|
17,01
35,49
46,38
Ʃ – unsaturated FA
82,74
64,51
53,62
JSC «Urgench yog-moy» produces a mixture of fatty acids, which is mainly
used in the production of household soaps. But these mixtures contain significant
381
amounts of saturated and unsaturated acids. As we conduct research on the
development of cost-effective technologies for the production of detergents, the
percentage of this saturated and unsaturated fraction in the composition is an
important indicator for us. Therefore, the fatty acid composition of the fatty acid
mixture produced at «Urgench yog-moy» JSC was studied.
a
b
c
Fig. 1. Chromatograms of the fatty acid composition of the control sample Z-55
(China) (a), soapstock of the JSC «Urgench yog-moy» (b) and oleic-palmitic fraction
of acids of the JSC «Urgench yog-moy» (c)
The results of this experiment will serve as a basis for the next stages of our
research. The next task of our research is to study the possibility of using non-food
seed oils as a raw material in the production of detergents.
References
1. Tyutyunnikov B.N. Chemistry of fats. - M.: Chemistry, 1992. p.540
2. Ruzmetova D.T. Development of technology for bleaching distilled fatty acids
with local clay adsorbents // dissertation doctors of Philosophy for tech.
sciences, Tashkent, p.15-16
382
STUDY OF ADSORPTION PURIFICATION AND BLEACHING
OF THE FATTY ACIDS OF COTTON SOAPSTOCK
AND THEIR SEPARATE FRACTIONS ON DEVELOPED ADSORBENTS
1
Salikhanova D.S.,
2
Ruzmetova D.T.,
2
Sadullayeva M.Sh., Matchonov S.Sh.
1
Institute of General and Inorganic Chemistry
2
Urgench State University
Fatty acids are valuable products that are used in various areas of the national
economy. One of their sources is the waste of alkaline refining of vegetable oils, the
so-called soap stocks, which are concentrated aqueous solutions of soaps and organic
impurities. The qualitative and quantitative composition of soap stocks depends on
the type of refined oil.
As practice has shown, distilled fatty acids of different colors and content of
accompanying substances are obtained at fat-and-oil enterprises, which must be
refined with activated adsorbents.
This approach is considered to purify distilled fatty acids from the remaining
coloring pigments and related substances. Despite the similarity of the sorption
capabilities of activated clays, they do not always provide the required quality of fatty
acids for cosmetic, paint and etc. industries. Taking this into account, we carried out
studies of adsorptive purification and bleaching of fatty acids of cotton soap stock
and their individual fractions on the developed adsorbents.
On the basis of experimental and theoretical studies of the process of
purification of fatty acids of cotton soap stock with acid-activated bentonite
adsorbents, we can say that coloring pigments associated with fatty acids (gossypol,
chlorophyll and their derivatives, etc.) have different kinetic sorption parameters,
which give rise to further search for effectively activated adsorbents based on local
kaolin minerals.
Table 1 shows the main physicochemical parameters of the initial and purified
FFA on selected local activated adsorbents.
It can be seen from practice that distilled fatty acids are used depending on their
physicochemical parameters, for example, pour point (titer), color, the content of
non-fatty substances, etc.
The use of this installation also does not contribute to the maximum removal of
coloring pigments (gossypol, chlorophyll, and their derivatives) and non-fatty
substances.
Therefore, we have studied the possibility of adsorption before purification of
solid and liquid fractions of DFA of CO on selected adsorbents (tab. 1).
Note:
NAB-Navbakhor
alkaline
bentonite,
TCP-Tulsohsky
carbonate
palygorskite, AK - Angren kaolin, SUK - Sultan-Uvays kaolin.
383
Table 1
The main physical and chemical parameters of the original and purified DFA on
selected local activated adsorbents
The name of
indicators
Baseline
indicators
of FA
Indicators of purified FA at 4% consumption
of the following adsorbents
Navbakhor
alkaline
bentonite
Tulsohsky
carbonate
palygorskit
e
Angren
kaolin
Sultan-
Uvays
kaolin
Color in hard
condition at 20 ° С
Dark
yellow
Light yellow
Smell
Characteris
tic to FA
Characteristic to purified FA
Acid value, mg
KOH/g
198,5
198,3
197,8
198,9
199,3
Mass fraction of
moisture and volatile
substances,%
0,23
0,15
0,17
0,2
0,18
Mass fraction of
unsaponifiable
substances,%
1,7
1,2
1,1
0,8
1,0
Pour point of liquid
acids (titer), °С
33,4
33,2
33,0
33,5
33,8
Gossypol content, %
5,3
3,1
3,5
2,7
2,5
Sulfuric acid (quality
test)
is absent
is absent
The output of the
bleached DFA of CO
-
97,6
97,3
98,1
98,3
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