Enichem Anic S.p.a.

Enichem S.p.a

Euteco Impianti S.p.a.

Enimont Anic S.r.l.

Euteco, S.p.a.

Enichim Anic S.p.a.

Giuseppe Messina

Loreno Lorenzoni

Giovanni M Sechi

Vittorio Bruzzi

Mario D Moretti

Paolo Calaresu

Salvatore Simula

Oscar Cappellazzo

Salvatore R Sanna

Giovanni Soma

Riccardo Mansani

Lucio Di Fiore

Angelo Virdis

Pier Gianni Cabras

Silvio De Micheli

Lorenzo Lorenzoni

Giovanna Chessa

Antonio L Fadda

Giovanni Chessa

Gavino Sanna

Sergio E Lai

Gianfranco Biddau

Carmelo Nurra

Slavatore Simula

A process for the purification of raw acetone deriving from processes for the production of phenol acetone, impurity mainly due to cumene, water, aldehydes and methanol, the steps of:

Process for the purification of acetone

A continuous process for the production of oxamide is based on the catalytic oxidation of hydrogen cyanide with oxygen or air in a strong excess in a solution of copper nitrate in water-acetic acid. The process is carried out in a vertical tubular reactor, with continuous recycling of part of the suspension of oxamides from the bottom to the top of the reactor.

Production in continuous of oxamide for the catalytic oxidation of HCN

A procedure for the recovery of phenol from its mixtures containing cumene and alpha-methylstyrene, is based on the extractive distillation of the mixtures with acetophenone.

Procedure for the recovery of phenol from its mixtures containing cumene

A stream of raw phenol, coming from the acidic cracking of cumene hydroperoxide, is purified by a process of extractive distillation carried out in the presence of acetophenone.

Process for purifying phenol

A process of hydrodechlorination of effluents originating from the preparation of hydrocarbon resins is described, the effluents consisting of about 90% of unconverted monomers and containing between 600 and 2500 ppm of organic chlorine. Said hydrodechlorination process comprises subjecting the said effluents to hydrogenation at a temperature of between 200.degree. and 300.degree. C. in the presence of a catalyst, preferably consisting of Ni-Mo supported on .gamma.-Al.sub.2 O.sub.3.

Process for treating effluents originating from the preparation of

A new process for preparing oxalyl- and oxamyl-hydrazides which comprises contacting oxamide or diacetyloxamide with the corresponding hydrazine derivative of formula

Process for the preparation of oxalyl- and oxamyl-hydrazides

The disposal of chlorinated pitches is carried out by a process which employs two treatments with an alcohol, which are carried out in cascade. Such treatments cause the precipitation of the suspended matter to take place. This is then caused to settle, and is separated and pyrolized, while the supernatant is distilled in order to separate the alcohol, which is recycled back to the process, from other organic components, which are sent to further uses.

Process for disposing of residues deriving from the synthesis of

A process is disclosed for the purification of the diamide of oxalic acid obtained by means a process wherein copper catalysts are used, by means of the washing with aqueous solutions of an ammonium salt of an organic or inorganic acid, operating at a pH value comprised within the range of from 2 to 8, and at a temperature comprised within the range of from 40.degree. to 150.degree. C.

Process for purifying oxalic acid diamide

The present invention relates to a new method of synthesis of 2,2'-bis.DELTA..sup.2 -oxazoline, which consists of three steps: in the first step,

Synthesis of 2,2'-bis-.DELTA..sup.2 -oxazoline

A new process is described for the preparation of oxalic acid esters and amides of general formula (I) ##STR1## wherein Z designates an --OR or --NR.sup.1 R.sup.2 group, wherein R represents substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, or aryl-alkyl, R.sup.1 is hydrogen or substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, or aryl-alkyl, R.sup.2 represents substituted or unsubstituted alkyl, alkenyl, cycloalkyl, aryl, or aryl-alkyl, or R.sup.1 and R.sup.2 taken together with the adjacent nitrogen atom represent a saturated 5-, 6-, 7-, or 8-membered heterocyclic ring, which may contain an additional heteroatom selected from --O--, --S--, and --N(H, Alkyl)--, and optionally bear one or more alkyl or alkenyl substituents, and

Method of preparation of oxalic acid esters and amides

A process is described for the preparation of oxamide derivatives wherein one or both --NH.sub.2 groups are replaced by primary or secondary amino groups, through reaction of oxamide with a suitably selected amine of formula RR.sup.1 NH wherein R represents a substituted straight or branched (C.sub.2 -C.sub.12)alkyl radical wherein the substituent(s) or at least one of the substituents is selected from the group consisting of hydroxy, amino, mono-substituted amino, and di-substituted amino, and R.sup.1 represents hydrogen or an optionally substituted (C.sub.1 -C.sub.6)alkyl radical; representative oxamide derivatives which can thus be obtained useful as corrosion inhibitors, intermediates for polymers, polymer stabilizers, and slow-release fertilizers, are also described.

Chemical process for the preparation of oxamide derivatives and

Linear olefins are converted into the corresponding secondary alcohols by treatment with methyl alcohol and a tertiary alcohol, in the presence of an acidic catalyst, at a temperature ranging from 120.degree. to 200.degree. C. The product mixture substantially consists of the desired secondary alcohol and of the methyl ether of the charged tertiary alcohol. The reaction products can be easily isolated by fractionation, or, in some instances, the liquid product mixture can be used as such. Of particular interest is the direct hydration of n-butenes using tert-butyl alcohol as the tertiary alcohol. The obtained product mixture can be used as such, as an additive to methanol-containing gasolines for internal combustion engines.

Process for the direct hydration of linear olefins

A new process for preparing N,N'-bis-(2-hydroxyethyl)-piperazine (I) ##STR1## is described which involves reaction of oxamide with excess diethanolamine at a temperature of from 50.degree. to 268.degree. C.

Process for the preparation of N,N'-bis-(2-hydroxy-ethyl) piperazine

A process for the synthesis of vinyl ethers of formula ##STR1## wherein R.sub.1 and R.sub.2, each independently, represent hydrogen or a primary, secondary or tertiary alkyl group,

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Alghero, Italy

Giuseppe Messina