By: Atul

CARBOXYL METHYL CELLULOSE

Please keep calm

CMCIntroduction:

Carboxymethyl cellulose (CMC) or cellulose gum is a cellulose

derivative with carboxymethyl groups (-CH2-COOH) bound to some

of the hydroxyl groups of the glucopyranose  monomers  that make

up the cellulose backbone. It is often used as its sodium salt, sodium

carboxymethyl cellulose.

https://en.wikipedia.org/wiki/Carboxymethyl_cellulose

PREPARATION

Produced by reaction between monochloroacetic-acid(MCA) (about 70% solution of ehanol) with alkali cellulose.

Alkalization of the cellulose and etherification of the alkali-cellulose with MCA takes place in the presence of an organic solvent.

PROCESS DESCRIPTION:

Tank Form: Here all the liquid raw materials introduced into the process are stored and prepared. Likewise the dosing is effected from here according to the respective formula.

Cellulose preparation: Here the cellulose raw material delivered in sheets is ground, stored and dosed.

Production line for technical CMC:(a)Reaction and stripping unit.(b)Drying unit.(c) Milling and screening unit.(d)Blending unit.(e)Weighing and Packing unit.

Production line for purified CMC:(a)Reaction unit(b)Washing and extraction unit.(c)Alcohol stripping and recovery unit.(d)Drying unit.(e)Milling and screening unit.(f)Blending unit.(g)Weighing and packing unit.

Utilities:Here, the supply of steam, cooling water (32◦C), chilled water(5 ◦C), compressed air and process water are prepared and kept ready for operation of the production of CMC.

Applications of the CMC:Construction Industry -

CMC is used in most of the compositions of cement and building materials because it acts as a stabilizer and hydrophilic agent.

Detergents –

The detergent industry is the largest consumer of CMC. Technical grade CMC compositions are most often used for soaps and detergents.  CMC acts as an inhibitor of the redeposition of grease in the fabric after it has been removed by the detergent.

Plastics –

The main use of CMC in the plastics industry is to help increase the viscosity of plastics such as latex.

Medicine –

CMC solutions are used to form gels that are used in heart, thoracic and cornea surgery. 

Other Applications – Paper Industry as a coating agent to reduce wax, Agriculture act As a glue for insecticides, Adhesives -CMC is added to various compositions of glues and adhesives that are used for almost any material, Paint- CMC is used in oil paints and varnishes. It acts as a thickener and suspends the pigment in the fluid,

Denature Protiens

A polymer which has lost secondary or tertiary structure. Denaturation of proteins involves the disruption and possible destruction of both

the secondary and tertiary structures.