Insoluble sulfur is widely used as a vulcanizing agent for rubber in radial tires. Currently, there are four main methods for producing insoluble sulfur: complexation, gasification, oxidation-reduction, and radiation methods. Next, let's briefly analyze which one is better and which one has more applications?
In industrial production of insoluble sulfur, the first two methods are mainly used. However, the complex melting method can only achieve a conversion rate of about 30% for ordinary sulfur in the production of insoluble sulfur. In contrast, using the gasification method can directly obtain products containing 60% or more insoluble sulfur. When producing products containing 90% insoluble sulfur, the amount of unconverted ordinary sulfur recycled is less, and the post-treatment cost is lower. Therefore, using gasification to produce insoluble sulfur should be more economical.