SU1224267A1 - Water-proofing agent for expanded perlite sand sorbent - Google Patents

Description

I

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.

As a water repellent sor-: bent-expanded perlite sand, a mixture consisting of coal tar, sodium salts of carboxylic acids of paraffinic hydrocarbons is taken at the following ratio of components, wt.%:

Stone coal

25-57

3-8

Rest

The process of preparing a water-repellent agent consists in the simple mixing of the components: to the molten hydrocarbons, coal tar heated to 55-60 ° C and the carboxylic acid salts C, -Cso (or vice versa) are added with stirring.

Water repellency of expanded perlite sand with bulk density

.five

 80 is carried out by mixing it in a rotating drum with a 2 wt.% Water repellent at 120-135 ° C for 40-60 minutes.

The effectiveness of the water-repellent agent is established by determining the oil capacity of the sorbent — the water-repellent expanded perlite sand by weight method (oil capacity — the weight ratio of adsorbed oil to adsorbent, in this case to perlite sand).

To determine the oil capacity of hydrophobized perlite sand, a certain amount of oil is applied to the surface of the water (6-8 dm). Then, with moderate stirring, the hydrophobized sand is added in portions with a spatula of the upper layer of water. Its addition is stopped after the absorption of all the oil and the formation of monolithic, soft aggregates, moreover, the longer

to

15

20

25

2242672

the larger the volumes get units, up to a single. .

The hydrophobicity of expanded-graded sand is conducted in a metal drum with an inner diameter of 80 mm and a length of 110 mm.

Example. In a test tube with a capacity of 25 MP placed resin, paraffin hydrocarbons FR. C-C, and salts of carboxylic acids. Heat the mixture before and shake vigorously for 10 seconds and mix it.

Hydrofibisation of the expanded perlite sand is carried out in the following order.

17.0 g of perlite sand are placed in a metal drum, 0.34 g (2% of sand) of a water-repellent prepared earlier is added and at a mixture temperature of 135 s, it is stirred for one hour by rotating the drum at 115 rpm.

To clean the surface of the water from oil, oil is poured into a container with water. When the oil ceases to flow, sprinkle the prepared hydro- phobic perlite sand into the surface (with moderate stirring with a spatula). After mixing, all the oil turns into black and soft aggregates.

In tab. 1 shows the data obtained by JJ on oil capacity, absorption time, sorbent consumption and its cost.

The average oil capacity of the sorbent treated with the proposed hydrophobicizer according to examples 1-8 is 8.5 g / g of the adsorbent, which is 27% higher than that of the prototype 6.6, and the sorbent itself is 2 times cheaper (i.e. 108 rubles versus 213 rubles according to the prototype).

The selection of boundary limits is based on a comparison with the prototype not only on the oil content of the sorbent, but also on the cost of 1 ton of water-repellent agent and its stability during storage.

The water repellent giving the big. oil capacity on the first day will be unreliable if it separates in 2-5 days, lost in its qualities. 55 Table. Figure 2 shows the results of the examples on the degree of separation of the water repellent depending on the composition and duration of its storage.

40

45

50

3 1224267

. The degree of delamination is determined by known methods and

following methods. by known methods to regenerate

Prepared water-repellent in oil.

Placement into a glass measuring cylinder. The application of the proposed hydrophone is 100 ml and it is kept in thermostats of the bizator, it significantly reduces the cost at 70 ° C. The delamination boundaries of the liquid cleaning the surface of the water from the oil components are determined in wi .% every 24 part tons of oil spills on top of a collection of easily agglomerated water aggregates and significantly increases

complexes of oil with a sorbent - it is possible 10 cleaning efficiency.

. - Table 1

Salt precipitation

Component Lamination

"

Accumulation of salts during storage and partial delamination of components

Editor V. Kovtun

Compiled by L.Ananyeva Tehred O.Sopko

Order 1884/21

Circulation 864 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Branch PPP Patent, Uzhgorod, st. Project, 4

table 2

Proofreader V. But ha

Claims (1)

SAND hydrophobing expanded perlite sorbent for cleaning the surface of water from oil and oil pollution, comprising paraffinic hydrocarbons C _ao -C _9O and sodium salts of carboxylic acids ^{with? "With} EO" characterized in that, in order to increase oil capacity of the sorbent and reduce the cost, hydrophobing additionally contains coal tar in the following ratio of components, wt.%: Coal tar 25-57 Sodium salts of carboxylic acids St Szo 3-8 Paraffin hydrocarbons Rest