CN102372791A - Preparation process of pectin with maize straw - Google Patents
Preparation process of pectin with maize straw Download PDFInfo
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- CN102372791A CN102372791A CN2010102494506A CN201010249450A CN102372791A CN 102372791 A CN102372791 A CN 102372791A CN 2010102494506 A CN2010102494506 A CN 2010102494506A CN 201010249450 A CN201010249450 A CN 201010249450A CN 102372791 A CN102372791 A CN 102372791A
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Abstract
The invention discloses a preparation process of pectin with maize straw. The pectin is prepared by using maize straw as raw material and carrying out raw material processing, water extraction, precipitation, washing, drying and pulverization, wherein, the precipitation step can be realized by concentrating the extract and then adding alcohol precipitators, or directly adding alcohol precipitators without concentrating, adding alkali to adjust pH value and precipitating the pectin; the washing step can be realized by using alcohols and acidized ethanol as the washing agent to remove impurities. The invention has the advantages of wide raw material source, easy collection of raw material, low price of raw material, and high content of soluble pectin. According to the invention, water is directly used for repeated extraction, the preparation process has no need of special acid-resistant corrosion-resistant extraction devices and facilities, the investment is small, the work is convenient, and pollution is little.
Description
Technical field
The present invention relates to eat the additive manufacture field, particularly a kind of corn straw prepares pectin technology.
Background technology
At present, industrial pectin mainly is that to press the pomace behind the juice with the pericarp of citrus fruits and apple be raw material, and remaining floral disc serves as that the raw material of producing pectin constantly draws attention after the sunflower seeds to divest.In a word, the raw material of producing pectin should be that the source is wide, easily collecting, and low price and content are higher.Above raw material production pectin needs to heat lixiviate with dilute acid soln, and the acids that can supply select for use is a lot, such as hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, Hydrocerol A, tartrate etc.; Decide according to raw material type, requirement of products etc.; Generally pH value less than 3 condition in extracting, need special equipment that prevents acid attack and facility, such as employing stainless steel and acid-proof floor; Investment cost increases like this, and the chance of contaminate environment increases.
Summary of the invention
The purpose of this invention is to provide a kind of is the method for raw material production pectin with the corn straw.These raw material sources are abundant, collect easily, and low price and soluble pectin content are high.In process of production, directly water need not acid for adjusting pH value as extract, and mild condition is pollution-free, does not need erosion-resisting material and facility.
The production technique of present method comprises raw material processing, water extraction, deposition, washing, drying, pulverizing finished product.
(1) raw material is handled: foreign material such as the corn straw after will gathering in the crops (comprising stem, leaf, fringe, root) water flush away dust, air-dry to water cut 5%-15%, then, it is granular that the corn straw after air-dry is ground into 2-5mm.
(2) water extraction: corn straw after will handling and water by solid-liquid (g/mL) than being 1: 10-30, temperature 30-95 ℃, extracted 5-60 minute, filter, filter cake extracts 2 to 4 times by the same condition more repeatedly, collects filtrating.
(3) deposition: this technology provides two kinds of intermediate processings, one of which. and the pure precipitator method: the vacuum concentration of will filtrating adds precipitation agent to pectin content 5-15%, and precipitation agent can be methyl alcohol, ethanol, Virahol; They are two years old. salt precipitation method: the filtrating that obtains is extracted in (2) directly add saturated salt solution, regulate the pH value to 3-5 with alkali then without concentrating.
(4) washing: the pectin that the pure precipitator method obtain is removed pigment, soluble sugar with methyl alcohol, ethanol or Virahol repetitive scrubbing; The pectin deposition that salt precipitation method is obtained is replaced metals ion wherein with acidifying ethanol (80% to 100% ethanol and hydrochloric acid by 6: 1 to 4: 1 mixed) earlier, use 80% to 100% methyl alcohol, ethanol or washed with isopropyl alcohol extremely not hydrochloric again till.
(5) drying: the pectin that washing is obtained is dry below 60 ℃.
(6) pulverize:, carry out stdn by specific requirement with dried pectin crushing screening.
Major advantage of the present invention is:
One of which. corn straw is the waste in the agriculture prodn, and raw material sources are wide, easily collecting, low price.
They are two years old. and soluble pectin content is directly used water extraction up to 21%, saves with acid and transfers the pH operation, and mild condition does not need acid-resistant system and facility, and cost is low.
They are three years old. and pollute few: leaching process is without acid for adjusting pH value, if adopt pure deposition can realize CR production.
Description of drawings
Accompanying drawing is a process flow sheet of the present invention
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described further.
Shown in accompanying drawing: the present invention be a kind of be raw material with the corn straw, process pectin through raw material processing, water extraction, deposition, washing, drying, pulverizing.Intermediate processing comprises pure method deposition and salt method depositing technology.
Embodiment one.
The corn straw that produce in Guangzhou, 2Kg Guangdong is cleaned back and air-dry to water cut 5%-15%, use the Material disintegrator grinding and sieving, collect the 2-5mm granular feedstock.Compare 1 by solid-liquid (g/mL): 25-30 adds entry, at temperature 60-70 ℃, extracts 10-20 minute, filters, and filter cake extracts 3 times by the same condition more repeatedly, collects filtrating.The extracting solution vacuum concentration to pectin content 10-15%, is pressed ethanol and liquid concentrator volume than 1: 1-2: 1 adds 95% ethanol, and deposition obtains crude pectin.Carry out repetitive scrubbing to there not being the stripping of look foreign pigment with 95% pair of crude pectin that obtains.Washed pectin is dry under 60 ℃, to pulverize and obtain finished product, its yield is 19-20%.
