Cold bleaching

Kalt-blelche, /. cold bleaching. -bUiter, m. cold-blooded animal, -bruch, m. cold-short ness. 

Additives (g/1) Cistern Jig Winch or jet Package machine J-box conveyor Cold bleach... 

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. 

Acetylating and dehydrating agent used in the chemical and pharmaceutical industries for the manufacture of cellulose acetate, for textile sizing agents and cold bleaching activators, for polishing metals and for the production of brake fluids, dyes, explosives. 

All purpose wetting agent and cold bleach assistant. 

STABILIZER DR-9 may be used to stabilize peroxide bleach baths for cellulosic fibers alone or in blends, in soft or hard water, in hot or cold bleach procedures, and on yarns or white or yarn-dyed fabrics. 

NaOCl. Formed (with NaCl) from CI2 plus cold NaOH solution. Forms hydrates. Aqueous solutions are used as bleaches and antiseptics. 

The aqueous solution of sodium chlorate(I) is an important liquid bleach and disinfectant. It is produced commercially by the electrolysis of cold aqueous sodium chloride, the anode and cathode products being mixed. The sodium chloride remaining in the solution does not usually matter. There is evidence to suggest that iodic(I) acid has some basic character... 

Neutralizing Lotion. The principal active ingredient of cold wave neutralizers is usually an oxidizing agent. The most popular is hydrogen peroxide [7722-84-1J, employed at a concentration of 1—2% it continues to find widespread use. Aqueous solutions of sodium bromate [7789-38-0] at a concentration of 10—20% occasionally are used and are technically preferred over the peroxide formulations because of excellent stabiUty and absence of hair bleaching. Neutralizing powders appear to be on the decline but formulations stiU in use consist of sodium perborate [7632-04-4] combined with hexametaphosphates to improve solubiUty in hard water. 

Mercury orange [l-(4-chloromercuriophenylazo)-2-naphthol] [3076-91-3] M 483.3, m 291.5-293°(corr) with bleaching. Wash several times with boiling 50% EtOH and recrystallise from 1-butanol (0.9g/L of boiling alcohol). Fine needles insoluble in H2O but slightly soluble in cold alcohols, CHCI3 and soluble in aqueous alkalis. [J Am Chem Soc 70 3522 1948.]... 

Table 10.16 Recommended conditions for cold pad-batch peroxide bleaching...

Table 10.32 Comparison of cold and hot mercerising processes for bleached and unbleached cotton and for modal fibres [275,277] ...

Wet formed sheets of groundwood, holocellulose pulp and bleached kraft pulp were cold pressed for one minute at a 0.1 MPa and hot pressed between two press wires at 150°C for one minute at... 

Hypochlorite is used for bleaching in many regions of the world where laundry habits, such as washing in cold water, would make sodium perborate less effective. 

A 100 mL flask was filled with Jacobsen s catalyst (26 mg), (Z)-methyl styrene (lmmol) and dichloromethane (1 mL). The solution was cooled with an ice-bath. To this solution was added the cold solution of bleach previously prepared (3.5 mL). 

H is reasonably safe to handle if kept cold, but anything coming into contact with the liquid or its vapors should be washed thproughly with a bleach solution. H may be prepared in two ways - by adding hydrochloric acid to thiodiglycol or by bubbling ethylene gas through liquid sulfur dichloride (Levinstein process). The latter is the route we will take. While a simple process, the manufacture of H is extremely hazardous due both to the nature of the sulfur... 

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