The book focuses on the goals President and direction, also focused on the theoretical side of the important parts where only the fundamental equations for the student depends on the same search in the scientific references relevant to the exact detail. Tests were selected on the devices available in the laboratory and in the Joint Operations Engineering Department of Chemical Engineering College-King Saud University in Riyadh, Saudi Arabia, which is one of the newest devices in the area of specialization, which covers aspects desired, included joint operations and the transition phenomena Bjawabnha three (art. , temperature, the amount of movement), in addition to chemical reactors. The book consists of seven chapters and ends with bibliographic terminology and the Scouts topics.