Raw oil optimization method for improving environment-friendly rubber filling oil aromatic hydrocarbon content and equipment

Abstract

The invention belongs to the technical field of petrochemical engineering and discloses a raw oil optimization method for improving environment-friendly rubber filling oil aromatic hydrocarbon content and equipment. The method includes: performing solvent refining in a counter-current extraction tower by taking heavy lubricating oil solvent extract oil as raw oil, recovering solvent from tower top raffinate liquid by means of steam stripping so that environment-friendly high-aromatic-hydrocarbon rubber filling oil is obtained, and enabling part of raffinate oil or raffinate liquid to enter the extraction tower from a raw oil inlet to the lower portion of a solvent inlet, wherein the mass ratio of the raffinate oil or the raffinate liquid to the raw oil is 0.1 to 2.0:1.0; and recovering solvent from extraction tower bottom extract by means of evaporation and steam stripping so that extract oil is obtained, enabling part of the extract oil to mix with the extract at a bottom circulation extraction outlet of the extraction tower, and enabling the mixture to enter the extraction tower from a bottom circulation inlet of the extraction tower after cooling, wherein the mass ratio of the extract oil entering bottom circulation to the raw oil is 0.2 to 2.0:1.0.

Description

technical field [0001] The invention belongs to the field of petrochemical technology, and in particular relates to a raw material oil optimization method and equipment for increasing the content of aromatic hydrocarbons in environmentally friendly rubber filler oil for synthetic rubber and tires. Background technique [0002] In the production and processing of rubber products such as tires, in order to improve the processing performance of the rubber compound, it is usually necessary to add a certain amount of rubber filler oil. my country is a big country in tire production, and its exports have grown rapidly in recent years. However, due to the fact that there is no environmental protection standard for tires in China, some tire manufacturers choose non-environmental protection rubber filling oil, which not only affects the environment, but also affects tires due to the failure of environmental protection indicators. Export, but the use of imported environmentally friendl...

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Problems solved by technology

[0009] Using the existing solvent refining technology, if the polycyclic aromatic hydrocarbon content (PCA) and the total content of 8 kinds of harmful aromatic compounds in the refined oil meet the requirements of the EU Environmental Protection Directive 2005 / 69 / EC environmental protection indicators, the aromatic carbon content of the refined oil will be low , can not meet the performance requirements of the tire industry for environmentally friendly rubber oil; if the aromatic content of the refined oil meets the tire industry requirements for the performance of environmentally friendly rubber oil, the polycyclic aromatic hydrocarbon (PCA) content of the refined oil and 8 kinds of harmful aromatics The total content of family compounds cannot meet the requirements of the EU Environmental Protection Directive 2005 / 69 / EC environmental indicators

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