Montedipe S.p.a.

Montedison S.p.a.

Enichem Anic S.r.l.

Montedison Fibre S.p.a.

Paolo Roffia

Mario Padovan

Alberto Cesana

Maria Angela Mantegazza

Sergio Tonti

Giordano De Alberti

Guido Petrini

Giuseppe Caprara

Giuseppe Leofanti

Carlo Fumagalli

Giorgio R Tauszik

Giuseppe Paparatto

Pierangelo Calini

Enrico Moretti

Fausto Genoni

Vittorio Gervasutti

Direct catalytic process for the production of hydroxylamine by means of the oxidation of ammonia with H.sub.2 O.sub.2, wherein the catalyst is composed of silicon, titanium and oxygen and has a crystalline (as in the case of titanium-silicalites, for example) or amorphous structure.

Direct catalytic process for the production of hydroxylamine

A multistep process for the liquid phase ammoximation of carbonyl compounds with H.sub.2 O.sub.2 and NH.sub.3, at 60.degree.-100.degree. C., at 1.5-5 bar and in the presence of a catalyst based on silicon, titanium and oxygen, characterized in that:

Multistep process for the liquid phase ammoximation of carbonyl compounds

The present invention relates to a method of preparing a catalyst for the ammoximation of carboxylic compounds, consisting of a synthetic, crystaline and porous material based on silicon and titanium oxides, characterized in that a preformed matrix of amorphous silica is impregnated with an aqueous solution, containing a titanium compound and an organic compound of nitrogen, as a templating agent, and that to the thus impregnated material a zeolitic structure is given by means of a hydrothermal synthesis of usual type, shape and size of the matrix being substantially maintained unchanged.

Method for the preparation of a catalyst for the ammoximation of

The invention concerns a catalytic process for the manufacture of oximes by ammoximation of the corresponding carbonyl compounds, characterized in that the catalyst is a solid composition consisting of silicon, titanium and oxygen, chemically combined with each other, and in that the titanium amount, expressed as TiO.sub.2, ranges from 1 to 95% by weight, the XR diffractogam of said composition being a smooth-trend line (halo), typical of the amorphous solids.

Catalytic process for the manufacture of oximes

The invention relates to a process for the synthesis of an N,N-dialkyl-hydroxylamine by reaction of the corresponding dialkylamine with H.sub.2 O.sub.2, said reaction being carried out in the presence of a catalyst based on titanium-silicalite.

Process for the synthesis of a N,N-dialkyl-hydroxylamine

The invention relates to a process of producing ketoximes, characterized in that a secondary alcohol, corresponding to the desired ketoxime, is partially oxidated in the liquid phase with O.sub.2, an oxidated mixture being thereby formed, which contains an excess of unreacted alcohol, the ketone corresponding to said alcohol, and H.sub.2 O.sub.2, and that said oxidated mixture is directly reacted with NH.sub.3 in the liquid phase (without isolating the alcohol, the ketone and H.sub.2 O.sub.2) in the presence of an ammoximation catalyst.

Process of producing ketoximes

The invention concerns a catalytic process for the manufacture of oximes by reaction, in the liquid phase, of the corresponding carbonylic compounds with NH.sub.3 and H.sub.2 O.sub.2, in which process the catalyst is substantially consisting of a crystalline material with a zeolitic structure containing silicon and titanium, subjected, before use, to an activating treatment with H.sub.2 O.sub.2.

A catalytic process for preparing cyclohexanone-oxime, by reacting cyclohexanone with NH.sub.3 and H.sub.2 O.sub.2 in the liquid phase, characterized in that the catalyst substantially consists of a highly crystalline substance, containing SiO.sub.2 and having a zeolitic structure.

Catalytic process for preparing cyclohexanone-oxime

A method of recovering the catalyst in active form from the acetic mother liquors from the synthesis of terephthalic acid. From said mother liquors, after removal of water, there is removed by evaporation an amount of from 70 to 90% of the CH.sub.3 COOH present therein. The concentrated liquor is cooled below 60.degree. C. and the solid which precipitates is collected and recycled for reuse in the systhesis. The liquid phase is extracted with water or with an aqueous acetic acid solution in the presence of particular coadjuvants such as isobutyl acetate, and the aqueous phase, which contains the recovered catalyst, is recycled to the original synthesis.

Method of recovering in active form the catalyst for the terephthalic

There is provided an improvement in the process for the preparation of organic monoesters of vicinal glycols and the corresponding free glycols by reacting an olefin with oxygen, water and a carboxylic acid, in the liquid phase, at an initial pH of lower than 7, the improvement comprising contacting the reaction mixture with a catalyst system consisting essentially of (i) iodine or an iodine compound selected from the group consisting essentially of copper iodide, manganese iodide, cerium iodide, an alkali metal iodide, an alkali earth metal iodide and the iodohydride of the olefin, (ii) a copper compound selected from the group consisting essentially of copper oxide, copper hydroxide, copper carbonate, copper iodide, and a copper salt of the carboxylic acid, and (iii) an activating ion selected from the group consisting of manganese cation, cerium cation, an alkali metal cation, an alkaline earth metal cation, nitric anion or a mixture of any of the foregoing, wherein the molar ratio of the carboxylic acid to water is lower than 1, the molar ratio of copper to water is equal to or lower than 2 moles of copper per 100 moles of water, and the molar ratio of iodine to copper is lower than 1.

Process for the manufacture of glycols and glycol nono-esters

The present invention concerns a process for preparing of alkylene carbonates, and more particularly it relates to a process for the direct preparation of alkylene carbonates from olefines. More particularly, the present invention relates to a direct process for the preparation of alkylene carbonates, characterized in that an olefine selected from the group consisting of linear olefines and cyclic olefins having from 2 to 15 carbon atoms is reacted in a liquid phase with carbon dioxide in the presence of a gas selected from the group of oxygen and air and in the presence of a catalytic system consisting of:

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Saronno, Italy

Paolo Roffia