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an adsorber unit where solvent traces of an upstream acid gas scrubbing process (e.g. methanol, water), traces of carbon dioxide or other compounds are completely removed in a molecular sieve bed in order to avoid freezing [1] and subsequently blockage in the low temperature process which operates at temperatures down to 80 K (-193 °C or -315 ...
Sprayers range in size from man-portable units (typically backpacks with spray guns) to trailed sprayers that are connected to a tractor, to self-propelled units similar to tractors with boom mounts of 4–30 feet (1.2–9.1 m) up to 60–151 feet (18–46 m) in length depending on engineering design for tractor and land size.
The reduction of nitroaromatics is conducted on an industrial scale. [1] Many methods exist, such as: Catalytic hydrogenation using: Raney nickel [2] or palladium-on-carbon, [3] [4] [5] platinum(IV) oxide, or Urushibara nickel. [6] Iron in acidic media. [7] [8] [9] Sodium hydrosulfite [10] Sodium sulfide (or hydrogen sulfide and base ...
Most venturi systems operate with an L/G ratio of 0.4 to 1.3 L/m 3 (3 to 10 gal/1000 ft 3). [4] L/G ratios less than 0.4 L/m 3 (3 gal/1000 ft 3) are usually not sufficient to cover the throat, and adding more than 1.3 L/m 3 (10 gal/1000 ft 3) does not usually significantly improve particle collection efficiency.
Use of NaBH 4 can give any of these results, but InCl 3 or NiCl 2 catalyze specifically 1,4‑reductions. [1] Potassium or lithium tri(sec‑butyl)borohydride sometimes selects 1,4‑reductions, but can be stymied by steric hindrance. [20] Triphenylphosphinocopper hydride clusters directs catalytic hydrogenation to perform specifically ...
DTIs within the RCSC specification section 8.2.4 are described thus: "ASTM F959 direct tension indicators are recognized in this Specification as a bolt-tension-indicating device. Direct tension indicators are hardened washer shaped devices incorporating small arch-like protrusions on the bearing surface that are designed to deform in a ...