SOLVENT EXTRACTION PROCESS

Title:

SOLVENT EXTRACTION PROCESS

Document Type and Number:

WIPO Patent Application WO/2000/064555

Kind Code:

A2

Abstract:

A process for extracting a compound or composition of matter from a raw material containing that compound or composition as a constituent part is described. The process comprises the steps of (1) contacting the raw material with an extraction solvent comprising a pentafluoropropane so as to extract the compound or composition from the raw material into the solvent, and (2) separating the solvent containing the extracted compound or composition from the raw material. The process is particularly adapted for extracting flavours and fragrances from materials of plant origin.

Inventors:

HILL CLAIRE ELIZABETH (GB)
DOWDLE PAUL ALAN (GB)
CORR STUART (GB)

Application Number:

PCT/GB2000/001554

Publication Date:

November 02, 2000

Filing Date:

April 20, 2000

Export Citation:

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Assignee:

ICI PLC (GB)
HILL CLAIRE ELIZABETH (GB)
DOWDLE PAUL ALAN (GB)
CORR STUART (GB)

International Classes:

A01N65/10; A61K8/00; A01N65/28; A61Q13/00; B01D11/02; C07B63/00; C07C7/10; C07C9/16; C07C13/20; C07C13/32; C07C13/40; C07C13/605; C07C29/76; C07C33/02; C07C41/36; C07C43/215; C07C43/23; C07C45/79; C07C47/575; C07C49/225; C07C49/597; C07C51/47; C07C63/06; C07C67/56; C07C69/157; C11B9/02; (IPC1-7): B01D11/00

Domestic Patent References:

WO1995026794A1

1995-10-12

Foreign References:

EP0616821A1	1994-09-28
US5562857A	1996-10-08

Attorney, Agent or Firm:

Dee, Ian M. (Eric Potter Clarkson Park View House 58 The Ropewalk Nottingham NG1 5DD, GB)

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Claims:

1.

A process for extracting a compound or composition of matter from a raw material containing that compound or composition as a constituent part, which process comprises the steps of (1) contacting the raw material with an extraction solvent comprising a pentafluoropropane so as to extract the compound or composition from the raw material into the solvent, and (2) separating the solvent containing the extracted compound or composition from the raw material.

2.	A process as claimed in claim 1, wherein the raw material is of plant origin and the composition to be extracted is a flavour or a fragrance.

3.	A process as claimed in claim 2, wherein the flavour or fragrance is comprised in an oil.

4.	A process as claimed in claim 1, wherein the compound or composition to be extracted from the raw material comprises a biologically active compound or a precursor thereof.

5.	A process as claimed in claim 4, wherein the biologically active compound is a pesticide or a precursor thereof.

6.	A process as claimed in claim 4, wherein the biologically active compound is a pharmaceutically active substance or a precursor thereof.

7.

A process as claimed in any one of the preceding claims, wherein the extraction solvent comprises at least one pentafluoropropane selected from the group consisting of 1,1,1,3,3pentafluoropropane (R245fa), 1,1,2,2,3pentafluoropropane (R245ca), 1,1,1,2,3pentafluoropropane (R245eb) and 1,1,2,3,3pentafluoropropane (R245ea).

8.	A process as claimed in claim 7, wherein the extraction solvent comprises 1,1,1,3,3pentafluoropropane (R245fa).

9.	A process as claimed in any one of the preceding claims, wherein the extraction solvent comprises a cosolvent in addition to the pentafluoropropane.

10.	A process as claimed in claim 9, wherein the cosolvent comprises at least one C24 hydrocarbon.

11.	A process as claimed in claim 10, wherein the C24 hydrocarbon is selected from the alkanes and cycloalkanes.

12.	A process as claimed in claim 11, wherein the cosolvent comprises at least one compound selected from ethane, npropane, ipropane, n butane and ibutane.

13.	A process as claimed in claim 12, wherein the cosolvent comprises nbutane.

14.	A process as claimed in claim 9, wherein the cosolvent comprises at least one hydrocarbon ether having the formula R'OR2 in which RUZ and R2 are independently Cl aLtyl groups.

15.	A process as claimed in claim 14, wherein the cosolvent comprises at least one ether selected from dimethyl ether, methyl ethyl ether and diethyl ether.

16.	A process as claimed in claim 15, wherein the cosolvent comprises dimethyl ether.

17.	A process as claimed in any one of the preceding claims, wherein the extraction solvent is in liquid form.

18.	A process as claimed in any one of the preceding claims which is conducted at a temperature in the range of from60 to 150°C.

Description:

INTERNATIONALSEARCHREPORT !----------------) Inten.galApplicationNo ...rarrnationon patenttamily members PatentdocumentPublication Patentfamily Publication citedinsearchreportdate member(s)date WO9526794A12-10-1995AU 678104 B 15-05-1997 AU 1897095 A 23-10-1995 BR 9507212 A 09-09-1997 CA 2185422 A 12-10-1995 CN 1147208 A 09-04-1997 EP 0752903 A 15-01-1997 JP 9510913 T 04-11-1997 NZ 281989 A 27-05-1998 EP0616821A28-09-1994GB 2276392 A 28-09-1994 CA 2115599 A 23-08-1994 IL 108652 A 15-07-1998 US 5512285 A 30-04-1996 US5562857A08-10-1996BR 9606137 A 03-11-1998 CA 2188236 A 23-06-1997 EP 0783017 A 09-07-1997 JP 9176059 A 08-07-1997

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