DE2460322A1 - Purifying, e.g decolourising sugar-contg. liquids - by contact with anion exchange resins derived from crosslinked vinylbenzyl chloride - Google Patents

Abstract

Sugar-contg. liquid is purified, i.e. deionised and decolourised, by contact with an anion exchanger resin (I) derived from a crosslinked vinylbenzyl chloride. quaternary, or strongly basic, as well as weakly basic resins may be used in deionising, and may have gel-like or macroporous structure. Method is used in cane sugar mfr. Advantages include (i) refined sugar quality is improved; (ii) conc. sugar soln. quantity decolourised in a given time can be increased; (iii) process avoids use of large quantities of adsorbent; (iv) decolourising capacity of (I) is 25% better than that of chloromethyl ether styrene resins; (v) (I) are stable to heat; (vi) (I) are more easily regenerated than chloromethyl ether resins.

Description

Methods for cleaning up sugary liquids Priority: Serial No. 428 969 of December 27, 1973 in USA There are two major fields of application for anion exchange resins in the manufacture of cane sugar. These are discoloration and deionizing the sugary liquids. Deionization of sugar solution usually includes discoloration. Discoloration is generally done with help slightly cross-linked quaternary or strongly basic resins of gel-like or macronet-like ones Structure. Deionization takes place in combination or in connection with a cation exchange resin.

When done in combination with this, it becomes the hydroxide ion form of Resin intimately with the acid form of the cation exchange resin to form a mixed in a single layer.

When deionization in conjunction with a cation exchange resin is performed, the hydroxide ion form of the resin becomes a separate entity used, followed by the cation exchange resin. In both cases it works the anion exchange resin so that it absorbs the acids that make up the color body acids that are produced by the cation exchange resin, so that one a completely deionized sugar solution or syrup is obtained, both quaternary (or strongly basic) as well as weakly basic resins are used in deionization used and can have either gel-like or macoporous structure.

It is an object of the invention to provide a method for purifying sugar solutions which has commercial advantages over currently known processes. Another goal is to get a process that is better quality of refined syrup, yet another goal is a process to obtain in which larger amounts of concentrated sugar solutions in a given Time can be discolored. Another goal is to get a procedure that avoids large amounts of adsorbents. Another object of the invention is in obtaining a method that is particularly effective for treating sugar solutions high temperature.

The invention provides a method for purifying sugar liquids, which contain color bodies, and this procedure is that the liquid with a mass or layer of crosslinked vinylbenzyl chloride ion exchange resins brings in touch. In a preferred embodiment of the invention, hot Sugar solution, which contains color bodies, through a layer of particles of a vinylbenzyl chloride -es (VBC) -quaternary ammonium anion exchange resin sent in the chloride form. Color bodies are absorbed on the resin, and anions in solution, especially sulfate, Phosphate and carbonate ions are exchanged for chloride on the resin at the same time. After the resin has used up all of its capacity for impurities, will it was taken out and should be regenerated. In order to achieve this, one lets the sugar solution remaining in the resin layer will drain and the resin layer will then washed with water. Different regeneration solutions are used, however, it is preferred that aqueous solutions of sodium chloride and sodium hypochlorite be used replace the adsorbed anionic color bodies with chloride ions and the solution to their original state. The resins can continue with water or preferably a dilute solution of ammonium hydroxide.

As mentioned above, the ion exchange resins that are used are those derived from crosslinked vinylbenzyl chloride polymers. It was now found these resins surprisingly useful in treating sugar solution as they are surprisingly better decolorizing capabilities and heat resistance own.

If, for example, anion exchange resins based on Vinylbenzyl chloride compared to anion exchange resins became, which have been made by conventional methods, such as a resin based of chloromethyl ether, it was found that the decolorability of the resin based on vinylbenzyl chloride was 25% better than conventional resins based on chloromethyl ether. It also makes the longer life of vinyl benzyl chloride resin as a result of the heat resistance, the resin and the method according to the invention are surprising beneficial in the field of sugar purification.

The resins useful in the process of the present invention can be prepared by any known suitable method. One however, the preferred polymerization method is suspension polymerization, in particular when macro-reticulated resins are desired. The term "suspension polymerization" is known to those skilled in the art and involves suspending droplets of the monomer or monomer mixture in a medium in which the monomer or monomer mixture is essentially insoluble. This can be achieved by making the monomer or adding monomer mixture with any additives to the suspension medium, which contains a dispersing or suspending agent, as for example in the case it aqueous suspending medium the ammonium salt of a styrene-maleic anhydride mixed polymer, Carboxymethylcellose, bentonite, polyvinylimidazoline or poly (diallyldimethylammonium chloride). The dispersant is preferably made stronger in an amount of 0.001 to 5% preferably added in an amount of 0.01 to 1%.

