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Ways to reduce CO and NO emissions in the installation for environmentally friendly rubber incineration
... [2,3] In the past, methods such as the incineration and rubber powder production have been primarily utilized for waste rubber management. [4][5][6][7] However, these approaches fail to effectively utilize the residual value of the material and impose additional environmental burdens. To date, techniques involving ultrasound, microwave, and microbial processes have been reported. ...
When the AlCl3/toluene system is employed as a catalyst, the vulcanized rubber obtained from the dodecanedioic acid (DA)‐based vulcanization of epoxidized natural rubber (ENR) can be effectively decrosslinked at 160 °C over a period of 18 h. The reclaimed rubber can subsequently be revulcanized using DA, thereby demonstrating favorable recyclability and mechanical properties (tensile strength is 2.5 MPa, elongation at break is 91.6% and the rate of degradation is 100%). During the reaction process, AlCl3 coordinates with the carbonyl oxygen atoms within the cross‐linking network, facilitating a nucleophilic substitution reaction between water (as the nucleophile) and ester groups. This reaction leads to the formation of hydroxyl groups, some of which undergo dehydration to form carbon‐carbon double bonds. Through comprehensive characterization of the reclaimed rubber and model compounds, the plausible decrosslinking mechanism of the vulcanizate was elucidated.
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