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Production method of diesel oil

A production method and diesel technology, which are applied in the petroleum industry, hydrocarbon oil treatment, hydrotreating process, etc., can solve the problems of increasing the circulating hydrogen load, large hydrogenation heat release, and difficult temperature control, so as to reduce the load and improve the Octane number, the effect of improving properties

Active Publication Date: 2014-12-10
CHINA PETROLEUM & CHEM CORP +1
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AI Technical Summary

Problems solved by technology

Inferior distillate oil has the characteristics of large hydrogenation heat release, and to make the decondensation catalyst in a dormant state, a large amount of cold hydrogen needs to be injected to reduce the temperature of the depreciation catalyst to the required level, which has the disadvantages of large hydrogen consumption, The problem of increasing the cycle hydrogen load and the temperature is difficult to control

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Further elaboration below in conjunction with examples and comparative examples, but the present invention is not limited to this example. In the present invention, wt% is mass fraction.

[0026] The feedstock A and feedstock C used in Examples and Comparative Examples are high-wax distillates, and the feedstock B is low-quality waxy distillate, and their properties are shown in Table 1. The properties of the hydrofinishing catalysts and hydrodepreciation catalysts used in the test are listed in Table 2, wherein the hydrofinishing catalysts are respectively marked as HT-1, HT-2, and HT-3, and the hydrofinishing catalysts are respectively recorded as HDW-1 , HDW-2.

[0027] The technological process of Examples 1 to 4 in the summer mode is as follows: the mixture of raw oil and hydrogen is first contacted with the hydrotreating catalyst in the first reaction zone, and the effluent is mixed with straight-run gasoline and then enters the second reaction zone, and the reacti...

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PUM

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Abstract

The invention discloses a production method of diesel oil. The method consists of: leaving the reaction effluent from diesel oil raw material hydrofining and straight-run gasoline to enter a second reaction zone to contact a hydrodewaxing catalyst, subjecting the diesel oil raw material to a shape selective cracking reaction, and making the straight-run gasoline to undergo dehydrogenation and isomerization reactions, and separating the product so as to obtain a diesel oil product. The method adjusts the operating temperature of the second reaction zone by adjusting the amount of the straight-run gasoline injected into the second reaction zone so as to achieve flexible switch among different pour point depressing depths, and also can make the straight-run gasoline undergo dehydrogenation and isomerization reactions so as to effectively enhance the octane number of the straight-run gasoline. With the characteristics of simple and convenient operation, flexibility and controllability, the method provided in the invention overcomes the security risk of switch between different processes, and is especially suitable for the summer mode for hydrodewaxing production of low pour point diesel oil. Compared with the existing process switching schemes, the method involved in the invention makes full use of existing reactors, and is free of idle reactors.

Description

technical field [0001] The invention relates to a method for producing diesel oil, in particular to a method for flexibly producing high-quality low-condensation diesel oil of different grades from inferior distillate oil. Background technique [0002] In the current oil refining field, the production of diesel is stimulated by good economic efficiency, especially in recent years, the balance between supply and demand of diesel, crude oil cost and clean fuel legislation will still prompt refiners to produce the largest amount of diesel. In addition, with the improvement of people's awareness of environmental protection and the increasingly stringent environmental regulations, the production and use of clean oil products has become a development trend. [0003] With the rapid development of the world economy, social and economic behavior in winter is becoming more and more active, and the demand for low-point diesel oil in the global market is increasing and has a strong seas...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
Inventor 马蕊英孟祥兰赵亮李永泰高鹏
Owner CHINA PETROLEUM & CHEM CORP
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