The author has given careful and precise descriptions of applied concepts, including the design and the development of a new technology for obtaining hydrocarbon solvents from gas condensates. Research in the book incorporates the fundamental subjects, including the investigation of highly effective extractants (individual and composite) for the extraction of aromatic hydrocarbons from the fractions of gas condensate particularly the individual aromatic hydrocarbons toluene and benzene, which constitute up to 6% of entire raw material. This book intends to present novel methods and ideas from the Petroleum and Gas Engineering and Chemistry, and to share them with a broad audience of Teaching Professionals, Undergraduate and Postgraduate students, Doctoral degrees, Scientists, Engineers, and any person with interest and basic understanding of petrochemistry. The book reflects the results of a challenging research of designing new technologies and processes in the applied field of Petroleum and Gas Chemistry, which still contains wide unexplored areas for research. The book includes sections on the applications of technologies for the extraction and rectification of solvents. The book also put a particular emphasis on the solvents used for the production of varnish dye paint materials, an area often left out of introductory textbooks.