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General Information
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Sodium
Carboxymethyl Cellulose (CMC) is a kind of white grain and fibrous
powder which are nontoxic and easy to absorb water.
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It has
good water solubility, stickiness, emulsification, diffusibility, enzyme
resistance and thermal stability.
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The
transparency of its solution gets corresponding improvement with the
increase of substitution degree.
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The
water solubility of CMC presents neutral or light alkalescence. It will
precipitate when meeting the metallic ion with more than bivalence.
Production Process
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Production of CMC is carried out by conversion of alkali cellulose
swollen in aqueous NaOH and a surplus of an organic solvent with
monochloroacetic acid or its sodium salt.
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CMC
from durian rinds was prepared by etherification of cellulose and
monochloroacetic acid. Cellulose was first recovered by chemical pulping
process.
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CMC
prepared with different pulps/acid ratio (1:0.75, 1:1.0, 1:1.25, and
1:1.5) in alkaline condition, yielding 45-52% of pure CMC.
Applications
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Sodium
CMC is used as a thickening agent, stabilizer, suspending
agent.
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Products such as toothpaste, laxatives, or diet pills contain either MC
or sod. CMC. Other products include ice cream, water-based paints,
detergents and a variety of paper products.
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Main
CMC application sectors include production of detergents, oil industry,
pharmaceuticals, textile industry, food industry, etc
Market
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The
annual demand for CMC in Russia and other CIC countries is about 60-65K
mt, while Russia consumes 6K mt/y. Currently, Russia features 13
facilities manufacturing Na-CMC of various grades.
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The
fastest growth of consumption is demonstrated by the food industry
(diary products, ice-cream). The global consumption growth rate within
this sector is 3.5% a year.
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