Process for processing of old rubber

摘要

There is a processing of old rubber in which regenerated rubber is produced from comminuted old rubber with devulcanisation. It is desirable in this connection for the processing to be biotechnological. This is achieved by keeping the comminuted old rubber in a bacterial suspension of chemolithotrophic microorganisms with introduction of air until sulphur has separated as elemental sulphur and/or sulphuric acid from the remaining replasticised regenerated rubber. This biotechnological processing produces in a simplified manner regenerated rubber and sulphur, both of which can be reused.