CN105495249A - Preparation method of vacuum freeze-dried fresh Chinese wolfberry juice powder - Google Patents
Preparation method of vacuum freeze-dried fresh Chinese wolfberry juice powder Download PDFInfo
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- CN105495249A CN105495249A CN201410499073.XA CN201410499073A CN105495249A CN 105495249 A CN105495249 A CN 105495249A CN 201410499073 A CN201410499073 A CN 201410499073A CN 105495249 A CN105495249 A CN 105495249A
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Abstract
The invention discloses a preparation method of vacuum freeze-dried fresh Chinese wolfberry juice powder. The method employs vacuum freeze drying dewatering technology to process the fresh Chinese wolfberry juice squeezed from fresh Chinese wolfberry into freeze-dried Chinese wolfberry powder. The method consists of: firstly pre-freezing fresh Chinese wolfberry juice for a long time about 10-16h, then under a low work pressure (3-30Pa) and a low sublimation temperature (25-40DEG C), bringing the material into a frozen state, carrying out vacuum freeze drying to let ice crystals quickly sublimate into water vapour to overflow, and finally adopting a high desorption temperature (60-80DEG C) to shorten the desorption drying time. The method maximumly maintains the nutrients of fresh Chinese wolfberry juice, and has economical feasibility.
Description
Technical field
The invention belongs to matrimony vine processing technique field, be specifically related to the preparation method of the fresh powder of squeezing the juice of a kind of vacuum freezing-dried wolfberry.
Background technology
Squeeze the juice fresh for the matrimony vine obtained after new fresh fructus lycii fragmentation, increased popularity at home and abroad.But matrimony vine is fresh squeezes the juice and also there is transport and carry inconvenience, the problem that the holding time is short; Food Science man is when studying the formula of the health care of food product containing matrimony vine both at home and abroad simultaneously, and day by day in the urgent need to fully keeping the nutritional labeling of matrimony vine, and the wolfberry fruit powder that fully can be absorbed by human body is as formula components.
Patent CN102132879A discloses one " processing technology of vacuum freezing-dried wolfberry fruit powder ", adopts Vacuum Freezing & Drying Technology that medlar fresh fruit is carried out freeze-drying, at utmost remains the nutritional labeling in medlar fresh fruit, appearance luster.But because the medlar fresh fruit after plucking is unfavorable for preserving and long-distance transport, and only just there iing fresh fruit for plucking, the production and supply of the long-term stability of matrimony vine freeze-dried powder can be unfavorable for so the annual 7-10 month.Therefore the present invention is based on existing reality, selects to squeeze the juice as raw material the matrimony vine of Ningxia large-scale production and storage is fresh, carries out vacuum freeze drying, realizes the supply market that matrimony vine freeze-dried powder is stabilized the economy.
Vacuum Freezing & Drying Technology is frozen into solid-state at a lower temperature by wet stock or solution, then makes moisture wherein be directly sublimed into gaseous state without liquid state under vacuo, finally make the dry technology of material dewatering.Vacuum Freezing & Drying Technology, with common drying means as dried, drying, boil dry, spraying dry and vacuum drying compare, it is dry at low temperatures, oxygen is few, makes the nutritional labeling of the volatile ingredient in material and heated denaturalization and fragrance ingredient lose very little, simultaneously in low temperature drying process, the effect of microbial growth and enzyme almost cannot be carried out, the proterties that can material be kept best original, dry rear volume, shape are substantially constant, and rehydration is good.Vacuum Freezing & Drying Technology can remove the moisture of 95-99.5% in material, the long shelf-life of product.
Summary of the invention
The object of the present invention is to provide the preparation method of the fresh powder of squeezing the juice of a kind of vacuum freezing-dried wolfberry, it can keep the fresh nutritional labeling of squeezing the juice of matrimony vine to greatest extent, improves drying quality, and can solve the supply question of market that matrimony vine freeze-dried powder stabilizes the economy.
In order to achieve the above object, technical solution of the present invention is: the preparation method of the fresh powder of squeezing the juice of a kind of vacuum freezing-dried wolfberry, it comprises the steps:
(1) pre-freeze: fresh for matrimony vine sabot of squeezing the juice is paved, carries out slow freezing at refrigerating chamber;
(2) lyophilization: the dryness storehouse material that pre-freeze is good being put into vacuum freeze-drying machine, carries out cold distillation;
(3) parsing-desiccation is carried out to the material after step (2) lyophilization;
(4) crushing packing is carried out to the material after step (3) parsing-desiccation: the fresh freeze-dried powder of squeezing the juice of the matrimony vine after pulverizing carries out inflated with nitrogen packaging, is placed in keeping fresh at normal temperature.
The preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry of the present invention, matrimony vine in wherein said step (1) is fresh squeezes the juice is the Lycium chinense juice obtained after, sterilizing broken by medlar fresh fruit, also comprises the concentrated medlar juice of Lycium chinense juice by obtaining after concentrated.
The preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry of the present invention, the pre-freeze condition of wherein said step (1) is: sabot amount is 5 ~ 10kg/m
2, material thickness is 2 ~ 3cm, and pre-freezing temperature is-30 DEG C to-35 DEG C, and the pre-freeze time is 10-16h.
The preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry of the present invention, setting operating pressure in wherein said step (2) lyophilization process is 3-30Pa, lyophilization temperature is 25-40 DEG C, condenser temperature is ~ 40 to-60 DEG C, lyophilization time 8-12h.
The preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry of the present invention, in wherein said step (3) adsorption stripping and dry process, operating pressure is 20-30Pa, and adsorption stripping and dry temperature is 60-80 DEG C, and the adsorption stripping and dry time is 1-3h.
The preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry of the present invention, wherein said step is pulverized cryodesiccated product in (4), and room temperature is at 20-25 DEG C, and indoor relative humidity is lower than 70%.
The preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry of the present invention, aluminium foil bag selected by the packaging material in wherein said step (4).
After adopting such scheme, the present invention is by first carrying out long-time pre-freeze by fresh for matrimony vine squeezing the juice, then under low operating pressure, low sublimation temperature, material is made to be in frozen state, carry out vacuum freeze drying, its ice crystal can be sublimed into steam rapidly and overflow, and finally adopts higher desorption temperature, shortens the time of adsorption stripping and dry, the fresh nutritional labeling of squeezing the juice of maximum maintenance matrimony vine, and economically there is feasibility.
The invention has the advantages that:
1, the present invention is based on existing reality, selects to squeeze the juice as raw material the matrimony vine of Ningxia large-scale production and storage is fresh, carries out vacuum freeze drying, realizes the supply market that matrimony vine freeze-dried powder is stabilized the economy;
2, the present invention adopts and freezes technique slowly for a long time in the fresh refrigerating process of squeezing the juice of matrimony vine, time is 10-16h, make fresh the squeezing the juice of matrimony vine can form larger crystal ice granule in refrigerating process, can directly distil rapidly in the lyophilization stage becomes gaseous state, improves rate of drying;
3, when milling product, the present invention adopts air-conditioning, and room temperature is down to 20-25 DEG C, and indoor relative humidity, lower than 70%, effectively can be avoided sticking together when milling product even melt and dissolved, thus cause the phenomenon that freeze-drying again makes product color shade;
4, adopt inflated with nitrogen packaging, prevent the moisture absorption of product ingress of air and oxidation from degrading on the one hand, another reverse side is conducive to transportation and sale, Shelf-life.
Detailed description of the invention
Below in conjunction with specific embodiment, set forth the present invention further.But these embodiments are only limitted to illustrate that the present invention and being not used in limits the scope of the invention.
Embodiment 1
Preparation method's embodiment of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry of the present invention, its preparation process is:
(1) pre-freeze: by fresh for matrimony vine paving dish of squeezing the juice, sabot amount is 5kg/m
2, material thickness is 3cm, pushes in freezer and freezes slowly, and pre-freezing temperature is-30 DEG C, pre-freeze time 10h;
(2) lyophilization: material good for pre-freeze is pushed rapidly in freeze dryer, shut drying box door, start immediately to vacuumize, setting operating pressure in lyophilization process is 10Pa, lyophilization temperature is 35 DEG C, condenser temperature is-50 DEG C, lyophilization time 9h;
(3) adsorption stripping and dry: in adsorption stripping and dry process, operating pressure is 25Pa, adsorption stripping and dry temperature is 70 DEG C, the adsorption stripping and dry time is 2h;
(4) crushing packing: pulverize cryodesiccated product, room temperature is at 20 DEG C, and indoor relative humidity 60%, the fresh freeze-dried powder of squeezing the juice of the matrimony vine after pulverizing carries out inflated with nitrogen packaging, and packaging material are aluminium foil bag, are placed in keeping fresh at normal temperature.
The dehydration rate of product reaches 98%, and color and luster is scarlet, has matrimony vine distinctive smell, and the shelf-life reaches 1 year.
