System and method used to produce lubricating oil base oil and high melting point Fischer-Tropsch wax

Abstract

The invention provides a system and a method used to produce lubricating oil base oil and high melting point Fischer-Tropsch wax. The system includes a first vacuum distillation column, a second vacuum distillation column, an isomeric dewaxing reactor, a third vacuum distillation column and a fourth vacuum distillation column, wherein the first vacuum distillation column distillates a first fraction with a distillation range below 350 DEG C and a second fraction with a distillation range above 350 DEG C; the second vacuum distillation column distillates the second fraction to obtain a third fraction with a distillation range between 350-550 DEG C and a fourth fraction with a distillation range above 550 DEG C; the isomeric dewaxing reactor performs a hydrogenation isomeric reaction on the third fraction to obtain the lubricating oil base oil; the third vacuum distillation column distillates the fourth fraction generated by the second vacuum distillation column to obtain a first Fischer-Tropsch wax fraction with a melting point below 80 DEG C and a second Fischer-Tropsch wax fraction with a melting point above 80 DEG C; the fourth vacuum distillation column distillates the second Fischer-Tropsch wax fraction to obtain a third Fischer-Tropsch wax fraction with a melting point between 80-105 DEG C and a fourth Fischer-Tropsch wax fraction with a melting point above 105 DEG C. The system and method can produce the lubricating oil base oil and Fischer-Tropsch wax with a high melting point. The system and the method are simple, and high in production efficiency and good in produced products.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, in particular to a system and method for producing lubricating oil base oil and high-melting Fischer-Tropsch wax. Background technique [0002] Lubricating oil is an indispensable auxiliary chemical in industrial production, and lubricating oil base oil is an indispensable raw material for formulating lubricating oil. With the rapid growth of consumption in my country's automobile and machinery industries, it has driven the rapid growth of domestic base oil demand for lubricating oil consumption. At present, there is insufficient base oil for domestic lubricating oil production, which needs to be solved by importing. Lubricating oils made from common low-end base oils have poor low-temperature performance and high aromatic content, while high-viscosity ester oils have good performance. Although they can make up for a certain gap, the cost is too high. [0003] The vast majority of waxes on...

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Problems solved by technology

[0008] The above-mentioned existing methods all take the production of lubricating oil base oil or high melting point wax as the main purpose, and the production product is relatively single, and in the method of taking the production of lubricating oil base oil as the main purpose, it does not consider that the long carbon chain Fischer-Tropsch synthetic wax is easier to zeolite The problem of cracking and converting into linear small molecules, that is, in the method mainly aimed at producing lubricating oil base oil, the long carbon chain Fischer-Tropsch synthetic wax (ie heavy wax) with a melting point greater than 80 ° C needs to be cracked, but It is easier for zeolite to be cracked and converted into small straight-chain molecules during cracking treatment, but small straight-chain molecules cannot be used as components of lubricating oil base oils, so raw materials cannot be fully utilized, resulting in waste of raw materials

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