DD143626A1 - METHOD FOR PRODUCING DISTILLATION BITUMEN - Google Patents

Abstract

The invention relates to a process for the preparation of Distillation bitumen with improved quality tracers, in particular in the theological properties as well as with improved Yield balance, by admixing up to 30% by weight of residues of Petrol pyrolysis to, in particular paraffin-based, petroleum and their distillative workup, produces a bitumen improved quality characteristics. In addition, the yield is available distillation bitumen without increased Erdöleinsats increased as well as the energy required for the distillation lowered.

Description

I 2 909 - »-

Process for the preparation of distillation bitumen Field of application of the invention

The invention relates to a process for the production of distillation bitumen having improved quality characteristics, in particular in the theological properties and improved yield balances, in particular when using paraffin-based petroleum oils.

Characteristic of the known technical solutions

For bituminous road construction, building protection and similar fields of application, the distillation residues used in the distillative treatment of petroleum are used as important binders. Depending on the quality of the petroleum and its processing conditions bitumen of different quality characteristics are obtained, which are adapted to the respective desired application areas.

It is known that da.bei not every petroleum is equally well suited for the production of quality-compliant bituminous binder. Especially with paraffin-based earth

Oil is due to the relatively low content of asphaltenes. and resins as well as the high ..content of long-chain .paraffinic hydrocarbons often impossible, according to the known processing technologies quality. produce right distillery bitumen. '

The quality deviations relate primarily to the so-called Theological properties of bitumen such as penetration, softening point, breaking point, ductility and viscosity and their relations to each other.

These criteria and their relation, combined with the paraffin content of the bitumen, clearly determine their utility value. Oe stronger such deviations in quality, the lower the utility of the bitumen.

This results in the production of bitumen from paraffin-based and similar petroleum technological problems that are expressed both in a higher thermal load and in the decline in yield.

As asphalt basic oils, which generally do not experience such problems, are no longer available in sufficient quantities for the production of distillation bitumen, there has been no lack of attempts to demonstrate ways in which paraffinic base oils can be used to produce high quality commercial grade bitumens.

As solution variants, the addition of such bitumen have been proposed with numerous auxiliary and mixed components such as polymers of olefins and similar compounds, copolymers, rubber and rubber waste or surface and surface-active organic compounds.

In some cases, significant quality improvements were achieved, which even made it possible to develop distillation and mixed bitumen for applications with higher requirements.

Also achieved by the subsequent blowing with air or oxygen obtained by distillation of bitumen quality improvement.

However, the above methods have the great disadvantage that on the one hand the quality corrections are made by downstream processes and on the other hand high technological and procedural costs arise. In addition, the problems present in the primary distillation, especially in the thermal capacity of the petroleum can not be eliminated.

Object of the invention

It is an object of the invention to produce a distillation bitumen with improved performance properties in increased yield and in harder varieties, in particular from paraffin-based petroleum oils in a simple manner.

Explanation of the essence of the invention

The object of the invention is to exert direct influence on the quality and / or the bitumen yields of the resulting distillation residues by admixing auxiliaries, especially paraffin-based petroleum oils, before the distillation process.

According to the invention, the problem is solved in that the intended for distillation petroleum before processing 0.5 to 30 Ma. - Added % pyrolysis oil and this mixture is worked up together by distillation. By pyrolysis oil we mean a highly aromatic residue obtained by the thermal decomposition of paraffinic hydrocarbons in the production of alkene hydrocarbons.

Surprisingly, it has been found that the quality properties of the resulting bitumen, in particular their rheological properties, are substantially improved by this joint distillative workup.

Thus, for example, it is possible to increase the plasticity range, to lower the paraffin content, to correct possible distortions in the relation penetration / softening point and to shift the qualities to the harder product range at the same preheater temperatures.

The quality improvements in the use of paraffin-rich petroleum oils, from which no satisfactory bitumen qualities can often be obtained in the direct distillation process, are particularly significant.

