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 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 of cellulose xanthate?

The subscript "n" in the chemical formula indicates that many molecules chain together to make up the polymer. In this case, between 200 and 400 C₆H₇O₂ (OH)₂OCS₂Na molecules combine to make a molecule of cellulose xanthate.

What is sodium isopropyl xanthate?

Sodium Isopropyl Xanthate is an industrial chemical made up of the elements carbon, hydrogen, oxygen, sulfur, and sodium. Sodium Isopropyl Xanthate is also known as SIPX and its chemical formula is (CH3)2CHOCSSNa. It is a water soluble, pale yellow powder. ... Sodium Isopropyl Xanthate (SIPX).

How do you pronounce xanthate?

Phonetic spelling of xanthate

1. x-an-thate.
2. xan-thate. Jamal Dickens.
3. x-anthate. Vanessa Gray.

What are Xanthates, Xanthates Usage in Mining and How to Buy Xanthates?

39 related questions found

What is Xanthate Ester?

Xanthate usually refers to a salt with the formula ROCS ⁻₂M ⁺ (R = alkyl; M⁺ = Na⁺, K⁺), thus they are the metal-thioate/O-esters of dithiocarbonate. The name xanthates is derived from Greek ξανθός xanthos, meaning “yellowish, golden”, and indeed most xanthate salts are yellow.

What are Xanthates used for?

Xanthates are a group of chemicals typically used in sulphide flotation in mining applications.

In which of the following reaction xanthate is formed as an intermediate?

The Chugaev elimination is a chemical reaction that involves the elimination of water from alcohols to produce alkenes. The intermediate is a xanthate.

What is cellophane and rayon?

Cellulose xanthate is produced from the reaction of cellulose and carbon disulfide in the presence of sodium hydroxide. When it is neutralized with sulfuric acid it produces rayon and cellophane.

Who invented nitrocellulose?

The first practical smokeless powder made from nitrocellulose, for firearms and artillery ammunition, was invented by French chemist Paul Vieille in 1884. Jules Verne viewed the development of guncotton with optimism. He referred to the substance several times in his novels.

What is alkali cellulose?

: a compound of cellulose with an alkali (as sodium hydroxide) formed during the mercerization of cotton and as the first step in the manufacture of viscose and cellulose ethers.

What is the viscose process?

[′vis‚kōs ‚prä·səs] (chemical engineering) A process for the manufacture of rayon by treating cellulose with caustic soda, and with carbon disulfide to form cellulose xanthate, which is then dissolved in a weak caustic solution to form the viscose; fibers are used as silk substitutes.

Which reaction involves pyrolysis of xanthate Ester?

The formation of olefin(s) by the pyrolysis of xanthate esters is called the Chugaev reaction (for reviews, see ref. 1). The mechanism of this reaction has generally been agreed to involve a concerted six-membered cyclic transition state (2-5).

Which reactant is used in Chugaev reaction?

The reaction has been modified to react alcohol with 1 eq. NaOH or KOH and CS₂ in a neutral solvent (e.g., Et₂O, CCl₄) to form xanthate in one step, followed by the reaction with methyl iodide, which is less hazardous and more practicable.

What is Xanthic acid?

1a : a colorless unstable oily thio acid C₂H₅OCSSH obtained in the form of its potassium salt by reaction of potassium ethoxide with carbon disulfide; O-ethyl dithio-carbonate.

Is potassium amyl xanthate corrosive?

: Chemical of potassium alkyl xanthate in contact with water will emit carbon disulfide which is flammable. ... May form combustible dust concentrations in air. May release irritating, toxic and/or corrosive during fire or when heated to decomposition.

What is the role of sodium ethyl xanthate in froth flotation?

In froth floatation process, sodium ethyl xanthate is used as collector.

What does an ethyl group look like?

In chemistry, an ethyl group is an alkyl substituent derived from ethane (C₂H₆). It has the formula –CH₂CH₃ and is very often abbreviated Et.

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.

Which of the following activator is used in the flotation of sphalerite with xanthate at relatively high pH values?

As is known, the solubility of Zn-IBX is considerably higher than that of Zn (OH) 2 and therefore xanthate (KIBX) is not adsorbed on sphalerite [6]. Therefore, copper activation is essential for flotation of sphalerite. As is shown in Figs 3 and 4. Sphalerite can easily be activated with copper ions at pH 7.5.

How is alkali cellulose made?

Alkali cellulose is produced by cooking wood pulp in a Sodium hydroxide solution. Alkali cellulose is used as a precursor for many synthetic cellulose products such as Viscose rayon and Carboxymethyl cellulose.

What is viscose solution?

The solution obtained by dissolving cellulose xanthate in caustic soda, from which viscose filaments and cellophane are produced.

How is nitrocellulose made?

Nitrocellulose is made by treating cellulose with a mixture of sulfuric and nitric acids. This changes the hydroxyl groups (–OH) in the cellulose to nitro groups (–NO₃) as shown in Fig. 13.4. Nitrocellulose, also know as gun cotton and the main ingredient of smokeless gunpowder, decomposes explosively.