Method for preparing polyurethane polyether polyol by waste oil

Abstract

The invention discloses a method for preparing polyurethane polyether polyol by waste oil. In the method, the polyurethane polyether polyol is prepared through the reaction of co-initiators and oxyalkylene under the effect of a basic catalyst. Firstly, the waste oil is heated to raise the temperature, and is vacuumized for 3-6 hours when the temperature is controlled between 110 and 130 DEG C, then an adsorbent is added, the mixture is stirred for 1-3 hours, impurities are adsorbed, and refined waste oil is obtained after filtration; and then the waste oil or the mixture of the waste oil and vegetable oil, and polyol or amine compound or the mixture of the polyol and the amine compound are used as the co-initiators to be added into a reactor, a catalyst and the oxyalkylene are added, and in the presence of the catalyst, the co-initiators and the oxyalkylene react at a certain temperature under certain pressure to prepare the polyether polyol. The polyether polyol preparing method disclosed by the invention has the advantages that raw materials are cheap and easy to get, the product has stable quality and good use performance, and the degradability of the prepared polyurethane foam plastics is good.

Description

technical field

[0001] The invention relates to a method for preparing organic polymer compounds, in particular to a method for preparing polyhydroxy polyethers by using olefin oxides, polyol compounds or amine compounds as raw materials, specifically a method for preparing polyurethane from waste oil Polyether polyol method. Background technique

[0002] Polyether polyol is an important raw material of polyurethane materials. Its preparation method is mostly under the action of certain pressure, temperature and catalyst, from ethylene glycol, propylene glycol, diethylene glycol, glycerol, ethylenediamine, triethanolamine, three Isopropanolamine, toluenediamine, etc., and polyols (such as sucrose, sorbitol, etc.) are used as initiators, and they are prepared by reacting with oxyalkylenes. This type of method consumes more oxyolefins, which are produced by the petrochemical industry. Under the situation of increasingly tight oil resources, reducing the consumption of such ol...

Examples

example 1

[0020] With waste oil 20%, sucrose 50%, diethylene glycol 20%, glycerol 10% as co-initiator, catalyst potassium hydroxide is 0.24% of co-initiator total amount, add in the reactor together, heat up When the temperature reaches 95°C, start to add propylene oxide. The amount of propylene oxide added is 1 times the total weight of the co-initiator. Due to the exothermic reaction, the temperature should not exceed 135°C, and the pressure should be controlled below 0.5MPa. After adding propylene oxide, keep the reaction temperature for 2 hours to fully proceed the reaction, then degas for 20 minutes, and obtain waste oil-sucrose polyoxypropylene ether after refining. The consumption of propylene oxide in this method is about 10% lower than the conventional method for producing polyoxypropylene ethers of the same type of sucrose.

example 2

[0022] Use 30% waste oil, 40% sorbitol, 20% propylene glycol, 10% ethylenediamine as a co-initiator, dimethylamine (40% aqueous solution) as a catalyst, and the amount of the catalyst is 5% of the total co-initiator , put it into the reactor, heat up, and start adding propylene oxide when the temperature reaches 100°C. The amount of propylene oxide added is 3 times the total weight of the co-initiator. Due to the exothermic reaction, the temperature should not exceed 155°C, and the pressure should be controlled at 0.5 Below MPa. After adding propylene oxide, keep the reaction temperature for 1.5 hours to fully proceed the reaction, and then degas for 3 hours to obtain waste oil-sorbitol polyoxypropylene ether. The consumption of propylene oxide in this method is about 10% lower than the conventional method for producing similar sorbitol polyoxypropylene ethers.

