摘要:
Fluorinated polymers having epoxy resin structure, containing at least 10% by weight, preferably 20% by weight, of fluorine, prepared starting from epichlorohydrin and from one or more diols, at least one of which is a perfluoroalkylene diol, and by using conventional cross-linking agents for epoxy resins, such as anhydrides of dicarboxylic acids, di- or tri-isocyanates, polyfunctional amines.
摘要:
A process for the disposal of chlorinated organic products, wherein said products are first treated with a sulphonating or nitrating agent, and then are oxidized with an aqueous solution of H.sub.2 O.sub.2, in the presence of Fe(II) ions as catalysts, optionally in association with ions of other transition metals selected from Cu(II), Ti(IV), Mn(II), Co(II), Ni(II), W(IV), Mo(IV), or mixtures thereof. The process leads to a substantially complete elimination of the chlorinated organic products with consequent, considerable reduction of the Chemical Oxygen Demand (COD), and to a high mineralization degree of the organic chlorine atoms.
摘要翻译:处理氯化有机产物的方法,其中首先用磺化或硝化剂处理所述产物,然后在作为催化剂的Fe(II)离子存在下,用H 2 O 2的水溶液氧化,任选地与 选自Cu(II),Ti(IV),Mn(II),Co(II),Ni(II),W(IV),Mo(IV)或其混合物的其它过渡金属的离子。 该过程导致氯化有机产物的基本完全消除,从而大大降低了化学需氧量(COD),并且有机氯原子的高矿化程度。
摘要:
New lubricating greases, the oily component of which is perfluoropolyether or fluoropolyether derivative of formula R--O--Q--CFX--(Y).sub.n --Z, having a number average molecular weight ranging from 1,500 to 10,000.whereinR is perfluoroalkyl radical R.sub.F or Z(Y).sub.n)--CFX;Q is perfluoroalkylpolyether or fluoroalkylpolyether chain;X is F or CF.sub.3 ;Y is a linking divalent radical;n is zero or 1; andZ is a radical selected from --CH.sub.2 OH, --CH.sub.2 OR.sup.1, --COOR.sup.2, --CONR.sup.3 R.sup.4 etc. . . . or from particular radicals containing heteroatoms or particular aromatic radicals.
摘要:
Fluorinated polymers having epoxy resin structure, containing at least 10% by weight, preferably 20% by weight, of fluorine, prepared starting from epichlorohydrin and from one or more diols, at least one of which being a perfluoroalkylene diol, and by using conventional cross-linking agents for epoxy resins, such as anhydrides of dicarboxylic acids, di- or tri-isocyanates, polyfunctional amines.
摘要:
Process for oxidizing organic materials or compounds in aqueous phase, with hydrogen peroxide and in the presence of ferrous ions Fe-(II), and optionally cupric ions cu-(II), carried out under irradiation with artificial visible light.