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In normal water, about 1 molecule in 3,200 is HDO (1 H 2 HO) (one hydrogen in 6,400 is 2 H). By comparison, heavy water D 2 O or 2 H 2 O [4] occurs at a proportion of about 1 molecule in 41 million (i.e., 1 in 6,400 2). This makes semiheavy water far more common than "normal" heavy water.
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Hydrodeoxygenation (HDO) is a hydrogenolysis process for removing oxygen from oxygen-containing compounds. Typical HDO catalysts commonly are sulfided nickel-molybdenum or cobalt-molybdenum on gamma alumina. An idealized reaction is: [1] + + The first review on HDO was published in 1983. [2]
H in its hydrogen, is actually about 50% HDO and 25% each of H 2 O and D 2 O, in dynamic equilibrium. In normal water, about 1 molecule in 3,200 is HDO (one hydrogen in 6,400 is 2 H), and heavy water molecules (D 2 O) only occur in a proportion of about 1 molecule in 41 million (i.e. one in 6,400 2) [citation needed]. Thus semiheavy water ...
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HDO may refer to: Hispanic Democratic Organization, United States, a PAC; Hydrodeoxygenation, removing oxygen from compounds; Semiheavy water, replacing hydrogen-1 ...