barium hydroxide is a white or colorless, poisonous powder or crystalline substance, Ba(OH)2, used for example, in the saponification of fats and the fusing of silicates. Barium hydroxide forms a strong caustic base in aqueous solution. It has many uses, e.g., as a test for sulfides; in...
(Ba), a step of preparing a titanium (Ti) raw material dispersed within an acid or base, a step of obtaining a barium titanate seed by mixing and reacting the barium hydroxide and titanium raw material, and a step of growing grains by mixing the barium titanate seed with pure water and...
(22, R = PhNH), and assuming that ψ-opianic acid behaves in the same way, berberal, which may be obtained from the amino-acid (13) and ψ-opianic acid, may be assigned the structure (23), from which the structures (24) and (25) for the pseudo-base and quaternary hydroxide ...
Efficient Wittig–Horner synthesis of acyclic α-enones with an asymmetric carbon at the γ-position using barium hydroxide β-Monosubstituted acylic α-enones with an asymmetric carbon at the γ-position: (E)-(5RS)-5-phenylhex-3-en-2-one, (4a), (E)-(6RS)-2,2-dimethyl-6-phenylhe.....
Barium chloride can be prepared from barium hydroxide or barium carbonate, the latter being found naturally as the mineral “Witherite”. These basic salts react to give hydrated barium chloride. On an industrial scale, it is prepared via a two-step process from the mineral “Baryte”: ...
Barium chloride can be prepared from barium hydroxide or barium carbonate, the latter being found naturally as the mineral “Witherite”. These basic salts react to give hydrated barium chloride. On an industrial scale, it is prepared via a two-step process from the mineral “Baryte”: ...
Barium oxide/phenol or substituted phenol catalyzed ethoxylation Cresylic acid (phenol or alkylated phenols) is used to promote barium oxide or hydroxide which is used as an ethoxylation catalyst for the reaction of ethylene oxide and alkanols of all classes. The reaction is carried out at tempera...
athis reaction is believed to proceed according to lewis acid-lewis base interaction in which the aluminum atom with its vacant orbital plays role of the acid and the alcohol the role of the base,22,which generates the carbonium ion intermediate,22. 正在翻译,请等待... [translate] a我做完...
Medical Encyclopedia n (Elements & Compounds) a white insoluble fine dense powder, used as a pigment, as a filler for paper, rubber, etc, and in barium meals. Formula: BaSO4. Also called:blanc fixe Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Pu...
Metallic barium is used for removal of residual gas in vacuum tubes and in alloys with nickel, lead, calcium, magnesium, sodium, and lithium. Barium compounds are used in the manufacture of lithopone (a white pigment in paints), chlorine, sodium hydroxide, valves, and green flares; in synthe...