Minerals process applications processes

Acrylamide is produced commercially by heterogeneous copper-catalyzed hydration of acrylonitrile (79-82). Acrylamide is used primarily in the form of a polymer, polyacrylamide, in the paper and pulp industry, and in wastewater treatment as a flocculant to separate solid material from wastewater streams (see Acrylamide Polymers). Other applications include mineral processing, coal processing, and enhanced oil recovery in which polyacrylamide solutions were found effective for displacing oil from rock. 

Descriptions and discussions of gravity sedimentation in textbooks (and this one is no exception) are usually dominated by water treatment and mineral processing applications. One must not lose sight, however, of the many chemical, pharmaceutical, nuclear, petrochemical or petroleum applications where gravity settling is used to resolve emulsions or to separate other liquid-liquid dispersions. As the density difference in such cases is nearly always low, the benefits of coalescence are usually sought. The present book, as per its title, is concerned primarily with solid-liquid systems and a reader interested in separation of liquid-liquid dispersions is referred to an excellent review of such applications (and of electrostatic coalescence)... 

Chapter 10 Rotary Kiln Minerals Process Applications... 

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