CN106632734A - Processing technology for extracting agar from Gelidium amansii - Google Patents
Processing technology for extracting agar from Gelidium amansii Download PDFInfo
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- CN106632734A CN106632734A CN201510742683.2A CN201510742683A CN106632734A CN 106632734 A CN106632734 A CN 106632734A CN 201510742683 A CN201510742683 A CN 201510742683A CN 106632734 A CN106632734 A CN 106632734A
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- agar
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- filter residue
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Abstract
The invention relates to a processing technology for extracting agar, and in particular to a processing technology for extracting agar from Gelidium amansii. The processing technology for extracting the agar from the Gelidium amansii comprises the following steps: using the Gelidium amansii as a raw material, carrying out the alkali treatment to the pre-treated Gelidium amansii, and washing; and treating the Gelidium amansii washed to be neutral, and then carrying out the first agar extraction, the second agar extraction and the recovery treatment, and finally fine-filtering to obtain a product. The process is green and environmental, and is capable of improving the extraction efficiency and jelly strength of the agar.
Description
Technical field
The invention is related to the processing technology that a kind of agar-agar is extracted, and specifically, is related to one kind from stone
The processing technology of agar-agar is extracted in cauliflower.
Background technology
Agar-agar, also known as agar, agar, delicacy made from bird's nests essence, agel-agal, cold day.Agar answering in food industry
There is a kind of exceedingly useful peculiar property with.Its feature：With coagulability, stability, can be with
Some materials form the physicochemical properties such as complex compound.With toxin-expelling and face nourishing, it is hypotensive, hypoglycemic,
Enhance immunity etc. is acted on, and is had a wide range of applications in terms of food, medicine, agricultural and scientific research.It is long
Since phase, the market of agar-agar is well sold and in short supply, and in recent years price is also rising steadily.At present, most domestic
Enterprise production agar-agar technique typically all include alkali process, soda, bleaching, wash acid, wash bleaching,
Several steps such as extraction, refined filtration, the step of existing preparation technology in, often there is problems with：(1)
During alkali process, treatment temperature is higher, causes part agar-agar to be lost by alkaline hydrolysis；(2) alkali process,
Soda, wash acid, wash bleaching these steps in used substantial amounts of alkali lye, acid solution, bleaching liquid, hold
Substantial amounts of waste water is also easy to produce, greatly harm is caused to environment；(3) the secondary chlorine that blanching step is adopted
Sour sodium can to a certain extent aoxidize agar-agar molecule, make the gel strength of agar-agar and reduce；(4) bleaching effect
It is really not good enough, agar-agar product easy brightness reversion in storage process is caused, cause product not attractive in appearance enough.
The content of the invention
The invention provides a kind of processing technology that agar-agar is extracted from agar, the technique environmental protection,
Improve the recovery rate and agar-agar gel strength of agar-agar.
Technical scheme：The processing technology of agar-agar is extracted from agar, it is characterised in that：
Agar is adopted for raw material, procedure of processing is as follows：
(1) pretreated agar is placed in 3～10wt%KOH solution of 25～40 times of its weight
Middle process, is heated to 60～95 DEG C, maintains 2 hours of constant temperature；By the good agar of alkali process with light
It is washed to pH and reaches 6.5～7；
(2) agar for being washed till neutrality is hung in into process tank, adds 8～16 times of water and open stirring
Device；First time bleaching, step are carried out with 0.1%KCl solution and the bleaching liquid of 0.5%HCl solution compositions
For：The 0.1%KCl solution of 10 times of agar weight is initially charged, is stirred, add 0.5%HCl
Solution to pH is 4～6, is stirred 20 minutes；The sulfamate of addition bleaching liquid weight 0.05% delays
Electuary, stirs 15 minutes, venting bleaching liquid, washing；With 10 times of 0.01% Gao Meng of agar weight
Sour potassium carries out second bleaching, and the time is 15 minutes；By the agar fresh water after acid, bleaching
Washing is carried out until pH reaches 6.5～7；
(3) glue is carried：A. glue is once carried：With 8～12 times of water yields of agar dry weight, 0.03MPa's
Boiling water carries glue under pressure condition, and the time is 1～2 hour, is filtered, and filtrate flows into coarse filtration flow container, filter residue
Into in second extraction water；B. glue is carried two times：Filter residue carries again glue, plus 2～3 times of water of frond dry weight
Amount, boiling water carries glue 1 hour under condition of normal pressure, filters, and filtrate flows into coarse filtration flow container, and filter residue is reclaimed；
C. 5 times of water yields that filter residue adds frond dry weight are reclaimed two times, is boiled under normal pressure 1 hour, filtered, filter
Liquid is used as to extract water, and filter residue is used for the production of seaweed biological long-acting fertilizer.
