Citric acid is mainly used as a sour agent for food, but also for the preparation of pharmaceutical cooling agents, detergent additives, etc.

Citric acid is biodegradable. It can be converted into carbon dioxide and water by the action of microorganisms in water without polluting nature. It is a good chemical raw material.

effect:

1. Food industry

1) Because citric acid has a mild and refreshing sour taste, it is commonly used in the manufacture of various beverages, soft drinks, wine, candy, snacks, biscuits, canned fruit juices, dairy products and other foods, and can also be used as an antioxidant in edible oils. At the same time improve the sensory properties of food, enhance appetite and promote the digestion and absorption of calcium and phosphorus substances in the body.

2) Citric acid salts such as calcium citrate and ferric citrate are fortifiers that need to add calcium and iron ions in certain foods.

3) Citric acid esters such as triethyl citrate can be used as non-toxic plasticizers to make plastic films for food packaging. They are sour agents and preservatives in the beverage and food industries.

2. Industrial applications

1) Citric acid can be used as reagent for chemical analysis, experimental reagent, chromatographic analysis reagent and biochemical reagent; used as complexing agent, masking agent; used to prepare buffer solution.

2) The use of citric acid or citrate as a builder can improve the performance of washing products, can quickly precipitate metal ions, prevent contaminants from re-attaching on the fabric, and maintain the necessary alkalinity for washing; disperse dirt and ash and Suspension; improve the performance of surfactant, is an excellent chelating agent;

3) Can be used as a reagent for testing the acid resistance of architectural ceramic tiles.

4) Citric acid and modified citric acid can be made into a formaldehyde-free anti-crease finishing agent, used for anti-crease finishing of pure cotton fabrics. Not only the anti-wrinkle effect is good, but also the cost is low.

5) It also has metal complexing ability, good complexing ability to metal ions, and is used as complexing agent and buffering agent in electroplating industry.

3. Environmental protection

Citric acid-sodium citrate buffer is used for flue gas desulfurization. Citric acid-sodium citrate buffer solution is a desulfurization absorbent with great development value because of its low vapor pressure, non-toxicity, stable chemical properties, and high SO2 absorption rate.

4. Livestock feed

Adding citric acid to piglet feed can wean early, increase feed utilization by 5% to 10%, and increase sow litter size. Adding 1% to 2% citric acid to the growing fattening pig diet can increase daily gain, reduce feed-to-meat ratio, increase protein digestibility, reduce backfat thickness, and improve meat quality and carcass characteristics. Rare earth citric acid is a new type of high-efficiency feed additive, suitable for various animals such as pigs, chickens, fish, shrimps, cattle, sheep, rabbits, silkworms, etc. It can promote animal growth, improve product quality, improve disease resistance and survival rate, Improve the feed conversion rate, shorten the feeding cycle and other characteristics.

5. Cosmetics

Citric acid is a kind of fruit acid. Its main function is to speed up the renewal of keratin. It is commonly used in lotions, creams, shampoos, whitening products, anti-aging products, and acne products. The renewal of keratin contributes to the exfoliation of melanin in the skin, the refinement of pores, the dissolution of blackheads, etc.

6. Cleaning and descaling

Citric acid has the ability to disinfect, bleach, and eliminate fat. It can remove scale, wipe the surface of kitchen stoves, clean sinks, sewer pipes, and clean glass surfaces.

7. Sterilization

The combined action of citric acid and 80 ℃ temperature has a good effect of killing bacterial spores, and can effectively kill the bacterial spores contaminated in the pipeline of the hemodialysis machine.