Patent GB-1047943-A (GB)
Title: Improvements in or relating to agglomerates
IPC: B01J20/18
Filed: 1963-04-24
Abstract: An agglomerate of naturally occurring zeolite ore free of added binder materials, and having a crush strength as measured by a Radial Crush Test of greater than 5 lb. may be prepared by comminuting the ore to a particle size of less than 40 mesh (U.S. standard), mixing the comminuted ore to form a substantially homogenous mixture of the said ore; thereafter mixing sufficient water with the mixture to form a pliant mass, granulating this mass and then firing the granules at a temperature of at least 375 DEG  C.  At least 60% by weight of the ore used is zeolite and may be chabazite, mordenite, erionite, clinoptilolite, phillipsite, or mixtures thereof.  The water content of the pliant mass is preferably 35% to 45% by weight, and said mass is granulated, either by tableting or rolling, and the granules produced may, prior to firing, have their water content reduced to 15% by weight including the water of hydration of the zeolites, by heating the granules at a temperature of 100 DEG  C. to 150 DEG  C. The zeolite ore may be comminuted to form a mass having a surface area of at least 10 sq. m/gm.  The agglomerate so formed may be subsequently stabilized towards acid by contacting with an acid, preferably a mineral acid, in the form of a gas or an aqueous acid medium at ambient or elevated temperature.  The agglomerate may be used as an adsorbent in processes in which an acid and water are required to be separated from a feed stream containing them.  Such processes are exemplified as, reformer hydrogen drying, chlorine drying, the purification of chlorinated or fluorinated hydrocarbons, stackgas purification, and HCl removal from by-product hydrogen streams.ALSO:Agglomerate of naturally occurring zeolite ore free of added binder materials, and having a crush strength as measured by a Radial Crush Test of greater than 5 lbs may be prepared by comminuting the ore to a particle size of less than 40 mesh (US-standard), mixing the comminuted ore to form a substantially homogenous mixture of the said ore; thereafter mixing sufficient water with the mixture to form a pliant mass, granulating this mass and then firing the granules at a temperature of at least 375 DEG C. At least 60% by weight of the ore used is zeolite and may be chabazite, mordenite, erionite, clinoptilolite, phillipsite, or mixtures thereof.  The water content of the pliant mass is preferably 35 to 45% by weight, and said mass is granulated, either by tableting or rolling, and the granules produced may, prior to firing, have their water content reduced to 15% by weight including the water of hydration of the seolites, by heating the granules at a temperature of 100 DEG C. to 150 DEG C.  The zeolite ore may be comminuted to form a mass having a surface area of at least 10 sq.m/gm.  The agglomerate so formed may be subsequently stabilized towards acid by contacting with an acid, preferably a mineral acid, in the form of a gas or an aqueous acid medium at ambient or elevated temperature. The agglomerate may be used as an adsorbent in processes in which an acid and water are required to be separated from a feed stream containing them.  Such processes are exemplified as, reformer hydrogen drying, chlorine drying, the purification of chlorinated or fluorinated hydrocarbons, stack-gas purification, and HCl removal from by-product hydrogen streams