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Preparation method of fatty alcohol polyoxyethylene ether

A technology of alcohol polyoxyethylene ether and fat, which is applied in the field of preparation of fatty alcohol polyoxyethylene ether, can solve the problems of product performance impact, narrow distribution, high content of free fatty alcohol, etc., achieve fast reaction speed, less catalyst consumption, The effect of high catalytic activity

Active Publication Date: 2012-05-30
三江化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the most used in industry is alkali catalyst, but the product of fatty alcohol polyoxyethylene ether prepared by alkali catalyst belongs to wide distribution, and the content of free fatty alcohol in its product is high, which greatly affects the performance of the product; using acid catalyst, although Its reaction temperature is lower than that of alkali catalysis, and the product distribution of fatty alcohol polyoxyethylene ether is narrow, but it is easy to generate by-products polyethylene glycol and dioxane
Alkaline earth metal catalysts are currently a research hotspot in the preparation of narrowly distributed fatty alcohol polyoxyethylene ethers. Conoco, Union Carbide and Shell Oil in the United States have published more than 20 patents on alkaline earth metal catalysts. The alkaline earth metals involved include barium , strontium, calcium and magnesium, and their salts include oxides, hydroxides, acetates and alkoxy compounds, but the distribution of fatty alcohol polyoxyethylene ethers prepared by these alkaline earth metal catalysts is still relatively wide, and its The performance of the obtained fatty alcohol polyoxyethylene ether product still has a lot of room for improvement

Method used

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  • Preparation method of fatty alcohol polyoxyethylene ether

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Mix 1g of magnesium carbonate and 60g of magnesium nitrate into 500g of potassium hydroxide aqueous solution containing 7.8% by weight of potassium hydroxide, stir well at 25°C, filter, place in an oven at 120°C, dry at 900°C Calcined for 6 hours to form granules and then sieved for use, and 48 g of composite basic catalysts with a particle size equal to or less than 0.1 mm were obtained by sieving.

[0040] Weigh the number of carbon atoms as C 8 ~C 10 280g of aliphatic alcohol joins in 1L autoclave, adds dodecyl dimethyl benzyl ammonium chloride 0.28g, above-mentioned composite basic catalyst 0.14g in autoclave successively while stirring, and autoclave uses N 2 permutation three times, at N 2 Under the condition of protection, heat up to 120°C, add ethylene oxide, after the amount of ethylene oxide added reaches 264g at 130°C and 0.01MPa, continue the reaction at 130°C and 0.01MPa for 0.5h, cool to 70°C, Blowing to obtain the fatty alcohol polyoxyethylene ether pr...

Embodiment 2

[0045] Mix 60g of calcium carbonate and 20g of strontium nitrate into 500g of sodium hydroxide aqueous solution containing 4% by weight of sodium hydroxide, stir thoroughly at 30°C, filter, dry in an oven at 120°C, and dry at 900°C Calcined for 6 hours to form granules and then sieved for use, and 70 g of composite basic catalysts with a particle size equal to or less than 10 mm were obtained by sieving.

[0046] Weigh the number of carbon atoms as C 28 ~C 30 287g of aliphatic alcohol joins in 1L autoclave, adds dodecyl dimethyl benzyl ammonium chloride 28g, above-mentioned composite basic catalyst 14g in autoclave successively while stirring, and autoclave uses N 2permutation three times, at N 2 Under the condition of protection, heat up to 120°C, add ethylene oxide, after the amount of ethylene oxide added reaches 277g at 200°C and 20MPa, continue to react at 200°C and 20MPa for 0.5h, cool to 70°C, discharge , to obtain the fatty alcohol polyoxyethylene ether product.

...

Embodiment 3

[0051] Mix 20g of barium carbonate and 1g of barium nitrate into 500g of lithium hydroxide aqueous solution containing 15.8% by weight of lithium hydroxide, stir well at 20°C, filter, dry in an oven at 120°C, and dry at 900°C Calcined for 6 hours to form granules and then sieved for use, and 14 g of composite basic catalysts with a particle size equal to or less than 1 mm were obtained by sieving.

[0052] Weigh the number of carbon atoms as C 12 ~C 14 The aliphatic alcohol 76g joins in the 1L autoclave, adds dodecyl dimethyl benzyl ammonium chloride 0.76g, the composite basic catalyst 0.076g of above-mentioned preparation successively in autoclave while stirring, autoclave uses N 2 permutation three times, at N 2 Under the condition of protection, heat up to 120°C, add ethylene oxide, after the amount of ethylene oxide added reaches 500g at 170°C and 10MPa, continue to react at 170°C and 10MPa for 0.5h, cool to 70°C, discharge , to obtain the fatty alcohol polyoxyethylene ...

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Abstract

The invention discloses a preparation method of fatty alcohol polyoxyethylene ether. The method comprises steps that: a composite basic catalyst and a cocatalyst are added to a fatty alcohol raw material; under the protection of inert gas, the temperature is increased to 100-140 DEG C; ethylene oxide is added to the mixture, and a fatty alcohol polyoxyethylene ether product is obtained after a reaction. The composite basic catalyst is composed of raw materials of, by weight: 20-79% of alkali metal hydroxide, 1-60% of alkaline earth metal nitrate, and 1-60% of alkaline earth metal carbonate. According to the fatty alcohol polyoxyethylene ether preparation method provided by the invention, the composite basic catalyst is adopted, such that the catalytic activity is high, the dosage of the catalyst is low, the reaction speed is high, and the relative molecular mass distribution of the obtained fatty alcohol polyoxyethylene ether product is relatively narrow. Fatty alcohol polyoxyethylene ether has excellent product performances of excellent decontamination capacity, excellent moistening capacity, excellent emulsification capacity, high compatibility, and good biodegradation performance.

Description

technical field [0001] The invention relates to the field of preparation of fatty alcohol polyoxyethylene ether, in particular to a method for preparing narrowly distributed fatty alcohol polyoxyethylene ether by using a composite basic catalyst. Background technique [0002] Fatty alcohol polyoxyethylene ether is an important class of nonionic surfactants with excellent wetting, emulsifying and decontamination capabilities. Fatty alcohol polyoxyethylene ether (AEO) and its Pingpingjia series products have been widely used in washing, Printing, textile, rubber and other different fields, among which polyethylene glycol monomethyl ether, propylene alcohol ethoxylate, etc. are the main raw materials for preparing polycarboxylate cement water reducer. [0003] The product performance of fatty alcohol polyoxyethylene ether varies with the number of ethoxy groups in the fatty alcohol polyoxyethylene ether molecule and the length of the carbon chain. It is a kind of mixture with d...

Claims

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Application Information

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IPC IPC(8): C08G65/28C07C41/03C07C43/11C07C43/15
Inventor 牛瑛山查立新彭义秋黄朝兵
Owner 三江化工有限公司
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