CN1958811A - Composite type clearing agent in use for refining sugar, and preparation method - Google Patents
Composite type clearing agent in use for refining sugar, and preparation method Download PDFInfo
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- CN1958811A CN1958811A CNA2006100368377A CN200610036837A CN1958811A CN 1958811 A CN1958811 A CN 1958811A CN A2006100368377 A CNA2006100368377 A CN A2006100368377A CN 200610036837 A CN200610036837 A CN 200610036837A CN 1958811 A CN1958811 A CN 1958811A
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Abstract
This invention relates to a composite clarification agent used in sugar production. The composite clarification agent is composed of: polymerized AlCl3, organic polymeric materials (including chitosan, chitosan quaternary ammonium salt and dimethyl diallyl ammonium chloride), and ultra-fine powder (including perlitic powder, diatomite and clay) at a ratio of (45-90) :( 1-10) :( 5-50). The composite clarification agent has high electrical neutralization and bridge linkage performances, and has such advantages as low cost, rapid solid-liquid separation and no toxicity. The composite clarification agent is suitable for clarifying mixed juice, filtrate and syrupy in sugar production. The method has such advantages as abundant raw materials, simple process and easy operation.
Description
Technical field
The present invention relates to cane sugar factory juice,liming processing finings technical field.
Background technology
Present stage is in the sugarcane sulfitation sugar mill of China, because the peace and quiet percent of decolourization of syrup is low, and the colour of white sugar and ash and SO
2Content is higher, is difficult to produce the fine white sugar.In order to improve the peace and quiet decolorizing effect of syrup, sugar refinery adds the clarify and decolorize agent usually in the peace and quiet process of syrup.Therefore the clarify and decolorize agent is one of requisite chemical assistant in the sugar clarification process, and its result of use directly influences quality product and cost.Succeeding in developing of a kind of efficient clarify and decolorize agent will bring once new reform to sugar refining technology, also makes quality product rise to a new step.In decades, sugaring worker both domestic and external has done a large amount of development work in this respect, and has obtained certain progress.
The sugar of existing report mainly contains inorganic finings and cationic organic high-molecular finingss such as polyacrylamide, chitosan such as polymerize aluminum chloride (as G409, TR decolouring purification agent), polymer aluminium silicate, polymeric silicicacid zinc with the clarify and decolorize agent.Sugar with finings the mechanism of action of syrup mainly be based on these cationic high-molecular materials to syrup in electronegative colloid and the charge neutrality ability of pigment and stronger absorption property.Inorganic finings generally has stronger absorption charge neutrality ability, but its molecular weight is relatively low, in clarifying process, realize the limited in one's ability of bridge formation that bond between colloidal solid, obtain desirable bridge formation flocculating effect often need the to have high input finings of dosage, cause the increase that medicament expense uses and the problem of residual aluminum content overproof.Its deficiency is that also its formed throw out is tiny, loose when doing sugar with finings processing sugarcane juice with inorganic polymerize aluminum chloride, and volume is big, and sedimentation or ascent rate are slower, and mud juice or scum silica frost are more difficult.The cationic organic high-molecular finings generally has higher molecular weight and linear long molecular structure, has the ability that bonding is built bridge between very strong particle, but because cationic organic high-molecular finings electric density is not high, its charge neutrality ability relatively a little less than, be subjected to restrictions such as long-chain hydrocarbon-based raw material and manufacturing cost simultaneously, the use cost of cationic organic high-molecular finings is higher.
Fundamental research for the juice liming discoloring agent has had more reported in literature, result of study is thought, cooperate conduct sugar to use the clarify and decolorize agent with cationic inorganic polymer material and cationic organic polymer material, to sugar refinery juice liming best results.The snack made with traditional Chinese medicines that adds that is used normally at two or more of cationic inorganic polymer material and cationic organic polymer material adds independent component respectively in reported in literature, and each component is done respectively in order to reach best clarifying effect.Therefore medicine machine and the instrument that needs is more, and schedule of operation is complicated, when the treatment capacity of syrup is unstable, operates and adjusts and all compare difficulty.
