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Efficiency of chemical desiccants
Silica gel Silica gel was obtained from the Eagle Chemical Company, Inc. Sodium hydroxide Fischer Scientific Company sodium hydroxide pellets were used. Moisture monitor A Consolidated Electrodynamics Corporation Moisture Monitor, Type 26-302, was used. Wet test meter Precision Scientific Company wet test meters were used to measure the gas flow.
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THE SOLAR KETTLE-THERMOS FLASK: A COST EFFECTIVE
Being vacuum insulated, the SK-TF doubles up as a vacuum flask, delivering stored solar heated water in the morning before the sun is up. With a high stagnation temperature of more than 220C, the SK-TF can also be used for other heating purposes e.g. an oven or autoclave. Powered solely by free solar energy, the SK-TF could
Desiccants: Technical Data
1) multi-layer adsorption, which is the attraction of thin layers of water molecules to the surface of the desiccant. Because the desiccant is very porous, the surface area is high and significant amounts of water can be attracted and adsorbed;
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Granular Applications: Given its high affinity for water, sSORB granular white silica gel is used: in the gas industry to dry natural gas, as a desiccant in packaging (silica packets), for protecting cargo, electronics, vitamins, pharmaceuticals, foodstuffs. and also in compressed air dryers.
Desiccant. Silica gel is also used to dry the air in industrial compressed air systems. Air from the compressor discharge flows through a bed of silica gel beads. The silica gel adsorbs moisture from the air, preventing damage at the point of use of the compressed air due to condensation or moisture.
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Start studying Kaplan MCAT OChem Ch. 12: Purification and Separation. Learn vocabulary, terms, and more with flashcards, games, and other study tools. need specific flask w/ valve that attaches vacuum (Buchner/vacuum flask) vacuum filtration adsorbent is either a piece of paper or a thin layer of silica gel or alumina adhered to an
picoSpin™ 80: Microscale Friedel-Crafts Acylation of
pockets and gaps. Two methods for column packing are used: dry packing and slurry packing. In dry packing, the adsorbent, silica gel or alumina, is added directly to the column and ‘tapped’ into place to remove cracks, gaps and air pockets, then the first eluting solvent is added to wet the column.
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pockets and gaps. Two methods for column packing are used: dry packing and slurry packing. In dry packing, the adsorbent, silica gel or alumina, is added directly to the column and ‘tapped’ into place to remove cracks, gaps and air pockets, then the first eluting solvent is added to wet the column. With slurry packing, a slurry mixture of
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flask, two drying tubes filled with silica gel, a manifold system containing a water trap 5 2. maintained at liquid-nitrogen temperature, a 0 to 25 psia (0 to 1.72XlO N/m abs) pres- sure transducer, and two gas-collection countjng vials filled with activated charcoal and maintained at liquid-nitrogen temperature.
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• Vacuum source • Drying oven • Analytical balance • Desiccator • Vacuum flasks • Gooches or filter supports • Pipets & graduated cylinders • Filter paper (934 AH) Chemicals • Quality Control standard –
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Cryogenic storage dewars are specialized vacuum flasks that hold liquid nitrogen or liquid helium (cryogens). Choosing the right dewar that best suits your application is critical. A liquid nitrogen dewar
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Vacuum trap system protects gauge heads, like our 14034, and pumps from corrosive vapors and particle fouling. System consists of a Dewar flask, cold trap and inlet arm. High-vacuum stopcocks are used
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EXTRACTION AND PURIFICATION OF CAFFEINE
Use a Pasteur pipet to transfer about two drops of this solution of crude caffeine to the first of 3 clean tiny (smallest available) test tubes for later analysis by thin-layer chromatography (TLC), and the rest to a clean 125 mL vacuum flask. Seal this flask
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How to Protect Your HPLC Column and Prolong Its Life into a vacuum flask. A filtered, degassed mobile phase may reacquire particles from the air, through interaction with the reservoir, or through slow High pH Mobile Phases Silica
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In labs, Dewar flasks are used for cryogenic storage and other processes requiring an extremely low temperature. This insulated flask is available in various shapes and volume capacities. Look for Dewar flasks that feature high performance construction and advanced insulation materials to ensure high thermal efficiency.
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vacuum coffee saver with pump, 1.3l Light and air can have harmful effects on many food items, such as coffee and tea. This Coffee Saver container comes with a pump to remove air, while the container
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Vacuum flasks are generally made of hard glass, usually Equipped with intake valve and vacuum gauge, reusable. 18.104.22.168 Sampling Preparation Before sampling, the vacuum tank (bottle) should be cleaned or heated to clean 3 to 5 times, then vacuum, the vacuum
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al., 1993) was used to determine the WVP of films. The test cups were filled with 20 g of silica gel (desiccant) to produce a 0% RH below the film. A sample was placed in between the cup and the ring cover of each cup coated with silicone sealant (high vacuum
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