There are two main types of surfactants - Oleochemical
and Petrochemical. Oleochemical surfactants
are produced from natural oils like palm oil and palm kernel
oil as well as inedible tallow and are therefore often referred
to as ‘natural surfactants’ Petrochemical surfactants,
on the other hand, are produced from crude oil and therefore
considered as ‘synthetic’. However the terms ‘natural’
and ‘synthetic’ are misleading and have caused
confusion. Both types of surfactants are used and needed as
base materials for detergents but neither of them is superior
to the other in terms of environmental safety and friendliness.
Crude oil and vegetable oils are both natural
substances, however, since complex chemical processes such
as distillation, fractionation and hydrogenation are involved
in producing surfactants. they must both be considered as
synthetic!
When comparing the emission levels and the required energy
for oleochemical and petrochemical surfactant production,
petrochemical surfactants have proved to be far superior.
LAS emissions totalled less than 184 kilograms (kg) for every
1,000 kg of product. Emissions from oleochemicals range from
278 to over 379 kg. Process and transportation energy costs
for LAS are also much lower than those for oleochemical surfactants.
While it is true that crude oil is a non-renewable resource,
only 0.04 % of current annual petroleum production is used
for producing surfactants. However, if petrochemical surfactants
were to be replaced entirely by oleochemical surfactants,
it would necessitate significant increases in land usage,
thereby resulting in further destruction of rainforests and
other valuable habitats. |