CN109651438A - A kind of preparation of modified oxidized magnesium and its application in L-Ascorbic Acid L-O-Phosphate - Google Patents

A kind of preparation of modified oxidized magnesium and its application in L-Ascorbic Acid L-O-Phosphate Download PDF

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CN109651438A
CN109651438A CN201910098383.3A CN201910098383A CN109651438A CN 109651438 A CN109651438 A CN 109651438A CN 201910098383 A CN201910098383 A CN 201910098383A CN 109651438 A CN109651438 A CN 109651438A
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phosphate
ascorbic acid
filtrate
vitamin
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李�昊
王虎
杨春树
李顺昌
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Anhui Smooth Biological Co Ltd
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Anhui Smooth Biological Co Ltd
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    • C07ORGANIC CHEMISTRY
    • C07FACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
    • C07F9/00Compounds containing elements of Groups 5 or 15 of the Periodic Table
    • C07F9/02Phosphorus compounds
    • C07F9/547Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom
    • C07F9/655Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having oxygen atoms, with or without sulfur, selenium, or tellurium atoms, as the only ring hetero atoms
    • C07F9/65515Heterocyclic compounds, e.g. containing phosphorus as a ring hetero atom having oxygen atoms, with or without sulfur, selenium, or tellurium atoms, as the only ring hetero atoms the oxygen atom being part of a five-membered ring

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Abstract

The invention discloses a kind of preparation of modified oxidized magnesium and its applications in L-Ascorbic Acid L-O-Phosphate, are related to biopharmaceutical technology.Phosphating reaction of the present invention carries out in aqueous solvent, does not use organic solvent, simple process, and environmentally safe, finished product L-Ascorbic Acid L-O-Phosphate purity is high, stability are good;Magnesia can form alloying structure in mgo surface by modified, and then can be improved the reactivity of magnesia and vitamin C phosphoric ester, accelerate reaction rate;There is stronger suction-operated to small molecule inorganic matter, pigment using polyethylene glycol, hydrolysis of polymaleic anhydride as the scarvenger of Material synthesis, the impurity in vitamin C phosphoric ester can be adsorbed, improves purity.

Description

A kind of preparation of modified oxidized magnesium and its application in L-Ascorbic Acid L-O-Phosphate
Technical field:
The present invention relates to biopharmaceutical technologies, and in particular to the preparation of a kind of modified oxidized magnesium and its in vitamin C Application in phosphate magnesium.
Background technique:
L-Ascorbic Acid L-O-Phosphate is a kind of vitamin C derivatives, and 2 hydroxyls, which are derived as phosphate, can be improved dimension life The stability of plain C can regenerate vitamin C after being formed by the phosphate hydrolysis that derivative is widely present in vivo, because It is a kind of valuable fine chemicals as the main component that feed addictive, food additive and superior cosmetics brighten.
Up to now, vitamin C phosphoric esterization mainly has two methods: first is that the phosphorylation of phosphorus oxychloride is (as Europe is public Open patent 388869 and 582924, United States Patent (USP) 4179445, the descriptions such as Japanese Unexamined Patent Publication No. 60-69079), with vitamin C is raw material, and the hydroxyl protection on 5 and 6 carbon gets up before esterification, i.e., it is raw first to carry out ketal reaction with acetone for vitamin C At 5,6- oxygen, one isopropylidene, one L, mono- ascorbic acid (5,6-0 mono- isopropylidene-L-ascorbic acid), then use pyrrole The dissolution of pyridine solution, KOH adjust pH value, and phosphorus oxychloride reaction is added dropwise, boils off multiple desalination after pyridine, are concentrated, then carry out cation Resins exchange collects eluent, MgO is added to react, and last low-carbon alcohols partial crystallization filtration drying is completed.Its product is mainly L- Vitamin C Acid -2- phosplate, by-product are mainly L-AA -3- phosphate and 2- pyrophosphate and two (ascorbic acid) -2, and 2 ' - Bisphosphate.Reaction product needs cumbersome procedure purify, and it is mixed that all reactions can not be dried with straightforward procedure Close object.Second method is to carry out phosphorylation using phosphate to obtain such as the method for United States Patent (USP) 4647672 and 5110950 Primary product is L-AA -2- polyphosphate, and when such as using sodium trimetaphosphate, product is L-AA -2- triphosphoric acid Ester, but also contain a certain proportion of L-AA -2- phosplate.The former can be monophosphate by excessive alkaline degradation Ester, stoichiometric ratio and specific reaction condition of the ratio depending on starting material.The purifying L-ascorbic acid-from mixture 2- phosplate, which is also not, can simply accomplish, the inorganic salts residual in product is often very high.Although this method synthetic route is short, By-product is more, and product separating-purifying is difficult, and total yield of products is low.The synthesis technology of traditional L-Ascorbic Acid L-O-Phosphate is complicated, miscellaneous Matter is more, and is damaged using organic solutions such as acetone to environment.
