CN105192666A - Preparation method for natural red jujube flavor - Google Patents
Preparation method for natural red jujube flavor Download PDFInfo
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Abstract
The invention provides a preparation method for natural red jujube flavor. The preparation method comprises the steps that red jujubes are adopted as raw materials, fragrance in the red jujubes is extracted through steam distillation, then red jujube distillate enters a rotating distillation cone for secondary extraction and concentration, and red jujube fragrance concentration liquid is obtained and refrigerated for standby application; the red jujubes processed through distillation are mixed with water by adding the water according to a certain proportion, pulping is performed, cooking and sterilizing are performed, then a pulp enzyme and amylase are added, and enzymolysis is performed on pectin and polysaccharides in the red jujubes to release the fragrance of the red jujubes; after enzyme deactivation is performed on the enzymatically hydrolyzed matter, rough filtration is performed to remove jujube peels and jujube cores, then ultrafiltration is performed through a ceramic composite film to obtain red jujube extraction juice, and the red jujube extraction juice is concentrated through a rotating cone thin film to obtain red jujube concentration juice; the fragrance of the extracted red jujube fragrance concentration liquid is refilled, and then the pure natural red jujube flavor is obtained. The red jujube flavor is heavy and complete in fragrance, mellow and full in mouthfeel and good in fluidity, not only is the unique fragrance of the red jujubes kept, but also the natural color and lustre of the red jujubes are kept, the active ingredients of the red jujubes are simultaneously achieved, and the red jujube flavor can be applied to beverages, dairy products, ice creams, cakes and health care products.
Description
Technical field
The present invention relates to a kind of preparation method of natural jujube essence, particularly a kind of method of natural jujube essence.
Background technology
Red date (Fructusjujube) has another name called date, for Rhamnaceae jujube (ZizyphusjujubaMill.), the thin meat of skin is thick, fragrant and sweet crisp strongly fragrant, be rich in protein, carbohydrate, vitamin, mineral matter, saponin, alkaloid and Flavonoid substances, there is high edibility, healthy nutritive value and medical value, have the good reputation of " woody grain, excellent tonic product ", is the health fruit integrating medicine, food, benefit three zones.Among the people also have saying of " solar eclipse three jujube, alive for evermore ", liking always deeply by broad masses.China is the country of origin of red date, is also red dates production state maximum in the world.
Along with the flourish of China's red dates industry and the innovation of foods processing technique, red date deep processing enterprise is continued to bring out out in the red date producing region that China is main, actively develop the development and production of red date deep processed product, the favourable raising with Technical facilities in production level of carrying out having promoted red date field of deep research work.At present, the finely processed product of domestic red date mainly contains jujube juice, red date fruit wine, jujube vinegar, red date fruit and vegetable drink, red date health care tea beverage, solid beverage of jujube etc., then few to the bibliographical information of the red date essence utilizing advanced technology pure natural to extract, research and development.The application in the food industry of red date essence widely, is the important class in food flavor, can be widely used in beverage, dairy products, Ice, cures, dessert etc.Along with the change of food configuration and consumption habit, client and consumer more and more favor safe, green, natural, healthy essence product, and current red date essence mainly or manually allocate form by being aided with a small amount of red date extract with synthesis material, therefore, develop a kind of client and consumer psychology demand of meeting, utilize advanced technology to improve the pure natural red date essence of red date added value imperative.
Summary of the invention
Object of the present invention, be the preparation method that a kind of natural jujube essence is provided, of the present invention with natural edible red date for raw material, the technology such as rotating cone thin-film distillation (SCC system), enzymolysis biotechnology, ceramic composite membrane ultrafiltration and rotating cone film concentrated (CT) are utilized to prepare the preparation method of natural jujube essence, both remain peculiar fragrance and the medical value of red date, remain again the natural jujube essence of red date natural colour.
