This report provides a comprehensive analysis of the technology, economics, and markets for the processing of the C4 hydrocarbon chain, which includes butadiene, isobutylene, butenes, and butanes. Commercial and developing process technologies are discussed. Cost of production estimates have been developed to illustrate the cost competitiveness of butadiene, isobutylene, and butene-1 production in the USGC, China, Middle East, Southeast Asia, and Western Europe. A market overview of the C4 chain is provided, along with demand by end-use, capacity, and supply/demand/trade data for Global, North America, Western Europe, and Asia Pacific.