A semiconductor includes a memory cell array including a plurality of memory cells. This activated bentonite catalyst may be used to polymerize a vinyl, acrylic, cyclic ether, aldehyde, lactone or olefin monomer. Relevant policies may be transferred while not relevant policies are not. 0 and R is an alkyl, cicloalkyl or aryl radical having 1-12 carbon atoms, with a liquid phase comprising one or more compounds capable of reacting with the \u2014OH groups of said adduct to obtain a slurry containing a MgCl2. These effectively remove grease and oil and can be emulsified into water to form an aqueous cleaning composition.