An Improved Process for Producing Carbonate of Soda, Caustic Soda, Carbonate of Potash, Caustic Potash and the like, and Apparatus therefor.

摘要

13,119. Thompson, W. P., [Savon frÞres & Cie.]. June 11. Chlorine, obtaining, in the manufacture of caustic soda or potash or their carbonates from the chloride by electrolytic action in the presence of compressed air. Figs. 1 and 2 show the apparatus. The chloride solution or concentrated sea - water is heated in a tank A and flows into the electrolytic apparatus B through the pipe c. The electrolytic cell includes a number of discs f, preferably made of hardened lead or an alloy of lead and antimony, threaded on an insulating-tube j and separated by insulating- washers k. Above them is a perforated vessel E also formed of lead. It is provided with terminals Px, Px', and forms the anode. Compressed air is forced into the vessel through a pipe r passing down through the insulating-tube j and provided at the lower end with a perforated distributing- ring p. The tube is fitted with a terminal P2, and thus forms the cathode. The chlorine passes off through the pipes v, v1, and may be collected or utilized. The vessel B may be of wood, first coated with garlic and allowed to dry, and then coated with a mixture of linseed oil, india-rubber, and asbestos. The tube r may be wrapped with asbestos and similarly coated to protect it. The solution discharges through the pipes u, u1, y into a tank F, whence it is forced back by compressed air into the tank A, to be again passed through the vessel B until the last trace of chlorine has been removed. When the carbonite is to be produced, carbonic acid gas is forced into the liquid. Fig. 3 shows a convenient apparatus. A vessel M is fitted to the pipe Y, and the gas is forced through a pipe d, mixing with the liquid and passing through a rose w.