Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Productivity partial

Partially Processed Food Products. Partially processed food products have received more than minimal processing but stiU requite refrigeration. [Pg.448]

Poly(vinyl alcohol) is used as an additive to dry-wall joint cements and stucco finish compounds. Rapid cold-water solubiUty, which can be achieved with finely ground PVA, is important in many dry mixed products. Partially hydrolyzed grades are commercially available in fine-particle size under the name S-grades. The main purpose of the poly(vinyl alcohol) is to improve adhesion and act as a water-retention aid. [Pg.489]

Benzotrichloride is a chemical iatermediate used to produce two significant products. Partial hydrolysis or reaction with benzoic acid yields benzoyl chloride, whereas chlorination and subsequent reaction with hydrogen fluoride yields -chlorobenzotrifluoride [98-56-6]. [Pg.61]

When a unimolecular reaction occurs with an initial product partial pressure of the reactant A, to yield an amount of die product, jc, the first-order reaction rate equation reads... [Pg.52]

The log CLD method can sometimes provide better quality data than the conventional Mayo method. It is less sensitive to experimental noise and has application in measuring the transfer constant to polymeric species where the distributions of the transfer agent and the polymer product partially overlap.24... [Pg.284]

An intermediate acylnickel halide is first formed by oxidative addition of acyl halides to zero-valent nickel. This intermediate can attack unsaturated ligands with subsequent proton attack from water. It can give rise to benzyl- or benzoin-type coupling products, partially decarbonylate to give ketones, or react with organic halides to give ketones as well. Protonation of certain complexes can give aldehydes. Nickel chloride also acts as catalyst for Friedel-Crafts-type reactions. [Pg.222]

Fig. 1.36.2. Photographs of the virus suspension (Fig. 1.36.1.) by a cryomicroscope during slowly increased temperature left -40 °C, right -30 °C. In the right photo, bright inclusions in the dark lower zone can be seen. These represent partially molten product between the remaining ice. Water is also diffused into the already dried product, partially dissolving it (Fig. 8 from f 1.27]). Fig. 1.36.2. Photographs of the virus suspension (Fig. 1.36.1.) by a cryomicroscope during slowly increased temperature left -40 °C, right -30 °C. In the right photo, bright inclusions in the dark lower zone can be seen. These represent partially molten product between the remaining ice. Water is also diffused into the already dried product, partially dissolving it (Fig. 8 from f 1.27]).
Although the synthesis is completed in very few steps, oxidation of 1,4-xylene to the corresponding terephthalic acid does not afford a uniform product. Partial dihalogenation gives rise to side products. The condensation reaction requires two equivalents of arylamine per halogen atom. One equivalent is needed to neutralize the generated hydrohalogen acid, which is subsequently separated as aryl-amine-hydrohalide and recycled as hydrohalide and arylamine. [Pg.456]

The checkers found that the product partially decomposed when stored for a day at ambient temperature. Therefore it is recommended that the bromo acid be used immediately in the next step. [Pg.21]

For initial reaction rates r0 with a pure alcohol feed, all product partial pressures are zero, and pAO = yAO n, so that for the dual site... [Pg.106]

In this formulation, the reaction is assumed to be essentially irreversible the existence of product partial pressures in the numerator does not alter the method of analysis to be discussed here, however. Equation (83) may be written... [Pg.145]

Glyceraldehyde (2,3-dihydroxypropanal), acetol, and dihydroxyace-tone form 1-5% of biacetyl and a number of other products, including pyrocatechol and 33, after exposure to aqueous alkali at 300°. Such trioses as glyceraldehyde and dihydroxyacetone have been shown to form various hexoses by aldol reaction. Aldolization, followed by retro-aldoliza-tion, is undoubtedly a major consideration when three-, four-, and five-carbon sugars are subjected to elevated temperatures. Differences in thermolysis products, partially quantitative, are noticeable at 100°, but, at temperatures near 300°, it is quite difficult, if not impossible, to determine if the starting material was a triose, a tetrose, or a pentose. [Pg.284]

Pyridine and its homologs can be reduced completely to hexahydro derivatives, or partially to dihydro- and tetrahydropyridines. Catalytic hydrogenation is faster than with the corresponding benzene derivatives and gives only completely hydrogenated products. Partial reduction can be achieved by different methods (pp. 55, 56). [Pg.54]

Theophylline is 1,3-dimethylxanthine theobromine is 3,7-dimethylxanthine and caffeine is 1,3,7-trimethylxanthine. A theophylline preparation commonly used for therapeutic purposes is aminophylline, a theophylline-ethylenediamine complex. The clinical use of theophylline is discussed below. The metabolic products, partially demethylated xanthines (not uric acid), are excreted in the urine. [Pg.433]

A Fe/Sb = 1/6 catalyst was investigated by Bakshi et al. [36] in a differential flow reactor, and compared with a Sn/Sb catalyst. With both, approximately half-order kinetics are found with respect to both the olefin and oxygen. At product partial pressuresPc4h5 andpH2o below 0.02 atm the rate of butadiene formation is described by... [Pg.189]

The brittle pellets are placed in an open combustion tube and heated for one hour at 500°C in a circular oven. The apparatus described in (I) under chromium chloride is used when the ignition is complete, except that 25ml of bromine (unwarmed) is substituted for the carbon tetrachloride, and the exit end of the combustion tube is fitted with a wide-mouth receiver that carries an outlet tube for the carbon dioxide. The reaction is maintained at 600-700°C until all the bromine has been volatilized the dark olive-green scale of product partially sublimes into the cooler end of the tube and receiver in almost quantitative yield. [Pg.21]

Di-t-butylphenol (2.06 g, 10 mmol) is dissolved in dimethylformamide (10 ml), an aqueous solution of 4 m periodic add (3.5 g, 4 ml) added, and the solution stirred at 85-95 °C (hot water bath) for 4-5 minutes. The coloured product partially crystallises out by this time. After 5-10 minutes at room temperature, the reaction mixture is diluted with 50 per cent aqueous methanol (8-10 ml), and the product isolated by filtration and washed with cold methanol. The resultant is recrystallised from aqueous acetone to give the product (94%) as brown-red needles, m.p. 245-247 °C. [Pg.1024]

The poly amine hydrogenation of [60]fullerene to produce C3v C6QH18 involves addition of [60]fullerene to a standard round bottomed flask containing diethylenetriamine (DETA) with 10-50 mg of [60]fullerene utilized per every milliliter of DETA. The solution is boiled under N2 in the dark for 2-20 h. Upon cooling, the bright orange product partially precipitates from solution. Further precipitation is... [Pg.113]

Whereas true coalescence is of limited importance in the case of milk and dairy products, partial coalescence is of far greater importance, in particular in the preparation of products such as whipped cream, butter,... [Pg.188]


See other pages where Productivity partial is mentioned: [Pg.367]    [Pg.413]    [Pg.397]    [Pg.556]    [Pg.108]    [Pg.43]    [Pg.284]    [Pg.125]    [Pg.347]    [Pg.499]    [Pg.131]    [Pg.366]    [Pg.366]    [Pg.740]    [Pg.367]    [Pg.745]    [Pg.178]    [Pg.235]    [Pg.190]    [Pg.50]    [Pg.186]    [Pg.567]    [Pg.402]    [Pg.526]    [Pg.78]    [Pg.393]   
See also in sourсe #XX -- [ Pg.432 ]




SEARCH



© 2024 chempedia.info