Metal salt catalyst

Other methods are based on bromochloroethane [25620-54-6] trichloroethyl acetate [625-24-1tetrachloroethane [79-34-5] and catalytic cracking of trichloroethane (5). Catalytic processes produce as by-product HCl, rather than less valuable salts, but yields of vinyUdene chloride have been too low for commercial use of these processes. However, good results have been reported with metal-salt catalysts (6—8). 

Phenol, CeHsOH (hydroxybenzene), is produced from cumene by a two-step process. In the first step, cumene is oxidized with air to cumene hydroperoxide. The reaction conditions are approximately 100-130°C and 2-3 atmospheres in the presence of a metal salt catalyst ... 

Types of catalysts used include mineral or oiganic acids and latent acids such as ammonurea salts, amine salts, and metal salts (49). One type of catalyst used in early commercial processing was amine hydrochloride. However, the fishy odor evolving from this material has caused this type of catalyst to be discarded. Metal salt catalysts such as magnesium chloride or zinc nitrate have been widely used over the years. However, because of effluent concerns, zinc salts have fallen into disuse. Magnesium nitrate has been suggested as an alternative catalyst (50). 

Kleinert process 20-75% ethanol33 usually 50% Uncatalyzed or metal salt catalysts I60-I95°C 30-60 min (7, 17, 18)... 

AIST A process for converting PET (polyethylene tererephthalate) into virgin plastic. The scrap PET is first depolymerized by heating with ethylene glycol and a metal salt catalyst. 

The mesh stracture responsible for elasticity is achieved by the condensation of a mixture of silicone prepolymers on the fabric surface. This mixture may often consist of a terminal silanol (a, co-dihydroxy polydimethylsiloxane), methyl hydrogen silane and a metal salt catalyst (Fig. 12.1). The crosslinking reaction that forms the elastic structure in shown in Fig. 12.2. Some hydrosilane groups can be oxidised by air to silanol groups. Condensation of the silanol groups of neighbouring molecules generates crosslinked structures that are necessary for elasticity. 

CONDENSOL SK is a metal salt catalyst which contains complexing components. 

CONDENSOL I New is a special metal salt catalyst for water-repellent finishing with the silicone product PERSISTOL SIN. 

CNC CATALYST CC presents no compatibility problems with materials regularly used in the resin bath. Many metallic salt catalysts do tend to be unstable in the presence of some softeners and emulsions. 

DANSET JS is an uniquely modified, unbuffered, glyoxal-based resin for permanent pres work, either pre- or post-cured. Magnesium chloride based catalysts are recommended for use with DANSET JS, although other metal salt catalysts can be used. 

Section 4.1.1.2) or by contacting with mercury over 24 h [1614], Alternatively, removal of dichlorine can be achieved using a column containing metallic antimony [998]. Other methods for the removal of small quantities of Clj have employed copper amalgam, or mercury [1964]. For larger (>2%) quantities of dichlorine - ethene, ethyne or 1,3-butadiene may be introduced in the presence of ultraviolet radiation or metallic salt catalysts to scavenge the Clj [781]. 

ENDRIN (72-20-8) Reacts, possibly violently, with strong acids (forms explosive vapors), strong oxidizers. Incompatible with parathion. Rearranges to endrin ketone (8-ketoendrin) in the presence of some metal salts, catalysts, strong acids, in sunlight, and in elevated temperatures above 392°F/200°C. Slightly corrosive to metals. 

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