Production of recycled rubber by microwave desulfurization

1. Production of reclaimed rubber by microwave desulfurization

Microwave in daily life and industrial production has been widely used, Anhui Ruida science and technology independent research and development of environmental protection waste rubber microwave desulfurization automatic production line, using microwave can assist catalytic chemical reaction, in recent years, microwave chemistry has been in the chemical industry, rubber vulcanization preheating, microwave desulfurization, many encouraging results. Microwave heating and traditional heating methods are different, it is the microwave energy penetration to be heated medium internal heating, so heating quickly, save energy consumption, and can use automatic control, improve working conditions.

2. Principle of microwave desulfurization

Microwave desulfurization is the use of microwave energy to control the broken C-C, S-S crosslinking of vulcanizates. The relationship between microwave energy and wavelength can be used to selectively cut the crosslinked bonds in rubber molecules. The recycled rubber produced by this method has fewer c-C bond broken chains and good performance. Microwave desulfurization process generally does not use additives, can be 6~8mm size colloidal desulfurization directly, while the traditional desulfurization method requires 24 ~ 30 mesh colloidal powder, so it can save the energy consumption of pulverizing colloidal particles, microwave desulfurization temperature is 260~350°C, desulfurization time is short, high production efficiency.

3. Compared with dynamic desulfurization method, microwave desulfurization method has many advantages, such as: no need to use regeneration promoter, antiaging agent can produce tasteless recycled rubber, no pollutant emissions in the production, has great social benefits; In the process of desulfurization, the colloidal particles absorb microwave energy and heat up from the inside, which has high energy utilization rate, fast heating up, short desulfurization time and saves energy consumption. Desulphurization process is a continuous automatic process with low labor intensity and clean production environment. The performance of recycled rubber is good, and the dosage of recycled rubber in the rubber formula can increase by about 15% compared with that of conventional recycled rubber. Microwave desulphurization is not only energy-saving, environmental protection, and the quality of recycled rubber is good, the application of microwave desulphurization technology shows a good development prospect.