Polymerization processes often use additives or modifiers, who have specialized functions. These Additives should must of course be selected so that they are mutually compatible are. For example, a preferred colloidal stabilizer for the process is according to the invention gelatin. Gelatin has an isoelectric point of about pH 8. It is therefore easy to understand that when gelatin is the stabilizer, the pH of the polymerization medium should not go through this point to prevent possible serious interference with the drop-forming mechanism. Another stabilizer that may be useful in the process of the invention can is magnesium silicate. Since this is an inorganic additive, it is necessary the pH of a polymerization medium that uses magnesium silicate instead of gelatin does not contain such a pH value restriction.

The alkalinity of the polymerization medium can be increased by one or more Additions of a suitable base or by the presence of a sufficient amount are maintained by buffer connections. Other methods of maintenance of the alkaline medium during the polymerization are known to those skilled in the art Hand.

The polymerization of vinylbenzyl chloride and crosslinker can be carried out by a suitable catalyst can be accelerated.

Catalysts that deliver free radicals and as reaction initiators act, are for example benzoyl peroxide, tertiary butyl hydroperoxide, cumene peroxide, Tetralene peroxide, acetyl peroxide, caproyl peroxide, tertiary butyl perbenzoate, tertiary butyl diperphthalate and methyl ethyl ketone peroxide. Other suitable classes of free radical generators Examples of compounds are the azo catalysts.

Another method of carrying out the copolymerization is to the reaction mixture contributes ultraviolet light in the presence of suitable catalysts Expose to ambient temperature or slightly elevated temperatures. Such catalysts are for example bezoin and azobisisobutyronitrile.

The amount of catalyst required is roughly proportional to the concentration of the monomer mixture. The usual range is from 0.01 to 3% by weight of catalyst, based on the total weight of the monomer mixture. The preferred range is at 0.5 to 1.5%. The optimal amount of catalyst is in large part determined by nature the specific monomers selected, including the nature of the impurities, that can accompany these monomers.

As is known in the art, macronet-like polymers are after produced a process requiring the presence of a phase extender or Includes precipitant. These precipitants vary widely in terms their nature and are chosen to be compatible with the monomer mixture used are particularly suitable. For example, if you consider monomers such as divinylbenzene as Crosslinking monomers used are alkanols with a number of carbon atoms 4 to 10 beneficial when used in amounts of 30 to 50% of the total polymer mixture be used. Other suitable precipitants are aliphatic hydrocarbons containing at least 7 carbon atoms such as heptane and isooctane. in the Generally, the amounts of precipitant can range from as little as 10% to as much how 80% of the total weight of monomer and precipitant vary.

A preferred precipitating agent is methyl isobutyl carbinol, which is preferred used in an amount of 25 to 45%, based on the total monomer mixture will.

The polymerization process can be carried out at temperatures in the range of 60 to 1000 C, although the polymerization is preferably carried out between 70 and 900 C. The vinylbenzyl chloride resins of the invention are used hereinafter referred to as VBC resins. The well-known chloromethylated resins are referred to as CME resins.

The following table shows the effect of different amounts of Precipitating agent methyl isobutyl carbinol (MIBC) on the anion exchange capacity (AEC), the percentage of solids and the interpolymer porosity. The VBC resins in the table are typical strongly basic anion exchange resins of the example 1, where only the amount of precipitant varies and 6% Divinylbenzene (DVB) are included as a crosslinker.

