Bentonite, Kaolin and Selected Clay Minerals (EHC 231, 2005)
Some of the calcium bentonite produced in Texas, USA, is, for example, treated with sodium hydroxide to replace calcium with sodium in the montmorillonite and make the resulting product more suitable for use in drilling mud (Hosterman Patterson, 1992). An organicclad bentonite is produced for speciality purposes (paint, speciality greases ...