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32results about How to "Strong anti-coking performance" patented technology

A kind of hydrorefining method of distillate oil

The invention provides a hydrorefining method of distillate oil. In the hydrorefining method, a cobalt molybdenum nickel hydrogenation catalyst is used; hydrogenation process conditions are as follows: the inlet temperature is 200-320 DEG C, the operation pressure is larger than or equal to 2.4MPa, the volume space velocity of a liquid is 1-5h<-1>, and the volume ratio of hydrogen to oil is 100-500; in the cobalt molybdenum nickel hydrogenation catalyst, silicon-containing alumina is used as a carrier, cobalt, molybdenum and nickel are used as active components, and phosphorus and alkali metal are added to be used as auxiliaries; and the precursor of the silicon-containing alumina carrier is pseudo boehmite containing amorphous silica-alumina and is obtained by the steps of firstly preparing an amorphous silica-alumina slurry and a pseudo boehmite slurry, mixing the two slurries, ageing, and then carrying out posttreatment processes such as filtering, washing and drying. According to the invention, hydrorefining is carried out on a first-stage hydrogenation product of full-fraction cracked gasoline by using the hydrorefining method, wherein the bromine value in the hydrogenation product is less than 1.0*10<-2>g / g and the content of sulfur in the hydrogenation product is less than 1.0mu g / g, thereby meeting the second-stage hydrogenation requirements of the cracked gasoline.
Owner:PETROCHINA CO LTD

Hydrofining catalyst and preparation method thereof

The invention relates to a hydrofining catalyst and a preparation method thereof. The invention is characterized in that: in the catalyst, silicon-containing alumina is taken as a carrier, cobalt, molybdenum and nickel are taken as active ingredients, and phosphorus and alkali metals and / or alkali earth metals are taken aids; the catalyst comprises the following components in percentage by weight: 1-4 percent of nickel oxide, 14-20 percent of molybdenum oxide, 1-6 percent of cobalt oxide, 0-5 percent of phosphorus oxide, 0-4 percent of alkali metal and / or alkali earth metal oxide and 3.1-33.6percent of silicon oxide; the specific surface area of the catalyst is 210-290 m<2> / g; and the pore volume is 0.55-0.78 ml / g. A silicon-containing alumina carrier precursor is pseudoboehmite which contains amorphous silica-alumina, and is obtained by preparing amorphous silica-alumina slurry and pseudoboehmite slurry, mixing the two types of slurry, aging, filtering, drying and the like. The catalyst has high hydrogenation activity and high stability, and is suitable for hydrofining of distillate oil.
Owner:PETROCHINA CO LTD

Catalyst for preparing butadiene through selective hydrogenation of C4 alkyne, preparation method and applications thereof

The invention relates to a catalyst for preparing butadiene through selective hydrogenation of C4 alkyne, a preparation method and applications thereof, wherein the catalyst comprises a ZrO2 / CdO / Bi2O3composite carrier and an active component, and the active component comprises: Pd or an oxide thereof, at least one selected from a VIIB metal or an oxide thereof, and La or an oxide thereof. According to the invention, the catalyst can be applied to selective hydrogenation of C4 alkyne to recover butadiene, and mainly solves the problems of poor stability, short service life, poor alkyne selectivity and overhigh butadiene loss of the catalyst in the prior art.
Owner:WANHUA CHEM GRP CO LTD

Method for increasing butadiene yield

The invention discloses a method for increasing butadiene yield. According to the method, carbon-4 cut fraction rich in alkyne after butadiene extraction is utilized as a raw material; under the existence of a catalyst, an adiabatic reactor is utilized, and selective hydrogenation is performed to obtain 1,3-butadiene; utilized hydrogenation operation conditions are that an inlet temperature of thereactor is 20 to 70 DEG C, reaction pressure is 0.8 to 3.0 MPa, and a liquid space velocity is 10 to 30 h<-1>. The catalyst is a palladium-silver-lead series catalyst which is prepared from a nickel-containing aluminum oxide carrier with a specific crystal form, so that dispersity and a utilization rate of active metal can be greatly improved, and hydrogenation performance of the catalyst is improved. The method disclosed by the invention has very obvious good effects on effectively utilizing carbon-4 cut fraction rich in alkyne after butadiene extraction, reducing resource waste and improving economical benefits.
Owner:PETROCHINA CO LTD

A sSelective hydrogenation method for pyrolysis gasoline

The invention provides a selective hydrogenation method for pyrolysis gasoline. A single-stage adiabatic fixed-bed reactor is adopted, and the reactor is provided with a Pd-Mo-based hydrogenation catalyst. The hydrogenation process conditions are as follows: reaction temperature 30-120 DEG C, reaction pressure 2-6 MPa, airspeed 0.5-4h-1, hydrogen-to-oil volume ratio (100-600):1. One part of the hydrogenation product is used as the inner cycle of a one-stage hydrogenation reaction, and the other part is sent to a second-stage hydrogenation reactor for hydrorefining. The catalyst having a specific crystal form prepared by using a nickel-containing alumina carrier in the invention can greatly improve the dispersion and utilization rate of active metals, and the addition of selected auxiliaryactive components which are added plays a synergistic role to improve the hydrogenation activity and stability of the catalyst.
Owner:PETROCHINA CO LTD

