SOLIDIFYING AGENT FOR AQUEOUS SOLUTION OF SULFURIC ACID

摘要

PURPOSE:To solidify efficiently an aqueous soln. of sulfuric acid by adding a polymer of acrylic acid or a copolymer contg. a specific amount of acrylic acid to the aqueous soln. of sulfuric acid and by mixing them. CONSTITUTION:Acrylic acid, a salt thereof acrylamide is homopolymerized to manufacture a polymer, or =50wt% of said monomer is copolymerized with =50wt% other copolymerizable monomer to manufacture a copolymer. The copolymerizable monomer is a hydrophilic monomer such as methacrylic acid or itaconic acid or a hydrophobic monomer such as methyl acryl acrylate or styrene. The polymn. is carried out by a conventional method, and the average mol.wt. is adjusted to =about 50,000. The polymer or copolymer is added to an aqueous soln. of sulfuric acid by about 1-20wt%, and by mixing them, the aqueous soln. of sulfuric acid can be solidified. Sulfuric acid which can be solidified ranges from about 98% concd. sulfuric acid to about 1%dil. sulfuric acid.