14863 green chemistry

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Information about 14863 green chemistry

Published on March 15, 2014

Author: pradyumnagujjar7

Source: slideshare.net

Green Chemistry

Econoburette • Semimicro volumetric Econoburette (SMVE) is an economized, risk free and green chemistry instrument, which performs valuable titration with microlitre of substances. • IT is an inbuilt pipette performing functions of the pipette and conical flask • The micro level amount of titer and titrant consume less time in performing a volumetric titration and prevents more use of materials • Econoburette is found superior and advantageous for volumetric analysis over conventional burette. If it is used at a mass level, it would save environment from being polluted. Its fabrication, handling and operation are easy and it is useful for industries and educational institutions. It avoids pipetting of a liquid with mouth because sometimes the liquid to be sucked goes inside the body via mouth. Even if a user takes much precaution to avoid an entry of a liquid to user’s mouth the dangerous fumes are certain to enter the body due to direction of a force to suck a sample. Such fumes are poisonous for growing children • The econoburette also facilitates the titration of volatile liquids, thus it is very useful for chemistry laboratories.

• It is a green titration device for school, college, university and R & D centers.

By: Dr. Ashish Kumar Surivsmeter •Survismeter, a single apparatus,used for viscosity, ST, interfacial tension thus discarding viscosmeter and stalagmomter for viscosity and surface tension, interfacial tension study. • individually, wetting coefficient, viscosity, molecular weight, solvent binding capacity of proteins, architectural molecules, friccohesity can also be measured •It works on theory of R4M4 (Reduce, Reuse, Recycle, Redesign, Multipurpose, Multidimensional, Multifaceting and Multitracking) of materials and methods with highly précised and accurate experimental results along 100% inhibition of polluting discharges in experimental determinations. •It saves electricity, water, manpower, chemicals, laboratory infrastructure, glass materials, glassblowing gases LPG, oxygen •The survismeter is most excellent model for study of Liquid-Liquid Interfaces (LLI) of two immiscible solvents. •It is safe in handling, sample loading with no hazards and no discharge of polluting fumes/materials. It occupies minimum laboratory infrastructure. •The Survismeter has reduced resources including support materials like glass, blowing gases, manpower, laboratory space, electricity, water, chemicals, by 97%.

By: Dr. Ashish Kumar http://www.yourepeat.com/watch/?v=w0Fu7p74QEc http://www.authorstream.com/Presentation/Maktedar-1385959-survismeter-slide/ Application Areas Some of the major fields where our device is highly applied are enlisted below: •Pharmacy •Chemistry •Biochemical Engineering •Biophysical Courses •Cosmetics •Inks •Fuel •Petroleum PolymersDrug Design Paper Pulp Soaps and Detergents Pesticides Insecticides

By: Dr. Ashish Kumar Alternative Green Procedures for Organic Qualitative Analysis - Detection of N, S, Cl, Br, I In the present practice, the use of metallic sodium for fusion with organic compound is terribly hazardous and is a cause of great worry and concern in a student laboratory. The idea of fusion with sodium metal is to convert the water insoluble organically bound extra elements to water-soluble sodium salts which can be easily detected by various tests. Na + CN--------- CN Na +S -------Na2S Na +X -------NaX (X = Cl/Br/I)

By: Dr. Ashish Kumar A non hazardous and safe procedure: Use of zinc and sodium carbonate instead of metallic sodium Organic sample (about 50 mg) is thoroughly mixed with an intimate mixture of Zn dust (200 mg) and Na2CO3 (300 mg) powder in a fusion tube, heated first gently and then strongly in the flame till it becomes red hot and kept at red-hot condition for two minutes. The bottom part of the fusion tube is plunged into 5 ml of distilled water taken in a mortar, ground well with the pestle and filtered. With the filtrate tests for S, N and Cl / Br / I are carried out as usual as in the case of Lassaigne’s Test. 1.The fusion tube must be heated VERY STRONGLY, KEEPING AT RED HOT CONDITION THROUGHOUT FOR AT LEAST TWO MINUTES. If not properly heated, fusion is not properly done (as in case of sodium also), and thus expected observation (colour change) may not be made. In that case, it is advised to repeat the fusion. 2. The amount of water taken in the mortar must be within 5 ml.; otherwise, the solution will be too dilute to respond to tests, described below. 3. While carrying out the test for nitrogen, ferrous sulphate crystals are to be added; not the solution. This is to avoid excessive dilution. 4. Acidification must be carried out with dilute sulfuric acid, not with HCl. 5. No ferric chloride should be added.

By: Dr. Ashish Kumar S. No Experiment Observation Inference 1 0.5 ml filtrate + FeSO4 crystal heat + dil. H2SO4 Prussian blue color N present 2 a) 0.5 ml filtrate + Sodium nitroprusside Violet color S present b) filtrate + dil acetic acid + Lead acetate Black ppt S present 3 filtrate + FeCl3 Blood red N+S both present 4 filtrate + 2 drops Conc HNO3 boil cool + AgNO3 Curdy white ppt (Soluble in NH4OH) Pale yellow ppt (Partly soluble in NH4OH) Yellow ppt (Insoluble in NH4OH) Chlorine present Bromine present Iodine present Green context: • This experiment totally eliminates the risk of explosion and fire hazard which are often met whil carrying out the same experiments using metallic sodium. • The aforesaid zinc-alkali mixture (prepared by intimately mixing 2 parts by weight of zinc dust and 3 parts by weight of sodium carbonate can be stored in a stoppered bottle for more than a month.

Life cycle assessment (Cradle to grave approach)

By: Dr. Ashish Kumar Life-cycle assessment (LCA, also known as life-cycle analysis, ecobalance, and cradle-to- grave analysis) is a technique to assess environmental impacts associated with all the stages of a product's life from-cradle-to-grave. The concept of LCA is to evaluate the environmental effects associated with any given activity from the initial gathering of raw material from the earth, processing, manufacture, distribution, use, repair and maintenance, and disposal or recycling until the point at which all residuals are returned to the earth

• For example, trees produce paper, which can be recycled into low-energy production cellulose (fiberised paper) insulation, then used as an energy-saving device in the ceiling of a home for 40 years, saving 2,000 times the fossil-fuel energy used in its production. After 40 years the cellulose fibers are replaced and the old fibers are disposed of, possibly incinerated. All inputs and outputs are considered for all the phases of the life cycle.

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