Preparation method of the present invention in turn includes the following steps:
(1) red date after cleaning is carried out steam distillation, collect distillate according to the mass ratio of red date and distillate 1:2 ~ 1:10;
(2) take steam as thermal source, open vacuum, set vacuum as-60 ~-85Kpa, and open one-level condensation and B-grade condensation simultaneously, the fragrance component in concentration step (1) red date distillate is extracted with rotating cone destilling tower (SCC system), obtain red date fragrance concentrate stand-by 0 ~ 10 DEG C of refrigeration, process conditions are: steam pressure 500 ~ 800kpa, charging rate 400 ~ 600L/h, system temperature 60 ~ 100 DEG C, temperature of charge 60 ~ 99 DEG C, inner extraction rate 2.5 ~ 15.0%, outside extraction yield 0.1 ~ 10.0%;
(3) step (1) distilled red date and water are pulled an oar according to the mass ratio mixing of 1:3 ~ 1:15, through 95 ~ 100 DEG C of boiling sterilizations, pulp enzyme and diastatic mixed enzyme enzymolysis is added after temperature is down to 45 ~ 50 DEG C, pulp enzyme addition is 0.2 ~ 2 ‰ of red date quality, amylase addition is 0.2 ~ 2 ‰ of red date quality, enzymatic hydrolysis condition is: hydrolysis temperature 30 ~ 65 DEG C, enzymolysis time 1 ~ 5h;
(4) the red date zymolyte 85 ~ 95 DEG C that step (3) obtains is gone out after enzyme 15 ~ 20min, through 40 order ~ 80 order coarse filtration removing fructus corni and jujube cores, obtain without naked eyes visible foreign, the red date slurry of good fluidity;
(5) red date slurry step (4) obtained is through the ultrafiltration of Ceramic Composite film device, and the red date obtaining clear extracts juice.Operating condition is: total filter area 0.5m
2, operating temperature normal temperature ~ 60 DEG C, operating pressure 0.2 ~ 0.3Mpa;
(6) red date extraction juice step (5) obtained concentrates through rotating cone film (CT) and obtains red date inspissated juice.Controlling red date inspissated juice soluble solid content Brix is mass percent 70 ~ 80.Operating condition is: charging rate 40 ~ 70L/h, system temperature 40 ~ 60 DEG C, and the heating-up temperature of material is 80 ~ 100 DEG C.
(7) fragrance backfill: red date fragrance concentrate step (2) obtained backfills to be allocated into red date inspissated juice, keep 15 ~ 20min sterilization at 85 ~ 95 DEG C after fragrance backfill, obtained final products soluble solid content Brix is the pure natural red date essence of mass percent 50 ~ 70.
Red date used in described step (1) is edible red date, kind comprises the variety of the Chinese date, winter jujube, pear and date-printing blocks, grey jujube, heart jujube, praises yellow date, seedless jujube, Linze jujube, plate jujube, fine horse jujube, phase jujube, and the place of production of red date, size, drying degree are not limit.
Backfilled by red date fragrance concentrate fragrance in described step (7) and select part backfill or all backfill into allotment during red date inspissated juice, part backfill amount is 10% ~ 99% of red date concentrate quality.
The rotating cone thin-film distillation (SCC system) of above-mentioned preparation method is a kind of distillation extraction system, is the state-of-the-art stripping system in the current world, is specially adapted to stripping and preserves fragrance matter, and extraction solable matter.SCC is a continuous print still-process, can intactly extract raw-material fragrance component, and the time of staying is extremely short, running temperature is low, efficiently avoid material fragrance loss at high temperature and thermal degradation, the product quality produced with SCC far surpasses the product produced with traditional approach.