Ultra-fine powder technology is with the emerging science and technology that modern age, development of science and technology grew up, and is the important component part of Materials science.In water technology, using superfine powder has had relevant report as nucleus to strengthen flocculating result.In recent years be reported in and sneak into kaolin in the milk of lime, lime carbonate, ultra-fine grains such as coal ash are used for sugarcane juice to be handled with the enhance clarification effect.But using superfine powders such as highly purified diatomite, perlite powder, clay and inorganic/organic cation carries out compoundly not appearing in the newspapers as yet with finings as a kind of sugar.
In view of the foregoing, the compound finings of inorganic-organic-superfine powder can be given full play to the absorption charge neutrality effect of inorganic polymer can give full play to organic macromolecule bonding bridging action again, strengthened the peace and quiet effect of cohesion by the nucleus effect of superfine powder simultaneously, and only need once add finings just can reach efficient clarifying purpose in the juice liming treating processes, this is for the processing power that improves clarification equipment, simplify the operation, the aspect such as raising the efficiency and play an important role, is a kind of up-and-coming novel sugar finings.
Summary of the invention
Main purpose of the present invention is to overcome existing sugaring with the shortcoming that finings exists, and a kind of efficient, economic sugaring compound clarifier is provided, and is used for the mixing juice of auxiliary treatment cane sugar factory and filtered juice and raw sugar to starch; Another object of the present invention provides the preparation method of this compound sugar with finings.
Purpose of the present invention can realize by following technical solution:
A kind of composite type clearing agent in use for refining sugar, mix by polymerize aluminum chloride, organic polymer material, superfine powder, wherein organic polymer material is meant the combination of multipolymer one of them or they of chitosan, chitosan quaternary ammonium salt, dimethyl diallyl ammonium chloride polymkeric substance, dimethyl diallyl ammonium chloride and acrylamide, it is characterized in that the weight ratio of each component is:
Polymerize aluminum chloride 45～90%;
Organic polymer material 1～10%;
Superfine powder 5～50%.
Described superfine powder is the combination of perlite powder, diatomite or clay one of them or they.
Al in the described polymerize aluminum chloride
2O
3Content is 28.5～30%, basicity 65～95%.
The deacetylation of described chitosan is 80～90%.
The fineness of described superfine powder is 200～400 orders.
A kind of preparation method of aforesaid composite type clearing agent in use for refining sugar is characterized in that comprising the following steps:
Step 1 is dissolved into certain density solution with solvent with organic polymer material;
Step 2, with solution that step 1 is joined and superfine powder by being mixed into organic composite material;
Step 3 is mixed into organic/inorganic composite material with the polymerize aluminum chloride with certain basicity again with step 3 gained organic composite material;
Step 4, the chitosan that will have certain deacetylation at last joins the organic/inorganic composite material of step 3 gained and mixes at normal temperatures and pressures to stir and promptly becomes the compound sugar finings finished product of powdered.
The mixing and blending machine rotating speed is 100～500r/m, and the mixing whipping temp is a normal temperature.
For simplifying technical process, also above-mentioned steps two, step 3 and step 4 can be combined into:
Step 2 is put into mixing machine with solution that step 1 is joined with superfine powder, polymerize aluminum chloride and chitosan and is mixed into and is compound sugar finings finished product.
The compound sugar that is made by aforesaid method can be applicable to cane sugar factory mixing juice and filtered juice and thick syrupy clarifying treatment process with finings.
This compound sugar with the action principle of finings in cane sugar factory mixing juice and filtered juice and raw sugar slurry clarifying treatment process is:
When compound sugar is joined mixing juice and filtered juice and raw sugar slurry with finings,
The polymerize aluminum chloride that has the inorganic cation that adsorbs the charge neutrality ability more by force in the finings takes off surely the electronegative property coloring matter and the colloidalmaterial charge neutrality that contain in mixing juice and the filtered juice, and plays the adsorption bridging effect.But because its molecular weight is relatively low, in clarifying process, realize the limited in one's ability of bridge formation that bond between the colloidal solid thing, this moment, compound sugared organic cation polymer with the ability that has the bridge formation that bonds between very strong particulate matter in the finings utilized it to have big molecular weight and linear long molecular chain structure, made the formed alumina blossom particles increase of inorganic cation effect, closely knit.
