Solid/liquid extraction

An extraction, solid technology, applied in food extraction, oil/fat production, fatty acid preparation/refining, etc., can solve problems such as unsatisfactory method and dangerous operation

Inactive Publication Date: 2012-10-10
LAB EXPANSCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Hexane further has the disadvantage of being hazardous to handle due to its physicochemical properties, especially its flash point (-23.3°C) and / or its autoignition temperature (233.9°C)
[0010] Finally, taking into account the yield, selectivity, simplicity, cost, toxicity, convenience, number of steps (particularly extraction) and / or rapidity, methods involving these conventional aliphatic solvents (especially hexane) may not be satisfactory

Method used

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  • Solid/liquid extraction
  • Solid/liquid extraction
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] Example 1: Extraction from Dried Avocado

[0075] Extraction from dried avocado was performed with hexane (reference) and the following solvents: HMDS, MeTHF, BTF, BHF, MTBE, ETBE.

[0076] Dried avocados were crushed and added to cellulose cartouches (30 to 40 g). Extraction was performed in a Soxhlet extractor (BUCHI B-811). Four sets of extractions were then performed in parallel, and each set consisted of 20 extraction / siphon cycles. Once the extraction has been terminated, the extraction solvent is evaporated and the residue from which the solvent has been removed is weighed. The weight yields are then compared. The results are given in Table 1.

[0077] Table 1

[0078]

[0079] This result shows that the solvent according to the invention has an extraction capacity comparable to that of hexane.

[0080] The extracted oil obtained using the solvent according to the invention has a higher content of unsaponifiables relative to hexane; in the case of ETBE ...

Embodiment 2

[0081] Example 2: Extraction from freeze-dried avocado pulp powder

[0082] Freeze-dried avocado pulp powder was extracted according to the method described in Example 1 with hexane (reference) and the following solvents: HMDS, MeTHF, BTF, MTBE, ETBE. The results are given in Table 2.

[0083] Table 2

[0084]

[0085] This result shows that the solvent according to the invention has an extraction capacity comparable to that of hexane.

[0086] The extracted oil obtained using the solvent according to the invention has a higher content of unsaponifiables relative to hexane; in the case of MeTHF the content is increased by 50%.

Embodiment 3

[0087] Example 3: Extraction of oil from dried avocado

[0088] Extraction from dried avocados was performed with hexane (reference) and the following solvents: BTF and ETBE.

[0089] Dried avocados were crushed and added to cellulose cylinders (30 to 40 g). Extraction was performed in a Soxhlet extractor (BUCHI B-811). Four sets of extractions were then performed in parallel, the first set consisting of 5 extraction cycles, the second set consisting of 10 cycles, the third set consisting of 15 cycles and the fourth set consisting of 20 cycles. Once the extraction has been terminated, the extraction solvent is evaporated and the residue from which the solvent has been removed is weighed. The weight yields are then compared.

[0090] The results are given in Table 3 below.

[0091] table 3

[0092]

[0093] The weight yields obtained with ETBE were similar to those obtained with the hexane reference: thus, ETBE provides an alternative to the use of hexane in solid / liq...

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PUM

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Abstract

The invention relates to a method for the solid / liquid extraction of an oil or butter, particularly having a high unsaponifiable content, contained in at least one solid vegetable matter or a micro-organism. The method includes at least the following steps: solid / liquid extraction of at least one solid vegetable matter or a micro-organism using a first solvent system comprising a concentration of solvent selected from among fluorinated aromatic solvents, particularly trifluorotoluene (BTF) and hexafluorobenzene (BHF), tert-butyl ethers, particularly 2-ethoxy-2-methylpropane, also known as ethyl-tert-butyl-ether (ETBE), and 2-methoxy-2-methylpropane or methyl-tert-butylether (MTBE), solvents comprising at least one silicon atom, particularly hexamethyldisiloxane (HMDS) and tetramethylsilane (TMS), methyl-tetrahydrofuran (MeTHF), and mixtures thereof, representing at least 50 vol.-% in relation to the total volume of the solvent system; and, optionally, recovery of a fraction comprising the oil or butter, particularly unsaponifiable enriched. The invention also relates to an unsaponifiable fraction, oil or butter obtained using this method and to compositions containing said oil or fraction.

Description

technical field [0001] The present invention relates to a process for the solid / liquid extraction of oil or butter from solid vegetable matter or microorganisms; in particular, said oil or said butter comprising a high content of unsaponifiables. Background technique [0002] The unsaponifiable or unsaponifiable fraction of the fat consists of compounds which form a fraction of the fat which remains insoluble in water after a sustained action of alkali and which can be extracted with organic solvents. [0003] Most vegetable oil unsaponifiables comprise major classes of substances. These main classes include saturated or unsaturated hydrocarbons, fatty or terpene alcohols, sterols, tocopherols, carotenoid pigments, lutein, and in the case of some oils one or two specific classes. [0004] The usual methods of obtaining unsaponifiables from vegetable oils, aimed at extracting all or part of the main species contained therein, are suitable for the preparation of part or all o...

Claims

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Application Information

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IPC IPC(8): A23L1/30A61K8/97C11B1/10A23L33/00
CPCA61Q19/00C11C3/003A61K8/922C11B1/10A23L1/3006A23L1/30A61K8/97C11C1/025A23L1/3002A61K8/99A61K35/74A61K36/02A61K36/06A61K36/185A61K36/28A61K36/286A61K36/30A61K36/31A61K36/32A61K36/42A61K36/47A61K36/48A61K36/52A61K36/54A61K36/55A61K36/66A61K36/736A61K36/81A61K36/87A61K36/889A61K36/899A23V2002/00A23V2200/30A23V2200/318A23V2250/21A23V2300/14A23L33/10A23L33/105A23L33/115A61K8/9722A61K8/9728A61K8/9789A61K8/9794A61P1/02A61P17/00A61P17/02A61P17/16A61P19/02A61P19/04A61P3/02A23L33/145A23L33/29A23L33/26A23L13/45A61K8/9706
Inventor A·索努瓦J·勒格朗E·梅尔切尔
Owner LAB EXPANSCIENCE
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