Process for separating technically pure 2,4-...

Details Process for separating technically pure 2,4-... Process for separating technically pure 2,4-...

C - Chemistry, Metallurgy

07

C

260/496.1

C07C 71/00 (2006.01) C07C 249/14 (2006.01) C07C 263/18 (2006.01)

Patent

CA 1211122

A PROCESS FOR SEPARATING TECHNICALLY PURE 2, 4-DIISOCYANATOTOLUENE OR ISOMER MIXTURES HAYING AN INCREASED CONTENT OF 2,4-DIISO- CYANATOTOLUENE FROM ISOMER MIXTURES OF 2,4- AND 2,6-DIISOCYANATOTOLUENE ABSTRACT OF THE DISCLOSURE Technically pure 2, 4-diisocyanatotoluene or an isomer mixture having an increased 2, 4-diisocyanato- toluene content is obtained from an isomer mixture of 2,4- and 2,6-diisocyanatotoluene. The 2,4- and 2,6- diisocyanatotoluene mixture is first cooled to a tempera- ture of from 4 to 9°C and further cooled to between -2 to -6°C at a rate of 0.5 to 3°C per hour. The temperature of the mixture is maintained at that temperature for at least 30 minutes. Any liquid present is removed and the solid remaining is then melted. Melting is preferably carried out by heating the solid at a rate of 0.5 to 3°C per hour until the remaining solid has a 2,4-diisocyanato- toluene content of at least 98%. The liquid melt is removed and the solid having the desired 2,4-diisocyanato- toluene content is then melted.

428093

Affiliated with

Also associated with

Rating

Process for separating technically pure 2,4-... 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 separating technically pure 2,4-..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for separating technically pure 2,4-... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1335744