Method for regenerating waste rubber by coordinating twin-screw extruder with environment-friendly regenerant
A twin-screw extruder and waste rubber technology, applied in the field of waste rubber regeneration, can solve the problems of time-consuming, low desulfurization efficiency, and excessively long operation time, and achieve the effects of simple and easy-to-obtain raw materials, high production efficiency, and environmental friendliness.
Active Publication Date: 2014-12-10
珠海科茂威新材料有限公司
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Problems solved by technology
Physical regeneration is the use of external energy, such as force, heat, microwave, ultrasonic, ray energy, etc., to crush waste rubber to obtain rubber powder, so that the three-dimensional network structure of vulcanized rubber is destroyed to obtain plastic reclaimed rubber. The physical regeneration method consumes a lot of energy , low efficiency, poor reuse effect
Chemical regeneration is to use some chemical additives such as organic disulfide, mercaptan, alkali metal, etc., at a certain temperature, let the chemical additives interact with the S-S bonds in the waste vulcanized rubber to break them and achieve the purpose of regeneration. The disadvantage is Very time consuming, solvent contamination issues are difficult to resolve
Bioregeneration means that the cross-sulfur bonds of vulcanized rubber are broken or desulfurized under the action of microorganisms, so that the waste rubber can be processed again, but the biological regeneration method requires a large area, long operation time, and complicated equipment. , The problem of biological difficulty in finding effective desulfurization and low desulfurization efficiency is still in the stage of experimental research
The application number is 200910080211.X, which discloses a method of desulfurizing and regenerating vulcanized rubber using a twin-screw extruder. This method utilizes two high-compression-ratio, high-wear-resistance twin-screw extruders to be directly connected, and then through the action of the twin-screw to Realize high temperature and high pressure, make the regenerant penetrate into the waste rubber powder, break the cross-linking bond of rubber, and realize the desulfurization and regeneration of rubber. Although this method replaces high temperature and high pressure reactor, compared with the traditional desulfurization process, this method is continuous, safe and fast , less waste gas emission and uniform desulfurization, but when the second twin-screw extruder is used for secondary pressurization and heating, the pressure reaches 5MPa and the temperature reaches 300°C. Chemical additives such as phenol disulfide, which not only has high energy consumption, but also has the problem of polluting the environment due to the emission of sulfur-containing waste gas
Method used
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Embodiment 1
[0014] Example 1: Add 100 parts of waste vulcanized rubber powder with a particle size of 12 meshes, 2.5 parts of cottonseed oil, 4.5 parts of rosin, 0.65 parts of tartaric acid and 9 parts of water into a high-speed mixer at a speed of 2000 r / min and a temperature of 80 ° C for 15 min. ; Add the mixed powder into a twin-screw extruder to obtain reclaimed rubber, the speed of which is 170 rpm and the temperature is 240°C.
Embodiment 2
[0015] Example 2: Add 100 parts of waste vulcanized rubber powder with a particle size of 15 meshes, 1 part of castor oil, 1 part of rosin, 0.5 parts of tartaric acid and 6 parts of water into a high-speed mixer at a speed of 2000 r / min and a temperature of 70 ° C for 20 min. ; Put the mixed powder into a twin-screw extruder to obtain desulfurized reclaimed rubber, the speed of which is 120 rpm and the temperature is 200°C.
Embodiment 3
[0016] Example 3: Add 100 parts of waste vulcanized rubber powder with a particle size of 20 meshes, 4 parts of soybean oil, 8 parts of rosin, 0.8 parts of limonene and 12 parts of water into a high-speed mixer at a speed of 2000 r / min and a temperature of 90 ° C for 10 min. ; Add the mixed powder into a twin-screw extruder to obtain reclaimed rubber, the speed of which is 220 rpm and the temperature is 280°C.
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Abstract
The invention discloses a method for regenerating waste rubber by coordinating a twin-screw extruder with an environment-friendly regenerant, and belongs to the technical field of regeneration of waste rubber. The method comprises the following steps: taking waste rubber and the regenerant as main raw materials, controlling an operation temperature to be lower than 280 DEG C, effectively breaking an S-S bond in the waste vulcanized rubber by virtue of synergistic effect of the twin-screw extruder and the regenerant to realize quick desulfuration and regeneration. And the method for regenerating the waste rubber is safe, simple, continuous, energy-saving and environmentally friendly.
Description
technical field [0001] The invention relates to a recycling method for waste rubber, in particular to a method for synergistically regenerating waste rubber with a twin-screw extruder and an environmental regenerant, and belongs to the technical field of waste rubber regeneration. Background technique [0002] my country is a big producer and consumer of rubber in the world. With the accumulation of waste rubber, the problem of solid environmental pollution is becoming more and more serious. Therefore, the recycling technology of waste rubber resources has become the focus of people's attention. [0003] At present, there are three kinds of regeneration methods for waste rubber: physical regeneration, chemical regeneration and biological regeneration. Physical regeneration is the use of external energy, such as force, heat, microwave, ultrasonic, ray energy, etc., to crush waste rubber to obtain rubber powder, so that the three-dimensional network structure of vulcanized rub...
Claims
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IPC IPC(8): C08J11/10C08L21/00C08L91/00C08L93/04C08K5/092B29C47/92B29C48/92
CPCY02W30/62
Inventor 钱运华杨勇方慧敏张雪胡涛蒋金龙程晓春于鹄鹏
Owner 珠海科茂威新材料有限公司