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Preparation method of fatty alcohol oxyalkylene addition compound

An alcohol alkylene oxide and adduct technology, which is applied in the preparation of ether from alkylene oxide, chemical instruments and methods, ether preparation, etc., can solve the problems of increased by-product content, large equipment corrosion, low reactivity, etc. Narrow, shortened reaction time and high catalyst activity

Active Publication Date: 2013-04-10
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the use of such a catalyst narrows the distribution, it also brings other problems, such as the increase of by-product content in the product, while HF and BF 3 , highly toxic
In addition, the use of this type of catalyst also has problems such as low reactivity and large corrosion to equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In a 500 ml autoclave equipped with a stirring and temperature control device, add 186 g of dodecyl alcohol, then add 0.05 g of magnesium tetrafluoroborate, replace the system with high-purity nitrogen for 3 times, and dehydrate at 120°C under reduced pressure for 1 Hour. Then start to drop 132 grams of oxirane, control reaction pressure is no more than 3 atmospheres. React at 120°C for 6 hours. After the reaction, lower the temperature to remove unreacted ethylene oxide to obtain 307 grams of polyoxyethylene lauryl ether adduct D1. The product is analyzed by GPC and GC, and the measurement result is: Mw / Mn=1.10, unreacted dodecyl alcohol was 5.5%, Weibull distribution coefficient c was 0.85.

Embodiment 2

[0040] Except that the amount of oxyethane added increases to 308 grams, other reaction conditions are identical with embodiment 1, can obtain 485 grams of polyoxyethylene polyoxyethylene ether adduct D2 of lauryl alcohol, product is through GPC and GC analysis, and measurement result is :

[0041] Mw / Mn=1.15, unreacted dodecyl alcohol was 2.5%, Weibull distribution coefficient c was 0.76.

Embodiment 3

[0043] Except that 0.05 gram of zinc hexafluorophosphate is used instead of magnesium tetrafluoroborate, other conditions are the same as in Example 1, and 305 grams of polyoxyethylene polyoxyethylene ether adduct D3 of lauryl alcohol can be obtained. The product is analyzed by GPC and GC, and the measurement result is :

[0044] Mw / Mn=1.06, unreacted dodecyl alcohol was 3.5%, Weibull distribution coefficient c was 0.65.

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PUM

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Abstract

The invention discloses a preparation method of a fatty alcohol oxyalkylene addition compound, which is characterized in that under the existence of a metallic compound taking an expression (1) as a feature, fatty alcohol reacts with oxyalkylene to prepare the fatty alcohol oxyalkylene addition compound, namely MbXFnm (1). In the expression, M refers to Ca, Mg, Al, Zn, Fe, Ti, Sc or La rare earthmetal atom, X refers to Si, B, P, As or Te atom, F refers to F atom and n refers to the number of F atoms, wherein, the valence number of m and the valence number of M are equal, and the valence number of b and the valence number of XFn are equal. In the preparation method, the catalyzer activity is high, and therefore, the reaction time is greatly shortened; unreacted fatty alcohol is less, addition can be carried out on more oxyalkylene, and the stink of the obtained fatty alcohol oxyalkylene adduct is low; the molecular weight distribution of the prepared fatty alcohol oxyalkylene adduct is narrow, and the distribution coefficient c of Weibull is smaller than 1.

Description

technical field [0001] The invention relates to a method for preparing fatty alcohol oxyalkylene adducts, and also relates to the prepared fatty alcohol oxyalkylene adducts having the characteristic of narrow molecular weight distribution and a catalyst related to the preparation of the fatty alcohol oxyalkylene adducts. Background technique [0002] Fatty alcohol oxyalkylene adducts are an important class of compounds that can be used as nonionic surfactants and are widely used in washing, textile printing and dyeing, pesticides, industrial cleaning and other industries. In addition, it can also be used as an intermediate to prepare various other anionic surfactants through sulfonation, phosphorylation, etc. Fatty alcohol oxyalkylene adducts can usually be prepared by addition reaction of fatty alcohol containing active hydrogen and oxyalkylene (such as ethylene oxide or propylene oxide) in the presence of a catalyst, and the product is a mixture of different degrees of pol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C43/11C07C41/03C08G65/28B01J27/14B01J27/138B01J27/125B01J27/12
Inventor 朱宏
Owner SOUTH CHINA NORMAL UNIVERSITY