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Introduction,
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Introduction
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Carrageenans or carrageenins are a family of linear
sulphated polysaccharides extracted from red seaweeds.
- Gelatinous
extracts of the Chondrus crispus seaweed have been used
as food additives for hundreds of years, though analysis of
carrageenan safety as an additive continues.
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Carrageenans are large, highly flexible molecules which curl
forming helical structures.
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There are three main commercial classes of
carrageenan: Kappa, Iota , Lambda .
Manufacturing Process
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Carrageenan is a collective term for polysaccharides
prepared by alkaline extraction (and modification) from red
seaweed (Rhodophycae), mostly of genus Chondrus,
Eucheuma, Gigartina and Iridaea.
Different seaweeds produce different carrageenans.
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Carrageenan is also equivalent to agar, which
is derived from red algae, and sometimes seaweed. The
process is the same for producing agar as it is for making
carrageenan. In both instances, the alga is
boiled down to make a jelly substance.
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Carrageenan is extracted from the seaweed by alkali
treatment at high temperature. The extract is then purified
and converted into powder.
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Carrageenan is recovered by alcohol precipitation, by drum
drying, or by freezing. The alcohols used during recovery
and purification are restricted to methanol, ethanol, and
isopropanol.
Uses
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Carrageenans are used mainly for thickening, suspending
and gelling. κ- and
ι-carrageenans form
thermoreversible gels on cooling in the presence of
appropriate counter ions.
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Carrageenans
comes from algae or seaweed, and can be used as a
thickening agent in place of animal-based products like
gelatin, which is extracted from animal bones.
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Carrageenans specifically tailored for water-thickening
applications are usually lambda types or the sodium salt
of mixed lambda and kappa.
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Another major application of the gelling properties of
carrageenans is in air freshener gels
Market
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At
present the market is split into approximately 20
percent dairy and 80 percent meat applications, but
this is likely to change with a gradual increase in
the dairy foods market .
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During the past few years, the total carrageenan
market has shown a growth rate of 3% per year,
reaching estimated worldwide sales of 310 million
US$ in 2000.
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The
market for carrageenan is expected to grow steadily
at about 4 percent this year, with supply and demand
in alignment.
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Carrageenan prices are estimated at $3.50 to $4.50
per pound, depending on grade
Entrepreneur who want the information such as
" Introduction,
Manufacturing Process , Products, Applications, Company Profiles,
Market"
about Carrageenans can Email
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