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Method for preprocessing raw materials of hydrogenation process

A pretreatment and process technology, applied in the field of pretreatment of hydrogenation process raw materials, can solve the problems of increased filter area, loss of function, excessive water content, etc., and achieves the effect of low energy consumption and continuous operation

Active Publication Date: 2011-01-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the problem of excessive water content (generally required to be less than 300μg / g) is difficult to solve
For materials such as coking gasoline and diesel oil, although an oil-water separator can be installed to remove water in oil after automatic backflushing of the filter with a precision of 25 μm, some mechanical impurities of 5 to 40 μm in the material will block the oil-water separation in a short period of time. Coalescing cores in the reactor, making it non-functional for long-term industrial operation
Of course, the filtration accuracy of the automatic backflush filter can be improved to less than 5 μm to ensure the operation cycle of the oil-water separator, but this will increase the automatic backflush filter equipment and filter area, increase the filter backflush frequency and material loss

Method used

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  • Method for preprocessing raw materials of hydrogenation process
  • Method for preprocessing raw materials of hydrogenation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The raw material for the hydrogenation process containing mechanical impurities and water is coker diesel fraction, which comes from the fractionation tower outlet of the coking unit, with a flow rate of 40 tons / hour, a temperature of 40°C, and a pressure of 0.20 MPa(G). The properties of raw materials are shown in Table 1. According to the method provided by the present invention, the raw material is dehydrated, and the inert gas used is nitrogen. The corresponding operating conditions and the water content of the treated material are shown in Table 2.

[0028] It can be seen from Table 2 that, by adopting the method provided by the present invention, the water content in the treated material is only 210 μg / g, which meets the requirements for the feed of the hydrogenation process unit.

Embodiment 2

[0030]The raw material for the hydrogenation process containing mechanical impurities and water is coal tar fraction, which comes from the outlet of the coal tar crude fractionation tower, with a flow rate of 40 tons / hour, a temperature of 40°C, and a pressure of 0.20 MPa(G). The properties of raw materials are shown in Table 1. According to the method provided by the present invention, the raw material is dehydrated, and the inert gas used is nitrogen. The corresponding operating conditions and the water content of the treated material are shown in Table 3.

[0031] It can be seen from Table 3 that, by adopting the method provided by the present invention, the water content in the treated material is only 285 μg / g, which meets the requirements for feeding the hydrogenation process unit.

[0032] Table 1

[0033] raw material name

coker diesel fraction

Coal tar fraction

Density (20℃), g / cm 3

0.8480

1.002

Distillation range, (2%~98%)℃...

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Abstract

The invention relates to a method for preprocessing raw materials of a hydrogenation process. The raw materials of the hydrogenation process and inert gases are mixed to remove water in oil by utilizing the proportional difference of moisture pressure in the inert gases under different pressures, and the inert gases can be recycled. By adopting the method provided by the invention, the water in oil containing mechanical impurities can be effectively removed, especially the water in coal tar fraction with high water emulsifiablility and solubility can be continuously removed to ensure that the water content is less than 300 mu g / g and meets the requirement for feeding of the hydrogenation process. The method has the advantages of capability of long-period and continuous operation, low energy consumption and better environment protection.

Description

technical field [0001] The present invention relates to a method for pretreatment of raw materials in hydrogenation process, more specifically to a method for removing water and mechanical impurities contained in distillate oil and / or coal tar fraction containing mechanical impurities and moisture. Background technique [0002] Some intermediate materials in petroleum processing plants, such as coked gasoline fractions, coked diesel fractions, and catalytic diesel fractions, need to go through a subsequent hydrogenation process to obtain products or product blending components that meet certain specifications; a coal coking plant with a dry point less than The 450°C coal tar fraction also needs to be hydrotreated or upgraded to obtain products that meet certain specifications or blend components of products or raw materials for subsequent processing devices. Industrial practice shows that this part of the intermediate material contains more mechanical impurities and moisture...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G33/06C10G31/00C10C1/02C10G45/00C10G47/00
Inventor 施昌智袁方
Owner CHINA PETROLEUM & CHEM CORP
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