Process of producing a cyclohexane-1,2,3,4-tetracarboxylic acid-

Details Process of producing a cyclohexane-1,2,3,4-tetracarboxylic acid- Process of producing a cyclohexane-1,2,3,4-tetracarboxylic acid-

1977-12-20

1978-12-05

Pitlick, Harris A.

Compositions

Water-softening or purifying or scale-inhibiting agents

Plant or organic material containing

252 89R, 252DIG11, 562497, 562509, C02B 506

Patent

active

041284925

ABSTRACT:
A preparation for inhibiting scale formation in aqueous media with a high threshold activity is prepared by condensation of 2 moles of a mixture of acetic acid anhydride and an acetylhalide in the proportion of 0.2:1.8 to 1.8:0.2 with 0.6 moles to 1 mole crotonaldehyde, thereafter with 0.6 moles to 1 mole of acrylic acid, followed by condensation with 0.6 moles to 1 mole of maleic acid anhydride, and finally by oxidation with nitric acid without isolating any of the resulting intermediate products. Said preparation is added in amounts of 10 mg. to 200 mg. to each liter of aqueous medium to exert its scale formation inhibiting, chelating, sequestering, and/or complexing effect.

REFERENCES:
patent: 3459670 (1969-08-01), Carter
patent: 3784469 (1974-01-01), Krueger et al.
patent: 4043930 (1977-08-01), Krueger et al.

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