What extinguishing media must be used for a liquid xanthate fire?
Suitable extinguishing media : Dry chemicals, carbon dioxide (CO2). Flood the area with water. Unsuitable extinguishing media : Do not use direct water jet. : Chemical of sodium alkyl xanthate in contact with water will emit carbon disulfide which is flammable.
Is xanthate corrosive?
For transport and storage purposes, solid xanthate is classified as class 4.2 (spontaneously combustible) under UN 3342 PGII, and for liquid mixtures it is classified as class 8 (corrosive) sub-risk 6.1 (toxic) under UN 2922. Xanthates are also a scheduled material for major hazard facilities.
What are Xanthates used for?
Xanthates are a group of chemicals typically used in sulphide flotation in mining applications.
What is Xanthate made of?
xanthate, any of a class of organic salts formed by treatment of an alcohol with carbon disulfide in the presence of an alkali.
What is Xanthate process?
Xanthate salts are produced by the treatment of an alcohol, alkali, and carbon disulfide. The process is called xanthation. In chemical terminology, the alkali reacts with the alcohol to produce an alkoxide, which is the nucleophile that adds to the electrophilic carbon center in CS2.
How do you make Xanthate?
What is xanthate chemistry?
Xanthate, any of a class of organic salts formed by treatment of an alcohol with carbon disulfide in the presence of an alkali.
How do you make xanthate?
How do you make cellulose with xanthate?
Cellulose xanthate is prepared by first immersing cellulose pulp in aqueous sodium hydroxide to convert to alkali cellulose. The alkali cellulose is then depolymerized to control the alkali cellulose degree of polymerization prior to xanthation in carbon disulfide.
What is the chemical formula for Potassium amyl xanthate?
Potassium amyl xanthate. Potassium amyl xanthate is an organosulfur compound with the chemical formula CH 3 (CH 2) 4 OCS 2 K. It is a pale yellow powder or pellet with a pungent odor, soluble in water. It is widely used in the mining industry for the separation of ores using the flotation process.
How is Potassium amyl xanthate used in mining?
It is widely used in the mining industry for the separation of ores using the flotation process. Potassium amyl xanthate is prepared by reacting n-amyl alcohol with carbon disulfide and potassium hydroxide.
How does Potassium amyl xanthate work in a flotation cell?
The xanthates cause the minerals to attach themselves to air bubbles and then float to the top of the flotation cell. As values reach the surface, the bubbles form a froth that overflows into a trough for collection. The residual may be re-used for additional recovery or removed for disposal. Most of the xanthate is consumed in the process.
What are the names of the four xanthates?
Four types of xanthates (ethyl, butyl, propyl and amyl) are produced in various combinations with sodium and potassium, which are stabilizers in the chemical formula. The key reagent is carbon disulphide.