Silicates synthetic

Synthetic rubbers Synthetics Synthetic silicates Synthetic surfactants Synthetic tanning agents... 

J. Dacey and W. Pult2, Synthetic Silicate Products for the Rubberindusty, at the CL Meeting of the 147th Rubber Division, Philadelphia, Pa., Mery 2—5, 1995, American Chemical Society, Washington, D.C. 

The complete process for synthesizing such species using this approach would entail the acquisition of an appropriate natural silicate or the preparation of an appropriate synthetic silicate and then the conversion of this silicate into the alkyl silicate or organosiloxane by suitable substitution reactions. In terms of bond cleavage, this process could entail no destruction and reformation of framework silicon-oxygen bonds, and, in terms of oxidation number, it would entail no reduction and reoxidation of the silicon. 

In addition to these, there are many more polymers like phosphonitrichloride, stibnates, amorphous silicon dioxide, natural and synthetic silicates, etc. 

Figure 6.12 Miscibility gap in natural and synthetic silicate melts. Dots unmixing for a tholeiitic magma, based on model of Ghiorso et al. (1983). E FeO total iron as FeO.

Schreiber H. D. (1976). The experimental determination of redox states, properties, and distribution of Chromium in synthetic silicate phases and application to basalt petrogenesis. Ph.D. diss., University of Wisconsin. 

These results indicate that the mesoporous material OH-02-600 having exceptionally large pores was produced from the synthetic silicate-bearing hectorite H-02 by the intercalation of AMC3A cation and the removal of organic materials. 

Del Nero, M., Advocat, T., Jollivet, P. Bontems, G. 1999b. Sorption of neptunium (V) on an alteration gel of alumino-borosilicate glasses and on synthetic silicate gels. Proceedings 2nd International Symposium on Nuclear Fuel Cycle Safety Engineering Research Facility NUCEF 98, Hitachinaka, Ibaraki, Japan, 584-595. 

As noted in Section 3.1, Si—0 bonds gain high strength from the large electronegativity difference between Si and 0, while remaining covalent and thus directional. Consequently, —Si—0—Si—0— (polysiloxane) chains are very stable indeed. Furthermore, since Si is almost always tetravalent, branched Si—0 chains and, indeed, sheets and three-dimensional networks are common both in naturally occurring minerals and in synthetic silicates, many of which are of primary economic importance (Chapter 7). 

F. Lebrun L. Waterlot, GerP 1117014 (1961) CA 57, 1142(1962) [A mixt of NG 10, NaNOa 56, NH4CI 32.5, carboxymethyl cellulose 1, and a synthetic silicic acid (Hi-Sil 233) 0.5% gave a semigelatinous, stable expl safe against coal dust and mine gas]... 

Two varieties of synthetic silicates are used in ordn technology — Ca and Na silicates. These are presented below ... 

A common difficulty in these partition experiments, with the use of either natural or synthesized samples, is in achieving perfect separation of the melt from the crystal phase for determining the noble gas content. Even a very small amount of glass (melt) contamination in crystal would increase the partition coefficient considerably, since noble gasses are much more enriched in glass. To circumvent this difficulty, Broad-hurst et al. (1990, 1992) prepared natural minerals and synthetic silicate melts that... 

Ford, R. J. Hitchman, M. A. (1979) Single crystal electronic and EPR spectra of CaCuSi4O10, a synthetic silicate containing copper(II) in a four-coordinate planar ligand environment. Inorg. Chim. Acta, 33, L167-70. 

We worked with a variety of synthetic silicates and their modifications by various physical or chemical treatments or by various chemical additives. We particularly evaluated many synthetic hydrated calcium silicates, with and without additional treatments. These treatments included various organic and inorganic acid compounds, organic surface-active agents, and inorganic salts. We also studied samples dried to remove free moisture and/or some water of hydration. The modifications were selected to effect favorably the properties of the carriers. 

The data reported here were developed by evaluating these properties on the various synthetic silicates and their modifications that we... 

Previous work (7) provides precedents for the type of reaction required for framework conversion in the synthetic-silicate variation of the route. Likewise, previous work provides precedents for the metal ion and OH group displacement steps (8-10) and for the OR group displacement step (11-13) of both variations of the route. In addition, work has been reported recently (14) on another related route to organosilicon compounds. However, no work, other than that from this laboratory, has been reported that provides a precedent for the full route. 

In this chapter, a new example of the synthetic-silicate variation of the route is presented, and this variation and the available-silicate variation of the synthesis are discussed. 

CH3)ioSi607 (10), from Si02 by way of the synthetic silicate Na4Ca4Si60i8 has been reported previously (4-6). This synthesis provides another example of the synthetic-silicate variation of the substitution route. 

Use Floor polishes, paints, adhesives, paper coatings, catalyst supports, latex products, textile cleaning treatments, photosensitized paper, binder for inorganic fibrous materials, reactant for synthetic silicates. 

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