Patents Examined by Cary P. Straub
  • Process for producing sulfuric acid
    Patent number: 4029751
    Abstract: Sulfuric acid is produced from sulfur trioxide-containing humid gases by a process wherein the sulfur trioxide-containing humid gases are directly cooled with aqueous sulfuric acid, sulfuric acid is condensed and the gas is cooled below dew point of the sulfuric acid, and the water not required to form sulfuric acid is discharged as water vapor with the end gases.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: June 14, 1977
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Karl-Heinz Dorr, Hugo Grimm, Waldemar Weber, Michael Tacke, Georg Schmidt