Method for preparing base oil of lubricating oil by dewaxing

A technology for lubricating base oil and dewaxing, which is used in lubricating compositions, base materials, petroleum industry, etc., can solve problems such as unreported applications of direct cooling crystallization dewaxing, and improve processing capacity, technology and production equipment. Simple, low energy consumption

Inactive Publication Date: 2012-10-17
XINJIANG MODERN PETROCHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The above patents are similar to the present invention in that a certain proportion of mixed working medium is added to the raw material, and then the oil and wax are separated; but the difference lies in the principle and process of cooling crystallization, the application of direct cooling crystallization dewaxing in the field of lubricating base oil dewaxing No report

Method used

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  • Method for preparing base oil of lubricating oil by dewaxing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Heat the second-line wax oil to 35°C, and mix the heated wax oil with the liquid heat transfer medium of mass M (working condition P 1 , T 1 ) after fully mixing evenly, depressurize to P by throttling 2 , to vaporize the heat-removing working medium, and the system cools down to T under adiabatic conditions 2 , after the wax crystals are precipitated, they are sent to the filtration and separation system for filtration and separation to obtain lubricating oil base oil and wax products, see Table 2 for details. The gaseous heat transfer medium is pressurized to P 1 Condensate into a liquid state and cool down to T 1 spare.

Embodiment 2

[0026] According to the method of Example 1, the operating conditions were changed, and the properties of the obtained lubricating oil base oil and wax product were shown in Example 2 in Table 2 for details.

Embodiment 3

[0028] According to the method of Example 1, the operating conditions were changed, and the properties of the lubricating oil base oil and wax product obtained were shown in Example 3 in Table 2 for details.

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Abstract

The invention discloses a method for preparing base oil of lubricating oil by dewaxing. The basic technology route is: mixing uniformly raw material wax oil (component content) and a heat removing working medium (liquid state) at a state of a working condition 1 (P1, T1); enabling the heat removing working medium to be gasified for absorbing heat at a depressurization working condition P2 by a throttling depressurization mode; enabling a temperature of the mixing fluid to reduce to T2, such that wax crystallization contained in the raw material wax oil is precipitated; filtering and separating the solid wax, such that the dewaxing base oil is obtained; and recycling the gasified heat removing working medium after being compressed and condensed. A traditional scraper plate crystallizer technology is replaced by the technology of the present invention, with the technology provided in the invention, processing capability and crystallization efficiency of the apparatus can be improved. The technology is benefit for reducing maintenance engineering of equipment, enhancing stability of production, and energy saving and consumption reduction.

Description

technical field [0001] The invention relates to a method for preparing lubricating oil base oil and solid wax by dewaxing. Background technique [0002] Dewaxing technology mainly includes hydroisomerization, molecular sieve adsorption, urea complexation, bacterial decomposition, solvent dewaxing and other methods. Molecular sieve adsorption is suitable for low-viscosity light fractions, but not for relatively heavy vacuum distillates; urea complex dewaxing has the characteristics of no need to heat up and good selectivity, but it is only suitable for low-viscosity fractions, and the process is relatively complicated; bacterial decomposition The method can obtain dewaxed oil and biological protein feed at the same time, but it is only suitable for some lighter low-viscosity oils, and the efficiency of process equipment is not high; hydroisomerization can obtain high-quality lubricating oil with high viscosity index and low freezing point. However, the viscosity of the raw m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G31/06C10G73/02C10M101/02
Inventor 刘锦升姜涛杨文婷林向阳裴志疆张欢
Owner XINJIANG MODERN PETROCHEM IND
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