CN101864190B - Method for preparing caramel colorant by using multistage membrane separation - Google Patents
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Abstract
The invention discloses a method for preparing a caramel colorant by using multistage membrane separation. The method comprises the following steps of: mixing sugar sources and amino acid or ammonium salt, heating the mixture in solution or suspension state to the temperature of between 110 and 150 DEG C, and holding the temperature; passing an obtained reaction liquid through a membrane A under the pressure of between 0 and 5 bar and at the temperature of between 4 and 60 DEG C, and collecting an entrapped component and filtrate; homogenizing the entrapped component by using a colloid mill, an ultra-high pressure microfluidizer or an ultra-high pressure homogenizer, passing the homogenized component through the membrane A again for filtration, and collecting a filtered component; merging the filtrate, passing the filtrate through one or more of membranes B, C and D step by step under the pressure of between 0 and 5 bar and at the temperature of between 4 and 60 DEG C, and collecting an entrapped component and a filtered component; and concentrating or drying the entrapped component to prepare a caramel colorant product. Through the selection of multistage membranes, the aim of preparing the caramel colorant which meets the requirements of different color ratios, red indexes and yellow indexes, and improves food quality and safety is fulfilled.
Description
Technical field
The present invention relates to the caramel colorant in the green manufacture field of food, the multistage membrane separation process of particularly a kind of usefulness prepares the method for high-quality caramel colorant.The caramel colorant product of preparation can satisfy not homochromy rate, Red Index, yellowness index requirement, quality height and edible safety.
Background technology
Caramel colorant (Caramel color) is commonly called as dark reddish brown; Be human one of the food dye with the longest history that uses; Also be maximum, the most popular a kind of pigment of consumption in the foodstuff additive that use of present people, it is widely used in soy sauce, vinegar, cooking wine, sauce halogen, pickles goods, bakers' product, candy, medicine, beverage etc.Caramel colorant is a polycompound; Its physical behavior is liquid, bulk, the Powdered or pasty state of Vandyke brown to black; It is to be main raw material with fine sucrose, glucose or other Dian Fentangs, the natural pigment that adopts special formula and Technology to be processed into.Because caramel colorant belongs to foodstuff additive, the raw material and the Technology of therefore producing caramel colorant all have very strict requirement, and the U.S. has formulated special rules to producing the caramel colorant raw material, has clearly stipulated to produce the kind of caramel colorant raw material.According to the difference of in the caramelize process, using catalyzer, caramel colorant is divided into common caramel, alkaline sulfite caramel, ammonium (ammonia) method caramel and ammonium sulfite caramel four big classes.
The liquid caramel pigment is under the condition of strictness control reaction pressure, temperature, to produce, and after allotment, can produce the powder caramel colorant through spraying drying or vacuum-drying.The polymerizable molecular that contains different molecular weight in the caramel liquid, wherein high molecular polymer is the colour solid that is of caramel, but molecular weight is greater than 300, and the polymer substance of 000Da is prone to gluing deposition, influences the caramel colorant quality; Small-molecule substance colour generation ability is low, and contains noxiouss such as 5 hydroxymethyl furfural.Therefore, remove these materials the product quality of improving caramel colorant is had high theory and actual application value.Chinese invention patent CN1594442 has announced with cereal such as corn, yams to be the method for feedstock production caramel colorant, and this method is added ammoniacal liquor in hydrolyzed cereal liquid such as corn, under 95～120 ℃ of conditions, reacts 2～4 hours preparation caramel colorants.Chinese invention patent CN1450122 has announced that amino acid and glucose Maillard reaction generate a type melanic method, and this method heating glucose and amino acid mixing solution react 2～3 hours preparation type melanochrome under 120～150 ℃ of conditions.Aforesaid method serves as the main index of investigating with the look rate all, has ignored the important factors such as Red Index, yellowness index of caramel colorant, simultaneously to the potential hazard material (like 5 hydroxymethyl furfural) of the food safety that might exert an influence report not.
Membrane sepn is to occur in 20 beginnings of the century, a separation technology that emerges rapidly after the sixties in 20th century.Membrane sepn is to utilize the selective separation of film to realize separation, purifying, the spissated process of the different components of feed liquid.It is that with the different of traditional filtering film can separate in molecular range, and this process is a kind of physical process, the variation of phase need not take place and add auxiliary agent.Ultrafiltration is a kind of pressurization membrane separation technique, promptly under certain pressure, makes small molecules solute and solvent pass the special film of certain pore size, and the macromole solute can not be seen through, and stays one side of film, thereby makes macromolecular substance obtain the purifying of part.Because it has separations, concentrated, purifying and purified function concurrently; Efficient, energy-saving and environmental protection are arranged again, molecular level separates and process is simple, be easy to characteristic such as control; Therefore; Be widely used in food, medicine, biology, environmental protection, chemical industry, metallurgy, the energy, oil, water treatment, electronics, field such as bionical at present, produced huge economic benefit and social benefit.Chinese invention patent CN1510087 has announced the method for from molasses alcohol waste liquid, extracting caramel colorant, and this method is raw material with the molasses alcohol waste liquid, adopts the filter membrane in differing materials and aperture to extract the caramel colorant in the raw material.This method only adopts step membrane sepn operation, does not remove the small molecules objectionable impuritiess such as 5 hydroxymethyl furfural in the caramel colorant product.
Summary of the invention
The objective of the invention is to utilize multistage membrane separation technique to prepare caramel colorant, thereby effectively improve product quality and edible safety.
The present invention is a raw material with the caramel colorant of carbonyl ammonia (ammonium) prepared in reaction; Adopt multistage membrane separation technique; To be separated through multiple filter membrane under certain condition with the product that reducing sugar carries out Maillard reaction by ammonium salt or amino acid, trapped substance is the liquid caramel pigment in the middle of per two kinds of films.The present invention removes harmful small molecules such as macromole and 5 hydroxymethyl furfural gluing in the caramel colorant, flocculation simultaneously with the different film of multiple molecular weight cut-off; Adopt colloidal mill or super-voltage micro jet machine or clarifixator that polymer pigment material is carried out homogeneous simultaneously; Component behind the homogeneous is continued to improve the product yield through membrane sepn at different levels.
The objective of the invention is to realize through following technical proposals:
A kind of method of preparing caramel colorant by using multistage membrane separation comprises the steps:
(1) sugared source is mixed with amino acid or ammonium salt, be heated to 110～150 ℃, insulation 60～150min at solution or suspension liquid state; The consumption of amino acid or ammonium salt is 2.0%～10.0% of a sugared source quality; Said sugared source is the glucide that contains the reducing sugar of a semi-acetal hydroxyl at least or be decomposed into reducing sugar; Said ammonium salt is ammonium sulphite, volatile salt, ammonium acetate, ammonium sulfate or ammonium chloride; Said amino acid is glycocoll, leucine, tryptophane, Methionin or L-glutamic acid;
(2) with gained reaction solution in the step (1) 0bar～50bar pressure, 4 ℃～60 ℃ down through film A, collect and hold back component and filtered solution;
(3) component of holding back in the step (2) is carried out homogeneous through colloidal mill, super-voltage micro jet machine or clarifixator under 10bar～5000bar pressure, 25 ℃～80 ℃, the component behind the homogeneous is filtered through film A again, collects and filters component;
(4) step (3) and (2) gained filtered solution are merged, under 0bar～50bar pressure, 4 ℃～60 ℃,, collect and hold back component and filter component progressively through among film B, C, the D one or more;
(5) with step (4) gained hold back component through concentrating or dry, promptly be prepared into the caramel colorant product;
Said film A, B, C, D are flat sheet membrane, tubular membrane, capillary membranes or hollow-fibre membrane; Wherein, film A molecular weight cut-off is 4400000Da; Film B molecular weight cut-off size: 100000Da～300000Da; Film C molecular weight cut-off size: 10000Da～100000Da; Film D molecular weight cut-off size: 1000Da～10000Da.
For further realizing the object of the invention, said preferred glucose of reducing sugar or the fructose that contains a semi-acetal hydroxyl at least.
Said glucide preferred starch or the sucrose that is decomposed into reducing sugar.
Said simmer down to freeze concentration or concentrating under reduced pressure.
Said drying is lyophilize or spraying drying.
Compared with prior art, the present invention has the following advantages:
(1) adopt multistage membrane separation technique to prepare caramel colorant, that film A can hold back is gluing, the polymer substance of flocculation, and gained liquid product turbidity is low, has solved caramel colorant problem of unstable in food effectively, improves the mouthfeel and the quality of product.Film B, C, D can the filtering 5 hydroxymethyl furfural etc. harmful small molecules, obviously improved the edible safety of product;
(2) through homogeneous technology polymer pigment material is carried out homogeneous, the component behind the homogeneous is continued to have improved the product yield through promptly becoming the caramel colorant product behind the membrane sepn at different levels.
(3) contain in the part that film B or C or D leach unreacted completely the synthetic precursor of small molecular sugar, amino acid, pigment etc. can be used as raw material and continue reaction, avoided the waste of raw material, practiced thrift cost;
(4) adopt multistage film to handle, can select the caramel colorant product of optimum film classification with preparation not homochromy rate, Red Index and yellowness index for use according to the actual production demand, the mode of production is convenient more flexibly;
(5) membrane sepn with concentrate and can carry out simultaneously, shortens follow-up concentrating or time that drying is required, simultaneously, the water of productive use reusable edible can reach the purpose of energy-saving and emission-reduction;
(6) technical process of the present invention is simple, and major equipment is a membrane separation unit, and working parameter is easy to control, can full-automaticly produce, and significantly improves efficient, shortens the construction cycle;
(7) no longer add any chemical reagent in the multistage membrane sepn process, can not introduce new pollution, because the pre-treatment and the regenerative process of film are simple, can not produce great amount of wastewater simultaneously, can effectively reduce, belong to green processing environmental disruption.
Description of drawings
Fig. 1 is the 5 hydroxymethyl furfural reference liquid HPLC result curve figure of 0.20mg/ml for concentration.
Fig. 2 is embodiment 1 products obtained therefrom J
DHPLC result curve figure.
Fig. 3 is embodiment 2 products obtained therefrom J
BHPLC result curve figure.
Fig. 4 is embodiment 2 products obtained therefrom J
DHPLC result curve figure.
Fig. 5 is embodiment 3 products obtained therefrom J
BHPLC result curve figure.
Fig. 6 is embodiment 3 products obtained therefrom J
CHPLC result curve figure.
Fig. 7 is embodiment 3 products obtained therefrom J
DHPLC result curve figure.
Fig. 8 is embodiment 4 products obtained therefrom J
CHPLC result curve figure.
Embodiment
Below in conjunction with embodiment the present invention is done to further describe, need to prove that embodiment does not constitute the restriction that the present invention is required protection domain.
Embodiment 1:
Get 9kg SANMALT-S, be hybridly prepared into maltose solution with the 15L pure water, in the Fructus Hordei Germinatus liquid glucose, add glycocoll, consumption is 10.0% of a SANMALT-S quality, obtains mixed reaction solution.This mixing solutions is placed autoclave, and sealing adds thermal material, opens magnetic stirring apparatus simultaneously, and it is 130 ℃ that temperature of reaction is set, soaking time 80min.After reaction is accomplished, with carrying out membrane sepn after the cooling of gained liquid material.The membrane sepn step is following: earlier reaction solution is separated through film A, collect and hold back component and filtered solution a1, will hold back component and carry out homogeneous through colloidal mill, homogenization pressure 10bar, 50 ℃ of homogenous mass temperature; Component behind the homogeneous is separated through film A again.Film A is the flat sheet membrane of 4400000Da for the molecular weight cut-off that the new Asia, Shanghai City purifies the production of device factory.Collect filtered solution a
2, with filtered solution a
1And a
2Merge, carry out film D and separate, film D is that the molecular weight cut-off that Xiamen Starmem Film Technology Co., Ltd. produces is the flat sheet membrane of 10000Da, collects and holds back component.Wherein, the pressure of film A, D tolerance is 50bar; Film A, D working temperature are 30 ℃.Getting film D holds back component and after oven for drying, promptly gets solid caramel pigment product J
D
With gained caramel colorant product J
DBe mixed with the 1g/L aqueous solution, measure its look rate, Red Index, yellowness index, and carry out HPLC and detect chromatographic condition: (1) moving phase: methyl alcohol: water=1: 99～99: 1 (constant gradient wash-out); (2) flow velocity: 0.5mL/min; (3) separator column temperature: 25 ℃; (4) detect wavelength: 284nm; (5) working time: 70min.The result shows, gained caramel colorant product J
DThe look rate is 1.8 ten thousand EBC units, and Red Index is 8, and yellowness index is 12, it is dissolved in the water solution clear.The HPLC detected result is seen Fig. 2.Can find out product J shown in Figure 2 through the HPLC of 5 hydroxymethyl furfural reference liquid shown in the comparison diagram 1 curve
DHPLC as a result among the figure RT be the chromatographic peak that 5 hydroxymethyl furfural does not appear in the 32min place, think the test sample product J
DIn do not contain 5 hydroxymethyl furfural basically.
Embodiment 2:
Get 16kg sucrose, be hybridly prepared into solution with the 20L pure water, in sucrose liquid, add L-glutamic acid, consumption is 2.0% of a sucrose quality, obtains mixed reaction solution.Place heat collecting type thermostatically heating magnetic stirring apparatus to carry out the oil bath heating this mixing solutions, it is 140 ℃ that temperature of reaction is set, soaking time 70min.After reaction is accomplished, carry out membrane sepn after the cooling of gained liquid material.The membrane sepn condition is following: carry out film A earlier and separate, collect and hold back component and filtered solution a1, will hold back component through super-voltage micro jet machine homogeneous, homogenization pressure 5000bar; 25 ℃ of homogenous mass temperature.Component behind the homogeneous is separated through film A again.Film A is that the molecular weight cut-off that Xiamen Starmem Film Technology Co., Ltd. produces is the flat sheet membrane of 4400000Da.Collect filtered solution a2, filtered solution a1 and a2 are merged, carry out film B and separate, film B is that the molecular weight cut-off that Xiamen Starmem Film Technology Co., Ltd. produces is the flat sheet membrane of 300000Da, collects and holds back component and filter components b.To filter components b and carry out film D separation, film D is that the molecular weight cut-off that north, Tianjin film engineering difficult to understand ltd produces is the hollow-fibre membrane of 5000Da, collects and holds back component.Wherein, film A proof pressure is 25bar, and film B, D proof pressure are 10bar; Film A, B, D working temperature are 60 ℃.Get film B respectively, D holds back component, promptly gets solid caramel pigment product J after spray-dried
B, J
D
With gained caramel colorant product J
B, J
DBe configured to the 1g/L aqueous solution respectively, measure its look rate, Red Index, yellowness index, and carry out HPLC and detect chromatographic condition: (1) moving phase: methyl alcohol: water=1: 99～99: 1 (constant gradient wash-out); (2) flow velocity: 0.5mL/min; (3) separator column temperature: 25 ℃; (4) detect wavelength: 284nm; (5) working time: 70min.The result shows, the caramel colorant product J
BThe look rate is 2.3 ten thousand EBC, and Red Index is 6, and yellowness index is 7; Product J
DThe look rate is 1.1 ten thousand EBC, and Red Index is 7, and yellowness index is 9.Each product is dissolved in the water solution clear.Each product is seen Fig. 3,4 through the HPLC detected result.Can find out Fig. 3, product J shown in 4 through the HPLC of 5 hydroxymethyl furfural reference liquid shown in the comparison diagram 1 curve
BAnd J
DHPLC as a result among the figure RT be the chromatographic peak that 5 hydroxymethyl furfural does not appear in the 32min place, think the test sample product J
BAnd product J
DIn do not contain 5 hydroxymethyl furfural basically.
Embodiment 3:
Get 10kg glucose, be hybridly prepared into glucose solution with the 10L pure water, in liquid glucose, add ammonium sulphite, consumption is 6.0% of a glucose quality, obtains mixed reaction solution.This mixing solutions is placed autoclave, sealing, reacting by heating, it is 150 ℃ that temperature of reaction is set, soaking time 60min.After reaction is accomplished, with carrying out membrane sepn after the liquid material cooling.The membrane sepn step is following: carry out film A earlier and separate, collect and hold back component and filtered solution a1, will hold back component and carry out homogeneous through the super-voltage micro jet machine, homogenization pressure 2500bar; 80 ℃ of homogenous mass temperature; Component behind the homogeneous is separated through film A again, and film A is the flat sheet membrane of 4400000Da for the molecular weight cut-off that the new Asia, Shanghai City purifies the production of device factory.Collect filtered solution a2, filtered solution a1 and a2 are merged, carry out film B and separate, film B is that the molecular weight cut-off that Xiamen Starmem Film Technology Co., Ltd. produces is the flat sheet membrane of 100000Da.Collection is held back component and is filtered components b, will filter components b and carry out film C separation, and film C is that the molecular weight cut-off that Xiamen Starmem Film Technology Co., Ltd. produces is the flat sheet membrane of 10000Da.Collection is held back component and is filtered amount of component b, will filter amount of component b and carry out film D separation, and film D is that the molecular weight cut-off that Nanjing Kaimi Science and Technology Co., Ltd. produces is the tubular membrane of 1000Da.Wherein, the pressure of film A, B tolerance is 15bar; The pressure of film C, D tolerance is 0bar; 40 ℃ of film A, B working temperatures; 15 ℃ of film C, D working temperatures.Getting film B, C, D holds back component and promptly gets solid caramel pigment product J through lyophilize
B, J
C, J
D
With gained caramel colorant product J
B, J
C, J
DRespectively be mixed with the 1g/L aqueous solution, measure its look rate, Red Index, yellowness index, and carry out HPLC and detect chromatographic condition: (1) moving phase: methyl alcohol: water=1: 99～99: 1 (constant gradient wash-out); (2) flow velocity: 0.5mL/min; (3) separator column temperature: 25 ℃; (4) detect wavelength: 284nm; (5) working time: 70min.The result shows, gained caramel colorant product J
BThe look rate is 50,000 EBC, and Red Index is 5, and yellowness index is 7, product J
CThe look rate is 20,000 EBC, and Red Index is 7, and yellowness index is 9; Product J
DThe look rate is 10,000 EBC units, and Red Index is 8, and yellowness index is 10.Each product is dissolved in the water, the solution clear.Product J
B, J
CAnd J
DThe HPLC detected result see Fig. 5,6,7.Can find out Fig. 5,6, product J shown in 7 through the HPLC of 5 hydroxymethyl furfural reference liquid shown in the comparison diagram 1 curve
B, J
CAnd J
DHPLC as a result among the figure RT be the chromatographic peak that 5 hydroxymethyl furfural does not appear in the 32min place, think testing product J
B, J
CAnd J
DIn do not contain 5 hydroxymethyl furfural basically.
Embodiment 4:
Get the 20kg W-Gum, be hybridly prepared into suspension liquid with the 25L pure water, in suspension liquid, add ammonium chloride, consumption is 8.0% of a starch quality, obtains mixed reaction solution.Place heat collecting type thermostatically heating magnetic stirring apparatus to carry out the oil bath heating this mixed solution, it is 115 ℃ that temperature of reaction is set, and soaking time 150min after reaction is accomplished, carries out membrane sepn after the cooling of gained liquid material.The membrane sepn step is following: earlier reaction solution is separated through film A, collect and hold back component and filtered solution a1, will hold back component and carry out homogeneous through clarifixator, homogenization pressure 500bar, 40 ℃ of homogenous mass temperature; Component behind the homogeneous is separated through film A again, and film A is that the molecular weight cut-off that Xiamen Starmem Film Technology Co., Ltd. produces is the flat sheet membrane of 4400000Da.Collect filtered solution a2, filtered solution a1 and a2 are merged, carry out film C and separate, film C is that the molecular weight cut-off that north, Tianjin film engineering difficult to understand ltd produces is the hollow-fibre membrane of 50000Da, collects and holds back component.Wherein, the pressure of film A, C tolerance is 30bar; Film A, C working temperature are 4 ℃.Getting film C holds back component and after lyophilize, promptly gets solid caramel pigment product J
C
With gained caramel colorant product J
CBe mixed with the 1g/L aqueous solution, measure its look rate, Red Index, yellowness index, and carry out HPLC and detect chromatographic condition: (1) moving phase: methyl alcohol: water=1: 99～99: 1 (constant gradient wash-out); (2) flow velocity: 0.5mL/min; (3) separator column temperature: 25 ℃; (4) detect wavelength: 284nm; (5) working time: 70min.The result shows, gained caramel colorant product J
CThe look rate is 1.2 ten thousand EBC units, and Red Index is 7, and yellowness index is 10, it is dissolved in the water solution clear.Product J
CThe HPLC detected result see Fig. 8.Can find out product J shown in Figure 8 through the HPLC of 5 hydroxymethyl furfural reference liquid shown in the comparison diagram 1 curve
CHPLC as a result among the figure RT be the chromatographic peak that 5 hydroxymethyl furfural does not appear in the 32min place, think test sample J
CIn do not contain 5 hydroxymethyl furfural basically.
In sum, it is simple that the multistage membrane separation technique of a kind of usefulness prepares the required equipment of the method for high-quality caramel colorant, can satisfy the actual production demand of the caramel colorant product of not homochromy rate, Red Index and yellowness index; Poisonous in the reacted product, objectionable impurities can be removed through membrane sepn; Reach spissated effect simultaneously, unreacted pigment precursor compound completely can reuse, and has realized preparation, separation, concentration integrated; Greatly improve production efficiency, practiced thrift cost; The quality of the caramel colorant product of gained is high, edible safety is good.Therefore should technology be fit to be applied to large-scale industrial production.
Claims (5)
1. the method for a preparing caramel colorant by using multistage membrane separation is characterized in that comprising the steps:
(1) sugared source is mixed with amino acid or ammonium salt, be heated to 110～150 ℃, insulation 60～150min at solution or suspension liquid state; The consumption of amino acid or ammonium salt is 2.0%～10.0% of a sugared source quality; Said sugared source is the glucide that contains the reducing sugar of a semi-acetal hydroxyl at least or be decomposed into reducing sugar; Said ammonium salt is ammonium sulphite, volatile salt, ammonium acetate, ammonium sulfate or ammonium chloride; Said amino acid is glycocoll, leucine, tryptophane, Methionin or L-glutamic acid;
(2) with gained reaction solution in the step (1) 0bar～50bar pressure, 4 ℃～60 ℃ down through film A, collect and hold back component and filtered solution;
(3) component of holding back in the step (2) is carried out homogeneous through colloidal mill, super-voltage micro jet machine or clarifixator under 10bar～5000bar pressure, 25 ℃～80 ℃, the component behind the homogeneous is filtered through film A again, collects and filters component;
(4) step (3) and (2) gained filtered solution are merged, under 0bar～50bar pressure, 4 ℃～60 ℃,, collect and hold back component and filter component progressively through among film B, C, the D one or more;
(5) with step (4) gained hold back component through concentrating or dry, promptly be prepared into the caramel colorant product;
Said film A, B, C, D are flat sheet membrane, tubular membrane, capillary membranes or hollow-fibre membrane; Wherein, film A molecular weight cut-off is 4400000Da; Film B molecular weight cut-off size: 100000Da～300000Da; Film C molecular weight cut-off size: 10000Da～100000Da; Film D molecular weight cut-off size: 1000Da～10000Da.
2. the method for a kind of preparing caramel colorant by using multistage membrane separation according to claim 1, it is characterized in that: the said reducing sugar that contains a semi-acetal hydroxyl at least is glucose or fructose.
3. the method for a kind of preparing caramel colorant by using multistage membrane separation according to claim 1, it is characterized in that: the said glucide that is decomposed into reducing sugar is starch or sucrose.
4. the method for a kind of preparing caramel colorant by using multistage membrane separation according to claim 1 is characterized in that: said simmer down to freeze concentration or concentrating under reduced pressure.
5. the method for a kind of preparing caramel colorant by using multistage membrane separation according to claim 1, it is characterized in that: said drying is lyophilize or spraying drying.
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| CN102489155B (en) * | 2011-11-15 | 2014-02-26 | 广西大学 | Method for parallel production of nutrient sugar, flavor cane juice and feedstuff by multistage membranes |
| CN102634228B (en) * | 2012-04-05 | 2013-06-05 | 千禾味业食品股份有限公司 | Method for producing high color ratio double-strength caramel using cane molasses |
| CN102993767B (en) * | 2012-12-13 | 2015-05-20 | 广州双桥股份有限公司 | Process for continuous preparation of caramel pigment by ammonium sulfite method |
| CN103333518A (en) * | 2013-06-05 | 2013-10-02 | 华南理工大学 | Method for preparing sugarcane-fragrant pigment by utilizing molasses |
| CN104650611A (en) * | 2013-11-21 | 2015-05-27 | 张名静 | Extraction method of caramel yellow pigment |
| CN108471769B (en) * | 2015-11-10 | 2022-02-11 | 科汉森天然色素有限责任公司 | Caramel-derived color with enhanced brightness |
| CN105368090B (en) * | 2015-11-21 | 2017-07-04 | 浙江大学 | Reduce the preparation method of the caramel colorant of 4 methylimidazole contents |
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| CN106590022A (en) * | 2016-11-04 | 2017-04-26 | 陕西科技大学 | Method for preparing multipurpose caramel pigments by using ultrafiltration technology |
| CN107459836A (en) * | 2017-08-02 | 2017-12-12 | 刘启华 | A kind of preparation method of Momordica grosvenori caramel colorant |
| CN108928943B (en) * | 2018-07-09 | 2021-08-20 | 格翎（上海）环境科技有限公司 | Method for treating alcohol waste liquid discharged from molasses alcohol factory |
| CN110480521A (en) * | 2019-09-18 | 2019-11-22 | 河南理工大学 | It is a kind of glue abrasive material gas fluidic device and generate jet stream method |
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| US5114492A (en) * | 1990-08-24 | 1992-05-19 | Pepsico Inc. | Process for separating caramel colors |
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| CN1510087A (en) * | 2002-12-24 | 2004-07-07 | 桂林矿产地质研究院 | Extraction of caramel pigment from waste liquid of molasses alcohol production |
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| US5114492A (en) * | 1990-08-24 | 1992-05-19 | Pepsico Inc. | Process for separating caramel colors |
| CN1510087A (en) * | 2002-12-24 | 2004-07-07 | 桂林矿产地质研究院 | Extraction of caramel pigment from waste liquid of molasses alcohol production |
| CN1450122A (en) * | 2003-04-18 | 2003-10-22 | 湖北大学 | Process for producing pheomelanine by Maillard reaction of amino-acid with glucose |
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