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Method for preparing hydrophilic polyether polyol by utilization of recycled solar silicon chip cutting liquid

A technology of solar silicon wafer and polyether polyol, which is applied in the field of polyester polyol synthesis, can solve the problems of increased processing cost, high energy consumption, and high cost of raw materials for finished products of diethylene glycol

Active Publication Date: 2014-04-09
JIANGSU YINGTIAN CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main liquid component of most solar silicon wafer cutting fluids is glycol. With the continuous development of the solar photovoltaic industry, glycol waste liquid will continue to be produced. However, careful distillation and purification work not only consumes a lot of energy, but also And it will greatly increase the processing cost
[0006] The existing polyether polyols for hard foam mainly use sucrose, sorbitol, glycerin, and diethylene glycol as mixing initiators in two or more, but the raw material cost of diethylene glycol is relatively high

Method used

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  • Method for preparing hydrophilic polyether polyol by utilization of recycled solar silicon chip cutting liquid

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Put 2000g of recovered solar silicon chip cutting fluid (hydroxyl value 500mg KOH / g) and 3000g of sucrose into the polyether reactor, and replace it with nitrogen three times; Put 6200g of propylene oxide into the kettle, keep the pressure of the reactor at 0.2MPa, slowly raise the temperature to 90°C, react for 1h, continue to heat up to 105°C, and keep it warm for 4h; when the pressure drops below -0.04MPa, vacuumize For 1.5 hours, the pressure and temperature were maintained at -0.095MPa and 105°C respectively; cooled to below 85°C and filtered out to obtain viscous light yellow-brown transparent polyether polyol for hard foam. (Hydroxyl value 436mg KOH / g, moisture 0.04%).

Embodiment 2

[0019] Put 1600g of recycled solar wafer cutting fluid (hydroxyl value 600mg KOH / g) and 3100g of sucrose into the polyether reactor, and replace it with nitrogen three times; Put 6550g of propylene oxide into the kettle, keep the pressure of the reactor at 0.3MPa, slowly raise the temperature to 100°C, react for 0.5h, continue to raise the temperature to 110°C, and keep it warm for 3h; when the pressure drops below -0.04MPa, pump Vacuum for 0.5h, maintain the pressure and temperature at -0.095MPa and 110°C respectively; cool to below 85°C and filter the material to obtain viscous light yellow-brown transparent polyether polyol for hard foam. (Hydroxyl value 441mgKOH / g, moisture 0.03%).

Embodiment 3

[0021] Put 1000g of recycled solar wafer cutting fluid (hydroxyl value 750mg KOH / g) and 2000g of sucrose into the polyether reactor, and replace it with nitrogen three times; Put 4500g of propylene oxide into the kettle, keep the pressure of the reactor at 0.4MPa, slowly raise the temperature to 95°C, react for 0.5h, continue to raise the temperature to 105°C, and keep it warm for 3.5h; when the pressure drops below -0.04MPa, Vacuumize for 1 hour, maintain the pressure and temperature at -0.095MPa and 108°C respectively; cool to below 85°C and filter the material to obtain a viscous light yellow-brown transparent polyether polyol for hard foam. (Hydroxyl value 434mg KOH / g, moisture 0.03%).

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Abstract

The invention discloses a method for preparing hydrophilic polyether polyol by utilization of recycled solar silicon chip cutting liquid. The method comprises the following steps: recycled solar silicon chip cutting liquid and cane sugar are added in a polyether reaction vessel, and nitrogen displacement is carried out; catalysts are added, epoxypropane is added, the temperature is risen to 90-100 DEG C slowly, the reaction is for 0.5-1h, the temperature is risen to 105-110 DEG C continuously, and heat insulation is carried out for 3-4h; when the pressure is lowered below minus 0.04 MPa, vacuum pumping is carried out for 0.5-1.5h, the mixture is cooled below 85 DEG C, filter pressing and material discharging are performed, and polyether polyol used for hard foam is obtained. Recycled solar silicon chip cutting liquid with a relatively low price and a relatively high molecular weight and cane sugar are employed as mixed starting agents, the dosage of epoxypropane with a high price can be saved, and therefore the product has market competition advantages.

Description

technical field [0001] The invention relates to the field of synthesis of polyester polyols, in particular to a method for preparing polyether polyols by utilizing recycled solar silicon chip cutting fluid. Background technique [0002] Rigid polyurethane foam is a very important polyurethane synthetic material. It has the characteristics of light weight, high specific strength and low thermal conductivity. It has a wide range of applications and its market demand is increasing year by year. Polyether polyol is one of the main raw materials in the production of rigid polyurethane foam. [0003] Chinese patent 201010581676.6 discloses that under anaerobic conditions and inert gas protection, under the action of a weak amine catalyst, polyols with a functionality of 3 to 8 and tetrabromophthalic anhydride diol are used as composite initiators, and epoxy compounds Carry out ring-opening polymerization to prepare a variety of polyether polyols for rigid foam with different hydr...

Claims

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Application Information

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IPC IPC(8): C08G65/28
Inventor 杨水清罗伟蒋文俊陈玉龙王荣华
Owner JIANGSU YINGTIAN CHEM