CN106316784A - Method for preparing xylitol with camellia oleifera shells - Google Patents
Method for preparing xylitol with camellia oleifera shells Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/132—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group
- C07C29/136—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH
- C07C29/14—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of a —CHO group
- C07C29/141—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group of >C=O containing groups, e.g. —COOH of a —CHO group with hydrogen or hydrogen-containing gases
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/02—Monosaccharides
Abstract
The invention discloses a method for preparing xylitol with camellia oleifera shells and relates to the technical field of biological medicine. The method includes the steps of 1), material selecting; 2), soaking; 3), drying; 4), smashing; 5), fermenting; 6), homogenizing; 7), hydrolyzing; 8), performing enzymolysis; 9), decoloring; 10), neutralizing; 11), mixing; 12), performing column chromatography isolation; 13), concentrating; 14), freezing; 15), performing hydrogenation; 16), crystallizing. The method has the advantages of wide sources of the raw materials, low production cost, good product quality and the like, and the method is suitable for preparing the xylitol with the camellia oleifera shells and preparing the xylitol with agricultural crops of corncobs, begasse and the like.
Description
Technical field
The present invention relates to biomedicine technical field, a kind of shell of Camelliaoleifera Abel prepares the method for xylitol.
Background technology
Xylitol is a kind of sweet substance with nutritive value, is also the normal intermediate of human body carbohydate metabolism.Certainly
So in boundary, xylitol is widely present in various water fruits and vegetables, but content is the lowest.At present, commodity xylitol is to use jade mostly
In the agricultural crops such as meter Xin, bagasse, prepared through deep processing, its extraction process mainly has neutralization deacidifying process and ion
Exchange deacidifying process.
It neutralizes deacidifying process process: raw material → hydrolysis → neutralization → concentration → decolouring → ion exchanges → concentrates → and adds
Hydrogen → concentration → crystallization → separation → packaging.
Its ion exchange deacidifying process process is: raw material → hydrolysis → decolouring → ion exchange → concentration → ion exchange →
Hydrogenation → ion exchange → concentrate → crystallization → separate → packaging.
Shell of Camelliaoleifera Abel is the epidermis shell after camellia oleifera fruit separates Semen Camelliae, containing tea saponin, Camellia Oleifera polysaccharide, camellia oleosa seed in shell of Camelliaoleifera Abel
The active substance of the values such as albumen.At present, in major part rural area and mountain area, shell of Camelliaoleifera Abel is not to be dropped to be used to combustion exactly
Burning takes slow, a small amount of activated carbon that is used to prepare, thus, both waste resource, pollute again environment.
Chinese patent (number of patent application is 201510488115.4) is disclosed " a kind of utilizes tea fruit shell to prepare xylitol
Method ", its preparation process includes: raw tea material shell uses sulphuric acid hydrolysis after pulverizing, and gained hydrolyzed solution uses CaCO again3During emulsion is carried out
With, obtaining sugar liquid, gained sugar liquid uses activated carbon decolorizing after concentrating, purify sugar liquid by ion exchange further, finally utilize heat
Band candida mycoderma carries out bioconversion and obtains xylitol.
Summary of the invention
It is an object of the invention to provide that a kind of raw material sources are wide, production cost is low, prepared by the xylitol of superior product quality
Method.
