AU2948892A - Cereal extracts - Google Patents

Cereal extracts

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Publication number
AU2948892A
AU2948892A AU29488/92A AU2948892A AU2948892A AU 2948892 A AU2948892 A AU 2948892A AU 29488/92 A AU29488/92 A AU 29488/92A AU 2948892 A AU2948892 A AU 2948892A AU 2948892 A AU2948892 A AU 2948892A
Authority
AU
Australia
Prior art keywords
cereal
mixture
extract
cereal extract
solids
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.)
Granted
Application number
AU29488/92A
Other versions
AU670420B2 (en
Inventor
Roderick Norman Greenshields
Artis Llywelyn Rees
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Unilever Bestfoods North America
Original Assignee
Unilever Bestfoods North America
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from GB919124427A external-priority patent/GB9124427D0/en
Priority claimed from GB929209094A external-priority patent/GB9209094D0/en
Application filed by Unilever Bestfoods North America filed Critical Unilever Bestfoods North America
Publication of AU2948892A publication Critical patent/AU2948892A/en
Application granted granted Critical
Publication of AU670420B2 publication Critical patent/AU670420B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P19/00Preparation of compounds containing saccharide radicals
    • C12P19/14Preparation of compounds containing saccharide radicals produced by the action of a carbohydrase (EC 3.2.x), e.g. by alpha-amylase, e.g. by cellulase, hemicellulase
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/28Polysaccharides or their derivatives
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/40Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing ingredients of undetermined constitution or reaction products thereof, e.g. plant or animal extracts
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61LMETHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L26/00Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form
    • A61L26/0009Chemical aspects of, or use of materials for, wound dressings or bandages in liquid, gel or powder form containing macromolecular materials
    • A61L26/0023Polysaccharides
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B1/00Preparatory treatment of cellulose for making derivatives thereof, e.g. pre-treatment, pre-soaking, activation
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B37/00Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
    • C08B37/0006Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
    • C08B37/0057Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid beta-D-Xylans, i.e. xylosaccharide, e.g. arabinoxylan, arabinofuronan, pentosans; (beta-1,3)(beta-1,4)-D-Xylans, e.g. rhodymenans; Hemicellulose; Derivatives thereof
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08BPOLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B37/00Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
    • C08B37/006Heteroglycans, i.e. polysaccharides having more than one sugar residue in the main chain in either alternating or less regular sequence; Gellans; Succinoglycans; Arabinogalactans; Tragacanth or gum tragacanth or traganth from Astragalus; Gum Karaya from Sterculia urens; Gum Ghatti from Anogeissus latifolia; Derivatives thereof
    • CCHEMISTRY; METALLURGY
    • C12BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12PFERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
    • C12P19/00Preparation of compounds containing saccharide radicals
    • C12P19/04Polysaccharides, i.e. compounds containing more than five saccharide radicals attached to each other by glycosidic bonds

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biochemistry (AREA)
  • Zoology (AREA)
  • Wood Science & Technology (AREA)
  • Animal Behavior & Ethology (AREA)
  • Medicinal Chemistry (AREA)
  • Epidemiology (AREA)
  • Polymers & Plastics (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • General Chemical & Material Sciences (AREA)
  • Biotechnology (AREA)
  • Hematology (AREA)
  • Microbiology (AREA)
  • Molecular Biology (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • General Engineering & Computer Science (AREA)
  • Genetics & Genomics (AREA)
  • Botany (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Cereal-Derived Products (AREA)
  • Coloring Foods And Improving Nutritive Qualities (AREA)

