Hydrogenation method for reducing condensation point of diesel

A diesel oil and freezing point technology, which is applied in hydrotreating process, petroleum industry, hydrocarbon oil treatment, etc., can solve the problems of easy poisoning and deactivation of noble metal catalysts, complicated process flow, expensive catalysts, etc., and achieves the improvement of the yield of low freezing point diesel oil , High yield of diesel oil, good pour point depressing effect

Active Publication Date: 2014-05-07
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The technical process is complex, the catalyst used is expensive, the investment is high, and the noble metal catalyst is easily poisoned and deactivated

Method used

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  • Hydrogenation method for reducing condensation point of diesel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Using a straight-run diesel oil A as raw material, the raw material A is firstly contacted with the hydrorefining catalyst RS-2000 in the first reaction zone for hydrorefining, and the effluent from the first reaction zone enters the first separation system and the first fractionation system for cutting Gas, naphtha fraction, low-condensing diesel fraction I and high-condensing-point heavy diesel fraction (distillation range 325-376°C), all high-condensing-point heavy diesel fractions enter the second hydrogenation reaction zone, The hydrogen reaction zone is in contact with the hydrogenation-modifying decondensation catalyst E to carry out the isomerization depreciation reaction; the effluent from the second reaction zone enters the second separation system and the second fractionation system to cut out gas, naphtha fraction and low-point-point diesel fraction II . The low-condensation diesel fraction I and the low-condensation diesel fraction II are mixed to obtain a ...

Embodiment 2

[0068] A catalytic diesel oil B is used as a raw material, and the pour point is depressed according to the method provided by the present invention. The distillation range of heavy diesel oil with high freezing point is 265~379℃. The hydrofinishing catalyst is a non-supported hydrofinishing catalyst F, and the loading volume ratio of the hydrofinishing catalyst and the hydromodifying pour point depressing catalyst E is 60:40. The properties of raw oil are listed in Table 1, and the reaction conditions and product properties are listed in Table 3.

[0069] It can be seen from the data in Table 3 that the freezing point of the diesel product decreased to -26°C, the cold filter point decreased to -16°C, the yield reached 91.4%, the cetane number increased to 51.2, and the sulfur content was greatly reduced.

Embodiment 3

[0071] Using a direct diesel oil C as a raw material, the pour point depressing is carried out according to the method provided by the present invention. The distillation range of heavy diesel oil with high freezing point is 315~371℃. The hydrofinishing catalyst is a non-supported hydrofinishing catalyst F, and the loading volume ratio of the hydrofinishing catalyst and the hydromodifying pour point depressing catalyst E is 70:30. The properties of raw oil are listed in Table 1, and the reaction conditions and product properties are listed in Table 3.

[0072] It can be seen from the data in Table 3 that the freezing point of the diesel product is reduced to -27°C, the cold filter point is reduced to -18°C, the yield reaches 95.1%, the cetane number increases to 53.5, and the sulfur content is greatly reduced.

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Abstract

A hydrogenation method for reducing the condensation point of diesel comprises the following steps: raw oil is in contact with a hydrofining catalyst in a first reaction area for reaction, effluents in the first reaction area are subjected to separation and fractionation to obtain gases, naphtha fractions, low-condensation-point diesel fractions I and high-condensation-point heavy diesel fractions; the obtained high-condensation-point heavy diesel fractions enter a second reaction area, and are in contact with a hydro-upgrading condensation point reducing catalyst to carry out an isocracking condensation point reducing reaction; effluents in the second reaction area are subjected to separation and fractionation to obtain low-condensation-point diesel fractions II; the low-condensation-point diesel fractions and the low-condensation-point diesel fractions II are mixed to obtain low-condensation-point diesel. According to the invention, the process selectivity is improved, so that the low-condensation-point diesel yield is improved remarkably. Through the adoption of the hydrogenation method, No.-10 to No.-50 low-condensation-point diesel can be produced flexibly, the cetane number is increased as compared with that of the raw material, the content of impurities such as sulfur and nitrogen is reduced greatly, and the Europe IV diesel standard and the Europe V diesel standard can be met.

Description

technical field [0001] The invention relates to a process for refining and upgrading hydrocarbons in the presence of hydrogen. More specifically, it is a method for producing low-condensation diesel after hydrogenation of diesel fractions. Background technique [0002] The sustained and healthy development of my country's economy and the improvement of people's living standards have made automobiles enter the homes of ordinary people, and the demand for automotive diesel, especially low-condensation diesel, has increased accordingly. On the other hand, the continuous improvement of environmental awareness and environmental protection requirements has promoted the continuous acceleration of the pace of diesel quality upgrading. At the same time, the world's crude oil prices continued to rise and the benefits of refineries continued to be compressed. Therefore, how to produce clean low-condensation diesel fractions and increase the yield of diesel oil is one of the problems ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/02
Inventor 任亮蒋东红张毓莹胡志海聂红王子文董松涛
Owner CHINA PETROLEUM & CHEM CORP
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