swelling or sodium bentonite.
Two types of bentonite are generally identified. One is called the swelling type or sodium bentonite, which has single water layer particles containing Na+ as the exchangeable ion. The other has double water layer particles with Ca+ The most predominant forms of clay minerals used in traditional and natural medicine are calcium bentonite and sodium bentonite. Through its journey through nature, clay becomes specialized due to natural weathering. Bentonite is an impure clay formed by the weathering of volcanic ash. It is an absorbent material that is able to bond with the floating particles that cause cloudiness in wine. The main types used to fine wine are sodium and calcium bentonite. Wyoming has 70 percent of the world’s known supply of bentonite, which is also produced in Greece, Japan, Italy, Brazil, Romania, Germany, Mexico, Argentina, Spain, India, Hungary, Poland, Canada, Turkey, and Cyprus. Two types of bentonite are generally identified. One is called the swelling type or sodium bentonite, which has single water layer particles containing Na+ as the exchangeable ion. The other has double water layer particles with Ca++ as the exchangeable ion. It is called calcium bentonite or non-swelling type. AMCOL International is one of the world’s largest producers of Bentonite clay and we achieve this without jeopardizing the environment. In fact, our expert teams have decades of mining expertise which allow them to not only restore but rather improve the native landscape around our reserves. Bentonites. Definition: Bentonite is defined as a naturally occurring material that is composed predominantly of the clay mineral smectite. Most bentonites are formed by the alteration of volcanic ash in marine environments and occur as layers sandwiched between other types of rocks. 1 729 The number of people bentonite mining employed in 2014. 2  16x Wyoming Bentonite can swell up to 16 times its original size. 3  70% Bentonite deposits in Wyoming make up to 70 percent of the world’s known supply. Bentonite is subject to the federal laws of the 1872 Mining Act. From a commercial standpoint, there are two primary types of natural bentonite, sodium and calcium. Sodium-Bentonite is characterized by its ability to absorb large amounts of water and form viscous, thixotropic suspensions.
http://www.mineralszone.com/minerals/bentonite.html http://eytonsearth.org/bentonite.html http://winemakersacademy.com/bentonite-clarify-wine/ http://www.wyomingmining.org/minerals/bentonite/ http://www.mineralco.net/bentonite/bentonite-mineral.php http://www.amcol.com/pdf/SocialResponsibility/Bentonite%20Mining%20and%20Reclamation.pdf http://www.claysandminerals.com/materials/bentonites http://www.wyomingmining.org/minerals/bentonite/ http://www.amcol.com/pdf/SocialResponsibility/Bentonite%20Mining%20and%20Reclamation.pdf
what kind of mining is bentonite