(4) refined filtration：By coarse filtration liquid first with 100 mesh sieve net filtrations, then with refined filtration tank suction filtration, until hot
Water-insoluble is less than 0.3%；The good glue of refined filtration is entered into refined filtration liquid storage tank, disk condensation is filled and is obtained product.
Preferably, product is dehydrated and dried process after solidification, and step is as follows：
A. the gel of freezing is loaded in squeezing cloth bag, pressurizing and dehydrating, until film water content is less than 80%；
B. the film after dehydration is placed in baking oven, temperature is 30～80 DEG C, is dried containing up to film
The water yield≤20%.
Preferably, charging accounts for the 1/3 of bag in the squeezing cloth bag, and the pressurizing and dehydrating is divided into two ranks
Section：When water content >=85%, pressure≤12MPa；Work as water content<When 85%, 12MPa<Pressure
≤25MPa。
Preferably, dehydration and the product after dried process are crushed as requested, are sieved, be loaded on
In the moistureproof paper web of sealing.
The beneficial effects of the present invention is, compared with current agar-agar extraction process, there is following three aspect
Improvement：
(1) the first pass washing lotion in soda operation can be reused directly for the configuration of alkali lye；Soda, wash acid,
The waste liquid of bleaching is washed through recycling, for producing daily cleaning；Filter residue can be used for seaweed bio
The production of depot fertilizer；Therefore, in whole agar-agar production process, produce without waste water and solid waste,
Realize the clean manufacturing during agar-agar is extracted.
(2) add sulfamate in first time bleaches, reduce sodium hypochlorite to agar-agar molecule
Oxidation, makes the 400g/cm of the gel strength of agar-agar from traditional handicraft2Left and right brings up to 500g/cm2More than.
(3) secondary bleaching is carried out using potassium permanganate, thoroughly removes the rhodophyll in frond, make product
It is pure white, brightness reversion is difficult in storage process.
Specific embodiment
Embodiment 1
(1) pretreated agar is placed in the 6%KOH solution of 26 times of its weight and is processed, be heated to
60 DEG C, maintain 2 hours of constant temperature；The good agar fresh water of alkali process is washed till into pH and reaches 6.5～7, received
Collection alkali lye, recycles；
(2) agar for being washed till neutrality is hung in into process tank, adds 10 times of water and turn on agitator；With 0.1%
KCl solution and the bleaching liquid of 0.5%HCl solution compositions carry out first time bleaching, and step is：It is initially charged parmelia saxatilis
The 0.1%KCl solution of 10 times of dish weight, stirs, and it is 5 to add 0.5%HCl solution to pH,
Stirring 20 minutes；The sulfamic acid salt buffer agent of addition bleaching liquid weight 0.05%, stirs 15 minutes, venting
Bleaching liquid, washing；C. second bleaching, time are carried out with 0.01% potassium permanganate of 10 times of agar weight
For 15 minutes；Agar after acid, bleaching is carried out into washing with fresh water until pH reaches 6.5～7；
(3) glue is carried：A. glue is once carried：With 8 times of water yields of agar dry weight, the pressure condition of 0.03MPa
Lower boiling water carries glue, and the time is 1 hour, is filtered, and filtrate flows into coarse filtration flow container, and filter residue enters second extraction water
In；B. glue is carried two times：Filter residue puies forward again glue, plus 2 times of water yields of frond dry weight, and boiling water is carried under condition of normal pressure
Glue 1 hour, filters, and filtrate flows into coarse filtration flow container, and filter residue is reclaimed；C. reclaiming filter residue for two times adds frond to do
5 times of water yields of weight, boil 1 hour under normal pressure, filter, and filtrate is used as to extract water, and filter residue is for marine alga life
The production of thing depot fertilizer.
