Cas: 583-39-1
Name: 2-Mercaptobenzimidazole,Nocrac MB;AOMB;2,3-dihydro-1H-benzimidazole-2-thione;2H-Benzimidazole-2-thione, 1,3-dihydro-;asmmb;Antigen MB;2,3-dihydro-2- benzimidazolethione;1,3-dihydro-2H-benzimidazole-2-thione;Vulkanox;USAF xf-21;
Brand:
sinograceitem no.:
FC-038Payment:
L/C、D/A、D/P、T/T、MoneyGram、Paypal other.product origin:
China AnhuiColor:
yellow or white crystalsshipping port:
Shanghai and other portsLead Time：
15-25 DaysBasic Information
Cas: 583-39-1
Name: 2-Mercaptobenzimidazole,Nocrac MB;AOMB;2,3-dihydro-1H-benzimidazole-2-thione;2H-Benzimidazole-2-thione, 1,3-dihydro-;asmmb;Antigen MB;2,3-dihydro-2- benzimidazolethione;1,3-dihydro-2H-benzimidazole-2-thione;Vulkanox;USAF xf-21;
Physical index
Appearance and traits: yellow or white crystals
Security Information
RTECS number: DE1050000
Production methods and application
production method
1. Preparation of o-nitroaniline. The molten o-nitrochlorobenzene was sucked into the autoclave, and 28% ammonia was added, and the temperature was increased to 170～175℃ in a sealed airtight. The reaction was stirred for 7h, and the pressure was 3.5～4MPa. After the reaction is over, the ammonia is released to relieve the pressure, and the ammonia gas is cooled and absorbed to make ammonia water for recycling. When the temperature in the kettle drops to 100°C, the remaining pressure is used to press the reactants in the kettle into 1000L of water that has been prepared in the precipitation tank. Cool to below 30°C, filter, and wash the filter cake with a small amount of cold water to obtain o-nitroaniline. The yield is 95%～96%. 2. Preparation of antioxidant MB. Add o-nitroaniline and 21% sodium sulfide solution in the reduction tank, heat up to 90℃, then heat up to 105～110℃ in a sealed airtight, pressure rise to 0.1～0.2MPa, stir and reduce for 5h After cooling to below 30℃, carbon disulfide is added for reaction, and the temperature is kept at about 40℃. After a few hours of reaction, the temperature is raised to recover carbon disulfide. Then put in an appropriate amount of sodium bicarbonate solution, add activated carbon to decolorize and filter, the filtrate is acidified with dilute hydrochloric acid or dilute sulfuric acid, and 2-mercaptobenzimidazole is precipitated as a solid. After centrifugal separation, washing, drying and crushing, the finished product is obtained. 3. Add 64kg of o-phenylenediamine, 18kg of potassium hydroxide, and 52kg of carbon disulfide to the reaction kettle in sequence. Start stirring, then add 480kg of alcohol and 190kg of distilled water to slowly heat to dissolve, then continue to heat to reflux for 3h. Cool down, add 24kg activated carbon and reflux for 20min after stopping boiling to decolorize. Then filter to remove the activated carbon. The filtrate is put into a crystallization tank, heated to 60～70℃, and 300 parts of water are heated. Add acetic acid aqueous solution (30%～32%) under stirring to complete the crystallization. After centrifugal filtration, the crystals were collected and dried at 40 ℃ to obtain the finished product. The reaction formula is as follows:Previous:
Sodium 3-nitrobenzenesulphonate（CAS 127-68-4）FC-039Next:
2-Mercaptothiazoline（CAS 96-53-7）FC-037
sinograce chemical
Sinograce Chemical is professional technical enterprise providing solutions of surface materials and manufacturing of raw materials. Sinograce Chemical Company is composed of R&D center, Manufacture center, Quality control department, Market center and International trade department. We have been dedicating to research on excellent paint/coating, adhesive for over 15 years. And now still conti...
Room 1013, Building A5, Financial Port Center, Yangzijiang Road, Baohe District, Hefei City， Anhui province, China
+86 0551 63459511
Copyright © 2015-2024 Anhui Sinograce Chemical Co., Ltd..All Rights Reserved.powered by dyyseo.com
top
English
français
русский
español
العربية
