A kind of fatty alcohol block polyether with good low temperature stability and its preparation method and application

A block polyether and fatty alcohol technology, which is applied in the field of fatty alcohol block polyether and its preparation, can solve the problems of poor product emulsification, product performance impact, high viscosity, etc., and achieve excellent penetration and wetting performance, reaction induction Short-term, high-reactivity effects

Active Publication Date: 2021-01-05
ZHEJIANG HUANGMA TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the fatty alcohol block polyether prepared by using an alkali metal catalyst has a high content of free fatty alcohol in the product, resulting in high viscosity, poor low-temperature fluidity, low-temperature turbidity, and stratification, which greatly affects product performance; the use of acid catalysts, although Its reaction temperature is lower than that of alkali metal catalysis, and the content of free fatty alcohol is lower, but it is easy to generate by-product polyethylene glycol and dioxane, and the reaction is difficult to control
Alkaline-earth metal catalysts are currently a research focus in the preparation of fatty alcohol block polyethers. The alkaline-earth metals involved include barium, strontium, calcium and magnesium, and their oxides, hydroxides, acetates and alkoxylates. The fatty alcohol block polyethers prepared by these alkaline earth metal catalysts have low reactivity, long reaction induction period, and poor emulsifying power of the product.

Method used

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  • A kind of fatty alcohol block polyether with good low temperature stability and its preparation method and application
  • A kind of fatty alcohol block polyether with good low temperature stability and its preparation method and application
  • A kind of fatty alcohol block polyether with good low temperature stability and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Preparation of cetyl alcohol polyoxypropylene polyoxyethylene ether

[0035] Add 1.0mol (242.0g) n-hexadecanol and 1.22g (relative to 0.15wt% of the total mass of cetyl alcohol, propylene oxide and ethylene oxide) composite catalyst (barium acetate: stannous oxalate) in a 2.5L high temperature and high pressure reactor =4:1). Seal the reaction kettle well, replace it with nitrogen gas twice, wait until the temperature of the kettle rises to 110-120°C, and then vacuumize for 1 hour to remove moisture. After dehydration, keep the temperature of the reactor at 110-115°C, start adding 6mol (348g) of propylene oxide, control the pressure below 0.4MPa, finish adding in 4.9 hours, continue aging reaction for a period of time, until the pressure reaches 0MPa. Keep the temperature of the reactor at 110-115°C, feed 5mol (220g) of ethylene oxide, control the pressure below 0.4MPa, finish adding in 2.9 hours, continue the aging reaction for a period of time until the pressure reac...

Embodiment 2～9

[0037] Other settings are the same as in Example 1, the difference is: the type of fatty alcohol, the amount of catalyst, the composite ratio of the catalyst, the reaction temperature, the reaction time, the molar ratio of fatty alcohol to propylene oxide and ethylene oxide is different, the specific proportioning and related The parameters are detailed in Table 1 and Table 2.

[0038] Table 1 The process parameter setting table of embodiment 1~9

[0039] 1. Serial number 2. Types of fatty alcohols 3. Catalyst dosage (wt%) 4. Catalyst composition (barium acetate: stannous oxalate, weight ratio) 5. Molar ratio of fatty alcohol to PO / EO 6. Reaction temperature (°C) 7. Add PO reaction time (h) 8. Add EO reaction time (h) 9. Embodiment 1 10. Cetyl alcohol 11.0.15 12.4：1 13.1：6：5 14.110～115 15.4.9 16.2.9 17. Example 2 18. Octadecanol 19.0.10 20.3：1 21.1：3：8 22.110～115 23.6.0 24.3.5 25. Example 3 26. Tetradecyl Alcohol 27.0.30 ...

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Abstract

The invention discloses a fatty alcohol block polyether with good low-temperature stability and a preparation method thereof, comprising the following steps: mixing the fatty alcohol with a composite catalyst, purging and replacing with nitrogen, and finally removing moisture; reacting propylene again, and aging , to obtain an intermediate product; finally react with ethylene oxide, and age to obtain the final product; the composite catalyst is a mixture of alkaline earth metal catalyst and stannous oxalate; the fatty alcohol block polyether with good low temperature stability is used as Application of surfactants. The product of the invention has the advantages of low-temperature clarification, no stratification and good emulsifying power.

Description

technical field [0001] The invention belongs to the field of organic compound surfactants, and in particular relates to a fatty alcohol block polyether with good low-temperature stability and a preparation method and application thereof. Background technique [0002] Fatty alcohol polyoxyethylene ether is a kind of nonionic surfactant, which has excellent diffusion, penetration, emulsification, washing and wetting properties. However, this type of product has a fatal shortcoming. There are many foams during use, which is not conducive to rinsing and water saving; as an auxiliary index, its pour point also has a great impact on the performance of the product. The pour point of fatty alcohol polyoxyethylene ether Higher, poor fluidity at low temperature, which has a greater impact on use. In the metal processing industry, in order to obtain low-viscosity, low-temperature fluidity, and low-foaming products, a propylene oxide segment is embedded in the middle of the fatty alcoh...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C07C43/11C07C41/03C08G65/28B01F17/42B01F17/52C09K23/42C09K23/52
CPCC07C43/11C08G65/2609C08G65/266C08G2650/58C09K23/00
Inventor高洪军万庆梅金一丰钱建芳陈世明郭增琴
OwnerZHEJIANG HUANGMA TECH