CN1228419C - Preparation method of distillate deep hydrogenation desulfur catalyst - Google Patents

Preparation method of distillate deep hydrogenation desulfur catalyst Download PDF

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CN1228419C
CN1228419C CN 03134149 CN03134149A CN1228419C CN 1228419 C CN1228419 C CN 1228419C CN 03134149 CN03134149 CN 03134149 CN 03134149 A CN03134149 A CN 03134149A CN 1228419 C CN1228419 C CN 1228419C
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molecular sieve
preparation
zeolite
catalyst
oil
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CN1513951A (en
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王安杰
任靖
王瑶
陈永英
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Dalian University of Technology
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Dalian University of Technology
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Abstract

The present invention relates to a preparation method of a deep hydrodesulfurization catalyst for distillate oil, which belongs to the technical fields of new materials, petroleum refining and petrochemical industry. The preparation method is used for preparing a deep hydrodesulfurization catalyst for distillate oil, such as gasoline, coal oil, diesel oil, wax oil, etc., used in petroleum refining industry, and the catalyst is prepared by adopting a novel carrier material for loading metallic active constituents. The novel carrier material is a composite carrier composed of a mesoporous molecular sieve and a zeolite molecular sieve. The composite carrier having the characteristics of double-pore distribution and acidity complementation, which is used as the carrier of the hydrodesulfurization catalyst, ensures the high dispersion of the metallic active constituents on the surface of the carrier and the promoting action performed by the metallic active constituents on a hydrodesulfurization reaction, and the high-activity hydrodesulfurization catalyst at low temperatures is obtained. The present invention has the advantage that nearly all dibenzothiophene and derivatives thereof are transformed. The present invention is mainly used for manufacturing a hydrofining catalyst for refined oil and a prerefining hydrodesulfurization catalyst for raw materials in petrochemical industry production.

