temperature to 120°C. After the microcrystalline wax and stearyl alcohol are melted, add a weakly acidic esterification Catalyst 0.04 g of p-toluenesulfonic acid, heat up to 150 ° C, feed 2.0 L / (h g) of oxygen, react for 6 hours, after the oxidative esterification reaction, pour it out while it is hot, and get about 21 g of the product. (the main product structural formula of embodiment 3: C n-1 h 2n+1 COOC m h 2m+1， where n=30~60, m=18)

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Abstract

The invention relates to a method for synthesizing an esterified wax, in particular to a method for synthesizing an esterified wax from a microcrystalline wax used as a raw material through oxidation and esterification in one step. The product prepared by adopting the method can partially replace the natural carnauba wax and has the general formula of Cn-1H2n +1COOCmH2m-1 (n=30 to 60, and m=18 to 24), the acid value of 2-10mgKOHg / and the esterification value of 70-86mgKOH / g. The method for synthesizing the esterified wax comprising the following steps: adding the microcrystalline wax and a high-carbon alcohol (CnH2n +1OH, wherein n=8 to 24) at the mass ratio of 5-20:1 into a three-mouth flask, heating to melt the microcrystalline wax, adding weak-acid esterification catalyst, introducing quantitative oxygen, controlling reaction temperature, taking out the product while the product is hot after the reaction of a certain period of time finishes, and weighting. The product synthesized by adopting the method has a higher esterification value and a lower acid value than the product synthesized by steps.

Description

technical field [0001] The invention relates to the technical field of novel macromolecular functional materials, in particular to a method for synthesizing esterified wax by oxidative esterification using microcrystalline wax as a raw material. Background technique [0002] The raw material of traditional synthesis of esterified wax is mainly paraffin wax, which is processed by a step-by-step method, that is, paraffin wax is first oxidized into oxidized wax, and then esterified with alcohols to generate esterified wax. [0003] Patent [CN1123286A A kind of preparation method of high ester value wax] has reported to use unsaturated carboxylic acid or acid anhydride and monohydric alcohol to esterify under the condition of acidic catalyst, then this esterified product and polyolefin wax and petroleum hydrocarbon wax are in activator Carry out free radical copolymerization reaction under certain conditions to prepare high ester value wax. Although the product has an esterific...

Claims

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Application Information

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IPC IPC(8): C07C69/26C07C67/08
Inventor 杨基和安晓杰孔泳花蓓蓓徐婷婷
Owner CHANGZHOU UNIV
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