Summary of the invention:
Technical problem to be solved by the present invention lies in the preparation for providing a kind of modified oxidized magnesium and its in vitamin C phosphoric acid Application in ester magnesium.
The following technical solution is employed for the technical problems to be solved by the invention to realize:
The modification method for preparing of magnesia are as follows: magnesia is added in dehydrated alcohol, 40 DEG C of ultrasonic disperse stirrings Then Ni nanoparticle (OH) is added in 10min2, silane coupling agent be heated to reflux state insulated and stirred 30-50min, be cooled to 50 DEG C Silicon-dioxide powdery is added, continues insulated and stirred 1-2h, filters while hot, filter cake washes away impurity with dehydrated alcohol, and 50 DEG C of vacuum are dry It is dry to constant weight.
The magnesia, silicon-dioxide powdery, Ni (OH)2, silane coupling agent mass ratio be 1-2:0.1-0.3:0.1- 0.2:0.05-0.08.
Preferably, the concentration of silicon-dioxide powdery is 1-8g/L, partial size 70-120nm.
Magnesia passes through silicon-dioxide powdery, Ni (OH)2, silane coupling agent it is modified, can be formed in mgo surface Alloying structure, and then can be improved the reactivity of magnesia and L-AA, accelerate reaction rate;
Application of the modified oxidized magnesium in L-Ascorbic Acid L-O-Phosphate preparation, comprising the following steps:
(1) by vitamin C, anhydrous calcium chloride, deionized water according to 1: (0.08-0.4): temperature is added in the mass ratio of (1-5) To stir 2-3 hours, then the sodium hydrate aqueous solution of concentration 30-70% is added dropwise in -10-20 DEG C of reaction kettle, adjust PH is degree 5-10.5 adds the sodium trimetaphosphate of 1-2.5 times of vitamin C dosage, maintains the temperature at 25-45 DEG C, reacts 2-6 hours, mistake Filter obtains solid;
(2) obtained solid is added in charging basket washer and is washed with water, at 30 DEG C of oxalic acid of addition solid masses 60-70% 2h is stirred, filtering, gained filtrate is vitamin C phosphoric ester crude product;
(3) vitamin C phosphoric ester crude product is subjected to nanofiltration membrane through rolling nano-filtration membrane filter;
(4) filtrate that step (3) is obtained by filtration is added in reaction kettle, through weak-base anion-exchange resin, successively uses 0.05M hydrochloric acid and the elution of 0.5M-1.5M hydrochloric acid, collect elution fraction, and elution fraction adjusts pH with magnesia under constant stirring For 7-11, obtained reactant is L-Ascorbic Acid L-O-Phosphate filtrate;
(5) scarvenger of filtrate quality 3-5%, 35-40 DEG C of stirring 20- are added into L-Ascorbic Acid L-O-Phosphate filtrate 40min is filtered while hot;Filtrate is concentrated under reduced pressure into 1/5th of original volume in 30 DEG C, and it is that 3-6 times of filtrate of concentration contains that volume, which is added, Then the ethyl alcohol that amount is 95% is dried by spray dryer to get L-Ascorbic Acid L-O-Phosphate finished product is arrived.
The temperature of the rolling nano-filtration membrane filter import is 120-140 DEG C, the temperature of rolling nano-filtration membrane filter outlet It is 30-50 DEG C;Nanofiltration membrane has nanoscale aperture, and the molecular cut off of nanofiltration membrane is 500-1500, rolling nano-filtration membrane filter There is higher removal efficiency to inorganic salts, removal efficiency is 90~98%.
The drying temperature of the spray drying is 140-160 DEG C, drying time 30-40min.
The scarvenger the preparation method comprises the following steps: polyethylene glycol is added in pure water, then 30 stirring 10min are added Hydrolysis of polymaleic anhydride and tetraethyl titanate are heated to reflux state insulated and stirred 05-2h, are cooled to 60-65 DEG C, and castor-oil plant is added Oil stirring 20-30min, is filtered while hot, and solid washes away impurity with pure water, dry to constant weight.
