we want to buy C4 (isobutylene)

our company is a leading trading company in China, one of our customers is seeking a new quality C4 supplier, and it is used to produce polyisobutylene and MTBE. The C4 consumption in their factory is about 60000 tons each year. the main requirement is: isobutylene content is not less than 70%; and sulfur content should be less than 5PPm. If you can supply the same; pls send us the specification details with best quotation to Qingdao port China.

starch glue