In chemical engineering and related fields, a unit operation is a basic step in a process. For example in milk processing, homogenization, pasteurization, chilling, and packaging are each unit operations which are connected to create the overall process. A process may have many unit operations to obtain the desired product.
Historically, the different chemical industries were regarded as different industrial processes and with different principles. In 1923 William H. Walker, Warren K. Lewis and William H. McAdams wrote the book The Principles of Chemical Engineering and explained the variety of chemical industries have processes which follow the same physical laws. They summed-up these similar processes into unit operations. Each unit operation follows the same physical laws and may be used in all chemical industries. The unit operations form the fundamental principles of chemical engineering.
Chemical engineering unit operations consist of five classes:
Chemical engineering unit operations also fall in the following categories:
Chemical engineering unit operations and chemical engineering unit processing form the main principles of all kinds of chemical industries and are the foundation of designs of chemical plants, factories, and equipment used.
US Patent Issued to Gemalto on April 26 for "Managing Downloading in Portable Communicating Objects for a Single-Unit Operation During a Campaign" (French Inventors)
May 01, 2011; ALEXANDRIA, Va., May 1 -- United States Patent no. 7,933,585, issued on April 26, was assigned to Gemalto SA (Meudon, France)....
WIPO ASSIGNS PATENT TO THE PROCTER & GAMBLE FOR "SYSTEMS AND METHODS FOR REGISTERING A CONTROLLED WEB TO A PITCHED UNIT OPERATION" (AMERICAN INVENTORS)
Mar 21, 2011; GENEVA, March 21 -- Publication No. WO/2011/031941 was published on March 17. Title of the invention: "SYSTEMS AND METHODS FOR...
Publication No. WO/2010/062302 Published on June 3, Assigned to Micron Technology for Logical Unit Operation (American Inventor)
Jun 04, 2010; GENEVA, June 9 -- Troy Manning, the U. S., has developed a logical unit operation. The patent has been assigned to Micron...