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Method of Production

The following sources provide further information on the optical characteristics of gratings and their method of production. [Pg.458]

The derivatives are hydroxyethyl and hydroxypropyl cellulose. AH four derivatives find numerous appHcations and there are other reactants that can be added to ceUulose, including the mixed addition of reactants lea ding to adducts of commercial significance. In the commercial production of mixed ethers there are economic factors to consider that include the efficiency of adduct additions (ca 40%), waste product disposal, and the method of product recovery and drying on a commercial scale. The products produced by equation 2 require heat and produce NaCl, a corrosive by-product, with each mole of adduct added. These products are produced by a paste process and require corrosion-resistant production units. The oxirane additions (eq. 3) are exothermic, and with the explosive nature of the oxiranes, require a dispersion diluent in their synthesis (see Cellulose ethers). [Pg.314]

Other methods of production iaclude hydrolysis of glycolonittile [107-16 ] with an acid (eg, H PO or H2SO2) having a piC of about 1.5—2.5 at temperatures between 100—150°C glycolonittile produced by reaction of formaldehyde with hydrogen cyanide recovery from sugar juices and hydrolysis of monohalogenated acetic acid. None of these has been commercially and economically attractive. [Pg.516]

Surfa.ce, Any reaction between two powder particles starts on the surface. The amount of surface area compared to the volume of the particle is, therefore, an important factor in powder technology. The particle—surface configuration, whether it is smooth or contains sharp angles, is another. The particle surface area depends strongly on the method of production, as shown in Table 1. The method of production usually determines the particle shape. [Pg.180]

Principal terpene alcohol components of piae oils are a-terpiueol, y-terpiueol, P-terpiueol, a-fenchol, bomeol, terpiuen-l-ol, and terpiaen-4-ol. The ethers, 1,4- and 1,8-ciaeole, are also formed by cycli2ation of the p-v( enthane-1,4- and 1,8-diols. The bicycHc alcohols, a-fenchol [512-13-0] (61) and bomeol (62), are also formed by the Wagner-Meerweiu rearrangement of the piaanyl carbonium ion and subsequent hydration. Bomeol is i7(9-l,7,7-trimethylbicyclo[2.2.1]heptan-2-ol [507-70-0]. Many other components of piae oils are also found, depending on the source of the turpentine used and the method of production. [Pg.419]

Nonwoven fabrics are generally described by the method of production, eg, needle-punched or spun-bonded (120). ASTM D1117 discusses various physical properties to be deterrnined for nonwoven fabrics and the standard procedures used. [Pg.458]

Alternative methods of production include reduction of HO2 with magnesium, which yields TiO only. When titanium monoxide is heated in air at 150—200°C, titanium sesquioxide, Ti202, forms, and at 250—350°C, it changes to Ti O. ... [Pg.119]

Long before the concept of pH, influences of minerals in water were empirically demonstrated in the various methods of production of both malt and beer. Water with a large carbonate content, as found in Munich and Copenhagen, demands long-grown and highly dried malt together with slow... [Pg.17]

Many different values for room temperature mechanical properties can be found in the Hterature. The lack of agreement depends, no doubt, on the different mixtures of a and y phases of cobalt present in the material. This, on the other hand, depends on the impurities present, the method of production of the cobalt, and the treatment. [Pg.371]

Copper Hydroxide. Copper(II) hydroxide [20427-59-2] Cu(OH)2, produced by reaction of a copper salt solution and sodium hydroxide, is a blue, gelatinous, voluminous precipitate of limited stabiUty. The thermodynamically unstable copper hydroxide can be kiaetically stabilized by a suitable production method. Usually ammonia or phosphates ate iacorporated iato the hydroxide to produce a color-stable product. The ammonia processed copper hydroxide (16—19) is almost stoichiometric and copper content as high as 64% is not uncommon. The phosphate produced material (20,21) is lower ia copper (57—59%) and has a finer particle size and higher surface area than the ammonia processed hydroxide. Other methods of production generally rely on the formation of an iasoluble copper precursor prior to the formation of the hydroxide (22—26). [Pg.254]

