CN1766120A - Low acyl transparent gellangum production method - Google Patents
Low acyl transparent gellangum production method Download PDFInfo
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- CN1766120A CN1766120A CN 200410067555 CN200410067555A CN1766120A CN 1766120 A CN1766120 A CN 1766120A CN 200410067555 CN200410067555 CN 200410067555 CN 200410067555 A CN200410067555 A CN 200410067555A CN 1766120 A CN1766120 A CN 1766120A
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Abstract
The invention discloses a low acyl transparent gellangum production method, wherein a spray-drying process is employed to carrying out drying to the glue solution undergone alkaline treatment and filtration, so as to obtain the powder product.
Description
Technical field
The present invention relates to from the microbiological polysaccharide Gellan gum fermented liquid, extract the method for low acyl transparent gellangum.
Background technology
Common commodity gelling gum is to slough low-acyl gellan gum (or claiming deacylated gellan gum) behind most of ethanoyl by the method for alkaline purification under the high temperature on the market.If impurity such as the thalline that after alkaline purification fermented liquid is brought, pigment are removed, can obtain low acyl transparent gellangum.
Chinese patent ZL00125858.3 (Granted publication CN 1117159C; August 6 2003 day for announcing) a kind of technical scheme that obtains low acyl transparent gellangum from fermented liquid is disclosed; be characterized in removing large quantity of moisture in the glue, obtain half-dried film with the gel dewatering process.But from the angle evaluation of production operation and product application, this technology has following deficiency:
1, this scheme is used for actual production, and operation steps is more loaded down with trivial details, and labour intensity is big, and the serialization degree is low, and production control is difficult for.
When 2, the gelation of glue is handled,, introduced new impurity owing to use the calcium chloride gelating agent.
Summary of the invention
The purpose of this invention is to provide a kind of method of having simplified of from gellan gum fermentation liquid, extracting low acyl transparent gellangum, adopt this method can improve yield, obtain the easy aquation of product.
The extracting method of the low-acyl gellan gum that provided of invention, it comprises the steps such as alkaline purification, coarse filtration, micro-filtration of gellan gum fermentation liquid, then gelling gum filtrate is carried out the press spray drying, directly obtains powdery product.
Described filtration can be adopted the first filter press technology of ceramic membrane micro-filtration again.
In preferred embodiment, between filtration and the spraying drying step, also has evaporation-concentration step.
In another preferred embodiment, between filtration and the spraying drying step, also has the ultrafiltration and concentration step.
Behind the described enrichment step, the content of gelling gum is 1-5g/100ml in the concentrated solution.
More desirably, the content of gelling gum is 2-3g/100ml behind the enrichment step.
Embodiment
Fermented liquid that is obtained according to document ZL00125858.3 (Granted publication CN 1117159C, August 6 2003 day for announcing) or the gellan gum fermentation liquid that obtains with other ordinary method all can be used for implementing the present invention.
The extracting method of low-acyl gellan gum provided by the invention, it comprises the steps:
(1) alkaline purification of gellan gum fermentation liquid;
(2) liquid after the alkaline purification is filtered, comprise coarse filtration and micro-filtration;
(3) micro-filtration is obtained the gelling gum clear liquid and carry out the press spray drying, directly obtain powdery product.
The alkaline purification of fermented liquid can be undertaken by ordinary method described in the prior.Usually, the alkaline purification condition is as follows: temperature is 80-100 ℃, and pH is 9-12, handles and after 10-45 minute pH is transferred to neutrality.
Conventional coarse filtration as: methods such as adding pressure type or the filtration of vacuum type filter cloth, centrifuging all can be implemented the present invention.After conventional coarse filtration, carry out micro-filtration, can go out albumen in the fermented liquid more up hill and dale.
In preferred implementation of the present invention, carry out the technology of micro-filtration behind the employing filter press again.Add an amount of gac during filter press and can remove more polychrom as discoloring agent, dosage is the 0.1-0.5g/100ml fermented liquid.Micro-filtration uses the cross-current type ceramic membrane filter.
Spraying drying is that solution is sprayed into tiny vaporific drop, contacts with hot blast with huge specific surface area with the friction of high speed air intake, makes the moisture rapid evaporation, and a step obtains the solid fines end of solute, and whole evaporation process is generally finished in tens seconds.This technology is used for the extraction of gelling gum, and can save dehydration commonly used, granulation, drying, pulverizing etc. must be through step, and especially dried gelling gum solid has very strong toughness after the dehydration, to industrialized granulation, pulverize and bring difficulty.
