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A kind of cationic surfactant prepared by using waste polyester and its preparation method

A surfactant and waste polyester technology, applied in chemical instruments and methods, organic chemistry, dissolution, etc., can solve the problems of narrow product application fields, low yield of polyester alcoholysis, etc., and achieve high surface activity and sterilization/ Antibacterial ability, low cost of raw materials, and simple production process

Active Publication Date: 2020-06-23
SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these studies still have the problems of low polyester alcoholysis yield and narrow product application fields, and this has also become a bottleneck restricting the resource utilization of waste polyester

Method used

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  • A kind of cationic surfactant prepared by using waste polyester and its preparation method
  • A kind of cationic surfactant prepared by using waste polyester and its preparation method
  • A kind of cationic surfactant prepared by using waste polyester and its preparation method

Examples

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Effect test

example 1

[0023] (1) Alcoholysis of waste polyester: First, wash the waste polyester with deionized water at 60°C, then break it into pieces with a length of 2mm, and then dry it at 90°C for 2 hours to remove water and volatiles. Then 500g of waste polyester chips, 1250g of ethylene glycol and 10g of stannous chloride and manganese acetate mixed catalyst (mass ratio of stannous chloride and manganese acetate is 20:80) were added in turn to the connected thermometer, stirrer and condensing In the reactor of the tube, the temperature was raised to 198° C. under the condition of nitrogen protection, and the reaction was carried out for 1 h. When approaching the end of the reaction, take a small amount of reactants every 10 minutes and put them in a 1:1 mixed solution with a volume ratio of xylene and n-octane. If the mixed solution is clear and there is no suspended matter, stop the reaction. After cooling, filter, add deionized water to recrystallize three times, put the product in a vacu...

example 2

[0036] (1) Alcoholysis of waste polyester: First, wash the waste polyester with deionized water at 60°C, then break it into pieces with a length of 2mm, and then dry it at 90°C for 2 hours to remove water and volatiles. Then 500g of waste polyester chips, 1250g of ethylene glycol and 10g of stannous chloride and manganese acetate mixed catalyst (mass ratio of stannous chloride and manganese acetate is 40:60) were added in turn to the connected thermometer, stirrer and condensing In the reactor in the tube, the temperature was raised to 198° C. under nitrogen protection, and the reaction was carried out for 1 h. When approaching the end of the reaction, take a small amount of reactants every 10 minutes and put them in a 1:1 mixed solution with a volume ratio of xylene and n-octane. If the mixed solution is clear and there is no suspended matter, stop the reaction. After cooling, filter, add deionized water to recrystallize three times, put the product in a vacuum oven at 60°C, ...

example 3

[0040] (1) Alcoholysis of waste polyester: First, wash the waste polyester with deionized water at 60°C, then break it into pieces with a length of 2mm, and then dry it at 80°C for 3 hours to remove water and volatiles. Then 500g of waste polyester chips, 1250g of ethylene glycol and 15g of stannous chloride and manganese acetate mixed catalyst (mass ratio of stannous chloride and manganese acetate is 20:80) were added in turn to the connected thermometer, stirrer and condensing In the reactor in the tube, the temperature was raised to 198° C. under nitrogen protection, and the reaction was carried out for 1 h. When approaching the end of the reaction, take a small amount of reactants every 10 minutes and put them in a 1:1 mixed solution with a volume ratio of xylene and n-octane. If the mixed solution is clear and there is no suspended matter, stop the reaction. After cooling, filter, add deionized water to recrystallize three times, put the product in a vacuum oven at 60°C, ...

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Abstract

A cationic surfactant prepared by using waste polyester and a preparation method thereof, relating to an active agent and a preparation method thereof. The invention uses a mixed catalyst to realize efficient alcoholysis of waste polyester. A novel cationic surfactant with high activity and high bactericidal properties was prepared by morpholine-based reaction. Including the alcoholysis of discarded polyester, the preparation of halogenated intermediates, and the preparation of cationic surfactants: put BHEX and long-chain alkylmorpholine (RNA) with a molar ratio of 1:2‑1:2.5 into a container containing excess acetone In the reactor, heated to 50-57°C, reacted for 1-5h; the product was distilled under reduced pressure at 25-30°C to remove acetone to obtain the product. The product of the invention has stable performance, high yield, easy industrial production, fully realizes the effective recovery and recycling of waste polyester fiber, and has broad application value.

Description

technical field [0001] The invention relates to an active agent and a preparation method thereof, in particular to a cationic surfactant prepared from waste polyester and a preparation method thereof. Background technique [0002] Ethylene terephthalate (referred to as polyester) is a general-purpose plastic with excellent physical and chemical properties. It is widely used in various fields such as textiles, packaging and engineering plastics. The more common ones are drinking water packaging bottles, Polyester fabrics, etc. are made of it. With the increase of polyester consumption, China alone can produce 4 million tons of waste polyester materials every year. Although it is non-toxic, it cannot be degraded naturally, and long-term accumulation will pose a huge potential threat to the natural environment. Therefore, the recycling of waste polyester has become one of the important technologies for the sustainable development of the new polyester industry. There are usual...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D295/088C09K23/32C09K23/18
CPCC07D295/088C09K23/00
Inventor 马驰桑寄人秦刚刘世伟
Owner SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
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