The lactic acid name is a-hydroxypropionic acid, which is widely used in pharmaceutical, brewing, food, beverage, health care products, paper, leather, cigarette, paint, ink, electroplating and plastics industries and oil pipeline anticorrosion.
Food field
Meat and poultry products
Lactic acid is an organic acid that is widely found in meat. L-sodium lactate captures a large amount of free water in foods and has the effect of reducing water activity, thereby inhibiting the growth of microorganisms. Therefore, it is widely used in the meat and poultry food processing industry to extend the shelf life of products. In addition, it enhances and maintains the flavor of the product.
2. Vegetable pickled products
Lactic acid can adjust the pH value, thereby controlling fermentation and inhibiting the growth of pathogenic microorganisms, effectively preventing spoilage of radish, cabbage, cucumber, onion and other vegetables marinated in salt water, ensuring product stability and improving taste.
3. Beverages and wine making
Lactic acid has a mild acidity and is a preferred sour agent for delicately formulated soft drinks and juices. L-calcium lactate,
Iron, magnesium, zinc, etc. are used as mineral enhancers for juices, health drinks and soft drinks. When brewing beer, adding proper amount of lactic acid can adjust the pH value to promote saccharification, facilitate yeast fermentation, improve beer quality, increase beer flavor and extend shelf life. It is used to adjust pH in liquor, sake and fruit wine to prevent the growth of bacteria, enhance the acidity and refreshing taste.
4. Dairy products
Lactic acid is an intrinsic ingredient in dairy products. It has a natural taste and good antibacterial effect. It is a popular dairy acidifier and pH regulator. Calcium lactate and ferric lactate, magnesium, zinc, etc. can be used to strengthen the minerals in milk and fermented milk beverages without affecting the flavor and taste of the product, and without protein precipitation.
5. Nutritional products and health foods
Calcium lactate, magnesium, zinc and iron can strengthen minerals in sports health drinks, juices, diet foods and baby products. They are water-soluble, moderate in taste, easy to be absorbed and utilized by the human body, can enhance human body function and enhance explosive power.
6. Pasta products
Lactic acid is a naturally fermented organic acid that gives bread a unique taste. Lactic acid can also synthesize sodium stearoyl lactylate and calcium stearoyl lactylate for use as an emulsifier in bread. Calcium lactate as a flour improver can improve raw materials, improve mechanical resistance, taste, and prevent aging. Buffered lactic acid also acts on the protein in the flour, which can make the gluten form a rich mesh structure, increase the volume, especially to make the taste better, prevent aging; also make the noodles elastic, increase the elasticity of the surface, and have smooth and transparent The appearance of the feeling, and can improve the taste and flavor.
7. Candy
Buffered lactic acid is a buffer system in which lactic acid and sodium lactate are mixed in a certain ratio. It has a mild sour taste. After adding buffered lactic acid to the candy, a lower sugar conversion rate can be obtained, thereby prolonging the shelf life; powdered lactic acid can make the appearance of the soft candy Better, greatly reduce the occurrence of surface moisture; sodium lactate can play a role in reducing sugar conversion and protecting the gel; calcium lactate can also be used in chewing gum to stabilize the colloid and adjust the pH, while calcium ions can prevent teeth The loss of minerals can achieve the effect of healthy teeth.
Medical field
Oral care
Sodium lactate is mainly used as an injection in the medical field. Its main function is to supplement body fluids and regulate the balance of electrolytes in the human body to relieve dehydration caused by diarrhea and poisoning caused by diabetes and gastritis.
2. Chiral intermediates
Lactic acid having an optical purity of 98% or more can be used as a starting synthetic raw material for chiral drugs. Lactic acid ester directly participates in the synthesis as an intermediate to improve efficacy.
3. Medical materials and drug release
Polylactic acid is a polycondensate of lactic acid, which is hydrolyzed into lactic acid in human tissues. Lactic acid is a metabolite of human body and can be further decomposed into carbon dioxide and water. Therefore, polylactic acid is non-toxic and has good degradability, and can be made into many different kinds. Medical materials for use, such as: degradable surgical sutures, fracture internal fixation, tissue repair materials, and filling materials for treating retinal detachment. In addition, since polylactic acid itself is metabolically safe and easy to form a film, it can be used as an ideal material for sustained drug delivery, and is widely used in a sustained release/controlled release system of a pharmaceutical.
4. Mineral strengthening
Lactate (calcium, iron, magnesium, zinc, etc.) has a high bioavailability and a good palatability, and can be used as a tablet or a powder as a deficiency for various minerals.
Industrial field
1. Electroless nickel plating complexing agent
Lactic acid has a unique complexation constant for nickel. More than 97% of the nickel ions in the electroless nickel plating solution of the lactic acid-nickel ion system are in the complex ion state, and the free nickel ion content is less than 3%. Therefore, lactic acid is commonly used for electroless nickel plating. One of the complexing agents. Compared with other complexing agents, lactic acid has strong stability in the plating solution, which can effectively control the deposition rate to ensure uniform and fine plating and stable plating solution. In addition, it is also very effective for suppressing the precipitation of nickel phosphite generated during the electroless nickel plating operation. Lactic acid has excellent synergistic ability, and can form binary or multi-component complexing agent with various complexing agents such as sodium citrate, malic acid and succinic acid, further satisfying the demand for complexing agent in the electroless nickel plating industry.
2. Paint and coating industry
Lactic acid is used as a pH adjuster and a synthetic agent in various water-based coating bonding systems. Such as: coating of electrodeposited materials. Methyl lactate and butyl lactate are synthetic agents for paints, coatings and resins, and butyl lactate is widely used as a brightener for painting and baking varnishes for automotive home appliances.
3. Tobacco
Lactic acid can maintain the humidity of tobacco, remove impurities in tobacco, change taste, neutralize nicotine nicotine, reduce harmful components and improve tobacco quality. Lactic acid can be used to synthesize L-lactate lactate, used as a flavoring agent for tobacco flavor. It has the function of shielding bitter and astringent taste, leaving a fresh sense of smoking in the mouth; potassium lactate is a commonly used coke-burning improver; magnesium lactate and calcium lactate can also be used as tobacco additives to improve gray gray matter.
4. Cleaning agent
Lactic acid ester is an excellent and safe high-boiling solvent with excellent solubility and unique solubility for grease and polymer soils, and has the best environmental and toxicological properties. A formulation that can be used alone or in addition to a cleaning solvent for degreasing and cleaning of a variety of precision machinery and cleaning prior to surface coating.
5. Tanning and textile industry
In the tanning industry, lactic acid removes the lime and calcium from the leather, making the leather soft and fine, resulting in high-grade leather. In the textile industry, lactic acid is used to treat fibers, making it easy to color, increasing gloss and making the touch soft.
6. Alcohol industry
Ethyl lactate is a colorless volatile liquid with special rum, fruit and creamy aromas. It is widely used as a flavoring agent for white wine and fruit wine.