(4) refined filtration：By coarse filtration liquid first with 100 mesh sieve net filtrations, then with refined filtration tank suction filtration, until hot water is not
Molten thing is less than 0.3%；The good glue of refined filtration is entered into refined filtration liquid storage tank, disk condensation is filled and is obtained product.
(5) it is dehydrated and is dried：A. it is described to squeeze charging in cloth bag by the gel of freezing loaded on squeezing in cloth bag
Account for the 1/3 of bag, pressurizing and dehydrating, when water content >=85%, pressure is 12MPa；Work as water content<When 85%,
Pressure is 25MPa, until film water content is less than 80%；B. the film after dehydration is placed in baking oven, temperature
Spend for 30 DEG C, be dried water content≤20% until film.
(6) crush, sieve and pack：Dehydration and the product after dried process are crushed as requested,
Sieve, in the moistureproof paper web loaded on sealing.
Embodiment 2
(1) pretreated agar is placed in the 3%KOH solution of 40 times of frond weight and is processed, heating
To 75 DEG C, 2 hours of constant temperature are maintained；The good agar fresh water of alkali process is washed till into pH and reaches 6.5～7,
Alkali lye is collected, is recycled；
(2) agar for being washed till neutrality is hung in into process tank, adds 15 times of water and turn on agitator；With 0.1%
KCl solution and the bleaching liquid of 0.5%HCl solution compositions carry out first time bleaching, and step is：It is initially charged parmelia saxatilis
The 0.1%KCl solution of 10 times of dish weight, stirs, and it is 6 to add 0.5%HCl solution to pH,
Stirring 20 minutes；The sulfamic acid salt buffer agent of addition bleaching liquid weight 0.05%, stirs 15 minutes, venting
Bleaching liquid, washing；Second bleaching is carried out with 10 times of 0.01% potassium permanganate of agar weight, the time is
15 minutes；Agar after acid, bleaching is carried out into washing with fresh water until pH reaches 6.5～7；
(3) glue is carried：A. glue is once carried：With 12 times of water yields of agar dry weight, the pressure condition of 0.03MPa
Lower boiling water carries glue, and the time is 2 hours, is filtered, and filtrate flows into coarse filtration flow container, and filter residue enters second extraction water
In；B. glue is carried two times：Filter residue puies forward again glue, plus 3 times of water yields of frond dry weight, and boiling water is carried under condition of normal pressure
Glue 1 hour, filters, and filtrate flows into coarse filtration flow container, and filter residue is reclaimed；C. reclaiming filter residue for two times adds frond to do
5 times of water yields of weight, boil 1 hour under normal pressure, filter, and filtrate is used as to extract water, and filter residue is for marine alga life
The production of thing depot fertilizer.
(4) refined filtration：By coarse filtration liquid first with 100 mesh sieve net filtrations, then with refined filtration tank suction filtration, until hot water is not
Molten thing is less than 0.3%；The good glue of refined filtration is entered into refined filtration liquid storage tank, disk condensation is filled and is obtained product.
