Oxon Italia S.p.a.

Giovanni Bozzetto S.p.a.

Daniele Tarallo

Edoardo Pallucca

Nello Ronchi

Massimo Paladini

Alessandro Scalvedi

Jean Claude Valle

Francesco Spini

Claudio Ornati

In one embodiment, a scale inhibitor comprising at least one polymethylenephosphonate derivative having the following formula: wherein n is a number, wherein M is hydrogen or a cation, wherein R, R, and Rare each independently selected from the group consisting of CHPOM, CHR, wherein Ris CHOHCH, CHOHCHCl, or CHOHCHOH, (CH)SOM, wherein m is 3 or 4, and CHCHR, wherein Ris CONH, CHO, COOR, COOX, or CN, wherein Ris CHor CH, and wherein X is an alkali metal or ammonium, and wherein at least one of R, R, and Ris not CHPOM. In another embodiment, a method for inhibiting scale formation in water, and in still another embodiment, a method for sequestering iron ions in a water systems, each of the methods comprising the step of providing the water with the above described polymethylenephosphonate derivative.

Polyaminomethylenephos phonate derivatives

A process to prepare alkansulphonamides of formula RSO.sub.2 NR.sup.1 R.sub.2 --wherein R is an alkyl group containing from 1 to 15 carbon atoms, or an alkyl group containing from 1 to 15 carbon atoms substituted by one or more chlorine or bromine atoms, and R.sup.1 and R.sup.2 are equal or different and may be hydrogen or an alkyl group containing from 1 to 15 carbon atoms--provides to treat an alkansulphonylhalide of formula RSO.sub.2 X--wherein X is chlorine, bromine or iodine--with a suitable quantity of a compound of formula NHR.sup.1 R.sup.2, using as solvent for said treatment an aliphatic nitrile.

Process to prepare alkansulphonamides

Growing community of inventors

Segrate, Italy

Daniele Tarallo