Synthetic method of octadecyl erucyl amide

A technology of octadecyl erucamide and a synthesis method, which is applied in the field of synthesis of octadecyl erucamide, can solve the problems of poor activity stability, difficult product separation, long reaction time and the like, and saves solvents The effect of removal and product refining process, easy on-site operation and implementation, and low production cost

Active Publication Date: 2014-12-24
江西威科油脂化学有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The catalyst used in the synthesis of secondary fatty acid amides in China is usually silica gel (chromatographic silica gel) or activated alumina, which has poor activity, high acid value and amine value (>10), and long reaction time (10-20h ), the effect is poor; although the activity (conversion rate) of the titanate catalysts developed in recent years has increased, they have good compatibility with the product, are not easy to separate from the product, and have continuous catalytic oxidation to the product, thus limiting Its industrial application; although the activity and selectivity of alkyl tin catalyst are better, the price is expensive, and most varieties are poisonous, which also limits its scope of application; existing solid superacid catalyst and special molecular sieve The reaction effect is good, but it is easy to produce isomerization by-products in the synthesis reaction of secondary fatty acid amides; metal hydrated oxide (composite) catalysts have poor activity and stability

Method used

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  • Synthetic method of octadecyl erucyl amide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Add 560g of octadecylamine and 680g of erucic acid into the 3L reactor respectively, then raise the temperature to 130°C, start the stirring in the reactor, and remove the moisture in the reactor, then add 4.08g of catalyst, and continue to heat up to 190°C ℃ to start the reaction, control the reaction temperature at 190±1℃, the early stage (first 2h) reaction is evacuated under normal pressure under the protection of nitrogen; the later stage reaction is carried out under reduced pressure (vacuumization), and the reaction time is 3h and then cooled to 100℃ , and then filter the catalyst through a bag filter, then cool the filtrate, slice and shape it, and obtain a finished product. Then detect the synthetic conversion rate and product quality, the results are shown in Table 1.

[0016] Catalyst preparation: Dissolve 8g of phosphotungstic acid in 150ml of ethylene glycol and ethanol (1:1) mixed solvent to obtain a phosphotungstic acid solution; add 72g of chromatographi...

Embodiment 2

[0018] Add 600g of octadecylamine, 690g of erucic acid, and 4.83g of catalyst into a 3L reactor (composition of the catalyst: 15% silicotungstic acid, 15% metatitanic acid, 70% chromatography silica gel), method and implementation Example 1 is the same.

Embodiment 3

[0020] In 3L reactor, add 630g octadecylamine and 760g erucic acid, and 6.08g catalyst (catalyst component composition: phosphomolybdic acid 12%, metatitanic acid 25%, chromatography silica gel 63%), method and embodiment 1 same.

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Abstract

The invention discloses a synthetic method of octadecyl erucyl amide. The synthetic method is characterized in that octadecyl amine and erucic acid are selected as raw materials according to comprehensive factors such as source and price of raw materials, the yield of the octadecyl erucyl amide, the difficulty level in controlling byproducts and environmental influence of synthetic reaction, the raw materials directly react in the presence of a catalyst, and the octadecyl erucyl amide is synthesized by a one-step process. The catalyst consists of solid strong acid, 12-30% of metatitanic acid and 50-88% of silica gel for chromatography. The solid is one of 0-12% of phosphomolybdic acid or 0-20% of silicotungstic acid or 0-15% of phosphotungstic acid. The catalyst is prepared by processes of loading and activating. The synthetic method has the advantages that site operation performance is simple and easy, processes of refining and purifying octadecyl erucyl amide are omitted, the production process is free of a solvent and environmental pollution, the octadecyl erucyl amide yield is high, the synthetic method is environment-friendly, the production cost is low, and the large-scale high-grade production can be realized.

Description

technical field [0001] The invention relates to a method for synthesizing secondary fatty acid amides, in particular to a method for synthesizing octadecyl erucamide. Background technique [0002] Octadecylerucamide, chemical name: N-octadecyl-13-docosenoic acid amide, molecular formula: C 40 h 79 ON, CAS NO.: 10094-45-8, is a new type of rubber and plastic additive that is urgently needed in China, has a good export prospect, and has high added value. It is very suitable for the development and development of my country. Scratch, antistatic and mold release effects. Because of its long molecular carbon chain, it has excellent lubricity and mold release performance, good oxidation resistance and high temperature resistance, and is the first choice for replacing high-priced petroleum lubricants. It can be used in engineering materials and ultra-high Adding applications to molecular weight resins, the dosage is increasing significantly with the continuous growth of high-temp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C233/09C07C231/02
Inventor 吴贵岚聂海平吴剑朱冬秀陈建平吴相岚
Owner 江西威科油脂化学有限公司
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