In cane sugar factory mixing juice and filtered juice clarification and raw sugar slurry treating processes, the flocculation particle is subjected to mixing juice and the big influence of filtered juice syrup density, and solid-liquid separation time is often long, has influenced clarifying effect.Compound sugar has played the effect of nucleus with the superfine powder in the finings in syrup, non-sugar such as the colloidalmaterial in the ultrafine powder cognition of finings and mixing juice or filtered juice or the syrup, pigment combine alternately, form bigger flocculation particle.These bigger flocculation particles are with the fast speeds sedimentation in the clarifying process of mixing juice and filtered juice; And these bigger flocculation particles can be bundled together with the microbubble newspaper in syrupy clarifying process, rapid supernatant liquid face under buoyancy function; Thereby realized the solid-liquid separation of short period of time.
This compound sugar can be by the proportioning of positively charged ion inorganic polymer polymerize aluminum chloride and cationic organic high-molecular material and superfine powder in the control finings with finings, optimize forceful electric power neutralizing effect and the bonding bridging action of cationic organic high-molecular and the nucleus effect of superfine powder of positively charged ion inorganic polymer, thereby reach mixing juice and filtered juice and thick syrupy efficient clarifying treatment.
Be compared with the prior art, the present invention has following substantive distinguishing features and marked improvement:
1. made full use of on the organic cation fractionated polymer subchain the superimposed effect of positive charge of positively charged and inorganic cation, strengthened the compression double electric layer ability, make to produce local widely contact cohesion between particle, thereby improve decolorizing effect.Having made full use of organic cation fractionated polymer subchain builds bridge between the steady particulate matter and the nucleus strengthening effect of superfine powder forms big floc sedimentation and quickens under sedimentation or the effect at microbubble come-up rapidly taking off.Thereby shortened solid-liquid separation time, improved the clarification usage ratio of equipment greatly.
2. made full use of of the modifying and decorating effect of inorganic cation/organic cation to superfine powder, be mixed with finings in the process of using liquid at compound sugar and make electronegative superfine powder be positive polarity, strengthened sugared compression double electric layer ability and adsorptive power, made the clarify and decolorize effect reach higher level with finings.
3. compound sugar of the present invention is easy to get with the finings raw material sources, and manufacture method is simple, and cost is low, is easy to realize suitability for industrialized production.
4. compound sugar of the present invention with finings owing to having higher clarifying efficiency, when therefore in sugarcane sulfitation sugar mill clarifying process, using, it has not only improved the quality product (as the colour that reduces white sugar, turbidity, sulfurous gas etc.) of white sugar, but also can reduce consumption such as subsidiary material such as phosphoric acid in the former sulfurous method flow process, reduce production costs.
Embodiment
The present invention is further detailed explanation below in conjunction with embodiment:
Embodiment 1
Step 1, becoming concentration with water dissolution dimethyl diallyl ammonium chloride homopolymer is 10% solution, gets 8 kilograms in storage tank;
Step 2, get 10 kilograms in 30 kilograms in 300 order diatomite, 300 order perlite powders in mixing machine, be not stop to stir under 100 rev/mins the condition at rotating speed, slowly add 8 kilogram 10% Poly Dimethyl Diallyl Ammonium Chloride solution in the powder simultaneously, after the adding of Poly Dimethyl Diallyl Ammonium Chloride solution finishes, continue to stir 15 minutes;
Step 3, (basicity is 85%, Al with 150 kilograms polymerize aluminum chloride then
2O
3Content is 30%) join in the mixing machine;
Step 4 is that 85% chitosan joins in the mixing machine at last with 5 kilograms of deacetylations, continues thereafter to stir after 30 minutes to stop;
Step 5 is taken out mixture from mixing machine, incorporate the bag packing into and promptly get compound sugar finings-1 of the present invention.
The weight percent content of each component is in this example:
Polymerize aluminum chloride 75%,
Diatomite 15%,
Perlite powder 5%,
Dimethyl diallyl ammonium chloride homopolymer 0.4%,
Chitosan 2.5%.
Use
Will above-mentioned compound sugar on pressing 750 tons sugarcane sulfitation sugar mill production line day in the mixed juice case after with the pre-ash of finings-1 dilution back adding sugarcane juice, compound sugar is 300kg/1000 ton sugarcane with the addition of finings-1, the phosphoric acid addition is reduced to and does not add compound sugar 50% (being 140kg phosphoric acid/1000 ton sugarcanes) with finings-1 o'clock, continuous dosing 176 hours.Result such as following table 1: by table as seen, compound sugar with finings-1 not only improved effectively sugarcane juice the decolouring turbidity removal effect, reduce filter mud residual sugar, reduced the sugar part of producing and lost.And reduced the subsidiary material of clarifying process, reduced production cost.
