Process for preparing a scaling inhibitor

Details Process for preparing a scaling inhibitor Process for preparing a scaling inhibitor

1986-01-14

1988-05-24

Sutto, Anton H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252 82, C07F 909

Patent

active

047464658

ABSTRACT:
The present invention relates to a process for preparing a scaling inhibitor. The process comprises reacting 1,3-diaminopropanol-2 and/or polyhydroxypropylenepolyamines of the general formula: ##STR1## wherein n=2 to 20, with formaldehyde and phosphorus trichloride in an aqueous medium at a temperature of 35.degree. to 50.degree. C.; formaldehyde and phosphorus trichloride being used in amounts smaller than their stoichiometric amounts as calculated for the starting amines.
The inhibitor prepared by the process according to the present invention ensures an effective protection against scaling, e.g. of barium sulphate, calcium sulphate and calcium carbonate. The process also features a low temperature of the synthesis of the inhibitor.

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