Cupric silicates

Details for carrying out lecture demonstrations of (a) dyeing a mixed fabric blue and yellow simultaneously from the same bath, and (b) separating, by flotation, red mercuric sulfide, followed by green cupric silicate from their mixture with sand, will be found in the first four editions of this book. The degree of selectivity shown, in chromatography, by cellulose, alumina, and silica also lends itself to demonstrations. 

Attempted catalysis. A number of experiments were carried out to test the possible catalytic activity of substances such as potassium carbonate, cupric carbonate, ammonium chloride, ammonium sulfate, potassium silicate, boron phosphate, and silica gel, but in no case was there any indication that the reaction could be catalyzed. 

Shell Chlorine Process. The Shell process produces Q0 from the HQ using air or 02 in the presence of cupric and other clilorides on a silicate carrier (71). The reaction proceeds at an optimal rate in the temperature range of 430—475°C at an efficiency of 60—70%. A manufacturing unit was built by Shell in the Netherlands (41,000 t/yr) and another in India (27,000 t/yr). Both plants have been closed down. 

Inorganic copper compounds include cuprous oxide cupric oxide copper hydroxide copper carbonate basic copper ammonium carbonate copper acetate copper sulfate copper sulfate, tribasic (Bordeau Mixture) copper oxychloride copper silicate copper lime dust and copper potassium sulfide. Figure 5.10 shows a package of Kocide 101, copper containing products. 

A. Poppl, M. Newhouse, and L.E. Kevan, Electron Spin Resonance and Electron Spin Echo Modulation Studies of Cupric Ion Ion-exchanged into Siliceous MCM-41. J. Phys. Chem., 1995, 99, 10019-10023. 

Copper occurs in soil solids and solutions almost exclusively as the divalent cation Cu ". However, reduction of Cu " (cupric) to Cu (cuprous) and Cu (metallic copper) is possible under reducing conditions, especially if halide or sulfide ions ( soft bases) are present to stabilize Cu" (a soft acid). Copper is classified as a chalcophile, owing to its tendency to associate with sulfide in the very insoluble minerals, CU2S and CuS. In reduced soils, then, copper has very low mobility. Most of the colloidal material of soils (oxides of Mn, Al, and Fe, silicate clays, and humus) adsorb strongly, and increasingly so as the pH is raised. For soils with high Cu accumula-... 

In the present work two syntheses for litidionite have been developed which are straightforward and require only simple apparatus. In one a sodium-potassixam-copper silicate glass is made and then devitrlfled over a period of weeks at approximately 765 C. In the other a mixture of sodium carbonate, potassium carbonate, cupric oxide, silicon dioxide, again with a Na K Cu Si ratio of 1 1 1 4, is sintered at approximately 765 C for a number of days. 

Baryta white. See Barium sulfate Baryta yellow. See Barium chromate Barytes. See Barium sulfate Basic bismuth chloride. See Bismuth oxychloride Basic copper sulfate. See Cupric sulfate anhydrous Basic lead silica chromate. See Lead silicochromate Basic lead white silicate. See Lead silicate Basic zinc chromate. See Zinc chromate Battery acid. See Sulfuric acid... 

CS-100. See Dimethicone CS-420. See Silicone emulsion CS-922. See Calcium sodium caseinate CSA. See Chlorosulfuric acid CSC. See 4-Cyanobenzenesulfonyl chloride CSE-6000 Series. See Epoxy resin CSet. See Starch CS Film. See Polyethylene CS gas. See o-Chlorobenzylidene malononitrile CSM. See Polyethylene, chlorosulfonated C Sodium Silicate. See Sodium silicate CSorbidex C CSorbidex NC] CSorbidex P, CSorbidex S. See Sorbitol CSP. See Cupric sulfate pentahydrate CSPE. See Polyethylene, chlorosulfonated CStabiTex 06301] CStabiTex 06305] CStabiTex 06307. See Food starch, modified CStabiTex-lnstnat 12631] CStabiTex-lnstnat 12632. See Starch, pregelatinized CSX-240. See Carbon black CT-58. See Zinc phosphate CT-62. See Zinc chloride CT-70. See Sodium silicate CT-708 Potable Water Treatment. See Sodium hexametaphosphate CT-781] CT-788. See Zinc phosphate CTA. See 4-(Methylthio) benzonitrile CTA. See 2-Ethylhexyl thioglycolate... 

Konservan ZS. See Carbendazim Konut See Coconut (Cocos nucifera) oil KOP 300. See Cupric sulfate anhydrous KOP -Hydroxide. See Copper hydroxide (ic) KOP OXY-85. See Copper oxychloride Korad A. See Acrylates copolymer Korad Klear. See Acrylic resin Korad. See Acrylates copolymer Koraid PSM. See Aluminum silicate Koralone 500. See 2-n-Octyl-4-isothiazolin-3-one... 

The latter experiments considered a special case of dehvery-controlled tube growth, namely the injection of buoyant cupric sulfate solution into a denser solution of silicate. Clearly, this density difference can be reversed. For the injection of denser cupric sulfate solution into hghter sihcate solution, tube growth occurs in downward direction. In addition, we can consider the injection of sihcate into cupric sulfate solution. If we again consider different density relations, these combinations total to four distinctly different experimental scenarios. 

Figure 11.4 Image sequences of tube growth in the popping (a-h), jetting (i-l), and budding (m-p) regimes. In all experiments, aqueous cupric sulfate solution is injected into sodium silicate solution (100ml, 1 M in Si, 25°C). Injection is carried out with a syringe pump at constant flow rate (here 7.0 ml h ) through...

Figure 11.5 Image sequences illustrating four reverse growth regimes observed for the injection of sodium silicate (l.OM) into cupric sulfate solution. The growth regimes are referred to as (a) jetting (b) popping, (c) budding, and (d) fracturing. Flow rates, cupric sulfate concentrations, and density differences are (a) 50.0 ml h ...

We now discuss that in the jetting regime radius selection is dominated by simple hydrodynamics [46]. We assume that the shear stress and the velocity difference across the membrane can be neglected. For the analysis of the hydrodynamic flow profile, we can hence focus on the fluid motion inside and outside of the tube. In the experiments shown in Figure 11.10, the outer silicate solution is confined to a glass cylinder of radius J cyi(l-1 cm)- Along its central axis, buoyant cupric sulfate solution ascends as a cyHndrical jet of radius R. The cylindrically symmetric velocity fields v(r), which solve the Navier-Stokes equations, are... 

Salts Ammoniimi Fluoride (etchants) Boron trichloride Chromium trioxide Cupric nitrate Ferrous sulfate Tetraethyleortho silicate Trimethyl borate Timgsten hexafluoride... 

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