For achieving the above object, the technical measures that the present invention is taked are to invent a kind of shell of Camelliaoleifera Abel to prepare the side of xylitol
Method, its preparation process is as follows:
(1), select materials: select without rotting, without going mouldy, without pest and disease damage, fresh shell of Camelliaoleifera Abel, standby；
, soak: shell of Camelliaoleifera Abel is put into 2-5 times of weight, volumetric concentration be 75-85% edible ethanol in, normal at room temperature
8-20h is soaked in pressure, filters off soak, adds 2-5 times of weight, volumetric concentration is the edible ethanol of 35-50%, at 45-55
Soak 30-50min at DEG C, filter, collect and soak shell of Camelliaoleifera Abel, standby；
(3), be dried: immersion shell of Camelliaoleifera Abel is transferred in baking oven, 65-70 DEG C, be dried under normal pressure to water content and be less than
8%, obtain dry shell of Camelliaoleifera Abel, standby；
(4), pulverize: then dry shell of Camelliaoleifera Abel is ground into the shell of Camelliaoleifera Abel granule of 5-20 mesh, standby；
(5), fermentation: addition accounts for its weight 25-35% in shell of Camelliaoleifera Abel granule, temperature is the water of 35-40 DEG C, is simultaneously introduced
Account for the leaven of crude oil Camellia oleifera Abel weight 8-15.5%, 28-35 DEG C of lower seal fermentation process 1-3 days, become ferment oil Camellia oleifera Abel
Grain, standby；
, homogenizing: ferment oil Camellia oleifera Abel granule is processed into uniform ferment oil Camellia oleifera Abel material through homogenizer at normal temperatures, standby
With；
(7), hydrolysis: adding in ferment oil Camellia oleifera Abel material with crude oil Camellia oleifera Abel granule identical weight, weight concentration is 1.5-
The sour water of 3.0%, stirs evenly, and is heated to 110-140 DEG C by the programming rate of 5-10 DEG C/min, heats while stirring, then exists
Pressure is process 2.5-4.0h under 1.25-1.5MPa；Thereafter, when being naturally cooling to 70-80 DEG C, filter, collect shell of Camelliaoleifera Abel respectively
Hydrolyzed solution and shell of Camelliaoleifera Abel slag, standby；
(8), enzymolysis: shell of Camelliaoleifera Abel slag clear water or aqueous alkali that weight concentration is 0.5-1.5% are cleaned 2-3 time, drains；Again
Add and account for the xylanase of its weight 1.2-2.5%, the papain of 0.1-0.5%, the calcium sulfate of 0.5-1.2%, 0.2-
The magnesium phosphate of 1.0%, mixing, process 20-38h at 20-30 DEG C of lower seal；It is subsequently adding and accounts for shell of Camelliaoleifera Abel slag weight 2-3 times, 40-
The warm water of 50 DEG C, processes 20-40min, filters, and collects shell of Camelliaoleifera Abel slag enzymolysis Aqueous extracts, standby；
(9), decolouring: add the decolorising agent accounting for its weight 15-25% in shell of Camelliaoleifera Abel hydrolyzed solution, at 70-80 DEG C at stirring
Reason, stir speed (S.S.) is 50-60r/min, when the transmittance of shell of Camelliaoleifera Abel hydrolyzed solution reaches more than 85%, filters, collects shell of Camelliaoleifera Abel
Decolouring hydrolyzed solution, standby；
(10), neutralize: being slowly added to, in shell of Camelliaoleifera Abel decolouring hydrolyzed solution, the aqueous alkali that weight concentration is 5-10%, limit edged stirs,
When the pH value of shell of Camelliaoleifera Abel decolouring hydrolyzed solution reaches 6.0-6.5, obtain shell of Camelliaoleifera Abel neutralizing hydrolysis liquid, standby；
(11), mixing: shell of Camelliaoleifera Abel slag enzymolysis Aqueous extracts and shell of Camelliaoleifera Abel neutralizing hydrolysis liquid are mixed, after stirring evenly, the most quiet puts 4-
8h, filters, obtains shell of Camelliaoleifera Abel mixed hydrolysis liquid, standby；
(12), crossing post: shell of Camelliaoleifera Abel mixed hydrolysis liquid is heated to 35-45 DEG C, cross anion exchange resin while hot, flow velocity is
15-28L/h, collects anion exchange resin and crosses post liquid；Then anion exchange resin is crossed post liquid and crosses cation exchange resin,
Flow velocity is 10-20L/h, collects cation exchange resin and crosses post liquid；Cation exchange resin is crossed post liquid again and is heated to 50-60
DEG C, cross S-330 type macroporous adsorbent resin, flow velocity is 35-50L/h, collects macroporous adsorbent resin and crosses post liquid, standby；
(13), concentrate: macroporous adsorbent resin is crossed post liquid and puts in concentrator, temperature be 50-60 DEG C, pressure be 1-5KPa
Under conditions of, the 1/8-1/5 of concentration to original volume, obtain concentrated post liquid, standby；
(14), freezing: concentrated post liquid to be transferred in freezer, quiet 5-8h of putting at 0-6 DEG C, filter, collect supernatant liquid；
Being slowly added to the edible ethanol that volumetric concentration is more than 90% again in supernatant liquid, the volume making ethanol in supernatant liquid is dense
Degree reaches 45-65%, then, quiet in freezer puts to without Precipitation, filters, collect and precipitate, standby；
(15), hydrogenation: the clear water of precipitation equivalent weight is dissolved, is simultaneously introduced the hydrogenating catalytic accounting for Sediment weight 3-5%
Agent, stirs evenly；Then pressure be 5-10MPa, temperature be 120-150 DEG C, the speed that is passed through of hydrogen be 1-2.5m3Process under/h
60-75min, obtains the xylitol liquid after hydrogenation, standby；
(16), crystallization: xylitol liquid is transferred in freezer, simultaneously with the edible ethanol regulation that volumetric concentration is more than 95%
Concentration of alcohol in xylitol liquid is more than 65%, then, quiet puts to without Precipitation, filters, collect xylitol precipitation；So
After, xylitol precipitate with deionized water is dissolved, filters, then drying, pulverizing, obtain xylitol.