Description

A kind of preparation method of distillate oil deep Hydrobon catalyst
Technical field the invention belongs to novel material, refining of petroleum and petrochemical technology field.
The background technology hydrofining technology is the gordian technique of production cleaner engines fuel, and as gasoline and diesel oil etc., efficient deep hydrodesulfurizationof catalyzer then is the core of this technology.The history in existing more than 50 year of hydrogenating desulfurization skilled industryization, development of technology always tightly center on the exploitation of highly effective hydrogenation desulfurization catalyst.In fraction oil of petroleum, contain the structure various sulfocompounds different, comprise mercaptan, thioether, sulfide, thiophenes with molecular weight.Wherein, thiophenes is difficult to remove.And, proved that dibenzothiophene and derivative thereof are the most difficult sulfocompounds that removes in the petroleum fractions.Therefore, carry out desulphurization reaction with traditional catalyst after, residual sulfocompound substantially all is dibenzothiophene and derivative thereof.That is to say, realize that deep desulfuration must develop dibenzothiophene and derivative thereof are had highly active catalyzer.
Summary of the invention purpose of the present invention just provides a kind ofly has the preparation method of highly active distillate oil deep Hydrobon catalyst to dibenzothiophene and derivative thereof.
Technical solution step of the present invention is,
A. with the mesoporous molecular sieve and the zeolite molecular sieve uniform mixing of preparation, preparation has the composite molecular screen that diplopore distributes, and by mass percentage, mesoporous molecular sieve is 0~100%, and zeolite molecular sieve is 0~100%,
B. composite molecular screen is added in the closed container, vacuumize, add the mixing solutions that contains metal active constituent then, under agitation condition, flooded 0.5~2 hour, then 80~160 ℃ of dryings 2~20 hours, evaporating water 400~600 ℃ of roastings 2~10 hours in air, makes oxidized catalyst.
Mesoporous molecular sieve is MCM-41, SBA-15/16 etc.
Zeolite molecular sieve is the zeolite molecular sieve with microporous crystal structure.
Zeolite molecular sieve with microporous crystal structure is Y zeolite, ZSM-5 zeolite, mordenite, β zeolite, A type zeolite, X type zeolite etc.
Metal active constituent is Ni-Mo, Co-Mo, Ni-W, Co-W and Pt, Pd, Ru etc. in the mixing solutions.The charge capacity of metal component is 0~35% by mass percentage
Prepared catalyzer is estimated on high pressure fixed-bed reactor.Because oxidized catalyst does not have hydrodesulfurization activity, must carry out prevulcanized before carrying out hydrodesulfurization reaction.Operation steps is as follows:
The oxidized catalyst that fragmentation is good adds the flat-temperature zone of reactor, and the two ends of bed are supported with quartz sand, feeds vulcanizing agent, at 0.2~1 hour temperature of reactor is warming up to 200~600 ℃ from room temperature, vulcanizes under this temperature 1~8 hour.Vulcanizing agent is H 2S and H 2Gas mixture or other vulcanizing agents, as CS 2Deng.
Be cooled to the hydrodesulfurization reaction temperature then.Close vulcanizing agent, feed hydrogen and in reactive system, squeeze into the perhydronaphthalene solution that contains dibenzothiophene with high-pressure metering pump simultaneously, the beginning hydrodesulfurization reaction.Every liquid product of 1 hour row, after 3-5 hour, each component concentrations keeps constant in the liquid product.Gathered a sample every 15 minutes, and form with the gas chromatographic analysis product.Collection is no less than 5 samples and carries out compositional analysis, and the mean value of continuous 3 parallel samples is as the composition of product before and after getting.Because sulfur atom-containing not in the reaction product structure of dibenzothiophene is represented desulfurization degree with the transformation efficiency of dibenzothiophene.With the index of this transformation efficiency as evaluation of catalyst activity.
The invention has the beneficial effects as follows that dibenzothiophene and derivative thereof almost all transform.
The present invention is further illustrated below in conjunction with drawings and Examples for description of drawings.
Fig. 1 is that different ratios composite molecular screen of the present invention is made on the catalyzer of preparing carriers the dibenzothiophene hds conversion with the variation relation figure of temperature of reaction.
Among the figure, transverse axis is represented temperature ℃, and the longitudinal axis is represented the transformation efficiency % of dibenzothiophene.
■ represents Ni-Mo (0.75)/A, zero expression Ni-Mo/A-B (0.75),
represents Ni-Mo (0.75)/A-B (0.9), ▲ expression Ni-Mo (0.75)/A-B (0.25).
A represents the MCM-41 mesoporous molecular sieve, and B represents the y-type zeolite molecular sieve, and x represents the ratio of A and the weight of B among the A-B (x).
Embodiment
Take by weighing MCM-41 mesoporous molecular sieve 2.5 and restrain, take by weighing HY zeolite molecular sieve 7.5 grams, evenly grind and mixing, prepare composite molecular screen with diplopore distribution with mortar.Complex carrier is added one be connected with in the there-necked flask of funnel, vacuumized under the room temperature 30 minutes.Take by weighing 3.78 gram nickelous nitrate (Co (NO 3) 26H 2O) and 3.06 gram ammonium molybdate (NH 4) 6Mo 7O 244H 2O), be dissolved in 25 ml deionized water, be made into dipping solution.Under vacuum condition, the steeping fluid adding is filled in the there-necked flask of carrier.Dipping is 1 hour under agitation condition, quick evaporating water then, and 120 ℃ of dryings 12 hours, roasting 5 hours in air under 450 ℃ then made oxidized catalyst.
Oxidized catalyst is made beaded catalyst through compression molding and fragmentation, takes by weighing broken good catalyzer 0.2 gram, adds the flat-temperature zone of reactor, and the two ends of bed are supported with quartz sand.Feeding contains 10%H 2S and H 2Vulcanizing agent, open process furnace and make beds be warming up to 400 ℃ with the speed of 10 ℃/min, constant temperature 3 hours is lowered the temperature then naturally.When the reaction bed temperature is reduced to 280 ℃, close vulcanizing agent, feed hydrogen is squeezed into dibenzothiophene simultaneously in reactive system with high-pressure metering pump perhydronaphthalene solution, and keep constant temperature, the beginning hydrodesulfurization reaction.Every liquid product of 1 hour row, after 3-5 hour, each component concentrations keeps constant in liquid product.Gathered a sample every 15 minutes, and form with the gas chromatographic analysis product.When 280 ℃ of reactions, the desulfurization degree of dibenzothiophene can reach 99.6%.

