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Preparation method of high-acid saponified oxidized wax

A technology for oxidizing wax and high-acid soap, applied in the chemical industry, can solve the problems of less oxidation reports of paraffin wax and microcrystalline wax, and achieve the effects of short reaction time, low reaction temperature and convenient operation

Inactive Publication Date: 2013-12-25
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN1206719A has reported the method for oxidizing ethylene homopolymer and copolymer wax by air, and the acid value and saponification value of the oxidized wax of its preparation are respectively 18mgKOH / g, 40mgKOH / g; Described polyethylene wax polypropylene in CN101082000A patent The method for the co-oxidation of wax and petroleum wax, the acid value and saponification value of the oxidized wax prepared by it can reach 29.6mgKOH / g, 56.8mgKOH / g; CN101289540A, CN101724107A have reported the oxidation method of polyethylene wax or polyethylene wax emulsion, and There are few reports on the oxidation of paraffin wax and microcrystalline wax

Method used

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  • Preparation method of high-acid saponified oxidized wax
  • Preparation method of high-acid saponified oxidized wax
  • Preparation method of high-acid saponified oxidized wax

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh a certain mass ratio of paraffin wax and microcrystalline wax, heat the three-necked flask with an oil bath to make it melt completely, and at 140°C, use manganese acetate as a catalyst and stearic acid as an auxiliary agent, and control the oxygen flow rate to 80mL / min. After oxidizing for 4 hours, after the reaction, the sample was taken out, molded, and its properties were measured. The results are shown in Table 1.

[0021] Table 1 Catalytic oxidation results of manganese acetate

[0022]

[0023] As can be seen from Table 1, when manganese acetate is used as a catalyst and stearic acid is used as an auxiliary agent, the obtained oxidized wax product has a lower acid value, saponification value, and darker color.

Embodiment 2

[0025] Using manganese sulfate as a catalyst and stearic acid as an auxiliary agent, the method is the same as in Example 1, and the results are shown in Table 2.

[0026] Table 2 Catalytic oxidation results of manganese sulfate

[0027]

[0028] Comparing Table 1 and Table 2, under the same conditions, when manganese sulfate is used as catalyst and stearic acid is used as auxiliary agent, the obtained oxidized wax product has higher acid value, saponification value and lighter color.

Embodiment 3

[0030] Weigh a certain mass ratio of paraffin wax and microcrystalline wax, add it to a three-necked flask, heat it in an oil bath to make it melt completely, and at a certain temperature, use manganese sulfate as a catalyst and stearic acid as an auxiliary agent to control the oxygen flow rate to 80mL / min, oxidized for 4h, after the reaction, the sample was taken out, molded, and its properties were measured. The results are shown in Table 3.

[0031] Table 3 Effect of reaction temperature on properties of oxidized wax

[0032]

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PUM

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Abstract

The invention discloses a preparation method of high-acid saponified oxidized wax, which comprises the following steps: heating paraffin and microcrystalline wax to completely melt the paraffin and microcrystalline wax, respectively adding a catalyst and an assistant, and introducing oxygen at constant flow rate to react, wherein the catalyst is manganese acetate or manganese sulfate, the assistant is stearic acid, the reaction temperature is 130-180 DEG C, the reaction time is 1-7 hours, and the flow rate of oxygen is 50-110 mL / min. The acid value of the oxidized wax is 27.95 mg KOH / g, and the saponification value is 69.78 mg KOH / g. The preparation method has the advantages of simple technique, short reaction time and low reaction temperature, and is convenient to operate; and the prepared oxidized wax product has the advantages of light color, light smell and high saponification value.

Description

technical field [0001] The invention belongs to the field of chemical industry, and in particular relates to a method for preparing high-acid soap oxidized wax by oxidizing molten paraffin and microcrystalline wax mixture with oxygen. Background technique [0002] As an important chemical product, paraffin is widely used in food, medicine, daily chemical, leather, textile and other fields. my country is a big producer of paraffin, but my country's paraffin products are mainly used in primary traditional enterprises. Unprocessed paraffin wax has low viscosity, poor flexibility and is difficult to emulsify. Microcrystalline wax is a hydrocarbon wax separated from the residual oil in the vacuum distillation kettle, which has good luster and high melting point. Adding a certain amount of microcrystalline wax to paraffin wax can improve the performance of paraffin wax. [0003] Oxidation of molten wax with air or oxygen introduces polar functional groups into hydrocarbons. Due...

Claims

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Application Information

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IPC IPC(8): C10G73/38
Inventor 林树坤汪程红
Owner FUZHOU UNIV
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