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Fischer-Tropsch synthetic wax and its preparation method and preparation system

A technology for Fischer-Tropsch synthetic wax and wax paste, which is applied in the treatment of hydrocarbon oil, petroleum industry, hydrotreating process, etc., can solve the problems such as the preparation method of Fischer-Tropsch synthetic wax is not given, and achieves high yield and flexible quality control. , The effect of low energy consumption in the production process

Active Publication Date: 2020-10-02
CHNA ENERGY INVESTMENT CORP LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method only relates to solvent dewaxing and deoiling of light deasphalted oil of petroleum oil from the second line, the third line, the fourth line, vacuum residue or the raffinate oil refined by furfural of the above-mentioned feedstock oil, and no relevant Fischer-Tropsch method is given. Preparation method of synthetic wax

Method used

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  • Fischer-Tropsch synthetic wax and its preparation method and preparation system
  • Fischer-Tropsch synthetic wax and its preparation method and preparation system
  • Fischer-Tropsch synthetic wax and its preparation method and preparation system

Examples

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preparation example Construction

[0033] The invention provides a kind of preparation method of Fischer-Tropsch synthetic wax, the method comprises:

[0034] (1) Carry out pre-fractionation of raw material oil, collect boiling point i The super light fraction, boiling point at t i -t f Light fractions between and boiling points >t f The heavy distillate is used as heavy wax, where, t i is the fraction cut point and t set between 300-400°C f is the fraction cut point set between 480-540°C;

[0035] (2) using a dewaxing solvent to carry out solvent dewaxing to the light fraction to obtain a dewaxing filtrate and a wax paste;

[0036] (3) adopt degreasing solvent to carry out solvent degreasing to described wax paste, obtain light wax and wax lower oil;

[0037] (4) mixing the heavy wax and light wax to obtain blended wax;

[0038] (5) Hydrofining the blended wax.

[0039] The present invention also provides a Fischer-Tropsch synthetic wax preparation system applicable to the above method, the system compr...

Embodiment 1

[0097] This example is used to illustrate the Fischer-Tropsch synthetic wax of the present invention and its preparation method.

[0098] The raw material oil is Fischer-Tropsch synthesis full distillate wax, whose properties are shown in Table 1.

[0099] use figure 1 In the system shown, the raw oil is sent to the fractionation device 1 for fractionation, and 360°C and 500°C are respectively the fractionation cut-off temperature t i and t f , respectively obtain less than 360 DEG C too light distillate (discharge system), 360-500 DEG C light distillate and greater than 500 DEG C heavy distillate (being heavy wax HW1); The light fraction is sent to dewaxing unit 2 and deoiling unit 3 for dewaxing and deoiling respectively;

[0100] Wherein, the dewaxing solvent that adopts is identical with deoiling solvent, is the mixture of methyl ethyl ketone, toluene and secondary solvent, and the total content of methyl ethyl ketone and toluene (the weight ratio of methyl ethyl ketone...

Embodiment 2

[0110] According to the method described in Example 1, the difference is that the dewaxing solvent used is the same as the deoiling solvent, but the secondary solvent is only a mixture of water and ethanol with a weight ratio of 10:90, thereby obtaining light wax LW2, and Blend the wax BW2 to finally obtain the Fischer-Tropsch synthetic wax FT-W2 as the product wax.

[0111] Wherein, the relevant parameters of dewaxing and deoiling process are shown in Table 4;

[0112] Among them, the properties of light wax LW2, blending wax BW2 and Fischer-Tropsch synthetic wax FT-W2 are shown in Table 5.

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Abstract

The invention relates to the field of Fischer-Tropsch synthetic wax, in particular to a Fischer-Tropsch synthetic wax as well as a preparation method and a preparation system thereof. The method comprises the following steps: pre-fractionating raw oil, collecting an over-light fraction with boiling point less than t, a light fraction with boiling point between t and t<f>, and a heavy fraction with boiling point more than t<f> to serve as heavy wax, and performing solvent dewaxing on the light fraction with a dewaxing solvent to obtain dewaxing oil and wax paste; performing solvent de-oiling on the wax paste with a de-oiling solvent to obtain light wax and wax oil; mixing the heavy wax and the light wax to obtain blended wax; and performing hydro-refining on the blended wax. The preparation method of the Fischer-Tropsch synthetic wax disclosed by the invention can simply prepare the Fischer-Tropsch synthetic wax with low oil content at high yield, and has the advantages of flexible quality control, low energy consumption in the production process and the like.

Description

technical field [0001] The invention relates to the field of Fischer-Tropsch synthetic waxes, in particular to a Fischer-Tropsch synthetic wax and its preparation method and preparation system. Background technique [0002] Fischer-Tropsch synthetic wax is mainly composed of linear saturated high-carbon alkanes with a relative molecular mass of 500-1000, and the content of sulfur, nitrogen and aromatics is extremely low. This endows this specialty chemical with fine crystal structure, high melting point (generally higher than 85°C), narrow melting point range, low oil content, low penetration, low mobility, very low melt viscosity, high stability And hard, wear-resistant and other characteristics, due to the low content of sulfur nitrogen aromatic hydrocarbons and other impurities, good light stability, thermal stability, in line with the requirements of food and drug safety. [0003] With the advancement of fractionation, micronization and modification technology, high mel...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/00
CPCC10G67/00
Inventor 李丽金环年李景赵效洪高浩华艾军
Owner CHNA ENERGY INVESTMENT CORP LTD
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