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Mechanical & Green Technologies

Obtaining Silver Nano Particles From Metallic Silver Containing Waste

1649-MUM-2012

Invention relates to aromatic carboxylic acid in water and neutralizing with base till clear solution is obtained which is used to prepare reaction mixture to digest silver containing waste material to obtain salt of the aromatic carboxylic acid, the waste material is digested for an hour and filtered through standard filter paper, the same is oxidised in crucible till white ash is obtained, in which concentrated nitric acid is added in presence of catalyst to obtain silver nitrate; which is further treated with alkali citrate solution and heating it till pale yellow colour appears which indicates formation of silver nanoparticles which is further characterised by using analytical techniques.
Status of Patent: Indian Patent Pending No.1649/MUM/2012 Click here

Sugar Free Fruit Composition Having Microbiologically Effective Amount of Zinc Oxide Nano Particles as Preservative

Invention relates to a method for Synthesis of ZnO nanoparticles by precipitation method is provided, ZnO nanoparticles, a 0.45 M aqueous solution of zinc nitrate (Zn (N03)2.4H20) and 0.9 M aqueous solution of sodium hydroxide (NaOH) are prepared in distilled water. Then, the beaker containing NaOH solution is heated at the temperature of about 55°C. The Zn (N03)2 solutions are added drop wise to the above heated solution under high speed stirring. The beaker is sealed at this condition for 2 h. The precipitated ZnO nanoparticles are cleaned with deionized water and ethanol and then dried in air atmosphere at about 60°C. In a most important aspect of the invention fruit jam comprising zinc oxide nanoparticles is prepared, without addition of sugar as an sweeting agent or as a preservative, which is being completely replaced by the ZnO nanoparticles. In another aspect of the invention, a method for the preparation of sugar free fruit jam containing ZnO is provided.
Status of Patent: Indian Patent Pending No.2146/MUM/2013 Click here

Zinc Oxide Nano-Particles Synthesized Using Electro-Platng Waste

Invention relates to a process for preparing Nano-particles from ZnO is provided, the process involves co-precipitation method. 0.02 M aqueous solution of zinc acetate di-hydrate is put into 100 ml of distilled water under vigorous stirring. After 10 min stirring, 3mLof Electroplating waste was added to the above solution. After addition of extract, 2.0 M aqueous sodium hydroxide solution is introduced into the above aqueous solution drop wise, resulting in a white aqueous solution at pH 12, which is then placed on magnetic stirrer for 2 hrs. The precipitate is then taken out and washed repeatedly with distilled water followed by ethanol to remove the impurities for the final products. Then a white powder is obtained after drying at 60 °C in vacuum oven overnight.
Status of Patent: Indian Patent Pending No.2147/MUM/2013 Click here

Preparation of Zno Nanoparticles by Co-Precipitation Method Using Black Tiger Prawns (Penaeus Monodon) Extract

Invention relates to a process for preparing Nanoparticles from ZnO is provided, the process involves co-precipitation method. 0.02 M aqueous solution of zinc acetate di-hydrate is put into 100 ml of distilled water under vigorous stirring. After 10 min stirring, 3mL-5ml of extract prepared from the prawn is added the above solution. After addition of extract, 2.0 M aqueous sodium hydroxide solution is introduced into the above aqueous solution drop wise, resulting in a white aqueous solution at pH 12, which is then placed on magnetic stirrer for 2 hr. The precipitate is then taken out and washed repeatedly with distilled water followed by ethanol to remove the impurities for the final products. Then a white powder is obtained after drying at 60 °C in vacuum oven overnight. In another aspect of the invention Characterization of ZnO is done by Transmission electron microscopy (TEM) and Scanning electron microscopy (SEM) and UV-Vis Spectrophotometer. Further, the ZnO nanoparticles prepared are studied for the Antibacterial activity of synthesized Zn Materials used for antimicrobial activity of zinc oxide nanoparticles are Nutrient agar slants, petriplates, Cork borer, zinc oxide nanoparticle sample, Salmonella typhi, salmonella paratyphi A and Salmonella paratyphi B. Agar diffusion method is used for antimicrobial activity of zinc oxide nanoparticles.
Status of Patent: Indian Patent Pending No.2422/MUM/2013 Click here

Vaginal Cream For Controlling Microbial Infections

Invention relates to a process for extracting from a part of a variety of the walnut species J. regia L. a biologically active extract comprising treating the part with an aqueous solvent under extracting conditions and for a sufficient period of time to extract from the part an aqueous solution which contains in dissolved form the extract, wherein the variety of J. regia L. is selected from the group consisting of walnut trees. The present invention also provides silver nanoparticles coated with the biologically active compounds isolated from the epicarp of the fruit of the J. regia thereof as composition having lubricants and surfactants; The invention provides a method for coating silver nanoparticles with the biologically active compounds or bioactive compounds , wherein the silver nanoparticles acts as a carrier to the bioactive or drug substances for target delivery for treatment of the cervical cancer or antibacterial diseases.
Status of Patent: Indian Patent Pending No.2616/MUM/2011 Click here

Antimicrobial Sanitary Napkins

Invention relates to sanitary napkins having silver nanoparticles impregnated polymeric material is provided, it is known that silver has antimicrobial properties, the polymeric material on which silver nanoparticles or silver thin film is impregnated. The microbiologically effective amount of the silver is deposited or impregnated on the surface of the polymeric material in a the plurality of layers of the sanitary napkin.
Status of Patent: Indian Patent Pending No.1153/MUM/2010 Click here