Petroleum refining glossary. 2013.
Brønsted acid site — An acid site on a catalyst where the acidic entity is an ionizable hydrogen. Familiar mineral acids such as sulfuric are also acids of this type, named for the physical chemist J. N. Brønsted. See also: Lewis acid site … Petroleum refining glossary
Lewis acid site — An acid site on a catalyst where the acidic entity is a positive ion (called a cation) such as Al3+ rather than an ionizable hydrogen. Named for the famed physical chemist G. N. Lewis. See: Brønsted acid site … Petroleum refining glossary
acid–base reaction — ▪ chemistry Introduction a type of chemical process typified by the exchange of one or more hydrogen ions, H+, between species that may be neutral (molecules, such as water, H2O; or acetic acid, CH3CO2H) or electrically charged (ions, such… … Universalium
Acid dissociation constant — Acetic acid, a weak acid, donates a proton (hydrogen ion, high … Wikipedia
Sucrose phosphorylase — (E.C. 2.4.1.7) is an important enzyme in the metabolism of sucrose and regulation of other metabolic intermediates. Sucrose phosphorylase is in the class of hexosyltransferases, a type of glycosyltransferase that catalyzes the transfer of a… … Wikipedia
Silica-alumina — is also known as alumino silicate(s). It is an oxide like combination of aluminium, silicon and oxygen, and it has a major component of kaolin and clays.When amorphous silica alumina is treated with strong acids such as hydrochloric and… … Wikipedia
Hydroxide — Lewis structure of the hydroxide ion showing three lone pairs on the oxygen atom … Wikipedia
Acidité — Potentiel hydrogène Pour les articles homonymes, voir PH. Le pH en phase aqueuse au quotidien : Substance pH approximatif Acide chlorhydrique molaire 0 Drainag … Wikipédia en Français
PH physiologique — Potentiel hydrogène Pour les articles homonymes, voir PH. Le pH en phase aqueuse au quotidien : Substance pH approximatif Acide chlorhydrique molaire 0 Drainag … Wikipédia en Français
Potentiel Hydrogène — Pour les articles homonymes, voir PH. Le pH en phase aqueuse au quotidien : Substance pH approximatif Acide chlorhydrique molaire 0 Drainag … Wikipédia en Français