Enzymolysis is one of of paramount importance step in jujube juice process, directly affects the nutritive value of jujube juice and the stripping of soluble solid.In red date inspissated juice production process, by adding the mode of enzyme preparation, decompose cell membrane intermediate layer and insoluble macromolecule protopectin, reduce viscosity, and the functional components such as amino acid, polypeptide, polysaccharide, fragrance, aliphatic acid can be made fully to dissolve, improve the content of soluble solid and total reducing sugar in jujube juice, enhance aroma strength.Pulp enzyme is the complex enzyme of pectase, cellulase and hemicellulase, and pectase can decompose pectin, improves the extraction performance of pulp; Cellulase and hemicellulase can destroy the institutional framework of red date pulp cell membrane, multiple nutritional components contained in the more red dates of stripping and physiological activator; The starch contained in amylorrhexis red date, improves the content of reduced sugar, adds the stability of product.Facts have proved, the use of pectase is very important for extraction clarifying jujube juice, because cause the main cause of jujube juice muddiness to be containing a large amount of pectin substances in jujube juice, and some albumen and polyphenols, by the use of pectase, reduce the difficulty of subsequent technique process, improve the color and luster of product, improve the light transmittance of jujube juice and the quality stability of whole essence finished product, is indispensable means for producing high-end red date deep processed product.According to the action effect of different enzyme, can form complex enzyme or mixed enzyme enhancing hydrolysis result, complex enzyme is single enzyme enzymolysis red date comparatively, raw material recovery rate is high, red date extract nutritional labeling in juice and activity substance content high, and aromatic strong, without bitter taste, clear, color is purplish red.
Ceramic composite membrane is the anisotropic membrane be prepared from through special process with inorganic ceramic material, and in multichannel tubular structure, tube wall filter course gathers micropore.The operation principle of Ceramic Composite film device is cross-flow filtration, pressure-driven.Outside under stressed effect, material liquid flows in film tube passage, solvent and solubility small-molecule substance are through film and form permeate stream, soluble large molecule material and suspension tunicle retain and form dope and be back to head tank, enter film tube passage through circulating pump pressure-raising more so constantly to circulate, continuously outflowing facing to permeate, being trapped substrate concentration can progressively improve, finally release from head tank and pipe-line system, thus reach the object of separation and purification.The separation selectivity of ceramic membrane ultrafitration is good, can according to the milipore filter wanting the particle diameter of separate substance and molecular mass size to select different trapped molecular weight, not only remove sediment wherein and suspension, also effective removing easily causes the protein of muddiness or precipitation, large molecular phenolics compound, the materials such as pectin, keep stability, Shelf-life, Restrain browning, and in separation process, do not need heating, separated material can not be destroyed, be particularly suitable for the processing of heat-sensitive materials, remain compound nutrition and local flavor being had to significant contribution simultaneously, it is the key improving product quality and nutritive value.
Rotating cone film concentrated (CT) can form liquid film material from getting rid of bottom vaporization chamber to column surface continuously, bottom superfluous liquid falls back, liquid film evaporates along with tubing string rotates together, and concentrate is washed down continuously, and liquid film then constantly upgrades.The maximum feature of CT is in small size, arrange larger heat-transfer area, the time of staying of material is short, operating temperature is low, be specially adapted to the concentrated of heat sensitive material, the change of contingent product color and the loss of special aroma composition can be avoided, and material can be concentrated into high solids and high viscosity, higher than the thickening efficiency of other concentrators, even if the solid content under surging condition in concentrate is also stablized.
Advantage of the present invention is:
Explore a practicable red date processing approach.Utilize rotating cone to distill this new technology of preparing, reextraction is carried out to the red date fragrance distillate of steam distillation and concentrates, larger than red date is directly extracted aroma strength with SCC, drastically increase the aroma strength of red date fragrance concentrate.Prepare red date with the red date through steam distillation simultaneously and extract juice, dry jujube rehydration can be omitted and soften this process, simplify processing step.Enzymolysis is utilized to clarify biotechnology, ceramic composite membrane hyperfiltration technique and concentrated (CT) technology of rotating cone film prepare red date inspissated juice, reduce the difficulty of subsequent technique process, avoid the degraded of fragrance matter in following process process and high temperature loss, remain nutritional labeling and the physiological activator of red date, the quality of product is made to obtain further guarantee, backfill the red date fragrance concentrate into concentrating through SCC reextraction again, can obtain give off a strong fragrance complete, naturally true to nature, mouthfeel is mellow and full full, coordinate soft, good fluidity is without precipitation, the natural jujube essence of colour stable, beverage can be widely used in, dairy products, ice cream, in cake and food ingredient.The present invention is according to the actual conditions of China and resources characteristic, explore the effective way of a red date preservation, for providing new thinking to the further investigation of red date deep processing and association area thereof from now on, and have laid a good foundation for the further Application and Development of red date.
