Byproducts bleach

Hydrazine, N2H4, is made commercially by this process. Certain byproducts of this reaction, notably NH2C1 and NHC12> are both toxic and explosive, so solutions of household bleach and ammonia should never be mixed with one another. 

DAST-type FBAs may contain by-products (such as 11.13) derived from hydrolysis of one or more of the chloro substituents in cyanuric chloride (11.10). One such troublesome byproduct is 2,4-bis(anilino)-6-hydroxy-s-triazine (11.62). Not only is this compound environmentally undesirable, it may also interact with certain bleaching agents and its presence can lead to the development of unpleasant odours on storage of a detergent... 

WASTE DISPOSAL METHOD All neutralized material should be collected, contained and thermally decomposed in EPA approved incinerators that will filter or scrub toxic byproducts from effluent air before discharge to the atmosphere. Any contaminated materials or protective clothing should be decontaminated using HTH or bleach and analyzed to assure it is free of detectable contamination (3X) level. The clothing should then be sealed in plastic bags inside properly labeled drums and held for shipment back to the DA issue point. 

The direct electrochemical oxidation (no cell divider membrane) of wastewater has been employed in the textile industry. Typically, this industry produces an organic-contaminated wastewater that also contains sodium chloride sodium chloride is desirable in promoting anodic oxidation. The presence of sodium chloride is fortuitous for textile manufacturers since the hypochlorite byproduct produced in the electrochemical oxidation process is used for textile bleaching operations.24... 

Hydrogen peroxide is a green chemical that only leaves water or 02 as byproducts. Thus, it is increasingly used to bleach pulp and paper, bleach... 

Sodium sulfite (Na2S03) is produced by reacting sulfur dioxide with a solution of sodium carbonate or sodium hydroxide. Sodium sulfite is also recovered as a byproduct of resorcinol production. About half of the sodium sulfite produced in North America is used by the pulp and paper industry (i.e., chemithermomechanical process). It is also used in photography, textile bleaching, and food preservation, and as a chemical intermediate. Some producers can switch from sodium sulfite to sodium bisulfite or metabisulfite in the same facility. In 1998, the market demand for sodium sulfite was 102,000 tons in the United States, excluding that produced and used captively by some paper mills. The demand has decreased substantially over the recent years as pulp mills have reduced sulfur discharges. 

Acetate Tow A yellowish powder that is a byproduct of paper bleaching, used for cigarette filters and medical gauze. 

With physical rehning, the oil is first degummed and bleached and then fed to a continuous distillation (deodorization) unit, which removes the free fatty acids (92-95%) and volatiles. The rehned oil is blended as above. Frequently, distillation is stopped before removal of all of the free fatty acids, and the oil is alkali rehned to remove the remainder of the free fatty acids. This procedure has the advantage of ehminahng oxidation byproducts and pro-oxidant metals, thus improving product stabihty. 

As a result of processing methods, condition of the original byproduct raw material, storage conditions, and other factors, rendered fats may have a minimum color that can be achieved by refining and bleaching. This best attainable color can be determined by the AOCS Method Cc 8d-55, refined and bleached color (tallow and greases for soaps). The various grades of rendered fats reflect different R B color values as outlined by the AFOA (14). 

Oxidation-reduction reactions can be used for bleaching materials and sanitizing water. Sodium hypochlorite is used in solution as a liquid laundry bleach and as a solid component of dishwasher powders and cleansers. Calcium hypochlorite is often used for swimming pool sanitation. The hypochlorites kill bacteria in water by oxidizing them. Ozoue is a powerful oxidizing agent that can also be used to purify water. The ozone destroys bacteria and organic pollutants. Water that has been sanitized by ozone is free of the unpleasant taste, smell, and byproducts associated with chlorinated water. 

Phosgene is sometimes a byproduct of manufacturing aniline dyes, polycarbonate resins, coal tar, pesticides, isocyanates, polyurethane, and pharmaceuticals. Phosgene also occurs in uranium enrichment processes and bleaching sand for glass production. 

Products and Uses Among the most toxic synthetic chemicals known. It is produced when certain organic compounds are burned. It is also a byproduct of the chlorine bleaching process of wood pulp to produce papers, diapers, and so... 

Polychlorinated dibenzodioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), often termed dioxins , consist of 210 different compounds which have similar chemical properties. This class of compounds is persistent, toxic, and bioaccumulative. They are generated as byproducts during incomplete combustion of chlorine containing wastes like municipal solid waste, sewage sludge, and hospital and hazardous wastes. Industrial processes such as bleaching of wood pulp in the manufacture of paper products, can also produce PCDDs and PCDFs [39]. 

HjS as byproducts. After additional washing, bleaching, and other treatments, the water-swollen cellulose is dried, becoming a transparent film. 

Prevention of hot spots and efficient removal of the heat of reaction are very important because of the thermal instability of hypochlorites. The continuing reaction of hypochlorite to form unwanted byproducts is part of the discussion of emergency vent scrubbers (Section 9.1.10.3A), where it is more of an issue. Here, we note that the production of high-quality bleach depends on a consistent supply of chlorine in the tail gas and on adequate temperature control. The absorbing solution is therefore circulated by titanium centrifugal pumps around the reactor(s) through titanium coolers, usually of the plate-and-frame type. The recirculation of liquor in itself provides turbulence in the reaction zone, and the volume of circulation determines the maximum temperature possible in the reactor. A gas feed or the vaporization of a liquid chlorine supply may also be used to promote turbulence. 

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