The polyethylene glycol, hydrolysis of polymaleic anhydride, tetraethyl titanate, castor oil mass ratio be 1-2:1-2:0.01: 0.1-0.2。
The beneficial effects of the present invention are:
(1) magnesia can form alloying structure in mgo surface by modified, so can be improved magnesia with The reactivity of vitamin C phosphoric ester accelerates reaction rate;Using polyethylene glycol, hydrolysis of polymaleic anhydride as the pure of Material synthesis Agent has stronger suction-operated to small molecule inorganic matter, pigment, can adsorb the impurity in vitamin C phosphoric ester, improves pure Degree;
(2) phosphating reaction of the present invention carries out in aqueous solvent, does not use organic solvent, entire simple process, not only Phosphating reaction speed is accelerated, shortens the reaction time, and environmentally safe;Using nanofiltration membrane process, impurity removal High-efficient, finished product L-Ascorbic Acid L-O-Phosphate is with high purity, and stability is good.
Specific embodiment:
In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below Specific embodiment is closed, the present invention is further explained.
Embodiment 1
(1) temperature is added according to 1: 0.2: 2 mass ratio in vitamin C, anhydrous calcium chloride, deionized water is 10 DEG C anti- It answers in kettle, stirs 2 hours, then the sodium hydrate aqueous solution of concentration 40% is added dropwise, adjusting PH is 7, adds 2 times of vitamin Cs and uses The sodium trimetaphosphate of amount maintains the temperature at 30 DEG C, reacts 4 hours, solid is obtained by filtration;
(2) obtained solid is added in charging basket washer and is washed with water, stirred in 30 DEG C of oxalic acid that solid masses 60% is added 2h is mixed, is filtered, gained filtrate is vitamin C phosphoric ester crude product;
(3) vitamin C phosphoric ester crude product is subjected to nanofiltration membrane through rolling nano-filtration membrane filter;
(4) filtrate that step (3) is obtained by filtration is added in reaction kettle, through weak-base anion-exchange resin, successively uses Elution fraction is collected in 0.05M hydrochloric acid and the elution of 1.5M hydrochloric acid, and it is 8 that elution fraction, which adjusts pH with magnesia under constant stirring, is obtained The reactant arrived is L-Ascorbic Acid L-O-Phosphate filtrate;
(5) into L-Ascorbic Acid L-O-Phosphate filtrate be added filtrate quality 3% scarvenger, 35 DEG C of stirring 40min, while hot Filtering;Filtrate is concentrated under reduced pressure into 1/5th of original volume in 30 DEG C, and it is that the second that 3 times of contents of filtrate are 95% is concentrated that volume, which is added, Then alcohol is dried by spray dryer to get L-Ascorbic Acid L-O-Phosphate finished product is arrived;The drying temperature of spray drying is 140 DEG C, drying time 30min.
The modification of magnesia: 1.2 parts of magnesia is added in dehydrated alcohol, 40 DEG C of ultrasonic disperse stirrings Then 0.1 part of Ni nanoparticle (OH) is added in 10min2, 0.05 part of silane coupling agent kh550 be heated to reflux state insulated and stirred 30min is cooled to 50 DEG C of additions, 0.2 part of silica powder, continues insulated and stirred 1.5h, filters while hot, filter cake dehydrated alcohol Impurity is washed away, 50 DEG C are dried under vacuum to constant weight.
The preparation of scarvenger: 1.2 parts of polyethylene glycol are added in pure water, then 1 part of water is added in 30 stirring 10min Polymaleic anhydride and 0.01 part of tetraethyl titanate are solved, reflux state insulated and stirred 2h is heated to, is cooled to 60 DEG C, is added 0.1 part Castor oil stirs 20min, filters while hot, and solid washes away impurity with pure water, dry to constant weight.