Table I Interpolymer Resin No.% MIBC AEC (mAqu / g) Solids (%) porosity (%) 1 28 4.31 41.4 3.5 2 30 4.36 38.6 20.2 3 35 4.38 33.6 29.8 4 40 - - 46.2 Although the use of a single precipitating agent enables the recovery, Purification and recycling of the precipitant facilitated, mixtures of Precipitants are used. A preferred crosslinking monomer is divinylbenzene, but there are many other crosslinkers for use in that Process according to the invention suitable. Suitable crosslinkers are divinyltoluenes, Divinyl naphthalenes, diallyl phthalate, ethylene glycol diacrylate, ethylene glycol dimethacrylate, Divinylxylene, divinylethylbenzene, divinyl sulfone, polyvinyl or polyallyl ether of glycol, of glycerine, of pentaerythritol, of mono- or dithio derivatives of Glycols and of resorcinol, divinyl ketone, allyl acrylate, diallyl fumarate, diallyl maleate, Trimethylolpropane trimethacrylate, diallyl succinate, diallyl carbonate, diallyl malonate, Diallyl oxalate, diallyl adipate, diallyl sebacate, divinyl sebacate, diallyl tartrate, diallyl silicate, Triallyl tricarballylate, triallylaconitate, triallyl citrate, triallyl phosphate, N, N'-methylenediacrylamide, N, N -Methylene dimethacrylamide, N, N'-ethylene diacrylamide, 1,2-di - («- methylmethylene sulfonamide) ethylene, Trivinylbenzene, trivinylnaphthalene, and polyvinylanthracene.

Other useful crosslinking monomers are, for example, the following: Polyvinyl aromatic hydrocarbons, such as trivinylbenzene, glycol dimethacrylate, such as ethylene glycol dimethacrylate, and polyvinyl ethers of polyhydric alcohols, such as Divinoxyethane and trivinoxypropane.

The ratio of vinylbenzyl chloride monomer to crosslinking monomer may vary depending on the use for which the interpolymer is intended, and depending on the nature of the crosslinker, although generally the crosslinker in an amount is from 0.1 to 30%. Preferably it is in an amount of 1 to 10% and most preferably present in an amount of from 5 to 8%.

It is also possible to use a mixed cross-linking system.

The following Table II illustrates the effects of other crosslinking agents Systems and the quantities on the anion exchange capacity.

The resins in Table II are typical strongly basic anion exchange resins, which only vary with regard to the crosslinker Table II Resin No. AEC (meq / g) DVB, o TMPTMA 5 4.52 1.5 2 6 4.10 2 12 7 4.02 3 6 +) Divinylbenzene activity 79.2 % - remainder mainly ethylvinylbenzene) TMPTMA means trimethylolpropane trimethacrylate As mentioned above, there are various precipitants or phase extenders useful in the method of the invention. Isooctane (IO) and 2 - ethylhexanol (2-EH) were examined and the results are in the tables below III and IV listed. Resins 12-15 were made by aminolysis with dimethylamine converted to weak base resins and are of the type shown in Example 2. Resins 7 to 11 are strongly basic resins with a content of 6% DVB and of of the type shown in Example 1.

Table III Resin% IO + Porosity (vol%) AEC (meq)% solids 7 20 - 4.43 43.0 8 25 32.6 4.34 35.5 9 30 46.4-10 50 65.0-11 55 69.0 Table IV + Porosity AEC% solids product porosity resin 2-EH,% + (vol .-%) (meq / g) substances ity (% By volume) 12 25 2.6 4.63 54.1-13 30 25 5.09 53.5-14 35 '27.5 4.90 54.4 24.9 15 40 48.8 4.78 35.3 48.9 The precipitant percentages are based on the weight of the entire monomer mixture.

A wide variety of amines can be used in the amination reaction will. Primary, secondary and tertiary alkylamines or arylamines can be used will. Polyalkylenepolyamines are, for example, ethylenediamine, diethylenetriamine, Triethylenetetramine, tetraethylenepentamine, dimethylamine, trimethylamine, propylenediamine and the same. Amino alcohols, such as dimethylaminoethanol, can also be used successfully be used.

A preferred resin used in the process of the invention Trialkylamine as an aminating agent and thus produces a strongly basic quaternary Ammonium anion exchange resin.

The alkyl radical generally contains no more than 4 carbon atoms, whereby Trimethylamine is the preferred amine. Examples 1 and 2 below illustrate Process for the preparation of the resins used in the process according to the invention. Of course, they should not be viewed as a limitation on the spirit of the invention. All percentages throughout the description are weight percentages, if nothing other is indicated.

Example 3 illustrates a known method of making a typical CME resin, which corresponds in type to a resin produced according to Example 1 became.

Example 4 illustrates a method of making a gel-like one instead of a macro-networked resin.

Example 1 Preparation of a Macro-reticulated Strongly Basic Resin Type 1 680 g of water was placed in a flask. To this stirred aqueous Phase were 4.4 g of gelatin, dissolved in 50 ml of water, 6.4 g of poly-liallyldimethylammonium chloride) as a dispersant, 8.3 g of boric acid and 10.0 g of 50% sodium hydroxide were added. The resulting solution was stirred for 30 minutes.

