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A hydrocracking method for producing chemical raw materials from diesel fractions

A technology of hydrocracking and fractionation, which is applied in the fields of hydrocarbon oil cracking, petroleum industry, hydrotreating process, etc., and can solve the problems of undisclosed production of chemical raw materials, etc.

Active Publication Date: 2020-05-19
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method also does not disclose how to produce chemical raw materials including light naphtha, heavy naphtha and tail oil from the diesel fraction

Method used

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  • A hydrocracking method for producing chemical raw materials from diesel fractions
  • A hydrocracking method for producing chemical raw materials from diesel fractions
  • A hydrocracking method for producing chemical raw materials from diesel fractions

Examples

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preparation example Construction

[0062] Preferably, the preparation method of the hydrated alumina composition containing Y-type molecular sieve comprises: mixing the components in a raw material composition to obtain the hydrated alumina composition, the raw material composition containing hydrated alumina Aluminum wet gels, Y-type molecular sieve molecular sieves and compounds having at least two proton acceptor sites, the i value of said hydrated alumina wet gels is not less than 50%,

[0063] The i value is determined by the following method: 10g of alumina hydrate wet gel is dried in an air atmosphere at 120°C for 240 minutes, and the mass of the dried sample is recorded as w 2 , using formula II to calculate the value of i,

[0064]

[0065] Preferably, the i value of the hydrated alumina wet gel is not higher than 95%, preferably not higher than 90%, more preferably not higher than 85%, further preferably not higher than 82%; the hydration The i value of the alumina wet gel is not less than 55%, pr...

specific Embodiment approach 1

[0096] Embodiment 1: The aforementioned hydrocracking method for producing chemical raw materials from diesel fractions of the present invention is based on figure 1 The process flow shown is carried out, specifically:

[0097] The raw oil 1, circulating hydrogen 14, and supplementary hydrogen 15 are mixed and then heated by the heat exchanger 4 and the heating furnace 16 to carry out a contact reaction with the hydrocracking catalyst in the hydrocracking unit 3, and the contacted reaction effluent enters the high-pressure separator In 5, the hydrogen-rich gas, liquid phase components and acidic water are separated; the hydrogen-rich gas enters the circulating hydrogen desulfurization system 6, and after removing hydrogen sulfide, enters the circulating hydrogen compressor 7 to circulate to obtain the circulating hydrogen 14; The components enter the low-pressure separator 8 to separate low-fraction gas and low-fraction oil, and the low-fraction oil enters the fractionation sy...

specific Embodiment approach 2

[0098] Embodiment 2: The aforementioned hydrocracking method for producing chemical raw materials from diesel fractions of the present invention is based on figure 2 The process flow shown is carried out, figure 2 and figure 1 The difference is that part of the tail oil fraction 12 is recycled back to the hydrocracking unit for reaction, specifically:

[0099] The raw oil 1, circulating hydrogen 14, and supplementary hydrogen 15 are mixed and then heated by the heat exchanger 4 and the heating furnace 16 to carry out a contact reaction with the hydrocracking catalyst in the hydrocracking unit 3, and the contacted reaction effluent enters the high-pressure separator In 5, the hydrogen-rich gas, liquid phase components and acidic water are separated; the hydrogen-rich gas enters the circulating hydrogen desulfurization system 6, and after removing hydrogen sulfide, enters the circulating hydrogen compressor 7 to circulate to obtain the circulating hydrogen 14; The components...

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Abstract

The present invention relates to the field of diesel oil processing, and discloses a hydrocracking method for producing chemical industry raw materials from diesel oil distillates. The hydrocracking method comprises: introducing diesel oil distillates into a hydrocracking reaction zone containing a hydrocracking catalyst, carrying out a hydrocracking reaction, and separating the reaction productsobtained after the hydrocracking reaction to obtain light naphtha, heavy naphtha and a tail oil distillate, wherein the chain alkane content in the diesel oil distillates is 20-50 wt%. According to the present invention, with the hydrocracking method, the chemical industrial raw material can be produced from the diesel oil distillate under the medium-low pressure condition, wherein the heavy naphtha can be used as the high-aromatic-potential-content reforming raw material, and the light naphtha and the tail oil can be used as the high-quality steam cracking raw material.

Description

technical field [0001] The invention relates to the field of diesel processing, in particular to a hydrocracking method for producing chemical raw materials from diesel fractions. Background technique [0002] Hydrocracking light naphtha and tail oil are high-quality raw materials for steam cracking due to their high paraffin content, so that higher yields of ethylene and propylene can be obtained. Due to the high potential content of aromatics, hydrocracked heavy naphtha is a high-quality reforming raw material. The combined technology of continuous reforming and aromatics extraction can produce high-value aromatics raw materials such as benzene, toluene, and xylene (BTX). [0003] In recent years, with the transformation and development of China's economy, the market demand for chemical raw materials such as polyethylene and polypropylene has been increasing; and the continuous development of the polyester industry has also increased the demand for aromatics such as benzen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/14C10G47/16
CPCC10G47/16C10G67/14C10G2300/1037
Inventor 任亮梁家林辛靖胡志海王子文
Owner CHINA PETROLEUM & CHEM CORP
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