THE CONVERSION OF KETOXIME INTO CORRESPONDING AMIDE, KNOWN AS THE BECKMANN REARRANGEMENT, IS A COMMON METHOD USED IN ORGANIC CHEMISTRY AND IS ALSO A TOPIC OF CURRENT INTEREST. IT ACCOMPLISHES BOTH THE CLEAVAGE OF A CARBON-CARBON BOND AND THE FORMATION OF A CARBON-NITROGEN BOND, AND REPRESENTS A POWERFUL METHOD PARTICULARLY FOR MANUFACTURING  E-CAPROLACTAM IN THE CHEMICAL INDUSTRY. THE REACTION GENERALLY REQUIRES HIGH REACTION TEMPERATURE AND STRONG ACIDIC AND DEHYDRATING MEDIA, THUS, THE APPLICATION OF SENSITIVE SUBSTRATES IS USUALLY IMPEDED IN THIS REACTION. ON THIS BASIS, MILD CONDITIONS WERE TRIED AND SEVERAL INTERESTING VARIANTS WERE DEVELOPED. RECENTLY, THE BECKMANN REARRANGEMENT OF KETOXIME WAS REPORTED TO BE ACCOMPLISHED IN THE PRESENCE OF ACID CATALYSTS SUCH AS ALCL3, CHLORAL, ANHYDROUS OXALIC ACID, SOLID METABORIC ACID, BORON TRIFLUORIDE ETHERATE, SULFAMIC ACID, ETC., AS CATALYSTS (1).SULFAMIC ACID (NH2SO3H, SA) IS A DRY, NONVOLATILE, ODORLESS, AND WHITE CRYSTALLINE SOLID WITH AN OUTSTANDING PHYSICAL PROPERTY AND STABILITY. IT IS COMMERCIALLY AVAILABLE AND IS A VERY CHEAP CHEMICAL. RECENTLY, IT IS SHOWN THAT SA HAS THE PROSPECT TO BE USED AS A SUBSTITUTE FOR CONVENTIONAL ACIDIC CATALYTIC MATERIALS. LAST YEAR, IT HAS BEEN USED AS AN EFFICIENT HETEROGENEOUS ACID CATALYST FOR KETAL FORMATION OR ACETALATION, DEPROTECTION OF ACETALS (2).MARINE SPONGE AS NATURAL AND ABSORBABLE SOLID, WHICH HAS OPTICAL ACTIVE COMPOUNDS SUCH AS ALKALOIDS, AND TERPENOIDS, IS A GOOD CATALYST FOR SOLID SUPPORT REACTIONS (3). MARINE SPONGE CAN ACTIVATE THE C-N AND O-H BONDS FOR ORGANIC REACTIONS SUCH AS BECKMANN REARRANGEMENT OF KETOXIMES WITH HIGH EFFICIENCY, AND IS EASILY REMOVED FROM THE PRODUCT. THEREFORE, IN CONTINUE OF OUR RESEARCHES FOR BETTER CATALYST IN BECKMANN REARRANGEMENT OF KETOXIMES IN TERMS OF OPERATIONAL NATURAL CATALYST, SIMPLICITY, WITH GREATER YIELDS OF AMIDES (83-95%).