Described spraying drying can be divided into centrifugal spraying drying and press spray drying according to the difference of spray pattern after the solution feed.Centrifugal spraying can make drop obtain the longer residence time, and the press spray method can be handled the solution system of viscosity higher.The drying of two kinds of all applicable gelling gum solution of method.In an embodiment of the present invention, adopt the press spray desiccating method, this is to consider that glue has big viscosity, and applying pressure formula shower nozzle is difficult for taking place the material latch up phenomenon.Inlet temperature to be to reach higher drying efficiency when dry, do not cause the overheated and color depth of product for well simultaneously, can adopt 80-150 ℃, 100-120 ℃ better.
Between filtration and the spraying drying step, can add enrichment step.Thick glue content is generally 1.0-1.5g/100ml in the gellan gum fermentation liquid, and the actual content of gelling gum is 0.5-0.8% behind the rejecting thalline, reduces spray-dired evaporated water by concentrating, and this is favourable to the energy expenditure that reduces whole leaching process.
Can concentrate with the method for heating evaporation in one embodiment, normal pressure or vacuum-evaporation all can be adopted, and solution temperature should remain on more than 40 ℃ during evaporation, to prevent solution gel in concentration process, but also should not be higher than 90 ℃, be destroyed easily because gelling gum is in the high temperature molecule for a long time.
In another preferred embodiment, concentrate and to carry out with the mode of ultrafiltration.Use ceramic super-filtering film, in 40-80 ℃ temperature range, carry out the cross-flow ultrafiltration.Big water gaging, part salt and pigment are by filter membrane, and gelling gum is trapped owing to having higher molecular weight, thus the inspissated of playing.
Behind the described enrichment step, the content of gelling gum is 1-5g/100ml in the concentrated solution, is 2-3g/100ml (measuring with the conventional pure precipitator method) better.
Advantage of the present invention is that processing step is simple, realizes continuous operation easily with conventional chemical unit equipment; Step reduces the back yield and also increases.The product that obtains dissolves in water easily for loose fine powder has good dispersiveness.
Embodiment 1
(1) ferments the gellan gum fermentation liquid that to obtain thick glue content be 1.2g/100ml according to document ZL00125858.3 (Granted publication CN 1117159C, August 6 2003 day for announcing) disclosed method.
(2) the 100L fermented liquid is heated to 90 ℃, transfers pH to 10 with NaOH solution, is incubated 85 ℃-90 ℃, adds dilute hydrochloric acid after 15 minutes and transfers about pH to 7.0.Continue to keep 85 ℃-90 ℃ fluid temperature, adding the 1Kg fineness is that 80-100 purpose diatomite stirs evenly.Filter with small-sized plate-and-frame filter press while hot through the diatomite precoating.The filtrate that obtains is cooled to 50 ℃, is 0.1 micron cross-flow ceramic membrane filter with the aperture, washes with a small amount of clear water top, obtains the bright about 120L of gelling gum filtrate.
(3) with the scraper-type evaporation equipment above-mentioned micro-filtrate is concentrated, 50 ℃ of feeding temperatures, about vacuum tightness 200mmHg, control vaporizer Heating temperature makes the concentrated solution temperature at 60-70 ℃.Obtain about 30L concentrated solution, gelling gum content is 2.3g/100ml after measured in the solution.
(4) concentrated solution enters YPG-150 type pressure spray dryer not receive the pump continuous feeding, and inlet temperature 110-120 ℃, about control input speed 1L/min.The product that obtains is a fine-powder, and water content is about 8%.
Embodiment 2
(1), (2) step undertaken by the method for embodiment 1, just adding the diatomaceous Powdered Activated Carbon that adds 0.3Kg simultaneously.
(3) be that 100,000 daltonian small-sized ceramic super-filtering film equipment concentrate above-mentioned micro-filtrate with molecular weight cut-off, 50-60 ℃ of filtration temperature control.By the time gelling gum content reaches 2.0g/100ml in the concentrated solution, stops to filter, and collects the about 35L of concentrated solution.
(4) concentrated solution enters YPG-150 type pressure spray dryer not receive the pump continuous feeding, and inlet temperature 110-120 ℃, about control input speed 1L/min.The product water content that obtains is about 8%.
Reference examples
(1), (2) step undertaken by the method for embodiment 1, just adding the diatomaceous Powdered Activated Carbon that adds 0.3Kg simultaneously.
