Oxalic acid also has reducing properties, and oxidants can easily be oxidized to carbon dioxide and water, neutralize alkalis and generate oxalates. Oxalic acid is widely used in the chemical industry for the manufacture of pentaerythritol, cobalt oxalate, nickel oxalate, alkaline green, steel, soil analysis kits, chemical reagents. Oxalic acid also has two major applications in printing and dyeing. Xiao Bian talked with you briefly today. Iron is affected by oxygen and water in the atmosphere, creating a complex compound called rust. The composition of rust differs depending on the conditions at which it was produced, but iron rust contains trivalent iron ions. The rust stains on the cotton fabric form a defect and must be removed. Oxalic acid is a practical agent for washing rust stains on cotton cloth. The principle is roughly oxalic acid and ferric ion Fe + + + to produce iron oxalate anion chromate [F (C2O4) 3] ---, this anion complex soluble in water, so the rust can be washed with oxalic acid. The amount of oxalic acid was 20 g soar and about 30 ml of acetic acid (98%) was soared. Oxalic acid can easily damage the fiber. After the cotton cloth is treated with oxalic acid , the oxalic acid remaining on the cotton fiber must be thoroughly washed with water. If you do not wash, when the cotton cloth is dried, dilute oxalic acid solution becomes concentrated acid, it will seriously damage the fiber, resulting in a hole, must pay attention. Rust spots on nylon fabrics can cause fabric yellowing and can also be removed with oxalic acid. When direct printing with narafol dye by the method of sodium nitrite and dyestuff, the nitrous acid is generated when sulfuric acid is formed, so that the sodium salt of naproxen AS on the cloth is precipitated into a reddish-brown color, resulting in whiteness. . In order to eliminate nitrous acid, 1-2 g of oxalic acid is sometimes added to the sulfuric acid developing solution to replace reducing agents such as formic acid, urea, or sulfhydryl, and the nitrous acid is reduced to nitrogen to prevent HNO2 from causing the AS to become brown. Easy Care Shirts,Easy Care Plain Fabric Shirts,Men'S Easy - Care Shirts,Autumn Men'S Easy Care Shirts Shaoxing Moonten Trade Co., Ltd , https://www.sxmoonten.com
I. To remove rust stains on fabrics
II. Nitrite gas to eliminate the coloration of Indomethacin dye
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Oxalic acid is a dicarboxylic acid of organic acids and one of the strong acids in organic acids.