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Hydrocarbons hydrocracking method

A technology for hydrocracking and process method, which is applied in the field of hydrocracking process for cracking heavy hydrocarbon raw materials into light products, can solve problems such as the self-heating problem of sulfided catalysts that cannot be completely solved, and is suitable for large-scale use. , Improve the technological level, improve the effect of sulfur holding rate

Active Publication Date: 2008-03-26
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

[0035] 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.

[0036] The specific pre-sulfurization process is as follows:

[0037] 1. Dissolve tetramethylthiuram disulfide (TMTD) in benzene, evenly impregnate it on the oxidized state 3976 catalyst, and remove benzene at 100°C for 3 hours to obtain a catalyst loaded with TMTD. The amount of TMTD added is 1 / 2 of the weight of the catalyst 3%.

[0038] 2. Introducing molten elemental sulfur into the above catalyst loaded with TMTD, the amount of elemental sulfur introduced is 105% of the theoretical sulfur requirement of the catalyst. Coked diesel is then introduced in an amount of 40% by weight of the catalyst. Finally, it was treated at 160° C. for 5 hours under normal pressure and in a stagnant air atmosphere to obtain the final hydrocracking catalyst EPRES-1 containing a sulfurizing...

Embodiment 2

[0040] The oxidation state catalyst is the same as Example 1, which is 3976.

[0041] The specific pre-sulfurization process is as follows:

[0042] 1. Dissolve tetramethylthiuram disulfide (TMTD) in benzene, evenly impregnate it on the catalyst in oxidation state 3976, and then evaporate and remove benzene at 110°C. The amount of TMTD added is 5% of the weight of the catalyst to obtain a supported Catalyst for TMTD.

[0043] 2. Dispersing the elemental sulfur in a solvent with a volume ratio of catalytic cracking gasoline and rapeseed oil of 8:1, the amount of solvent is 12% of the catalyst weight, and the amount of elemental sulfur is 90% of the metal-containing theoretical sulfur required by the catalyst. The catalyst loaded with TMTD obtained in step 1 was impregnated in a solvent of elemental sulfur, and finally treated at 120° C. for 2 hours under nitrogen. The final hydrocracking catalyst EPRES-2 containing sulfurizing agent was obtained.

Embodiment 3

[0047] The oxidation state catalyst is the same as Example 1, which is 3976.

[0048] The specific pre-sulfurization process is as follows:

[0049] 1. Dissolve dithiodimethyldiphenylthiuram in acetone and introduce it into the catalyst in an oxidized state. The amount of dithiodimethyldiphenylthiuram is 20% of the catalyst weight, and then at 105°C Under treatment for 3 hours, a catalyst containing dithiodimethyldiphenylthiuram was obtained.

[0050] 2, vacuum distillate oil and peanut oil volume ratio are the miscible solvent of 1: 2, solvent consumption is 0.5% of catalyst weight, then mixes with elemental sulfur solid powder, elemental sulfur consumption is 40% of catalyzer metal-containing theoretical sulfur demand.

[0051] 3. The material obtained in step 2 was treated at 180° C. for 3 hours under normal pressure and in a stagnant air atmosphere to obtain the final hydrocracking catalyst EPRES-3 containing a sulfurizing agent.

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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 thiram matter in 0.5-25 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 thiram matter, 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 hydrocarbon 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, tun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G47/02
Inventor 高玉兰方向晨王刚曹凤兰李崇慧
Owner CHINA PETROLEUM & CHEM CORP
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