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Main uses:Citric acid is the first organic acid in organic acids, because of its physical and chemical properties,derivativeIt is the most important organic acid which is widely used in food, medicine, daily chemical and other industries.
Because citric acid has a mild and refreshing acidity, it is widely used in various beverages,Soda、WineSweets and pastries,BiscuitsThe manufacture of canned food, fruit juice, dairy products and other foods. Citric acid has a market share of more than 70% in all organic acids market, and there is no acid agent that can replace citric acid. A crystalline water, citric acid, is used mainly as a moleculeCool drinkJuice,Jam、Fruit dropAcidity of cans and so onFlavoring agentIt can also be used as cooking oilAntioxidant. At the same time, improve the sensory properties of food, enhance appetite and promote the digestion and absorption of calcium and phosphorus in the body. Anhydrous citric acid is used in large quantitiessolid drinks. Citric acidsaltCalcium citrate and so onFerric citrateIt's something that needs to be added in some foodscalcium ionIron ion fortifier. Citric acid esters, such as citric acid three ethyl ester, can be used as non-toxic plasticizers, plastic packaging for food packaging, beverages and food industry sour, preservatives.
Citric acid can be used as a reagent for chemical analysis in chemical technology. It can be used as an experimental reagent, a chromatographic analysis reagent and a biochemical reagentcomplexing agentA masking agent; used to make upbuffer solution. The use of citric acid or citric acid as a detergent can improve the performance of washing products, can quickly precipitate metal ions, prevent contaminants from re adhering to the fabric, and maintain the necessary washingalkalinityTo make dirt and ash disperse and suspend; to improvesurface active agentIt is a good chelating agent. It can be used as a reagent to test the acid resistance of building ceramic tiles.
GarmentformaldehydePollution is a very sensitive issue, citric acid and citric acid can be modified into a formaldehydeless Creaseproofing rectifying agent for cotton fabricCrease resistant finishing. Not only wrinkle proof effect is good, but also the cost is low.
Citric acid -Sodium citrateBuffer used in flue gasDesulphurization. China is rich in coal resources, which constitutes the main part of energy. However, there is a lack of effective flue gas desulfurization technology, which leads to serious SO2 pollution in the atmosphere. At present, China's SO2 emissions are nearly 40 million tons, it is urgent to study effective desulfurization process. Citric acid sodium citrate buffer solution is a very valuable desulfurization sorbent because of its low vapor pressure, non-toxic, stable chemical properties and high absorption rate of SO2.
PigletsfeedAdding citric acid can early weaning, improve feed utilization rate 5% ~ 10%, increase sow litter size. Adding 1% ~ 2% citric acid in the diet of growing finishing pigs can increase daily gain, reduce feed to meat ratio, and increase the ratio of feed to meatProtein digestibilityReduce the back fat thickness, improve meat quality and carcass characteristics. Rare earth citrate is a new type of high efficiencyfeed additiveIt is suitable for pig, chicken, fish, shrimp, cattle, sheep, rabbit, silkworm and other animals. It can promote the growth of animals, improve the quality of products, improve the disease resistance and survival rate, and improve the quality of productsFeed conversion rateShorten the feeding cycle and so on.
Citric acid combined with 80 temperature has good killing effectBacteriaSpores can kill blood effectivelydialysisContamination of bacteria in the pipe lineBacillus. Enjoy the reputation of "king of Western food" lemon has a strong bactericidal effect, rightFood HygieneVery good, plus a scent of lemon, people always love making salad, not only delicious, but also to enhance the appetite.
stayprothrombinCalcium must be involved in the formation of activators and subsequent coagulation processes. Citrate ions and calcium ions form a soluble form that is difficult to dissociateComplex compoundTherefore, the concentration of calcium ion in blood is reduced, and the blood coagulation is blocked. This product is used as anticoagulant in blood transfusion or laboratory anticoagulant.
Chemical processing or deep processing of citric acid 8.
In addition to the above citric acid itself, citric acid is another major use of deep-processing, which is a rich and colorful industry chain.
Citric acid is a hydroxy acid, in which there are four active groups, three carboxyl groups and one hydroxyl group. The four groups are esterified or alcoholysis or acylation reaction, generating esters, common products Trimethyl Citrate, citric acid ethyl ester three, citric acid three, citric acid three butyl octyl acetate, citric acid three, citric acid three butyl; carboxyl of citric acid can also become salt. Common products are sodium citrate, ammonium citrate, calcium citrate, ferric citrate and ferric ammonium citrate etc.