SU525732A1 - Method of producing carbon black - Google Patents

Description

(54) METHOD FOR OBTAINING SOI

This invention relates to a method for producing carbon black from liquid hydrocarbons. It can be used in the carbon black industry to obtain carbon blacks of various dispersion and structure,

A known method for producing carbon black is the decomposition of hydrocarbon gas, which consists in introducing the products of fuel combustion from the chamber of the mountain & carbon hydrocarbons and oxygen-containing gas with the subsequent directing of the mixture into the expansion zone.

In the expansion zone occurs: an intense decrease in temperature, due to which only low-structural and normal-structural soot with reduced dispersion can be obtained by this method. An increase in the total oxygen content in the gases of the complete combustion of the fuel leads to a slight increase in the structure of the soot, but at the same time its yield is greatly reduced.

The purpose of the invention is to increase the dispersion, structure and yield of soot.

To do this, to the beginning of the expansion zone of the raw materials and gas flow products

(A single gas containing gas is introduced. The amount of additionally injected casaoro is 3–25 wt.% Of the total cohort of oil: hydrogen introduced into the process. With the additional introduction of hydrogen containing gas into the expansion zone, the oxygen reacts with hydrogen and an ozone core. (Contains sashimis in flue gases, causing the temperature of the reaction mixture to increase. Soot formation at higher temperatures, which contributes to an increase in the structure and quality of soot. Ori hydrocarbon feedstock, which increases soot output.

In combustion chamber 1 (b. Drawing), the combustion of fuel ef excess air has escaped. Ophase products of full jrope do not enter the narrowing zone 2 of the reactor, 1 where they acquire a speed of 30% 6.0 m / s. In the zone of constriction 2 radial jets from to; feeds are introduced by nozzles. The parallel {BUT streams surrounding the inlet flow oxygen-containing gas, which contains 3–20% of the total amount of oxygen taken into the process. From the zone of narrowing 2, the raw material-gas mixture enters the expansion zone 3, in which the processes of heating the raw material and soot occur. At the beginning of this zone after 0.0001-0.005 sec after entering the raw material and gas stream, oxygen-containing gas, containing 3-35 wt.%, Is supplied into it radially or at any angle. % of oxygen from its total amount introduced into the process. In chamber 4, the decomposition of raw materials takes place with the formation of soot. The oxygen concentration in the oxygen-containing gas fed to the process. It may be from 1O to 1% S%. PRI me R. In the combustion chamber 1 serves fuel (propane-butane mixture) in the amount of 12O nm / hour. Parallel

The consumption of raw materials in the reactor, kg / hour

Fuel consumption in the reactor (propane-utanova mixture), nm / hour

The total flow rate of low pressure air supplied to the combustion chamber is

constriction and expansion

including in the expansion zone Temperature in the zone of narrowing of the flow, C

Temperature in the flow expansion zone, C

The temperature at the end of the reaction

° C zone.

Specific air consumption, nm per 1 kg of raw material

Soot yield per raw material,%

Specific geometric surface, m / g

Specific adsorption surface, m / g

Oil number, ml / 1OO g

pH

Optical density

gasoline; extract

ISOO

120

6900

about

15OO

1100

1500

4.60

40.0

table 2

95

BUT

110 7.5. The low-pressure air in the amount of 5500 was injected into the same chamber by a stream of 0.5 to 0.5. The products of complete combustion enter the narrowing zone 2 of the reactor, where radially jets of injection from 1500 kg / h of liquid feedstock with the ratio H: C of 1.05 and correlation index of 12O. The raw material is injected into the zone of constriction 2 with low pressure air in the amount of 5OO. Thanks to the contraction, the syfie quickly i is mixed with the products of complete combustion and with a speed of 300 m / s enters the expansion zone 3, at the beginning of which 500 oxygen-containing gas is additionally introduced. The conditions of the method compared with the known and physico-chemical properties of the resulting carbon black are given in Table. 1 and 2. Tabli.tsa 1