Selectively separating oxalic, tartaric glyoxylic and...

Details Selectively separating oxalic, tartaric glyoxylic and... Selectively separating oxalic, tartaric glyoxylic and...

C - Chemistry, Metallurgy

07

C

260/534, 260/533

C07C 55/06 (2006.01) C07C 51/487 (2006.01) C07C 59/153 (2006.01) C07C 59/255 (2006.01)

Patent

CA 1067513

ABSTRACT OF THE DISCLOSURE Mixtures of oxalic, meso tartaric, glyoxylic and erythronic acids derived particularly from the oxidation of cellulose deriv- atives are separated from aqueous solutions in which they are contained and from each other by stepwise precipitation with cal- cium ion at controlled pH. The oxalic acid is precipitated as calcium oxalate at a pH of 0.9 to 2.0; the tartaric acid as cal- cium meso tartrate at a pH of 2.8 to 4.4; and the glyoxylic acid, as calcium glyoxylate at a pH of 4.5 to 5.4. After each preci- pitation the water insoluble precipitate is separated from the aqueous mixture in which it is contained. The relatively sol- uble erythronic acid remains in solution as a free acid, or in the form of its calcium salt.

261560

Affiliated with

Also associated with

Rating

Selectively separating oxalic, tartaric glyoxylic and... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Selectively separating oxalic, tartaric glyoxylic and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Selectively separating oxalic, tartaric glyoxylic and... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-698112