Molecular formula : CH2O2
MW : No,
CAS production specimen-18-6
nature : colorless flammable liquid smoke, with the irritating odor. 8.4 ° C melting point. Boiling point of 100.7 ° C, 50 ° C (ERG). The relative density of 1.220 (20 / 4 ° C). Refractive index of 1.3714. Flash point (open cup) 69 ° C, 601 ° C spontaneous combustion point, surface tension 37.58mN / m (20 ° C), viscosity 1.784mPa s (20 ° C), 308 ° C critical temperature, critical pressure 7.04MPa. With water, ethanol, ethyl ether, glycerol arbitrary Compatibility slightly soluble in benzene. Showed strong acid, strong reducing agent. Heat to 160 ° C above break down into carbon dioxide and hydrogen. Together with concentrated sulfuric acid decomposition of carbon monoxide heating.
Preparation : 1. Sodium France carbon monoxide and sodium hydroxide solution at 160-200 ° C and atmospheric pressure Sodium produced by the reaction and then sulfuric acid solution, distillation derived products. 2. Methanol carbonylation Act (also known as methyl formate) methanol and carbon monoxide catalyst for methanol in the presence of sodium reaction, methyl formate production, and then generated by the hydrolysis of methanol and formic acid. Methanol can be recycled into methyl formate reactor, then formic acid can be obtained by the distillation of products with different specifications. 3. Formamide France carbon monoxide and ammonia solution in methanol produced by the reaction formamide, and in the presence of sulfuric acid in acid hydrolysis, by-product ammonium sulfate. The consumption of raw materials fixed : methanol 31kg / t, carbon monoxide 702kg / t, ammonia 314kg / t, sulfuric 1010kg / t. In addition, the hollow of a tree oil butane oxidation mainly used in the production of acetic acid, formic acid as a by-product recovery, in the stage of studying the methods of carbon monoxide and water direct synthesis.
purposes : formic acid is a basic organic chemicals, widely used pesticide, leather, textiles, dyeing, pharmaceutical and rubber industries, the system can take various solvents, plasticizers, rubber coagulant, animal feed additives and new technology, such as synthetic insulin. China's acid consumption, the pharmaceutical industry accounted for about 45%, the chemical industry accounted for about 30%, light industry, textile and other sectors account for about 25%. Formic acid is an important one export of chemical products. At present, China's production of the use of formic acid Sodium law. Formic acid used in cheap, volatile and less corrosive acid inorganic substitutes, which are widely used light industries. In the textile and dyeing industry, formic acid to India for eliminating Cozaar nitrate Act of nitrite gas agents, dyes acidic and neutral complex dyeing auxiliaries and nylon with the reactive dyes help. Acid not dyeing process residue in the fabric, the more acidic acid-, interleukin 6 can restore chromium, chromium in the process with the media to raise the utilization rate of dye. Instead of using formic acid sulfate cellulose degradation can be avoided, but moderate acidity, staining both practices, it is a good help dyes. Formic acid inorganic acid as a substitute for the tanning of bleaching, shed, and lime and wet leather to prevent mildew. Formic acid is used as coagulant can be made of high-quality natural rubber, lower production costs, and can also be used for scrap rubber regeneration. Formic acid is used to produce feed additives, in silage have great potential. Formic acid inhibit or prevent the growth of mold function of feed change the form of natural fermentation, and often fatty acid added to enhance the anti-mycotic effect. Formic acid is used to deal with the green fodder feeding cows to prevent winter milk production, fattening results have improved markedly. In the food industry, formic acid wine industry for disinfection, preservation, canned for cleaning disinfectants, juice and food preservation agent. Formic acid derivatives are a lot of medicine, pesticides, dyes, spices, solvents intermediates for the manufacture of borneol, aminophyrine, caffeine, vitamin B1, analgin, chlordimeform, triadimefon, tricyclazole, dimethyl formamide, etc.. Formic acid derivatives to replace the formamide and formic acid esters in more industrial application (formamide derivatives see the goods entry). Formic acid esters in the spice industry uses very broad, such as : Ethyl -- peach, strawberry and other fruit flavors; Formic acid Isoamyl -- Fruit Flavor, leather flavor; Formic acid ester has -- apple flavors; Formic acid ester G -- apricot, prune and peach fruit flavors; Formic acid is FD -- Nerol Flavor and Iris oil; Benzyl -- Advances such as soap and the scent flavor; formic acid ester GUI -- Advances under the incense and on the other flavor; citronella formic acid ester -- for roses, osmanthus monocrotaline other flavors; syringic acid ester -- for such carnations Flavor ; Wong Chuk Hang formic acid ester -- Rose, Nerol, geraniol and other flavors; formic acid ester Linalyl -- lavender, aromatic lemon flavor; formic acid ester menthol -- Cosmetics Fragrance, Flavor Spray; Acid Ethyl -- white roses, orchids, chrysanthemums and other flavors; Acid 100 li Xiang ester -- cosmetics spices.
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