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Bleach chemical production

Additional information on health and safety aspects should be sought by consulting material safety data sheets available from suppHers of the chemical in question. In addition, most suppHers of bleaching chemicals, upon request, provide on-site training sessions by experts on the safe use and handling of their products. [Pg.158]

D. Lachenal, M. T. Taverdet, and M. Muguet, in "Production of Bleached Chemical Pulp in the Future," Eroceedings of the 1991 International Eulp Bleaching Conference, Stockholm, Vol. 2, The Swedish Association of Pulp and Paper Engineers, Stockholm, 1991, pp. 33—43 B. DiUner and P. [Pg.158]

Kraft Chemical Pulped Bleached Paper Production... [Pg.877]

Alliance for Environmental Technology, Trends in World Bleached Chemical Pulp Production 1990-2000, January 2001. Available at http //www.aet.org/reports/market/aet trends 2000.html. [Pg.908]

Human life, furthermore, certainly benefits from a less polluted world, and here, again, sol-gel entrapped catalysts are, literally, able to have transferred to within their large inner porosity the whole chemistry of fine chemicals production. Think for instance of an innocuous easily handled orange powder called SiliaCat TEMPO (Chapter 5) that added to a mixture of alcohols at 0 °C with a modest excess of aqueous, cold bleach rapidly converts them into all those fragrances, vitamins, hormones and drugs made of carbonyl compounds. [Pg.198]

Chlorine dioxide degrades rapidly in air (see Seetion 6.3.2.1) and should be measurable only near its source of production or use (e.g., pulp and paper mill plants, water treatment facilities). As part of an international study of workers in the pulp and paper industry, the concentration of chlorine dioxide was measured in the workplace air of pulp and paper mills from 19 countries. The concentration of chlorine dioxide was measured in the following work areas steam and power generation (range, <0.001-0.06 ppm) effluent water treatment (range, not detected to 0.003 ppm) and maintenance (range, <detection limit to 5.8 ppb) (Kauppinen et al. 1997 Teschke et al. 1999). In another study, the concentration of chlorine dioxide was measured in the workplace air at a pulp mill in British Columbia, Canada between May and June, 1988. The concentration of chlorine dioxide was <0.01 ppm in area samples and personal full-shift samples. The exception was in the bleach/chemical preparation area sample in which the concentration of chlorine dioxide ranged from <0.01 to 0.3 ppm (Kennedy et al. 1991). [Pg.107]

Hydrogen peroxide is a large-scale manufactured chemical compound due to its application as a disinfectant and in bleaching, although it also has an important use as a reactant in many minor-scale fine-chemical productions. [Pg.480]

A number of combustion and chemical production processes contribute to environmental concentrations of PCDD/F. Sources that have traditionally caused the greatest concern include municipal waste incinerators, hospital waste incinerators, bleached chemical wood pulp and paper mills, motor vehicles and wood combustion. We have attempted to represent the most recent data available on PCDD/F emissions from these sources. It should be remembered that the list presented here is by no means exhaustive. Potential sources of TCDD not discussed in the following paragraphs include discharges from metal processing and treatment plants, copper smelting plants and pentachlorophenol production. [Pg.18]

The reactions between bleaching chemicals and resin components result in a variety of degradation and chlorination products, only some of which have been identified. The extractives remaining in the pulp after bleaching also represent a complicated mixture of substances of more or less unknown composition. [Pg.162]

Did you know that many of the chemical products in your home are hazardous, too For example, common household bleach, when used as directed, is safe for disinfecting and whitening clothing. Hazard labels on bleaching products, however, warn against mixing bleach with acids, household ammonia, or products that contain these chemicals. Bleach, when combined with acids, produces toxic chlorine gas. The products of combining bleach with ammonia are explosive. [Pg.152]

Chlorine ranks among the top 10 chemicals produced in the United States. In 2008 approximately 11.5 million short tons (10.4 million metric tons) of chlorine were produced in the United States. Chlorine, in one form or another, is added to many swimming pools, spas, and public water supplies because it kills bacteria that cause disease. Many people also use chlorine to bleach their clothes. Large paper and pulp mills use chlorine to bleach their products. [Pg.125]

It is known that as soon as a perfume is incorporated into a product matrix, pronounced effects occur on some ingredients, those for which the microenvironmental interactions have changed significantly. Physicochemical interaction is a consideration no matter what the base, whereas chemical interactions only become really important in consumer products possessing a reactive challenge for fragrance, for example products with low or high pH (e.g. below 4, above 9), or redox power (e.g. cold wave hair products or laundry bleaches). (Chemical stability issues are elaborated in Chapter 9.)... [Pg.189]

These studies have thus shown that amineboranes (tcrt-butylamineborane and borane-ammonia complexes) are bleaching chemicals more efficient than hydro-sulfite. They are noncorrosive, and their bleaching degradation products are boric acid and an amine. However, their main disadvantage is their high cost, even if their optimal bleaching conditions can be obtained at about 10°C lower than what is used for hydrosulfite. [Pg.483]

Caustic Soda for Bleached Pulp Production, Advantages of Membrane Cells," Allied Chemical Corp. 1979. [Pg.360]


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