Abstract: This disclosure concerns a process for treating phospho-gypsum waste product from the wet process method of making phosphoric acid including the steps of water washing the phospho-gypsum to remove all but an acceptable level of fluorine before the phospho-gypsum is calcined. The process allows the use of high sulfur coal for the production of steam if desired for use in the overall process. The process also allows for production of SO.sub.3 from part of the phospho-gypsum in an electric furnace to enrich the SO.sub.2 stream for making sulfuric acid.

Abstract: Sulfur dioxide is removed from a sulfur dioxide-containing gas mixture by contacting the gas mixture with a monoolefin or diolefin.

Abstract: This invention is based on the factors that both oxygen gas and oxides of sulphur as well as hydrogen sulphide are highly soluble in saturated, halogenated hydrocarbon liquids which are also dielectric liquids. The absorber liquid, saturated with dissolved oxygen and sulphur dioxide and/or hydrogen sulphide is then ozonated using the solvent or absorber liquid dielectric as the dielectric in an ozone generator. The sulphur trioxide produced by the ozone reacting with the sulphur dioxide and hydrogen sulphide in the presence of a catalyst (accelerates reactions) also carried in the liquid dielectric or, in the liquid stream at the ozonator, is then mixed with sufficient water to absorb the sulphur trioxide and produce the strength of sulphuric acid desired from the system. The sulphuric acid having a different specific gravity than the inert absorber liquid is gravity separated from the absorber liquid.

Abstract: A two-step process for the calcination of basic ferric sulphates in which the basic ferric sulphate is dehydrated by heating in a relatively low temperature range and the dehydrated product is then decomposed by heating in a relatively high temperature range.

Abstract: A process using run-of-the-mill flue dust from open hearth and basic oxygen steel making processes having certain iron-zinc values as a sulfur dioxide absorbent and pollutant control for industrial and public utility furnace flue gases, which materials, upon solid dry injection into a chemical reaction zone of an industrial or public utility furnace in an amount in excess over stoichiometric, results in substantial dry removal of the sulfur dioxide therefrom, and from which reaction products are cleaned by conventional gas cleaning apparatus.

Abstract: 1. In the vapor phase reaction of F.sub.2 with a member selected from the group consisting of ClF.sub.3, Cl.sub.2, BrF.sub.3, BR.sub.2 and SF.sub.4, at elevated pressures and temperatures in a chemical reactor, carried out batch-wise so that reactant gases and product gases are permitted to mix; the improvement which comprises increasing the production capacity of the chemical reactor by raising the temperature of the reactor and contents non-uniformly with respect to position in the reactor so that the reactant and product gases are subjected to different temperature zones depending on their position in the reactor, the temperature of at least one of said zones being high enough to initiate and maintain the reaction therein, the temperature differential between at least two zones of different temperature being at least 3% of the maximum temperature attained in the reactor when measured on the Kelvin scale.

Abstract: A method for producing hydrogen from water in which hydrogen is produced by reducing water using metallic germanium and the by-product, germanium monoxide, is reduced with a reducing agent to metallic germanium which is recycled and reused. In this case, it is necessary to regulate the oxidation of metallic germanium so as to stop at the germanium monoxide stage since the reduction of germanium dioxide to metallic germanium is difficult. Therefore, water vapor is advantageously reduced by using not less than 1 mole of metallic germanium to 1 mole of water vapor or it is indirectly reduced with an intermediate of carbon dioxide.