Improvements in or relating to the manufacture of bismuth hydroxide
Реферат: 332,504. I. G. Farbenindustrie Akt.- Ges. Dec. 3, 1928, [Convention date]. Medicines for internal use. - Finely divided bismuth hydroxide, which when suspended in oil, may be used medicinally, for instance in the treatment of syphilis, is obtained by precipitating an aqueous solution of a bismuth salt by means of an alkali, and drying the filtered precipitate by first washing with a solvent which is more volatile than and. soluble in water, then washing with a second volatile solvent, and finally evaporating the second solvent. As first solvent alcohol, methanol, or acetone may be used, and as second solvent ether, ethylchloride or chloroform.
Improvements relating to processes for the manufacture of alkali metal hydroxides, sulphur dioxide and sulphuric acid
Номер патента: GB639855A. Автор: . Владелец: CASPAR WILHELM DORBACH. Дата публикации: 1950-07-05.