Description

CEREAL EXTRACTS
This invention relates to a process for producing cereal extracts.
The use of corn bran extracts as bulking agents in 5 food products is well-known. US 4927654 discloses a process for producing hemicellulose extracts from delignified plant fibres, such as corn bran, by extracting the plant fibres with sodium hydroxide solution and acidifying the resulting mixture to 0 precipitate a first hemicellulose fraction. A second hemicellulose fraction is precipitated from the resulting filtrate by the addition of ethanol.
The present invention provides a process for producing 5 two novel extracts from cereal-derived material.
Accordingly, the present invention provides a process for producing a hemicellulose-based cereal extract comprising the steps of: 0
(i) milling cereal material;
( ii) suspending the milled material in an aqueous liquid; (iii) treating the resulting suspension with an 5 alkali;
(iv) lowering the pH of the treated suspension to from 5 to 7 ; and (v) separating the solid and the liquid in the resulting mixture. 0
The cereal material is preferably milled (either in wet or dry form) to a particle size of from 50 to 250 μm e.g., 80 to 180 μm. The aqueous liquid in which the milled cereal material is suspended is preferably c water but may also be a solution or a suspension of other substances in water provided that this does not adversely interfere with the subsequent steps in the process. The suspension preferably contains from 5 to 10% (e.g., 8%) dry weight/volume of milled corn bran 5 and may be formed at ambient temperature.
The cereal material is preferably cereal husk or bran and may be obtained from cereals such as maize, corn, barley, wheat, rice or oats, or malt or malt culms. -JO Preferably the cereal material is corn bran. The milled material may be air classified or sieved to removal starch and may comprise starch removed by suitable enzyme treatment, for example, with diatase (alpha- or beta-amylase) .
15
Many alkalis may be used to effect the alkaline treatment step (step (iii)) of the process e.g., metal hydroxides such as sodium and potassium hydroxides or metal carbonates such as sodium or calcium carbonate.
20 Preferably, potassium hydroxide (e.g., in the form of a solid) is added to the suspension to provide a concentration of not less than 4% w/v of KOH. The mixture may be stirred to dissolve the potassium hydroxide. This is accompanied by a colour change to
2 bright yellow or orange. The mixture is preferably heated to from 70° to 80°C for from V_ to 2 hours in order to effect maximum extraction or until a rapid increase in viscosity is noticed. The reaction mixture is then adjusted to a pH of from 5 to 7 (e.g.,
•3 neutral pH) with an. acid (e.g., dilute or concentrated hydrochloric acid). This may be accompanied by a visible paling in colour and "clouding" of the material. The extract is preferably separated from the insoluble material by filtration through a coarse 5 filter (e.g., grade 0 sintered glass at lab scale/5-50 μm plastic mesh on larger scale) with the application of partial vacuum or by centrifugation.
The insoluble material may be washed in situ on the filter with warm water to give the desired degree of extraction. Extraction by this process typically yields 45-55% of the dry weight of the material.
The extract may be purified in the following manner:
1 Extracts and washings are combined and diluted such that the total dissolved solids are in the region of 2.5% w/v.
2 The diluted extract is applied to a tangential flow ultrafiltration apparatus. (Under the following conditions during a pilot scale trial).
Starting volume 100 litres Membrane area 6 m2 Membrane configuration parallel tubes Membrane type polysulphone 15,000 mwco Average flux rate 9 to 10 litres m~2.h-1 Run time 85 min
The concentrated retentate was diluted with 30 1 of water and the operation repeated three times before the solids content of the filtrate approaches zero.
Further decolourisation and deodorisation may be achieved by passing the diluted desalted filtrate over a carbon column containing Anthrosorb for odour removal and Norit C for colour removal.
The extract which at this stage is quite viscous may be dried by freeze drying, vacuum drying or spray drying. The extract is essentially an alkali-soluble complex hemicellulose mixture.
The extract may be used as a bulking agent or a thickening agent (e.g., in food products) and has adhesive properties.
A second cellulose-containing extract may be obtained by the following process. The extract may be produced as an insoluble bleached cellulose residue of alkaline extracted cereal material (e.g., cell walls of maize bran) and may contain other insoluble biopolymers besides cellulose.
In a further embodiment, therefore, the present invention provides a cellulose-containing extract produced by the process comprising the steps of:
(i) milling cereal material; (ϋ) suspending the milled cereal material in an aqueous liquid; (iii) treating the resulting suspension with an alkali; (iv) lowering the pH of the treated suspension to from 5 to 7;
(v) separating the solid and liquid in the resulting mixture, (vi) washing the solids; and (vii) drying the washed solids.
The insoluble material obtained from alkali extraction of the hemicellulosic material after step (v) may be resuspended in water to give a from 2 to 5%, preferably from 2.5 to 3.0% w/v, suspension in water. The pH is adjusted to 12.2-12.5 preferably by adding 40% w/v potassium hydroxide solution.
>*¥ After raising the temperature (e.g., to from 70 to
75°C) in an indirectly heated vessel, hydrogen ? 5 peroxide (e.g., 30 vol or 10 vol) is added preferably in an amount such that the peroxide is present at an amount of from 15 to 20% dry wt/dry wt insoluble material. The temperature is maintained, with gentle stirring, at the elevated temperature (such as from 70 10 to 75°C) for from 2 to 5 hours (e.g. , 3-4 hours). Allowance should be made in the capacity of the vessel for up to 20% foaming on addition of peroxide. The suspension may be stored for some days at this stage without loss or damage.
15
Following the reaction with peroxide, the pH of the suspension is lowered to below 7 (e.g., from 5.5 to 6.0) with an acid such as hydrochloric acid. Solubilised material is preferably removed by
20 filtration under partial vacuum. (Grade 0 sintered glass filter on laboratory scale, 5-50 μm plastic mesh on larger scale).
The insoluble material may then be washed on the 25 filter with water, preferably with at least 3 volumes of water. The washed material may be stored aseptically , or suspended and spray dried.
This extract can be used as a bulking agent in 30 foodstuffs but also possesses lipomimetic properties.
The present invention thus allows the production of -_- both an insoluble polysaccharide and an alkali soluble polysaccharide which may be used as food ingredients.

