Inorganic halogen compounds

The following data (Table 1) for molecules, including hydrocarbons, strained ring systems, molecules with heteroatoms, radicals, and ions comes from a review by Stewart.For most organic molecules, AMI reports heats of formation accurate to within a few kilocalories per mol. For some molecules (particularly inorganic compounds with several halogens, such asperchloryl fluoride, even the best semi-empirical method fails completely. 

Chemical Properties. A combination of excellent chemical and mechanical properties at elevated temperatures result in high performance service in the chemical processing industry. Teflon PEA resins have been exposed to a variety of organic and inorganic compounds commonly encountered in chemical service (26). They are not attacked by inorganic acids, bases, halogens, metal salt solutions, organic acids, and anhydrides. Aromatic and ahphatic hydrocarbons, alcohols, aldehydes, ketones, ethers, amines, esters, chlorinated compounds, and other polymer solvents have Httle effect. However, like other perfluorinated polymers,they react with alkah metals and elemental fluorine. 

Few of the many other inorganic compounds of Ge, Sn and Pb call for special comment. Many pseudo-halogen derivatives of Sn, Pb and Pb have been reported, e.g. cyanides, azides, isocyanates, isothiocyanates, isoselenocyanates and alkoxides. ... 

Solvent extraction shows effectiveness in the removal of organic wastes such as PCBs, VOCs, halogenated solvents, and petroleum wastes, but is less effective in removing inorganic compounds.39 The removal of organic contaminants depends on the nature of the extracting solvent. Organic bound metals can become a constituent of the concentrated waste, which is undesirable because it can restrict both disposal and recycle options. 

The decomposition of a number of inorganic compounds which contain both halogen and oxygen atoms, such as COCl2, NOC1, SOCl2, C102F, are discussed in Chapter 3. 

Patent literature reports also on halogen-free composition for PS foams, using phosphorus compound, such as RP, triphenyl phosphate, diphenyl cresyl phosphate, APP or diphenyl phosphate, and metal hydroxide such as magnesium or aluminum hydroxide.88 It is reported that PS foams containing a mixture of EG (6-10 wt%), inorganic compound (5-10 wt%) and RP, triphenyl phosphate (TPP) or 9,10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide (DOP)), and chalk compounds (5-10 wt%)89 or containing EG and phosphorus compounds such as RP, triphenylphosphate diphenyl cresyl phosphate, APP, melamine phosphate, resorcinol diphenyl phosphate, and dimethyl methylphosphonate in suitable amounts90 fulfills DIN 4102-B2 requirements. 

Halogen atoms in certain inorganic compounds may be replaced by fluorine by the use of antimony (III) fluoride without a catalyst. In other cases, varying amounts of different kinds of catalysts are required. For example, sometimes the addition of chlorine in the amount of 1 % of the antimony (III) fluoride will suffice. Molecules which are more difficult to fluorinate may require chlorine, bromine, or antimony(V) chloride in quantities amounting to as much as 5% of the weight of antimony (III) fluoride used. 

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