SU1035238A1 - Oil-base binder for preventing fighting of dust formation - Google Patents

Abstract

A prophylactic agent to combat dust formation, including tar oil sulphurous oils, so that, in order to improve the dust-binding properties, improve sanitary and hygienic working conditions and eliminate pollution of the environment, it additionally contains soda; it is a vacuum residue of distillation. a cracked oil residue and. highly aromatic Gao-oil fraction in cryogenic processes with a boiling point of 2,30500 ° C with the following ratio of components, wt .: Sulfur oil tar 20-0 Vacuum co-distilled distillation residue (Peat residue "0-50 Highly aromatizing / and gas-oil fraction of secondary processes with limits boiling point 230-500 0 20-30 O CO cl tsD CO 00

Description

The invention relates to prophylactic agents used in mining enterprises to combat dust generation, for example, on quarry roads, also to protect against erosion of dumping surfaces, transported and stored minerals, and the like. A prophylactic agent against dusting is known, consisting of an extract for the selective purification of an oil fraction with a boiling point of 280-ii10 ° C (73, EE91 99 mpdsD), a residue from thermal cracking of heavy distillate fractions boiling away within 350500 ° C (8–20 masd), and formaldehyde (0.01–0.02 masd; which requires a prematurely good dispersion of the whole composition}. However, the known composition has low performance properties. It is a known preventive agent for universin to combat dusting, adhering by blowing, bulk materials during transportation, etc., consisting of an extract for the selective purification of oil fractions with a boiling point (70 E wt.%), a cracking residue (2–10 May D) tar (2–10 masd, asphalt (May 210 //,), sulfur oils 2. The disadvantage of ukyversin is low dusting ability. In addition, the oil purification extract contains phenol in its composition in an amount of up to 0.01 wt., Which is easily washed away by water and Knows the environment. The aim of the invention is to increase the dust-binding properties of prophylactic agents. , Improving sanitorno hygienic working conditions and the elimination of environmental pollution. This goal is achieved by the fact that a prophylactic agent for combating dust formation, including tar of sulfur oils, additionally contains an evacuated distillation residue of a cracked oil residue and a highly aromatic gas-free fraction of secondary processes with boiling limits of 230-500 ° C at the ratio of components, wt. . Sulfur oil tar 20–0 Vacuum vacuum distillation of cracked oil residue 40–50 Highly aromatic gas oil fraction of secondary processes with boiling range. 230–500 ° C 20–30 Replacing the extract of selective purification of oil fractions with a highly aromatic gas oil fraction of secondary processes with boiling range 230- 550 ° C allows to obtain a prophylactic agent that does not contain phenol. The characteristics of the physicochemical properties of the highly flavored gas oil fraction are given in Table. 1. A highly aromatic gas oil fraction of secondary processes with a boiling range of 230-500 ° C is used as a diluent in which asphalt-resinous substances are well dissolved, both as a vacuum residue of the cracked oil residue and tar. The start of boiling of a highly aromatic gas oil fraction is determined by the flash point of the prophylactic agent and it must be at least 150 ° C, which corresponds to gas oil with a boiling point of 23 ° C. The end of the boil of highly aromatic gas oil of secondary processes is determined by its responsiveness to depressant additives - asphalt resinous substances contained in the vacuum residue of the distillation of the cracked oil residue and tar. Replacing the cracking residue ingredient with an evacuated distillation residue of the cracked oil residue, in KotopOM, the content of asphalt-resinous substances increases from 20.1 to 30.2 wt., Improves its adhesiveness, i.e. creating a stronger bond of the prophylactic agent with soil particles on the road, and thereby improving its dust-binding properties and water resistance of the fortified soil. A comparative description of the physicochemical properties of the proposed prophylactic and the universin is given in table. 2. The optimum of the vacuum residue of the distillation of the cracked oil residue in the prophylactic agent is. At a lower content of the vacuum residue, the amount of tar and composition is not enough for dusting. At higher levels, the wetting rate of dust and viscosity and temperature properties deteriorate. According to the requirements of the operating conditions in the summer period, the prophylactic should have a temperature not less than the viscosity, the viscosity at a temperature of no more than 25 degrees Engler and the wetting speed of dust not less than 3 mm / h, which allows to apply it by heating by gravity or with using nozzles on the treated surface of the soil. The sulphurous oil neftTea is used in a prophylactic agent as a plasticizer, it helps to increase its cohesive properties of colloidal stability and to obtain a durable elastic coating on roads. This is due to the fact that asphaltenes from tar have a looser structure with a large number of side chains, which are better solution) in a dispersion medium than the asphaltenes of the vacuum residue of the cracking residue distillation. The residual residues (tar) are characterized by an increased col- lection stability of 3 ml of n-heptane) as compared to evacuated residues of destructive processes (0.6 ml of n-heptane), which makes it possible to obtain a stable prophylactic agent which during storage and storage does not disintegrate. In addition, asphalt-resinous substances contained in tar are more resistant to thermal-oxidative aging, since they include saturated hydrocarbon compounds, the presence of which in a preventive agent, in turn, largely determines the durability of road surfaces and fortified soils. . Since studies have determined that the cohesive properties increase most intensively with the addition of tar to 40 May;% and further slow down, an increase in the dosage of tar of sulfur sulphates more than Q% by weight is irrational. Obtaining a prophylactic is carried out by compounding the ingredients in two stages: to better dissolve the evacuated distillation residue of the cracking residue is mixed at 100-110 ° C with a highly aromatic gas oil fraction of secondary processes with boiling ranges of 230-500 ° C, the resulting composition on the tank is mixed with SO-PO With tar tar sulfur oils. The proposed prophylactic agent has good vacuuming properties — H 96.5–99.5 wt.% Versus 48 wt. for univerin), it completely lacks phenol, the ultimate strength of the soil under compression is 1.78 MPa versus 0.88 MPa for univerin. The application of the proposed prophylactic means ensures the reduction of air dustiness on motor roads to sanitary standards for a period of 4–60 days at a driving intensity; Yeni cars up to 100 cars / h.

Table 2 and ii 1

Fractional composition

The temperature of the beginning of fines

360 UO U50

500

Colloid stability, ml n-heptane

23

7,

50 86 96

3.0

left, mas .:

The vacuum residue of the distillation of the CreoO itO of the cased residue

Tar arlan oil

Highly aromatic gas oil fraction with a boiling point of 230-500 0

20

Extract of selective purification of oils with a boiling point of 280i 1 () 4

Cracking residue

Sulfur oil asphalt, kg / m

Pour point, C Flash point, C 150

Viscosity is conditional when

Group hydrocarbon composition, masd:

Paraffin naphthenic

Monocyclic Aromatic

Bicyclic aromatic

Polycyclic aromatic

resins

Asphaltenes Carbens, Carboids

Table

50 25

ten

251, 78

,

1.89

k, Q

, 96.5 Missing Missing

4o 50

1035238

Continued table. 2 j

0.88

1.78 1.8 1.80

four

3.5

1.8 99.0

tweets

0,005

thirty

Claims (1)

A prophylactic for combating dust formation, including a tar of sulphurous oils, characterized in that, in order to increase dust-binding properties, improve sanitary-hygienic working conditions and eliminate environmental pollution, it additionally contains a vacuum residue from the distillation of cracked oil residue and. highly aromatized gas oil fraction of secondary processes with a boiling point of 230500 C in the following ratio of components, wt.%: Tar of sulphurous oils 20-40 Vacuum residue distillation cracked oil residue 40-50 Highly aromatized gas oil fraction of secondary processes with boiling limits 230-500 ° C 20-30> from the thermal distillation range of 350 formaldehyde