Montedipe S.p.a.

Montedison S.p.a.

Montedipe S.r.l.

Enichem Anic S.r.l.

Sergio Tonti

Paolo Roffia

Piero Furlan

Gianpietro Talamini

Vittorio Gervasutti

Alberto Cesana

Pierangelo Calini

Maria Angela Mantegazza

Mario Padovan

Roberto Pernice

Gianpiero Talamini

Raffaele Tancorra

Francesco Cellini

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

A process for producing large-size formed articles consisting of a modified polyamide, by polymerization of a mixture containing, besides the omega-lactam corresponding to the polyamide, the following reagents:

Process for producing large-size formed articles consisting of a

A process for producing modified, impact-resistant polyamides showing an increased polymerization rate, which consists in polymerizing an .omega.-lactam in the presence of:

Process for producing modified, impact-resistant polyamides with

Process of preparing modified polyamides endowed with improved mechanical properties, which process resides in polymerizing an .omega.-lactam in the presence of

Polymerization of lactam polyisocyanate having the isocyanate groups

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 concerns a two-step process for the synthesis of caprolactam by reaction of cylcohexanone-oxime with an excess of oleum, carried out in a first step with only a portion of the oxime and in the presence of liquid SO.sub.2, according to usual 'cold' techniques, the amount of free SO.sub.3 in the oleum being equal to or greater than 50% by weight, wherein said 'cold' step is completed by a second 'hot' step, by adding a second portion of oxime, the ratio between said second portion and said first portion ranging from 0.5 to 1.2.

Process for the synthesis of epsilon-caprolactam

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.

Growing community of inventors

Venice, Italy

Sergio Tonti