Vapor grown carbon fiber (VGCF) is the descriptive name of a class of carbon fiber which is distinctively different from other types of carbon fiber in its method of production, its unique physical characteristics, and the prospect of low cost fabrication. Simply stated, this type of carbon fiber is synthesized from the pyrolysis of hydrocarbons or carbon monoxide in the gaseous state, in the presence of a catalyst in contrast to a melt-spinning process common to other types of carbon fiber. [Pg.139]

The standard requires the supplier to specify verification arrangements and the method of product release in the purchasing documents where it is proposed that purchased product is verified at the subcontractor s premises. [Pg.328]

How are your subcontractor verification requirements and methods of product release conveyed to subcontractors ... [Pg.331]

PCNTs are marketed commercially by Hyperion Catalyst International Inc. (Cambridge, Mass. USA), based on a patent [22] Graphite Fibrils. The method of production appears to be essentially the same as that used for Endo PCNTs. The material consists of MWCNTs, 10-20 nm in diameter and 10-12 j,m long, with ca. 10 coaxial layers within each tube. The tubes have hollow cores of ca., 2 nm diameter. The Brunauer-Emmett-Teller (BET) analysis characteristically shows a surface area of 250 m /g, true density 2.0 g/cm- and bulk density of less than 0.1 g/cm (95% void vol). [Pg.147]

Whatever the method of production, the product, NG. is still hazardous, and it is now being replaced by safer explosives. Increasingly, quanies now use explosives prepared at the point of use by mixing two nonexplosive ingredients. [Pg.373]

Hersteller, m. producer, maker, manufacturer. Herstellungi /. production, preparation, manufacture restoration, recovery. Herstellungs-mittelf n. restorative, -verfahren, n. method of production, manufacturing process. [Pg.211]

Despite higher dependence on energy in modern methods of production, agriculture is responsible for... [Pg.19]

Synthesis gas generally refers to a mixture of carbon monoxide and hydrogen. The ratio of hydrogen to carbon monoxide varies according to the type of feed, the method of production, and the end use of the gas. [Pg.121]

When the information is available, the Corrosion Guide provides detailed corrosion data on the preparation of various chemicals. For example, in the section on sulphuric acid, the corrosion rates for several alloys are given when used at various stages of an actual process involving that acid. In the section on phosphoric acid, cognisance of the method of production shows also the influence of the minor constituents as well as the major chemical on the corrosion of various materials. Nevertheless, it must be emphasised that even a book as comprehensive as the Corrosion Guide can only cover a limited number of all the possible chemicals used in practice. [Pg.405]

A simple and efficient method of production of A-methyl ureas, which avoids the use of methyl isocyanate, has been applied to 5//-dibenz[6,/]azepine (5)- 16.ios... [Pg.265]

Methods of product recovery are considered in detail in the BIOTOL text entitled Troduct Recovery in Bioprocess Technology. In this chapter we will briefly review the methods applicable to recovery of amino adds. [Pg.248]

Only Aspergillus niger is strongly amylolytic and capable of using foe starch in the effluent. Open lagoon systems operating at low pH, if effective, would be a cheaper method of production than aseptic bioreactors. [Pg.350]


See other pages where Method of Production is mentioned: [Pg.62]    [Pg.197]    [Pg.379]    [Pg.272]    [Pg.246]    [Pg.257]    [Pg.259]    [Pg.267]    [Pg.23]    [Pg.79]    [Pg.348]    [Pg.390]    [Pg.396]    [Pg.196]    [Pg.27]    [Pg.28]    [Pg.138]    [Pg.2035]    [Pg.1069]    [Pg.6]    [Pg.12]    [Pg.649]    [Pg.72]    [Pg.418]    [Pg.19]    [Pg.1047]    [Pg.667]    [Pg.663]    [Pg.63]   
See also in sourсe #XX -- [ Pg.313 ]




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