Method for producing diesel oil and chemical materials by f-t synthetic wax

A production method and technology of chemical raw materials, applied in the field of clean diesel oil and chemical raw materials, can solve the problems of not being an ideal source of raw materials for lubricating oil base oils and high content of straight-chain hydrocarbons, so as to reduce gas production, increase diesel yield, and reduce secondary The effect of secondary reactions

Inactive Publication Date: 2008-05-14
SYNFUELS CHINA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As mentioned above, there are many relevant literatures on the production of lubricating oil base oil from Fischer-Tropsch synthetic oil, but the Fischer-Tropsch synthetic wax contains a lot of straight chain hydrocarbons, which is not an ideal raw material source for lubricating oil base oil

Method used

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  • Method for producing diesel oil and chemical materials by f-t synthetic wax
  • Method for producing diesel oil and chemical materials by f-t synthetic wax

Examples

Experimental program
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Effect test

Embodiment 1～4

[0041] Embodiment 1-4 Catalytic Hydrocracking of Fischer-Tropsch Waxes

[0042] The properties of the raw materials used are listed in Table 1. The properties of the hydrocracking catalysts used are shown in Table 2. See Table 3 for hydrocracking operating conditions and product distribution and properties. The recycling of tail oil back to hydrocracking refers to full or partial recycling, and the operation mode of full recycling is adopted in the examples. Before carrying out the hydrocracking reaction, the hydrocracking catalyst is presulfided to change the active metal therein from an oxidized state to a sulfided state. The specific operation is to use hydrogen containing 0.8% (V) of hydrogen sulfide in the reactor to keep the temperature at 200° C. for 5 hours, and at 320° C. for 10 hours. The volume space velocity of hydrogen is 1000h -1 , the pressure is 5MPa.

[0043] Table 1 Raw Oil Properties

[0044] Raw oil

Synthetic Wax 1

Synthetic Wax 2

...

Embodiment 5～8

[0049] Embodiment 5-8 Preparation of Hydrocracking Catalyst and Catalytic Hydrocracking of Fischer-Tropsch Waxes

[0050] Beta zeolite is prepared according to the following method, and the beta zeolite is used to prepare the hydrocracking catalyst of the method of the present invention, and then the prepared catalyst is used to carry out catalytic hydrocracking reaction of Fischer-Tropsch synthetic wax.

[0051] 1. Preparation of modified β zeolite

[0052] (1) Preparation of Modified Beta Zeolite B-1

[0053] With 78g sodium aluminate (laboratory preparation contains Al 2 o 3 19.9m%, containing Na 2O 21.44m%), 435g tetraethylammonium hydroxide aqueous solution (the product of industrial production, concentration 1.4N), 288g of coarse porous silica gel particle (Qingdao ocean chemical plant production, containing SiO 2 95%) and 120g of purified water are mixed evenly, and reacted in a 2-liter stainless steel reactor at 100°C for 20 hours under sufficient continuous st...

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Abstract

The invention discloses a method for producing chemical raw material and diesel oil by Fischer-Tropsch synthetic wax and the method is that the Fischer-Tropsch synthetic wax and hydrogen gas contact with hydrogen cracking catalyst under hydrogen cracking condition and then the reaction products are treated by fractionation; diesel distillate obtained is the clean diesel with a low freezing point, while the naphtha cut obtained is high-quality raw material used for cracking of steam to ethane, and distillation range is higher than the hydrogen cracking of tail oil circulation of the diesel oil, wherein, the hydrogen cracking catalyst is the hydrogen cracking catalyst containing Beta zeolite and the weight content of the Beta zeolite in the catalyst is 0.5 percent to 60 percent; the Beta zeolite has properties that SiO2/Al2O3 molar ratio is 20 to 150 and Na2O less than or equal to 0.2w percent. The method of the invention can prepare the Fischer-Tropsch synthetic wax into the clean diesel oil with a low freezing point and high-quality raw material used for producing ethylene by steam cracking.

Description

technical field [0001] The invention relates to a method for producing diesel oil and chemical raw materials from Fischer-Tropsch synthetic wax, in particular to a method for processing Fischer-Tropsch synthetic wax into clean diesel oil and chemical raw materials by using a novel catalyst to hydrocrack the wax. Background technique [0002] Fossil fuels mainly include coal and petroleum. From a global perspective, the reserves of coal far exceed the reserves of petroleum. Therefore, how to replace petroleum with coal is an important topic in the energy field. The important process for coal to replace petroleum is the liquefaction process of coal and the further processing process of coal liquefaction products. [0003] According to different routes of chemical processing, coal liquefaction can be divided into two categories: direct liquefaction and indirect liquefaction. Coal direct liquefaction is the direct conversion of coal into liquid products. The main processes in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G47/02C10G7/02
Inventor 任杰相宏伟曹立仁孙予罕李永旺
Owner SYNFUELS CHINA TECH CO LTD
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