DE10145257A1 - A method for separating the aleuron skin from wheat uses the difference in electrical properties between the aleuron and the shell particles in an electric field. - Google Patents
A method for separating the aleuron skin from wheat uses the difference in electrical properties between the aleuron and the shell particles in an electric field.Info
- Publication number
- DE10145257A1 DE10145257A1 DE10145257A DE10145257A DE10145257A1 DE 10145257 A1 DE10145257 A1 DE 10145257A1 DE 10145257 A DE10145257 A DE 10145257A DE 10145257 A DE10145257 A DE 10145257A DE 10145257 A1 DE10145257 A1 DE 10145257A1
- Authority
- DE
- Germany
- Prior art keywords
- particles
- aleurone
- electrical
- electrical state
- shell
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C7/00—Separating solids from solids by electrostatic effect
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C5/00—Sorting according to a characteristic or feature of the articles or material being sorted, e.g. by control effected by devices which detect or measure such characteristic or feature; Sorting by manually actuated devices, e.g. switches
- B07C5/34—Sorting according to other particular properties
- B07C5/344—Sorting according to other particular properties according to electric or electromagnetic properties
Abstract
Description
Die Erfindung bezieht sich auf ein Verfahren zum Gewinnen von reinem Aleuron aus einem aus Aleuronteilchen und Schalenteilchen bestehendem Gemisch gemäss dem Oberbegriff von Anspruch 1. The invention relates to a method for obtaining pure aleuron a mixture consisting of aleurone particles and shell particles according to the Preamble of claim 1.
Aleuron, insbesondere das Aleuron des Weizenkorns, ist ein ernährungsphysiologisch hochwertiger Bestandteil des Weizens. Man ist daher bestrebt, die zwischen der Schale des Weizenkorns und dem Mehlkörper des Weizenkorns angeordnete Aleuronschicht möglichst vollständig und ohne Verunreinigungen durch Nicht-Aleuronteilchen zu gewinnen. Hierzu wird zunächst die aus Aleuronschicht und Schale bestehende Weizenkleie von dem Mehlkörper des Weizenkorns abgelöst. Diese Ablösung der Kleie vom Weizenkorn erfolgt durch die üblichen Bearbeitungsstufen in einer Mühle. Aleuron, especially the wheat grain aleuron, is a nutritional one high quality component of wheat. One therefore strives to be between the shell of the wheat grain and the flour body of the wheat grain arranged aleurone layer as completely as possible and without contamination by non-aleurone particles win. For this purpose, the layer consisting of aleurone and shell is first used Wheat bran detached from the flour of the wheat grain. This detachment of the bran from Wheat grain is processed through the usual processing steps in a mill.
In einer weiteren Trennstufe wird dann die Kleie mechanisch beansprucht, um die Aleuronbestandteile von den Schalenteilen zu trennen. Anschliessend wird das Feingut z. B. mittels eines Windsichters aus der Mahlfraktion abgetrennt ("das Mehl wird herausgeblasen"). Dies ist notwendig, da die Feingutteilchen (das Mehl) ansonsten die Feinsiebe der anschliessenden Klassierungsstufe aufgrund des Stärke- und Proteinanteils verkleben würde. Auf diese Weise lässt sich dann eine gute Trennschärfe der Klassen erzielen. Anschliessend werden Schalenteilchen von Aleuronteilchen durch weitere Windsichtung getrennt. Es hat sich jedoch gezeigt, dass die aus der Furche der Schale stammenden Furcheteilchen sich im Gegensatz zu den nicht aus der Furche stammenden Schalenteilchen von den Aleuronteilchen durch Windsichten und Sieben nicht trennen lassen. Die Furcheteilchen gleichen sowohl in ihrer Form als auch in ihrer Dichte den Aleuronteilchen. In a further separation stage, the bran is then mechanically stressed in order to Separate the aleurone components from the shell parts. Then the fines are z. B. separated from the grinding fraction by means of an air classifier ("the flour becomes blown out "). This is necessary because the fine particles (the flour) otherwise the fine sieves the subsequent classification level based on the starch and protein content would stick. In this way, the classes can be clearly distinguished achieve. Then shell particles of aleurone particles are replaced by others Separation of wind. However, it has been shown that from the furrow of the shell Furrow particles, in contrast to those not from the furrow Shell particles originating from the aleurone particles by air sighting and sieving do not let separate. The furrow particles are the same both in shape and in density the aleuron particles.
