Process for the preparation of (S)-(-)-A-ethyl-2-oxo-1-pyrrolidineacetamide of formula (1) by the steps of condensation of (S)-2-amino butanol of Formula(2)and 4-halobutryl chloride,where halo group can be chloro,bromo or iodo in solvents to from A-ethyl-2-oxopyrrolidine ethanol of formula(3);oxidatio of (S)-A-ethyl-2...

Process for the preparation of (S)-(-)-α--ethyl-2-oxo-1-pyrrolidineacetamide of Formula (I), comprising the steps of (i) resolution of racemic 2-amino butynamide with L-(+)-tartaric acid either in alcoholic solvents like methanol, isopropanol, ethanol or in water or mixture of water-alcohol to provide (S)-(+)-2-amino ...

A method for recovering cobalt and copper from white alloy or Alliageblanc comprises 2 stage leaching step in which a quantity of white alloy or Alliageblanc is treated with an aqueous, acidic solution containing sulfate ion to form a soluble sulfate of the valuable metal contained in the white alloy/Alliageblanc. Thi...

ENERGY EFFICIENT SYSTEM AND METHOD FOR FLUIDIZED BED ROASTING OF SPENT CATALYST TO RECOVER METAL VALUES The present invention relates to an energy efficient system and method for oxidative roasting of waste catalysts bearing precious metals like molybdenum, vanadium, tungsten involving a removal of hydrocarbons, coke...

Process of simultaneous separation of vanadium and tungsten is provided herein. The process generally comprises of selective and simultaneous extraction of metal values include at least V and W from molybdate leach solutions using a secondary carbon primary amine. The solvent extraction process provided herein is a ...

This invention relates to a process forseparating and separately recovering multivalent metal ions (oxoanions and cations) from sodium sulfate solutions containing ammonia, from extraction systems or equivalent processes. Process comprises steps of adjusting the sodium sulfate solution to a pH ranging from about 2 t...