Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of method for preparing polyether polyol

A technology of polyether polyol and polymerization reaction, which is applied in the field of petrochemical industry, 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: 2018-05-18
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

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.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The present invention proposes a method for preparing polyether polyols, using the reaction device and process flow mentioned in CN201210563211.7, using the mixture of heteropolyacid compounds disclosed in CN200610134942.4 as a catalyst, and adding a polymerization catalyst and Initiator, under the condition of 40~100℃ and 0.5~3Mpa, it catalyzes the epoxidation of propylene to directly produce polyether polyol. On the basis of the existing process flow, it can be produced simply by introducing a small amount of polymerization catalyst and initiator The polyether polyol does not need to be neutralized, greatly reduces the cost, simplifies the reaction process, and has practical application prospects.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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