Model No.: CAS NO 583-39-1
MP:: 300-304 °C(lit.)
Packaging: according to your request
Productivity: 100000kg per month
Place of Origin: Shandong, China (Mainland)
Supply Ability: in stock
Certificate: ISO CE
HS Code: 583-39-1
Good quality 2-Mercaptobenzimidazole CAS 583-39-1
1. Preparation of o-Nitroaniline The molten o-nitrochlorobenzene was sucked into the autoclave, and then 28% of ammonia water was added. The temperature was increased to 170-175° C., and the reaction was stirred for 7 hours. The pressure was 3.5-4 MPa. After the completion of the reaction, ammonia is released and pressure is reduced, and ammonia is cooled and absorbed to produce ammonia water for recycling. When the temperature in the autoclave drops to 100°C, the pressure in the autoclave is reduced to 1000 liters of water prepared in the coagulation tank by using the residual pressure. Cooled to below 30 °C, filtered, filter cake washed with a small amount of cold water, namely o-nitroaniline. The yield is 95% to 96%.
2. Preparation of antioxidant MB In the reduction tank, add o-nitroaniline and 21% sodium sulfide solution, raise the temperature to 90 °C, and then seal the temperature to 105 ~ 110 °C, the pressure is self-elevation to 0.1 ~ 0.2MPa, stirring and reduction 5h After cooling to below 30°C, carbon disulfide was added to carry out the reaction. The temperature was kept at about 40°C. After a few hours of reaction, the temperature was raised to recover carbon disulfide. Then put a proper amount of sodium bicarbonate solution, add activated carbon to decolorize and filter, the filtrate is acidified with dilute hydrochloric acid or dilute sulfuric acid, 2-mercaptobenzimidazole is precipitated as solid. After centrifugation, washing, drying and crushing, the finished product is obtained.
3. 64 kg of o-phenylenediamine, 18 kg of potassium hydroxide, and 52 kg of carbon disulfide were sequentially added to the reactor. The stirring was started, 480 kg of alcohol was added, and 190 kg of distilled water was slowly heated to dissolve it, followed by heating and refluxing for 3 h. Cooling, stop boiling, add 24kg activated carbon reflux for 20min, decolorize. Then the activated carbon was removed by filtration. The filtrate was placed in a crystallization bath, heated to 60-70°C, and heated to 300 parts. Aqueous acetic acid (30% to 32%) was added with stirring to complete the crystallization. Centrifugal filtration, collecting crystals in 4…
The product is used as an antioxidant for natural rubber, diene synthetic rubber and latex, and also for polyethylene. It is a so-called secondary antioxidant that can be used in combination with other antioxidants (such as DNP, AP, and other non-polluting antioxidants) to achieve significant synergistic effects. The product is easy to disperse in rubber and does not change color under sunlight. Slightly polluting. When used alone, the amount is 1-1.5 parts. When the amount is more than 2 parts, the frost phenomenon will occur. The amount used in the latex foam rubber is 0.5-1 parts, and the amount used in the transparent rubber product is 0.5 parts. Because this product is bitter, it should not be used in rubber products that come in contact with food. 2-Mercaptobenzimidazole is a new drug against leprosy in medicine. Its toxicity is lower than that of sulfone, but its efficacy is also at the end. It can produce drug resistance without accumulation effect. Can be used in patients who do not apply sulfone drugs. The 2-mercaptoimidazolium alkali metal salt aqueous solution reacts with the water-soluble zinc salt solution to obtain the 2-mercaptobenzimidazole zinc salt, namely the antioxidant MBZ (C14H10N4S2Zn). The product is non-toxic.
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2.Competitive price .
3.Correct delivery time promise.
4.Continuous improvement make sure the long-term cooperation.
5.Honest service for your whole sourcing process
1.Cooperate with research institutions, we strictly control the process from raw material to finished product.
2.The customer comes first, we provide reasonable price, high quality product and prompt shipment.
3.We can send the goods to your delivery address directly. It is relatively safe and fast. We have ready goods in stock.
4.Quick and clear response to customers questions.
5.Warm after sale service, we will help to solve the problems in your usage.
5.We could make our price discount if you place a substantial order with us.
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