Process for Reducing Sulphates of the Alkalies and of the Alkaline Earths into their corresponding Sulphides by Means of the Action of certain Catalysing Agents.
Номер патента: GB191027477A
Опубликовано: 03-08-1911
Автор(ы): Ettore Cadenaccio, Vittorio Bollo
Принадлежит: Individual
Опубликовано: 03-08-1911
Автор(ы): Ettore Cadenaccio, Vittorio Bollo
Принадлежит: Individual
Реферат: 27,477. Bollo, V., and Cadenaccio, E. Nov. 29, 1909, [Convention date]. No Patent granted (Sealing fee not paid). Alkali and alkaline - earth metal sulphides, barium sulphide, for example, are obtained by heating the corresponding sulphates together with a small quantity, less than 0À2 per cent, of an iron compound, and a solid or gaseous reducing-agent. The iron salt is preferably added in solution, followed by a precipitant unless the salt at a low temperature yields oxide. The reaction takes place at a lower temperature than the known processes require. If the reduction is effected by thermo - electric action, less electric energy is required than would be the case without the catalyst. Specification 13,565/04 is referred to.
Process for the preparation of the bromites of alkaline earth metals in crystallizedform
Номер патента: GB864285A. Автор: . Владелец: SOC ETU CHIMIQUES IND ET AGRI. Дата публикации: 1961-03-29.