FATTY OILS

 FATTY OILS

Fatty oils are fixed or non volatile oils. They

cannot be distiled without being decomposed.

They contain glycerin in combiation with a

fatty acid.

They are may be liquid or sometimes solid at

room temperature Those that are liquid

usually contain oleic acid while the solid ones

contain palmitic or stearic acid.

Fatty oils are insoluble in water but soluble in

several organic solvents. Breakdown products

of fats are fatty acids

accompanied by a rancid odor and taste.

Boiling a fat with an alkali causes it to

decompose and the fatty acid unites with the

alkali to form soap.

The addition of lye (a strong chemical cleaner)

or potash will make the soap softer, if soda is

used a hard soap results.

Fatty oils are bland and lack the strong taste,

odor and antiseptic qualities of essential oils.

They are suitable for human food. These

edible oils contain both solid and liquid fats

and form an importantpart of the human

diet.

 

and

 

glycerin

 

Vegetable fats and oils are found in greatest

abundance in frui

 

and seeds. While fats and

 

oils do OcCur in the roots, stalks, branches.

 

and leaves of plants in small quantities not

enough for commercial purposes.

Some seeds and fruits, however, the fat

Content is great in several cases as high as 355

PeT cent; in dried coconuts 65 per cent and

these are the commercial sources of vegetaDle

fats.

 

In some seeds the fat is found in the germ or

embryo; this is common in cereals. The olive

contains a large amount of fat in the pulp

Surrounding the kernel and only a smaller

amount in the kernel itself, while in the oil

palm both the pulp and the kernel contain

large amounts. The fat from the pulp may

have characteristics quite different from those

of the fat in the kernel.

 

4.7.1 CLASSIFICATION OF PLANT FATTY OILS

Semidrying oils

Drying oils

Non drying oils,

Fats or tallow

 

1. DRYING OILSS

The drying oils can absorb oxygen and on

exposure dry into thin elastic films and are

Lhereby converted into plastic. elastic, Tesih

like substances. Hence, when exposed 11 a

thin layer, as in painting, they form a toigh.

clastic. waterproof film which adheres ighty

to the painted surface and protects it from the

Weather. These oils are important in the paint and varnish industries

2. NON DRYING OILS

The nondrying oils are oils that remain liauid

at room temperature and do not form a film.

 

The fats are solid or semisolid at room

 

temperature. They are edible and also useful

for a wide variety of industrial uses: they are

used in soaps. cosmetics, lubricants, leather

dressings, and candles. They are used in the

 

processes of wool manufacture, especially

 

carding:

Olive: Olea europaea: Olive tree is a small

evergreen

Mediterranean Countries and to a lesser

degree in South Africa, Australia, South

America, Mexico and the United States. The

 

in

 

principally

 

cultivated

 

fruit of this plant has been valued as an

 

important source of an edible oil. It is used

1or canning sardines. It is als used in lamps, in some religions for anointing, and for

medicimal and cosmetic uses. Olive oil is

obtained by pressing thhe ripe fruits. The finest

grades are golden yellow and almost odourless

and are obtained by expressing the oil from

the pulp by hand. They are used for culinary

and medicinal purposes, while the inlerior

grades are greenish yellow and are obtained

by

mechanically. They used for making soaps and as lubricants

Groundnut or Peanut Arachis hypogea

Groundnut

Leguminosae.

propagated by seed. The groundnut pod

contains about 2- 4 nuts. The nuts have high

content of both protein (30%) and oil (40

50%). They are also rich in vitamins A and E.

Groundnuts are used as cooking oils and also

as fats for making margarine. The oil is also

used for packing fish e.g. in sardines. The

Residue left after oil extraction is used as oil

cakes for feeding animals.

They can be eaten raw, used in recipes, made

into solvents and oils, used in make-up.

medicines, textile materials, peanut butter, as

well as many other uses.

Popular confections made from peanuts

 

butter

peanut

butter cookies). peanut brittle, and shelled

peanutSo are

usually roasted in oil and packed in retail-size

plastic bags or hemetically sealed cans. Dry

roasted salted peanuts are also marketed in

 

include salted

(sandwiches, peanut candy bars,

 

peanuts,

 

peanut

 

nuts (plain/roasted). Salted

 

significant quantities.

Indianas

groundnuts. Nigeria used to be the largest

exporter of groundnuts.

Animal fats and oilo

 

Lanolin: Extracted from sheep’s Wool and is

used in the manufacture of conditionerS and

shampo0s.

 

bocicldo 3d

 

Suet: Suet is a hard fat found around the

loins and kidneys sheep or cattle (cow). It is

Solid at room temperature but ifthe

temperature is warmer, beef fat can melt or

turn rancid. Suet is one of the most popular

bird foods.

 

food to attract

 

It’s

 

the best

 

woodpeckers. It is also used in making

candles.

ish oil is oil derived from the tissues oy

1sh. Fish oils contain the omega-3 fatty acl1ds.

Fish do not actually produce omega-3 latty

 

acids, but

consuming either microalgae or prey 11s t

 

instead accumulate them by

 

acids,

 

have

 

fatty

 

accumulated omega-3

 

together with a high quantity of antioxidants

from microalgae.

 

 

 

Updated: February 9, 2020 — 7:02 pm

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