Low-temperature degrading method of halogenous plastic

A plastic and low-temperature technology, applied in the degradation of halogen-containing plastics, low-temperature degradation of halogen-containing plastics, can solve the problems of high reaction temperature, waste liquid, high energy consumption, etc., achieve great economic value, reduce energy consumption, and avoid equipment The effect of corrosion

Active Publication Date: 2019-03-08
ZHONGBEI UNIV
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Problems solved by technology

[0005] In order to solve the common problems of high reaction temperature, high waste liquid, high energy consumption, and harsh reaction equipment and conditions in the treatment process of halogen-containing plastics in the prior art, the present invention discloses a low-temperature degradation method for halogen-containing plastics. Use an initiator to trigger the reaction of active metal powder and halogenated hydrocarbon solvent, make the metal become active metal and react with halogen-containing plastics at 43~100°C, capture the halogen in halogen-containing plastics and degrade the plastics

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Examples

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Embodiment 1

[0034] A low-temperature degradation method for halogen-containing plastics. Put 1.5g of PVC, 1.0g of aluminum powder, 0.05g of aluminum trichloride, 0.05g of iodine, and 10g of carbon tetrachloride into a three-necked flask containing magnetons, and place them at 58°C After the reaction, the solution was purple-red (the color of iodine dissolved in carbon tetrachloride) at the beginning of the reaction, and after 10 minutes, the solution turned purple-black with a small amount of white smoke; Larger and more (violent reaction) and the solution turns into pure black; after 31 minutes, the reaction solution is viscous; and because of the condensing device, only the gas with a relatively low boiling point can be discharged; the gas discharged when the hydrogen is not passed can make the Acidic potassium permanganate fades, and the gas discharged after passing hydrogen gas can make silver nitrate form white precipitate, which will release a large amount of heat in an instant after...

Embodiment 2

[0050] A low-temperature degradation method for halogen-containing plastics. Put 1.5g of PVC, 1.0g of aluminum powder, 0.025g of aluminum trichloride, 0.025g of iodine, and 10g of bromoethane into a three-necked flask containing magnets, and put them under the condition of 58°C reaction, the solution was orange at the beginning of the reaction, and there were bubbles, which disappeared after 30s; after 19min, the PVC in the bottle swelled, and the surface formed a solid, and the color was brown; after 25min, the reactant in the bottle turned into pure black; 41min When the reaction is finished, the gas discharged when the hydrogen is not passed can discolor the acidic potassium permanganate; the gas discharged after the hydrogen is passed cannot cause the silver nitrate to form a white precipitate; as the distillation progresses, there are yellow solids on the wall of the three-necked flask, and the inside of the bottle There is a large amount of white smoke, and a distillate f...

Embodiment 3

[0054] A low-temperature degradation method for halogen-containing plastics. Put 1.5g PVC, 1.0g aluminum powder, 0.035g aluminum trichloride, 0.035g iodine, 7g bromoethane and 3g carbon tetrachloride into a three-necked flask containing magnetons , reacted at 58°C, the solution was pink-purple at the beginning of the reaction; after 7 minutes, the bottle began to bubble and the color became darker; after 16 minutes, the color turned into pure black with a small amount of white smoke. 48min reaction ended. And because there is a condensing device, only the gas with a relatively low boiling point can be discharged. The gas discharged when hydrogen is not passed can discolor the acidic potassium permanganate. The gas discharged after passing hydrogen can make silver nitrate form white precipitate. As the distillation progressed, there were yellow solids on the wall of the three-neck flask, and there was a lot of white smoke in the bottle. At 70 ° C, a fraction flowed out, and t...

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Abstract

The invention discloses a low-temperature degrading method of halogenous plastic. According to the low-temperature degrading method, PVC (polyvinyl chloride) is adopted as a raw material, aluminite powder is adopted as a catalyst, aluminum trichloride and iodine are adopted as inducing agents, in an activation solvent system, the raw material, the catalyst and the inducing agents are enabled to react so as to generate the aluminum trichloride and a halogen-free carbon-containing compound at a temperature of 43-100 DEG C. The low-temperature degrading method of the halogenous plastic has the advantages that the problems that most of halogenous plastic require to be degraded under a high-temperature pyrolyzing condition at the temperature of 800 DEG C, nitrogen protection is required and produced hydrochloric acid is highly corrosive are solved, energy consumption can be reduced, equipment can be protected from being corroded, the aluminite powder can be converted into anhydrous aluminumtrichloride after reaction is cover, the problem of difficulty in halogenous plastic degradation is solved, and higher economic value is obtained through plastic degradation.

Description

technical field [0001] The invention belongs to the technical field of plastic degradation, and relates to a degradation method of halogen-containing plastics, in particular to a low-temperature degradation method of halogen-containing plastics. Background technique [0002] With the rapid development of the plastics industry, plastic products are also widely used in industries such as automobiles, electronics, construction, and packaging. Since most products currently require flame retardant grades, halogenated flame retardants are widely used in plastics. middle. However, precisely because of the presence of halogens in plastics, it is more difficult to recycle halogen-containing waste plastics. Because during the processing, the halogens in the halogen-containing plastics are easy to form toxic and harmful halogen-containing compounds such as hydrogen halides, halogenated phenols, dioxins and furans, which not only pollute the environment, but also corrode the processing...

Claims

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Application Information

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IPC IPC(8): C08J11/16C08L27/06C07C1/26C07C11/04C07C11/06
CPCC07C1/26C07C2521/02C08J11/16C08J2327/06C07C11/04C07C11/06Y02W30/62
Inventor 高建峰段政刘艳郝敏徐春燕徐明英
Owner ZHONGBEI UNIV
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