A kind of method utilizing recovery alcohol and eo to prepare hydrophilic polyether polyol

A technology for polyether polyols and alcohol recovery, which is applied in the field of preparation of polyether polyols for powder puffs, can solve the problems of increased processing costs, high processing costs, and low purity of polyols, and achieves improved heating efficiency and low production costs Effect

Active Publication Date: 2016-03-02
JIANGSU YINGTIAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low purity of the recovered polyols, its sales and application are also limited to a certain extent. However, fine purification will greatly increase the processing cost, which not only consumes a lot of energy, but also costs a lot.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Put 50Kg of recovered solar photovoltaic cutting fluid (hydroxyl value 500mgKOH / g), 12g of potassium hydroxide, etc. into the reactor at one time;

[0024] 2) Use high temperature and high pressure steam heating method to raise the temperature to 100°C;

[0025] 3) Pass into N 2 As a protective gas and kept uninterrupted, slowly add 74.4kg of propylene oxide dropwise, control the pressure of the kettle at 0.2-0.3Mpa, and the temperature of the kettle at 115°C, stop the reaction after the hydroxyl value of the product is qualified, and obtain the crude product;

[0026] 4) Transfer the crude product to the refining kettle, add phosphoric acid and refining agent to produce solid precipitate, filter to obtain the refined product;

[0027] 5) Heat the refined product to 120°C, vacuumize to -0.10Mpa for vacuum dehydration, stop vacuuming after the moisture, pH value and other indicators are qualified, cool down and unload, and then obtain polyether polyol for puffs (hydr...

Embodiment 2

[0029] 1) Put 68Kg of recovered solar photovoltaic cutting fluid (hydroxyl value 598mgKOH / g), 12g of potassium hydroxide, etc. into the reactor at one time;

[0030] 2) Use high temperature and high pressure steam heating method to raise the temperature to 100°C;

[0031] 3) Pass into N 2 As a protective gas and kept uninterrupted, slowly add 60.42kg of propylene oxide dropwise, control the pressure of the kettle at 0.2-0.3Mpa, and the temperature of the kettle at 115°C, stop the reaction after the hydroxyl value of the product is qualified, and obtain the crude product;

[0032] 4) Transfer the crude product to the refining kettle, add phosphoric acid and refining agent to produce solid precipitate, filter to obtain the refined product;

[0033] 5) Heat the refined product to 120°C, vacuumize to -0.10Mpa for vacuum dehydration, stop vacuuming after the moisture, pH value and other indicators are qualified, cool down and unload, and then obtain polyether polyol for puffs (hyd...

Embodiment 3

[0035] 1) Put 80Kg of recovered solar photovoltaic cutting fluid (hydroxyl value 750mgKOH / g), 18.7g of potassium hydroxide, etc. into the reactor at one time;

[0036] 2) Use high temperature and high pressure steam heating method to raise the temperature to 100°C;

[0037] 3) Pass into N 2 Use as protective gas and keep it uninterrupted, slowly add 107kg of propylene oxide dropwise, control the pressure of the kettle at 0.2-0.3Mpa, and the temperature of the kettle at 115°C, stop the reaction after the hydroxyl value of the product is qualified, and obtain the crude product;

[0038] 4) Transfer the crude product to the refining kettle, add phosphoric acid and refining agent to produce solid precipitate, filter to obtain the refined product;

[0039] 5) Heat the refined product to 120°C, vacuumize to -0.10Mpa for vacuum dehydration, stop vacuuming after the moisture, pH value and other indicators are qualified, cool down and unload, and then obtain polyether polyol for puffs...

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Abstract

The invention discloses a method for preparing hydrophilic polyether polyol by utilization of recycled alcohols and EO. The method comprises the following steps: first, low-molecular recycled alcohols, catalysts and the like are added in a reactor, and the temperature is risen to 100-110 DEG C; second, N2 is introduced and epoxypropane is dropwise added slowly, the reaction temperature is kept at 110-120 DEG C, when the hydroxyl value accords with the target hydroxyl value, the reaction is stopped, and a crude product is obtained; third, the crude product is transferred to a refining kettle, phosphoric acid and refining agents are added, solid precipitate is generated under action of the catalysts, the precipitate is filtered, and a refined product is obtained; fourth, the refined product is heated to 120 DEG C, after vacuum dehydration, cooling and material discharging are performed. The hydrophilia of the polyether polyol is utilized fully, and a powder puff can lock water and preserve moisture effectively. Recycled low-molecular polyhydric alcohols are employed as raw materials, the production cost is low, environmental protection low energy consumption recycle of waste alcohols can be achieved.

Description

technical field [0001] The invention relates to a method for preparing polyether polyol for powder puffs, in particular to a method for preparing hydrophilic polyether polyol by using recovered alcohol and EO. Background technique [0002] Polyether polyol is one of the important raw materials for the synthesis of polyurethane resin. It is formed by ring-opening polymerization with low-molecular polyol, polyamine or active hydrogen compound under the action of a catalyst with low molecular weight polyol, polyamine or active hydrogen compound. Polyurethane soft foam synthesized from polyether polyol has low density, good elastic recovery, sound absorption, breathability, heat preservation and other properties. Polyurethane soft foam is widely used in cushion materials, sound insulation materials, shockproof materials, packaging materials and fabric composite materials, etc. [0003] Polyether polyols are generally transparent viscous liquids, non-volatile, and the color is g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G65/28C08G18/48
Inventor 杨水清罗伟蒋文俊陈玉龙王荣华
Owner JIANGSU YINGTIAN CHEM
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