(5) it is dehydrated and is dried：A. it is described to squeeze charging in cloth bag by the gel of freezing loaded on squeezing in cloth bag
Account for the 1/3 of bag, pressurizing and dehydrating, when water content >=85%, pressure is 9MPa；Work as water content<When 85%,
Pressure is 19MPa, until film water content is less than 80%；B. the film after dehydration is placed in baking oven, temperature
Spend for 80 DEG C, be dried water content≤20% until film.
(6) crush, sieve and pack：Dehydration and the product after dried process are crushed as requested,
Sieve, in the moistureproof paper web loaded on sealing.
Embodiment 3
(1) pretreated agar is placed in the 8%KOH solution of 20 times of frond weight and is processed,
95 DEG C are heated to, 2 hours of constant temperature are maintained；The good agar fresh water of alkali process is washed till into pH to reach
To 6.5～7, alkali lye is collected, recycled；
(2) agar for being washed till neutrality is hung in into process tank, adds 15 times of water and turn on agitator；
First time bleaching is carried out with 0.1%KCl solution and the bleaching liquid of 0.5%HCl solution compositions, step is：
The 0.1%KCl solution of 10 times of agar weight is initially charged, is stirred, add 0.5%HCl molten
Liquid to pH is 4, is stirred 20 minutes；The sulfamic acid salt buffer agent of addition bleaching liquid weight 0.05%,
Stirring 15 minutes, venting bleaching liquid, washing；Entered with 10 times of 0.01% potassium permanganate of agar weight
Row is bleached for second, and the time is 15 minutes；Agar fresh water after acid, bleaching is entered into water-filling
Wash until pH reaches 6.5～7；
(3) glue is carried：A. glue is once carried：With 10 times of water yields of agar dry weight, the pressure of 0.03MPa
Under the conditions of boiling water carry glue, the time is 1.5 hours, is filtered, and filtrate flows into coarse filtration flow container, and filter residue enters two
In secondary extraction water；B. glue is carried two times：Filter residue puies forward again glue, plus 2.5 times of water yields of frond dry weight, often
Boiling water carries glue 1 hour under the conditions of pressure, filters, and filtrate flows into coarse filtration flow container, and filter residue is reclaimed；C. two times
5 times of water yields that filter residue adds frond dry weight are reclaimed, is boiled under normal pressure 1 hour, filtered, filtrate is used as
Water is extracted, filter residue is used for the production of seaweed biological long-acting fertilizer.
(4) refined filtration：By coarse filtration liquid first with 100 mesh sieve net filtrations, then with refined filtration tank suction filtration, until hot
Water-insoluble is less than 0.3%；The good glue of refined filtration is entered into refined filtration liquid storage tank, disk condensation is filled and is obtained product.
(5) it is dehydrated and is dried：A. it is described to squeeze in cloth bag by the gel of freezing loaded on squeezing in cloth bag
Charging accounts for the 1/3 of bag, pressurizing and dehydrating, and when water content >=85%, pressure is 6MPa；Work as water content
<When 85%, pressure is 15MPa, until film water content is less than 80%；B. by the film after dehydration
In being placed in baking oven, temperature is 45 DEG C, is dried water content≤20% until film.
(6) crush, sieve and pack：Dehydration and the product after dried process are carried out into as requested powder
It is broken, sieve, loaded on sealing moistureproof paper web in.
