Process for producing alkoxylated polyphenols

Patent metadata

Field	Value
Publication number	US-11066524-B2
Application number	US-201716338819-A
Country	US
Kind code	B2
Filing date	Oct 3, 2017
Priority date	Oct 4, 2016
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

The invention relates to a process for producing at least one alkoxylated polyphenol comprising the following successive steps:(a) reacting at least one polyphenol, at least one alkoxylating agent, at least one catalyst, in the presence of at least one alkoxylated polyphenol as a solvent, the polyphenol/polyphenol alkoxylated weight ratio as a solvent being less than 2, preferably less than or equal to 1.5, more preferably less than or equal to 1, even more preferably less than or equal to 0.5; and(b) removing the residual alkoxylating agent.

First claim

The invention claimed is:

1. A process for producing at least one alkoxylated polyphenol comprising the following successive steps:
(a) reacting at least one polyphenol, at least one alkoxylating agent and at least one catalyst in the presence of at least one alkoxylated polyphenol as a solvent,
wherein the (polyphenol)/(alkoxylated polyphenol as a solvent) weight ratio ranges from 0.05 to 0.5 and the (polyphenol)/(alkoxylating agent) weight ratio ranges from 0.15 to 0.7; and
(b) removing residual alkoxylating agent.

2. The process according to claim 1 , wherein the polyphenol is selected from natural tannins, lignins and polyphenols other than tannins and lignins.

3. The process according to claim 2 , wherein the polyphenol is a lignin.

4. The process according to claim 1 , wherein the alkoxylating agent has the following formula (I):

wherein R 1 denotes a hydrogen atom or an alkyl radical in C 1 -C 6 .

5. The process according claim 1 , wherein the alkoxylating agent is selected from ethylene oxide, propylene oxide, butylene oxide, and mixtures thereof.

6. The process according to claim 1 , wherein the catalyst is selected from alkali metal hydroxides, sodium or potassium alkoxides, and tertiary amines selected from trialkylamines and tetramethylguanidine.

7. The process according to claim 1 , wherein the temperature in step (a) ranges from 70° C. to 200° C.

8. The process according to claim 1 , wherein the pressure during step (a) ranges from 0.1 to 1.8 MPa.

9. The process according to claim 1 , wherein it is carried out batchwise, semi-continuously or continuously.

10. The process according to claim 1 , comprising a step (c) of recovering the alkoxylated polyphenol obtained after step (b).

11. The process according to claim 1 , wherein the alkoxylated polyphenol produced by the process is identical to the alkoxylated polyphenol used as the solvent.

12. The process according to claim 1 , wherein the alkoxylated polyphenol produced by the process is different from the alkoxylated polyphenol used as the solvent.

Assignees

• Arkema France

Inventors

• Gillet Jean-Philippe
• Devaux Jean-François
• Leduc Philippe

Classifications

• C08G2110/0025

  rigid · CPC title

• D01F9/17

  from lignin · CPC title

• C08H6/00 Primary

  Macromolecular compounds derived from lignin, e.g. tannins, humic acids · CPC title

• C08L97/005

  Lignin · CPC title

• C08G18/6492

  Lignin containing materials; Wood resins; Wood tars; Derivatives thereof · CPC title