Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1974-09-06
1976-02-24
Thomas, Jr., James O.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
260621A, 260621H, 260627G, C07C 3906
Patent
active
039404510
ABSTRACT:
A process of recovering BHT values from the mother liquors of the crystallization of BHT obtained by alkylating p-cresol with isobutylene in the presence of a catalyst and crystallizing the BHT, comprises thermally cracking the starting mother liquor at a temperature of from 200.degree.C to 250.degree.C in the presence of an acid catalyst to reform the cresol polymers, steam distilling the cracked mixture to increase the p-cresol content and remove the diisobutylene, realkylating the steam-distilled reaction mixture with additional isobutylene, to produce a crystallizable mixture of BHT having a BHT concentration of from 80 to 85% by weight, and recovering the BHT by crystallization.
The mother liquors remaining after realkylation and crystallization can be admixed with the starting mother liquors and reused in the thermal cracking step of the process.
REFERENCES:
patent: 2366497 (1945-01-01), Dawson
patent: 2428745 (1947-10-01), Stillson
patent: 2498999 (1950-02-01), Offutt
patent: 2553538 (1951-05-01), Arnold
patent: 2733274 (1956-01-01), Cowie
Lone W. B.
Thomas, Jr. James O.
LandOfFree
Process of recovering BHT values from mother liquors of the crys 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 of recovering BHT values from mother liquors of the crys, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process of recovering BHT values from mother liquors of the crys will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2079734