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Process for hydrogenation of wax and process for production of fuel base

A hydrotreating and hydrocracking technology, which is applied in the treatment of hydrocarbon oil, hydrocarbon oil treatment products, chemical instruments and methods, etc. Yield of n-paraffin content and the effect of improving catalytic activity

Active Publication Date: 2012-06-20
NIPPON OIL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, in light oil, if the n-paraffin content increases, the low-temperature fluidity will deteriorate, and when the low-temperature fluidity is the worst, the use as a commodity will be limited.
Since light oil produced in FT synthesis is almost all n-alkanes, it is difficult to use it directly

Method used

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  • Process for hydrogenation of wax and process for production of fuel base
  • Process for hydrogenation of wax and process for production of fuel base

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] FT wax (carbon number 20-80, carbon number 21 or more normal paraffin content: 95% by mass) was prepared as a raw material for hydrocracking. In addition, silica-alumina (alumina content: 0.16 mol%) and alumina binder are mixed according to the mass ratio of 80:20, and after being shaped into a cylindrical shape with a diameter of about 1.5mm and a length of about 3mm, at 500°C Calcined at lower temperature for 1 hour to obtain a catalyst carrier. The obtained catalyst support is impregnated with a mixed aqueous solution of chloroplatinic acid and tetraamminepalladium dichloride, dried at 120°C for 3 hours, and then calcined at 500°C for 1 hour, thereby preparing a hydrocracking catalyst. On the catalyst support , based on the total amount of the catalyst, according to the ratio of platinum: palladium mass ratio of 90:10, 0.8% by mass of platinum and palladium are loaded.

[0050] Next, 200 ml of the above-mentioned catalyst was filled in a fixed-bed reactor, and metal...

Embodiment 2

[0055] As the raw material in the second step, except that the middle distillate having 9 to 22 carbon atoms (alkane content of 9 to 20 carbon atoms: 89% by mass) produced in the FT synthesis was used instead of the light alkane A, the same method as in Example 1. The hydrogenation treatment in the first to third steps above is carried out in the same manner. Table 1 shows the respective reaction temperatures in the above-mentioned series of hydroprocessing, the normal paraffin content (indicator of isomerization) and the yield of the product oil having a boiling point of 145 to 360°C.

Embodiment 3

[0057] The hydroprocessing of the above-mentioned 1st - 3rd process was performed similarly to Example 1 except that the reaction temperature at the time of hydroprocessing light alkane A in the 2nd process was 335 degreeC. Table 1 shows the respective reaction temperatures in the above-mentioned series of hydroprocessing, the normal paraffin content (indicator of isomerization) and the yield of the product oil having a boiling point of 145 to 360°C.

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Abstract

A process for the hydrogenation of wax, which is characterized by comprising the first step of hydrocracking a raw material wax containing at least 70% by mass of n-paraffins having 16 or more carbon atoms by bringing the wax into contact with a catalyst comprising a carrier containing an amorphous solid acid and a group VIII metal of the periodic table supported on the carrier in the presence ofhydrogen, the second step of changing temporarily the raw material from the wax to a light paraffin containing at least 60% by mass of paraffins having 9 to 21 carbon atoms and hydrocracking the light paraffin by bringing it into contact with the catalyst in the presence of hydrogen, and the third step of changing the raw material from the light paraffin to the same wax as used in the first step and hydrocracking the wax by bringing it into contact with the catalyst in the presence of hydrogen.

Description

technical field [0001] The present invention relates to a method for hydrotreating wax and a method for producing a fuel substrate. Background technique [0002] In recent years, from the standpoint of environmental protection, restrictions on sulfur content in liquid fuels such as gasoline and light oil have rapidly become stricter. Therefore, expectations for clean liquid fuels low in sulfur components or aromatics are increasing. One of the methods for producing such a clean fuel includes a Fischer-Tropsch ((FT)) synthesis method in which carbon monoxide and hydrogen obtained by gasification of coal or pitch or reforming of natural gas are used as raw materials. According to the FT synthesis method, it is possible to manufacture liquid fuel base materials rich in alkanes and free of sulfur components, and waxes (FT waxes) can also be produced at the same time. In turn, FT waxes can be converted to middle distillates (kerosene or light oil bases) by hydrocracking. [00...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G47/14B01J23/44B01J38/10C10G47/36C10G49/04
CPCC10G2400/04B01J23/42B01J21/12C10G2400/08C10G2300/1022C10G2400/06B01J23/44C10G47/00B01J37/0009
Inventor 关浩幸东正浩
Owner NIPPON OIL CO LTD