Zinc oxide synthesizing

Tsvigunov, A.N., A new modification of zinc oxide synthesized by the hydrothermal method. Glass Ceram., 58, 280, 2001. 

Methyl ethyl ketone may also he produced hy the catalyzed dehydrogenation of sec-hutanol over zinc oxide or brass at about 500°C. The yield from this process is approximately 95%. MEK is used mainly as a solvent in vinyl and acrylic coatings, in nitrocellulose lacquers, and in adhesives. It is a selective solvent in dewaxing lubricating oils where it dissolves the oil and leaves out the wax. MEK is also used to synthesize various compounds such as methyl ethyl ketone peroxide, a polymerization catalyst used to form acrylic and polyester polymers and methyl pentynol by reacting with acetylene ... 

Two series of catalysts were synthesized for subsequent evaluation as methane dimerization catalysts. The first series was alkali modified zinc oxide (6) and magnesium oxide catalysts (7), which were reported to be active for methane activation, while the second series was ion modified perovskites described by Machida and Enyo (8). The objective of the present study was to determine whether the aerosol technique could provide a wide range of ion substitutions as homogeneous solid solutions, and to determine whether moderately high surface area catalysts could... 

Zinc oxide is used as a catalyst in organic syntheses (e.g., of methanol), often in conjunction with other oxides. It is present in some adhesive compositions. 

Since these early studies, a variety of other heterogeneous catalyst, have been reported to promote the copolymerization of PO and C02, with the most active of these being air-stable zinc derivatives of dicarboxylic acid [10, 11]. These catalysts are readily synthesized by the reaction of zinc hydroxide or zinc oxide with dicarboxylic acids in toluene. Recently, the crystal structure of zinc glutarate has been determined from its powder pattern of polycrystalline material [12] or single crystals [13], and shown to be a layered structure of zinc ions with bridging dicar-boxylates between the layers (see Figure 8.1). 

This alcohol can be reacted with methanol in the presence of a catalyst to produce methyl-r-butyl ether. Although it is currently cheaper to make Ao-butyl alcohol from Ao-butcne (Ao-butylene), it can be synthesized from syngas with alkali-promoted zinc oxide catalysts at temperatures above 400°C (750°F). 

A seed-assisted chemical reaction at 368 K is found to yield uniform, straight, thin single-crystalline ZnO nanorods on a hectogram scale,181 Zinc oxide nanowires have been synthesized in large quantities using plasma synthesis.1 Variable-aspect-ratio,... 

Zinc acetate is synthesized by reacting zinc oxide with glacial acetic acid, with subsequent crystallization, separation by centrifugation, and drying and milling of the crystals. No organic solvents are used during the synthesis. 

The growth of zinc-oxide nanoparticles from norborene-based block copolymers was demonstrated by Kofinas et al.78 The block copolymer consisted of polynorborene and poly(norborene dicarboxylic acid) (block-size ratio = 400 50) was synthesized by ROMP (Scheme 5.7).78 In a tetrahydrofuran (THF) solution, ZnCl2 was introduced into the dicarboxylic acid units and the resulting Zn2+-containing block film exhibited spherical domains... 

Methyl alcohol occurs naturally in plants and animals, including humans, as the product of metabolic reactions that occur in all organisms. It also occurs in the atmosphere as the result of the decomposition of dead organisms in the soil. None of these sources is utilized for the commercial production of methyl alcohol. Instead, the primary method for the preparation of methyl alcohol is to react carbon monoxide with water at a temperature of about 25o°C (48o°F) and pressures of 50 to 100 atmospheres over a mixed catalyst of copper, zinc oxide, and aluminum oxide. Efforts are being made to develop other methods of synthesizing methyl alcohol. In one process, for... 

The crystallinity of the formed particle is, in any case, determined by thermodynamic and kinetic parameters. Leite and coworkers [252,253] recently demonstrated that well-crystallized Sn02 nanocrystals could be produced at room temperature with no hydrothermal treatment. This process is based on the hydrolysis of SnCh in an ethanol solution, followed by dialysis to remove the Cl ions. The result of this dialysis is a transparent colloidal suspension formed by near-spheric particles, as illustrated in Fig. 9 later. Zinc Oxide (ZnO) nanocrystals have also been synthesized at room temperature. The process developed by Bahnemann et al. [67] consists of hydrolyzing zinc acetate dihydrate dissolved in 2-propanol by the addition of NaOH... 

PROPERTIES OF ZINC OXIDE NANOPOWDERS SYNTHESIZED BY ELECTRICAL DISCHARGE IN LIQUID TECHNIQUE... 

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