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Preparation method of epoxy modified castor oil

A technology of epoxy modification and castor oil, which is applied in the direction of fatty acid production, fatty acid esterification, fatty acid chemical modification, etc. It can solve the problems of low epoxy value, complicated preparation process and high preparation cost of modified castor oil, and achieve color and luster Stability, simple synthetic route, high epoxy value

Active Publication Date: 2015-02-04
INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current reports on epoxy castor oil still have problems such as low epoxy value, deep color, complex preparation process and high preparation cost of modified castor oil products.

Method used

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  • Preparation method of epoxy modified castor oil

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of epoxy-modified castor oil comprises the steps: A, add castor oil 100.0g in the 250mL flask that is equipped with thermometer, stirrer, distillation head, SiO 2 -Al 2 o 3 3.5g of solid acid catalyst, heated to 230°C for dehydration treatment under the condition of vacuum degree of 1mm Hg, reacted for 2.5h; B, then cooled down to 45°C, and started to add 46.0g of peracetic acid dropwise for 1.5h , Carry out epoxidation reaction at 55°C for 3.0h after the dropwise addition; At ℃, the vacuum distillation was stopped to obtain epoxy-modified castor oil.

[0024] The epoxy value of the product is 6.1%, the iodine value is 3.1g iodine / 100g oil, and the color iron-cobalt colorimetry is 1#.

Embodiment 2

[0026] Add 100.0 g of castor oil and 1.6 g of Amberlyst15 solid acid catalyst to a 250 mL flask equipped with a thermometer, agitator, and a distillation head, and heat to 220° C. for dehydration treatment under a vacuum of 8 mm Hg, and react for 3.0 h; Then lower the temperature to 40°C, and start to add 25.0g of hydrogen peroxide dropwise for 1.5h. After the dropwise addition, carry out the epoxidation reaction at 55°C for 4.0h; , Carry out underpressure distillation under 60 ℃, when distillation outlet temperature drops to 40 ℃, stop underpressure distillation, make epoxy dehydration castor oil.

[0027] The epoxy value of the product is 6.3%, the iodine value is 3.2g iodine / 100g oil, and the color iron-cobalt colorimetry is 1#.

Embodiment 3

[0029] Add 100.0g of castor oil and 2.6g of B2O3-Al2O3 solid acid catalyst into a 250mL flask equipped with a thermometer, agitator, and a distillation head, and heat to 240°C for dehydration treatment under a vacuum of 2 mm Hg. The reaction is 1.5 h. Then the temperature was lowered to 40° C., and 85.0 g of peracetic acid was added dropwise for 2.0 hours. After the dropwise addition, the epoxidation reaction was carried out at 55° C. for 3.0 hours. After the reaction was finished, the particulate matter was filtered off, and vacuum distillation was carried out at a vacuum of 2 mm Hg at 50° C. When the distillation outlet temperature dropped to 40° C., the vacuum distillation was stopped to obtain epoxy dehydrated castor oil.

[0030] The epoxy value of the product is 6.8%, the iodine value is 3.0g iodine / 100g oil, and the iron-cobalt colorimetry is 1-2#.

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Abstract

The invention discloses a preparation method of epoxy modified castor oil. The preparation method sequentially comprises the following steps: 1, carrying out a heat insulation reaction of castor oil in the presence of a solid acid catalyst under a degree of vacuum of 1-10mm Hg at 220-250DEG C for 1-3h, wherein a mass percentage ratio of castor oil to the solid acid catalyst is 100:1.6-100:5; and 2, cooling a material obtained in step 1 to 30-50DEG C, adding a peroxide having a mass being 20-150wt% of the mass of the castor oil in a dropwise manner, carrying out a heat insulation reaction at 40-70DEG C for 3-6h after the dropwise addition, and purifying to obtain the epoxy modified castor oil. The epoxy modified castor oil prepared by adopting the preparation method has the characteristic of slow oil film drying, no yellowing, large toughness, high epoxy value, light color, simple preparation technology and low preparation cost. The above filtration is used for removing particles in reaction materials.

Description

technical field [0001] The invention relates to a preparation method of epoxy-modified castor oil. Background technique [0002] Castor oil is a vegetable oil with unique properties in nature. Its fatty acid composition is mainly ricinoleic acid. Because the fatty acid chain has hydroxyl groups, it has active chemical properties and can be epoxidized to produce epoxy castor oil. Epoxy castor oil has a wide range of uses in plastics, coatings, rubber and other industrial fields, and can endow the product with excellent thermal stability, weather resistance, and does not reduce the softening point of the product. Therefore, the research and development of modified products of castor oil and the use of renewable vegetable oil products to replace petrochemical products have practical significance for the deep processing of vegetable oil and the sustainable development. [0003] Epoxy castor oil (ECO) is one of the important oils in epoxy oils. It has good light stability, low v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C11C3/04C11C3/00
Inventor 刘鹤商士斌宋湛谦黄旭娟
Owner INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
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