Linde today announced it has started up a new air separation unit (ASU) to supply gaseous oxygen and nitrogen to Wanhua Chemical Group (Wanhua), the world’s largest producer of isocyanate (MDI), a key ingredient in the manufacture of high-performance adhesives and synthetic fibers. The new plant joins four existing ASUs, also built, owned and operated by Linde, and completes a major expansion project for Wanhua at its integrated chemical site and production center at Yantai Chemical Industrial P