Specific USES of oxalic acid:
Complexing agent, masking agent, precipitation agent, reducing agent.In the analysis, beryllium, calcium, chromium, gold, manganese, strontium, thorium and other metal ions were examined and measured.Microcrystalline analysis examined sodium and other elements.Precipitation of calcium, magnesium, thorium and rare earth elements.Calibrate standard solutions for potassium permanganate and cerium sulfate solutions.Bleach.To dye.Can also be used to remove the rust on the clothing building industry in front of the coating on the exterior wall, because of the strong alkaline metope should be coated with oxalic acid in addition to alkali.
The pharmaceutical industry is used to manufacture drugs such as aureomycin, oxytetracycline, streptomycin, borneol, vitamin B12, phenobarbital, etc.Printing and dyeing industry as color aid, bleaching agent, pharmaceutical intermediates.The plastics industry is used for the production of polyvinyl chloride, amino plastics, urea formaldehyde plastics.[3]
As a catalyst for the synthesis of phenolic resin, the catalytic reaction is mild, the process is smooth and the duration is the longest.Oxalate acetone solution can catalyze curing reaction of epoxy resin and shorten curing time.Also used for the synthesis of urea formaldehyde resin, melamine formaldehyde resin pH value regulator.The drying speed and bonding strength can also be improved by adding the water-soluble adhesive of pva.Also used as curing agent of urea-formaldehyde resin, metal ion chelating agent.It can be used as KMnO4 oxidant to prepare starch adhesive, which can accelerate the oxidation rate and shorten the reaction time.
As a bleach
Oxalic acid is mainly used as a reducing agent and bleaching agent, for the production of antibiotics and borneol and other drugs, as well as the extraction of rare metals solvents, dye reducing agents, tanning agents.
Oxalic acid can also be used in the production of cobalt-molybdenum-aluminum catalysts, the cleaning of metals and marbles and the bleaching of textiles.
Used for metal surface cleaning and treatment, rare earth element extraction, textile printing and dyeing, leather processing, catalyst preparation, etc.
As a reducing agent
In the organic synthesis industry, it is mainly used to produce hydroquinone, pentaerythritol, cobalt oxalate, nickel oxalate, gallic acid and other chemical products.
Plastic industry is used to produce PVC, amino plastics, urea formaldehyde plastics, paint, etc.
The dyestuff industry is used to manufacture the salt base magenta etc.
Printing and dyeing industry can replace acetic acid, used as pigment dye coloring agent, bleaching agent.
The pharmaceutical industry is used for the manufacture of aureomycin, oxytetracycline, streptomycin and ephedrine.
In addition, oxalic acid can also be used for the synthesis of various oxalates, oxalates and oxalamide products, and oxalate diethyl oxalate and sodium oxalate, calcium oxalate and other products to produce the largest.
As a mordant
Antimony oxalate can be used as a mordant. Ammonium ferric oxalate is a reagent for printing blueprints.
Scaling function
Oxalic acid can be used to remove rust.Be careful, though, as oxalic acid is highly corrosive to stainless steel.High concentrations of oxalic acid can also corrode hands.And the acid oxalate produced has a high solubility, but some toxicity.When using, do not eat or drink.Skin contact with oxalic acid, should be promptly washed with water.
methods
Buy a bottle of oxalic acid from a chemical store, take some, mix it with warm water, and rub it over the rust.Then rub with metallographic sandpaper and finally spray paint.Oxalic acid stores also sell medical equipment, glass instruments.