welcome,guest
Negotiable
The date of payment from buyers deliver within days
Ningxia
Long-term effective
2023-06-09 21:46
331
Company Profile
By certification [File Integrity]
Contact: nxxmhg(Mr.)
Email: 
Telephone: 
Phone: 
Area: Ningxia
Address: Ningxia
Website: http://www.cyanamidexm.com/ http://nxxmhg.yinchangsh.com/
Front Solid Sway Bar
unit price:Negotiable
600puffs Transparent Square Tube Vape
unit price:Negotiable
Transparent Medical Disposable Glass Cartridge
unit price:Negotiable
Micro Ring Human Hair Extensions
unit price:Negotiable
Heated Scarf with Cotton Material
unit price:Negotiable
Unisex Look Heated Hat
unit price:Negotiable
Monocyanamide can be prepared by using lime nitrogen (CaCN2) as raw material and interacting with sulfuric acid. Put water in the reaction kettle, cool with ice brine, add lime nitrogen, keep the temperature between 0 ～ 15 ℃, add 5% sulfuric acid solution dropwise, adjust pH = 6, keep for 20min, filter, wash with water, then return to the reaction kettle Then, add lime nitrogen and repeat the above operation twice, and the obtained filtrate is concentrated by a film to maintain a certain temperature. After concentration, the content reaches 50% to 55% to obtain a 50% cyanamide solution. Reaction equation:CaCN2 +H20 + H2S04 NH2 CN + CaS04
It can also be prepared by reacting calcium cyanamide with carbon dioxide and water,
CaCN2 +H20 + C02 —+ H2 NCN + CaC03
Â
http://www.cyanamidexm.com/
