Abstract:
Copolymers made from Alpha -hydroxyacrylic acid and acrylic acid. The copolymers contain between 9 and 85 mol percent of acrylic acid and have a specific viscosity within the range 0.05 to 1.0, determined on a 1 weight percent solution of the copolymers in aqueous 2N-sodium hydroxide solution, at 20*C.
Abstract:
The disclosure relates to a process for making catalytically active aluminosilicates from glasses by hydrothermal crystallization. The hydrothermal crystallization is more particularly effected in the presence of an aqueous solution of an inorganic alkali metal compound producing an alkaline reaction. Useful alkali metal compounds comprise alkali metal carbonate, water glass, alkali metal hydroxide or alkali metal phosphate. The catalytically active aluminosilicates can be used for dehydrating alcohols, ethers and other oxygen-contain-ing organic compounds with formation of hydrocarbons, or for isomerizing or alkylating hydrocarbons.