Table one
| The experiment sequence number | Experimental period | Mixing juice | Subsider juice | Percent of decolourization % | Filter mud | The sulfur dioxide residual quantity mg/l of subsider juice | ||||||
| The PH value | Colour st | The PH value | Colour st | Turbidity | Purity difference | Filter mud moisture content % | Filter mud pol % | Dry filter mud pol % | ||||
| 1 | 48 hours dosing samples not continuously | 7.22 | 205.6 4 | 7.19 | 15 5 | 9.47 | 0.475 | 24.45 | 73.92 | 6.07 | 23.32 | 6 |
| 2 | 152 hours continuous dosing samples | 7.63 | 218.9 9 | 7.17 | 15 1 | 10.19 | 0.52 | 31.05 | 74.34 | 5.81 | 22.63 | 4.5 |
Embodiment 2
Step 1 is got 7.5 kilograms of concentration and is the multipolymer of 10% dimethyl diallyl ammonium chloride and acrylamide and 7.5 kilograms of aqueous solution that contains 10% chitosan quaternary ammonium salt in storage tank and mix and become the organic polymer material mixed solution;
Step 2 is got 21 kilograms of 30 kilograms in 300 order diatomite, 15 kilograms of 300 order perlite powders and 300 order clays in mixing tank, at rotating speed is not stop to stir under 100 rev/mins the condition; The organic polymer mixed solution of step 1 is slowly added in the mixing tank of step 2 in the powder, continue to stir 15 minutes;
Step 3, (basicity is 85%, Al with 75 kilograms polymerize aluminum chloride again
2O
3Content is 30%) add in the mixing tank;
Step 4 is that 90% chitosan adds and continues in the mixing tank to stir after 30 minutes to stop at last with 5 kilograms of deacetylations;
Step 5 is taken out mixture from mixing machine, incorporate the bag packing into and promptly get compound sugar finings-2 of the present invention.
The weight percent content of each component of this example is:
Polymerize aluminum chloride 50%,
Diatomite 20%,
Perlite powder 10%,
Clay 14%,
Dimethyl diallyl ammonium chloride and acrylamide copolymer 0.5%,
Chitosan quaternary ammonium salt 0.5%,
Chitosan 3.0%.
Use
On the sugarcane sulfitation sugar mill production line of 1500 tons of day processing filtered juices, with compound sugared technical process with finings-2 dilution back filtered juice rapid subsidence treatment system below the ratio adding of the about 100kg/1000 ton of addition filtered juice (from the next filtered juice of vacuum filter without cloth).Table 2 is the result of test, and the result shows that it is quite effective that compound sugar reaches the raising of the clear degree of filtered juice and the raising of purity with finings its decolorizing effect in the technology of filtered juice rapid subsidence clarifying treatment.Handle the on-the-spot function situation of filtered juice from the rapid subsidence pond and also can see, add the situation that first mud juice visor of slave unit behind the finings can be observed the thick and rapid subsidence of deposit seeds, second mud juice visor of equipment be can't see deposit seeds substantially.This has just illustrated that compound finings cooperates the rapid subsidence pond to use and not only can improve the quality of filtered juice, and can shorten the residence time of filtered juice in the rapid subsidence pond, thereby has improved the processing power of equipment.
Accompanying drawing 1 is the process flow sheet that should use example.
