Method for recycling lyvinylidene chloride waste

A polyvinylidene chloride, waste technology, applied in the field of polyvinylidene chloride waste recycling, to achieve good economic benefits, excellent performance, low cost effect

Active Publication Date: 2014-12-10
JUHUA GROUP TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few reports on the use of polyvinylidene chloride waste to prepare porous carbon materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Weigh 42.5kg of pulverized polyvinylidene chloride waste, 4kg of KOH, 3.5kg of methyl methacrylate / acrylic ester copolymer, mix at 200rpm for 15min, and extrude through a twin-screw with an aspect ratio of 35:1 extruder (manufacturer: Qingdao Kechuang Plastic Machinery Co., Ltd.) for extrusion and granulation, set the temperature of the mixing section of the twin-screw extruder to 170°C, the temperature of the plasticizing section to 190°C, the temperature of the compression section to 200°C, and the temperature of the head The temperature is 180° C., and the feed rate of the materials is controlled so that the residence time of the materials in the twin-screw extruder is 15 minutes to obtain granulated materials. Put the obtained pellets into an oven under inert gas N 2 In the atmosphere, the temperature was raised from 25°C to 400°C at a heating rate of 5°C / min, kept at a constant temperature for 1 hour, then raised to 700°C at a heating rate of 10°C / min, carbonized a...

Embodiment 2

[0038] Take by weighing 44kg of pulverized polyvinylidene chloride waste, NaOH 2kg, epoxidized soybean oil 2kg, after mixing for 15min at 300rpm rotating speed, through a twin-screw extruder with aspect ratio 35:1 (manufacturer: Qingdao Kechuang Plastics Co., Ltd. Machinery Co., Ltd.) for extrusion granulation, set the temperature of the mixing section of the twin-screw extruder to 170°C, the temperature of the plasticizing section to 190°C, the temperature of the compression section to 200°C, and the temperature of the head to 180°C to control the feeding of materials The material speed was increased so that the residence time of the material in the twin-screw extruder was 16 minutes to obtain the granulated material. Put the obtained granulated material into an oven, in an inert gas Ar atmosphere, start to heat up from 25°C to 450°C at a heating rate of 7.5°C / min, keep the temperature for 1.5h, and then raise the temperature to 750°C at a heating rate of 12.5°C / min , carboni...

Embodiment 3

[0040] Take by weighing pulverized polyvinylidene chloride waste 47.5kg, Ca(OH) 2 2kg, 0.75kg of methyl methacrylate / acrylate copolymer, 0.75kg of epoxy soybean oil, after mixing for 5min at 400rpm rotating speed, through a twin-screw extruder with aspect ratio 35:1 (manufacturer: Qingdao Kechuang Plastics Co., Ltd. Machinery Co., Ltd.) for extrusion granulation, set the temperature of the mixing section of the twin-screw extruder to 170°C, the temperature of the plasticizing section to 190°C, the temperature of the compression section to 200°C, and the temperature of the head to 180°C to control the feeding of materials The material speed was increased so that the residence time of the material in the twin-screw extruder was 17 minutes to obtain the granulated material. Put the obtained pellets into an oven under inert gas N 2 In / Ar mixed gas atmosphere, start to heat up from 25°C to 500°C at a heating rate of 10°C / min, keep the temperature constant for 2 hours, then raise ...

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Abstract

The invention discloses a method for recycling lyvinylidene chloride waste. The method comprises the following steps: (a) proportioning pulverized lyvinylidene chloride waste, alkaline metal hydroxide and a plasticizer in parts by weight and then stirring and mixing, and extruding and pelletizing at a temperature of 170-200 DEG C; (b) heating the pelletized material in an inert gas atmosphere at two different heating rates to 700-800 DEG C from 25 DEG C in two steps, and cooling to 25 DEG C at the rate of 10-20 DEG C / min to obtain carbonized material; and (c) immersing the carbonized materials into an alcohol solution of phenolic resin for 1-2 hours, and heating the carbonized material to 850-900 DEG C from 25 DEG C at two different heating rates in two steps, and cooling to 25 DEG C at the rate of 5-10 DEG C / min to obtain a porous carbon material. The method is simple in process, friendly to the environment, low in cost and good in economic benefits.

Description

technical field [0001] The invention relates to a method for recycling waste, in particular to a method for recycling polyvinylidene chloride waste. Background technique [0002] Polyvinylidene chloride is currently widely used in food packaging, artificial turf, wigs, fishing nets and other fields. During the processing and use of polyvinylidene chloride, it is inevitable to produce a large amount of waste materials, leftover materials and discarded materials after use. Since polyvinylidene chloride is easy to decompose at high temperature, it is difficult to recycle and reprocess polyvinylidene chloride waste; direct incineration causes environmental pollution and high energy consumption. [0003] Porous carbon material is a new type of non-polar carbon adsorbent material developed in the 1960s. Porous carbon materials have uniform pore size distribution, high chemical stability and gas selectivity. At present, porous carbon materials have been widely used in environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B09B3/00
Inventor 付铁柱张成德姜文军
Owner JUHUA GROUP TECH CENT
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