Embodiment 2
Preparation method's embodiment of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry of the present invention, its preparation process is:
(1) pre-freeze: by fresh for matrimony vine paving dish of squeezing the juice, sabot amount is 8kg/m
2, material thickness is 2.5cm, and push in freezer together with lyophilized plate and freeze slowly, pre-freezing temperature is-35 DEG C, pre-freeze time 13h;
(2) lyophilization: material good for pre-freeze is pushed rapidly in freeze dryer, shut drying box door, start immediately to vacuumize, setting operating pressure in lyophilization process is 30Pa, lyophilization temperature is 35 DEG C, condenser temperature is-50 DEG C, lyophilization time 10h;
(3) adsorption stripping and dry: in adsorption stripping and dry process, operating pressure is 20Pa, adsorption stripping and dry temperature is 75 DEG C, the adsorption stripping and dry time is 2.5h;
(4) crushing packing: pulverize cryodesiccated product, room temperature is at 22 DEG C, and indoor relative humidity 65%, the fresh freeze-dried powder of squeezing the juice of the matrimony vine after pulverizing carries out inflated with nitrogen packaging, and packaging material are aluminium foil bag, are placed in keeping fresh at normal temperature.
The dehydration rate of product reaches 98.5%, and color and luster is scarlet, has matrimony vine distinctive smell, and the shelf-life reaches 1 year.
Embodiment 3
Preparation method's embodiment of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry of the present invention, its preparation process is:
(1) pre-freeze: by fresh for matrimony vine paving dish of squeezing the juice, sabot amount is 9kg/m
2, material thickness is 2cm, and push in freezer together with lyophilized plate and freeze slowly, pre-freezing temperature is-35 DEG C, pre-freeze time 14h;
(2) lyophilization: material good for pre-freeze is pushed rapidly in freeze dryer, shut drying box door, start immediately to vacuumize, setting operating pressure in lyophilization process is 13Pa, lyophilization temperature is 35 DEG C, condenser temperature is-50 DEG C, lyophilization time 12h;
(3) adsorption stripping and dry: in adsorption stripping and dry process, operating pressure is 20Pa, adsorption stripping and dry temperature is 60 DEG C, the adsorption stripping and dry time is 1.5h;
(4) crushing packing: pulverize cryodesiccated product, room temperature is at 22 DEG C, and indoor relative humidity 65%, the fresh freeze-dried powder of squeezing the juice of the matrimony vine after pulverizing carries out inflated with nitrogen packaging, and packaging material are aluminium foil bag, are placed in keeping fresh at normal temperature.
The dehydration rate of product reaches 99%, and color and luster is scarlet, has matrimony vine distinctive smell, and the shelf-life reaches 1 year.
Embodiment 4
Preparation method's embodiment of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry of the present invention, its preparation process is:
(1) pre-freeze: by fresh for matrimony vine paving dish of squeezing the juice, sabot amount is 10kg/m
2, material thickness is 2cm, and push in freezer together with lyophilized plate and freeze slowly, pre-freezing temperature is-35 DEG C, pre-freeze time 14h;
(2) lyophilization: material good for pre-freeze is pushed rapidly in freeze dryer, shut drying box door, start immediately to vacuumize, setting operating pressure in lyophilization process is 30Pa, lyophilization temperature is 40 DEG C, condenser temperature is-50 DEG C, lyophilization time 10h;
(3) adsorption stripping and dry: in adsorption stripping and dry process, operating pressure is 25Pa, adsorption stripping and dry temperature is 60 DEG C, the adsorption stripping and dry time is 2h;
(4) crushing packing: pulverize cryodesiccated product, room temperature is at 22 DEG C, and indoor relative humidity 65%, the fresh freeze-dried powder of squeezing the juice of the matrimony vine after pulverizing carries out inflated with nitrogen packaging, and packaging material are aluminium foil bag, are placed in keeping fresh at normal temperature.
The dehydration rate of product reaches 98%, and color and luster is scarlet, has matrimony vine distinctive smell, and the shelf-life reaches 1 year.
The above embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various distortion that the common engineers and technicians in this area make technical scheme of the present invention and improvement, all should fall in protection domain that claims of the present invention determine.
Claims (7)
1. a preparation method for the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry, is characterized in that: comprise the steps:
(1) pre-freeze: fresh for matrimony vine sabot of squeezing the juice is paved, carries out slow freezing at refrigerating chamber;
(2) lyophilization: the dryness storehouse material that pre-freeze is good being put into vacuum freeze-drying machine, carries out cold distillation;
(3) parsing-desiccation is carried out to the material after step (2) lyophilization;
(4) crushing packing is carried out to the material after step (3) parsing-desiccation: the fresh freeze-dried powder of squeezing the juice of the matrimony vine after pulverizing carries out inflated with nitrogen packaging, is placed in keeping fresh at normal temperature.