Leaven described in fermentation procedure can be cellulase or yeast, it is also possible to be by calcium sulfate, Sorghum vulgare Pers. powder,
Cellulase, yeast press (0.2-0.35): the part by weight of (4-6): 0.2:1 mixes.
Sour water described in hydrolyzing process is the aqueous solution of one or more in hydrochloric acid, sulphuric acid, oxalic acid, when for two kinds with
Time upper, weight portion or other ratio such as the ratio of each component is.
In hydrolyzing process, heating while stirring, its stir speed (S.S.) is 15-25r/min.
Decolorising agent described in bleaching process can be neutral active charcoal granule or neutral kieselguhr or silica gel, it is also possible to is
By neutral active charcoal granule, neutral kieselguhr, 80-120 mesh silica gel by 1:(1-1.5): the part by weight of (0.3-0.45) is joined
System mixes.
Aqueous alkali described in neutralization step is the aqueous solution of one or more in sodium hydroxide, calcium hydroxide, sodium carbonate,
When for time two or more, weight portion or other ratio such as the ratio of each component is.
Anion exchange resin is strong-base anion-exchange resin or other anion exchange resin, and cation exchanges
Resin is weak-acid cation-exchange resin or other cation exchange resin.
The method preparing xylitol with shell of Camelliaoleifera Abel of the present invention, be use discarded shell of Camelliaoleifera Abel as raw material, thus, it is former
Material source is wide.Meanwhile, devise enzymolysis operation, the fibre structure of the shell of Camelliaoleifera Abel that loosened further so that hydrolysis effect is more in addition
Thoroughly, more efficient, it is higher that product goes out rate, and production cost is relatively low.Additionally, have employed the second of variable concentrations in early stage operation
Alcohol processes, and decreases such as the content of tea saponin, tea polysaccharide, tea albumen etc., it is to avoid its impact on subsequent operation；And crossing post work
Sequence takes two step resin treatment, efficiently eliminates the impurity of residual, it is to avoid on product appearance and the impact of subsequent operation, therefore
Prepared product quality is preferable.
Table 1 below is the active ingredient detection data of the xylitol prepared by method of the application present invention:
Table 1 (content of 100g)
| Composition | Content (g) |
| Xylitol | 96.52 |
| Xylose | 1.125 |
| Glucose | 0.562 |
| Polysaccharide | 0.025 |
From upper table data it can be seen that the xylitol prepared by method of the application present invention, content is high, quality better, is suitable for
The application in each field.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated.Description below is in the way of enumerating, but this
Bright protection domain is not limited thereto.
