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Caustic Soda Flakes 92% (Taiwan Origin)

Caustic Soda Flakes 92% (Taiwan Origin)
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Country Origin : Taiwan Appearence : White Flakes
CAS No. : 1310-73-2 H.S. Code : 2815110000
Formula : NaOH Common Names : Caustic Soda
IUPAC Name : Sodium Hydroxide
Packaging : 1000 @ 25 kg PP/PE bags, 25 MT / 20'FCL
  • Description
  • Application
Brief Overview

 

Sodium hydroxide, otherwise called Caustic Soda, is an inorganic chemical compound with chemical formula NaOH. It is called caustic soda because it is highly corrosive in nature. Caustic Soda flakes are white and highly caustic. It is a strong base and is soluble in water, ethanol and methanol. It readily absorbs water (hygroscopic) and carbon di oxide from the air. It is also a strong electrolyte, and although it is not volatile, it can rise easily in air as an aerosol. Dissolution of solid caustic soda in water in highly exothermic.

 

Manufacturing Process

 

Solid caustic soda is manufactured by evaporation of water from liquid caustic soda and then solidification into the required shape. Liquid caustic soda is first manufactured by various processes such as the electrolysis of sodium hydroxide - technical grade, the Chloralkali process which is the electrolysis of sodium chloride, or the ammonia-soda process which is the reaction of brine and limestone.

Applications:

Paper and Pulp Industry

It is used in the treatment of wood. Both sulphite and sulphate pulps are purified by removing lignin compounds in the caustic extraction stages of the multistage bleach plants. In some paper kraft mills, caustic soda is also used as a make-up chemical. It is also used in the initial treatment of deinking secondary fibres.

 

Textile Industry

Caustic soda is used in scouring, bleaching, de-sizing, lustring and mercerizing. It is mainly used in processing of cotton and for dyeing synthetic fibres such as nylon and polyester.

 

Detergent Industry

Caustic soda saponifies fats into water soluble sodium based soaps. It saponifies fats into water soluble sodium-based soaps. In detergent industry it is also used in the manufacturing of anionic surfactants.

 

Petrochemical Industry

Caustic soda is used for the refining of petroleum products. It is used as an absorbent for carbon dioxide in light petroleum fractions, for sulphides in the purification of various fractions, and with chlorine, for hypochlorite sweetening, a treatment step which involves the removal of various sulphur compounds.  

 

Metallurgy Industry

It is used in the refining of bauxite ores to produce alumina by precipitation, which is the raw material for the production of aluminium metal. It is also used as an etchant in the finishing and chemical milling of aluminium products.

Other Applications

Caustic soda is also used in the production of renewable fuels, by being used for pH adjustment and formation of in situ sodium methylate in bioethanol and biodiesel processing. It is also used in water treatment.