爱就去xxoo777.com_男人打飞出精视频无码_婷婷视频在线_欧美激情免费看_性xx视频_日本美女性生活视频

Welcome to Ningxia Taikang Pharmaceutical Co., Ltd. website!
Service Tel

Foreign Trade:18995223366 Domestic Trade:18995262626

Hot keywords:Calcium Carbide Calcium Cyanamide Dicyandiamide Electronic grade Dicyandiamide Cyanamide
Position: Home > Products
Dicyandiamide

Product name: Dicyandiamide

Molecular formula: C2H4N4

Structural Formula: 

CAS: 461-58-5

Molecular weight: 84.08

 

Dicyandiamide is a dimer of cyanamide and a cyano derivative of guanidine. White crystalline powder, soluble in water, alcohol, ethylene glycol and dimethylformamide, practically insoluble in ether and benzene. Nonflammable. Stable when dry. 
 

The main uses are: (1) as a guanidine salt, melamine raw materials. By reacting Dicyandiamide with an acid, various guanidine salts can be prepared. Phenylmelamine, obtained by the reaction of Dicyandiamide and phenyl nitrile, is an intermediate for coatings, laminates and molding powders. (2) As a dye fixing agent, Dicyandiamide resin prepared by the reaction of Dicyandiamide and formaldehyde can be used as a dye fixing agent. (3) Dicyandiamide fertilizer, Dicyandiamide compound fertilizer can control the activity of nitrifying Chemicalbook bacteria, adjust the conversion rate of nitrogen fertilizer in soil, reduce nitrogen loss and improve fertilizer use efficiency. (4) as a fine chemical intermediate. In medicine for the preparation of guanidine nitrate, sulfonamides and other drugs; Also used to produce thiourea, nitrocellulose stabilizer, rubber vulcanization accelerator, steel surface hardener, artificial leather filler, adhesives and so on. 5-azacytosine, a medical intermediate, can be obtained by the reaction of Dicyandiamide and formic acid. Dicyandiamide products have a wide market.


Product Process:

Water or mother liquor is pumped into a stirring tank, ground by lime nitrogen, quantitatively and uniformly added into a slurry preparation tank for full stirring, so that the lime nitrogen is completely hydrolyzed to generate cyanamide calcium liquid, and then the hydrolysate is sent into a carbonization tower by a slurry pump, and completely contacts and reacts with carbon dioxide gas (kiln gas) which enters the carbonization tower after being compressed from a lime kiln, so as to complete the decalcification process of the lime nitrogen aqueous solution. adding the feed liquid after the hydrolysis decalcification reaction is completed into a belt filter to filter out impurities of hydrolysis and carbonization in the lime nitrogen and calcium carbonate solid generated in the carbonization process to obtain pure Cyanamide solution; the Cyanamide aqueous solution is pour into a polymerization kettle, heated to 70 DEG C by steam, and that PH value is adjust to about 10 to complete the polymerization process and generate Dicyandiamide. then putting the Dicyandiamide aqueous solution into a suction filter barrel, filtering out impurities such as lime and the like generated in the polymerization process, and then filtering the Dicyandiamide aqueous solution by a diatomite filter to obtain a pure Dicyandiamide solution; pouring the pure Dicyandiamide solution into a crystallizing pot, cooling and crystallizing the Dicyandiamide aqueous solution with low temperature water from a freezing station, and precipitating Dicyandiamide solid in the solution; discharging the solution in the crystallization pot, filtering by a suction filter barrel, wherein the Dicyandiamide crystal is dried by a centrifugal machine, and then is dried by a fluidized bed dryer to obtain a Dicyandiamide finished product; The filtered Dicyandiamide mother liquor is sent to the slurry preparation tank for hydrolysis of lime nitrogen to complete the closed circulation of the process system. 

The purity of qualified Dicyandiamide is more than 99.5%.

 

Contact us

Contact:

Foreign Trade:18995223366 Domestic Trade:18995262626
                  
Email: E-mail;sales1@nxdadi.com
Address: Shizuishan Ecological Economic Development Zone, Pingluo County, Shizuishan City, Ningxia Hui Autonomous Region, China

Copyright(C)2023, Ningxia Taikang Pharmaceutical Co., Ltd. All Rights Reserved. Supported by  ChemNet ChinaChemNet Toocle?

- Sincerely serve you -

Submit your request and we will call you back in time

主站蜘蛛池模板: 国产精品女人网站 | 天海翼久久久中文字幕乱码 | 欧美日韩视频无码一区二区三 | 婷婷亚洲一区二区三区 | 欧美 亚洲 一区 | 日韩精品免费在线视频 | 一级片影视 | 阿娇囗交全套码在线观看 | 极品一区 | 蜜臀天堂 | 好男人神马影院 | 免费尻逼视频 | 国内国内在线自偷第68页 | 在线观看国产高清视频 | 中国av一级片 | gogogo高清免费 | 亚洲精欧美一区二区精品 | 免费观看黄做爰 | 北条麻妃国产九九九精品小说 | 无码人妻丝袜在线视频 | 毛片黄片视频 | 国产天堂精品 | 疯狂揉小核到失禁喷水h视频 | 亚洲中文字幕久久精品蜜桃 | 今高清视频免费播放 | 精品视频一区二区 | 久久久亚洲欧洲日产国码二区 | 亚洲综合一页 | 九九精品视频在线观看 | 欧美viboss高清 | 4hu最新网| 成人乱码免费视频A片含羞草传媒 | 黄色香蕉网 | 亚洲∧V久久久无码精品 | 在线看免费观看av | 男人扒开女人腿桶到爽免费 | 无码欧美一区二区三区 | 视频一区二区中文字幕日韩 | 韩国精品一区二区三区四区 | 久久久久av69精品 | 国产原创三级 |