SU1224268A1 - Water-proofing agent for expanded perlite sand sorbent - Google Patents

Description

The invention relates to the cleaning of the surface of water from oil pollution and can be used in the preparation of sorbents for cleaning the surface of water when spilling large quantities of oil.

The purpose of the invention is to increase the sorbent oil content and reduce its cost.

The oil capacity of the sorbent is increased by hydrophobing it with a mixture of paraffin hydrocarbons and bottoms of synthetic fatty acids (FFA) in the following ratio, wt.%:

Paraffin

33-50

leftovers

synthetic

fatty acids 50-67

KO FFA is a hard-to-implement waste product for the production of synthetic fatty acids; therefore, its incorporation into the composition instead of commercial reagents makes sorbent cheaper.

A hydrofoil remover is prepared by simply mixing the ingredients.

The application of the water repellent to the expanded perlite sand with a volume mass of 0.1 kg / m is carried out by mixing it in a rotary drum with a weight of 2.7, water repellent at 125-135 seconds for 1 hour.

The effectiveness of the water repellent is established by determining the oil intensity of the hydrophobised expanded perlite sand by the weight method.

Oil capacity is the weight ratio of the adsorbed oil to the adsorbent, in this case in hydrophobized perlite sand.

To determine the oil capacity of hydrophobized perlite sand, the tank (diameter 29.4 cm and height cm) is filled with water (surface 6.8 dm). A certain amount of oil is applied to the surface of the water. Then, with moderate stirring of the upper layer of water, hydrophobized pearlite sand is added in portions. Its addition is stopped after the absorption of all the oil and the formation of a monolithic, soft

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ts

20

25

224268

units, and, the longer the mixing, the greater the volume of units were obtained, up to a single.

Example, In the tube placed KO FFA and paraffin hydrocarbons, according to the composition. Heat the mixture before and shake vigorously for 10 seconds, shake it. 15.0 g of perlite sand is placed in a metal drum, 0.30 g (2% of sand) of the prepared water-repellent agent is added and stirred at a mixture temperature of 135 ° C for 1 h by rotating the drum at 100 rpm.

10.2 g of oil are poured into a container with water. When the oil ceases to grow, as it is scattered on its surface with moderate stirring with a spatula, portions of the prepared hydrophobized perlite expanded sand. Stir until oil turns into black and soft aggregates. The obtained data of oil capacity, absorption time, sorbent consumption and its cost are shown in the table.

The collection of light slip aggregates of aggregates — oil complexes with a sorbent, is carried out by known methods and oil is regenerated by known methods.

According to the table, it can be determined that the average oil capacity of the proposed water repellent is minus examples for the limiting ratio of components to 8.6 g / g adsorbent, with an increase in the paraffin content in the water repellent above 50% its oil capacity decreases, the price increases, and decreasing its content below 33% - the hydrophilic agent becomes ineffective. The increase in CO FFA above 67% also leads to a decrease in the main indicator - the oil intensity of the expanded sand it has processed. The decrease in CO FLC below 50% dramatically reduces the oil capacity of syrbent and, moreover, increases the price of water-repellent agent.

The proposed water-repellent agent is, on average, 28% more efficient than the known water-repellent agent and is cheaper by 3 times.

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Claims (1)

GVDROPHOBIZATOR OF EXPLOSED PERLITE SORBENT SAND for purification of the water surface from oil and oil contaminants containing paraffin hydrocarbons C ₂₀ -C _<{( , characterized in that, in order to increase the oil capacity of the sorbent and reduce its cost, the hydrophobic agent additionally contains bottom residues synthetic fatty acids in the following ratio, wt.%: Paraffin hydrocarbons C _{1c -} See 33-50 VAT residues of synthetic fatty acids 50-67 § £ S e b'o bu ke oo>