SU897275A1 - Method of producing carbon adsorbent - Google Patents

Description

(5) METHOD FOR PRODUCING CARBON ADSORBENT

I

The invention relates to a method for the preparation of mechanical durable carbon adsorbents having a developed volume of mesopores, and can be used in medicine for hemosorption or immunosorption.

Methods are known for producing carbon adsorbents from t.orf (CKT-6A) and from wood (BAC), including the stages of granulation, carbonization, sulfur-potassium, and respectively vapor-gas activation 1.

However, carbon adsorbents, obtained according to a known method, have an insufficient volume of mesopores, as well as insufficient mechanical strength, which prevents their use as hemosorbents, in particular, does not allow to firmly hold sorbed immune globulins on the adsorbent and prevent blood contamination from due to the destruction of the adsorbent grains.

The closest to the proposed technical essence and the achieved result is a method for producing a carbon adsorbent, including mixing coal dust with a wood-chemical resin, granulating the resulting paste, carbonizing and activating the obtained granules 2.

The disadvantage of this method is that the resulting adsorbent has a low retention capacity for immune globulin proteins, namely 20-25.

The purpose of the invention is to increase the retention capacity of immune white globulins.

The goal is achieved by the fact that according to the method for producing a carbon adsorbent, which includes mixing carbonaceous raw materials and

20 wood-chemical resin, granulation of the resulting paste and the subsequent carbonization and activation of the granules, as; 389 semi-coking of tar-asphaltene oil substances containing 70-80% asphaltenes and the rest petroleum resins are taken from the carbon-containing raw material. The semi-coking product obtained at i (00-500 ° C) is used. The method is as follows. The asphaltene-derived substances obtained during de-asphalting of gasoline on Arlan oil with gasoline, containing 70–80 asphaltenes and the rest petroleum resins, they are subjected to semi-coking at 400–550 ° C for 0.51 h in the atmosphere of waste gases. In this case, they are partially dealkylated. and the product goes into an insoluble and infusible state. Asphaltene resin substances are highly condensed aromatic and heterocyclic products of a hybrid structure, containing: C 83 - 85; H 8-10; S 5-6 and N 0.5 - 0.8. After semi-coking, non-meltable products are crushed and crushed in a ball mill to fractions of 0.1 mm in size, then mixed in a two-blade mixer at 30-9P C for 10-20 minutes with prepared chemical resin and coal dust in the ratio: 18-20. During the mixing process, 50 ml of water per 1 kg of the mixture is added. The resulting mass is granulated with hot screw auger through filters 1, and the pressure in the forming part of the screw is 50–200 kg / cm at 95–105 C. The granules are tracked in air at 15–35 ° C for 6 hours. Carbonation is carried out in a rotary drum furnace. CQ2 at a linear temperature increase of up to 750-800 C at a heating rate of 150-600 K / h. Aging at a final carbonization temperature of 1 h. Raw coal is activated with water vapor at 800-820 ° C before burns 57-61%. The output of coal is 28 - 321. A carbon adsorbent is obtained having the following parameters of the porous structure, CMVr: .25 - 0.28; - 0.33; ., 37. Mechanical strength 75 78. The parameters of the porous structure change by varying the ratio of the semi-coking product: wood-chemical resin: coal dust. Then, the resulting adsorbent is purified at boiling point for 30 hours with 6NHC1 with the ratio of the weight of the adsorbent to the weight of the solution equal to 2, and then washed in columns with 0.5NHCI to a negative reaction to iron. The adsorbent is washed from the acid with distilled water and dried. To obtain an immunosorbent, a portion of the adsorbent to remove air bubbles is soaked in distilled water for 24 hours, then placed in columns through which the α-globulin solution is passed until the adsorbent is completely saturated. The breakthrough is determined by biuret reaction. Then, without changing the transmission rate, the columns are washed with 0.85 NaCl solution, which to some extent simulates blood. The exiting solution is also analyzed for the content of J -globulin by a biuret reaction. The difference of adsorbed and desorbed G-globules and there is no amount of globulin left on the adsorbent. The resulting sorbent has a holding sorption capacity for proteins globulins 50-80. Example 1. 500 g of resinous asphaltene substances containing 80 asphaltenes, 10 resins are placed in a retort, which is placed in a heating cabinet and heated to 500 degrees / h for 1 hour. Then 50 g of the semi-coking product is crushed to obtain fractions of 0.1 mm in size, mixed with 370 g of wood-chemical resin, 180 g of coal dust and 50 ml of water for 15 minutes. The resulting mass is granulated on a screw press through dies 2.5 mm and a pressure in the forming part of the screw 130 kg / cm. The granules are dried in air at 5 hours. Carbonation is carried out with an increase in temperature to 800 ° C with a heating rate of 600 degrees / hour. After carbonization, the granules are incubated for 1 hour. Then the raw material is activated at 800 ° C to burn 60.5%. Adsorbent 281 output. The pore volumes found from the benzene vapor sorption isotherm on the MacBen balance at 20 ° C are as follows: LLEE5 VM & Kpo 0.15. Mechanical strength 75 about 60, yield 28%. . 100 g of carbon adsorbent are boiled for 6 hours in 6 N HC1, then washed in a column of 0.5 M HC1 until negative.

Claims (2)

. Claim A method of producing a carbon adsorbent, comprising mixing a carbon-containing raw material and a wood chemical resin, granulating the obtained paste with subsequent carbonization and activation of granules, characterized in that, in order to increase the retention capacity of the immune globulin proteins, a semi-coking resin-asphaltene product is taken as the carbon-containing raw material oil substances containing 70-80% of asphaltenes and the rest are petroleum resins. 2. The method of pop. 1, with the fact that they use the product of semi-coking, obtained at 4007500 ° C.