Embodiment 2
(1) temperature is added according to 1: 0.1: 3 mass ratio in vitamin C, anhydrous calcium chloride, deionized water is 15 DEG C anti- It answers in kettle, stirs 3 hours, then the sodium hydrate aqueous solution of concentration 50% is added dropwise, adjusting PH is 8, adds 2.5 times of vitamin Cs The sodium trimetaphosphate of dosage maintains the temperature at 45 DEG C, reacts 5 hours, solid is obtained by filtration;
(2) obtained solid is added in charging basket washer and is washed with water, stirred in 30 DEG C of oxalic acid that solid masses 70% is added 2h is mixed, is filtered, gained filtrate is vitamin C phosphoric ester crude product;
(3) vitamin C phosphoric ester crude product is subjected to nanofiltration membrane through rolling nano-filtration membrane filter;
(4) filtrate that step (3) is obtained by filtration is added in reaction kettle, through weak-base anion-exchange resin, successively uses Elution fraction is collected in 0.05M hydrochloric acid and the elution of 1M hydrochloric acid, and it is 8.5 that elution fraction, which adjusts pH with magnesia under constant stirring, is obtained The reactant arrived is L-Ascorbic Acid L-O-Phosphate filtrate;
(5) into L-Ascorbic Acid L-O-Phosphate filtrate be added filtrate quality 5% scarvenger, 40 DEG C of stirring 30min, while hot Filtering;Filtrate is concentrated under reduced pressure into 1/5th of original volume in 30 DEG C, and it is that the second that 4 times of contents of filtrate are 95% is concentrated that volume, which is added, Then alcohol is dried by spray dryer to get L-Ascorbic Acid L-O-Phosphate finished product is arrived;The drying temperature of spray drying is 150 DEG C, drying time 40min.
The modification of magnesia: 1.2 parts of magnesia is added in dehydrated alcohol, 40 DEG C of ultrasonic disperse stirrings Then 0.1 part of Ni nanoparticle (OH) is added in 10min2, 0.05 part of silane coupling agent kh550 be heated to reflux state insulated and stirred 30min is cooled to 50 DEG C of additions, 0.2 part of silica powder, continues insulated and stirred 1.5h, filters while hot, filter cake dehydrated alcohol Impurity is washed away, 50 DEG C are dried under vacuum to constant weight.
The preparation of scarvenger: 1.2 parts of polyethylene glycol are added in pure water, then 1 part of water is added in 30 stirring 10min Polymaleic anhydride and 0.01 part of tetraethyl titanate are solved, reflux state insulated and stirred 2h is heated to, is cooled to 60 DEG C, is added 0.1 part Castor oil stirs 20min, filters while hot, and solid washes away impurity with pure water, dry to constant weight.
Reference examples 1
(1) temperature is added according to 1: 0.2: 2 mass ratio in vitamin C, anhydrous calcium chloride, deionized water is 10 DEG C anti- It answers in kettle, stirs 2 hours, then the sodium hydrate aqueous solution of concentration 40% is added dropwise, adjusting PH is 7, adds 2 times of vitamin Cs and uses The sodium trimetaphosphate of amount maintains the temperature at 30 DEG C, reacts 4 hours, solid is obtained by filtration;
(2) obtained solid is added in charging basket washer and is washed with water, stirred in 30 DEG C of oxalic acid that solid masses 60% is added 2h is mixed, is filtered, gained filtrate is vitamin C phosphoric ester crude product;
(3) vitamin C phosphoric ester crude product is subjected to nanofiltration membrane through rolling nano-filtration membrane filter;
(4) filtrate that step (3) is obtained by filtration is added in reaction kettle, through weak-base anion-exchange resin, successively uses Elution fraction is collected in 0.05M hydrochloric acid and the elution of 1.5M hydrochloric acid, and it is 8 that elution fraction, which adjusts pH with magnesia under constant stirring, is obtained The reactant arrived is L-Ascorbic Acid L-O-Phosphate filtrate;
(5) into L-Ascorbic Acid L-O-Phosphate filtrate be added filtrate quality 3% scarvenger, 35 DEG C of stirring 40min, while hot Filtering;Filtrate is concentrated under reduced pressure into 1/5th of original volume in 30 DEG C, and it is that the second that 3 times of contents of filtrate are 95% is concentrated that volume, which is added, Then alcohol is dried by spray dryer to get L-Ascorbic Acid L-O-Phosphate finished product is arrived;The drying temperature of spray drying is 140 DEG C, drying time 30min.
The preparation of scarvenger: 1.2 parts of polyethylene glycol are added in pure water, then 1 part of water is added in 30 stirring 10min Polymaleic anhydride and 0.01 part of tetraethyl titanate are solved, reflux state insulated and stirred 2h is heated to, is cooled to 60 DEG C, is added 0.1 part Castor oil stirs 20min, filters while hot, and solid washes away impurity with pure water, dry to constant weight.