Claims (1)

  1. Claims
    1 A hemicellulose-based cereal extract produced by the process comprising the steps of:
    (i) milling cereal material;
    (ii) suspending the milled cereal material in an aqueous liquid; (iii) treating the resulting suspension with an alkali; (iv) lowering the pH of the treated suspension to from 5 to 7 ; and (v) separating the precipitated solids and the liquid in the resulting mixture.
    2 A cereal extract as claimed in claim 1, wherein the cereal material is husk or bran.
    3 A cereal extract as claimed in claim 1 or claim 2, wherein the cereal is corn.
    4 A cereal extract as claimed in claims 1 to 3 , wherein the suspension formed in step (ii) contains from 5 to 10% dry weight/volume of milled cereal material.
    5 A cereal extract as claimed in claims 1 to 4 , wherein in step (i) the cereal material is milled to a size of from 50 to 250 μ , preferably 80 to 180 μm.
    6 A cereal extract as claimed in claims 1 to 5, wherein step (iii) comprises the addition of potassium hydroxide in an amount such that the mixture contains potassium hydroxide at a concentration of at least 4% weight/volume and maintaining the mixture for a time and at a temperature until a rapid increase in the viscosity of the mixture occurs.
    7 A cereal extract as claimed in claim 6, wherein the mixture is maintained at from 70 to 80°C for from 1^2 to 2 hours.
    8 A cereal extract as claimed in claims 1 to 7 , wherein the separation in step (v) is effected by
    10 filtration.
    9 A cereal extract as claimed in claims 1 to 8 , wherein the process further comprises the steps of:
    ■J (vi) purifying the separated liquid; and (vii) drying the purified liquid.
    10 A cereal extract as claimed in claim 9, wherein the liquid is purified by ultrafiltration and, 0 optionally, treatment with activated carbon.
    11 A cereal extract as claimed in claim 9 or claim 10, wherein the purified liquid is dried by freeze drying, vacuum drying or spray drying. 5
    12 A cellulose-containing cereal extract produced by the process comprising the steps of:
    (i) milling cereal material; 0 ( ϋ) suspending the milled cereal material in an aqueous liquid; (iii) treating the resulting suspension with an alkali; (iv) lowering the pH of the treated suspension to from 5 to 7; (v) separating the precipitated solids and the liquid in the resulting mixture, (vi) washing the solids; and (vii) drying the washed solids.
    13 A cereal extract as claimed in claim 12, wherein between steps (v) and (vi) the process further comprises the steps:
    (a) resuspending the separated solids in an aqueous liquid;
    (b) raising the pH of the resulting suspension;
    (c) treating the mixture with hydrogen peroxide;
    (d) lowering the pH of the mixture to below 7; and (e) separating the solids from the mixture;
    14 A cereal extract as claimed in claim 13, wherein in step (a) the suspension contains from 2 to 5% w/v separated solids.
    15 A cereal extract as claimed in claim 13 or claim 14, wherein in step (b) the pH of the suspension is raised to from 12 to 13 by the addition of potassium hydroxide solution.
    16 A cereal extract as claimed in claims 13 to 15, wherein in step (c) hydrogen peroxide is added in an amount to give from 15 to 20% weight hydrogen peroxide/weight insoluble material and the mixture maintained at from 70 to 80βC for from 2 to 5 hours.
    17 A cereal extract as claimed in claims 13 to 16, wherein in step (d) the pH of the mixture is lowered to from 5.5 to 6.0 with hydrochloric acid. 18 A cereal extract as claimed in claims 13 to 17, wherein in step (e) the solids are separated from the mixture by filtration.
AU29488/92A 1991-11-16 1992-11-16 Cereal extracts Ceased AU670420B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB919124427A GB9124427D0 (en) 1991-11-16 1991-11-16 Gel production from plant matter
GB929205406A GB9205406D0 (en) 1991-11-16 1992-03-12 Gel protection from plant matter
GB929209094A GB9209094D0 (en) 1991-11-16 1992-04-27 Gel production from plant matter
PCT/GB1992/002122 WO1993010157A1 (en) 1991-11-16 1992-11-16 Cereal extracts

