The sugar solution is treated with ion exchange resin, and the discharge is red

The purpose of brine treatment is to reduce the neutral salt exchange group capacity of the weak alkali resin, or even make it completely ineffective. Because of the high temperature of the sugar solution, the strong base of the weak alkali anion resin is generally natural degradation after more than 10 cycles of use, so I suspect that the quality of the weak alkali anion resin you choose is a bit problematic. At present, the synthesis process of anion resin is more chaotic, and the weak alkali anion resin used in water treatment and the weak alkali anion resin used in the food fermentation industry are essentially different in the production and synthesis process, but now many users generally use bidding and procurement methods, resulting in a blind spell of low price between the best businessmen, and very little investment in applied research, in order to reduce the production cost as much as possible, sometimes the new process of producing resin that has not been confirmed by the application, and putting it into use for some special users.

This also leads to different results for the same product, the same operating conditions, and the use. In addition, borrow your question to state a little more, as far as the sugar liquid separation treatment system in the food fermentation industry is concerned, the domestic Zhengguang resin fully meets the needs of the production process, and there is no need to spend a lot of money to adopt some foreign brands, not to mention that some foreign brands are completely domestic or even domestic OEM. I hope mine can solve your problem, if you have any questions, please feel free to ask or contact.

Can you elaborate more on your question? Because the anion-exchange resin of the sugar solution decolorization product can be used, and there are many models, it is best to have a detailed description: such as the resin model you are using, the nature of the decolorized material liquid, etc

Iron poisoning is generally considered.

Is it the same as the exchange resin that has been affected by the trace amount of iron in the water and other factors (such as temperature)?

Please be clear.

Advantages of ion exchange resins in water treatment applications:

1. The industrial ultrapure water treatment process is one of the most widely used processes in the preparation of industrial ultrapure water.

2. Ion exchange resin in the food industry can be used in industrial equipment such as sugar refining, monosodium glutamate, wine refining, and biological products.

3. Ion exchange resins in the pharmaceutical industry play an important role in the development of a new generation of antibiotics and the quality improvement of the original antibiotics. The successful development of streptomycin is a striking example.

4. Synthetic chemistry and petrochemical industries often use acids and alkalis as catalysts for esterification, hydrolysis, transesterification, hydration and other reactions in organic synthesis.

5. Metal ions in electroplating waste liquid, useful substances in film production waste liquid, etc.

6. Hydrometallurgy and other ion exchange resins can separate, enrich, purify uranium and extract rare earth elements from depleted uranium ore.

1.Mechanical Strength:

The condensate polishing system has high requirements for the strength of the resin, and the strength of the resin not only directly causes the crushing of the resin itself, but also has a significant impact on the safe operation of the boiler. Because of the large difference between the production process of domestic resin and imported resin, the strength of the resin also has a large difference, which is mainly reflected in the rate of decline in the strength of the resin, and the resin strength index (spherical rate after grinding and grinding) tested before the use of the domestic resin and imported resin is not much different, but after a certain period of use, we will find that the index of resin strength changes significantly through testing and other means, and the domestic resin has a significant decline, while the imported resin has no large fluctuation; Moreover, it can also be verified from the reaction of the resin on site that the domestic resin is seriously broken, the annual replenishment rate of the resin is high, and the operating cost increases, while the annual replenishment rate of imported resin is very low and the operation is stable.

2.Swap Capacity:

The larger the exchange capacity of the resin, the longer the water production cycle of the resin, which brings great convenience to the operation, so the exchange capacity is one of the most important indicators of the resin. The contrast between domestic resin and imported resin in this aspect is very large, also because of the difference in production process, the rate of decline in the exchange capacity of domestic resin is very fast, and the operation cycle in production and operation is gradually shortened; The imported resin runs stably.

3.Temperature Resistance:

Due to the wide geographical span of China, the climate difference between the north and the south is large, and there are many air-cooled units in the northwest and other places, and the temperature requirements of air-cooled units are extremely important. In terms of temperature resistance, domestic resin can still meet the operating conditions for general water-cooled units, but the resin performance decreases significantly after being subjected to many high temperature moments; In the air-cooled unit, the domestic resin does not have temperature-resistant conditions. The imported resin can meet the operating requirements of the air-cooled unit in terms of temperature resistance, so the temperature resistance of the imported resin is much stronger than that of the domestic resin.

