CN104561390A - Application of Zeta potential for clarifying sugar juice by sulfitation process - Google Patents
Application of Zeta potential for clarifying sugar juice by sulfitation process Download PDFInfo
- Publication number
- CN104561390A CN104561390A CN201410765850.0A CN201410765850A CN104561390A CN 104561390 A CN104561390 A CN 104561390A CN 201410765850 A CN201410765850 A CN 201410765850A CN 104561390 A CN104561390 A CN 104561390A
- Authority
- CN
- China
- Prior art keywords
- zeta potential
- sugar juice
- syrup
- zeta
- application
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C13—SUGAR INDUSTRY
- C13B—PRODUCTION OF SUCROSE; APPARATUS SPECIALLY ADAPTED THEREFOR
- C13B20/00—Purification of sugar juices
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention provides an application of Zeta potential for clarifying sugar juice by a sulfitation process. When the Zeta potential of the solution is lowest, the flocculation effect of the sugar juice is the best. According to the optimal process of optimizing the clarified sugar juice in the sulfitation process by virtue of three indxes such as Zeta potential, decolorization ratio and turbidity, whether the optimal flocculation conditions of the sugar juice can be reflected by the level of the Zeta potential is verified. The result proves that the Zeta potential, decolorization ratio and turbidity are taken as the indexes, and the optimized optimal flocculation conditions are basically consistent with one another. Therefore, the application has high feasibility for optimizing the sugar juice flocculation and clarification process in the sulfitation process by virtue of the Zeta potential method.
Description
Technical field
The present invention relates to the application of Zeta potential in sulfurous method clarified sugar juice.
Background technology
Flocculate and clarify is one of important operation in sugar industry.The worker that all the time refines sugar constantly is devoted to the improvement and perfection of flocculate and clarify technique and method, but is but still weak to the further investigation of its mechanism.The applicant, by the change of Zeta potential in research sulfurous method syrup flocculate and clarify process, attempts the mechanism disclosing sulfurous method syrup flocculate and clarify, for development sulfurous method syrup flocculate and clarify new method and new technology provides theoretical foundation.
Summary of the invention
In order to solve problems of the prior art, the invention provides the application of Zeta potential in sulfurous method clarified sugar juice.
The invention provides the application of Zeta potential in sulfurous method clarified sugar juice, when the Zeta potential of solution is minimum, syrup flocculating effect is best.
The present invention also provides the technique of sulfurous method clarified sugar juice, get syrup to stir, first add 3.5g/L calcium hydroxide, keep 20 min, add 40ml/L sulfurous acid solution and 1g/L lime carries out Sulphitation and Neutralization, to pH=7, reaction 25min, adds rapidly 14ml/L flocculation agent cationic polyacrylamide subsequently, slowly stirs 2 min, leave standstill 30 min, get flocculate and clarify liquid and get final product.
The present invention is respectively with the optimised process of Zeta potential, percent of decolourization, turbidity three kinds of index optimization sulfurous method clarified sugar juice, verify whether the height of Zeta potential can react the optimum flocculating condition of syrup, result shows: with Zeta potential, percent of decolourization, turbidity for index, the optimum process condition optimized is basically identical, demonstrates and has feasibility with Zeta potential method optimization sulfurous method syrup flocculate and clarify technique.
Embodiment
Following embodiment is convenient to understand the present invention better, but does not limit the present invention.Experimental technique in following embodiment, if no special instructions, is ordinary method.
embodiment 1
the preparation of 1 reagent
(1) preparation of brown sugar (Saccharum Sinensis Roxb.) retro-dissolved syrup: precise 100g brown sugar (Saccharum Sinensis Roxb.), is dissolved in 900mL distilled water, is slowly stirred to dissolves completely with magnetic stirring apparatus, the retro-dissolved syrup of obtained 10 ° of Bx, stand-by.
(2) preparation of polyacrylamide: precise 1g poly amic acid, is dissolved in distilled water, is slowly stirred to magnetic stirring apparatus and dissolves completely, and finally dilution is settled in 1000mL volumetric flask, and the polyacrylamide solution of obtained 1g/L is stand-by.
(3) preparation of sodium polyacrylate: precise 1g poly amic acid, is dissolved in distilled water, is slowly stirred to magnetic stirring apparatus and dissolves completely, and finally dilution is settled in 1000mL volumetric flask, and the sodium polyacrylate solution of obtained 1g/L is stand-by.
sulfurous method flocculate and clarify is tested
Get syrup 100mL in 250mL beaker, stir in constant temperature blender with magnetic force, first add 0.35g calcium hydroxide, keep 20 min, add 4ml sulfurous acid solution and 1g/L lime carries out Sulphitation and Neutralization, to pH=7, reaction 25min, adds rapidly 1.4ml flocculation agent cationic polyacrylamide subsequently, slow stirring 2 min, leave standstill 30 min, get flocculate and clarify liquid, measure its colour.
the mensuration of current potential
Liquid specific conductivity <50mScm to be measured is regulated with deionized water
-1, take out liquid to be measured and import in the pond of potentiometer, probe temperature is 25 DEG C, by its Zeta potential value of Zeta potential analysis-e/or determining, gets the mean value of 3 Duplicate Samples measurement results.