Publications (2)

Publication Number Publication Date
AU2948892A true AU2948892A (en) 1993-06-15
AU670420B2 AU670420B2 (en) 1996-07-18

Family

ID=27265931

Family Applications (2)

Application Number Title Priority Date Filing Date
AU29335/92A Abandoned AU2933592A (en) 1991-11-16 1992-11-16 Gel production from plant matter
AU29488/92A Ceased AU670420B2 (en) 1991-11-16 1992-11-16 Cereal extracts

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AU29335/92A Abandoned AU2933592A (en) 1991-11-16 1992-11-16 Gel production from plant matter

Country Status (4)

Country Link
AU (2) AU2933592A (en)
RU (1) RU2119758C1 (en)
TJ (1) TJ201B (en)
WO (2) WO1993010158A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BR9508350A (en) 1994-07-26 1997-11-04 Novo Nordisk As Process for causing gelation or increasing viscosity of an aqueous medium containing polymeric material prone to gelation
GB2322864A (en) 1997-03-07 1998-09-09 Polybiomed Ltd Gel for application to the human or animal body
AU747863B2 (en) 1997-03-20 2002-05-23 Cambridge Biopolymers Limited Improvements relating to bran gels
WO1999032652A1 (en) * 1997-12-19 1999-07-01 Novo Nordisk A/S Modification of polysaccharides by means of a phenol oxidizing enzyme
US6352845B1 (en) 1999-02-10 2002-03-05 Eastman Chemical Company Corn fiber for the production of advanced chemicals and materials: separation of monosaccharides and methods thereof
DE10010362A1 (en) * 2000-03-07 2001-09-13 Suat Soenmez Fat-based cream containing extract of wheat-straw, used for protecting body parts, e.g. hands and feet, against cold, prepared by heating fat with straw
DE10109502A1 (en) 2001-02-28 2002-09-12 Rhodia Acetow Gmbh Removal of hemicellulose from biomaterial, especially wood pulp, involves extraction by treatment with an aqueous solution of metal complex, e.g. nickel tris-2-aminoethyl-amine di-hydroxide
US20030017221A1 (en) * 2001-03-28 2003-01-23 Grain Processing Corporation Enzymatically catalyzed hydrolysis of corn fiber and products obtained from enzymatically hydrolyzed corn fiber
DE102005026223A1 (en) * 2005-06-07 2006-12-14 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Stable hemicellulose paste, process for its preparation and its use
CN103270052B (en) * 2010-11-23 2017-09-19 艾克海丽克斯有限责任公司 A method for increasing the molecular weight of xylomannans and xylans comprising aromatic moieties
CN103547171A (en) * 2011-03-24 2014-01-29 雀巢产品技术援助有限公司 Method for providing a whole grain cereal based extract
GB2506125A (en) * 2012-09-20 2014-03-26 Cargill Inc Method for extraction and isolation of arabinoxylan products from debranned cereal

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2709699A (en) * 1952-07-18 1955-05-31 Michael J Wolf Extracting hemicelluloses
US2801955A (en) * 1955-11-17 1957-08-06 Nat Starch Products Inc Process for extraction of hemicellulose
US4239906A (en) * 1979-06-07 1980-12-16 Standard Brands Incorporated Method for obtaining a purified cellulose product from corn hulls
US4649113A (en) * 1983-12-28 1987-03-10 The United States Of America As Represented By The Secretary Of Agriculture Alkaline peroxide treatment of nonwoody lignocellulosics
JP2683391B2 (en) * 1988-11-30 1997-11-26 日清製粉株式会社 Sustained release composition based on hemicellulose from wheat bran
US5271943A (en) * 1989-10-27 1993-12-21 Scott Health Care Wound gel compositions containing sodium chloride and method of using them

Also Published As

Publication number Publication date
WO1993010158A1 (en) 1993-05-27
AU670420B2 (en) 1996-07-18
AU2933592A (en) 1993-06-15
WO1993010157A1 (en) 1993-05-27
RU2119758C1 (en) 1998-10-10
TJ201B (en) 1998-11-14

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