Reference examples 2
(1) temperature is added according to 1: 0.2: 2 mass ratio in vitamin C, anhydrous calcium chloride, deionized water is 10 DEG C anti- It answers in kettle, stirs 2 hours, then the sodium hydrate aqueous solution of concentration 40% is added dropwise, adjusting PH is 7, adds 2 times of vitamin Cs and uses The sodium trimetaphosphate of amount maintains the temperature at 30 DEG C, reacts 4 hours, solid is obtained by filtration;
(2) obtained solid is added in charging basket washer and is washed with water, stirred in 30 DEG C of oxalic acid that solid masses 60% is added 2h is mixed, is filtered, gained filtrate is vitamin C phosphoric ester crude product;
(3) vitamin C phosphoric ester crude product is subjected to nanofiltration membrane through rolling nano-filtration membrane filter;
(4) filtrate that step (3) is obtained by filtration is added in reaction kettle, through weak-base anion-exchange resin, successively uses Elution fraction is collected in 0.05M hydrochloric acid and the elution of 1.5M hydrochloric acid, and it is 8 that elution fraction, which adjusts pH with magnesia under constant stirring, is obtained The reactant arrived is L-Ascorbic Acid L-O-Phosphate filtrate;
(5) into L-Ascorbic Acid L-O-Phosphate filtrate be added filtrate quality 3% scarvenger, 35 DEG C of stirring 40min, while hot Filtering;Filtrate is concentrated under reduced pressure into 1/5th of original volume in 30 DEG C, and it is that the second that 3 times of contents of filtrate are 95% is concentrated that volume, which is added, Then alcohol is dried by spray dryer to get L-Ascorbic Acid L-O-Phosphate finished product is arrived;The drying temperature of spray drying is 140 DEG C, drying time 30min.
The modification of magnesia: 1.2 parts of magnesia is added in dehydrated alcohol, 40 DEG C of ultrasonic disperse stirrings Then 0.1 part of Ni nanoparticle (OH) is added in 10min2, 0.05 part of silane coupling agent kh550 be heated to reflux state insulated and stirred 30min is cooled to 50 DEG C of additions, 0.2 part of silica powder, continues insulated and stirred 1.5h, filters while hot, filter cake dehydrated alcohol Impurity is washed away, 50 DEG C are dried under vacuum to constant weight.
Scarvenger: active carbon.
Reference examples 3
(1) temperature is added according to 1: 0.2: 2 mass ratio in vitamin C, anhydrous calcium chloride, deionized water is 10 DEG C anti- It answers in kettle, stirs 2 hours, then the sodium hydrate aqueous solution of concentration 40% is added dropwise, adjusting PH is 7, adds 2 times of vitamin Cs and uses The sodium trimetaphosphate of amount maintains the temperature at 30 DEG C, reacts 4 hours, solid is obtained by filtration;
(2) obtained solid is added in charging basket washer and is washed with water, stirred in 30 DEG C of oxalic acid that solid masses 60% is added 2h is mixed, is filtered, gained filtrate is vitamin C phosphoric ester crude product;
(3) vitamin C phosphoric ester crude product is subjected to nanofiltration membrane through rolling nano-filtration membrane filter;
(4) filtrate that step (3) is obtained by filtration is added in reaction kettle, through weak-base anion-exchange resin, successively uses Elution fraction is collected in 0.05M hydrochloric acid and the elution of 1.5M hydrochloric acid, and it is 8 that elution fraction, which adjusts pH with magnesia under constant stirring, is obtained The reactant arrived is L-Ascorbic Acid L-O-Phosphate filtrate;
(5) L-Ascorbic Acid L-O-Phosphate filtrate is concentrated under reduced pressure into 1/5th of original volume in 30 DEG C, it is dense that volume, which is added, Then the ethyl alcohol that 3 times of contents of contracting filtrate are 95% is dried by spray dryer to get L-Ascorbic Acid L-O-Phosphate finished product is arrived;Spray The dry drying temperature of mist is 140 DEG C, drying time 30min.
The modification of magnesia: 1.2 parts of magnesia is added in dehydrated alcohol, 40 DEG C of ultrasonic disperse stirrings Then 0.1 part of Ni nanoparticle (OH) is added in 10min2, 0.05 part of silane coupling agent kh550 be heated to reflux state insulated and stirred 30min is cooled to 50 DEG C of additions, 0.2 part of silica powder, continues insulated and stirred 1.5h, filters while hot, filter cake dehydrated alcohol Impurity is washed away, 50 DEG C are dried under vacuum to constant weight.
