saturation hydrogenation

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• SATURATION (chimie organique) — SATURATION, chimie organique Processus de transformation des liaisons multiples d’une molécule en liaisons simples. Les réactions d’addition se produisent donc sur des liaisons multiples. Les liaisons 神 sont moins solides que les liaisons 靖 et… …   Encyclopédie Universelle

• Hydrogenation — |date=1996|location=Washington, D.C.|pages=429|id=ISBN 0 8412 3344 6] Because of the importance of hydrogen, many related reactions have been developed for its use. Most hydrogenations use gaseous hydrogen (H2), but some involve the alternative… …   Wikipedia

• hydrogenation — Chemical reaction between molecular hydrogen (H2) and another element or a compound, usually in the presence of a catalyst. It may involve adding hydrogen at the sites of double or triple bonds (see bonding) to make them single bonds (i.e., to… …   Universalium

• saturation — /sach euh ray sheuhn/, n. 1. the act or process of saturating. 2. the state of being saturated. 3. Meteorol. a condition in the atmosphere corresponding to 100 percent relative humidity. 4. the degree of chroma or purity of a color; the degree of …   Universalium

• saturation — noun Date: circa 1554 1. a. the act of saturating ; the state of being saturated b. satiety, surfeit 2. conversion of an unsaturated to a saturated chemical compound (as by hydrogenation) 3. a state of maximum impregnation: as a. complete… …   New Collegiate Dictionary

• saturation — 1. Impregnation of one substance by another to the greatest possible extent. 2. Neutralization, as of an acid by an alkali. 3. That concentration of a dissolved substance that cannot be exceeded. 4. In optics, see saturated color. 5. Filling of… …   Medical dictionary

• Hydrodesulfurization — (HDS) is a catalytic chemical process widely used to remove sulfur (S) from natural gas and from refined petroleum products such as gasoline or petrol, jet fuel, kerosene, diesel fuel, and fuel oils.[1][2] The purpose of removing the sulfur is to …   Wikipedia

• Vegetable fats and oils — Vegetable oil redirects here. For other uses, see Vegetable oil (disambiguation). Plant oils Olive oil Types Vegetable fats (list) …   Wikipedia

• Trans fat — Types of fats in food Unsaturated fat Monounsaturated fat Polyunsaturated fat Trans fat Cis fat Omega fatty acids: ω−3 ω−6 ω−9 Saturated fat Interesterified fat See also Fatty acid …   Wikipedia

• AROMATICITÉ — Peu de notions sont aussi fondamentales et aussi souvent utilisées que celle d’aromaticité; cependant c’est une des moins claires et des plus difficiles à préciser. Elle tire son origine de faits chimiques qui font apparaître d’étroites parentés… …   Encyclopédie Universelle

• Histoire de la production d'hydrogène — L histoire de la production d hydrogène débute vraiment avec les expériences de Cavendish en 1766. Paracelse, le célèbre alchimiste qui vivait au seizième siècle, a entrevu le gaz ; un siècle plus tard, Robert Boyle parvint à le recueillir,… …   Wikipédia en Français