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Hydrocracking method for more producing chemical industry light oil from poor heavy raw material

A heavy raw material, hydrocracking technology, applied in the field of hydrocarbon oil cracking, can solve the problem of low yield of chemical light oil, and achieve the effect of high cetane number, excellent quality and low impurity content

Active Publication Date: 2012-05-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method requires that the nitrogen content in the suitable heavy raw material is not more than 1500 μg / g, and the yield of the obtained chemical light oil is low

Method used

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  • Hydrocracking method for more producing chemical industry light oil from poor heavy raw material
  • Hydrocracking method for more producing chemical industry light oil from poor heavy raw material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] This example uses the same raw material oil as in Comparative Example 1. After the raw material oil A is mixed with hydrogen, it is successively contacted with the hydrofinishing catalyst RN-32 and the hydrocracking catalyst RHC-5 to react without intermediate separation, and the effluent after the reaction Cooling and separation, the resulting hydrogen-rich gas is recycled, and the resulting liquid is fractionated to obtain light naphtha fractions, heavy naphtha fractions, diesel fractions and tail oil fractions, the hydrogenation catalyst RN-32 and the hydrocracking catalyst RHC-5 The loading volume ratio is 6:4, the reaction conditions are shown in Table 2, and the yield and main properties of the obtained product are shown in Table 3.

[0041] It can be seen from the data in Table 2 and Table 3 that, compared with Comparative Example 1, under the conditions of 10°C lower hydrofining reaction temperature and 8°C lower hydrocracking reaction temperature, the yield of h...

Embodiment 2

[0043] A mixed oil of VGO and CGO is used as the raw material oil B, and its raw material properties are shown in Table 4. It can be seen from Table 4 that the raw material oil quality is poor, the nitrogen content reaches 2300μg / g, and the dry point exceeds 550°C, which is a kind of raw material that is difficult to process.

[0044] After the raw material oil B is mixed with hydrogen, it is sequentially contacted with the hydrofinishing catalyst RN-32 and the hydrocracking catalyst RHC-5 without intermediate separation. The effluent after the reaction is cooled and separated, and the hydrogen-rich gas obtained is recycled. The obtained liquid Light naphtha fractions, heavy naphtha fractions, diesel fractions and tail oil fractions are obtained by fractional distillation. The upper part of the hydrorefining catalyst is filled with a protective agent, and the bottom of the hydrocracking catalyst is filled with a post-refining catalyst. The protective agent RG -1, the loading v...

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Abstract

A hydrocracking method for increasing the production of chemical light oil from poor-quality heavy raw materials comprises the following steps of: feeding heated raw materials and hydrogen gas into a hydrorefining reactor by adopting a single-stage serial once-through process, reacting in the presence of a preferred hydrorefining catalyst, feeding the reaction effluent into a hydrocracking reactor without separation, reacting in the presence of the preferred hydrocracking catalyst, subjecting the produced reaction effluent to oil-gas separation to obtain a hydrogen-rich gas and a liquid, compressing the hydrogen-rich gas and recycling, and fractionally distilling the liquid to obtain a light naphtha fraction, a heavy naphtha fraction, a diesel oil fraction and a tail oil fraction. The method provided by the invention can be used for processing poor-quality heavy raw materials with high content of nitrogen and sulfur impurities to obtain chemical light oils with more quantity and better quality.

Description

technical field [0001] The invention belongs to a hydrocarbon oil cracking method for obtaining low-boiling fractions in the presence of hydrogen, more specifically, a hydrocracking method for producing more chemical light oil from inferior heavy raw materials. Background technique [0002] "Triene" (ethylene, propylene, butadiene) and "triphenyl" (benzene, toluene, xylene) are the basic raw materials of the petrochemical industry and are used to produce various important organic chemical products. The production of "triene" and "triphenyl" mainly comes from petroleum refining and processing, the former is mainly produced by hydrocarbon steam cracking unit, and the latter is mainly provided by catalytic reforming unit. Generally, raw materials such as naphtha and hydrocracking tail oil used as steam cracking olefins unit and catalytic reforming unit are called chemical light oil. [0003] For a long time, due to the low yield of crude oil and light oil in my country, the in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G47/10
Inventor 董建伟胡志海熊震霖李毅毛以朝蒋东红聂红
Owner CHINA PETROLEUM & CHEM CORP
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