C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 39/04 (2006.01) C07C 37/68 (2006.01) C07C 37/78 (2006.01) C07C 37/80 (2006.01)
Patent
CA 2094187
A process for purifying and recovering phenol present in a mixed solution containing phenol and one or more compounds capable of forming azeotropic mixtures with phenol wherein an additive which is at least one compound belonging to the following groups 1 to 5 is added to the mixed solution and the resulting mixture is distilled: group 1: dialkylene glycols having 2-10 carbon atoms, polyalkylene glycols having 2-10 carbon atoms, and the ethers thereof, group 2: alkanediols having 2-20 carbon atoms, group 3: ethanolamine-type compounds represented by the formula (1) shown below, group 4: lactam compounds represented by the formula (2) shown below, group 5: quinoline, sulfolane, and N,N-dimethylimidazolidinone, (see formula I) wherein R1 represents an alkyl group having 1-6 carbon atoms, a cycloalkyl group having 1-6 carbon atoms, a monohydroxyalkyl group having 1-6 carbon atoms or a hydrogen atom, m represents an integer of 1-4, and X represents a hydroxyl group, an amino group or a hydrogen atom provided that R1 and X may conjointly represent a group which can be formed by removing respectively one hydrogen atom from R1 and X, respectively, and connecting the rests of R1 and X to form a cyclic ring, Image wherein R2 represents an alkyl group having 1-6 carbon atoms, a cycloalkyl group having 1-6 carbon atoms, a monohydroxyalkyl group having 1-6 carbon atoms, or a hydrogen atom, and n represents an integer of 3-7.
Imamura Eiji
Kawasaki Michihiro
Kimura Kazuo
Kogure Kayoko
Toma Masaaki
Marks & Clerk
Sumitomo Chemical Co. Ltd.
LandOfFree
Process for purifying phenol 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 purifying phenol, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for purifying phenol will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-2078893