Die Anwesenheit der aus der Schale stammenden Furcheteilchen unter den Aleuronteilchen stellt eine Wertminderung des gewonnenen Aleurons dar. Zunächst einmal wirken sich die dunklen Furcheteilchen zwischen den weissen Aleuronteilchen rein optisch störend aus. Darüber hinaus ist aber auch in den Furcheteilchen mit einer hohen Konzentration an Bakterien, Pilzen sowie auch an Pestiziden zu rechnen. The presence of the furrow particles from the shell among the Aleuron particles represent an impairment of the aleuron obtained. First of all the dark furrow particles between the white aleurone particles have a purely optical effect annoying. In addition, the furrow particles also have a high Concentration of bacteria, fungi and pesticides.
Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, die aus der Schale stammenden ungewollten Furcheteilchen von den Aleuronteilchen auszusondern. The present invention is therefore based on the object, the shell separate unwanted furrow particles from the aleuron particles.
Diese Aufgabe wird durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst. This object is achieved by the characterizing features of claim 1.
Überraschenderweise hat sich nämlich gezeigt, dass es durchaus möglich ist, die Aleuronteilchen von den Furcheteilchen aufgrund ihrer unterschiedlichen elektrischen Eigenschaften (Dielektrizitätskonstante, Volumenwiderstand, Oberflächenwiderstand) in einem elektrischen Feld voneinander zu trennen. Surprisingly, it has been shown that it is quite possible that Aleuron particles from the furrow particles due to their different electrical Properties (dielectric constant, volume resistance, surface resistance) in an electrical field.
Insbesondere kann die Trennung der Aleuronteilchen von den Furcheteilchen durch unterschiedliches Aufladen der Aleuronteilchen und der Furcheteilchen und anschliessendes Bewegen der unterschiedlich aufgeladenen Teilchen durch ein elektrisches Feld erfolgen (Elektrophorese). Die unterschiedliche Aufladung der Aleuronteilchen und der Furcheteilchen kann dabei durch Ionenbeschuss (Korona-Ladung), durch Leitungsinduktion oder auch durch Kontaktelektrizität (Reibungselektrizität) erfolgen. In particular, the separation of the aleurone particles from the furrow particles can be accomplished by different charging of the aleuron particles and the furrow particles and then moving the differently charged particles through an electric field done (electrophoresis). The different charging of the aleuron particles and the Furrow particles can be caused by ion bombardment (corona charge) Line induction or by contact electricity (friction electricity).
Alternativ kann die Trennung der Aleuronteilchen von den Furcheteilchen auch durch unterschiedlich starke Polarisation der Aleuronteilchen und der Furcheteilchen erfolgen, die dann durch eine inhomogenes elektrisches Feld bewegt werden (Dielektrophorese). Alternatively, the separation of the aleurone particles from the furrow particles can also be carried out by polarization of the aleurone particles and the furrow particles takes place to different degrees, which are then moved by an inhomogeneous electric field (dielectrophoresis).
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10145257A DE10145257A1 (en) | 2001-09-13 | 2001-09-13 | A method for separating the aleuron skin from wheat uses the difference in electrical properties between the aleuron and the shell particles in an electric field. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10145257A DE10145257A1 (en) | 2001-09-13 | 2001-09-13 | A method for separating the aleuron skin from wheat uses the difference in electrical properties between the aleuron and the shell particles in an electric field. |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10145257A1 true DE10145257A1 (en) | 2003-04-03 |
Family
ID=7698977
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10145257A Withdrawn DE10145257A1 (en) | 2001-09-13 | 2001-09-13 | A method for separating the aleuron skin from wheat uses the difference in electrical properties between the aleuron and the shell particles in an electric field. |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10145257A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH361183A (en) * | 1956-04-23 | 1962-03-31 | Gen Mills Inc | Method and device for the electrostatic separation of solid mixtures |
EP0176572B1 (en) * | 1984-04-02 | 1992-01-22 | La Trobe University | Recovery of aleurone cells from wheat bran |
WO1999043437A1 (en) * | 1998-02-26 | 1999-09-02 | Anglo American Research Laboratories (Proprietary) Limited | Method and apparatus for separating particles by electric fields |
-
2001
- 2001-09-13 DE DE10145257A patent/DE10145257A1/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH361183A (en) * | 1956-04-23 | 1962-03-31 | Gen Mills Inc | Method and device for the electrostatic separation of solid mixtures |
EP0176572B1 (en) * | 1984-04-02 | 1992-01-22 | La Trobe University | Recovery of aleurone cells from wheat bran |
WO1999043437A1 (en) * | 1998-02-26 | 1999-09-02 | Anglo American Research Laboratories (Proprietary) Limited | Method and apparatus for separating particles by electric fields |
Non-Patent Citations (1)
Title |
---|
JP 04114753 A.,In: Patent Abstracts of Japan * |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OM8 | Search report available as to paragraph 43 lit. 1 sentence 1 patent law | ||
8141 | Disposal/no request for examination |