Table two
| Administration timing of drug H | Chemical feeding quantity KG | Filtered juice treating capacity M3/H | Fining agent is to juice treating capacity KG/KT | Filtered juice | The result | ||||||
| Hammer degree BX | Letter purity | The PH value | Colour ST | Clear degree | Purity improves | Percent of decolourization % | Clear degree improves % | ||||
| Blank | 0 | 64.2 | 15.32 | 85.3 | 7.6 | 315.2 | 11.75 | ||||
| 13.3 | 90 | 105 | 15.31 | 85.87 | 6.4 | 114.5 | 19.8 | 0.57 | 63.7 | 68 | |
Remarks: blank is 8 hours, and data are the mean value of sample analysis data in the table
Embodiment 3
It is 10% solution that step 1, water dissolving dimethyl diallyl ammonium chloride homopolymers become concentration, gets 10 kilograms in storage tank;
Step 2, get 15 kilograms in 400 order diatomite in mixer, be under 100 rev/mins the condition 10 kilogram 10% PDDA solution slowly to be added in the powder at rotating speed, PDDA solution add complete after, continue to stir 15 minutes;
Step 3, (basicity is 85%, Al with 165 kilograms aluminium polychloride then2O
3Content is 30%) join in the mixer;
Step 4 is that 85% shitosan joins in the mixer at last with 15 kilograms of deacetylations, continues thereafter to stir after 30 minutes to stop;
Step 5 is taken out mixture from mixer, incorporate the bag packing into and namely get compound sugar fining agent-3 of the present invention.
The weight percent content of each component is in this example:
Aluminium polychloride 82.5%,
Diatomite 7.5%,
Dimethyl diallyl ammonium chloride homopolymers 0.5%,
Shitosan 7.5%.
Use
In the raw sugar slurry air float process for producing flow process of the sugarcane sulfitation sugar mill that presses 2500 tons of sugarcanes day, replace the water purification agent of former technological process to add in the raw sugar slurry air float treatment system with the rear ratio in the about 200kg/1000 ton of addition syrup of fining agent-3 dilution compound sugar. The result is as shown in table 3. By table 3 as seen, this compound sugar can carry out clarifying treatment to the raw sugar slurry effectively with fining agent, and the water purification agent treatment effect of relatively former use is better.
Accompanying drawing 2 is sugar refinery raw sugar slurry air float process chart,
Table three
| Medicament | Administration timing of drug H | Syrup treating capacity T/H | Fining agent is to syrup treating capacity KG/KT | White Sugar Quality | ||
| Colour IU | Turbidity | Insoluble matter mg/kg | ||||
| Water purification agent | 40 | 26 | 200 | 116.95 | 3.74 | 47.2 |
| Compound sugar fining agent-3 | 40 | 200 | 112.94 | 3.44 | 36.8 | |
Annotate: 1) country-level white granulated sugar standard: colour＜170IU turbidity＜9 degree insoluble matter＜50mg/kg.
Claims (5)
1. composite type clearing agent in use for refining sugar, mix by polymerize aluminum chloride, organic polymer material, superfine powder, wherein organic polymer material is meant the combination of multipolymer one of them or they of chitosan, chitosan quaternary ammonium salt, dimethyl diallyl ammonium chloride polymkeric substance, dimethyl diallyl ammonium chloride and acrylamide, it is characterized in that the weight ratio of each component is:
Polymerize aluminum chloride 45～90%;
Organic polymer material 1～10%;
Superfine powder 5～50%.
2. according to the described compound finings of claim 1, it is characterized in that: described superfine powder is one of them of perlite powder, diatomite or clay or their combination.
3. according to the described compound finings of claim 1, it is characterized in that: Al in the described polymerize aluminum chloride
2O
3Content is 28.5～30%, basicity 65～95%; The deacetylation of chitosan is 80～90%; The fineness of superfine powder is 200～400 orders.
4. the preparation method as claim 1 or 2 or 3 described composite type clearing agent in use for refining sugar is characterized in that comprising the following steps:
Step 1 is made into certain density solution with organic polymer material with thinner;
Step 2, solution that step 1 is joined and superfine powder be mixed in proportion becomes organic composite material;
Step 3 is mixed into organic/inorganic composite material with the polymerize aluminum chloride with certain basicity again with step 2 gained organic composite material;
Step 4 joins chitosan the organic/inorganic composite material of step 3 gained at last and promptly becomes compound sugar finings finished product through mixing to stir at normal temperatures and pressures.
5. the preparation method of composite type clearing agent in use for refining sugar as claimed in claim 4 is characterized in that step 2, step 3 and step 4 are combined into:
Step 2 is put into mixing machine with solution that step 1 is joined with superfine powder, polymerize aluminum chloride and chitosan and is mixed into and is compound sugar finings finished product.
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| CN1958811B (en) | 2010-05-12 |
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