Manufacture of concentrated solutions, having a low salt content

Details Manufacture of concentrated solutions, having a low salt content Manufacture of concentrated solutions, having a low salt content

1978-10-02

1979-12-25

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

106 23, 106288Q, 106308N, 106308Q, 260145B, 260146R, 260147, 260148, 260149, 260150, 260151, C09B 4506, C09B 4510, C09B 4516, C09B 4520

Patent

active

041805020

ABSTRACT:
A process for the manufacture of concentrated solutions, having a low salt content, of o,o'-dihydroxy-or o,o'-dihydroxycarboxy-cobalt and -chrominum 1:2 complex dyes which are free from sulfonic acid groups, wherein the metallizing is carried out in water and a solvent of the formula I ##STR1## where X is hydrogen or methyl, m is 0 or 1, n is 1, 2 or 3 and R and R.sup.1 independently of one another are hydrogen or alkyl of 1 to 4 carbon atoms, in the presence or absence of additional solvents, and in the presence of water-soluble salts.

REFERENCES:
patent: 2843580 (1958-07-01), Straley et al.
patent: 2856397 (1958-10-01), Pfitzner et al.
patent: 2933488 (1960-04-01), Biedermann et al.
patent: 3299039 (1967-01-01), Moiso et al.

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