The preparation of L-Ascorbic Acid L-O-Phosphate is carried out using embodiment 1-2, reference examples 1-3, and its purity is measured, The results are shown in Table 1.
The purity of 1 L-Ascorbic Acid L-O-Phosphate of table
Test item Purity Free phosphorus hydrochlorate
Embodiment 1 99.7% < 0.3%
Embodiment 2 99.8% < 0.2%
Reference examples 1 91.9% < 0.6%
Reference examples 2 92.3% < 0.4%
Reference examples 3 85.4% < 0.7%
The purity test method is ultraviolet spectrophotometry.
The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention.The technology of the industry Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its Equivalent thereof.

Claims (5)

1. a kind of preparation of modified oxidized magnesium, which is characterized in that the preparation method comprises the following steps: magnesia is added in dehydrated alcohol, 40 DEG C ultrasonic disperse stirs 10min, and Ni nanoparticle (OH) then is added2, silane coupling agent be heated to reflux state insulated and stirred 30- 50min is cooled to 50 DEG C of addition silicon-dioxide powderies, continues insulated and stirred 1-2h, filters while hot, filter cake is washed away with dehydrated alcohol Impurity, 50 DEG C are dried under vacuum to constant weight.
2. the preparation of modified oxidized magnesium according to claim 1, it is characterised in that: the magnesia, silicon-dioxide powdery, Ni (OH)2, silane coupling agent mass ratio be 1-2:0.1-0.3:0.1-0.2:0.05-0.08.
3. a kind of application of the modified oxidized magnesium in L-Ascorbic Acid L-O-Phosphate as described in claim 1, it is characterised in that: including Following steps:
(1) by vitamin C, anhydrous calcium chloride, deionized water according to 1: (0.08-0.4): the mass ratio of (1-5) be added temperature be- It in 10-20 DEG C of reaction kettle, stirs 2-3 hours, then the sodium hydrate aqueous solution of concentration 30-70% is added dropwise, adjusting PH is 5- 10.5, the sodium trimetaphosphate of 1-2.5 times of vitamin C dosage is added, maintains the temperature at 25-45 DEG C, is reacted 2-6 hours, filtering Obtain solid;
(2) obtained solid is added in charging basket washer and is washed with water, in 30 DEG C of the oxalic acid stirrings that solid masses 60-70% is added 2h, filtering, gained filtrate is vitamin C phosphoric ester crude product;
(3) vitamin C phosphoric ester crude product is subjected to nanofiltration membrane through rolling nano-filtration membrane filter;
(4) filtrate that step (3) is obtained by filtration is added in reaction kettle, through weak-base anion-exchange resin, successively uses 0.05M Elution fraction is collected in hydrochloric acid and the elution of 0.5M-1.5M hydrochloric acid, and it is 7- that elution fraction, which adjusts pH with magnesia under constant stirring, 11, obtained reactant is L-Ascorbic Acid L-O-Phosphate filtrate;
(5) into L-Ascorbic Acid L-O-Phosphate filtrate be added filtrate quality 3-5% scarvenger, 35-40 DEG C of stirring 20-40min, It filters while hot;Filtrate is concentrated under reduced pressure into 1/5th of original volume in 30 DEG C, and it is that concentration 3-6 times of content of filtrate is that volume, which is added, Then 95% ethyl alcohol is dried by spray dryer to get L-Ascorbic Acid L-O-Phosphate finished product is arrived.
4. application of the modified oxidized magnesium in L-Ascorbic Acid L-O-Phosphate according to claim 3, which is characterized in that described pure Agent the preparation method comprises the following steps: polyethylene glycol is added in pure water, then hydrolysis of polymaleic anhydride is added in 30 stirring 10min And tetraethyl titanate, it is heated to reflux state insulated and stirred 05-2h, is cooled to 60-65 DEG C, castor oil is added and stirs 20- 30min is filtered while hot, and solid washes away impurity with pure water, dry to constant weight.
5. application of the modified oxidized magnesium in L-Ascorbic Acid L-O-Phosphate according to claim 4, it is characterised in that: described poly- Ethylene glycol, hydrolysis of polymaleic anhydride, tetraethyl titanate, castor oil mass ratio be 1-2:1-2:0.01:0.1-0.2.
CN201910098383.3A 2019-01-31 2019-01-31 A kind of preparation of modified oxidized magnesium and its application in L-Ascorbic Acid L-O-Phosphate Pending CN109651438A (en)

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