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Method for preparing polyether polyol from high-acid-value waste oil

A technology of polyether polyol and waste oil, which is applied in the field of preparing polyether polyol from waste oil with high acid value, can solve the problems of increased production cost, large loss of water resources, and long synthesis cycle, so as to save production cost and produce The effect of low cost and stable product

Inactive Publication Date: 2020-04-03
ZHEJIANG HUANGMA NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after esterification by this method, 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, which is also a threat to the environment
In addition, the esterification process of this method needs 8-12h, and there are disadvantages of long synthesis cycle and large energy consumption

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A method for preparing polyether polyols by utilizing high acid value waste oils and fats, comprising the following steps:

[0029] S1, ethylene glycol, soybean acidified oil, AlCl 3 Ethylene glycol by mass ratio: soy acidified oil: AlCl 3 =250:500:0.5 was put into a four-necked flask, heated up after nitrogen was put in for 3 times, and esterified and acid-reduced under the condition of 120~130° C. and vacuum degree of -0.08~-0.098MPa for 2 hours;

[0030] S2. After the acid reduction is completed, the reactant is cooled to 70-80° C. and filtered by suction to obtain a reaction precursor;

[0031] S3, put the reaction precursor into the reaction kettle, add the KOH catalyst with a reaction precursor quality of 3.0‰, heat up after 3 times with nitrogen, and when the temperature rises to 110~115°C, the reaction precursor according to the mass ratio: propylene oxide=500: 500 Continuously feed propylene oxide for polymerization reaction, control the pressure below 0.35MP...

Embodiment 2

[0034] A method for preparing polyether polyols by utilizing high acid value waste oils and fats, comprising the following steps:

[0035] S1, triethylene glycol, ricinoleic oil, ZnCl 2 According to the mass ratio triethylene glycol: ricinoleic acid oil: ZnCl 2 =200:500:0.5 was put into a four-necked flask, heated up after nitrogen was set for 3 times, and esterified and acid-reduced for 2.5 hours under the conditions of 120~130°C and vacuum degree of -0.08~-0.098MPa;

[0036]S2. After the acid reduction is completed, the reactant is cooled to 70-80° C. and filtered by suction to obtain a reaction precursor;

[0037] S3, put the reaction precursor into the reaction kettle, add the potassium methylate catalyst with the quality of the reaction precursor 2‰, heat up after 3 times with nitrogen, and when the temperature rises to 110~115°C, the reaction precursor is according to the mass ratio: propylene oxide=500 :750 Continuously feed propylene oxide to carry out polymerization...

Embodiment 3

[0040] A method for preparing polyether polyols by utilizing high acid value waste oils and fats, comprising the following steps:

[0041] S1. Glycerin, rapeseed acidified oil, palmitic acidified oil, TiCl 4 Glycerol: Rapeseed Acid Carbide: Palmitate Carbide: TiCl 4 =200:250:250:1.5 was put into a four-necked flask, heated up after setting nitrogen for 3 times, and esterified and reduced acid for 2.5 hours under the conditions of 120~130°C and vacuum degree of -0.08~-0.098MPa;

[0042] S2. After the acid reduction is completed, the reactant is cooled to 70-80° C. and filtered by suction to obtain a reaction precursor;

[0043] S3, put the reaction precursor into the reaction kettle, add the NaOH catalyst with a reaction precursor quality of 3.5‰, heat up after 3 times with nitrogen, and when the temperature rises to 115~120°C, the reaction precursor according to the mass ratio: propylene oxide=500: 400 Continuously feed propylene oxide for polymerization reaction, control th...

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Abstract

The invention discloses a method for preparing polyether polyol from high-acid-value waste oil, and belongs to the technical field of polyether polyol preparation. The method comprises the following steps: carrying out esterification and deacidification reactions on the waste oil and polyol under the action of a Lewis acid catalyst, cooling a reaction product obtained after deacidification is finished, carrying out suction filtration to obtain a reaction precursor, and recovering the Lewis acid catalyst for reuse; adding a catalyst into the reaction precursor, continuously introducing epoxypropane, carrying out a polymerization reaction, and removing water and small molecules after the reaction is finished to obtain crude waste oil polyether polyol. The preparation method has the advantages of good reduction of foaming, good catalytic effect, great improvement of the yield of the polyether polyol, low production cost, high efficiency, stability in the product, turning of wastes into valuables, energy saving and environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of preparation of polyether polyols, in particular to a method for preparing polyether polyols from waste oils with high acid value. Background technique [0002] Waste oils and fats refer to inedible animal and vegetable oils and fats produced during the production process, and their sources are mainly food processing industry and catering industry. Because of its different raw materials, it can be divided into three categories: (1) frying waste oil; (2) inferior oil and swill oil after separation and treatment by oil-water separator; (3) rotten animal fat. my country produces about 6.25 million tons of waste cooking oil every year, and the amount of waste oil is huge. In the process of frying food with oil, a large amount of water in the food will be lost, resulting in an increase in the water content in the oil, which will cause the oil to be hydrolyzed under high temperature conditions to form free fatt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/28
CPCC08G65/2615C08G65/2648C08G65/2696
Inventor 宿颜彬马定连刘鹏飞唐福伟
Owner ZHEJIANG HUANGMA NEW MATERIALS TECH CO LTD