Advantage of the present invention and innovative point are:
1, the present invention adopts fragrance reextraction to concentrate, first by steam distillation, the fragrance component in red date is separated, again red date distillate is carried out extraction to concentrate, concentrated by reextraction, significantly enhance the aroma strength of red date fragrance concentrate, decrease the fragrance loss of red date in follow-up a series of process.
2, the present invention's new technology, concentrated red date fragrance of new technology extraction of adopting rotating cone to distill.Rotating cone distillation has several large advantage: (1), by adjustment extraction yield, can extract the fragrance matter of different component respectively, until extract total material, instead of selective extraction, more can obtain more complete fragrance matter.(2) SCC temperature range of operation is 30 ~ 100 DEG C, can run under the low temperature of 30 DEG C, avoids material fragrance loss at high temperature.(3) very short by the residence time of raw material of SCC, lower than 20 seconds, this combined with cold operation, the fragrance matter avoiding recovery or the degraded processed raw material.
3, the present invention utilize through distilled red jujube for jujube slurry and concentrate jujube juice, eliminate dry jujube rehydration and soften this process, simplify processing step, substantially increase the utilization rate of red date, when enzymolysis clarification technique enzymolysis red date, utilize pulp enzyme and diastatic mixed enzyme, make the abundant enzymolysis of red date, be conducive to red date nutrient composition, the stripping of fragrance component, be conducive to red date and concentrate clarification of juice.
4, the present invention utilizes Ceramic Composite film device to carry out ultrafiltration to the jujube slurry after coarse filtration.The separation selectivity of ceramic membrane ultrafitration is good, can according to the milipore filter wanting the particle diameter of separate substance and molecular mass size to select different trapped molecular weight, not only remove sediment wherein and suspension, also effective removing easily causes the protein of muddiness or precipitation, large molecular phenolics compound, the materials such as pectin, keep stability, Shelf-life, Restrain browning, and in separation process, do not need heating, separated material can not be destroyed, be particularly suitable for the processing of heat-sensitive materials, remain compound nutrition and local flavor being had to significant contribution simultaneously, it is the key improving product quality and nutritive value.
5, the present invention utilizes concentrated (CT) technology of rotating cone film to concentrate the jujube slurry after ceramic membrane ultrafitration.The maximum feature of CT is in small size, arrange larger heat-transfer area, the time of staying of material is short, operating temperature is low, be specially adapted to the concentrated of heat sensitive material, the change of contingent product color and the loss of special aroma composition can be avoided, and material can be concentrated into high solids and high viscosity, higher than the thickening efficiency of other concentrators, even if the solid content under surging condition in concentrate is also stablized.
6, the present invention adopts fragrance backfilling process, backfills in red date inspissated juice, effectively maintain the red date fragrance concentrate that prior rotating cone distillation is extracted natural sense and the aroma strength of natural jujube essence, further increase product quality.
7, the natural jujube essence that prepared by the present invention is pure natural red date deep processed product, give off a strong fragrance complete, naturally true to nature, mouthfeel mellow and full full, coordinate soft, good fluidity is without precipitation, colour stable, had both remained the peculiar fragrance of red date, more remain the natural colour of red date, have the active component of red date concurrently, can be widely used in beverage, dairy products, ice cream, cake and food ingredient and health products.
Detailed description of the invention
Method of the present invention is described in detail below in conjunction with case study on implementation.
Embodiment one:
(1) variety of the Chinese date after cleaning is put into destilling tower, the place of production of the variety of the Chinese date, size, drying degree are not limit.According to the mass ratio of red date and distillate 1:4, carry out steam distillation with the speed of flow 800 ~ 900mL/min after steam condensing and collect distillate.