A solution of 475 g of vinylbenzyl chloride, 39.0 g divinylbenzene (79.2% active), 276.7 g methyl isobutyl carbinol and 5.1 g benzoyl peroxide added. The resulting mixture was heated to 800 ° C. with stirring and 10 Hours. Kept at this temperature. The inert solvent was removed by steam distillation removed and the resulting mixed polymer beads were dried in a steam oven 82.5 g of pearls and 400 g of water were placed in a flask and stirred for 30 minutes. To the resulting sludge, 34 g of anhydrous trimethylamine was added, and the mixture was stirred at 600 ° C. for 4 hours. The temperature was getting slow increased to 100 ° C. to remove the excess amine. The resulting Mixture was cooled and the beads were washed and bottled. The resulting strongly basic resin had an anion exchange capacity of 4.36 meq / g, a solids content of 34% and a porosity of 0.4 ccm / ccmO Example 2 Preparation of a macro-crosslinked weakly basic resin 680 g of water were used put in a flask. 5.8 g of poly (diallyldimethylammonium chloride), 4.0 g of gelatin, 9.4 g of boric acid and 9.2 g of 50% sodium hydroxide solution were added to the resulting Solution was stirred, and the monomer phase, which consists of 410 g vinylbenzyl chloride, 40 g divinylbenzene (79.2 ° Ó active), 264 g methyl isobutylcarbinol and 6.4 g benzoyl peroxide passed was added to the flask. The resulting mixture was 10 hours heated to 800 C, and the inert solvent was removed by steam distillation removed. The resulting beads were washed with water and placed in a steam oven dried overnight.

400 g of the above mixed polymer were in 390 ml of water and 360 g of 50 % strength sodium hydroxide solution slurried 610 ml of 40% strength dimethylamine were added to this mixture The mixture was heated to 650 ° C. and at this temperature for 4 hours held; At the end of this period, the excess amine was through Distillation removed and the product washed neutral and bottled. The resulting weak base resin had an exchange capacity of 5.28 meq / g and a solids content of 42.8%.

The following additional level is not mandatory. To 136 g of the above weakly basic resin in 195 g of water was 18.1 g of 30% hydrogen peroxide added to convert the resin to 19.7% amine oxide form. The mixture was Stirred for 4 hours at 500 ° C., the beads were washed with water and bottled deducted.

The resulting weak base resin was in the amine oxide form an exchange capacity of 5.1 meq / g and a solids content of 38.5%. the The porosity was 0.46 cc / cc of the beads.

Example 3 Preparation of Comparative Resin A 750 g of water were added 4.4 g gelatin dissolved in 50 ml water, 6.4 g polyvinylimidazoline dispersant, 4.0 g boric acid and 5.0 g 50% sodium hydroxide solution were added. The resulting aqueous Phase was stirred for 30 minutes.

A solution consisting of 447 g of styrene, 35 g (55% active) DVB, 318 g MIBC and 4.8 g benzoyl peroxide. The resulting Mixture was stirred rapidly at 300 ° C for 10 hours, and the inert solvent was removed by steam distillation. The resulting mixed polyamide beads were dried in a steam oven.

To 318 g of the above mixed polymer there were 1260 g of CME and 660 g of ethylene dichloride added. The resulting mixture was stirred at 35 to 400 ° C. for 2 hours. That Mixture was cooled to 0 to 50 C and 275 g of aluminum chloride were added during Added for 2 hours while maintaining the temperature below 250 ° C. That The reaction mixture was then heated to 47 to 500 ° C. for 4 hours.

The resulting sludge was cooled to 0 to 50 C and in 1500 ml of cold water quenched. The quenched mixture was drained, then was washed 4 times with 1500 ml of water each time. The last wash liquid was not removed and adjusted to pH 8 with a 20% solution of sodium carbonate.

The resulting product was drained and packaged.

To one third of the above chloromethylated intermediate product sludge 290 g of a 25% aqueous trimethylamine solution (TMA) for 1 to 1.5 Hours added while the temperature was kept at 10 to 150 ° C. After completion After addition of the amine, the mixture was stirred at 10 to 150 ° C. for 4 hours. The excess The amine and solvent were removed by steam distillation and the beads were washed with water to give the final product.

