Rice bran wax acid ester wax and preparation method thereof

A technology of rice bran wax ester and rice bran wax, which is applied in the preparation of carboxylic acid ester, the preparation of carboxylic acid by oxidation, chemical instruments and methods, etc., can solve problems such as supply stoppage, and achieve improved hardness and gloss, stable structure, and production cost. low effect

Inactive Publication Date: 2018-06-08
重庆合才化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the technical problem that the existing Mengtan E wax may be discontinued at any time due to the impact of resource depletion and greenhouse gas emission reduction, the present invention provides a method for preparing rice bran wax ester wax. The rice bran wax ester wax produced by the method is , which is close to Montan E wax in terms of chemical structure and use effect, so it can replace the Montan E wax imported from Germany

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The invention provides a method for preparing light-colored rice bran wax acid wax, comprising the following steps:

[0018] Deoiling: Put the deoiled and unbleached rice bran wax into a stainless steel reactor and soak it in ethyl acetate with a concentration of 99.7% for 4 hours, then open the valve under the stainless steel reactor to pump the ethyl acetate into the storage tank for distillation and recovery , the deoiled rice bran wax is heated to 90°C and melted, then cooled and sliced ​​for later use;

[0019] Oxidation: Put 600kg of sliced ​​rice bran wax and 2000ml of 50% dilute sulfuric acid into the enamel reaction kettle, heat to 90°C to melt the rice bran wax, then add 1900ml of 50% red alum sodium solution for oxidation, and keep the temperature at 90 ℃ and kept stirring for 6 hours, the color of rice bran wax changed from brown to light, cooled naturally, and allowed to stand for 1 hour to separate the wax and chromium slurry solution. Pump into another e...

Embodiment 2

[0023] The invention provides a method for preparing light-colored rice bran wax acid wax, comprising the following steps:

[0024] Deoiling: Put the deoiled and unbleached rice bran wax into a stainless steel reactor and soak it in ethyl acetate with a concentration of 99.7% for 4 hours, then open the valve under the stainless steel reactor to pump the ethyl acetate into the storage tank for distillation and recovery , the deoiled rice bran wax is heated to 95°C and melted, then cooled and sliced ​​for later use;

[0025] Oxidation: Put 650kg of sliced ​​rice bran wax and 2200ml of 50% dilute sulfuric acid into an enamelled reaction kettle, heat to 95°C to melt the rice bran wax, then add 2000ml of 50% red alum sodium solution for oxidation, and keep the temperature at 95 Stir continuously at ℃ for 6 hours, the color of rice bran wax changes from brown to light, cool naturally, let stand for 1.5 hours to separate the wax and chromium slurry solution, the chromium slurry in th...

Embodiment 3

[0029] The invention provides a method for preparing light-colored rice bran wax acid wax, comprising the following steps:

[0030] Deoiling: Put the deoiled and unbleached rice bran wax into a stainless steel reactor and soak it in ethyl acetate with a concentration of 99.7% for 4 hours, then open the valve under the stainless steel reactor to pump the ethyl acetate into the storage tank for distillation and recovery , the deoiled rice bran wax is heated to 100°C and melted, then cooled and sliced ​​for later use;

[0031] Oxidation: Put 550kg of sliced ​​rice bran wax and 1800ml of 50% dilute sulfuric acid into the enamel reaction kettle, heat to 100°C to melt the rice bran wax, then add 1800ml of 50% red alum sodium solution for oxidation, and keep the temperature at 100 Stir continuously at ℃ for 6 hours, the color of rice bran wax changes from brown to light, cool naturally, let stand for 2 hours to separate the wax and chromium slurry solution, the chromium slurry in the...

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PUM

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Abstract

The invention provides a preparation method of a rice bran wax acid ester wax. The method comprises the following steps of deoiling, soaking a deoiled and non-discolored rice bran wax through ethyl acetate, heating for melting, cooling, and slicing for standby use; oxidizing: heating the sliced rice bran wax and dilute sulphuric acid for melting the rice bran wax, then adding a sodium bichromate solution, and continuously stirring and oxidizing; heating the oxidized rice bran wax into a liquid, then feeding a dilute sulphuric acid for stirring, standing for layering, then adding water while stirring while heating until the wax is completely melted, then continuously stirring, and standing for layering to obtain a rice bran wax acid wax; preparing and melting: heating and melting the rice bran wax acid wax, then heating, and adding polyhydric alcohols and the rice bran wax acid wax for carrying out esterification reaction to obtain the rice bran wax acid ester wax. The invention also provides the rice bran wax acid ester wax. The rice bran wax is oxidized through the sodium bichromate so as to generate the rice bran wax acid wax, the rice bran wax acid wax is esterified with the polyhydric alcohols to generate the rice bran wax acid ester wax with a longer chain, and the rice bran wax acid ester wax is low in production cost, high in product hardness and glossiness, and capableof effectively replacing a montan E wax.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a rice bran wax ester wax and a preparation method thereof. Background technique [0002] At present, the waxes synthesized by the esterification of long-chain fatty wax acids and polyols are mainly Montan E waxes produced by German Clariant and Volpker companies. This wax is widely used in industries such as electronic plastic packaging, engineering plastics, and leather processing. The raw material of Montan E wax is crude Montan wax, which is extracted from lignite with a wax content of more than 10%. But the inventor of the present invention has found through research that this lignite global resource is scarce, and the lignite that has extracted wax can only be used for thermal power generation because the combustion value is not high; 2 , causing the greenhouse effect, does not comply with the German government's environmental protection policy, and becomes the targe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C67/08C07C69/28C07C69/003
CPCC07C29/095C07C51/16C07C67/08C07C69/28C07C69/003C07C53/126C07C31/02
Inventor 邱三明邱汀远
Owner 重庆合才化工科技有限公司
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