RU2686921C1 - Method of producing bitumen binder for roofing materials - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of oil refining, in particular to a method for producing a bituminous binder, used as a basis for polymer-modified bitumen, intended for the production of roll roofing material. Method involves the oxidation of the “darkened” product of vacuum distillation of fuel oil, which is a “darkened” product of vacuum distillation of fuel oil with a total content of paraffin-naphthenic and light aromatic hydrocarbons of 28–39 wt.%. At the same time, before oxidation, it is additionally injected with tar, which has a conventional viscosity at 80 °C 70–150 s, containing not more than 7 % by weight of asphaltenes at a ratio of “darkened” product : tar equal to 60–90:10–40, and the components are mixed at a temperature of 100–150 °C.

EFFECT: technical result of the invention is to obtain a bitumen binder for the production of high-quality roll bitumen-polymer roofing material with good ductility, having a high resistance to bleeding oil fractions at temperatures above 40 °C.

1 cl, 1 tbl, 3 ex

Description

The invention relates to the field of oil refining, in particular to a method for producing a bituminous binder, used as the basis for polymer-modified bitumen, intended for the production of roll roofing material.

A method of obtaining a bituminous binder by continuous oxidation of petroleum residues of West Siberian oils at elevated temperatures in a column-type apparatus, compounded raw materials in the form of tar and modifying-solubilizing additive, which is either the 2nd vacuum distiller ABT-2 and AVT-6 with a boiling point of 220-260 ° C at 20-30 mm. Hg, or the residue of the rectification of total paraffins produced by linear alkyl benzenes in the following ratio: modifying - solubilizing additive 10-50%; tar (with penetration 280-350 dmm) - the rest (US Pat. RU 2359990).

However, the resulting bituminous binder contains low-boiling fractions of the vacuum epaulette, which can lead to them bleeding from the roll roofing material at temperatures above 40 ° C, the appearance of rusty stains on the roofing material, spoiling the appearance of the material. Bitumen has a low temperature resistance. The technology of obtaining a bituminous binder requires the use of scarce diluents.

The closest to the present invention is a method for producing a bituminous binder for roofing materials by oxidizing a mixture of a “darkened” product of vacuum distillation of fuel oil — a fraction boiling within 420-470 ° C with a total content of paraffin-naphthenic and light aromatic hydrocarbons above 40 wt.%, And a fraction vacuum gas oil boiling in the range of 330-530 ° C, taken in ratios 99: 1-80: 20, while the oxidation is carried out at a temperature of 200-280 ° C, air flow rate of 90-110 m ² / h per 1 ton of raw material and time oxidation of 4-7 hours (US Pat. RU 2209229).

However, the resulting bituminous binder has a high content of light oil components, which leads to their sweating from the roll roofing material at temperatures above 40 ° C and the coloring of the roll roofing material produced on its basis. The technology for producing a bituminous binder according to this method requires the use of a deficient fraction of vacuum gas oil (a fraction boiling between 420-470 ° C), which is the raw material for producing gasoline and other types of fuels in the processes of recycling and high consumption of "darkened" product.

The aim of the invention is to obtain a bitumen binder for roll roofing material having high resistance to bleeding oil fractions, leading to staining of the roofing material at temperatures above 40 ° C, saving the scarce fraction of vacuum gas oil and the “darkened” product of vacuum distillation of fuel oil.

This goal is achieved by a method of obtaining bitumen binder for roofing materials, including oxidation of the “darkened” product of vacuum distillation of fuel oil, while the “darkened” product of vacuum distillation of fuel oil with a total content of paraffin-naphthenic and light aromatic hydrocarbons is used as the “darkened” product of vacuum distillation of fuel oil 28-39% wt., Before oxidation, it is additionally injected with tar having a nominal viscosity at 80 ° C for 70-150 s, containing not more than 7% wt. asphaltenes, with a ratio of "darkened" product: tar, equal to 60-90: 10-40, and produce mixing of the components at a temperature of 100-150 ° C.

The “darkened” product is the distillate fraction of the vacuum distillation of fuel oil boiling over in the temperature range 420-580 ° C.

The method is as follows.

To obtain raw bituminous binder for roofing materials, the residue of oil distillation is fuel oil from West Siberian, Bashkir, Tatar, Ukhta oil or their mixtures, with a boiling point not lower than 300 ° C and distilled in a vacuum column with a residual pressure of 2-4 kPa. From the bottom of the vacuum column, the “darkened” product is removed from the side of the vacuum column - a fraction boiling away at 420-580 ° C, and tar from the bottom of the column.

