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Application of epoxy cardanol as bio-based hindered phenolic antioxidant

A cardanol and antioxidant technology, which is applied in the field of preparation of bio-based hindered phenol antioxidants, can solve the problems of harsh production conditions, limited promotion and application, expensive catalysts and the like, and achieves easy process control, wide sources and low prices. Effect

Inactive Publication Date: 2016-01-06
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to harsh production conditions, higher temperature, pressure, expensive catalyst and flammable hydrogen are required, its further application is limited.

Method used

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  • Application of epoxy cardanol as bio-based hindered phenolic antioxidant
  • Application of epoxy cardanol as bio-based hindered phenolic antioxidant
  • Application of epoxy cardanol as bio-based hindered phenolic antioxidant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh 5g of cardanol, 0.8g of formic acid, 0.1g of p-toluenesulfonic acid and 5mL of toluene, add them into a three-necked flask equipped with a condenser, a stirring rod and a thermometer, stir and heat up to 50°C, and dropwise add 5.5g of hydrogen peroxide (50%) , the dropping rate is 10mL / h, after the addition is completed, the reaction system is heated to 65°C for 3 hours; after the reaction, the crude product is obtained by static layering to obtain the organic phase, and the mass fraction of 50°C is 2% sodium bicarbonate solution and 50°C deionized water or distilled water until neutral, flash evaporated to remove water, and recovered the solvent to obtain the finished product of bio-based hindered phenolic antioxidant. The product is a yellow oily liquid with an epoxy value of 3.78%.

Embodiment 2

[0037] Weigh 5g of cardanol, 1.0g of acetic acid, 0.3g of 732 cation exchange resin and 5mL of n-hexane, add them into a three-necked flask equipped with a condenser, a stirring rod and a thermometer, stir and heat up to 55°C, and dropwise add 5.5g of hydrogen peroxide (50%) , the dropping rate is 10mL / h, after the addition is completed, the reaction system is heated to 65°C for 3.5 hours; after the reaction, the crude product is obtained by static layering to obtain the organic phase, and the mass fraction of 50°C is 2% sodium bicarbonate The solution and 50°C deionized water or distilled water were washed until neutral, the water was removed by flash evaporation, and the solvent was recovered to obtain the finished bio-based hindered phenol antioxidant. The product is a yellow oily liquid with an epoxy value of 3.42%.

Embodiment 3

[0039] Weigh 5g of cardanol, 0.9g of formic acid, 0.2g of p-toluenesulfonic acid and 10mL of toluene, add them into a three-neck flask equipped with a condenser, a stirring rod and a thermometer, stir and heat up to 50°C, and dropwise add 6.5g of hydrogen peroxide (30%) , the dropping rate is 50mL / h. After the addition, the temperature of the reaction system is raised to 65°C for 3.5h; after the reaction, the crude product is separated and separated to obtain the organic phase. The solution and 70°C deionized water or distilled water were washed until neutral, the water was removed by flash evaporation, and the solvent was recovered to obtain the finished product of bio-based hindered phenol antioxidant. The product is a yellow oily liquid with an epoxy value of 3.61%.

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PUM

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Abstract

The invention discloses application of epoxy cardanol as a bio-based hindered phenolic antioxidant. The epoxy cardanol as the bio-based hindered phenolic antioxidant is prepared by comprising the following steps: with cardanol as a raw material, under the action of a catalyst, dropwise adding a peroxy source and carrying out epoxidation reaction at 40 to 70 DEG C for 2 to 5 hours so as to prepare a crude epoxy cardanol, and carrying out aftertreatment so as to obtain an epoxy cardanol antioxidant. According to the invention, thermal oxidative aging resistance of the bio-based hindered phenolic antioxidant in the invention is superior to the thermal oxidative aging resistance of a general hindered phenolic antioxidant, i.e., 2,6-di-tert-butyl-4-methylphenol. Meanwhile, the bio-based hindered phenolic antioxidant has the advantages of wide raw material sources, low price, simple preparation process, low toxicity and environmental protection, can be extensively applied in vegetable oil and biodiesel, and has good application and development prospects.

Description

technical field [0001] The invention relates to the field of antioxidants, in particular to a preparation method and application of a bio-based hindered phenol antioxidant. Background technique [0002] In recent years, in order to prevent the toxicity of 2,6-di-tert-butyl-p-cresol (BHT) from affecting the use, some foreign companies, such as Roche, Ciba Fine Chemicals, BASF and other companies have launched "green" antioxidants. Antioxidants present in natural plants have attracted considerable attention because of their ability to directly scavenge peroxyl radicals formed during oxidative degradation and break the autoxidative chain reaction. Cardanol, the main component of cashew nut shell liquid, has significant antioxidant properties and is used as an additive in the food, lubricant, polymer and rubber industries. Cashew nut shell liquid is an important agricultural by-product of cashew nut production, with a wide range of sources and huge reserves. Therefore, using s...

Claims

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Application Information

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IPC IPC(8): C10L1/18C11B5/00C07D301/12C07D303/14
Inventor 蒋剑春陈洁聂小安李科黄金瑞王义刚
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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