The hardness of water is mainly composed of cations: calcium (Ca2+) and magnesium (Mg2+) ions. When the raw water containing hardness passes through the na-type resin layer of the exchanger, the calcium and magnesium ions in the water are adsorbed by the resin, and sodium ions are released at the same time, so that the water flowing out of the exchanger is the demineralized water with the hardness ions removed, when the resin adsorbs calcium and magnesium ions to a certain saturation, the hardness of the effluent increases, and the water softener will automatically regenerate the failed resin according to the predetermined program, and use a higher concentration of sodium chloride solution (brine) through the resin to restore the failed resin to the sodium resin.

The principle of the reaction is as follows:

2NAR + Ca2- Car2 + 2Na demineralized water in the mixed bed of yin and yang cation is H type, anion resin is OH type, so that the cation resin exchanges the cation in the water and releases H ions, the anion exchanges the anion in the water and releases the oh ion, and the H+ released by the positive resin combines with the OH- released by the anion to form water, and the reaction principle is:

hr + na+ →nar + h+

roh + cl- →rcl + oh-

h+ +oh- →h2o

Adjust the pH value of the solution to make the amino acids electric, and the pH value is called the isoelectric point of amino acids.

Uses: 1. Use ion exchange resin to decolorize and purify the sugar solution;

2. It is widely used in many industries, especially high-tech industries and scientific research fields;

3. Large processing capacity, wide range of decolorization, high decolorization capacity, can remove a variety of different ions, can be reused repeatedly, long working life, low operating cost (although the cost of a single investment is larger).

Ion exchange resin is a kind of polymer compound with a network structure of functional groups, which is composed of three parts: an insoluble three-dimensional space network backbone, a functional group attached to the skeleton, and exchangeable ions with opposite charges on the functional group. Ion exchange resins can be divided into cation exchange resins, anion exchange resins, and zwitterion exchange resins. If it has acidic functional groups, it can be exchanged with cations in solution, which is called cation exchange resin; If it has an alkaline functional group and can exchange with anions, it is called an anion exchange resin.

Amphoteric resin is a class of ion exchange resins with two groups in the same resin, including strong acid-weak base, weak acid-strong base and weak acid-weak base.

In sugar factories in France, Germany and other countries, ion exchange resin is commonly used for decalcification of dilute sugar juice and potassium and sodium depotassium and sodium processes of No. 2 molasses.

They use the metal ion replacement method, instead of the usual method of replacing metal ions with hydrogen and hydroxide ions, so as to avoid the difficult pollution caused by the use of strong acids and alkalis.

1. Decalcification (softening) of dilute sugar juice.

The sodium ions in the ion exchange resin are used to replace the calcium ions in the dilute sugar juice, and the displacement reaction is: CA2NAR 2NAR2 (NAR stands for cation exchange resin).

The regeneration reaction was: 2Na Car2 Ca2NA2NAR

During regeneration, the resin that no longer acts with calcium ions is backwashed with clean water to remove mechanical dirt and precipitation, and the large and small particles are re-stratified, and then regenerated with saturated salt solution (NaCl). The regeneration reaction was: 2Na Cl Car2 2Na Ca Cl 2.

According to the statistics of 54 sugar factories in France, the average calcium salt content of dilute sugar juice was reduced from 85 mg cao liters to 25 mg cao liters before and after decalcification, which effectively reduced the fouling of the heating pipe of the evaporation tank.

2. No. 2 molasses depotassium and sodium.

After the decalcification of the dilute sugar juice, the amount of sodium ions in the clear sugar juice is increased, and if it is not removed, the sugar loss in the waste honey will be increased. Some sugar factories use magnesium ion exchange resins for potassium removal and sodium treatment of No. 2 molasses. The displacement reaction is as follows:

MGR 2NA (or K) NA2R (or K2R) mg

Due to the low honey formation coefficient of magnesium salt, the loss of sugar in waste honey is reduced.

According to the statistics of eight sugar factories in France that have adopted this method, the average purity of waste honey has been reduced from 60 to 54, so that the weight of sugar on sugar beet can be recovered.

