Montedison S.p.a.

Consiglio Nazionale Delle Ricerche

Ausimont S.p.a.

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Acna Chimica Organica S.p.a.

Giorgio Bornengo

Filippo M Carlini

Vittorio Alesse

Anna M Marabini

Fabrizio Merlo

Michele Pontevivo

Giorgio Bottaccio

Stefano Campolmi

Alessandro Malacrida

Maurizio A Beretta

Antonio Marraccini

Giorgio Guglielmo

Silvana Modena

Ruggero Battisti

Augusto Menconi

Camillo Paffoni

Giovanni Agnes

Nicola Mazzaferro

Danilo Domenis

Angelo Mangini

Antonio Tundo

Maria A Marabini

Zafferino Bozzolasco

Fabrizio Bergamini

2-mercapto-benzoxazole derivatives as collectors for the selective

This invention relates to improved catalytic process for the manufacture of copper phthalocyanine by allowing phthalic anhydride to react with urea and a copper compound, in the presence of a hydrophobic liquid (dispersing agent), characterized by the presence, along with the catalyst and the dispersing agent, of a promoter selected from particular classes of amides, imides, ureas, thioureas, guanidines, amines or sulphoxides.

Catalytic process for the manufacture of copper phthalocyanine

A process for the selective flotation of metal ores is described, wherein ionic organic collectors are utilized, which have the formula: ##STR1## where R and R.sub.1, like or different from each other, represent: H, a halogen, a straight or branched C.sub.1-9 alkyl group, an alkoxyl or hydroxyalkyl group in which the alkyl moiety contains from 1 to 9 carbon atoms, or a phenyl group; and M represents: H, Na, K, Li, Cs, NH.sub.4.

Process for the selective flotation of metal ores using

An improved process for the preparation of perfluoropropene oxide by the reaction of perfluoropropene with hydrogen peroxide in an aqueous alkaline medium is described. The improved process is characterized by carrying out the reaction in the presence of a phase-transfer catalyst selected from the group consisting of quaternary ammonium salts, phosphonium salts, and lipophilic complexing agents for cations, and by carrying out the addition of an aqueous solution of an inorganic base to the reaction mixture gradually so that a constant reaction temperature between -10.degree. C. and -60.degree. C. is maintained.

Process for preparation of perfluoropropane oxide

Ionic organic collecting agents for the selective flotation of lead and zinc ores, said agents having the following general formula ##STR1## wherein the symbols employed have the meaning given below: R represents H, CH.sub.3, C.sub.2 H.sub.5, or an alkoxyalkyl group,

Collecting agents for the selective flotation of lead and zinc ores and

Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p-methylbenzyl-trimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is carried out in the presence of a compound of the formula (I):

Process for the preparation of (2,2)-paracyclophane and derivatives

Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p-methylbenzyltrimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is carried out in the presence of a dialkylether of mono- and poly-ethylene glycols having the formula:

A process for the preparation of fluoroalkyl ethers of the formula: ##STR1## wherein: Y is Br or F;

Process for the preparation of fluoroalkyl perfluorovinyl ethers

Process for the preparation of 2-perfluoropropoxy-perfluoropropionyl fluoride by dimerization of hexafluoropropene epoxide in aprotic polar medium, in the presence of N,N,N',N'-tetrasubstituted diaminodifluoromethane as catalyst, characterized in that the dimerization reaction is carried out in the presence of a co-catalyst constituted by a nitrogenous organic base having structure of aniline, or of pyridine, or of a derivative thereof, wherein the nitrogen atom is not linked to hydrogen atoms and, in the case of the pyridine-type structure, it is sterically hindered by substituent groups on ortho-position relatively to it.

Process for the preparation of 2-perfluoropropoxy-perfluoropropionyl

Organic ionic collecting agents for the selective flotation of lead and zinc ores, said agents having the following general formula: ##STR1## wherein the symbols have the following meanings: R represents an alkoxyl group having from 3 to 12 carbon atoms;

Collecting agents for the selective flotation of lead and zinc ores

A new class of hydrosoluble monoazoic cationic dyes free of sulphonic or carboxylic groups and derived from 1-phenyl-3-aminopyrazoles is disclosed, as are, also, processes for preparing the new dyes and use thereof in the dyeing and printing of synthetic fibers.

Monoazoic hydrosoluble cationic dyes

The present invention concerns a class of compounds useful as dispersed dyes and insoluble in water, having the general formula (I): ##STR1## wherein the symbols have the following meaning: R is selected from the group consisting of an alkyl group having up to 5 carbon atoms, a group --CH.sub.2 --COOX, wherein X stands for an alkyl group having up to 4 carbon atoms; a group ##STR2## and a group --CH.sub.2 --CH.sub.2 --CN; R.sub.1 represents an H atom, a halogen atom (preferably Cl or Br) and an NO.sub.2 group. The dyes of this invention, are particularly suited for the dyeing and printing of synthetic fibres, in particular of polyester fibres. The shades vary from yellow-green to orange. They possess an excellent affinity as well as an excellent fastness to light both in the deep tones as well as in the bright tones. Good fastnesses are also found against sublimation, to solvents and to washing.

Isatin-derived dispersed dyes

This invention relates to a class of water-soluble acid azo dyes, containing at least a sulphonic group, having formula (I): ##STR1## wherein the symbols have the following meanings: A is a residue of a diazotizable aromatic or heterocyclic amine, optionally substituted;

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Novara, Italy

Giorgio Bornengo