In this way, the paraffin content can be substantially reduced and, at the same time, the relations penetration / softening point can be changed in the usual order of magnitude, while at the same time improving other essential bitumen criteria.

Simultaneously with the quality improvement of the distillation bitumen, a yield increase of bitumen is generally determined.

posed. Both the quality and the quantity of the bitumen result from the incorporation of the highly aromatic components of the pyrolysis oil into the colloid-chemical structure of the bitumen, which ultimately explains the increased serviceability of the bitumen.

"Therefore, these bitumen can be used for many bituminous construction in road construction, building protection, in the production of bituminous binder, in many special application areas with great success.

In addition, bituminous special grades can be prepared from these basic bitumen without any particular problems according to known but mostly simplified processes. So it is possible to produce in the downstream process or in the direct process so-called high vacuum bitumen, without the usual application of high vacuum.

It is also possible to produce special asphaltene-containing petroleum residues which are very well suited to the production of the most varied types of blown bitumen.

embodiments

With reference to embodiments, this invention will be explained in more detail.

Example 1;

An Egyptian petroleum of provenance Karean / Bakr is distilled n-oh known methods in the primary stage once alone and on the other hand in combination with 10 % pyrolysis oil directly on bitumen. The aim was in each case a bitumen grade B 90.

When processed alone, these penetration values became at a preheater exit temperature. of 340 ⁰ C in a yield of 40, reached 4 % . In combination with 10 % pyrolysis oil such values were already reached at a pre-heater outlet temperature of 320 ⁰ C in an average yield of 45.3 % .

Essential quality parameters of medium samples:

Distillation residue from Egyptian petroleum

Distillation residue from 90 % Egyptian petroleum and 10 % pyrolysis oil

Penetration 10 * " ¹ mm

85

90

Softening point (ring and ball) ⁰ C

Ductility at 25 ^° C.

Breaking point after feeding

paraffin content

46

85

- 10

47.5

over 100

- 13

2.4

 1.9

Example 2 :

Analogously to Example 1, a mixture of Egyptian petroleum with 10 % pyrolysis oil at a preheater temperature of 350 ⁰ C de-

distilled. There is a residue in a yield of 34.7 % with the following parameters:

-1 Penetration 10mm: 8 "

softening

(Ring and ball) ⁰ C: 72

Ductility at 25 ^° C.: 6 crushing point after feeding: 12

Example 3:

Analogously to Example 1, an Egyptian petroleum mixed with 20 % pyrolysis oil in the primary stage is distilled directly to bitumen at a preheater temperature of 340 C. There is a residue of 41.4 % of the following quality:

-1 Penetration 10 mm: 15

softening

(Ring and ball) ⁰ C: 68

Ductility at 25 ^° C.: 5 crushing point after feeding: 3

Example 4:

A mixture of 70 % of Soviet petroleum of provenance Romaschkino and 30 % of pyrolysis oil is converted by simple atmospheric distillation to a petroleum residue with a petroleum residue.

-1 netration of 300 10 mm distilled.

The residue with a flash point below 250 ⁰ C is blown by known methods.

The result is a blown bitumen with the following properties: ·

-1 Penetration 10 mm: 38 softening point

(Ring and ball) ⁰ C: 86

Breaking point after feeding: - 20 ductility at 25 ⁰ C: 3

Claims (3)

invention claim 1. A process for the production of distillate bitumen according to known distillation processes for crude oils, characterized in that for the production of bitumen, a mixture of petroleum and 0.5 to 30 wt .-% of highly aromatic residues which are obtained in the pyrolysis of paraffinic hydrocarbons to alkenes . 2. The method according to item 1, characterized in that hard to spring hard bitumen qualities are produced by direct atmospheric distillation. 3. The method according to item 1, characterized in that a - 1 petroleum residue in the penetration range 200 - 350 10 mm produced and then blown by known methods.