TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The alkali oxy chlorite/bromite comprises sodium hypochlorite, sodium hypobromite, potassium hypochlorite or potassium hypobromite. The base comprises sodium hydroxide, potassium hydroxide, sodium carbonate, sodium bicarbonate, potassium carbonate or potassium bicarbonate.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The solvent used in step (a) comprises cyclic/non-cyclic ethers and/or esters. The solvent used in step (b) comprises cyclic/non-cyclic ethers, esters and/or hydrocarbon solvent. The sodium salt of (I) exhibits a powder X-ray diffraction (PXRD) pattern as given in the figure 5 of the specification. The potassium salt of (I) exhibits a PXRD pattern as given in the figure 9 of the specification. The amorphous form of (I) exhibits a PXRD pattern as given in the figure 13 of the specification. The solvent used in the process-I comprises hydrocarbons, ketones, alcohols and/or cyclic/non-cyclic ethers. The antisolvent comprises ketones, cyclic/non-cyclic ethers, aromatic/aliphatic cyclic and/or acyclic hydrocarbon solvent. The cyclic/non-cyclic ethers comprise tetrahydrofuran, 2-methyl tetrahydrofuran, diisopropyl ether, diethyl ether and/or methyl tert-butyl ether. The esters comprise ethyl acetate and/or butyl acetate. The aromatic/aliphatic cyclic or acyclic hydrocarbon solvent comprises benzene, toluene, xylene, ethyl benzene, trimethyl benzene, n-pentane, n-hexane and/or cyclohexane. The alcohols comprise methanol, ethanol and/or isopropanol. ACTIVITY - Gastrointestinal-Gen.; Antiulcer; Antiinflammatory.    MECHANISM OF ACTION - Proton pump inhibitor.    EXAMPLE - 500 g of 2-(((4-Methoxy-3-methylpyridin-2-yl)methyl)thio)-5-(1H-pyrrol-1-yl)-1H-benzo(d)imidazole was added to a solution of 5 l of tetrahydrofuran and 500 ml of 20% aqueous sodium hydroxide solution at 25-35 degrees C. The mixture was stirred for 15 minutes to give a clear solution. The reaction mass was cool down to -5 degrees C to 5 degrees C and then 5.2 l of aqueous sodium hypochlorite solution was added slowly in 3-4 hours. The reaction mass was stirred for 30 minutes at -5 degrees C to 5 degrees C. 7500 ml of Ethyl acetate was charged to the reaction mass and stirred for 30 minutes. Organic layer was separated and washed with 3.5% sodium bicarbonate solution. The organic layer was distilled below 40 degrees C under vacuum. 1000 ml of Acetone was added into the organic layer and the mass was stirred for 2 hours. The solid product was filtered and washed the wet cake with acetone. The product was dried to yield 350 g of ilaprazole with HPLC purity of 98.34%.