Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1974-11-18
1976-07-13
Garner, Vivian
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260484R, 260485R, 260488F, 260535R, 260537P, 260540, 260541, 260542, C07C 5144, C07C 5148
Patent
active
039694658
ABSTRACT:
Waste salt solution from cyclohexanone manufacture is acidulated in a neutralizer, after which the organic phase is separated and subjected to a counter-current extraction with a saturated aqueous solution of mostly monocarboxylic acids separated from a later stage of the process. The watery extract carries off sodium sulphate that would otherwise interfere with further refining and this extract is then returned to the neutralizing vessel where the waste salt solutions are being acidulated, thereby reducing the need for externally supplied water to keep sodium sulphate from precipitating in the neutralizer and also enabling the dissolved monocarboxylic acids to be recovered. The organic phase leaving the counter-current extractor then goes to a flash evaporator in a condition now free of sodium sulphate, so that the evaporator may continuously remove water and monocarboxylic acids, which are then condensed and separated, with the water phase going back to the extractor as previously mentioned. The outputs are a mixture of monocarboxylic acids from the last separator and a mixture of dicarboxylic acids and hydroxy acids from the liquid coming out of the evaporator.
REFERENCES:
patent: 2714118 (1955-07-01), Copenhaver et al.
patent: 2859154 (1958-11-01), Othmer
Garner Vivian
Woodward William R.
LandOfFree
Process for recovery of carboxylic acids from the waste salt sol 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 recovery of carboxylic acids from the waste salt sol, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for recovery of carboxylic acids from the waste salt sol will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1740010