The applicant is studied the change of Zeta potential in flocculation process, through experiment:
(1) adding in grey process, the absolute value noticeable change of the Zeta current potential of syrup, when calcium hydroxide consumption is less than 0.35 g, the absolute value of Zeta current potential reduces rapidly with the increase of calcium hydroxide consumption; When add-on is 0.35 g, the absolute value of Zeta potential is minimum is about 4 mv; When calcium hydroxide add-on is greater than 0.35 g, the absolute value of Zeta current potential starts again to become large.This is because the Zeta current potential of syrup is negative value, and absolute value is larger, micelle surface band negative charge in syrup, along with adding of calcium hydroxide, on the one hand, calcium ion has higher positive charge and stronger complex ability, rapidly and micelle generation complexing and charge neutrality effect in syrup, the absolute value of syrup Zeta current potential is reduced rapidly; In calcium hydroxide, hydroxide ion is electronegative on the other hand, has stronger surface bonding power, causes the Zeta current potential negative value of syrup to increase, and absolute value becomes large.The former impact exceedes the latter, although the current potential of syrup is negative value, absolute value diminishes; When continuing to add calcium hydroxide, in syrup, the negative charge of particle surface is saturated with neutralization by calcium ion complexing, and now hydroxide ion acts as principal element, therefore, the absolute value of the Zeta current potential of syrup starts again to become large, and Zeta current potential moves towards negative value direction.
(2) when sulfurous acid solution add-on is less than 4 mL, the absolute value of the Zeta potential of syrup reduces rapidly; When being greater than 4 mL, the absolute value of Zeta potential becomes large; When sulfurous acid solution add-on equals 4 mL, the absolute value of Zeta potential is 3 mV, reaches minimum value.In this process, Zeta potential value is by SO
3 2-with the impact of pH value two factors, when sulfurous acid solution consumption is less than 4 mL, Zeta potential value is mainly by acidity and H
+impact, therefore, the absolute value of Zeta potential reduces with the increase of sulfurous acid solution consumption; When sulfurous acid solution consumption is greater than 4 mL, the absolute value of Zeta potential is then mainly by SO
3 2-impact, therefore, the absolute value of Zeta potential increases with the increase of sulfurous acid solution consumption.When sulfurous acid solution consumption is 4 mL, the absolute value of Zeta reaches minimum value.
(3) flocculation agent adopted in the application is polyacrylamide polymer, the functional groups such as the amino of polymeric flocculant or carboxyl adhere to different micelles by the mode such as charge neutrality, complexing, as " bridge formation ", make different micelle by macromolecular chain " connection "; Be woven into again netted between the flocculation agent macromolecular chain of adhesion micelle by Van der Waals force, in settling process, other non-sugar ingredient such as more colloid, polymer pigment in " net is caught " retro-dissolved syrup, completes flocculation finally by " volume is swept " mode.Before flocculating settling; micelle or the particulate of greater particle size is first condensed into compared with the micelle of small particle size; can condense between micelle; depend on the electric charge how much namely Zeta potential value on micelle surface; surface charge is little; namely the absolute value due to Zeta is little, and between micelle, charge repulsion is little, then easily condense.The flocculating agent molecules such as aPAM, nPAM and PAAS are electronegative, in syrup, micelle is also in negative charge, therefore, electronegative flocculating agent molecule adheres to the micelle in syrup mainly through complexing mode, complete flocculation by the mode such as " bridge formation ", " net is caught " and " volume is swept " more afterwards, realize the separation to the non-sugar ingredient such as micelle, polymer pigment in syrup.From Zeta potential value, the flocculation agents such as aPAM, nPAM and PAAS add, and make the absolute value of syrup Zeta current potential be reduced between 2.7 mv to 2.4 mv further, and owing to not there is charge neutralization, the absolute value reduction amplitude of Zeta current potential is less.CPAM flocculation agent surface band positive charge, adhere to simultaneously with micelle in syrup except there is complexing, also there is charge neutralization, therefore, the absolute value of Zeta reduces degree comparatively greatly, reaches about 1.8 mv, therefore, adopt cationic polymeric flocculant (cPAM), faster and better flocculating settling effect can be realized.
Through experiment, add in grey process, with the increase of ash load, the absolute value of syrup Zeta potential reduces rapidly; In Sulphitation and Neutralization process, with the increase of intensity of sulfitation, the absolute value of Zeta potential slowly reduces; In Sulphitation and Neutralization juice adding along with flocculation agent, the absolute value of Zeta potential continues slowly to be reduced to minimum value.Syrup is from adding ash to Sulphitation and Neutralization again to flocculating settling, and the absolute value of whole process Zeta potential is in continuous reduction, and the repulsive force between particle constantly weakens, the bad stability of dispersion system, and coagulation and flocculation phenomenon finally occur.
