Process for the isolation of 1-naphthylamine-4,8-disulphonic aci

Details Process for the isolation of 1-naphthylamine-4,8-disulphonic aci Process for the isolation of 1-naphthylamine-4,8-disulphonic aci

1982-08-23

1983-10-04

Siegel, Alan

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C14360

Patent

active

044077629

ABSTRACT:
Process for the isolation of 1-naphthylamine-4,8-disulphonic acid from sulphonation mixtures containing it according to which process the sulphonation mixture is introduced into preheated water in such a manner that, at the start of crystallization, a temperature of at least 100.degree. C. is reached and the 1-naphthylamine-4,8-disulphonic acid is separated from the mother liquor at a temperature not higher than 70.degree. C. The process is applied particularly advantageously for the isolation of 1-naphthylamine-4,8-disulphonic acid from sulphonation mixtures which have been obtained by introducing in turns alkali metal sulphate, 1-naphthylamine-8-sulphonic acid and SO.sub.3 into sulphuric acid which has been introduced initially, a total of 1.5 to 3 mols of SO.sub.3 and 0.6 to 1.5 mols of alkali metal sulphate being employed per mol of 1-naphthylamine-8-sulphonic acid.

REFERENCES:
patent: 3979445 (1976-09-01), Ross et al.
patent: 4199529 (1980-04-01), Bonath et al.
patent: 4348336 (1982-09-01), Blank et al.

Affiliated with

Also associated with

Rating

Process for the isolation of 1-naphthylamine-4,8-disulphonic aci does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the isolation of 1-naphthylamine-4,8-disulphonic aci, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the isolation of 1-naphthylamine-4,8-disulphonic aci will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-972805