A method of producing a sorbent for purification of water from petroleum products and heavy metals

 

(57) Abstract:

The invention relates to the field of production of new adsorption materials and can be used for water purification from oil products and heavy metals. The method consists in impregnating the fibrous cellulose-containing material of the active substance - titanium dioxide in an amount of 5 to 15 wt.%, impregnation are 2-7% solution of titanium tetrachloride in a hydrocarbon, C5- C7followed by hydrolysis with water and drying. The method provides for obtaining high-capacity sorbent. table 1.

The invention relates to the field of production of new adsorption materials and can be used for purification of water from petroleum products, iron ions, Nickel and suspended particles.

A known method of producing adsorbent on the basis of titanium with a pore size of 5-40 μm. How to filter through it provides a residual content of iron ions in the water to 0.19 mg/l [RU, 2006471, MKI 5 02 F 1/04, 01 D 39/00, BI N 2, 30.01.94].

The disadvantages of this method include significant problem of regeneration of the filter, the high cost and complexity of manufacture.

A known method of producing adsorbent applying salts FeSO4and FeCl3on what MIAK. [Pat. USSR N 1731737, MKI 5 C 02 F 1/52, BI 17, 92.05.07].

The disadvantages of this method include the unsustainable consumption of iron salts, frequent replacement of the filling of the filter, due to this appreciation of the process.

There is also known a method of producing a sorbent for water purification on the basis of vermiculite with a particle size of 0.25-2 mm processing 30-40% aqueous solution of lignosulfonate at a ratio of 1:6-24 and heat treatment of the obtained product at 550-700oC. the Method allows to increase the adsorption capacity for dissolved petroleum products compared with the known method 1.2-1.7 times. [USSR, 1632946, MKI 5 02 F 1/28, class D 01 J 20/30, BI N 09, 91.03.07.

The disadvantages of this sorbent should include large energy consumption, high temperature heat treatment, which significantly increases the cost of the product.

Closest to the proposed technical solution is the method of producing a sorbent for cleaning solutions from amines, in which the fibrous media - fiberglass - applied titanium dioxide by processing pairs of titanium tetrachloride, followed by hydrolysis with water and drying. (A. C. USSR N 1650242, B 01 J 20/00, 1991)

However, due to the small capacity fiberglass impossible to apply a sufficient amount of octopamine is to obtain high-capacity sorbent for oil, petroleum products, as well as ions of iron and Nickel, suitable for household filters.

This task is achieved by surface modification of natural cellulose fiber materials by the titanium dioxide applied on the surface of the fiber by sorption TiCl4from the solution of aliphatic C5-C7with the subsequent hydrolysis of H2O and drying. Application of solute ensures its uniform distribution throughout the volume. The presence of carbonyl groups in the cellulosic material allows you to create a strong bond due to the formation of hydrogen bonds between the carbonyl groups and titanium dioxide, which provides high resistance modifier to water washout. The presence of modifier allows to significantly increase the capacity of the adsorbent and to provide a broader range of extractables, as TiO2is a good adsorbent, and fibrous materials allow to increase the working surface.

As a natural fibrous materials can be used: wadding, gauze, waste textile production and other cellulose-containing products.

Example 1. In 70 ml of hexane dissolve of 0.47 g (1,02%) TiCl4. Obtained the Nova dried to constant weight. The weight of the finished adsorbent was 10 g with a content of TiO2= 2%.

Example 2. In 70 ml of hexane dissolve 1.19 g (2,58%) TiCl4. The resulting solution is impregnated with 9.5 g of gauze and dried. Then washed with water until neutral wash water, and again dried to constant weight. The weight of the finished adsorbent is 10 g with a content of TiO2= 5%.

Example 3. In 70 ml of hexane dissolve 2.38 g (5,15%) TiCl4. The resulting solution is impregnated with 9 g of gauze and dried. Then washed with water until neutral wash water, and again dried to constant weight. The weight of the finished adsorbent was 10 g with a content of TiO2= 10%.

Example 4. In 70 ml of hexane dissolve 3.57 g (7,73%) TiCl4. The resulting solution is impregnated with 8.5 g of gauze and dried. Then washed with water until neutral wash water, and again dried to rent a different weight. The weight of the finished adsorbent was 10 g with a content of TiO2= 15%.

Example 5. In 70 ml of hexane dissolve 2.38 g (5,15%) TiCl4. The resulting solution is impregnated with 9 g of cotton bleached medical and dried. Then washed with water until neutral wash water, and again dried to constant weight. Weight ready the l4. The resulting solution is impregnated with 9 g of cellulose (GOST 595-79) and dried. Then washed with water until neutral wash water, and again dried to constant weight. The weight of the finished adsorbent was 10 g with a content of TiO2= 10%.

The obtained adsorbents were determined maximum capacity in oil emulsion, ions of iron and Nickel.

The data given in the table.

Thus, the proposed method allows to obtain sorbents, purifying contaminated water to the required environmental standards, this sorbent can be used in both domestic and technical filters.

A method of producing a sorbent for purification of water from petroleum products and heavy metals, including the processing of fibrous media of titanium tetrachloride, followed by hydrolysis with water and drying, characterized in that the fibrous media using cellulose-containing material, titanium tetrachloride is used in the form of its 2 - 7% solution in hydrocarbon, C5- C7the process is carried out until the content of titanium dioxide sorbent from 5 to 15 wt.%.

 

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FIELD: sorbents.

SUBSTANCE: invention relates to developing porous materials and adsorbents, including medicine-destination ones, as effective agents for hemo-, entero-, and vulneosorption, cosmetics, environment-oriented materials, enzyme and cell carriers, biologically active substances, and drugs. Alumina-based sorbent of invention is characterized by meso- and macroporous structure and contains modifying component: polyvinylpyrrolidone-silver complex with 0.05 to 0.3 wt % Ag.

EFFECT: increased adsorption capacity regarding toxins with different molecular weights and acquired bactericidal properties.

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