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Hydrocracking technique

A technology of hydrocracking and process method, which is applied in hydrocarbon oil cracking, petroleum industry and other directions, can solve problems such as the self-heating problem of sulfurized catalysts that cannot be completely solved, shorten the sulfurization time, solve the problem of concentrated heat release, and promote contact Effect

Active Publication Date: 2010-08-18
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1400056A Coat the pre-sulfurized catalyst containing sulfidation agent with oxygen-containing organic matter containing at least 16 carbon atoms, treat it above 175°C for a period of time, and then activate it with hydrogen to reduce the self-heating problem of the catalyst, but it cannot completely solve the sulfidation state The self-heating problem of the catalyst, and the storage, transportation and loading of the catalyst still have certain problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Commercial hydrocracking catalyst 3976 (developed by Fushun Petrochemical Research Institute, produced by Fushun Petrochemical Company Catalyst Factory), the main properties are shown in Table 1.

[0032] The specific pre-sulfurization process is as follows:

[0033] (1) Add 23 grams of thiourea dioxide into 100 ml of clean water, heat to 65° C., and stir for 20 minutes while heating. The obtained thiourea dioxide solution was stirred for 30 minutes, and purified water was added to 150 milliliters. Take 200 grams of oxidized state 3976 catalyst and add it to the prepared rotatable container, spray the above solution, the total amount of the solution is 100 milliliters. Then turn for 20 minutes. The impregnated material was dried in air at 110°C for 6 hours. Thiourea dioxide accounted for 7.7% by weight of the catalyst.

[0034] (2) introducing molten elemental sulfur into the catalyst containing the obtained step (1), where the elemental sulfur is 100% of the theore...

Embodiment 2

[0037] The oxidation state catalyst is the same as Example 1, which is 3976.

[0038] Vulcanization treatment method is the same as embodiment 1, just adds 3 grams of citric acid to the thiourea dioxide solution of gained in step 1. A hydrocracking catalyst EPRES-2 containing a sulfurizing agent was obtained.

Embodiment 3

[0042] The oxidation state catalyst is the same as Example 1, which is 3976.

[0043] The vulcanization treatment method is the same as embodiment 2, except that the thiourea dioxide solution obtained in the step 1 is changed into a thiourea solution, and the thiourea consumption accounts for 10% of the catalyst weight, and the others remain unchanged. A hydrocracking catalyst catalyst EPRES-3 containing a sulfurizing agent was obtained.

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PUM

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Abstract

The present invention relates to hydrocarbon hydrocracking process including the steps of loading catalyst into the reactor, activating, reaction, etc. The hydrocracking catalyst contains thiourea compound in 0.5-20 wt% of the catalyst, simple substance sulfur in the amount of 30-150 % of the theoretical sulfur demand of the catalyst, and organic solvent in 0.1-50 wt% of the catalyst. The hydrocracking catalyst with the common action of thiourea compound, sulfur and organic solvent has high sulfur holding rate in activation, less concentrated heat release, lowered temperature rise in the catalyst bed and raised use performance. It may be applied in various kinds of hydrocarbon hydrocracking process.

Description

technical field [0001] The invention relates to a hydrocracking process, in particular to a hydrocracking process for cracking heavy hydrocarbon raw materials into light products. Background technique [0002] Hydrocracking process refers to a reaction process in which heavy hydrocarbons with heavy molecules are cracked into hydrocarbons with small molecules in the presence of heavy hydrocarbon feedstock hydrocracking catalysts and hydrogen, and hydrogenation is carried out at the same time. The hydrocracking catalyst is a dual-functional catalyst with both cracking activity and hydrogenation activity. The cracking activity is generally provided by catalytic materials with acidic centers, and the hydrogenation activity is generally provided by VIB and VIII metals. Catalytic materials with acidic centers are generally provided by molecular sieves, acidic silica-alumina, acidic clay, etc. Group VIB and Group VIII metals are generally one or more of molybdenum, tungsten, cobal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G47/06
Inventor 高玉兰方向晨王刚曹凤兰李崇慧
Owner CHINA PETROLEUM & CHEM CORP
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