Example 4 Preparation of a gel-like strongly basic resin of Type I A. Copolymerization Aqueous phase Organic phase 477.5 g tap water 20.2 g divinylbenzene (69.2% active) 20.0 g polydiallyldimethylammonium chloride 2.2 g gelatin (pharmaceutical 379.8 g vinylhenzene-purity chloride 4.2 g boric acid 4.0 g benzoyl peroxide 5.1 g sodium hydroxide (50%) A solution of the above aqueous Phase was prepared and added to a 2 liter three-necked flask fitted with a two-bladed Stirrer, thermometer, nitrogen inlet tube and reflux condenser was equipped. The organic phase was premixed and the aqueous phase added without stirring. Stirring then started at 205 rpm. One formed Dispersion when turning the stirrer on and off. After the dispersion was formed heated to 800 C and 10 hours until the end of the polymerization on this The temperature was maintained. The aqueous phase was removed and the suspension polymer Washed 2 times with a total of 1000 ml of water. The polymer was then 16 hours dried at 800 ° C. to give 397 g of dried polymer containing 20.9% chlorine.

B. Aminolysis 160 g dry copolymer (as above) sieved to -20 + 70 (US standard sieve series) 300 ml ethylene dichloride 450 ml methanol 65 g anhydrous Trimethylamine The mixed polymer and ethylene dichloride were in a 2 l flask, the one with a stirrer, a thermometer, a dry ice condenser and an inlet port was equipped for trimethylamine, mixed. After the copolymer in ethylene dichloride Allowed to swell for 30 minutes, methanol was added to the mixture to make it flowable. Stirring began and the temperature of the contents of the flask rose lowered to 100 C by external cooling. Then the trimethylamine was during 2 Hours added to the reactor, the temperature being kept at 100 ° C. the The temperature was then increased to 600 ° C. over 4 hours. The excess The amine and about 100 ml of methanol were then removed by distillation. At this Water was slowly added to the point to maintain fluidity. Distillation was continued until all of the methanol and ethylene dichloride were recovered. The batch was then cooled to 500 ° C. and washed with water and the resin obtained by suction filtration. In this way, 610 g of a resin were obtained 35.2% solids content with a total anion exchange capacity (TAEC) of 4.52 meq / g and a true strongly basic capacity (TSB) of 4.49 mAq / g.

The sugar purification process of the present invention makes Using the physical stability of an ion exchange resin The piston pump test is an accelerated test designed to determine the resistance of an ion exchange resin to measure against abrasion under simulated and exaggerated conditions.

Piston pump test The test is carried out with 200 ml of resin in columns of one diameter 2.5 cm (1 inch) operating under constant pressure (2.7 at -40 psi), carried out. The resin is subjected to repeated treatments with 1.2N H2SO4 and 3.5N NaOH, rinsing with water between the solutions Acids Solution and base solution are going up through the resin layer sent, and the rinse water is sent down through the layer. The cycles are automatically set with a programming device, and the flow rates during consumption (acid) and regeneration (base) every five cycles measured. After 50 cycles the test is canceled because there is a good relationship between the performance in a commercial process and the performance in the piston pump test was achieved. The change in flow rate from the initial reading that after 50 cycles is an excellent measure of physical stability the resins. When destruction occurs, smaller resin particles (fines) formed and at constant pressure the flow rate would then decrease. Conversely, if the resin does not experience physical destruction or comminution, the particle size remains essentially constant, so that the flow rate remains constant.

A second measure of the resin stability in the piston pump test is the Change in the exact number of pearls in the resin sample after 50 cycles. Representative Resin samples taken before and after the test are microscopic for broken pearls checked. The higher the number of undestroyed pearls after the Test, the more stable the resin is.

Macro-reticulated, strongly basic anion exchange resins made from vinylbenzyl chloride manufactured according to Example 1 have excellent physical stability in the piston pump test compared with resins made from chloromethylated styrene according to Comparative Example 3 were produced. Typical results the with a CME resin and a VBC resin are shown below.

% Change-flow velocity of% undestroyed, 1 / hour. Flow velocity Beads resin mEq / g initially at the end speed before after VBC (example 1) 4.36 100 100 0 99 99 CME (Comparative Example 3) 4.40 100 70 30 99 85 The test results were obtained with resin samples that have been sieved to exactly the same particle size were, and therefore the great improvement in performance in the VBC resin directly in its manner of manufacture and not in varying the particle size distribution can be attributed.

Quaternary ion exchange resins may be subject to some decomposition, especially when they are in the hydroxide form.

This instability is strongly promoted by increased temperature. Two paths are followed in this decomposition reaction.

