Energy-efficient and environmentally friendly process for the production of target chemical compounds from cellulosic material

Patent metadata

Field	Value
Publication number	US-10968191-B2
Application number	US-201916273619-A
Country	US
Kind code	B2
Filing date	Feb 12, 2019
Priority date	Aug 6, 2014
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

The present invention is directed to an energy-efficient and environmentally friendly process for the production of chemical target compounds from cellulosic material. In a further aspect, the present invention is directed to a system for conducting the process according to the inventive process.

First claim

The invention claimed is:

1. A process for the production of chemical target compounds from cellulosic material comprising the steps
a) treating cellulosic material by applying steam;
b) separating the steam containing at least one chemical target compound from the treated cellulosic material;
c) transferring the separated steam to a segregation device;
d) segregating the phase containing the least one chemical target compound from the steam by rectification;
e) subjecting the steam to a utilization step.

2. The process according to claim 1 , wherein the segregation comprises steam transformation of the steam containing the at least one chemical target compound.

3. The process according to claim 2 , wherein the segregation comprises decanting the phase containing the at least one chemical target compound from the transformed steam, resulting in said phase containing the at least one chemical target compound and a residual watery phase.

4. The process according to claim 3 , wherein the residual watery phase is recycled to step d) after decanting the phase containing the at least one chemical target compound.

5. The process according to claim 1 , wherein the utilization step e) is selected from evaporation, drying, heating, sterilizing, energy generating and distillation.

6. The process according to claim 1 , further comprising the step
f) condensing the utilized steam of step e).

7. The process according to claim 6 , further comprising the step
g) recycling of the utilized steam.

8. The process according to claim 7 , wherein the utilized steam is recycled to step a) of the process.

9. The process according to claim 1 , wherein the segregated chemical target compound according to step d) is one or more compounds selected from phenolic compounds, furans4-OH benzyl alcohol, 4-OH benzaldehyde, 4-OH benzoic acid, trimethyl benzaldehyde, 2-furoic acid, coumaric acid, ferulic acid, phenol, guaiacol, veratrole, pyrogallol, pyrogallol mono methyl ether, vanillyl alcohol, vanillin, isovanillin, vanillic acid, isovanillic acid, homovanillic acid, veratryl alcohol, veratraldehyde, veratric acid, 2-O-methyl gallic acid, syringyl alcohol, syringaldehyde, syringic acid, trimethyl gallic acid, homocatechol, ethyl vanillin, creosol, p-methyl anisol, anisaldehyde, anisic acid, furfural, hydroxymethylfurfural, 5-hydroxymethylfurfural, formic acid, acetic acid, levulinic acid, cinnamic acid, coniferyl aldehyde, isoeugenol, hydroquinone and eugenol.

Assignees

• Clariant Int Ltd

Inventors

• Marckmann Henning
• Hortsch Ralf
• Schuth Marco
• Arzt Bernhard

Classifications

• Y02E50/10

  Biofuels, e.g. bio-diesel · CPC title

• B01J20/18

  Synthetic zeolitic molecular sieves · CPC title

• C07C51/31

  of cyclic compounds with ring-splitting · CPC title

• C08H8/00

  Macromolecular compounds derived from lignocellulosic materials {(pretreatment thereof B27N)} · CPC title

• C07D307/50 Primary

  Preparation from natural products · CPC title