PL4232B1 - Method for cleaning gases from coke ovens and similar gases. - Google Patents

Description

FirstMftiBtwec November 17, 1925 jv C £ a »ci &,). As is known, the question of the preliminary purification of coke oven gases, which are separated by an anti-scratch method, is very important. We will present the invention in several ways. to be used in whole or in part. Tar-free gases are subjected to centrifugal force to mechanically separate the liquid and solid parts. The compressed hydrocarbons usually get to the tower equipped with Rschig rings, through which the current of heavy oils injected by the pump flows. From the oils, removed from the tower, benzol is obtained, and the rest of the hydrocarbons are taken to the second Fresh with Rasehig's rings cresol or other suitable solvent, the Cresol is subjected to an appropriate temperature to remove small amounts of absorbed non-bodies and recirculated. Small amounts of bodies absorbed by the cresol are not worth separating, but they could hinder the operation of the condensers. The carbonic acid in the Raschig ring column is taken with a circulating ammoniacal solution. The solution is then refreshed according to the method patented in France, namely: "A method of removing carbonic acid, and possibly hydrogen sulfide from gases containing it, while continuously refreshing the absorbing liquid", or it is also distilled to separate the ammonia and send it to apparatus in which The rest of the ammonia from the gases in the tower (or in the extension of the previous one) is absorbed into the circulating water. In the case indicated in the brackets, the water is put into an ammonia solution. a more precise absorption of carbonic acid is supplemented by the action of ammonia with a solution of soda in another column. By adding glycerin to the soda in a certain ratio, it is easier Gases treated in this way, apart from moisture, may still contain traces of soda and ammonia, so they should be removed most thoroughly. For this purpose, in the last column, they can be subjected to the action of a current of sulfuric acid, which has a triple effect, i.e. dries, removes traces of soda and ammonia. The method of drying is particularly advisable when it is necessary to transform the mono into sulphate. Apply. then very large amounts of sulfuric acid which pass through the column, losing little water, so that the concentrated acid is not detrimental to the metal walls of the apparatus. Moreover, a very small amount of the catalyst added to the acid allows the acid to rapidly absorb, under pressure, a significant portion of the ethylene which can be converted into alcohol. The sulfate acid, entrained with gases, is retained in an additional vessel containing, if necessary, hard sodium. PL

Claims (3)

Patent claims. 1. The method of purifying gases from coke ovens and analogous gases, separated by condensation, characterized by the fact that after removing the tar, mechanical separation of solid and liquid parts by means of centrifugal force is applied, because the compressed hydrocarbons are separated by heavy oils, thus that the remainder of the hydrocarbons may be isolated with cresol or other analogous solvent. 2. The method according to claim 1, characterized by the fact that after the absorption of the carbohydrate, soda with the addition of glycerin interacts with the gas to remove the carbon sulfide. 3. The method according to p. 1 and 2, the significant point that the gas is purified with sulfuric acid in metal apparatuses in order to dry it and remove traces of soda and ammonia, using a catalyst that absorbs ethylene. ,, L 'Air Liauide ", S-te anonyme pour PEtude et 1' Exploitat io n des Procedes Georges Claude, Deputy: I. Myszczynski, patent attorney. PL