example 3

[0024] 40% of waste oil, 40% of sucrose, 10% of pentaerythritol, 10% of triethanolamine are used as a co-initiator, and sodium hydroxide is used as a catalyst. The amount of the catalyst is 10% of the total amount of the co-initiator. Propylene oxide, the amount of propylene oxide added is 0.5 times the total weight of the co-initiator, the pressure in the heating process is controlled below 0.5 MPa, and when the temperature reaches 110 ° C, propylene oxide that is 3 times the total weight of the co-initiator is started. Exothermic, the control temperature shall not exceed 135°C, and the pressure shall be controlled below 0.6MPa. After adding propylene oxide, keep the reaction temperature for 2 hours to fully proceed the reaction, then degas for 20 minutes, and obtain waste oil-sucrose polyoxypropylene ether after refining. The consumption of propylene oxide in this method is about 23% lower than that of the conventional method for producing similar sucrose polyoxypropylene et...

technical field

[0001] The invention relates to a method for preparing organic polymer compounds, in particular to a method for preparing polyhydroxy polyethers by using olefin oxides, polyol compounds or amine compounds as raw materials, specifically a method for preparing polyurethane from waste oil Polyether polyol method. Background technique

[0002] Polyether polyol is an important raw material of polyurethane materials. Its preparation method is mostly under the action of certain pressure, temperature and catalyst, from ethylene glycol, propylene glycol, diethylene glycol, glycerol, ethylenediamine, triethanolamine, three Isopropanolamine, toluenediamine, etc., and polyols (such as sucrose, sorbitol, etc.) are used as initiators, and they are prepared by reacting with oxyalkylenes. This type of method consumes more oxyolefins, which are produced by the petrochemical industry. Under the situation of increasingly tight oil resources, reducing the consumption of such ol...

Examples

example 1

[0020] With waste oil 20%, sucrose 50%, diethylene glycol 20%, glycerol 10% as co-initiator, catalyst potassium hydroxide is 0.24% of co-initiator total amount, add in the reactor together, heat up When the temperature reaches 95°C, start to add propylene oxide. The amount of propylene oxide added is 1 times the total weight of the co-initiator. Due to the exothermic reaction, the temperature should not exceed 135°C, and the pressure should be controlled below 0.5MPa. After adding propylene oxide, keep the reaction temperature for 2 hours to fully proceed the reaction, then degas for 20 minutes, and obtain waste oil-sucrose polyoxypropylene ether after refining. The consumption of propylene oxide in this method is about 10% lower than the conventional method for producing polyoxypropylene ethers of the same type of sucrose.

example 2

[0022] Use 30% waste oil, 40% sorbitol, 20% propylene glycol, 10% ethylenediamine as a co-initiator, dimethylamine (40% aqueous solution) as a catalyst, and the amount of the catalyst is 5% of the total co-initiator , put it into the reactor, heat up, and start adding propylene oxide when the temperature reaches 100°C. The amount of propylene oxide added is 3 times the total weight of the co-initiator. Due to the exothermic reaction, the temperature should not exceed 155°C, and the pressure should be controlled at 0.5 Below MPa. After adding propylene oxide, keep the reaction temperature for 1.5 hours to fully proceed the reaction, and then degas for 3 hours to obtain waste oil-sorbitol polyoxypropylene ether. The consumption of propylene oxide in this method is about 10% lower than the conventional method for producing similar sorbitol polyoxypropylene ethers.

example 3

[0024] 40% of waste oil, 40% of sucrose, 10% of pentaerythritol, 10% of triethanolamine are used as a co-initiator, and sodium hydroxide is used as a catalyst. The amount of the catalyst is 10% of the total amount of the co-initiator. Propylene oxide, the amount of propylene oxide added is 0.5 times the total weight of the co-initiator, the pressure in the heating process is controlled below 0.5 MPa, and when the temperature reaches 110 ° C, propylene oxide that is 3 times the total weight of the co-initiator is started. Exothermic, the control temperature shall not exceed 135°C, and the pressure shall be controlled below 0.6MPa. After adding propylene oxide, keep the reaction temperature for 2 hours to fully proceed the reaction, then degas for 20 minutes, and obtain waste oil-sucrose polyoxypropylene ether after refining. The consumption of propylene oxide in this method is about 23% lower than that of the conventional method for producing similar sucrose polyoxypropylene et...