Production of odorless reclaimed rubber at low-temperature by desulfurization rapidly from waste vulcanized rubber

A technology of vulcanized rubber and vulcanized rubber powder, which is applied in the recycling process of waste vulcanized rubber, can solve the problems of environmental pollution, high cost, and low efficiency, and achieve the effects of high mechanical properties, low production cost, and high efficiency

Inactive Publication Date: 2006-05-31
DONGGUAN FANGDA HUANYU ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional waste vulcanized rubber regeneration methods take a long time to regenerate, consume a lot of energy, and at the same time emit a large amount of waste gas and waste liquid, causing serious pollution to the environment; using microwave, ultrasonic, high-energy electron beam, etc. to regenerate waste vulcanized rubber requires high inp

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing reclaimed rubber through low-temperature and rapid desulfurization regeneration of waste vulcanized rubber, the main process conditions of which are as follows:

[0022] Step 1. Mixing of waste vulcanized rubber powder and composite regeneration agent

[0023] In a 200 liter high-speed mixer, add 100 kg of waste tire vulcanized rubber powder of 20 mesh to 80 mesh, 8 kg of crushed rosin resin, and slowly add 12 kg of aromatic oil and 1 kg of tetraethylenepentamine under stirring. , 500 grams of ferrous chloride, 500 grams of diphenylguanidine and 1 kilogram of thiol benzothiazole mixture, after stirring for 5-15 minutes, when the material in the mixer is heated to 70-80 ° C due to friction, it can be discharged material.

[0024] Step 2. Parking and ripening of the mixture

[0025] The discharged mixture is piled up in an open container and matured, which is conducive to the further penetration of the regenerant and the continued desulfurization ...

Embodiment 2

[0029] The method for preparing reclaimed rubber by low-temperature and rapid desulfurization and regeneration of waste mixed vulcanized rubber, the main process steps and conditions are as follows:

[0030] Step 1. Mixing of waste mixed vulcanized rubber powder and composite regeneration agent

[0031] Add 100 kg of waste hybrid vulcanized rubber powder of 30-40 meshes and 8 kg of rosin in a 200-liter high-speed mixer, slowly add 15 kg of aromatic oil and 2 kg of triethylenetetramine or polyethylene polyamine, 1 The mixture of 1 kg of ferrous chloride, 0.5 kg of diphenylguanidine, and 1 kg of mercaptobenzothiazole is mixed for 10-20 minutes, and when the temperature of the material in the mixer rises to 70-80°C due to friction, it can be discharged. material.

[0032] Step 2 and step 3 are identical to the processing conditions described in Example 1.

[0033] According to the different sources of waste mixed vulcanized rubber, the tearing strength of the reclaimed rubber p...

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Abstract

A fast devulcanizing production of odorless reclaimed rubber at low temperature from waste vulcanized rubber is carried out by taking waste vulcanized rubber powder with 20-80 mesh as raw materials, adding into mixer in proportion by waste vulcanized rubber powder: polyethylene polyamine: dibasic metal halide: rubber accelerant: mineral oil: natural resin=100:0.1í½2:0.1í½0.5:0.5í½2:5í½15:5í½15, mixing, raising temperature to 50í½80íÒC, blowing off, piling and ageing for 2í½3hrs to obtain devulcanized reclaimed rubber powder, putting the mixed and aged devulcanized reclaimed rubber powder into mixing machine and tabletting to obtain odorless reclaimed rubber. It has simple process, no waste gas and liquid discharge and no pollution environmental pollution.

Description

Technical field: [0001] The invention belongs to the technical field of recycling technology of waste vulcanized rubber, and more specifically relates to a method for preparing odorless reclaimed rubber from waste vulcanized rubber. Background technique: [0002] At present, my country produces nearly 10 million tons of rubber products every year, and the same amount of waste rubber products is also reached. The recycling of resources is a major issue to avoid resource shortage and protect the global environment. The waste vulcanized rubber recycling project has been included in the "China's 21st Century Agenda" program. [0003] The recycling of waste vulcanized rubber is still the most important aspect of the recycling of waste vulcanized rubber. Traditional waste vulcanized rubber regeneration methods take a long time to regenerate, consume a lot of energy, and at the same time emit a large amount of waste gas and liquid, causing serious pollution to the environment; us...

Claims

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Application Information

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IPC IPC(8): C08L17/00C08J11/00C08K5/17
Inventor 吴向东缪桂韶
Owner DONGGUAN FANGDA HUANYU ENVIRONMENTAL PROTECTION TECH CO LTD
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