The operation mode of the vacuum column provides for obtaining a “darkened” product with a total content of paraffin-naphthenic and light aromatic hydrocarbons of 28-39% by weight. and tar with a conditional viscosity of 70-150 seconds at 80 ° C with an asphaltene hydrocarbon content of not more than 7% wt.

The “darkened” product is mixed with tar in a storage tank at a temperature of 100–150 ° C in ratios of 60–90: 10–40, controlled feed of tar, from where the mixture is pumped into an oxidation column, into the lower part of which air is supplied through the mother liquor for oxidation.

Oxidation can also be carried out in a reactor of a special design, manufactured according to the licensed technology “Biturox” of the Company “Perner Engineergesellschaft MBH” (Austria). In the reactor, a three-stage dispersion of air along the height of the apparatus is carried out with the help of a mixer and special plates; water is supplied as part of the oxidation air.

The oxidation is carried out at a temperature of the bottom of the oxidation column 190-250 ° C, air flow rate 76-96 nm ³ / m ^{3 of the} feed mixture per hour.

The method is illustrated by the following examples.

Example 1

Fuel oil obtained by processing a mixture of West Siberian, Bashkir, Tatar oils (70%) and Ukhta paraffin oil (30%) is subjected to vacuum distillation to produce a “darkened” product and tar, having the following characteristics

"Blackout" product:

Temperature limits of boiling according to ASTM D 1160, ° С 420-560 The total content of paraffin-naphthenic and light aromatic hydrocarbons according to the methodology of the State Unitary Enterprise “INHP”, Ufa, determined on gas-liquid chromatograph "Gradient", wt. % 39.00 Density at 20 ° С according to GOST 3900, kg / m ³ 988 Softening temperature according to GOST 11506, ° C 27 Conventional viscosity at 80 ° С according to GOST 11503, s ten

Tar:

Asphaltene content according to the methodology of the State Unitary Enterprise “INHP”, Ufa, determined on gas-liquid chromatograph "Gradient", wt. %  7.00 Density at 20 ° С according to GOST 3900, kg / m ³ 999 Softening temperature according to GOST 11506, ° C 38 Conventional viscosity at 80 ° С according to GOST 11503, s 150

"Darkened" product in the amount of 18.0 m ³ / h is mixed with tar in a holding tank at a temperature of 100 ° C in a ratio of 90:10 wt. fractions when applying tar to 2.0 m ³ / h, to obtain a mixture with a conditional viscosity at 80 ° C for 13 s, from where the mixture is pumped into an oxidation column, in the lower part of which air is fed for oxidation in the amount of 96 nm ³ / m ^{3 of} raw mix at one o'clock. The bottom temperature in the oxidation column is kept at 250 ° C. From the bottom of the oxidation column remove the finished product in the amount of 19.3 m ³ / hour. The properties of the obtained bituminous binder in comparison with the prototype are presented in table 1.

Example 2

The fuel oil obtained in the processing of West Siberian oil is subjected to vacuum distillation to produce a “darkened” product and tar, which has the following characteristics:

"Blackout" product:

Temperature limits of boiling according to ASTM D 1160, ° С 430-580 The total content of paraffin-naphthenic and light aromatic hydrocarbons according to the methodology of the State Unitary Enterprise “INHP”, Ufa, determined on gas-liquid chromatograph "Gradient", wt. % 28.00 Density at 20 ° С according to GOST 3900, kg / m ³ 991 Softening temperature according to GOST 11506, ° C 32 Conventional viscosity at 80 ° С according to GOST 11503, s 20

Tar:

Asphaltene content according to the methodology of the State Unitary Enterprise “INHP”, Ufa, determined on gas-liquid chromatograph "Gradient", wt. % 3.2 Conventional viscosity at 80 ° С according to GOST 11503, s 70 Density at 20 ° С according to GOST 3900, kg / m ³ 997 Softening temperature according to GOST 11506, ° C 36

