Aluminum phosphate hydrate

Sodium aluminum phosphate hydrate SALP ILO Slow IDO... 

In this work the potential of biphasic synthesis mixtures for the synthesis of microporous silicoalumino-phosphates is investigated. The influence of emulsification of the synthesis mixture, agitation and temperature on the crystallization is studied. The structural identity of MCM-1 and A1P0.-H3, which is an aluminum phosphate hydrate that crystallizes in absence of template, is demonstrated. Special attention is paid to the mechanism of Si substitution in MCM-1, to its catalytic activity and its intracrystalline void structure. 

Characterization of AlPO -Hj and MCM-1. In 1961 d Yvoire reported on the synthesis of aluminum phosphate hydrates (6). AIPO4-H3 is of particular interest among these materials. Literature data on the XRD line positions and relative intensities for A1P04-H3 and MCM-1 are collected in Figure 6. The materials show identical XRD patterns and thus should have the same structure type. 

Conditions for A1PQ4-H3 and MCM-1 Synthesis. From previous section it cSh Be concluded that as far as the coordination of A1 is concerned, AlPC -EU is a hybrid between the aluminum phosphate hydrates like variscite and metavariscite and the aluminophosphate molecular sieves. It can be expected that the synthesis conditions under which it crystallizes will also be intermediate between those of hydrates and molecular sieves. Literature together with the present new data seem to confirm this. 

Recently, a novel type of binder for catalyst shaping has been identified that allows for tailoring of the pore-size distribution in a different way. The material is an amorphous aluminum phosphate hydrate (APH) available as a powder, which is employed like conventional binders, for instance, in extrusion. In contrast to conventional particulate binders, however, calcination at 500 °C transforms APH via water evaporation, viscous sintering, and a phase transition into a dense, crystalline phase with the structure of tridymite. 

Turquoise Hydrated copper aluminum phosphate Blue 2.7... 

Property Aluminum triphosphate (commercial product 1 K-White 82) [5.73] Aluminum triphosphate (commercial product 2 K-White 84) [5.73] Aluminum zinc phosphate hydrate (commercial product 3 Heucophos ZPA, Phosphinal PZ 04) [5.68], [5.70]... 

Calcined Aluminum Phosphate. Ores consisting mainly of hydrated aluminum phosphate minerals are useful for direct application after thermal treatment (calcination) at a controlled temperature. Calcination removes the combined water and destroys the crystallinity of the phosphate minerals, thereby improving the reactivity of the phosphate.3... 

Sodium Aluminum Phosphate, Acidic, occurs as a white powder. It is anhydrous or contains two or four molecules of water of hydration. It is insoluble in water, but is soluble in hydrochloric acid. 

Aluminum phosphate adjuvant is stable for at least six months when stored at 4-30°C in well-sealed inert containers. It must not be allowed to freeze as the hydrated colloid structure will be irreversibly damaged. 

Figure 10.12. AI solid-state NMR chemical shift data from a fresh Pd-only catalyst and from inlet, middle, and outlet sections of a high-mileage taxi-cab aged catalyst of the same formulation. Note the strong feature at 40 ppm in the vehicle-aged catalyst corresponding to hydrated aluminum phosphate. The broad features near 5 and 60 ppm are associated with octahedrally and tetrahedrally coordinated aluminum cations in the alumina washcoat. [30]...

Under oxidized conditions in mineral wetland soils, the coating of hydrated ferric oxides on silt or clay particles have occluded in them several forms of phosphate including ferric phosphate, aluminum phosphate, and calcium phosphate (Figure 9.32). As a result of anaerobic conditions, reduction of hydrated ferric oxide to more soluble ferrous hydroxide results in the release of these occluded phosphates. Calcium phosphate released in this manner is available to wetland plants, whereas the occluded ferric phosphate is probably not available to the plants until it has been reduced to more soluble ferrous phosphate. 

Chem. Descrip. Aluminum-zinc phosphate hydrate Chem. Analysis 55.5% PO4,39% Zn, 4.5% Al Uses Corrosion inhibitor, pigment for coatings Features Versatile use in a wide range of vehicles Properties Wh. 3 m avg. particle size 0.01% 32 m sieve residue dens. 2.8 g/ml bulk dens. 0.6 g/ml (tapped) oil absorp. 40 pH 6 Toxicology Nontoxic Heucophos ZPO [Heucotech Ltd]... 

Aluminum oxide Aluminum oxide (2 3). See Alumina Aluminum oxide hydrate. SeeAluminum hydroxide Aluminum oxide silicate. SeeAluminum silicate Aluminum phosphate Aluminum phosphate tribasic. SeeAluminum orthophosphate... 

Aluminum-zinc phosphate hydrate, Zinc siiicophosphate... 

Conversion of ethylene to ethanol was observed over zirconium or aluminum phosphate catalysts impregnated with phosphoric acid, and the activities are slightly better than that of phosphoric acid on silica, the industrial catalyst for ethylene hydration. The active species for this transformation was identified to be liquid phosphoric acid present on the catalyst (150). 

XPS was used to determine the surface composition of the anodized aluminum substrate during exposure to warm, moist environments. The information obtained was used to construct surface behavior diagrams that showed that hydration of the surface involved three steps [38]. Step one, which was reversible, consisted of adsorption of water onto the AIPO4 monolayer. The second step, which was rate-controlling, involves dissolution of the phosphate followed by rapid hydration... 

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