2. the preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry according to claim 1, it is characterized in that: the matrimony vine in described step (1) is fresh squeezes the juice is the Lycium chinense juice obtained after, sterilizing broken by medlar fresh fruit, also comprising the concentrated medlar juice of Lycium chinense juice by obtaining after concentrated.
3. the preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry according to claim 1, is characterized in that: the pre-freeze condition of described step (1) is: sabot amount is 5 ~ 10kg/m
2, material thickness is 2 ~ 3cm, and pre-freezing temperature is-30 DEG C to-35 DEG C, and the pre-freeze time is 10-16h.
4. the preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry according to claim 1, it is characterized in that: setting operating pressure in described step (2) lyophilization process is 3-30Pa, lyophilization temperature is 25-40 DEG C, condenser temperature is-40 to-60 DEG C, lyophilization time 8-12h.
5. the preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry according to claim 1, it is characterized in that: in described step (3) adsorption stripping and dry process, operating pressure is 20-30Pa, adsorption stripping and dry temperature is 60-80 DEG C, and the adsorption stripping and dry time is 1-3h.
6. the preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry according to claim 1, is characterized in that: described step is pulverized cryodesiccated product in (4), and room temperature is at 20-25 DEG C, and indoor relative humidity is lower than 70%.
7. the preparation method of the fresh powder of squeezing the juice of vacuum freezing-dried wolfberry according to claim 1, is characterized in that: aluminium foil bag selected by the packaging material in described step (4).
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| CN201410499073.XA CN105495249A (en) | 2014-09-25 | 2014-09-25 | Preparation method of vacuum freeze-dried fresh Chinese wolfberry juice powder |
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| CN201410499073.XA CN105495249A (en) | 2014-09-25 | 2014-09-25 | Preparation method of vacuum freeze-dried fresh Chinese wolfberry juice powder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107581451A (en) * | 2016-07-06 | 2018-01-16 | 重庆百农网投资有限公司 | A kind of method of lyophilized lotus seeds |
| CN109170869A (en) * | 2018-11-06 | 2019-01-11 | 胡爱娣 | A kind of American ginseng medlar Ultramicro-powder microwave vacuum freeze drying means |
| CN111557442A (en) * | 2020-05-09 | 2020-08-21 | 邢玉娇 | Proanthocyanidins lycium ruthenicum freeze-dried powder and preparation method thereof |
| CN115769880A (en) * | 2022-12-20 | 2023-03-10 | 济南纯臻生态农业发展有限公司 | Preparation method of lyophilized royal jelly powder product |
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| CN1194113A (en) * | 1998-03-26 | 1998-09-30 | 宁夏杞星营养制品有限公司 | Vacuum freezing-dried wolfberry fruit powder and its processing technology |
| CN101579095A (en) * | 2009-06-22 | 2009-11-18 | 大连工业大学 | Technology for preparing medlar active freeze-dried powder and capsules |
| CN102715600A (en) * | 2011-09-20 | 2012-10-10 | 福建立兴食品有限公司 | Preparation method of vacuum freeze-dried instant tomato-egg soup |
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2014
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Patent Citations (3)
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| CN1194113A (en) * | 1998-03-26 | 1998-09-30 | 宁夏杞星营养制品有限公司 | Vacuum freezing-dried wolfberry fruit powder and its processing technology |
| CN101579095A (en) * | 2009-06-22 | 2009-11-18 | 大连工业大学 | Technology for preparing medlar active freeze-dried powder and capsules |
| CN102715600A (en) * | 2011-09-20 | 2012-10-10 | 福建立兴食品有限公司 | Preparation method of vacuum freeze-dried instant tomato-egg soup |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107581451A (en) * | 2016-07-06 | 2018-01-16 | 重庆百农网投资有限公司 | A kind of method of lyophilized lotus seeds |
| CN109170869A (en) * | 2018-11-06 | 2019-01-11 | 胡爱娣 | A kind of American ginseng medlar Ultramicro-powder microwave vacuum freeze drying means |
| CN111557442A (en) * | 2020-05-09 | 2020-08-21 | 邢玉娇 | Proanthocyanidins lycium ruthenicum freeze-dried powder and preparation method thereof |
| CN115769880A (en) * | 2022-12-20 | 2023-03-10 | 济南纯臻生态农业发展有限公司 | Preparation method of lyophilized royal jelly powder product |
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