RU1796653C - Process for preparing paving bitumen - Google Patents

Abstract

Use: petrochemicals. SUBSTANCE: oil tar mixed with pitch based on crude oil in an amount of 3-25% is oxidized at 240-260 ° C. 2 tab.

Description

The invention relates to methods for producing bitumen and may find application in the oil refining industry.

The aim of the invention is to improve the quality of bitumen, its output and reduce the time of oxidation.

The goal is achieved in a method for producing bitumen by oxidizing a mixture of tar and oil pitch in the following ratio of components, wt.%: Tar 75-97; oil pitch 3-25.

Oxidation was carried out at the industrial installation of the NBNZ them. V. Ilyich with a capacity of 100 t / raw. The oxidation temperature is 240-260 ° C. Air consumption 3000 m / h. Oxidation was carried out until a softening temperature of 55 ° C was reached.

The production mode of the used pitch b, depending on the raw material used, is given in Table 1.

The characteristics of the components of the oxidation feed are given in Table 2.

EXAMPLE 1 A mixture of tar and oil pitch from one of the oil residue, taken in an amount of 2 wt%, was oxidized at 250 ° C.

Example 2. A mixture of tar and oil pitch from one of the oil residue, taken in an amount of 3 wt.%, Was oxidized at 240 ° C.

EXAMPLE 3. A mixture of tar and oil pitch of one from the oil residue, taken in an amount of 10 wt.%, Was oxidized at 2 ° C.

Example 4. A mixture of tar and oil pitch of one of the oil residue, taken in an amount of 15 wt%, was oxidized at 240 ° C.

EXAMPLE 5. A mixture of tar and oil pitch of one of the oil residue, taken in an amount of 20 wt.%, Was oxidized at 250 ° C.

Example 6. A mixture of tar and oil pitch from one of the oil residue, taken in an amount of 25 wt%, was oxidized at 260 ° C.

When oil pitch is added in an amount exceeding 25%, the oxidation time increases and the quality of the target product deteriorates.

Carrying out the oxidation process at temperatures below 240 ° C increases the time

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m of oxidation, and carrying out a process above 260 ° C reduces the quality of the product being produced.

Each of the above examples consists of 4 experiments, in each of which the oil pitch of one of the residues is used: either a pyrolysis resin, or a distilled cracked residue, or an extract from selective purification, oils, or tar.

The quality indicators of bitumen produced according to examples 1-6, as well as the values of bitumen yields and oxidation time are given in Table 3, where similar values for the prototype are given for comparison. When carrying out the process of Examples 2-6, the oxidation time is shortened and the quality of bitumen is improved: the oxidation time is 5.5-6.4 hours (versus 6.2-9.1 hours for the prototype); ductility 58-76 (against 43-60); penetration 63-74. (versus 54-64), Bitumen yield 74-85%. V.

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The best results were obtained with the oxidation of Example 4, and especially with the use of petroleum pitch of pyrolysis resin. The oxidation time is 5.5 hours, bitumen yield 85%, ductility at 25 ° C 76 cm, penetration 74 (OL mm), softening temperature 55 ° C, brittleness temperature -20 ° C.

Formula and Method for the production of road bitumen by oxidation of oil tar mixed with a hydrocarbon additive at elevated temperature, and so on, with the aim of to reduce the oxidation time, increase the yield of the target product and its quality, the pitch is based on petroleum feed in the amount of 3.0-25.0 wt%; and oxidation is carried out at 240-260 ° C .:

Table 1

table 2

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