"Darkened" product in the amount of 12.0 m ³ / h is mixed with tar in a holding tank at a temperature of 150 ° C in a ratio of 60:40 wt. fraction when delivering tar to 8.0 m ³ / h, to obtain a mixture with a conditional viscosity at 80 ° C for 22 s, from where the mixture is pumped into an oxidative reactor of a special design, manufactured using the licensed Biturox technology from the Perner Engineergesellschaft m.b. . "(Austria). The reactor produces a three-stage dispersion of air along the height of the apparatus with the help of a mixer and special plates; water is supplied as part of oxidation air, evaporation of which removes heat of the oxidation reaction and ensures accurate maintenance of the temperature in the reactor. The air for oxidation in the reactor serves in the amount of 76 kg / ton of feed mixture per hour, water in the amount of 32 kg / ton of feed mixture per hour. The bottom temperature in the oxidation reactor is kept at 190 ° C, the pressure in the reactor is maintained at 0.01 MPa. From the bottom of the oxidation reactor remove the finished product in the amount of 19.5 m ³ / h. The properties of the obtained bituminous binder in comparison with the prototype are presented in table 1.

Example 3

Fuel oil obtained by processing a mixture of Surgut (70%) and Ukhta paraffin oil (30%) is subjected to vacuum distillation to obtain a "darkened" product and tar, having the following characteristics:

"Blackout" product:

Temperature limits of boiling according to ASTM D 1160, ° С 430-570 The total content of paraffin-naphthenic and light aromatic hydrocarbons according to the methodology of the State Unitary Enterprise “INHP”, Ufa, determined on gas-liquid chromatograph "Gradient", wt. % 33.67 Density at 20 ° С according to GOST 3900, kg / m ³ 989 Softening temperature according to GOST 11506, ° C 28 Conventional viscosity at 80 ° С according to GOST 11503, s sixteen

Tar:

Asphaltene content according to the methodology of the State Unitary Enterprise “INHP”, Ufa, determined on gas-liquid chromatograph "Gradient", wt. % 4.7 Conventional viscosity at 80 ° С according to GOST 11503, s 104 Density at 20 ° С according to GOST 3900, kg / m ³ 998 Softening temperature according to GOST 11506, ° C 37

"Darkened" product in the amount of 15.0 m ³ / h is mixed with tar in a holding tank at a temperature of 130 ° C in a ratio of 75: 25 wt. fractions when applying tar to 5.0 m ³ / h, to obtain a mixture with a conditional viscosity at 80 ° C for 17 s, from where the mixture is pumped into an oxidation column, in the lower part of which air is fed for oxidation in the amount of 84 nm ³ / m ^{3 of} raw mix at one o'clock. The bottom temperature in the oxidation column is maintained at 220 ° C. From the bottom of the oxidation column remove the finished product in the amount of 19.4 m ³ / h. The properties of the obtained bituminous binder in comparison with the prototype of the invention are presented in table 1.

As can be seen from table 1:

- polymer bitumen binder prepared from the proposed bitumen binder, obtained in the examples according to the invention 1-3, with the addition of 4% polymer styrene-butadiene-styrene brand DST-30-01 produced by Voronezhsintezkauchuk, has a tendency to staining according to EN 13301-1 -2010 at the level of 10-14 units, which is 2.62-3.68 times less than the prototype. In this bitumen binder fully meets the requirements of GOST 9548-74 for roofing bitumen of the brand BNK 45/190;

- saving of the deficient fraction of vacuum gas oil is from 1 to 20% per 1 ton of bituminous binder, which, with the release of 20,000 tons of bitumen binder per month, ranges from 200 to 4000 tons;

- saving "darkened" product of the vacuum distillation of fuel oil is from 9 to 20% per 1 ton of bitumen binder, which when released 20,000 tons of bitumen binder per month is from 1 800 to 4000 tons.

The proposed method of obtaining a bituminous binder allows the use of a binder for the production of high-quality rolled bitumen-polymer roofing material with good ductility, having a high resistance to sweating of oil fractions at temperatures above 40 ° C.

Claims (1)

The method of obtaining bituminous binder for roofing materials, including the oxidation of the “darkened” product of the vacuum distillation of fuel oil, characterized in that the “darkened” product of the vacuum distillation of fuel oil with a total content of paraffin-naphthenic and light aromatic hydrocarbons 28 -39 wt.%, Before oxidation, it is additionally injected with tar having a conditional viscosity at 80 ° C of 70-150 s, containing not more than 7 wt.% Asphaltenes, with the ratio of "darkened" prod kt: tar equal to 60-90: 10-40, and produce a mixing of the components at a temperature of 100-150 ° C.