Process and apparatus for removing aldehydes from acetone

Patent metadata

Field	Value
Publication number	US-10358406-B2
Application number	US-201816023442-A
Country	US
Kind code	B2
Filing date	Jun 29, 2018
Priority date	Jun 29, 2017
Publication date	Jul 23, 2019
Grant date	Jul 23, 2019

Abstract

The present invention relates to process and apparatus for removing aldehydes from acetone. More specifically, the present invention relates to a process and apparatus for removing aldehydes from acetone by reacting the aldehydes with caustic in an acetone column and washing the organic phase with a plurality of water streams.

First claim

The invention claimed is:

1. A process for removing aldehydes from acetone, comprising:
introducing a feed stream containing at least one organic compound in a column;
introducing an aqueous caustic scrubbing solution into the column;
introducing a first water stream into a lower portion of the column;
introducing a second water stream into the lower portion of the column;
removing spent aqueous caustic and aldehyde solution from the column; and
removing an organic product from an upper portion of the column having a reduced level of aldehydes relative to the feed stream.

2. The process of claim 1 , wherein the feed stream comprises acetone, cumene, water, and aldehydes.

3. The process of claim 1 , wherein the organic compound is acetone.

4. The process of claim 1 , wherein the process removes about 99% of aldehydes.

5. The process of claim 1 , wherein the caustic scrubbing solution contains about 0.5 wt % caustic to about 20 wt % caustic.

6. The process of claim 1 , wherein the caustic scrubbing solution contains about 1% of caustic.

7. The process of claim 1 , wherein the column is a finished acetone column.

8. The process of claim 1 , wherein the column is operated at a pressure from about −0.50 kg/cm2(g) to about 2.0 kg/cm2(g) and a temperature from about 40° C. to about 100° C.

9. The process of claim 1 , wherein the first water stream comprises water and about 10% acetone.

10. The process of claim 1 , wherein the second water stream is 100% water and is introduced to the column at a rate of 0.1 kg water/kg acetone product to about 0.4 kg water/kg acetone product.

11. The process of claim 1 , wherein the aldehydes react with acetone, catalyzed by the caustic scrubbing solution inside the column to form an aldol or heavy, soluble in the cumene-rich organic phase, which is rejected to the bottom of the column.

Assignees

• Uop Llc
• Advansix Inc

Inventors

• Williams Chad A
• Petragnani Michael J
• Schulz Russell C
• Wright Daniel R

Classifications

• C07C45/80 Primary

  by liquid-liquid treatment · CPC title

• B01D11/043

  with stationary contacting elements, sieve plates or loose contacting elements · CPC title

• C07C45/53

  of hydroperoxides · CPC title

• B01D11/0492

  Applications, solvents used · CPC title

• C07C45/85 Primary

  by treatment giving rise to a chemical modification (by chemisorption C07C45/79) · CPC title