The present invention is respectively with the optimised process of Zeta potential, percent of decolourization, turbidity three kinds of index optimization sulfurous method clarified sugar juice, verify whether the height of Zeta potential can react the optimum flocculating condition of syrup, result shows: with Zeta potential, percent of decolourization, turbidity for index, the optimum process condition optimized is basically identical, demonstrates and has feasibility with Zeta potential method optimization sulfurous method syrup flocculate and clarify technique.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
- The application of 1.Zeta current potential in sulfurous method clarified sugar juice, is characterized in that: when the Zeta potential of solution is minimum, and syrup flocculating effect is best.
- 2. the technique of sulfurous method clarified sugar juice, it is characterized in that: be get syrup to stir, first add 3.5g/L calcium hydroxide, keep 20 min, add 40ml/L sulfurous acid solution and 1g/L lime carries out Sulphitation and Neutralization, to pH=7, reaction 25min, adds rapidly 14ml/L flocculation agent cationic polyacrylamide subsequently, slowly stirs 2 min, leave standstill 30 min, get flocculate and clarify liquid and get final product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765850.0A CN104561390A (en) | 2014-12-15 | 2014-12-15 | Application of Zeta potential for clarifying sugar juice by sulfitation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410765850.0A CN104561390A (en) | 2014-12-15 | 2014-12-15 | Application of Zeta potential for clarifying sugar juice by sulfitation process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104561390A true CN104561390A (en) | 2015-04-29 |
Family
ID=53078464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410765850.0A Pending CN104561390A (en) | 2014-12-15 | 2014-12-15 | Application of Zeta potential for clarifying sugar juice by sulfitation process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104561390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113881816A (en) * | 2020-07-01 | 2022-01-04 | 广西科技大学 | Sugarcane juice cleaning method |
-
2014
- 2014-12-15 CN CN201410765850.0A patent/CN104561390A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 崔越等: "Zeta电位法优化赤砂糖回溶糖浆絮凝", 《食品工业科技》 * |
| 崔越等: "甘蔗混合汁亚硫酸法澄清过程中Zeta 电位的研究", 《甘蔗糖业》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113881816A (en) * | 2020-07-01 | 2022-01-04 | 广西科技大学 | Sugarcane juice cleaning method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Gregory et al. | Hydrolyzing metal salts as coagulants | |
| Lee et al. | Flocculation activity of novel ferric chloride–polyacrylamide (FeCl3-PAM) hybrid polymer | |
| Li et al. | Optimizing coagulation and flocculation process for kaolinite suspension with chitosan | |
| Devrimci et al. | Algal alginate: A potential coagulant for drinking water treatment | |
| Gao et al. | The size and coagulation behavior of a novel composite inorganic–organic coagulant | |
| Song et al. | Alkaline hydrolysis and flocculation properties of acrylamide-modified cellulose polyelectrolytes | |
| Li et al. | Adsorption and flocculation of bentonite by chitosan with varying degree of deacetylation and molecular weight | |
| Huang et al. | Compound bioflocculant used as a coagulation aid in synthetic dye wastewater treatment: the effect of solution pH | |
| Jiao et al. | Roles of coagulant species and mechanisms on floc characteristics and filterability | |
| CN103641225B (en) | Instant flocculating agent and preparation method thereof | |
| CN101628749A (en) | Macromolecular composite flocculant and preparation method and application thereof | |
| CN104561390A (en) | Application of Zeta potential for clarifying sugar juice by sulfitation process | |
| Yang et al. | Preparation, flocculation and application in sugar refining of eco-friendly dextran-polylysine complex flocculant | |
| JPS635122B2 (en) | ||
| Al-Risheq et al. | Influence of combined natural deep eutectic solvent and polyacrylamide on the flocculation and rheological behaviors of bentonite dispersion | |
| CN110791593A (en) | Method for decoloring sugar juice by using water-soluble magnesium salt-lime | |
| Doherty et al. | Flocculation and sedimentation of cane sugar juice particles with cationic homo‐and copolymers | |
| JP2011131165A (en) | Treatment method for inorganic substance-suspended waste water | |
| Yang et al. | Synthesis and application of polyferric chloride–poly (epichlorohydrin–dimethylamine) composites using different crosslinkers | |
| WO2012125918A1 (en) | Process for improving the flow rate of an aqueous dispersion | |
| CA2883633C (en) | Process for filtration enhancement of aqueous dispersions | |
| Zheng et al. | Biomineralization eliminating marine organic colloids (MOCs) during seawater desalination: Mechanism and efficiency | |
| CN104498637A (en) | Application of Zeta potential in clarification of sulphurous-acid-process sugarcane mixed juice | |
| Elfoulani et al. | Removal of dissolved and colloidal matter from surface waters by composite flocculant aluminum salt-sodium alginate | |
| CN104628107A (en) | Cation-type polymer flocculating agent |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |
|
| RJ01 | Rejection of invention patent application after publication |