The regeneration of ion exchange resin is also first backwashed with clean water and then regenerated with magnesium chloride (mgCl2) solution. The reaction formula is as follows:

na2r＋mg＋＋cl－2→mgr＋2na＋cl－

The sodium ion exchange resin used in the French sugar factory is the imacti brand from the Netherlands; The magnesium ion exchange resin used is a German reichling grade. According to reports, the resin loss in each sugar production period does not exceed 6%. (Spark).

Uses of ion exchange resins:

1. Food industry:

Ion exchange resin can be used to make sugar, beverages, wine, monosodium glutamate and other fields, high fructose syrup is a product produced after ion exchange resin treatment, ion exchange resin is widely used in the food industry, and the effect is very good, can effectively remove liquid ions.

Second, the chemical industry:

In organic synthesis, ion exchange resin can be used as a catalyst for esterification, hydrolysis and other reactions, and can be used repeatedly, the separation effect is very good, will not cause pollution to the environment, can be effectively controlled, and will not cause harm to the human body.

3. Pharmaceutical industry:

In the 70s, ion exchange resins have been used for pharmaceuticals, at first for drug extraction, separation and purification, etc., due to the reversibility of ion exchange, so it is also used in sustained and controlled release drug delivery systems and targeted drug delivery systems, ion exchange resins can not only be effectively controlled, but also very safe.

Fourth, the water treatment industry:

Ion exchange resin is the most used in water treatment, can be used for water desalination, softening, manufacturing ultrapure water, etc., can also adsorb metal ions in water, can treat industrial wastewater containing heavy metals, especially softened water resin, can effectively remove calcium and magnesium ions in hard water, food grade softening resin production water, can be directly drinkable, very safe.

5. Environmental protection

Ion exchange resins can effectively adsorb substances in aqueous and non-aqueous solutions, and can remove harmful substances, such as sewage treatment, industrial wastewater, etc., and can effectively deal with environmental pollution.

An ion exchange resin is a polymer with corresponding functional groups. In general, conventional sodium ion exchange resins carry a large amount of sodium ions. When the content of calcium and magnesium ions in the water is high, the ion exchange resin can release sodium ions, and the functional groups combine with calcium and magnesium ions, so that the content of calcium and magnesium ions in the water decreases and the hardness of the water decreases.

Hard water becomes soft water, which is the working process of softened water equipment.

2.When a large number of functional groups on the resin are combined with calcium and magnesium ions, the softening ability of the resin decreases, and sodium chloride solution can be used to flow through the resin, at this time, the sodium ion content in the solution is high, and the functional groups will release calcium and magnesium ions and combine with sodium ions, so that the resin will restore its exchange capacity, and this process is called "regeneration".

Causes of ion exchange resin regeneration:

In the process of using ion exchange resin, it is converted with impurities in water, when the adsorption capacity of ion exchange resin has reached a saturated state, the ion exchange resin can no longer continue to adsorb impurities in the water, at this time the ion exchange resin has lost the role of exchanging impurities, if the resin is to be replaced, it will cause a lot of waste of material resources and manpower, so generally after the adsorption capacity of the ion exchange resin reaches saturation, the ion exchange resin should be regenerated.

Cycle of ion exchange resin regeneration:

The regeneration cycle of ion exchange resin is generally based on the actual water quality, if there are too many impurities in the water, it may lead to a shortening of the time for the ion exchange resin to reach saturation, and the regeneration cycle will also be shortened, if the water quality is good, the regeneration cycle will be longer.

Method of ion exchange resin regeneration:

1.When resin is regenerated, 5% of 5L of hydrochloric acid is absorbed from the bottom first, and the backflush is carried out for about 10-15 minutes, and after the yin and yang resins are layered, the yin and yang are treated separately.

2.The cation resin uses 5% concentration of hydrochloric acid for acid absorption and regeneration, and the acid absorption time is about one hour, and then wait for half an hour, then slow rinse for 15 minutes and then fast flush until it is neutral.

3.The anion resin is regenerated by absorbing alkali at a concentration of 5% for 2 hours, and then waiting for half an hour, then slowly rinsing for 15 minutes and then fast flushing until it is neutral.

4.Finally, use the usual inlet water for testing, and if it meets the standard, it can be used.