The method preparing xylitol with shell of Camelliaoleifera Abel of the present embodiment, its preparation process is as follows:
(1), select materials: select without rotting, without going mouldy, without pest and disease damage, fresh shell of Camelliaoleifera Abel, standby；
, soak: shell of Camelliaoleifera Abel is put into 4 times of weight, volumetric concentration be 80% edible ethanol in, soak at normal temperatures and pressures
Bubble 18h, filters off soak, adds 3 times of weight, volumetric concentration is the edible ethanol of 45%, soaks 40min, mistake at 50 DEG C
Filter, collects and soaks shell of Camelliaoleifera Abel, standby；
(3), be dried: immersions shell of Camelliaoleifera Abel is transferred in baking oven, 68 DEG C, be dried under normal pressure to water content and be less than 8%,
Shell of Camelliaoleifera Abel must be dried, standby；
(4), pulverize: then dry shell of Camelliaoleifera Abel is ground into the shell of Camelliaoleifera Abel granule of 15 mesh, standby；
, fermentation: add in shell of Camelliaoleifera Abel granule account for its weight 30%, temperature is the water of 38 DEG C, be simultaneously introduced and account for crude oil
Camellia oleifera Abel weight 12%, mixed by the part by weight of 0.3:5:0.2:1 by calcium sulfate, Sorghum vulgare Pers. powder, cellulase, yeast
Leaven, 30 DEG C of lower seal fermentation process 2 days, becomes ferment oil Camellia oleifera Abel granule, standby；
, homogenizing: ferment oil Camellia oleifera Abel granule is processed into uniform ferment oil Camellia oleifera Abel material through homogenizer at normal temperatures, standby
With；
(7), hydrolysis: adding in ferment oil Camellia oleifera Abel material with crude oil Camellia oleifera Abel granule identical weight, weight concentration is 2.2%
Oxalic acid aqueous solution, stir evenly, and be heated to 125 DEG C by the programming rate of 8 DEG C/min, heat while stirring, its stir speed (S.S.) is
20r/min, then processes 3.5h under pressure is 1.4MPa；Thereafter, when being naturally cooling to 75 DEG C, filter, collect oil tea respectively
Shell hydrolyzed solution and shell of Camelliaoleifera Abel slag, standby；
(8), enzymolysis: shell of Camelliaoleifera Abel slag clear water or aqueous alkali that weight concentration is 1.0% are cleaned 3 times, drains；Add and account for
The xylanase of its weight 1.8%, the papain of 0.3%, the calcium sulfate of 0.8%, the magnesium phosphate of 0.6%, mixing, 25
DEG C lower seal processes 30h；It is subsequently adding and accounts for shell of Camelliaoleifera Abel slag weight 3 times, the warm water of 45 DEG C, process 30min, filter, collect oil tea
Shell slag enzymolysis Aqueous extracts, standby；
(9), decolouring: add in shell of Camelliaoleifera Abel hydrolyzed solution account for its weight 20%, by neutral active charcoal granule, neutral kieselguhr,
The silica gel of 100 mesh is prepared the decolorising agent mixed, stir process at 75 DEG C, stirring speed by the part by weight of 1:1.25:0.4
Rate is 55r/min, when the transmittance of shell of Camelliaoleifera Abel hydrolyzed solution reaches more than 85%, filters, and collects shell of Camelliaoleifera Abel decolouring hydrolyzed solution, standby
With；
(10), neutralize: in shell of Camelliaoleifera Abel decolouring hydrolyzed solution, be slowly added to the aqueous sodium carbonate that weight concentration is 8%, Bian Jia
While stir, when the pH value of shell of Camelliaoleifera Abel decolouring hydrolyzed solution reaches 6.2, obtain shell of Camelliaoleifera Abel neutralizing hydrolysis liquid, standby；
, mixing: shell of Camelliaoleifera Abel slag enzymolysis Aqueous extracts and shell of Camelliaoleifera Abel neutralizing hydrolysis liquid are mixed, after stirring evenly, the most quiet put 6h,
Filter, obtain shell of Camelliaoleifera Abel mixed aqueous solution, standby；
(12), cross post: shell of Camelliaoleifera Abel mixed aqueous solution is heated to 40 DEG C, cross strong-base anion-exchange resin, flow velocity while hot
For 22L/h, collect anion exchange resin and cross post liquid；Then anion exchange resin is crossed post liquid and crosses Subacidity cation exchange
Resin, flow velocity is 15L/h, collects cation exchange resin and crosses post liquid；Cation exchange resin is crossed post liquid again and is heated to 55 DEG C,
Crossing S-330 type macroporous adsorbent resin, flow velocity is 42L/h, collects macroporous adsorbent resin and crosses post liquid, standby；
(13), concentrate: macroporous adsorbent resin is crossed post liquid and puts in concentrator, temperature be 55 DEG C, pressure be the bar of 3KPa
Under part, the 1/6 of concentration to original volume, obtain concentrated post liquid, standby；
(14), freezing: concentrated post liquid to be transferred in freezer, quiet 6h of putting at 2 DEG C, filter, collect supernatant liquid；Again to
Supernatant liquid is slowly added to the edible ethanol that volumetric concentration is more than 90%, makes the volumetric concentration of the ethanol in supernatant liquid reach
To 55%, then, quiet in freezer put to without Precipitation, filter, collect precipitation, standby；
(15), hydrogenation: the clear water of precipitation equivalent weight is dissolved, is simultaneously introduced the hydrogenation catalyst accounting for Sediment weight 4%
(metallic nickel), stirs evenly；Then pressure be 8MPa, temperature be 135 DEG C, the speed that is passed through of hydrogen be 2.0m3Process under/h
70min, obtains the xylitol liquid after hydrogenation, standby；
(16), crystallization: xylitol liquid is transferred in freezer, simultaneously with the edible ethanol regulation that volumetric concentration is more than 95%
Concentration of alcohol in xylitol liquid is more than 65%, then, quiet puts to without Precipitation, filters, collect xylitol precipitation；So
After, xylitol precipitate with deionized water is dissolved, filters, then drying, pulverizing, obtain xylitol.