(2) rotating cone destilling tower is opened, take steam as thermal source, open one-level condensation and B-grade condensation simultaneously, open vacuum, set vacuum as-75Kpa, arranging outside extraction yield is 2.0%, treat stable equipment operation rear feeding, red date steam distillate is extracted, concentrates, obtain the red date fragrance concentrate that aroma strength concentrates 50 times, it is stand-by 0 ~ 10 DEG C of refrigeration.Its process conditions are: steam pressure 600 ~ 650kpa, charging rate 500L/h, system temperature 70 DEG C, temperature of charge 68 DEG C, inner extraction rate 4.5%, outside extraction yield 2.0%.
(3) pulling an oar according to the mass ratio mixing of 1:7 through step (1) distilled red date and water, through 95 ~ 100 DEG C of boiling sterilization 10 ~ 15min, pulp enzyme and amylase enzymolysis is added after temperature is down to 45 ~ 50 DEG C, pulp enzyme addition is 0.6 ‰ of red date quality, amylase addition is 0.2 ‰ of red date quality, hydrolysis temperature 55 DEG C, enzymolysis time 2hr.
(4) gone out by the red date zymolyte 85 ~ 95 DEG C that step (3) obtains after enzyme 15 ~ 20min, 60 order coarse filtration removing fructus corni and jujube cores, obtain without naked eyes visible foreign, the red date slurry of good fluidity.
(5) red date slurry step (4) obtained is through the ultrafiltration of Ceramic Composite film device, and choosing membrane aperture is 50nm film pipe, and operating condition is: total filter area 0.5m
2, operating temperature 35 DEG C, operating pressure 0.3Mpa.
(6) red date step (5) obtained extracts juice through the concentrated red date inspissated juice obtaining Brix70.2 of rotating cone film (CT), and operating condition is: charging rate 50L/h, system temperature 50 DEG C, and the heating-up temperature of material is 95 DEG C.
(7) fragrance backfill: red date fragrance concentrate step (2) obtained backfills to be allocated into red date inspissated juice, selectable portion backfills or all backfills, the present embodiment selects part backfill, backfill amount is for accounting for 10% of red date inspissated juice quality, 85 ~ 95 DEG C keep 15 ~ 20min sterilization, the pure natural red date essence of obtained soluble solid content Brix63.8.
Embodiment two:
(1) the heart jujube after cleaning is put into destilling tower, according to the mass ratio of red date and distillate 1:5, carry out steam distillation with the speed of flow 800 ~ 900mL/min after steam condensing and collect distillate.
(2) rotating cone destilling tower is opened, open one-level condensation and B-grade condensation simultaneously, set vacuum as-75Kpa, arranging outside extraction yield is 2.5%, treat stable equipment operation rear feeding, red date steam distillate is extracted, concentrates, obtain the red date fragrance concentrate that aroma strength concentrates 40 times, it is stand-by 0 ~ 10 DEG C of refrigeration.Its process conditions are: steam pressure 600 ~ 650kpa, charging rate 550L/Hr, system temperature 80 DEG C, temperature of charge 75 DEG C, inner extraction rate 4.8%, outside extraction yield 2.5%.
(3) pulling an oar according to the mass ratio mixing of 1:5 through step (1) distilled red date and water, through 95 ~ 100 DEG C of boiling sterilization 10 ~ 15min, pulp enzyme and amylase enzymolysis is added after temperature is down to 45 ~ 50 DEG C, pulp enzyme addition is 2 ‰ of red date quality, amylase addition is 2 ‰ of red date quality, hydrolysis temperature 50 DEG C, enzymolysis time 3hr.
(4) gone out by the red date zymolyte 85 ~ 95 DEG C that step (3) obtains after enzyme 15 ~ 20min, 40 order coarse filtration removing fructus corni and jujube cores, obtain without naked eyes visible foreign, the red date slurry of good fluidity.
(5) red date slurry step (4) obtained is through the ultrafiltration of Ceramic Composite film device, and choosing membrane aperture is 100nm film pipe, and operating condition is: total filter area 0.5m
2, operating temperature 35 DEG C, operating pressure 0.3Mpa.
(6) red date step (5) obtained extracts juice through the concentrated red date inspissated juice obtaining Brix73.5 of rotating cone film (CT), and operating condition is: charging rate 50L/h, system temperature 50 DEG C, and the heating-up temperature of material is 95 DEG C.
