Bitumen manufacture process

FIELD: manufacture of road building materials.

SUBSTANCE: process comprises compounding lacquering bitumen (trade mark "G", 75-95%) with road bitumen (10-25%) characterized needle penetration depth 65-110 dmm (25°C) and stretchability 150 cm at 25°C. Bitumen of mark G is preliminarily reduced to fragments and compounding is carried out for 30-45 min at 170-180°C.

EFFECT: simplified bitumen manufacture technology and enabled control of quality of hot asphalt-concrete mixes.

4 tbl, 9 ex

 

The present invention relates to the technology of producing materials used for the construction of roads, in particular to technology for refining in road-building organizations for operational quality control of asphalt mixtures, in particular directly in the preparation of road building materials.

A method of obtaining bitumen by deep oxidation of heavy oil residue, followed by mixing (compounding) formed perechislennogo product is not oxidized oil residue, after which the resulting mixture was subjected to vacuum distillation (see USSR author's certificate No. 446531, MKI With 10 3/04, published 15.10.1974).

The disadvantage of this known invention is the complexity of the technological process of obtaining bitumen, which can only be used at the refineries. This is due to the presence of vacuum distillation of the mixture, which, in turn, eliminates the possibility of using such a known method of producing bitumen directly in road-building organizations.

A known method of producing bitumen, including compounding trademarks of bitumen from the oil refining product, and initially produce deep oxidation of heavy oil residue, and then conduct it is imponderabilia by product of oil refining, which is used is not oxidized oil residue, the resulting perechislennogo product use the product bitumen, known as lacquer bitumen grade “G”, and as the oxidized oil residue using petroleum tars from the group of oils, for example, Yarega, West-Siberian and Courtemanche in the following ratio, wt.%: commodity bitumen grade “G” 17-46; oil tars from the group mentioned oil - the rest. It should be noted that the process of compounding is carried out at 145-175°and mixing time is not less than 10 minutes (see RF Patent №2130044, MKI With 10 3/04, published in bull. No. 13 from 10.05.1999.)

It is known for the invention is selected as a prototype, because it has the largest number of total essential features with the claimed invention, and is the latest development in this field.

Compared with similar prototype has the advantage because it simplifies the process and allows for a shorter period of time to get the bitumen on-site extraction and processing of oil. However, a marked advantage at the same time is a significant drawback, since this known method of producing bitumen cannot be used in road construction, i.e. directly in the field of preparation of road building mater what Alov. In addition, in this way you can receive bitumen only with high penetration (>99). Meanwhile, for the construction of pavements in different regions of Russia using bitumen with A25 in the range of 50-90, due to the climatic conditions of Russia.

The present invention is to provide a method for production of road bitumen, which could be used in road-building organizations for the preparation required for the bitumen, controlling the quality of hot asphalt mixes. In addition, it was necessary to have a simple technology.

The problem is solved so that the known method of production of road bitumen for mastic asphalt by compounding lacquer bitumen grade “G” with the product refining of crude oil, ACCORDING to the present invention, as oil refining product use road bitumen with a penetration depth of the needle at 25°65-110 mm 10-1and elongation at 25°150 cm or more in the following ratio of components, wt.%:

lacquer bitumen grade “G” 75 -90

the above road bitumen 10 -25,

when this varnish bitumen grade “G” pre-crushed, and the compounding is carried out at 170-180°C for 30-45 minutes.

This new technical solution to all your set of essential features which allows you to get way which road-building organizations will be able to control the quality characteristics of bitumen and asphalt mixtures.

Compared with the prototype of the invention has significant differences, and spent the analysis of scientific-technical and patent information showed that the proposed set of distinctive features is unknown. Therefore, the present invention may be considered as new.

The claimed invention involves an inventive step, as it is for the expert does not follow logically from the known levels of technology. However, some significant features known in the other set of features. So, you know “...mixing bitumen of various properties and nature achieve change their main physico-chemical parameters.... From bitumens of different types receive a mixture whose properties do not have a pronounced dependence on the properties of their constituent components. Mixing lead with the solvents; the penetration, emulsification and other methods”. As a result, in the United States by compounding the original bitumen continuously mixed with other original bitumen in the flow, i.e. in the conditions of the refinery on its production lines. (See Rebgun. Petroleum bitumen Publishing house “Chemistry”, Moscow, 1973, str -266). However, these recom is ndali are General in nature and require a large number of experiments, to successfully choose the right components and use them to get the bitumen required, for example, viscosity. In our case revealed that the lacquer bitumen grade “G” can be smashin with very large numbers of commodity bitumen. Thus formed mixture of new bitumen desired viscosity and desired penetration; and with other key characteristics that meet the appropriate asphalt mix. In addition, the physical condition of bitumen grade “G” is also beneficial for our case, namely the solid bitumen and he shredded with the formation of appropriate forms, for example in the form of tablets, which during transportation and storage are not are sintered, and the introduction of the melt another bitumen easily dissolve and form a single mixture of the desired properties. In addition, the tablet form is convenient for packaging and use. So if there is accidental rupture of the package, the tablet will not diverge from the packaging. While spherical particles of solid bitumen ukatyvayutsya far. Thus, the claimed invention involves an inventive step.

Practical applicability is illustrated below by examples, and the way in its implementation does not require explanation, as the process of compounding is well known by specialists and in this case is it has no features. However, to begin with present the characteristics of the raw materials.

As one of the components used lacquer bitumen grade “G” is a product of the oxidation of atmospheric residue vacuum distillation vysokomolecul, malabaristas oil Yarega field. Properties of lacquer bitumen grade “G”: penetration at 25°S - 4.0 mm 10-1; softening temperature - 132°C. Pre-crushed and the particles have the form of tablets with a diameter of 1.2-1.5 cm, due to the technological possibilities of the equipment and the usual sizes of tablets used in the everyday life of man.