The method preparing xylitol with shell of Camelliaoleifera Abel of the present invention, is suitable for preparing xylitol with shell of Camelliaoleifera Abel it can also be used to use
The agricultural crops such as corn cob, bagasse prepares xylitol.
Claims (6)
1. the method preparing xylitol with shell of Camelliaoleifera Abel, it is characterised in that preparation process is as follows:
(1), select materials: select without rotting, without going mouldy, without pest and disease damage, fresh shell of Camelliaoleifera Abel, standby；
, soak: shell of Camelliaoleifera Abel is put into 2-5 times of weight, volumetric concentration be 75-85% edible ethanol in, at normal temperatures and pressures
Soak 8-20h, filter off soak, add 2-5 times of weight, volumetric concentration is the edible ethanol of 35-50%, at 45-55 DEG C
Soak 30-50min, filter, collect and soak shell of Camelliaoleifera Abel, standby；
(3), be dried: immersions shell of Camelliaoleifera Abel is transferred in baking oven, 65-70 DEG C, be dried under normal pressure to water content less than 8%, must
It is dried shell of Camelliaoleifera Abel, standby；
(4), pulverize: then dry shell of Camelliaoleifera Abel is ground into the shell of Camelliaoleifera Abel granule of 5-20 mesh, standby；
, fermentation: in shell of Camelliaoleifera Abel granule add account for its weight 25-35%, temperature is the water of 35-40 DEG C, be simultaneously introduced account for former
The leaven of shell of Camelliaoleifera Abel weight 8-15.5%, 28-35 DEG C of lower seal fermentation process 1-3 days, becomes ferment oil Camellia oleifera Abel granule, standby
With；
, homogenizing: ferment oil Camellia oleifera Abel granule is processed into uniform ferment oil Camellia oleifera Abel material through homogenizer at normal temperatures, standby；
(7), hydrolysis: adding in ferment oil Camellia oleifera Abel material with crude oil Camellia oleifera Abel granule identical weight, weight concentration is 1.5-3.0%
Sour water, stir evenly, and be heated to 110-140 DEG C by the programming rate of 5-10 DEG C/min, heat while stirring, then at pressure be
2.5-4.0h is processed under 1.25-1.5MPa；Thereafter, when being naturally cooling to 70-80 DEG C, filter, collect shell of Camelliaoleifera Abel hydrolyzed solution respectively
With shell of Camelliaoleifera Abel slag, standby；
(8), enzymolysis: shell of Camelliaoleifera Abel slag clear water or aqueous alkali that weight concentration is 0.5-1.5% are cleaned 2-3 time, drains；Add
Account for the xylanase of its weight 1.2-2.5%, the papain of 0.1-0.5%, the calcium sulfate of 0.5-1.2%, 0.2-1.0%
Magnesium phosphate, mixing, process 20-38h at 20-30 DEG C of lower seal；Be subsequently adding account for shell of Camelliaoleifera Abel slag weight 2-3 times, 40-50 DEG C
Warm water, processes 20-40min, filters, and collects shell of Camelliaoleifera Abel slag enzymolysis Aqueous extracts, standby；
, decolouring: add in shell of Camelliaoleifera Abel hydrolyzed solution and account for the decolorising agent of its weight 15-25%, stir process at 70-80 DEG C,
Stir speed (S.S.) is 50-60r/min, when the transmittance of shell of Camelliaoleifera Abel hydrolyzed solution reaches more than 85%, filters, and collects shell of Camelliaoleifera Abel decolouring
Hydrolyzed solution, standby；
(10), neutralize: being slowly added to, in shell of Camelliaoleifera Abel decolouring hydrolyzed solution, the aqueous alkali that weight concentration is 5-10%, limit edged stirs, and treats oil
When the pH value of Camellia oleifera Abel decolouring hydrolyzed solution reaches 6.0-6.5, obtain shell of Camelliaoleifera Abel neutralizing hydrolysis liquid, standby；
(11), mixing: by shell of Camelliaoleifera Abel slag enzymolysis Aqueous extracts and the mixing of shell of Camelliaoleifera Abel neutralizing hydrolysis liquid, after stirring evenly, the most quiet 4-8h of putting, mistake
Filter, obtains shell of Camelliaoleifera Abel mixed hydrolysis liquid, standby；
(12), crossing post: shell of Camelliaoleifera Abel mixed hydrolysis liquid is heated to 35-45 DEG C, cross anion exchange resin while hot, flow velocity is 15-
