Organic Solvent

Formaldehyde is an important organic raw material, which is mainly used in plastic industry (such as phenolic resin, urea formaldehyde plastic electric jade), synthetic fiber (such as synthetic vinylon polyvinyl formal), leather industry, medicine, dyes, etc. Formalin has the ability of sterilization and antisepsis. It can soak biological samples. Its dilute solution (0.1-0.5%) can be used to soak seeds and disinfect seeds in agriculture. Catalytic oxidation is commonly used in industry to produce formaldehyde from methanol. Formaldehyde can react with silver ammonia solution to produce silver mirror, so that a thin layer of metallic silver as bright as a mirror is attached to the inner wall of the test tube (combined silver is reduced and formaldehyde is oxidized); It reacts with the newly prepared copper hydroxide suspension to form red precipitated cuprous oxide.

DMC is a cationic monomer, which can be homopolymerized or copolymerized with other monomers to prepare cationic polymer. The resulting polymer has strong polarity and affinity for anionic substances, so it can be widely used as cationic flocculant. It can be used in sludge dewatering process of sewage treatment plant and wastewater treatment in papermaking, coal flotation, printing, dye and other industries. In addition, DMC can also be used to produce acid resistant super absorbent resin, oilfield chemicals, fiber additives and other fine polymer products.

It is used for the determination of platinum, palladium, mercury and gold, as emulsifier and polymerization inhibitor.

Dimethylformamide is a good organic solvent and widely used. In petrochemical industry, dimethylformamide can be used as gas absorbent to separate and refine gas. As a washing and curing agent in polyurethane industry, it is mainly used in wet synthetic leather production; As a solvent in acrylic fiber industry, it is mainly used in dry spinning production of acrylic fiber; In the electronic industry as tinning parts of quenching and circuit board cleaning, etc; Other industries include carriers of dangerous gases, solvents for drug crystallization, adhesives, etc. In organic reactions, dimethylformamide is not only widely used as a solvent, but also an important intermediate in organic synthesis. It can be used to produce Chlordimeform in pesticide industry; In the pharmaceutical industry, it can be used for the synthesis of iodamine pyrimidine, doxycycline, cortisone, vitamin B6, iodoside, qupinjing, thiadiazine, n-formylsarcoma lysin, antineoplastic acid, methoxyaryl mustard, benazepril, cyclohexylnitrosourea, furafluorouracil, hemostatic acid, betamethasone, megestrol, danvita, chlorphenamine and sulfonamides. Dimethylformamide plays a catalytic role in hydrogenation, dehydrogenation, dehydration and dehydrohalogenation, which reduces the reaction temperature and improves the purity of the product.

N-propanol is directly used as solvent or synthesis of propyl acetate. In many cases, it can replace ethanol with low boiling point for coating solvent, printing ink, cosmetics, etc. It is used to produce n-propylamine, an intermediate of medicine and pesticide, feed additives, synthetic spices, etc. N-propanol is used in the pharmaceutical industry to produce probenecid, sodium valproate, erythromycin, dianjian'an, adhesive hemostatic agent BCA, propyl thiamine, dipropyl 2,5-pyridine dicarboxylic acid, etc; Various esters synthesized from n-propanol are used in food additives, plasticizers, spices and many other aspects. The derivatives of n-propanol, especially di-n-propylamine, are widely used in medicine and pesticide production. They are used to produce pesticides such as amisulfuron, bactericide, isoprotolin, metoclopramide, sulfrotolin, florol, etc.