As the source of the bitumen used, for example, bitumen characterized by a penetration depth of the needle at 25°78-110 10 mm-1and elongation at 25°150 cm or more, for example commodity bitumen grades: bitumen, BDU 7/100 (TU 38.1011356-91 “Bitumen road improved BDU”), BUS (TU 0256-096-00151807-97 “Batumi oil improved road from the West Siberian oil”).

The BDU 50/70 with penetration 65 mm 10-1obtained by the oxidation of tar Yarega oil;

The BDU with 70/100 penetration 78 mm 10-1obtained by the oxidation of tar Yarega oil;

BCUS with 70/100 penetration 86 10 mm-1derived from residues of processing a mixture of West-Siberian oil;

The BDU 100/130 with penetration 110 mm 10-1obtained by the oxidation of the tar Argscount.

Example 1

Compounding was exposed to bitumen grade BDU 70/100 and varnish bitumen grade “G” in the amount of respectively 90 and 10% of the mass.

Compounding was carried out at a temperature of 175°C, mixing time was 30 minutes.

Example 2

Compounding was exposed to bitumen grade BDU 70/100 and varnish bitumen grade “G” in the amount of respectively 85 and 15% of the mass.

Compounding was carried out at a temperature of 178°With time shuffle was 30 minutes.

Example 3

Compounding was exposed to bitumen grade BDU 70/100 and varnish bitumen grade “G” in the amount of respectively 80% and 20% of the mass.

Compounding was carried out at a temperature of 180°C, mixing time was 45 minutes.

Example 4

Compounding was exposed to bitumen grade BDUS 70/100 and varnish bitumen grade ″D" in the amount of respectively 80% and 20% of the mass.

Compounding was carried out at a temperature of 172°C, mixing time was 30 minutes.

Example 5

Compounding was exposed to bitumen grade BDUS 7/100 and varnish bitumen grade ″D" in the amount of respectively 75 and 25% of the mass.

Compounding was carried out at a temperature of 177°C, mixing time was 40 minutes.

Example 6

Compounding was exposed to bitumen grade BDU 100/130 and varnish bitumen grade ″D" in the amount of respectively 85 and 15% of the ACC.

Compounding was carried out at a temperature of 170°C, mixing time was 30 minutes.

Example 7

Compounding was exposed to bitumen grade BDU 100/130 and varnish bitumen grade ″D" in the amount of respectively 80% and 20% of the mass.

Compounding was carried out at a temperature of 170°C, mixing time was 30 minutes.

Example 8

Compounding was exposed to bitumen grade BDU 50/70 and varnish bitumen grade G” in the amount of respectively 90 and 10% of the mass.

Compounding was carried out at a temperature of 170°C, mixing time was 30 minutes.

Example 9

Compounding was exposed to bitumen grade BDU 50/70 and varnish bitumen grade G” in the amount of respectively 85 and 15% of the mass.

Compounding was carried out at a temperature of 170°C, mixing time was 30 minutes.

The results obtained are summarized in tables 1, 2 and 3, 4, which are provided at the end of the description.

Analysis of laboratory test results obtained compounded bitumen (table 1, 2, 3, 4) showed that the introduction of commodity road bitumen bitumen varnish brand “G” can be obtained bitumen characterized by high heat resistance and strength, as evidenced by higher values of the softening temperature and low - penetration.

So, based on the product bitumen with PE is Etruria 70-100 mm 10 -1the obtained viscous bitumen with penetration 35-50 mm 10-1that is achieved when the content of lacquer bitumen grade “G” in the range of 10-25% of the mass.

Bitumen grades BDU (BDUS 50/70, BDU (BDUS) 35/50 used in the composition of high-strength pavements, such as mastic asphalt. Because of the difficulties arising during unloading and reloading in the raw capacity of high-viscosity bitumen, centralized supply of asphalt bitumen production of these brands is difficult. In addition, the amount of work for laying mastic asphalt, as a rule, are not so great that collectively determines the feasibility of organizing the production of high-viscosity bitumen directly at the production sites of asphalt production or in its immediate vicinity, in order to eliminate the stage of handling and storage of bitumen. Pill resistant to caking, form lacquer bitumen grade “G” allows the flexibility to implement directly on PAR as the storage of bitumen varnish brand ″D″and the cooking process if necessary with the use of the required quantity of high-viscosity compounded bitumen. The second component for compounding and road bitumen characterized by a penetration in the range 65-110, always available at any ART, since the use is : to make a traditional hot asphalt mixes.

Combining bitumen with penetration 65-110 mm 10-1with lacquer bitumen grade “G”, you can get more viscous and heat-resistant bitumen with a penetration in the range of 35 mm to 10-1that allows road-building organizations to efficiently manage quality hot asphalt mixes based on their destination through the use of bitumens of different viscosities.

Table 1
Name of indicatorRequirements for bitumen for mastic asphaltProperties compounded bitumen, cooked FOOD 70/100, when the content of the lacquer bitumen, % mass
0101520
The depth of needle penetration at 25°C, 10 mm-135-5078484235
Softening temperature, °50-5847545860
The elongation at 25°cm-More than 150More than 1507644

The way p the receipt of road bitumen, for example, for mastic asphalt by compounding lacquer bitumen grade “G” with a petroleum derivative, characterized in that the quality of the product refining use of road bitumen with a penetration depth of the needle at 25°65-110 mm 10-1and elongation at 25°150 cm or more in the following ratio, wt.%:

Lacquer bitumen grade “G” 75-90

The above road bitumen 10-25,

when this varnish bitumen grade “G” pre-crushed, and the compounding is carried out at 170-180°C for 30-45 minutes



 

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