the phosphomolybdate anion, a well known heteropolymetalate of the Keggin structural class. Ammonium phosphomolybdate can be made by heating ammonium orthomolybdate...
4 KB (148 words) - 21:37, 18 August 2024
(NH4)6Mo7O24, usually encountered as the tetrahydrate Ammonium phosphomolybdate, (NH4)3PMo12O40 Ammonium tetrathiomolybdate, (NH4)2MoS4 this chemical is used...
588 bytes (75 words) - 21:42, 23 May 2022
by the formation of a bright yellow precipitate layer of ammonium phosphomolybdate. The appearance of the precipitate can be facilitated by gentle heating...
3 KB (291 words) - 21:40, 28 July 2024
boiled with concentrated HNO3 and then ammonium molybdate is added. A yellow precipitate (ammonium phosphomolybdate) indicates the presence of phosphorus...
5 KB (678 words) - 13:41, 14 December 2024
octahedral tungsten oxyanions surrounding a central phosphate group. Ammonium phosphomolybdate, [PMo12O40]3− anion, was reported in 1826. The isostructural phosphotungstate...
33 KB (3,456 words) - 15:00, 28 February 2025
type of polyoxometalate catalysts. The first α-Keggin anion, ammonium phosphomolybdate ([NH4]3[PMo12O40]), was first reported by Jöns Jakob Berzelius...
13 KB (1,642 words) - 11:16, 5 April 2025
first heteropoly molybdate and first heteropolymetallate, yellow ammonium phosphomolybdate, (NH4)3PMo12O40 was discovered by Berzelius in 1826. The phosphorus...
17 KB (2,195 words) - 18:17, 22 September 2023
use — Determination of total phosphorus(V) oxide content — Quinoline phosphomolybdate gravimetric method ISO 3358:1979 Sodium tripolyphosphate and sodium...
205 KB (28,951 words) - 23:36, 17 March 2025
inorganic phosphate and ammonium molybdate in sulfuric acid, a reaction could occur where the two substances react forming a phosphomolybdate complex ion, or...
12 KB (1,211 words) - 09:02, 6 May 2022
catalytic oxidation of propylene in the presence of ammonia and bismuth phosphomolybdate. However, until 1960 a key production process was addition of hydrogen...
107 KB (11,530 words) - 10:59, 14 May 2025
separated at this stage by treatment with hydrogen sulfide. Ammonium molybdate converts to ammonium dimolybdate, which is isolated as a solid. Heating this...
76 KB (8,650 words) - 15:32, 3 May 2025
separated by distillation. One of the first useful catalysts was bismuth phosphomolybdate (Bi9PMo12O52) supported on silica. Further improvements have since...
25 KB (2,296 words) - 07:01, 16 May 2025
polyoxometalates. Typical examples occur in the Keggin structure of the phosphomolybdate ion. Edge sharing is an effective means of reducing electrical charge...
18 KB (2,163 words) - 14:15, 13 August 2024
production of aluminium — Determination of phosphorus content — Reduced phosphomolybdate spectrophotometric method ISO 2830:1973 Cryolite, natural and artificial...
113 KB (15,687 words) - 15:56, 13 October 2024