"People's Republic of China chemical industry standard (HG/T 2825-2009 instead of HG/T 2825-1997) as follows:" HG/T 2825-1997 and clay particles compared to the main differences: the standard revised product specifications, by type I and type II of the expansion of the A, B, C three specifications (1997 version of this version of the table 1, table 1) - increase; specifications of the surface area between the original industry standard type I and type II, debromination index method was determined by the initial activity of alkene bromine index were measured.
This standard is proposed by China petroleum and Chemical Industry Association, the National Chemical Standardization Technical Committee of inorganic chemical branch (SAC/T (263/SC1) shall, by CNOOC Tianjin chemical research and Design Institute, Liaoning Yixian petroleum clay Co. Ltd and Ezhou city of Hubei Province Mining Company Limited, Hangzhou enlightenment Yongsheng catalyst Co. Ltd. draft, the main drafter Fan Guoqiang, Wang Chunlin, He Haijun, Zhu yonglin.
Standard for granular clay