(3) slowly adding 2L concentration under continuous the stirring in hot filtrate is the calcium chloride solution of 5g/100ml, and glue is cooled to room temperature formation gel; Gel piece is smashed in the bag that the filter cloth of packing into makes, and tying places the 10Mpa hydropress under and squeezed 2 hours.
(4) half-dried film is shredded, 60 ℃ of forced air dryings 6 hours are pulverized and are finished product, water content about 10%.
The result of embodiment and reference examples relatively sees the following form:
| Embodiment 1 | Embodiment 2 | Reference examples | ||
| Product weight | g | 625 | 635 | 610 |
| Ash | ％ | 12 | 10 | 12 |
| Moisture | ％ | 8 | 8 | 10 |
| Solvent temperature in the water | ℃ | 70-75 | 70-75 | More than 85 |
| 0.5% aqueous solution | Outward appearance | Transparent | Transparent | Transparent |
| 0.5% gel-strength | g/cm | 970 | 960 | 975 |
Claims (7)
1. the production method of a low acyl transparent gellangum, it comprises the step such as alkaline purification, coarse filtration, micro-filtration of gellan gum fermentation liquid, it is characterized in that gelling gum filtrate is carried out the press spray drying, obtains powdery product.
2. the method described in claim 1, press spray exsiccant inlet temperature is: 80-150 ℃.
3. the method described in claim 1, filtration step adopts the first filter press technology of ceramic membrane micro-filtration again.
4. the method described in claim 1 between filtration and the spraying drying step, also has evaporation-concentration step.
5. the method described in claim 1 between filtration and the spraying drying step, also has the ultrafiltration and concentration step.
6. the method described in claim 4 or 5, the content of gelling gum is 1-5g/100ml in the filtrate after concentrating.
7. the method described in claim 4 or 5, the content of gelling gum is 2-3g/100ml in the filtrate after concentrating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067555 CN1766120A (en) | 2004-10-28 | 2004-10-28 | Low acyl transparent gellangum production method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200410067555 CN1766120A (en) | 2004-10-28 | 2004-10-28 | Low acyl transparent gellangum production method |
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| CN1766120A true CN1766120A (en) | 2006-05-03 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008141507A1 (en) * | 2007-05-18 | 2008-11-27 | Shanghai Huiyuan Vegetal Capsule Co., Ltd | Organic solvent-free gellan gum and its preparing method thereof |
| CN102627699A (en) * | 2012-03-30 | 2012-08-08 | 杭州健恒生物技术有限公司 | Extraction method for high acyl gellan gum |
| CN103113488A (en) * | 2013-02-22 | 2013-05-22 | 天茁（上海）生物科技有限公司 | Method for extracting low-acyl transparent gellan gum easy to disperse and dissolve |
| CN104862354A (en) * | 2014-02-24 | 2015-08-26 | 杨凤英 | Production method of low-acyl gellan gum used for oil and gas exploitation |
| EP3385390A1 (en) | 2017-04-07 | 2018-10-10 | DSM IP Assets B.V. | A method for preparing high transparent low acyl gellan gum |
-
2004
- 2004-10-28 CN CN 200410067555 patent/CN1766120A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008141507A1 (en) * | 2007-05-18 | 2008-11-27 | Shanghai Huiyuan Vegetal Capsule Co., Ltd | Organic solvent-free gellan gum and its preparing method thereof |
| CN102627699A (en) * | 2012-03-30 | 2012-08-08 | 杭州健恒生物技术有限公司 | Extraction method for high acyl gellan gum |
| CN103113488A (en) * | 2013-02-22 | 2013-05-22 | 天茁（上海）生物科技有限公司 | Method for extracting low-acyl transparent gellan gum easy to disperse and dissolve |
| CN103113488B (en) * | 2013-02-22 | 2015-12-23 | 天茁（上海）生物科技有限公司 | The extracting method of the low acyl transparent type gelling gum of a kind of easy dispersion and dissolving |
| CN104862354A (en) * | 2014-02-24 | 2015-08-26 | 杨凤英 | Production method of low-acyl gellan gum used for oil and gas exploitation |
| EP3385390A1 (en) | 2017-04-07 | 2018-10-10 | DSM IP Assets B.V. | A method for preparing high transparent low acyl gellan gum |
| US10556970B2 (en) | 2017-04-07 | 2020-02-11 | Dsm Ip Assets B.V. | Method for preparing high transparent low acyl gellan gum |
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Addressee: Yin Hongbo Document name: Notice of publication of application for patent for invention |
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