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Method for preparing polyether polyol

A polyether polyol and polymerization reaction technology, applied in the petrochemical field, can solve the problems of large solid waste, high price and high cost, and achieve the effect of reducing cost and simplifying the reaction process

Active Publication Date: 2016-06-29
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is well known that after the polymerization reaction the alkali metals must be removed from the polymer product. Known methods are: addition of concentrated aqueous acid solution, which requires passing through a filter to remove salt crystals; use of magnesium silicate adsorbent, which is costly and Generates a lot of solid waste; using ion exchangers, the process requires the introduction of additional solvents and is expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Using the reaction device mentioned in CN201210563211.7, the solvent in the hydrogen peroxide dehydration tower is a 1:1 equivolume mixture of toluene and trioctyl phosphate, and the feed flow is 5.0kg / h, and the 35% hydrogen peroxide feed flow is 2.0kg / h, The catalyst feed rate was 0.4 kg / h. The process conditions of the hydrogen peroxide dehydration tower are as follows: the temperature at the bottom of the tower is 45°C, the condensation temperature at the top of the tower is -5°C, and the pressure is 1000Pa. The top of the tower passes through the oil-water separator V1 to recover toluene, and the recovery rate of toluene is 99.9%.

[0048] The obtained reaction liquid is transported to the continuous tank reactor at 6.0kg / h and propylene at 0.5kg / h. The reaction conditions of the continuous tank reactor are as follows: the reaction temperature is 85°C, the reaction pressure is 4.25Mpa, and the reaction space velocity is 4h -1 . After the reaction, the materials pa...

Embodiment 2

[0058] The specific method is the same as in Example 1, pumping 50 g of diethylene glycol mixed at 50° C., and 0.003 g of sodium hydroxide. The results of different reaction temperatures are shown in Table 2.

[0059] Table 2

[0060] temperature reflex

Embodiment 3

[0062] The specific method is the same as in Example 1, pumping 100 g of sorbitol mixed at 70° C., 0.002 g of sodium hydroxide, and the rear reaction tower bottom temperature is 90° C., the PPG yield is 89%, and the pH value after the reaction is 6.1.

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PUM

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Abstract

The invention provides a method for preparing polyether polyol. The method comprises the following steps: using a reaction device and a technological process which are referred in a patent with the number of CN201210563211.7; taking a mixture of heteropoly acid compounds disclosed in a patent with the number of CN200610134942.4 as a catalyst; adding a polymerization reaction catalyst and an initiator; and catalyzing propylene epoxidation to directly generate the polyether polyol under the conditions that the temperature is 40-100 DEG C and the pressure is 0.5-3 MPa. On the basis of the existing technological process, a small amount of the polymerization reaction catalyst and the initiator are introduced simply to generate the polyether polyol, neutralization reaction is not required, cost is greatly reduced, a reaction process is simplified, and the actual application prospect is high.

Description

technical field [0001] The invention belongs to the field of petrochemical industry, and mainly relates to a method for preparing polyether polyol, in particular to a method for preparing polyether polyol by using a reaction control phase transfer catalyst to catalyze propylene. Background technique [0002] Polyether polyols are mostly used in the field of polyurethane polymer materials. In addition, they are also used in the production of foam stabilizers, paper industry defoamers, original demulsifiers, high-efficiency low-foam detergents, lubricants, quenching agents, latex foaming agents, Rubber lubricants and surfactants and many other fields. Polyether polyols can generally be divided into four categories, among which polyoxypropylene polyols (PPG), which use polyols or organic amines as initiators, polymerize with propylene oxide or react with propylene oxide, ethylene oxide, etc. Obtained by copolymerization, PPG is currently the main product series of polyether po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28C08G18/48
CPCY02P20/582
Inventor 高爽吕迎张毅张恒耘王连月
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI