CN1965091A - Sugar cane juice clarification process - Google Patents
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- CN1965091A CN1965091A CNA2005800079262A CN200580007926A CN1965091A CN 1965091 A CN1965091 A CN 1965091A CN A2005800079262 A CNA2005800079262 A CN A2005800079262A CN 200580007926 A CN200580007926 A CN 200580007926A CN 1965091 A CN1965091 A CN 1965091A
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Abstract
A process to clarify raw sugar cane juice, which comprises adding a source of lime, adding an anionic inorganic colloid or polyacyrlamide, and carbonating.
Description
Invention field
The present invention relates to improved thick sugar cane juice clarification process, described method is used anionic inorganic colloid or polyacrylamide polymers, particularly uses with the carbonation method.
Background of invention
Sugar cane juice is extremely complicated liquid medium, but contains the organic and inorganic components of many solvable, suspension/decants and suspension/colloidal form.The sucrose of people's consumption is produced with extracting method clarification sugar cane juice, and the sugar cane juice after the clarification is through processing and the concentrated sucrose that promptly gets.
Therefore, clarification is the steps necessary that obtains high yield and high quality sucrose.Clarifying process need be removed the composition beyond the sucrose, makes sucrose loss and color form minimum simultaneously.
Sulfitation process is the most widely used cane juice clarification method at present.It comprises that sugarcane juice absorbs SO
2(sulfurous gas) makes its original pH reduce to level between the 3.7-4.2.The purposes of sulfitation process comprises: (a) suppress to cause the reaction of color formation; (b) suspensoid that condenses; (c) form CaSO
3(calcium sulfite) precipitation.In addition, it also reduces the viscosity of sugarcane juice, thereby reduces the viscosity of syrup, massecuite and molasses, helps the roasting operation of evaporation and training.
But, sulfitation process exists some problems to remain the industry of sugar/alcohol to solve, and comprises (a) because the low sucrose inversion that causes of pH in the technological process; (b) any SO
2/ SO
3Regional latency environment and external corrosion problem that discharging causes; (c) crust of evaporation equipment and corrosion; (d) there is sulphite in the sucrose finished product.
Another kind of sugar cane juice clarification process is a carbonation, and it takes to add carbonic acid gas (CO with lime treatment and control usually
2) means.But this method causes (a) because this method is used high alkalinity pH (pH reaches about 10 usually) and high temperature, causes Nulomoline in the sugarcane juice (fructose and glucose) loss to increase, and influences the productive rate that produces alcohol from final molasses unfriendly; (b) filter out the throw out difficulty from settler, the facility investment and the running cost of requirement are higher, and operation is comparatively complicated.
Therefore, need be both superior than sulfitation process, avoid the defecation method of the existing problem of carbonation again.The invention provides this method.
The silicate microgel is applied in desalt and the mobile method of water.WO99/61377 discloses the method that clarification contains the current of the biological solid substance (biosolids) that produces because of processed food and organic residue, described method comprises with anionic colloid (can be the silicate microgel) and contacts current with organic polymer, so that the flocculation of biological solid substance.
For sugar cane juice clarification, need reduce silicon-dioxide (silica) gathering in sugarcane juice and production heating installation as far as possible.Method of the present invention has solved this problem, and avoiding prior art simultaneously is sulfitation process and the existing problem of carbonation method.
Summary of the invention
The sugar cane juice clarification process that the present invention relates to comprises following steps at least: add lime; Add anionic inorganic colloid, polyacrylamide polymers or described colloid and described polymkeric substance; And carbonation.
In particular, the present invention relates to improving one's methods of carbonation method clarification sugar cane juice, described method comprises according to following steps adding anionic inorganic colloid or polyacrylamide polymers:
A) clarifying thick sugar cane juice is treated in heating;
B) add the lime source;
C) add anionic inorganic colloid, adding polyacrylamide polymers, adding successively
Described colloid and described polymkeric substance or add described colloid and described mixture of polymers;
D) charge into carbonic acid gas and carry out carbonation;
E) decant goes out formed throw out, obtains containing the supernatant liquor of sugar cane juice.
The adding of step c) operation can choose wantonly the step d) carbonation after rather than before, i.e. adding operates in the downstream of carbonation step.
Described method is optional further to be comprised:
A) supernatant liquor of gained heating above-mentioned steps e);
B) charge into carbonic acid gas and carry out carbonation;
C) decant goes out formed any throw out, obtains the supernatant liquor that another contains sugar cane juice.
Detailed Description Of The Invention
According to a specific embodiments of the present invention, defecation method of the present invention may further comprise the steps:
A) clarifying thick sugar cane juice is treated in heating;
B) add the lime source;
C) add anionic inorganic colloid, adding polyacrylamide polymers, adding successively
Described colloid and described polymkeric substance or add described colloid and described mixture of polymers;
D) charge into carbonic acid gas and carry out carbonation;
E) decant goes out formed throw out, obtains containing the supernatant liquor of sugar cane juice.
Specifically, the invention provides and use carbonation to clarify improving one's methods of thick sugar cane juice, wherein said improvement comprises and adds anionic inorganic colloid, adds polyacrylamide polymers, adds described colloid and described polymkeric substance successively or add described colloid and described mixture of polymers.The preferred anionic surfactants mineral colloid is the silicate microgel.
In step a), thick sugar cane juice is heated to about 45 ℃ to about 90 ℃, and preferred about 50 ℃ to about 85 ℃, even 55 ℃ of about 80 ℃ temperature extremely more preferably from about.The purpose of sugarcane juice heating is by quickening chemical reaction and improving colloid and the condensing and deposit and help downstream process of other non-glucides.
Adding the lime step b) is that lime (CaO) source is joined in the thick sugarcane juice.Can adopt any suitable lime source, but preferred milk of lime (Ca (OH)
2) or antacidine.The adding in lime source has improved the pH of sugar cane juice.Its peak concentration of the lime that is added accounts for about 2% weight of sugarcane juice solid content.The purpose that adds lime is to remove the sugarcane juice coloring matter, in and organic acid and form calcium phosphate precipitation, calcium phosphate precipitation can be taken away the impurity that exists in the liquid thereupon when deposition.
At step b) and c) between, choose wantonly and carry out about 0.5, this particularly advantageous to about 10 minutes timed interval.
In the step c) of the inventive method, added anionic inorganic colloid.This colloid that can be used for the inventive method comprises anionic inorganic colloid based on silicon-dioxide and composition thereof.Include but not limited to colloidal silica, polysilicate microgels, poly-aluminosilicate microgel, poly-silicic acid and the poly-silicic acid microgel and their mixture of colloidal silica, aluminium modification based on the anionic inorganic colloid of silicon-dioxide.For aluminiferous colloid, aluminium can be on the surface of colloidal solid and/or is inner.
Be used for the form that anionic inorganic colloid of the present invention can be colloidal silica, its S value＞70% usually＞75%, contains the SiO of the 2-60% weight of having an appointment
2, the SiO of preferably about 4-30% weight
2Colloid can have the particle that the surface is coated with one deck pure aluminium silicate at least, and perhaps colloid can be the silicon sol of aluminium modification.The aluminium content of surface modification silicon sol can be in the scope of 2-25%.Its specific surface area of colloidal silica particle is generally 50-1200m in the colloidal sol
2/ g, more preferably from about 200-1000m
2/ g.The silicon sol available bases is stable, used SiO
2: M
2The O mol ratio is 10: 1-300: 1, preferred 15: 1-100: 1, most preferably 6: 1-12: 1 (M is Na, K, Li or NH
4).
The silicate microgel is preferred in the inventive method.The difference of microgel and colloidal silica is that the surface-area of micro-gel particles is generally 1000m
2/ g or higher, microgel is made of young waiter in a wineshop or an inn's silicon oxide particle of the diameter 1-2nm of serial connection chaining and three dimensional network structure.Polysilicate microgels also claims active silica, its SiO
2: Na
2The O ratio is 4: 1 to about 25: 1, and the 174-176 page or leaf and the 225-234 page or leaf of " TheChemistry of Silica " (Ralph K.Iler work, John Wiley and Sons, N.Y., 1979 publication) are discussed it.Poly-silicic acid is often referred under pH1-4 and forms and partially polymerized silicic acid, comprises diameter usually less than the silica dioxide granule of 4um, and these particles are polymerization chaining and three dimensional network structure subsequently.Poly-silicic acid can be by United States Patent (USP) the 5th, 127, and No. 994 and the 5th, 626, No. 721 disclosed method preparations.Poly-aluminosilicate is in the particle, on the particle surface or the two has mixed the polysilicate or the poly-silicic acid microgel of aluminium.Polysilicate microgels, poly-aluminosilicate microgel and poly-silicic acid can prepare and keep stable under acid pH.The microgel size can increase by any known method, and for example microgel wears out, changes pH, changes concentration or well known to a person skilled in the art additive method.Using to the inventive method of silicate microgel provides minimizing equipment incrustation, thereby reduces the benefit of maintenance of the equipment cleaning problems.
Be used for polysilicate microgels of the present invention and poly-aluminosilicate microgel normally at United States Patent (USP) the 4th, 954, No. 220 and the 4th, 927, activate alkalimetal silicate under the condition that No. 498 are described and form.But also can adopt additive method.For example, as United States Patent (USP) the 5th, 482, No. 693 described, and poly-aluminosilicate can be by forming with the mineral acid acidifying silicate that contains dissolved aluminum salt.Of United States Patent (USP) No. 2,234,285, the alumina/silica microgel can be by forming with excessive alum acidifying silicate.
Except the silicon sol and the silicon-dioxide microgel of routine, the silicon sol described in European patent EP 491879 and the EP502089 also can be used as anionic inorganic colloid of the present invention.These silicon gels are commonly referred to low " S value " colloidal sol.EP491879 discloses the silicon sol of S value in the scope of 8-45%, and wherein the specific surface area of silica dioxide granule is 750-1000m
2/ g carried out surface modification with the 2-25% aluminum oxide.EP502089 discloses SiO
2With M
2The mol ratio of O (wherein M is alkalimetal ion and/or ammonium ion) is 6: 1-12: 1, and the specific surface area of contained silica dioxide granule is 700-1200m
2The silicon sol of/g.
Can be used for colloidal silica sol scope of the present invention and comprise " S value " low colloidal silica sol.At J.Phys.Chem., 1956, the 60 volumes define in the 955-957 page or leaf S value by Iler and Dalton.The S value is the measure unit that aggregate or microgel form degree, and the low more microgel content that shows of S value is high more, can determine the S value by the amount (by weight percentage) of measuring silicon-dioxide in the disperse phase.Disperse phase is made of anhydride silica particle and any water that is fixed on particle surface or inside.
In the method for the invention, preferred silicate microgel joins in the mixture in sugar cane juice and lime source in step c), and the preferably about 50ppm of add-on is to about 500ppm, and more preferably from about 50ppm is to about 200ppm.The silicate microgel is commercially available, as the Particlear_ that Delaware, USA Wilmington E.I.du Pont de Nemours and Company produces, and also can be by any method production well known in the art.United States Patent (USP) the 6th, 060 No. 523 and the 6th, 274, discloses improved method, can prepare microgel reliably for No. 112.The silicate microgel obtains from water glass usually.It is also called silicon-dioxide microgel or active silica, contains to have an appointment 0.5% to 2%SiO
2, particularly about 1%SiO
2Solution.
Perhaps, adopt polyacrylamide polymers in the step c) of the inventive method, consumption is extremely about 10ppm of about 1ppm, and preferably about 2ppm is to about 5ppm.The spendable suitable polyacrylamide polymers of this paper mainly comprises anionic polymer, its have with thick sugarcane juice in the identical electric charge of suspended particle.The partially hydrolyzed polyacrylamide of selective hydrolysis degree moderate (about 15% to about 40% hydrolysis).Polymericular weight is usually 1,000, more than 000.Suitable polyacrylamide is commercially available, and for example the Kemwater Brasil S.A. from St. Paul,Brazil obtains.
Can with the silicate microgel and polyacrylamide add successively by any order or add as mixture, they all are applied in the inventive method.The preferred silicate microgel that uses because it dewaters in filtration procedure comparatively fast, makes and filters better operation.
The present patent application people has developed improved sugarcane juice carbonation method, described method comprises the operational condition that adds anionic inorganic colloid (preferred silicate microgel) and adjust to the carbonation method of improvement raising, thereby solve the problem that in industrial implementation, faces, so that obtain productive rate and the higher sugar of purity.The inventive method reclaims useless CO from fermentor tank
2, and with the CO that reclaims
2The used SO of sulfitation process that replaces present rclarifying cane juice
2The inventive method is also removed the compound that forms incrustation by improved defecation method from sugarcane juice, the incrustation that reduces vaporizer and heat exchanger forms.In addition, the inventive method has solved precipitation/settling filtration problem that traditional carbonation method is produced, and can not cause the Nulomoline loss to increase simultaneously.And than traditional carbonation method, the inventive method has also reduced the consumption of CaO.
The inventive method has reduced the sucrose loss that conversion causes, and organic and inorganic impurity obtains better sugarcane juice purifying by removing more, and the corrosion that has reduced equipment is (because without SO
2), having alleviated the incrustation phenomenon of vaporizer, the result is improved sugar production process.
According to a preferred embodiment of the invention, the microgel acid activation is particularly by CO
2Activation is because have a large amount of CO in fermentation sugarcane juice and/or molasses production alcoholic acid sugarcane processing unit (plant)
2
Be favourable at interval if having time between step c) and the subsequent step, this timed interval is generally 0.5 to about 10 minutes.
In step d), add CO
2, add-on preferably is enough to form precipitation of calcium carbonate.Regulate CO
2Flow bubble and the reaction times with control.In a preferred embodiment of the invention, CO
2Add by the carbonation post, originate into adverse current with the thick sugar cane juice of lime that adds that is fed to capital.
Optional can be the carbonation step after rather than before with the mixture of the disclosed amount adding anionic inorganic colloid in front or polyacrylamide or they both or they.
After the carbonation step, carry out decant e) step.In step e), take the purifying sugar cane juice by removing the impurity that goes out as solid precipitation.The sugarcane juice that decant is gone out shifts out and delivers to the vaporizer from the top of decanting vessel and concentrates.Precipitation and its solid concentration of material that deposits are about 10 ° of B é, and common bottom from decanting vessel is discharged and delivered to filtration fraction, filters this material to reclaim sugar at filtration fraction.According to the present invention, the required decant time is less than one hour, about 30 minutes usually.After this first carbonation operation, the pH of supernatant liquor is generally between about 8 to 10, and preferred about 9.
Carbonation method of the present invention is when being raw material particularly advantageous when implementing with final supernatant liquor in second carbonation operation.Therefore, the present invention further comprises the carbonation method, and it also may further comprise the steps except above disclosed step in addition:
A) supernatant liquor of heating aforesaid method gained;
B) add carbonic acid gas and carry out carbonation;
C) any solid substance of being settled out of decant obtains the supernatant liquor that another contains sugar cane juice.
In step a), supernatant liquor heats under preferred about 70 ℃ temperature at about 60 ℃ to 90 ℃.Carry out the carbonation step after the heating.The operational condition that is adopted should avoid foam excess to form, and can produce the neutral pH of expectation to sugarcane juice.In a preferred embodiment, CO
2Add by the second carbonation post, become adverse current with the rclarifying cane juice that is fed to capital.This post is regulated the final pH that is subject to processing sugarcane juice.Described final pH is generally about 6.5 to about 8, preferred about 7.Any solid substance decant with being settled out obtains the supernatant liquor that another contains sugar cane juice.In the second carbonation process, often there is not throw out to form.
The inventive method disclosed herein utilizes carbonation to clarify sugar cane juice, and than sulfitation process, its advantage is that productive rate is higher, and quality product is better simultaneously.
It is significant advantage that sulphur is used in cancellation in the methods of the invention, and this not only is embodied on the cost, but also causes process safety to improve, and heating installation corrosion and/or incrustation reduce and environmental degradation alleviates.
Sucrose inversion reduces approximately 1.5% to 2.5% in the methods of the invention, this means that productive rate improves.The direct result of this aspect of the present invention is, and is because sucrose forms sugar crystal and do not form reducing sugar, higher with the productive rate of the crystallised sugar of same device fabrication.This standard just proves that the inventive method significantly is better than art methods.
The inventive method not only causes the sucrose loss to reduce, and can also remove non-glucide more, as starch, protein, suspension solid substance and dissolved solid.Protein and starch reduce surprising, in rclarifying cane juice usually less than 3ppm.
The product purity of the inventive method output is higher, and physical property such as color are better.The raising of purity (purity=POL/ Brix) may be because two different reasons: (i) sucrose content higher (molecule is bigger) or (ii) non-glucide content lower (denominator is littler).It is favourable that sucrose inversion more reduces further crystallization, because the impurity interference meeting that is subjected in the technological process still less.
Foreign matter content is lower to suit the requirements very much, all useful to entire operation, because this has reduced cumulative volume to be processed in the total system.Therefore, heating installation especially crust/incrustation phenomenon of occurring of vaporizer still less, these equipment clean so continually with regard to not needing so.This has reduced maintenance and steam energy cost, for the employee who carries out this clean operation at industrial site has improved safety control.
In addition, the impurity that brings of the inventive method reduces the much higher saccharic amount that also causes.The impurity of sugar and color (ICUMSA standard (420nm)) reduce is promoted its marketable value.Can obtain maximum value is 7100, and preferred maximum is 6000, and more preferably maximum value is 5000 clarification syrup amount of color.
It is safer that the inventive method is removed technological process, outside quality product is more superior, also makes the impurity in the syrup reduce about 1.5% to 2.0%.Because all above-mentioned reasons, the inventive method is improved total efficiency.The impurity of under identical installed capacity, handling still less, so candy output improves.
This raising of candy output does not influence from molasses produces alcohol.Reducing sugar is still stayed in the final degree molasses, can be converted to ethanol.Therefore,,, only need more thick sugarcane juice is turned to winery, skip over clarification, evaporation and vacuum step for keeping identical desired level although because sucrose inversion reduces, and the final waste molasses that Alcohol Production is used tails off.
Except above advantage, the inventive method also makes the minimizing of sugarcane juice turbidity, organic colloid (as starch) reduces and condense and flocculation improves.Particularly, the time that forms flakes shortens, and the size of flakes also reduces.Therefore shortened depositing time generally.Also having an advantage is can choose cancellation wantonly to add flocculation agent.
Carbonation method of the present invention is for using particularly advantageous at about 70 ℃ to about 80 ℃ temperature, thereby avoids the productive rate of producing alcohol from final waste molasses is had a negative impact.Simultaneously, cost of energy and decant time have also reduced.Keep at high temperature can causing the degraded of sucrose inversion and reducing sugar to form organic acid syrup, cause purity and pH to descend.And the shortening of the inventive method decant time can reduce the loss that causes because of the sugar conversion.
Precipitation/settling that novel method of the present invention produces has the easier filtering characteristic that is produced than traditional carbonation method, and this fact is especially favourable concerning the industry of sugar/alcohol.The settling that tradition carbonation method is produced is difficult to filter, and needs pressure filter is installed, and this means a large number of fund input and more complicated technological process.This is the one of the main reasons that existing carbonation method can not be used more widely.Precipitation/settling that the inventive method produces does not need that pressure filter is installed and filters, because can use vacuum rotary filter.
Precipitation/settling that the inventive method produces is except better filtration, and the sucrose amount that contains is also lower.Therefore the sucrose loss only accounts for half of present loss greatly less than 0.4% of the total reducing sugar that enters the workshop.In addition, with traditional carbonation method contrast, lime consumption is lower, less than 2% weight of the solid substance that exists in the sugarcane juice.In traditional carbonation method, lime consumption accounts for the 6-10% weight of the solid substance that exists in the sugarcane juice.
Therefore, the inventive method is faster safer method, can cause productive rate to significantly improve, and produces more superior quality, avoids the existing problem of conventional carbonation method simultaneously.The inventive method can be used to clarify more efficiently sugar cane juice.
The brainstrust of this area will appreciate that, according to above instruction content, might make many modifications and change to the scope of the invention.Therefore it should be understood that the present invention except being embodied by the specifically described mode of this paper, also can embody by other modes.
Embodiment
The thick sugar cane juice that the firm harvest season in the past produces has following typical characteristics: pH5.2-5.8, turbidity 5000, color 10,000-12,000 (adopting ICUMSA method #4), Brix 14-16, total reducing sugars 13-15.
Embodiment 1
Thick sugar cane juice (1 liter) slowly is heated to 80 ℃ in 2 liters of beakers, adds 33ml milk of lime (calcium hydroxide, Ca (OH) then gradually
2), make pH rise to 8.5.With about one (1) minute of gained solution left standstill, add the Particlear_ silicon-dioxide microgel 160ppm that Delaware, USA Wilmington E.I.du Pont deNemours and Company produces then.Then left standstill solution about 2 minutes.Make the pH of solution remain on 8.4 by adding milk of lime and carbon dioxide simultaneously.The milk of lime (105ml) that adds makes total CaO reach 2% weight of solid content.Carbonic acid gas is introduced with 260cc/ minute stable flow velocity.At last, by being blown into, more carbon dioxide make the pH of solution drop to 7.0 in the solution.The total carbonic acid full charge time is 15 minutes.In the carbonation process, by regulating CO
2Flow velocity and rely on the existence of microgel to come control foam to form.Depositing 45 minutes postprecipitation objects long-pending (in original carbonation beaker) is 160mL.
Carry out filtration step then, under the vacuum of 58mm Hg (7733Pa), filtered 100mL concentrating and precipitating thing.The required filtration time of 75ml sample is 6 minutes, and the filtration cakes torrefaction time needs 8 minutes.The final pH of filtrate and upper strata syrup liquid all is 7.9.PH, color, turbidity, Brix and total reducing sugars to upper strata syrup and vacuum filtration syrup are analyzed.The inventive method obviously obtains superior syrup transparency (clarity) and light transmission (transparency).The turbidity of final syrup is 16NTU, and the color that records with ICUMSA method #4 is 6436.Brix is 17.8.Total reducing sugars is 16.7.
Comparative Example A An
Handle sugar cane juice in sugar refinery with sulfitation process.Make sugar cane juice and SO
2And milk of lime (calcium hydroxide, Ca (OH)
2) contact, to form calcium sulfite (CaSO
3) precipitation.The agglomerative throw out is separated with supernatant liquor.The pH of products therefrom is 6.5, and the color that records with ICUMSA method #4 is 9030, and Brix is 15.8, and total reducing sugars is 14.6, and sulphite is 150.
Embodiment 2
Press embodiment 1 and handle thick sugar cane juice.The pH of final product is 8, and turbidity is 54NTU, and the color that records with ICUMSA method #4 is 7096, and Brix is 17.0, and total reducing sugars is 16.2.
Embodiment 3
Use method of the present invention, per hour rise thick sugar cane juice at pilot plant and move 3-4 hour every day and handle continuously with 2-3.Thick sugar cane juice is heated to 55 ℃, adds milk of lime (calcium hydroxide, Ca (OH) then
2), make pH rise to 10.5.Milk of lime consumption accounts for about 1.2% weight of solid content for CaO.Made gained solution static about five (5) minutes.In countercurrent column, make solution carry out carbonation then.Carbonic acid gas is introduced from the bottom to stablize flow velocity, so that the pH of the final carbonation sugarcane juice in post downstream is 9.5.The carbonation time of carrying out in the post is 10 minutes.Add the Particlear_ silicon-dioxide microgel 150ppm that Delaware, USA Wilmington E.I.du Pont de Nemours andCompany produces then.Then left standstill solution about 5 minutes.Then microgel-carbonation sugarcane juice is delivered in the decanting vessel, throw out is separated with rclarifying cane juice (supernatant liquor).At last, supernatant liquor is heated to 70 ℃, in the second adverse current carbonation post, makes the pH of solution drop to 7.0 in this heated solution by more titanium dioxide sugar is blown into.The throw out that decanting vessel comes out send to be identified, the result provides in following table 1 and 2.
Table 1 will compare with the average result of the inventive method by the carbonation method of reporting in the character of the syrup of embodiment 3 preparation and the document that does not adopt the silicon-dioxide microgel.
Table 1
| Character | Carbonation, document mean value | Carry out carbonation with microgel |
| pH | 8.1 | 7.2 |
| Sucrose, wt% | 13.5-14 | 14.7 |
| Color | 10900 | 4943 |
| Brix | 15.8 | 16.7 |
| POL | 12.6 | 15.1 |
| Purity (POL/ Brix) | 82.5 | 88.7 |
| Total reducing sugars | 13 | 15.8 |
| Starch | 90 | 0 |
| CaO accounts for solid substance (%Wt) | 2 | 1.2 |
Table 1 shows is having improvement with the inventive method aspect color, Brix, purity, starch and the total reducing sugars.
Table 2 will compare by the character of the syrup of embodiment 3 preparations and the average result that sugar refinery sulfitation process is reported with the inventive method.
Table 2
| Character | Sulfitation process, sugar refinery mean value | Carry out carbonation with microgel |
| pH | 7.0 | 7.2 |
| Sucrose, wt% | 13.5-14 | 14.7 |
| Color | 6000 | 4943 |
| Brix | 15,5-16 | 16.7 |
| Purity (POL/ Brix) | 82-85 | 88.7 |
| Total reducing sugars | 13-15 | 15.8 |
| Reducing sugar | 0.4-0.6 | 0.53 |
| Starch | 70-100 | 0 |
| %CaO (clarification syrup) | 0,10 | 0,11 |
Table 2 shows is having improvement with the inventive method aspect color, Brix, purity, starch, sucrose and the total reducing sugars.
Embodiment 4-12 and Comparative Example A An-F
With Bokela filtration unit (available from Bokela, Karlsruhe, Germany),, filter the embodiment 3 method gained carbonation materials of 200ml suspension volume with three kinds of different pressures shown in the table 3.Also filter the material of traditional sulfitation process gained under the same conditions.The material that obtains with the inventive method presents fibrous solid substance, forms the filter cake that contains the 16-27% solid substance, can easier and dehydration quickly.On the contrary, the resulting material of comparative sulfitation process forms the gel filter cake of solid substance about 23%, and it is more difficult to dewater.For comparative sulfitation process, the turbidity of gained syrup (filtrate) is about 11,000-12, and 000NTU, for the inventive method, for about 4,000-5,000NTU.Concrete outcome is listed in following table 3.
| Table 3 | |||||
| The sample identity | Overvoltage (Pa) | Filtrate turbidity (NTU) | Filter cake height (mm) | Total time (sec) | Filter cake solid substance (%) |
| Comparative Example A An-(sulfitation process) | 0.3×10 5 | 12252 | 15.9 | 1747.0 | 23.02 |
| Comparative Examples B-(sulfitation process) | 0.6×10 5 | 11566 | 17.1 | 1660.0 | 23.65 |
| Comparing embodiment C-(sulfitation process) | 1.2×10 5 | 12442 | 16,0 | 614,0 | 23,30 |
| Embodiment 4-(microgel) | 0.3×10 5 | 4743 | 29.5 | 113.0 | 21.54 |
| Embodiment 5-(microgel) | 0.6×10 5 | 4929 | 27.3 | 107.0 | 27.61 |
| Embodiment 6-(microgel) | 1.2×10 5 | 4981 | 29.7 | 70.0 | 16.25 |
Also carried out in addition operation several times as mentioned above, with the carbonation method of the present invention being used the silicate microgel and (a) the present invention use polyacrylamide replace the carbonation method of silicate microgel and (b) traditional prior art carbonation method compare.The result shows in following table 4.
| Table 4 | |||||
| The sample identity | Overvoltage (Pa) | Filtrate turbidity (NTU) | Filter cake height (mm) | Dewatering time (sec) | Filter cake solid substance (%) |
| Comparing embodiment D-(traditional carbonation) | 0.3×10 5 | 6342 | 10.4 | 6.3 | 22.32 |
| Comparing embodiment E-(traditional carbonation) | 0.6×10 5 | 6514 | 5.9 | 7.7 | 21.48 |
| Comparing embodiment F-(traditional carbonation) | 1.2×10 5 | 6380 | 9.0 | 4.4 | 23.13 |
| Embodiment 7-(microgel carbonation) | 0.3×10 5 | 5479 | 9.0 | 4.5 | 23.19 |
| Embodiment 8-(microgel carbonation) | 0.6×10 5 | 5474 | 8.7 | 3.3 | 23.82 |
| Embodiment 9-(microgel carbonation) | 1.2×10 5 | 5425 | 8.2 | 3.8 | 23.81 |
| Embodiment 10-(polymkeric substance carbonation) | 0.3×10 5 | 6015 | 6.5 | 7.4 | 21.81 |
| Embodiment 11-(polymkeric substance carbonation) | 0.6×10 5 | 5916 | 8.7 | 7.1 | 23.39 |
| Embodiment 12-(polymkeric substance carbonation) | 1.2×10 5 | 5900 | 8.0 | 7.7 | 24.97 |
According to above result, equally in this case, use its filter cake solid substance per-cent of material of the inventive method and being similar to of above embodiment 4-6.But, compare with sulfitation process, use the inventive method gained filtrate turbidity of silicate microgel or polyacrylamide better, the filtration of filter cake is also more or less freely.Use the inventive method dehydration of silicate microgel faster.In addition, with regard to filter operation, use the carbonation method of the present invention of silicate microgel to compare with additive method, the gained filter cake can discharge from filter screen better.
Claims (20)
1. the method for the thick sugar cane juice of clarification said method comprising the steps of: add the lime source; Add anionic inorganic colloid, polyacrylamide polymers or described colloid and described polymkeric substance; Carbonation.
2. the method for claim 1 said method comprising the steps of:
A) clarifying thick sugar cane juice is treated in heating;
B) add the lime source;
C) add anionic inorganic colloid, add polyacrylamide polymers, add described colloid and described polymkeric substance or add described colloid and described mixture of polymers successively;
D) charge into carbonic acid gas and carry out carbonation;
E) decant goes out formed throw out, obtains containing the supernatant liquor of sugar cane juice.
3. the method for claim 2, described method further comprises following replenish step:
A) heating supernatant liquor;
B) charge into carbonic acid gas and carry out carbonation;
C) decant goes out formed any throw out, obtains the supernatant liquor that another contains sugar cane juice.
4. the method for claim 2, wherein said anionic inorganic colloid is the silicate microgel.
5. the method for claim 4, wherein said silicate microgel adds after step d) rather than before the step d).
6. the method for claim 2, wherein said polyacrylamide polymers or polyacrylamide and silicate microgel add after step d) rather than before the step d).
7. the method for claim 2, wherein said thick sugar cane juice heats to about 90 ℃ temperature at about 45 ℃.
8. the method for claim 2, wherein said lime joins in the thick sugarcane juice to reach the peak concentration of 2% weight that accounts for thick sugarcane juice solid substance.
9. the method for claim 8, wherein said lime is milk of lime (Ca (OH)
2) or the form of antacidine.
10. the method for claim 4, the add-on of wherein said silicate microgel is about 50ppm about 500ppm extremely.
11. the method for claim 2, the add-on of wherein said polyacrylamide polymers are 1ppm to 10ppm.
12. the method for claim 4, wherein said adding silicate microgel were carried out after adding lime in about 0.5 to about 10 minutes.
13. the method for claim 4, wherein said carbonic acid gas add spend about 0.5 to about 10 minutes after adding the silicate microgel after again.
14. the method for claim 2, wherein said sedimentary solid concentration are about 10 ° of Baum é, and described throw out carries out decant subsequently, separate with described throw out with the sugar cane juice with purifying.
15. the method for claim 2, the wherein said decant time was less than one hour.
16. the method for claim 2, the final pH of wherein said supernatant liquor are about 6.5 to about 8.
17. the method for claim 3, wherein said supernatant liquor heats to about 90 ℃ temperature at about 60 ℃.
18. the method for claim 17, the add-on of wherein said carbonic acid gas are enough to make the pH of sugar cane juice supernatant liquor to drop to about 7.0.
19. the method for claim 3, the maximum color of wherein said supernatant liquor are 6000.
20. a sugar cane juice, described sugar cane juice is by the method production of claim 1.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US55344204P | 2004-03-16 | 2004-03-16 | |
| US60/553,442 | 2004-03-16 | ||
| US11/072,909 | 2005-03-04 |
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| Publication Number | Publication Date |
|---|---|
| CN1965091A true CN1965091A (en) | 2007-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2005800079262A Pending CN1965091A (en) | 2004-03-16 | 2005-03-15 | Sugar cane juice clarification process |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021250A (en) * | 2010-12-02 | 2011-04-20 | 杨鲁昆 | Method for producing high-quality white granulated sugar by clarifying syrup |
| CN102676703A (en) * | 2012-05-14 | 2012-09-19 | 广西华蓝设计(集团)有限公司 | Method and equipment for clarifying cane juice by combining air floatation purification and thermal floatation purification |
| CN104878128A (en) * | 2014-02-28 | 2015-09-02 | 黄海东 | Sugarcane sugar sheet and preparation method thereof |
| CN115708550A (en) * | 2022-11-17 | 2023-02-24 | 元气森林(北京)食品科技集团有限公司 | Coconut water and coconut water-containing beverage and method for producing the same |
-
2005
- 2005-03-15 CN CNA2005800079262A patent/CN1965091A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102021250A (en) * | 2010-12-02 | 2011-04-20 | 杨鲁昆 | Method for producing high-quality white granulated sugar by clarifying syrup |
| CN102021250B (en) * | 2010-12-02 | 2013-11-20 | 杨鲁昆 | Method for producing high-quality white granulated sugar by clarifying syrup |
| CN102676703A (en) * | 2012-05-14 | 2012-09-19 | 广西华蓝设计(集团)有限公司 | Method and equipment for clarifying cane juice by combining air floatation purification and thermal floatation purification |
| CN104878128A (en) * | 2014-02-28 | 2015-09-02 | 黄海东 | Sugarcane sugar sheet and preparation method thereof |
| CN115708550A (en) * | 2022-11-17 | 2023-02-24 | 元气森林(北京)食品科技集团有限公司 | Coconut water and coconut water-containing beverage and method for producing the same |
| CN115708550B (en) * | 2022-11-17 | 2024-02-06 | 元气森林(北京)食品科技集团有限公司 | Coconut water and beverage containing coconut water and preparation method thereof |
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