Production method of environmentally-friendly rubber filling oil

Abstract

The invention discloses a technology for producing environmentally-friendly rubber filling oil by using RFCC (residue fluid catalytic cracking) slurry. The technology comprises the following specific steps: performing liquid-solid separation on catalyst particles in the slurry by utilizing a rotary liquid separation method, and carrying out hydrogenation reaction on the overflows of a cyclone by virtue of a slurry-bed hydrogenation reactor; after the reaction, introducing the hydrogenation product in a first extraction tower so as to be subjected to two-solvent extraction, wherein the slurry enters the middle of the extraction tower, a solvent I enters from the lower part of the extraction tower, a solvent II enters from the upper part of the extraction tower, the three materials perform counter-current contact in the tower, a primary refining solution is obtained from the top of the tower; directly feeding the primary refining solution into the lower part of a second extraction tower so as to perform counter-current contact with a solvent III coming from the upper part, thus a secondary refining solution is obtained from the top of the tower; and carrying out steam stripping on the secondary refining solution to recycle the solvent, thus obtaining secondary refined oil, namely the environmentally-friendly rubber filling oil. The rubber filling oil produced in the technology meets the environmental standards of the European Union, and has the advantages of good solubility to rubber, high yield and very good market application prospect.

Description

Technical field: [0001] The invention belongs to the field of petroleum and petroleum fraction refining, and relates to a process for producing environment-friendly rubber filling oil by using catalytic cracking oil slurry. Background technique: [0002] In order to cope with the adverse effects of increasingly heavy raw materials on the operation of catalytic cracking units, refineries mostly adopt the method of throwing oil slurry outside. These external oil slurries are generally burned as fuel oil, and the economic benefits are low. In today's increasingly tight oil resources, it has caused a great waste of resources. Therefore, it is necessary to comprehensively utilize the catalytic cracking oil slurry. [0003] Domestic refineries use catalytic cracking oil slurry to produce aromatic rubber extension oil. Rubber extension oil is one of the important raw materials for rubber processing, which is divided into aromatic type, naphthene type and paraffin type. Among them,...

AI Technical Summary

Problems solved by technology

The application document with the patent publication number CN101597512A proposes a refining method. The third-line raw material oil and furfural are contacted countercurrently in the extraction tower, and the extracted liquid at the bottom of the tower recovers the solvent to obtain the extracted oil. The refined oil obtained by the secondary extraction is environmentally friendly rubber oil; the patent application with the publication number CN101597513A proposes another refining method, that is, the third-line raw material oil and furfural are countercurrently contacted in the extraction tower, and the refined liquid is obtained from the top of the tower after the solvent is recovered. The refined oil is obtained, and then the refined oil is extracted twice, and the obtained extracted oil is environmentally friendly rubber oil. These two patent applications first need to recover the solvent from the extracted liquid or refined liquid, and then perform secondary extraction, which requires multiple extractions and solvent recovery, high energy consumption and large equipment investment

The method described in this patent has no industrial test report so far; because the toxic PCA content of catalytic cracking oil slurry is high, the method of simply using physical extraction must be repeated many times to make the product quality qualified, which not only increases equipment investment, but also makes the process complicated. The increase in cost also leads to a decrease in product yield

Images