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Application of Hydrazine

As an important fine chemical raw material, hydrazine hydrate is mainly used to synthesize AC, D1PA, TSH and other foaming agents; it is also used as a cleaning agent for deoxygenation and carbon dioxide removal in boilers and reactors; it is used in the pharmaceutical industry to produce Tuberculosis and anti-diabetic drugs; used in the pesticide industry to produce herbicides, plant growth regulators, and sterilization, insecticide, and rodenticide; in addition, it can also be used to produce rocket fuel, diazo fuel, rubber additives, etc. Since 2013, the application field of hydrazine hydrate has continued to expand. Hydrazine hydrate and its derivatives are widely used in many industrial applications, such as chemical products, pharmaceutical products, agrochemical products, water treatment, photographic and photographic products, etc., as reducing agents and antioxidants, and used to prepare medicines , Foaming agent, etc. [1] Hydrazine hydrate can be used directly as: 1. Used as an anti-corrosion additive for circulating water in thermal power plants and nuclear power plants. 2. Deoxidizer for water in industrial boilers and high-pressure steam furnaces. Hydrazine hydrate is a kind of deoxidizer, which can reduce the dissolved oxygen in the water, and is used to further remove the residual trace dissolved oxygen after the boiler feed water is thermally deoxygenated. Because dissolved oxygen in the feed water will cause corrosion of the boiler tube wall. Adding hydrazine hydrate to the boiler feed water can not only deoxidize, but also prevent the formation of iron scale and copper scale in the boiler. Hydrazine hydrate is an efficient reducing agent, which can synthesize the following products: 1. Blowing agent: Azoformamide (carbazamide) (such as sodium azide products used in the production of inner tubes). 2. The synthesis of biologically active intermediates in agrochemical and pharmaceutical products requires the formation of triazole. 3. Azo initiator 4. Various other products: some specific organic pigment products for dyes, reagents for photography, urethane and acrylic products, and cyanobromic acid products. Hydrazine hydrate can also be used in the following fields: 1. Cleaning and refining of precious metals. 2. Metal recovery from pickling liquid and surface treatment liquid. 3. Dispose of waste liquid and waste gas. 4. Purification of various grades of refined sulfuric acid used in the electronic market. 5. Metal inlay of plastics and metals (nickel, cobalt, iron, chromium, etc.). 6. It is a formula product of rocket fuel. 7. Used in the ACTIRED process, which is mainly used in gold ore beneficiation. Because hydrazine hydrate has bifunctional groups and nucleophilic groups, it can produce a variety of derivative products, such as: 1. LIOZAN: anti-corrosion product, can provide fast deoxygenation ability, and can take effect at lower temperature. 2. Hydrazine salt: 3 kinds of products, mainly used in the synthesis of intermediates (especially in the pharmaceutical industry). 3. Triazole products: 1,2,4-triazole/1,2,4-triazole sodium salt/4-amino-1,2,4-triazole/3-amino-1,2,4-triazole Azole. 4. Aminoguanidine bicarbonate. 5. New polymer initiators, such as the company's liquid azo compound products. Hydrazine hydrate is a strong reducing agent, and it is a raw material for medicines, pesticides, dyes, foaming agents, imaging agents, and antioxidants; it is widely used as a deoxidizer for large-scale boiler water; it is also used to make high-purity metals, synthetic fibers, and rare Separation of elements. In addition, it is also used to make rocket materials and explosives. Also used as an analytical reagent. Most of the hydrazine derivatives used as blowing agents are azodicarbonamide (AC), as well as hydrazine tosylate and so on. Used as a pharmaceutical derivative, the most abundant hydrazine are isoniazid, fenylthiourea and benzenesulfonyl thiourea, as well as antipsychotics 1-isonicotinyl-2-isopropylhydrazine and anticancer drugs Aldehydrazine derivatives, anti-infective 5-nitrofuran methyl hydrazine derivatives, antibiotics oxazoline cephalosporins, diuretic antihypertensive drugs hydralazine, anti-tumor drugs methyl phenylhydrazine, etc. Hydrazine derivatives used as pesticides include plant growth regulator maleic hydrazide derivatives, rodenticide nitrophenyl hydrazine, insecticide pyrazole derivatives and 5-nitrofuran thiosemicarbazide, weeding Agents such as aminotriazole. In Japan, more than one-third of the distribution of hydrazine is used as a deoxidizer for boiler water. The hydrazine (including hydrazine hydrate and hydrazine sulfate) used as a foaming agent accounts for about 30%, and that for Mongolian medicine accounts for 10%. Packaging, storage and transportation

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