Reaction #1375808

Reaction equation

acetic

→

acetic

acrolein

Solvents

acetic acid

acetic acid

Conditions

Workup

1. 1
   workup.ADDITIONadd
2. 2
   workup.DISTILLATIONdistillation column
3. 3
   workup.DISTILLATIONa distillation column
4. 4
   workup.DISTILLATIONfor effectively reducing, by its distillation, acetic acid from the CAA
5. 5
   workup.DISTILLATIONDistillation of the Group
6. 6
   workup.ADDITIONA-treated CAA

Procedure

Another embodiment of the invention utilizing the same amine groups in similar manner is the addition of one or more amine of Group A to a CAA having a high (>2,000 ppm) level of acetic acid. This high acetic acid-containing CAA feed stream may be fed to an acetic add distillation column, that is, a distillation column used for effectively reducing, by its distillation, acetic acid from the CAA. Distillation of the Group A-treated CAA yields a low acrolein (also now low acetic add) CAA. (The Group A amine can be fed to the acetic acid removal column as a separate stream as the high acetic acid CAA is fed to the column.) Subsequently, the low acrolein CAA is fed to a final distillation column, i.e., a high purity acrylic acid distillation column, where the final distillation steps, previously described, are carried out.

Source