SU1694623A1 - Method of producing binder - Google Patents

Abstract

The invention relates to the processing of bitumen and tar, in particular the preparation of a tamper for road construction. The goal is to improve the quality of the target product. To do this, the oil tar is re-oxidized, followed by mixing the obtained product with a thinner — a by-product of the absorption oil regeneration process while trapping the benzene of the coke-chemical production. At the same time, 10-15 wt.% Of bottoms of distillation of crude benzene is additionally introduced into the feedstock, and the re-oxidation process is carried out to the depth of needle penetration of the obtained product at 25 ° C, equal to (15-25) 9.1 mm, its caching is at least 70 ° C. The liquefaction process is carried out to the depth of penetration of the needle of the target product at 25 ° C equal to at least SO 001 mm. The resulting product has a water resistance coefficient higher than the known by 10 relative% and a compressive strength of 4 and 50 ° C. , 5 and 1.65 against 4 and 1.2 MPa in the known case 4 tab. u fe

Description

The invention relates to a method for receiving a tent for road construction works and can be used in the construction industry.

The purpose of the invention is to improve the quality of the target product.

The invention is illustrated by the following examples.

The residual distillation of raw benzene (KORSB) used in the process is a viscous liquid (Szo from 20 to 100 s). They contain up to 16% by weight of fractions distilled to 270 ° C and not more than 25% by weight of fractions distilled to 300 ° C. After selection of these fractions, the softening temperature of the residue is at least 15-20 ° C. The content of substances insoluble in toluene can reach 20% by weight, phenols 4% by weight, naphthalene up to 5-6% by weight, ash up to 7% by weight, water up to 1% by weight.

The benzene separation polymers (PBO) used are formed in the process of regenerating the absorption oil during the capture of benzene and are products of the polymerization of oil mixed with its high boiling fractions. This by-product has a density of 1.19-1.24 g / cm3, the viscosity of Szos10 is about 15 s, the softening temperature is 50-80 ° C, during fractional distillation to a temperature of 70 ° C,

Ch

ABOUT

Jb

Os

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not more than 2 wt.%, up to a temperature of 270 ° C - not less than 10 May. %, up to 300 ° C - about 25-30 wt.%.

Used direct tar (bitumen raw material) is a residual product of oil refining (distillation of light gasoline and oil fractions from oil).

Physico-mechanical parameters used in the described examples of the starting products are given in table. one.

The method is carried out as follows.

An additive KORSB is introduced into the tar heated to 55-60 ° C and, after co-drying (dehydration), the reaction mixture is oxidized at 190-200 ° C until the over-oxidized product (ASC asphalt-resinous concentrate) is obtained with a needle penetration depth of 15- 25x0.01 mm and a quench softening temperature of at least 70 ° C. The resulting product is diluted at 140-160 ° C by mixing with air defense to bitumen with a needle penetration depth at 25 ° C not less than 100x0.01 mm.

In tab. 2 shows the quality of ASA, obtained by adding to the original tar 10 wt.% KORSB (example 1), 15 wt.%, KORSB (example 2) and 10 wt.% KORSB (example 3).

The penetration depth of the needle obtained by the ASC is 15, 20 and 25x0.01 mm, respectively,

The resulting products are diluted by mixing with PBO, taken in an amount of 10-30 wt.%.

In this case, in examples 4 and 5, the ASC of example 1 is used. The amount of PBO in the example is 4–20 wt.%, In example 5–30 wt.%. In examples 6 and 7, the ASC of example 2 is used. The amount of PBO in the example is 6-10 wt.%, In example 7-30 wt.%. In examples 8 and 9, the ASC of example 3 is used. The amount of PBO in example 8 is 10% by weight and 30% by weight.

The quality of the received in the ring is given in table. 3

As can be seen from the data table. 3, the proposed method allows to improve the quality of bitumen. So, from the comparison of examples 6 and 10 it can be seen that with the same grade of bitumen BND 90/130 and the depth of penetration of the needle

(100x0.01 mm) the softening temperature of the binder obtained by the proposed method is higher and the brittleness temperature is 10% lower. The extensibility at 25 ° C in the preceding example 6 is 15% higher, and at 0 ° C it is 50% higher.

For bitumen grade BND 200/300 (the depth of penetration of the needle in perishing at 25 ° С in example 5, in example 12

280 and 290 × 0.01 mm), the softening temperature of bitumen in Example 5 is higher than 15 rel.%, brittleness is 15 rel. lower than stretching, at 25 ° С higher by 10 rel.%, at 0 ° С higher by 50 rel.%

In tab. 4 shows the data of physical and mechanical properties of asphalt concrete, prepared on these bitumens of examples 6 and 10.

The data table. 4 show that the strength characteristics of the mixtures on bitumen obtained by the proposed method are higher than on bitumens prepared by a known method by 10 relative% at 20 ° C and 35 relative% at 50 ° C. Besides,

the resulting mixtures have a higher corrosion resistance (water resistance coefficient is higher by 10 relative%).

Claims (1)

Invention Formula The method of producing a resident for road construction by over-oxidizing the oil tar, followed by mixing the over-oxidized product with a liquefier based on liquid organic products, characterized in that, in order to improve the quality of the target product, 10-15 wt.% of the bottoms of crude benzene distillation are additionally introduced into the feedstock, thinning agent uses a by-product of the absorption oil recovery process when trapping benzene at the coke-chemical production, the re-oxidation process is carried out to the needle penetration depth at 25 ° C, equal to 15-25x9.01 mm, its softening temperature at least 70 ° C and the process liquefaction is carried out to the depth of needle penetration of the target product at 25 ° C equal to at least 100x0.01 mm. Table 1 table 2 Table 3 Table 4