Embodiment two.
Directly add saturated alum liquor with obtaining extracting solution among the embodiment one; Regulating pH to 4 with ammoniacal liquor then makes it separate out deposition; Use acidifying ethanol (80% ethanol and hydrochloric acid made by 4: 1) conversion metallic aluminium wherein after filtering, use 95% washing with alcohol till not hydrochloric again.Washed pectin is dry under 60 ℃, to pulverize and obtain finished product, its yield is 19-21%.
The corn straw that the present invention also can adopt other area to produce.
Claims (9)
1. a corn straw prepares pectin technology; With the corn straw is raw material; Process pectin through raw material processing, water extraction, deposition, washing, drying, pulverizing, it is characterized in that with the corn straw being raw material, in water, extract filter 23 to 5 repeatedly; Through pure method or salt method precipitated pectin, pure method precipitates promptly: extracting solution is added alcohols precipitation agent deposition and removes impurity with the alcohols washing composition behind vacuum concentration; The salt method precipitates promptly: extracting solution is directly added salts solution, after regulating the pH value precipitated pectin with alkali, remove metals ion with acidifying ethanol, use the alcohols detergent washing again; The pectin crushed after being dried that washing is obtained prepares finished product.
2. corn straw according to claim 1 prepares pectin technology, it is characterized in that: corn straw comprises its stem, leaf, fringe, root.
3. corn straw according to claim 1 prepares pectin technology; Processing condition when it is characterized in that water extraction are: solid-liquid (g/mL) ratio in corn straw and water is 1: 10-30 adds entry; Temperature 30-95 ℃, extract 3 to 5 times under the time 5-60 minute condition.
4. corn straw according to claim 1 prepares pectin technology, it is characterized in that: pure method deposition adopts methyl alcohol, ethanol or Virahol.
5. corn straw according to claim 1 prepares pectin technology, it is characterized in that: it is precipitation agent that salt method deposition adopts inorganic salt solution, regulates pH value to the 3-5 precipitated pectin through alkali.
6. corn straw according to claim 1 prepares pectin technology, it is characterized in that: the pectin that pure method deposition obtains directly adopts methyl alcohol, ethanol, Virahol to wash.
7. corn straw according to claim 1 prepares pectin technology, it is characterized in that: the pectin that salt method deposition obtains is removed metals ion with the acidifying washing with alcohol earlier, again with washing with methyl alcohol, ethanol, Virahol.
8. prepare pectin technology according to claim 1 or 7 described corn straws, it is characterized in that: acidifying ethanol is pressed 6: 1 to 4: 1 mixed getting with 80% to 100% ethanol and hydrochloric acid.
9. corn straw according to claim 1 prepares pectin technology, it is characterized in that: drying temperature is lower than 60 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102494506A CN102372791A (en) | 2010-08-10 | 2010-08-10 | Preparation process of pectin with maize straw |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102494506A CN102372791A (en) | 2010-08-10 | 2010-08-10 | Preparation process of pectin with maize straw |
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| CN102372791A true CN102372791A (en) | 2012-03-14 |
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| CN2010102494506A Pending CN102372791A (en) | 2010-08-10 | 2010-08-10 | Preparation process of pectin with maize straw |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796768A (en) * | 2012-07-30 | 2012-11-28 | 张爱诚 | High value integration utilization method of maize straw |
| CN103044568A (en) * | 2013-01-11 | 2013-04-17 | 河北工业大学 | Plant heteropolysaccharide sulfonate, as well as preparation method and application thereof |
| CN103739741A (en) * | 2013-12-22 | 2014-04-23 | 山东农业大学 | Method for extracting pectin from fermented hawthorn wine pomace |
| CN108276504A (en) * | 2018-01-24 | 2018-07-13 | 砀山海升果胶有限责任公司 | A kind of technique for extracting high purity pectin from apple pomace |
| CN110272507A (en) * | 2019-07-26 | 2019-09-24 | 福州大学 | A method of extracting high viscosity pectin from leaf category biomass |
-
2010
- 2010-08-10 CN CN2010102494506A patent/CN102372791A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796768A (en) * | 2012-07-30 | 2012-11-28 | 张爱诚 | High value integration utilization method of maize straw |
| CN103044568A (en) * | 2013-01-11 | 2013-04-17 | 河北工业大学 | Plant heteropolysaccharide sulfonate, as well as preparation method and application thereof |
| CN103739741A (en) * | 2013-12-22 | 2014-04-23 | 山东农业大学 | Method for extracting pectin from fermented hawthorn wine pomace |
| CN103739741B (en) * | 2013-12-22 | 2015-11-04 | 山东农业大学 | A kind of method extracting pectin from fermentation haw thorn wine pomace |
| CN108276504A (en) * | 2018-01-24 | 2018-07-13 | 砀山海升果胶有限责任公司 | A kind of technique for extracting high purity pectin from apple pomace |
| CN110272507A (en) * | 2019-07-26 | 2019-09-24 | 福州大学 | A method of extracting high viscosity pectin from leaf category biomass |
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Application publication date: 20120314 |