Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Інститут Хімії Поверхні Нан України, Институт химии поверхности НАН УкраиныfiledCriticalІнститут Хімії Поверхні Нан України
Priority to UA4685860ApriorityCriticalpatent/UA5832A1/en
Publication of UA5832A1publicationCriticalpatent/UA5832A1/en
A process comprises the silica treatment by chrome oxychloride vapors. The silica is successively treated at room temperature by chrome oxychloride for 30-60 min. and ammonia gas for 5-20 min. with a further thermal treatment at 380-560 °C for 5-30 min.
UA4685860A1989-05-031989-05-03Process for the preparation of silica, containing on the surface hexavalent chrome
UA5832A1
(en)
Process and device for recovering and reutilizing heat from hot gases, especially from the exhaust gases of metallurgical processes and the use of this process