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Preparation method of low-freezing-point polyether nonionic surfactant

A non-ionic surface, active agent technology, used in chemical instruments and methods, transportation and packaging, dissolution, etc., can solve problems such as high freezing point, limited application scope, etc., to achieve the effect of reducing freezing point and improving fluidity

Inactive Publication Date: 2018-08-28
FUJIAN MEIZHOU BAY CHLOR ALKALI IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional polyether-type nonionic surfactants have a high freezing point, and generally the lowest freezing point is around 20°C, which greatly limits the scope of application in the industrial field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0021] The invention discloses a preparation method of a low freezing point polyether type nonionic surfactant, comprising the following steps:

[0022] Step 1: Put the saturated fatty alcohol compound and basic catalyst into a stainless steel reactor, react at a temperature of 100~115°C for 0.5~2h, replace 3~6 times with nitrogen at 300~400Kpa, and the purity of nitrogen is 99.8%, ensuring the system The oxygen content is less than 0.02%.

[0023] Step 2: Continuously feed the epoxy compound or the mixture of epoxy compounds into the reaction kettle of step 1. At a temperature of 100~180°C and a pressure of 200~500Kpa, a ring-opening polymerization reaction occurs, and the crude polyether is obtained after aging for 2 hours. Type nonionic surfactant polyether polyol, the molecular weight of the obtained polyether polyol is 100~3000, and the hydroxyl value is 20~100mgKOH / g. Wherein, the feeding of the epoxy compound and the mixture of epoxy compounds is carried out in multipl...

Embodiment 1

[0031] Add 220 g of raw materials n-octanol and 10.7 g of sodium methoxide into a 3L stainless steel reaction kettle, replace with nitrogen four times, and control the temperature at 100-110°C for about 1 hour to convert the initiator n-octanol into sodium alkoxide.

[0032] Control the temperature at 105°C-115°C, continuously add 220g of propylene oxide, then control the temperature at 115°C-120°C, and continuously add 2150g of ethylene oxide / propylene oxide (EO / PO) mixture (the mixture contains ethylene oxide EO Accounting for 62.5%), the crude nonionic surfactant polyether polyol was prepared after aging for 2 hours.

[0033] Add 20.6g of 85% phosphoric acid aqueous solution and 130g of deionized water to the crude nonionic surfactant, control the temperature at 85°C-90°C, neutralize for 2 hours; add 1.00g of adsorbent (ADS), control the reaction temperature at 110°C- 120°C, pressure -0.01MPa--0.095MPa, dehydration treatment, dehydration time 5h, sampling analysis moisture ...

Embodiment 2

[0037] Add 296 g of iso-octanol and 14.4 g of sodium methoxide into a 5L stainless steel reactor, and replace with nitrogen four times to convert the initiator iso-octanol into sodium alkoxide.

[0038] Control the temperature at 110°C-130°C, successively add 592g of propylene oxide (PO), 448g of ethylene oxide (EO), 2150g of ethylene oxide / propylene oxide (EO / PO) mixture (the mixture contains ethylene oxide Alkanes accounted for 63%), prepared crude nonionic surfactant after aging for 2h.

[0039] Add 31g of phosphoric acid (85%) and 176g of deionized water to the crude polyether polyol, control the temperature at 85°C-90°C, neutralize for 2 hours; add 1.75g ​​of adsorbent (ADS), control the reaction temperature at 110°C-120°C , pressure -0.01MPa--0.095MPa, dehydration treatment, dehydration time 5h, sampling analysis moisture ≤ 500ppm, filtered to obtain refined polyether type nonionic surfactant polyether polyol.

[0040] The main indicators of the product: the hydroxyl va...

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Abstract

The invention relates to the technical field of chemical polymer synthesis, and discloses a preparation method of a low-freezing-point polyether nonionic surfactant. The method comprises the followingsteps: putting a saturated fatty alcohol compound and a basic catalyst into a reaction kettle, performing nitrogen displacement for 3 to 6 times at 300 to 400Kpa, performing reaction for 0.5 to 2h at100 to 110 DEG C, continuously feeding an epoxy compound or a mixture of the epoxy compound into the reaction kettle, performing ring-opening polymerization at 100 to 180 DEG C and 200 to 500Kpa, forming a crude polyether nonionic surfactant with the molecular weight being 100 to 3000 after curing is performed for 2h, and adding inorganic acid and deionized water into the crude polyether nonionicsurfactant to perform neutral reaction, with the temperature being 80 to 90 DEG C, time being 2 to 3h and pressure being 0 to 500Kpa; then controlling the temperature to be 100 to 130 DEG C and the vacuum pressure to be 0 to minus 95Kpa, and performing dehydration, filtering and crystallization, so as to obtain the polyether nonionic surfactant. The method guarantees the hydrophilicity and the lipophilicity of the polyether nonionic surfactant through the adoption of a multistage epoxide polymerization technology, meanwhile further reduces the freezing point, and ensures that a product has good flowability.

Description

technical field [0001] The invention relates to the technical field of chemical polymer synthesis, in particular to a preparation method of a low freezing point polyether type nonionic surfactant. Background technique [0002] Due to the non-ionization characteristics of non-ionic surfactants in water, it is superior to ionic surfactants in some aspects, such as better solubility in water and organic solvents, and high stability in solutions , not easily affected by strong electrolyte inorganic salts and acids and bases. Because of its good compatibility with other types of surfactants, it can often be mixed and compounded well. Compared with anionic surfactants, it has higher emulsifying ability, has excellent wetting and washing functions, has certain hard water resistance and can be used together with other ionic surfactants. It is an indispensable ingredient, and non-ionic surfactants can change the properties of gas-liquid, liquid-liquid and liquid-solid interfaces, m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28B01F17/52B01F17/42C09K23/42C09K23/52
CPCC08G65/2609C09K23/00
Inventor 张立著付晓燕连颖媛
Owner FUJIAN MEIZHOU BAY CHLOR ALKALI IND