(7) fragrance backfill: red date fragrance concentrate step (2) obtained backfills to be allocated into red date inspissated juice, backfill amount is for accounting for 30% of red date inspissated juice quality, 85 ~ 95 DEG C keep 15 ~ 20min sterilization, the pure natural red date essence of obtained Brix56.5.
Embodiment three:
(1) the grey jujube after cleaning is put into destilling tower, according to the mass ratio of red date and distillate 1:7, carry out steam distillation with the speed of flow 800 ~ 900mL/min after steam condensing and collect distillate.
(2) rotating cone destilling tower is opened, open one-level condensation and B-grade condensation simultaneously, set vacuum as-75Kpa, arranging outside extraction yield is 5.0%, treat stable equipment operation rear feeding, red date fragrance distillate is extracted, concentrates, obtain the red date fragrance concentrate that aroma strength concentrates 20 times, it is stand-by 0 ~ 10 DEG C of refrigeration.Its process conditions are: steam pressure 600 ~ 650kpa, charging rate 600L/Hr, system temperature 70 DEG C, temperature of charge 68 DEG C, inner extraction rate 7.7%, outside extraction yield 5.0%.
(3) pulling an oar according to the mass ratio mixing of 1:10 through step (1) distilled red date and water, through 95 ~ 100 DEG C of boiling sterilization 10 ~ 15min, pulp enzyme and amylase enzymolysis is added after temperature is down to 45 ~ 50 DEG C, pulp enzyme addition is 0.6 ‰ of red date quality, amylase addition is 0.2 ‰ of red date quality, hydrolysis temperature 50 DEG C, enzymolysis time 2hr.
(4) gone out by the red date zymolyte 85 ~ 95 DEG C that step (3) obtains after enzyme 15 ~ 20min, 60 order coarse filtration removing fructus corni and jujube cores, obtain without naked eyes visible foreign, the red date slurry of good fluidity.
(5) red date slurry step (4) obtained is through the ultrafiltration of Ceramic Composite film device, and choosing membrane aperture is 50nm film pipe, and operating condition is: total filter area 0.5m
2, operating temperature 35 DEG C, operating pressure 0.2Mpa.
(6) red date step (5) obtained extracts juice through the concentrated red date inspissated juice obtaining Brix79.4 of rotating cone film (CT), and operating condition is: charging rate 50L/h, system temperature 60 DEG C, and the heating-up temperature of material is 90 DEG C.
(7) backfilled by the red date fragrance concentrate that step (2) obtains into the allotment of red date inspissated juice, backfill amount keeps 15 ~ 20min sterilization for 50%, 85 ~ 95 DEG C of accounting for red date inspissated juice quality, obtains the pure natural red date essence of Brix53.0.
Embodiment four:
Identical with embodiment one, difference is the red date used in described step (1) is edible red date, can be winter jujube, pear and date-printing blocks, any one of praising in yellow date, seedless jujube, Linze jujube, plate jujube, fine horse jujube, phase jujube, the place of production of red date, size, drying degree are not limit.The fragrance backfill of step (7) can according to product needed, and red date fragrance concentrate backfills backfill amount into the allotment of red date inspissated juice for accounting for 51 ~ 99% of red date inspissated juice quality or all backfilling, obtained pure natural red date essence.