Claims (4)

1. the preparation method of a distillate oil deep Hydrobon catalyst is characterized in that,
A. with mesoporous molecular sieve and zeolite molecular sieve uniform mixing, preparation has the composite molecular screen that diplopore distributes, and by mass percentage, mesoporous molecular sieve is 0~100%, and zeolite molecular sieve is 0~100%, and mesoporous molecular sieve is MCM-41, SBA-15 or SBA-16;
B. composite molecular screen is added in the closed container, vacuumize, add the mixing solutions that contains metal active constituent then, under agitation condition, flooded 0.5~2 hour, then 80~160 ℃ of dryings 2~20 hours, evaporating water 400~600 ℃ of roastings 2~10 hours in air, makes oxidized catalyst; Metal active constituent is Ni-Mo, Co-Mo, Ni-W, Co-W, Pt, Pd or Ru in the mixing solutions, and the charge capacity of metal component is 0~35% by mass percentage.
2. the preparation method of a kind of distillate oil deep Hydrobon catalyst according to claim 1 is characterized in that, zeolite molecular sieve is the zeolite molecular sieve with microporous crystal structure.
3. the preparation method of a kind of distillate oil deep Hydrobon catalyst according to claim 1 and 2 is characterized in that, the zeolite molecular sieve with microporous crystal structure is Y zeolite, ZSM-5 zeolite, mordenite, β zeolite, A type zeolite or X type zeolite.
4. the preparation method of a kind of distillate oil deep Hydrobon catalyst according to claim 1 is characterized in that, metal active constituent is Ni-Mo in the mixing solutions, and by mass percentage, Ni is 0~15%, and Mo is 5~35%.
CN 03134149 2003-08-20 2003-08-20 Preparation method of distillate deep hydrogenation desulfur catalyst Expired - Fee Related CN1228419C (en)

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CN1228419C true CN1228419C (en) 2005-11-23

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Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101279284B (en) * 2007-04-04 2011-07-13 中国石油化工股份有限公司 Catalyst for preparing ethylene propylene from catalytic pyrolysis
CN102049289B (en) * 2009-10-27 2012-11-21 中国石油化工股份有限公司 Superdeep hydrodesulfurization catalyst and preparation method thereof
CN104511302B (en) * 2013-09-30 2016-08-24 中国石油化工股份有限公司 A kind of desulphurization catalyst and preparation method thereof and the method for desulfurization of hydrocarbon oil
CN104368376B (en) * 2014-11-17 2016-08-17 哈尔滨工业大学 Porous zeotile supports the preparation method of nickel tungsten deep hydrodesulfurizationof catalyst
CN105457668A (en) * 2015-12-10 2016-04-06 哈尔滨工业大学 Method for preparing hydrodesulfurization catalysts with zeolite serving as carriers
CN108295809B (en) * 2018-02-05 2020-12-11 中国海洋石油集团有限公司 Composite desulfurization adsorbent and preparation method and application thereof
CN108465484B (en) * 2018-03-12 2020-10-09 济南大学 Preparation method of FCC gasoline desulfurization and hydrogenation modified catalyst
CN112708460A (en) * 2019-10-24 2021-04-27 中国石油化工股份有限公司 Process for producing low carbon olefins and low sulfur fuel oil components

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