Method of producing environment-friendly regenerated rubber via low-temperature desulfurization

Abstract

The invention discloses a method of producing environment-friendly regenerated rubber via low-temperature desulfurization. The method includes the steps of: 1) low-temperature desulfurization througha desulfurization tank or an internal mixer: feeding rubber powder, a composite regenerating activator, and a Mooney stabilizer into the desulfurization tank or internal mixer, performing pressurizedmixing for a certain time, adding an environment-friendly softener such as rosin, performing pressurized mixing for a certain time, heating the material to 120 + / - 5 DEG C for desulfurization regeneration; 2) after regeneration for a certain time, cooling the material to lower than 70 DEG C, discharging the material into a cooling stirrer; 3) at 120 + / - 5 DEG C, delivering the material to a doublescrew plasticizer, cooling the material and discharging the material to a storage plate, and delivering the material to a refiner; 4) circulating the rubber at 40 DEG C in a thin-passing manner for 5min, and automatically cutting and weighing the rubber. The technology has outstanding economic and social benefits.

Description

technical field [0001] The invention relates to a method for producing environmentally friendly reclaimed rubber through low-temperature desulfurization, which belongs to the field of regenerated rubber preparation. Background technique [0002] The amount of waste rubber materials is second only to waste plastics among waste and old polymer materials. Among them, my country's tire production ranks first in the world, and the number of automobiles ranks first in the world (about 194 million vehicles). The annual scrapping volume of automobile tires in China is more than 350 million, with a mass of about 12.7 million tons. China's rubber consumption ranks first in the world, about 9 million tons, of which 56% of rubber consumption needs to be imported, so the recycling of waste rubber can alleviate the shortage of rubber raw materials to a certain extent, realize the reuse of waste resources, and benefit the social economy of sustainable development. [0003] Using waste ti...

AI Technical Summary

Problems solved by technology

[0003] Using waste tires and other rubber products to produce traditional regenerated rubber uses dynamic desulfurization tanks to desulfurize at high temperatures (220 to 300°C), changing elastomers into plastics. During this production process, a large amount of toxic substances are produced due to high temperature The exhaust gas and waste water seriously pollute the environment and affect the health, especially the health of the workers in the enterprise. In severe cases, it may even cause cancer.

At present, the government pays special attention to the problem of environmental pollution. Therefore, the Environmental Protection Bureau has closed down many small reclaimed rubber companies that do not meet the environmental protection standards. Some large reclaimed rubber companies have invested a lot of money in the treatment of waste gas and waste water. bad smell

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