28L/h, collects anion exchange resin and crosses post liquid；Then anion exchange resin is crossed post liquid and crosses cation exchange resin, stream
Speed is 10-20L/h, collects cation exchange resin and crosses post liquid；Cation exchange resin is crossed post liquid again and is heated to 50-60 DEG C,
Crossing S-330 type macroporous adsorbent resin, flow velocity is 35-50L/h, collects macroporous adsorbent resin and crosses post liquid, standby；
(13), concentrate: macroporous adsorbent resin is crossed post liquid and puts in concentrator, temperature be 50-60 DEG C, pressure be the bar of 1-5KPa
Under part, the 1/8-1/5 of concentration to original volume, obtain concentrated post liquid, standby；
(14), freezing: concentrated post liquid to be transferred in freezer, quiet 5-8h of putting at 0-6 DEG C, filter, collect supernatant liquid；Again to
Supernatant liquid is slowly added to the edible ethanol that volumetric concentration is more than 90%, makes the volumetric concentration of the ethanol in supernatant liquid reach
To 45-65%, then, quiet in freezer put to without Precipitation, filter, collect precipitation, standby；
(15), hydrogenation: the clear water of precipitation equivalent weight is dissolved, is simultaneously introduced the hydrogenation catalyst accounting for Sediment weight 3-5%, stirs
Even；Then pressure be 5-10MPa, temperature be 120-150 DEG C, the speed that is passed through of hydrogen be 1-2.5m360-is processed under/h
75min, obtains the xylitol liquid after hydrogenation, standby；
(16), crystallization: xylitol liquid is transferred in freezer, simultaneously with the edible ethanol regulation xylose that volumetric concentration is more than 95%
Concentration of alcohol in alcohol liquid is more than 65%, then, quiet puts to without Precipitation, filters, collect xylitol precipitation；Then, will
Xylitol precipitate with deionized water is dissolved, and filters, then drying, pulverizing, obtains xylitol.
The method preparing xylitol with shell of Camelliaoleifera Abel the most according to claim 1, it is characterised in that: sending out described in fermentation procedure
Ferment agent is by (0.2-0.35) by calcium sulfate, Sorghum vulgare Pers. powder, cellulase, yeast: the mixing of the part by weight of (4-6): 0.2:1 and
Become.
The method preparing xylitol with shell of Camelliaoleifera Abel the most according to claim 1, it is characterised in that: the acid described in hydrolyzing process
Water is the aqueous solution of one or more in hydrochloric acid, sulphuric acid, oxalic acid, when for time two or more, the weight such as the ratio of each component is
Part or other ratio.
The method preparing xylitol with shell of Camelliaoleifera Abel the most according to claim 1, it is characterised in that: in hydrolyzing process, Bian Jia
Hot limit is stirred, and its stir speed (S.S.) is 15-25r/min.
The method preparing xylitol with shell of Camelliaoleifera Abel the most according to claim 1, it is characterised in that: taking off described in bleaching process
Toner be by neutral active charcoal granule, neutral kieselguhr, 80-120 mesh silica gel by 1:(1-1.5): the weight of (0.3-0.45)
Proportions mixes.
The method preparing xylitol with shell of Camelliaoleifera Abel the most according to claim 1, it is characterised in that: the alkali described in neutralization step
Water is the aqueous solution of one or more in sodium hydroxide, calcium hydroxide, sodium carbonate, when for time two or more, and joining of each component
Than for waiting weight portion or other ratio.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109053375A (en) * | 2018-07-30 | 2018-12-21 | 南京林业大学 | A kind of method that oil tea husk as raw material full constituent utilizes |
| CN110036827A (en) * | 2019-03-31 | 2019-07-23 | 贵州省贵福菌业发展有限公司 | A kind of oil tea shell breaking method |
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| CN109053375B (en) * | 2018-07-30 | 2021-05-11 | 南京林业大学 | Method for utilizing all components of oil-tea camellia shell raw material |
| CN110036827A (en) * | 2019-03-31 | 2019-07-23 | 贵州省贵福菌业发展有限公司 | A kind of oil tea shell breaking method |
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