To find the useful ion exchange resins in terms of thermal To test resistance, the strongly basic vinylbenzyl chloride anion exchange resins were used of the type described in Example 1 and a corresponding chloromethylated resin, as described in Comparative Example 3, subjected to the following test.

The resin, as received, became completely hydroxide form converted using approximately 1000 ml of 1N NaOH for 15 ml of resin. The resin was rinsed with D.I. water and placed in a suitable container to remove excess D.I. water contained (such as ratio of water to resin at least 20: 1), and the container was placed in an oven at the appropriate temperature. Periodically became removed the sample, completely converted to the HCl form and tested for the Solids content and the real capacity for strong base. Thereafter The resin was restored using 1N HCl and then 1N NaOH converted to the hydroxide form and placed in the same temperature environment. Some spot checks were carried out at all temperatures to confirm that the resins were completely in the hydroxide form during the test periods. The results show that the VBC resins have significantly greater thermal stability than the corresponding CME resins.

Another advantage of the strongly basic VBC resins over known ones CME resins are those of improved regeneration effectiveness. The real regenerative effectiveness of a strong base resin is obtained by plotting the ratio of actual Column capacity to theoretical column capacity (% utilization) versus the ratio from equivalents of regenerant used to total equivalents available certainly. If a typical VBC resin in terms of its regenerative efficiency tested according to the definition above and according to known analytical procedures showed a significant improvement in comparison with the regeneration efficiency one typical and corresponding CME resin. The improved e-generation efficiency of VBC resins compared to CME resins with normal use of regenerant in the range of at least about 10% and can be as high as 30% in some embodiments under preferred conditions. The importance of this improved regeneration effectiveness is that the end user can use less regenerant to to achieve a desired column capacity when using VBC resins than when he would use CME resins, so the total regenerant cost would go up sharply Reduce.

The following explanations further explain the method according to the Invention and provide a measure of the decolorability in comparison with the State of the art.

Method 1 40 ml of a quaternary ion exchange resin according to the example 5 were placed in a 50 ml burette. A resin based on CME according to the example 1 was rated in the same way. A sugar syrup, clarified affinadeo with 50 to 70% solids was obtained through both resins in parallel at 3 BV / hr. passed through. The color became continuous using the spectral wavelength of 420 mm is determined with the following results. After 48 times the volume of the layer the percent paint removal for the VBC-based resin was 75% while the CME resin only removed 60% of the paint.

Method II 28 ml of weakly basic resin according to Example 2 were added intimately mixed with 12 ml of a strongly acidic resin and placed in a column of 50 ml given. A corresponding resin based on CME was evaluated in the same way. A typical sugar syrup, clarified and charcoal treated affinade was made through each resin layer in parallel with 4 BV / hour. sent. The attempts were ended, when the pH of the spout fell below 6, resulting in complete consumption of the basic resin showed. The following results were obtained:% Removal Resin based on VBC- Resin based on CME Throughput (BV) Ash Color Ash Color 75 98 94 98 75 Procedure III 28 ml of a strongly basic ion exchange resin according to Example 5 were intimately mixed with 12 ml of a strongly acidic resin and placed in a 50 ml column. A corresponding CME resin of the type according to the example 3 was rated in the same way.

A typical sugar syrup (clarified and charcoal treated affinade) was through such a resin layer in parallel with 4 BV / hour. sent. The trials were stopped when the pH of the spout fell below 6, resulting in complete exhaustion of the basic resin showed. The results are summarized below: % Removal of VBC Resin- CME-Based Resin Throughput (BV) Ash Color Ash color 60 99 97 99 88

Claims (5)

Claims 1. A method for cleaning a sugary liquid, characterized in that the liquid is treated with an anion exchange resin, which is derived from a crosslinked vinylbenzyl chloride, brings into contact. 2. The method according to claim 1, characterized in that as Anion exchange resin a strongly basic or weakly basic ion exchange resin used. 3. The method according to claim 1 and 2, characterized in that one the sugar-containing liquid additionally with a cation exchange resin in Brings touch. 4. The method according to claim 1 and 2, characterized in that one a resin with a macronet-like or gel-like structure is used. 5. The method according to claim 1 to 4 for removing ionizable substances from a sugar-containing solution, characterized in that the solution is first by a bulk or layer of a weakly basic vinylbenzyl chloride ion exchange resin which has been converted to the bicarbonate form, and then the outlet from the weakly basic anion exchange resin, through an acidic vinylbenzyl chloride cation exchange resin leads in the hydrogen form.