Atochem

Caffaro, S.p.a., Societa Per L'industria Chimica Ed Elettrochimica

La Chemical Spa

Sisas S.p.a.

Massimo Morbidelli

Sergio Carra

Raymond Commandeur

Bernard Jean Gurtner

Renato Paludetto

Giuseppe Storti

Franco Codignola

Roberto Ruggieri

Elio Santacesaria

Sergio Carra'

Davino Gelosa

Gianni Carvoli

Achille Pontoglio

Agostino Tricella

Guido Niederjaufner

Guiseppe Storti

Giovanni Ranghino

Lucio DiFiore

Process for the esterification of organic acids with alcohols in a reactor of the chromatographic type in which the heterogeneous solid phase is capable of acting both as an esterification catalyst and as a means exhibiting preferential adsorption towards one of the reaction products (typically water). The process to which the present invention relates is particularly improved compared with conventional technology owing to the use, as the means for regenerating the catalyst, of a desorbent to which has been added a second compound, generally the anhydride of the acid used in the esterification reaction, which, by chemical reaction, completes the removal of the adsorbed water.

Process for esterification in a chromatographic reactor

The process for the separation of isomeric dichlorotoluenes, comprising the steps of:

Process for the separation of isomeric dichlorotoluenes

The invention relates to a process for separating mixed monochlorotoluene isomers, which comprises a first stage of adsorption carried out by passing said mixture through at least one column filled with a zeolite, and a second stage of deadsorption from said zeolite carried out by passing two deadsorbents in succession in the vapor phase through the column.

Process for separating mixed monochlorotoluene isomers, a plant for

A process for separating dichlorotoluene isomers from a mixture containing at least two dichlorotoluene isomers comprising

Process for separating isomeric dichlorotoluenes by adsorption

A process for the separation of metaxylene from aromatic C.sub.8 hydrocarbons, particularly from ethylbenzene and paraxylene, wherein a first phase is provided in which the mixture of aromatic hydrocarbons is selectively adsorbed, in vapor phase, into a catalytic bed consisting of zeolite of the Y type, preliminarily exchanged with potassium, and in a second phase a desorption is effected with a suitable solvent. The process, carried out at a temperature of 150.degree. to 200.degree. C. and preferably at atmospherical pressure, permits the recovery of metaxylene, substantially pure and at a concentration much higher than that of the starting mixture.

Process for the separation of metaxylene from mixtures of aromatic

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Milan, Italy

Massimo Morbidelli