Hydrogen fluoride manufacture

Raw Materials. Essentially all hydrogen fluoride manufactured worldwide is made from fluorspar and sulfuric acid, according to the reaction ... [Pg.195]

Figure 8.5.1. ConceptUiJ diagram of typical hydrogen fluoride manufacturing process.

Phosphorus pentachloride, 79 40, 42-44 end use of chlorine, 6 135t sodium reactions with, 22 766 Phosphorus pentafluoride, 79 33 Phosphorus pentahalides, 79 31-33 Phosphorus pentoxide, 79 49, 69. See also Phosphorus(V) oxides as cellulose solvent, 77 272 in hydrogen fluoride manufacture, 74 11 vapor of, 79 49... [Pg.699]

Reaction feed streams, continuous drying of, 18 522 Reaction furnace chemistry, 23 604 in hydrogen fluoride manufacture, 14 11-12... [Pg.788]

Sulfide sulfur, in hydrogen fluoride manufacture, 74 11 Sulfide toning, photographic, 79 220... [Pg.900]

Hydrogen fluoride Manufacture of chemicals, plastics, photographic film, solvents Irritation, edema... [Pg.318]

Figure 8.5.1 presents a block diagram of a typical hydrogen fluoride manufacturing process. The degree to wliich tliis reaetion proeeeds is dependent on tlie purity and fineness of tlie fluorspar, tlie coneentration of tlie sulfurie aeid used, tlie ratio of sulfuric acid to fluorspar, tlie temperature of the reaetion, tlie time allowed for completion of tlie reaction, and tlie intimacy of mixing of tlie... [Pg.272]

Industrial production of CFCs is achieved by successive replacement of chlorine in chlorocarbons by fluorine, using anhydrous hydrogen fluoride and a catalyst. - This use consumes about 50% of the hydrogen fluoride manufactured in the world. The extent of chlorine exchange can be controlled by... [Pg.459]

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