Euteco, S.p.a.

Eniricerche S.p.a.

Enichem S.p.a

Societa' Italiana Resine S.i.r. S.p.a.

Enichem Augusta S.p.a.

Condea Augusta S.p.a.

Lamberti Usa, Inc.

Tullio Pellizzon

Luigi Piccolo

Antonio Paolinelli

Peter Schwarz

Giuseppe Li Bassi

Giampietro Borsotti

Pierino Radici

Giampiero Borsotti

Giovanni Agnes

Massimo Ciali

Pierluigi Cozzi

Giuseppe Giuffrida

William M McGregor

Dario Fomara

Maria Luisa Meroni

Piero D Croce

Disclosed is a process for cleaning wellbore walls, tubing or casings. The process is characterized by (a) preparing an aqueous surfactant composition containing from about 10% to 60% by weight of a mixture of surfactants, the mixture comprising from 10% to 50% by weight of an anionic derivative of an alkylpolyglycoside, from 35% to 80% by weight of an alkylpolyglycoside and from 5% to 25% by weight of an anionic derivative of a fatty alcohol, their balance being 100%; (b) diluting the aqueous surfactant composition in water to form a diluted aqueous surfactant composition and injecting the diluted aqueous surfactant composition into a wellbore containing drilling mud, oily residues or other undesirable deposits; (c) extracting from the wellbore the diluted aqueous surfactant composition containing the drilling mud, oily residues or other undesirable deposits; (d) removing the drilling mud, oily residues or other undesirable deposits from the diluted aqueous surfactant composition; and (e) optionally, re-using the diluted aqueous surfactant composition.

Process for the cleaning of oil and gas wellbores

The process for the synthesis of an alkylpolyglucoside having the formula (I):

Process for the synthesis of alkylpolyglucosides

An improved method for synthesizing alkylpolyglucosides comprising reacting a glycoside with a long-chain alcohol in the presence of a novel type of catalyst, constituted by an alkali or aryl sulfonic acid, wherein the sulfonic group is sterically hindered. Using these catalysts, a raw product is obtained which is practically free from byproducts. The resulting alkyl polyglucosides are completely biodegradable surfactants and can be used to formulate detergents.

Process for preparing APG's

A process is disclosed for producing particular hydroxyalkyl glucosides in the presence of a binary catalyst.

Process for producing hydroxyalkyl glucosides

Process for the preparation of linear alkylbenzenes, wherein the benzene is reacted, in the presence of aluminum chloride or aluminum in powder form, with a mixture composed of C.sub.7 -C.sub.20 n-olefins and C.sub.7 -C.sub.20 chloroparaffins, with a molar ratio n-olefins/chloroparaffins between 70:30 and 99:1.

Process for the preparation of linear alkylbenzenes

This invention describes the preparation of a red pigment of iron oxide from ferrous salts, by simultaneous reduction of organic nitro derivatives.

Process for preparing a red pigmentary iron oxide

Aromatic amines and iron oxide pigment are produced by reacting a ferrous salt, a reduceable aromatic nitrogen compound chosen from nitroderivatives with a single nitro-group or with two nitro-groups and azoderivatives, and a basic compound, chosen from hydroxides and carbonates of ammonium, alkali metals and alkaline earth metals, operating at 25.degree.-200.degree. C. in an aqueous medium. The color of the pigment can be varied from yellow to black by increasing the reaction temperature and the molar ratio between ferrous salt and aromatic nitrogen compound.

Process for the joint production of aromatic amines and iron oxide

This invention describes a process for preparing a yellow iron hydroxide pigment from inorganic ferrous salts and aromatic nitro compounds.

Process for the preparation of yellow iron hydroxide pigment

This invention describes a process for preparing a red iron oxide pigment from inorganic ferrous salts and aromatic nitro compounds.

Process for preparing a red iron oxide pigment

Hydrolysis of a titanyl sulphate solution is carried out according to the autonucleation method of gradually adding the solution to a body of water at a substantially constant rate over 10-20 minutes, in such a way as to obtain an ionic concentration after one minute of feeding of from 75 to 105 g/l, the concentration of sulphuric acid in the final hydrolysis solution being regulated to a value of from 310 to 330 g/l by adding water from the commencement of clouding of the hydrolysis solution up to the end of hydrolysis.

Process for the hydrolysis of titanyl sulphate solutions

Titanium sulphate solutions obtained in the sulphate process from titaniferous materials are hydrolized by contacting at 88.degree.-98.degree. C water with a first titanium sulphate solution having a TiO.sub.2 titer of 230-260 g/l and an acid factor of 1.75-1.85, adding at 88.degree.-98.degree. C to the mixture a second titanium sulphate solution having a TiO.sub.2 titer of 230-260 g/l and an acid factor of 2.1-2.4 and heating the resulting mixture at boiling point. A volumetric ratio of from 3:100 to 12:100 is maintained between the first and the second solution.

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Paderno Dugnano, Italy

Tullio Pellizzon