Claims (3)
1. it is a kind of from agar extract agar-agar processing technology, it is characterised in that：Adopt agar for
Raw material, procedure of processing is as follows：
(1) pretreated agar is placed in 3～10wt%KOH solution of 25～40 times of its weight
Middle process, is heated to 60～95 DEG C, maintains 2 hours of constant temperature；By the good agar of alkali process with light
It is washed to pH and reaches 6.5～7；
(2) agar for being washed till neutrality is hung in into process tank, adds 8～16 times of water and open stirring
Device；First time bleaching, step are carried out with 0.1%KCl solution and the bleaching liquid of 0.5%HCl solution compositions
For：The 0.1%KCl solution of 10 times of agar weight is initially charged, is stirred, add 0.5%HCl
Solution to pH is 4～6, is stirred 20 minutes；The sulfamate of addition bleaching liquid weight 0.05% delays
Electuary, stirs 15 minutes, venting bleaching liquid, washing；With 10 times of 0.01% Gao Meng of agar weight
Sour potassium carries out second bleaching, and the time is 15 minutes；By the agar fresh water after acid, bleaching
Washing is carried out until pH reaches 6.5～7；
(3) glue is carried：A. glue is once carried：With 8～12 times of water yields of agar dry weight, 0.03MPa's
Boiling water carries glue under pressure condition, and the time is 1～2 hour, is filtered, and filtrate flows into coarse filtration flow container, filter residue
Into in second extraction water；B. glue is carried two times：Filter residue carries again glue, plus 2～3 times of water of frond dry weight
Amount, boiling water carries glue 1 hour under condition of normal pressure, filters, and filtrate flows into coarse filtration flow container, and filter residue is reclaimed；
C. 5 times of water yields that filter residue adds frond dry weight are reclaimed two times, is boiled under normal pressure 1 hour, filtered, filter
Liquid is used as to extract water, and filter residue is used for the production of seaweed biological long-acting fertilizer.
(4) refined filtration：By coarse filtration liquid first with 100 mesh sieve net filtrations, then with refined filtration tank suction filtration, until hot
Water-insoluble is less than 0.3%；The good glue of refined filtration is entered into refined filtration liquid storage tank, disk condensation is filled and is obtained product.
2. the processing technology that agar-agar is extracted from agar according to claim 1, its feature exists
In：Product is dehydrated and dried process after solidification, and step is as follows：
A. the gel of freezing is loaded in squeezing cloth bag, pressurizing and dehydrating, until film water content is less than 80%；
B. the film after dehydration is placed in baking oven, temperature is 30～80 DEG C, is dried containing up to film
The water yield≤20%.
3. the processing technology that agar-agar is extracted from agar according to claim 2, its feature exists
In：Charging in the squeezing cloth bag accounts for the 1/3 of bag, and the pressurizing and dehydrating is divided into two stages：When aqueous
During amount >=85%, pressure≤12MPa；Work as water content<When 85%, 12MPa<Pressure≤25MPa.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510742683.2A CN106632734A (en) | 2015-11-04 | 2015-11-04 | Processing technology for extracting agar from Gelidium amansii |
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| CN201510742683.2A CN106632734A (en) | 2015-11-04 | 2015-11-04 | Processing technology for extracting agar from Gelidium amansii |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112159827A (en) * | 2020-10-16 | 2021-01-01 | 福建环海生物科技股份有限公司 | Production process of agar oligosaccharide |
| CN114040929A (en) * | 2019-06-04 | 2022-02-11 | 达因比奥有限公司 | Preparation method and application of agar for new agaro-oligosaccharide mixture raw material |
| CN117343215A (en) * | 2023-12-06 | 2024-01-05 | 中国海洋大学 | Method for extracting agar from agar |
-
2015
- 2015-11-04 CN CN201510742683.2A patent/CN106632734A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114040929A (en) * | 2019-06-04 | 2022-02-11 | 达因比奥有限公司 | Preparation method and application of agar for new agaro-oligosaccharide mixture raw material |
| CN112159827A (en) * | 2020-10-16 | 2021-01-01 | 福建环海生物科技股份有限公司 | Production process of agar oligosaccharide |
| CN112159827B (en) * | 2020-10-16 | 2022-03-08 | 福建环海生物科技股份有限公司 | Production process of agar oligosaccharide |
| CN117343215A (en) * | 2023-12-06 | 2024-01-05 | 中国海洋大学 | Method for extracting agar from agar |
| CN117343215B (en) * | 2023-12-06 | 2024-02-09 | 中国海洋大学 | Method for extracting agar from agar |
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Application publication date: 20170510 |