Method for preparing high-molecular-weight polyether polyol from waste grease

A technology of polyether polyol and waste oil, which is applied in the field of preparing high molecular weight polyether polyol from waste oil, can solve the problems of increased production cost, large loss of water resources, low molecular weight, etc., and achieves production cost saving, low production cost, The effect of high molecular weight

Pending Publication Date: 2022-04-29
ZHEJIANG HUANGMA TECH +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polyether polyol prepared by this method also has the disadvantage of low molecular weight (about 1500), and after esterification, a large amount of water needs to be used to wash away the acid catalyst, resulting in a large loss of water resources, and the treatment of waste acid water will further increase production costs. also a threat to the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A kind of method utilizing waste grease to prepare high molecular weight polyether polyol, it comprises the following steps:

[0035] S1, propylene glycol, soybean oil, ZnCl 2 Propylene Glycol:Soybean Oil:ZnCl by Mass Ratio 2 =100:500:0.05 Put it into the reaction kettle, put nitrogen 3 times, then raise the temperature, and esterify for 1.5h under the conditions of 150°C and vacuum degree of -0.08~-0.098MPa;

[0036] S2. After the esterification is completed, the temperature of the reactant is reduced to 70-80° C. and filtered by suction to obtain a reaction precursor;

[0037] S3. Put the reaction precursor into the cleaned reaction kettle, add the DMC catalyst with a mass of 0.06‰ of the reaction precursor, set the temperature for 3 times and then raise the temperature. When the temperature rises to 140°C, the reaction precursor is according to the mass ratio: EO:PO= 500:750:750 Continuously feed the EO / PO mixture to carry out the polymerization reaction. The press...

Embodiment 2

[0040] A kind of method utilizing waste grease to prepare high molecular weight polyether polyol, it comprises the following steps:

[0041] S1, glycerol, palm oil, AlCl 3 By mass ratio glycerol: palm oil: AlCl 3 =100:800:0.1 Put it into the reaction kettle, put nitrogen 3 times, then raise the temperature, and esterify for 1.0h under the conditions of 180°C and vacuum degree -0.08~-0.098MPa;

[0042] S2. After the esterification is completed, the temperature of the reactant is reduced to 70-80° C. and filtered by suction to obtain a reaction precursor;

[0043]S3. Put the reaction precursor into the cleaned reaction kettle, add the MMC catalyst with a mass of 0.08‰ of the reaction precursor, set the temperature for 3 times and then raise the temperature. When the temperature rises to 143°C, the reaction precursor is according to the mass ratio: EO:PO= 300:600:1200 Continuously feed the EO / PO mixture to carry out the polymerization reaction. The pressure is controlled below ...

Embodiment 3

[0046] A kind of method utilizing waste grease to prepare high molecular weight polyether polyol, it comprises the following steps:

[0047] S1. Put ethylene glycol, castor oil, and ZnO into the reaction kettle according to the mass ratio of ethylene glycol: castor oil: ZnO=100:600:0.3, set the temperature in nitrogen for 3 times, and set the temperature at 160°C and vacuum degree -0.08~- Esterification under the condition of 0.098MPa for 1.0h;

[0048] S2. After the esterification is completed, the temperature of the reactant is reduced to 70-80° C. and filtered by suction to obtain a reaction precursor;

[0049] S3. Put the reaction precursor into a cleaned reaction kettle, add a boron trifluoride ether catalyst with a mass of 1.5‰ of the reaction precursor, and heat up after placing nitrogen for 3 times. When the temperature rises to 142° C., react the precursor according to the mass ratio: EO:PO=300:300:700 Continuously feed the EO / PO mixture to carry out the polymerizati...

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Abstract

The invention provides a method for preparing high-molecular-weight polyether polyol from waste grease. The method comprises the following steps: S1, carrying out esterification reaction on the waste grease and polyol in the presence of a Lewis acid catalyst; s2, after the reaction is finished, cooling to 70-80 DEG C, carrying out suction filtration to obtain a reaction precursor, recovering the Lewis acid catalyst, and reusing the Lewis acid catalyst; and S3, adding a catalyst into the reaction precursor filtered in the step S2, continuously introducing an EO / PO mixture at the reaction temperature of 140-145 DEG C to carry out polymerization reaction, curing for 10 minutes after epoxy is introduced, and then cooling and removing water and small molecules to obtain the waste grease high molecular weight polyether. The polyether prepared by the method has the advantages of high molecular weight, narrow distribution, high content of effective components and the like.

Description

technical field [0001] The invention relates to the technical field of polyether polyol preparation, in particular to a method for preparing high molecular weight polyether polyol from waste oil. Background technique [0002] At present, polyether polyols are mainly prepared from petroleum non-renewable resources and low-molecular alcohols. The production process is complicated, and it is far from meeting the actual demand of polyether polyols in the market. The use of waste oil and other renewable resources to prepare polyether polyols is a good solution to the shortage of petroleum, and the prepared polyether polyols can be used as defoamers in textile auxiliaries and papermaking auxiliaries, in lubricating oils, lubricants, etc. Used as an additive in grease, as a grinding aid in paint, ink, dye, etc. Another advantage of waste oil polyether is that its structure contains ester bonds, has good compatibility with foaming agents and additives, and can be stored for a lon...

Claims

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Application Information

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IPC IPC(8): C08G65/26
CPCC08G65/2615C08G65/2663C08G65/2642C08G65/2654C08G65/2675C08G65/2696Y02P20/584
Inventor 宿颜彬金一丰马定连高洪军
Owner ZHEJIANG HUANGMA TECH
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