Claims (6)
1. a preparation method for natural jujube essence, is characterized in that the method in turn includes the following steps:
(1) red date after cleaning is carried out steam distillation, collect distillate according to the mass ratio of red date and distillate 1:2 ~ 1:10;
(2) take steam as thermal source, with the fragrance component in the red date distillate of rotating cone destilling tower extraction concentration step (1), obtain red date fragrance concentrate, stand-by 0 ~ 10 DEG C of refrigeration.Process conditions are: steam pressure 500 ~ 800kpa, charging rate 400 ~ 600L/h, system temperature 60 ~ 100 DEG C, temperature of charge 60 ~ 99 DEG C, inner extraction rate 2.5 ~ 15.0%, outside extraction yield 0.1 ~ 10.0%;
(3) step (1) distilled red date and water are pulled an oar according to the mass ratio mixing of 1:3 ~ 1:15, through 95 ~ 100 DEG C of boiling sterilizations, enzyme-added enzymolysis after temperature is down to 45 ~ 50 DEG C, enzymatic hydrolysis condition is: hydrolysis temperature 30 ~ 65 DEG C, enzymolysis time 1 ~ 5h;
(4) gone out by the red date zymolyte 85 ~ 95 DEG C that step (3) obtains through coarse filtration removing fructus corni and jujube core after enzyme 15 ~ 20min, obtain without naked eyes visible foreign, the red date of good fluidity is starched;
(5) red date slurry step (4) obtained is through the ultrafiltration of Ceramic Composite film device, and the red date obtaining clear extracts juice.Operating condition is: total filter area 0.5m
2, operating temperature normal temperature ~ 60 DEG C, operating pressure 0.2 ~ 0.3Mpa.
(6) red date extraction juice step (5) obtained concentrates through rotating cone film and obtains red date inspissated juice, this red date inspissated juice soluble solid content (Brix) is mass percent 70 ~ 80, operating condition is: charging rate 40 ~ 70L/h, system temperature 40 ~ 60 DEG C, the heating-up temperature of material is 80 ~ 100 DEG C;
(7) fragrance backfill: red date fragrance concentrate step (2) obtained backfills to be allocated into red date inspissated juice, 15 ~ 20min sterilization is kept at 85 ~ 95 DEG C, the pure natural red date essence that obtained final products soluble solid content (Brix) is mass percent 50 ~ 70 after fragrance backfill.
2. the preparation method of the natural jujube essence according to right 1, it is characterized in that the red date used in described step (1) is edible red date, kind comprises the variety of the Chinese date, winter jujube, pear and date-printing blocks, grey jujube, heart jujube, praises yellow date, seedless jujube, Linze jujube, plate jujube, fine horse jujube, phase jujube, and the place of production of red date, size, drying degree are not limit.
3. the preparation method of the natural jujube essence according to right 1, when it is characterized in that described step (2) extraction concentrates red date fragrance, opens vacuum, sets vacuum as-60 ~-85Kpa, and open one-level condensation and B-grade condensation simultaneously.
4. the preparation method of the natural jujube essence according to right 1, it is characterized in that the enzyme added in described step (3) is pulp enzyme and diastatic mixed enzyme, pulp enzyme addition is 0.2 ~ 2 ‰ of red date quality, and amylase addition is 0.2 ~ 2 ‰ of red date quality.
5. the preparation method of the natural jujube essence according to right 1, is characterized in that the order number that in described step (4), coarse filtration uses is 40 ~ 80 orders.
6. the preparation method of the natural jujube essence according to right 1, it is characterized in that being backfilled by red date fragrance concentrate fragrance in the backfill of described step (7) fragrance selecting part backfill or all backfill into allotment during red date inspissated juice, part backfill amount is 10% ~ 99% of red date concentrate quality.
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| CN108703354A (en) * | 2018-04-27 | 2018-10-26 | 苏州禾田香料有限公司 | A kind of Chinese date type food flavor and production technology |
| CN111748412A (en) * | 2020-08-13 | 2020-10-09 | 湖北中烟工业有限责任公司 | Red date extract for cigarettes and preparation method and application thereof |
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| CN112715911A (en) * | 2020-12-28 | 2021-04-30 | 上海华宝孔雀香精有限公司 | Natural milk flavor essence and preparation method thereof |
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| CN111748412A (en) * | 2020-08-13 | 2020-10-09 | 湖北中烟工业有限责任公司 | Red date extract for cigarettes and preparation method and application thereof |
| CN112500950A (en) * | 2020-11-18 | 2021-03-16 | 西昌学院 | Potato beer production line |
| CN112715911A (en) * | 2020-12-28 | 2021-04-30 | 上海华宝孔雀香精有限公司 | Natural milk flavor essence and preparation method thereof |
| CN115161115A (en) * | 2022-06-22 | 2022-10-11 | 福建胜美鲜生物科技有限公司 | Seafood essence preparation process and preparation device thereof |
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