Method of recycling butadiene by alkyne selective hydrogenation

A method of recycling butadiene by alkyne selective hydrogenation, C-4 fraction rich in alkyne after butadiene extraction is taken as material to carry out selective hydrogenation to obtain 1,3-butadiene in an adiabatic reactor under the existence of a catalyst, with the process operation conditions: reaction inlet temperature is 20-60 DEG C, reaction pressure is 0.6-2.5 MPa, space velocity of liquid is 10-25h-1, wherein the catalyst is a palladium-molybdenum catalyst prepared with alumina supporter containing nickel and with specific crystal form that can greatly improve the dispersion and utilization of reactive metal and the hydrogenation performance of the catalyst. The method of recycling butadiene by the alkyne selective hydrogenation has extremely significant good effect on effectively utilization for C-4 fraction rich in alkyne after butadiene extraction, resource waste reduction and economic benefit improvement.
Owner:PETROCHINA CO LTD

Prehydrogenation treatment method for carbon-4 alkylation raw material

The invention relates to a prehydrogenation treatment for a carbon-4 alkylation raw material. According to the prehydrogenation treatment method, a palladium-molybdenum series catalyst and a fixed bedreactor are utilized; hydrogenation process conditions are that a reaction temperature is 30 to 75 DEG C, reaction pressure is 1 to 3MPa, a liquid space velocity is 2 to 10h<-1>, and a molar ratio ofhydrogen to butadiene is 1 to 10; the palladium-molybdenum series catalyst is prepared from an aluminum oxide carrier containing nickel with a specific crystal form, so that the catalyst has appropriate acidity and a higher reactive metal utilization rate, and butadiene hydrogenation activity and selectivity of the catalyst are remarkably improved. By means of the hydrogenation treatment method disclosed by the invention, a carbon-4 alkylation raw material pretreatment device can effectively remove impurity butadiene at a higher feeding space velocity under the situation that monoolefine in ahydrogenation product is fundamentally not lost; thus, very obvious and good effects of improving environmental benefits and economic benefits of a follow-up alkylation device are achieved.
Owner:PETROCHINA CO LTD

Alkyne-containing C4 fraction selective hydrogenation method

The invention relates to an alkyne-containing C4 fraction selective hydrogenation method. According to the method, rich-alkyne C4 fractions after butadiene extraction are used as raw materials; underthe existence of catalysts, an isothermal reactor is used; selective hydrogenation is performed to obtain 1,3-butadiene; the used process operation conditions are as followings: the reaction temperature is 30 to 75 DEG C, the reaction pressure is 1.0 to 3.0 MPa, and the liquid space velocity is 7 to 18h<-1>. The catalyst is a palladium-molybdenum series catalyst which is prepared from nickel-containing alumina carriers and has a specific crystal form; the dispersity and the utilization rate of active metal can be greatly improved; the hydrogenation performance of the catalyst is improved. Whenbeing used, the method has good effects that the rich-alkyne C4 fractions after butadiene extraction are effectively utilized; the resource waste is reduced; the economic benefits are greatly improved.
Owner:PETROCHINA CO LTD

Method of recycling butene by alkyne selective hydrogenation

The invention discloses a method of recycling butene by alkyne selective hydrogenation, wherein the method takes C-4 fraction rich in alkynes after butadiene extraction as raw material to carry out alkynes and akadiene selective hydrogenation to obtain butene an adiabatic reactor under the action of catalyst, with the process operation conditions: reactor inlet temperature is 25-100 DEG C, reaction pressure is 0.6-2.5 MPa, space velocity of liquid to be 15-25h<-1>, wherein the catalyst is palladium-molybdenum-silver selective hydrogenation catalyst prepared with alumina supporter containing nickel and with specific crystal form that can greatly improve the dispersion and utilization of reactive metal and the hydrogenation performance of the catalyst. The method of recycling butene by the alkyne selective hydrogenation has extremely significant good effect on effectively utilization for C-4 fraction with rich alkynes after butadiene extraction, resource waste reduction and economic benefit improvement.
Owner:PETROCHINA CO LTD

Nickel modified HY molecular sieve oxygen carrier with three-dimensional porous structure as well as preparation and application thereof

The invention discloses a nickel modified HY molecular sieve oxygen carrier with a three-dimensional porous structure as well as preparation and application thereof. An HY molecular sieve is used as acarrier, transition metal is introduced to modify the molecular sieve, and the loading amount of the transition metal in the obtained metal modified HY oxygen carrier is 5-25%, thereby enhancing thecatalytic and oxygen-carrying capacities of the three-dimensional porous HY molecular sieve; a pyrolysis liquid phase product can be converted into hydrogen-rich synthesis gas under a certain reactioncondition; and the ratio of H2 to CO in the synthesis gas can be regulated and controlled to be about 0.5-3.0 by adjusting the reaction working condition, so that further Fischer-Tropsch synthesis isfacilitated.
Owner:SOUTH CHINA AGRI UNIV

Selective hydrogenation method for pyrolysis gasoline C8 fraction

The invention provides a method for selective hydrogenation for phenylacetylene removal by using a raw material of pyrolysis gasoline C8 fraction, wherein the C8 fraction is preheated and enters a fixed bed hydrogenation reactor, a lower feeding mode is adopted, and the reactor is filled with a catalyst; hydrogenation process conditions are: inlet temperature is 10-70 DEG C, space velocity is 0.1-6.0h<-1>, pressure is between 0.1 and 2.0 MPa, the volume ratio of hydrogen to fresh oil is (1-100):1, and a hydrogenation product is a raw material for extracting styrene; Pd-Mo series catalysts prepared by using a nickel-containing alumina carrier having a specific crystalline form prepared by the selective hydrogenation method for the pyrolysis gasoline C8 fraction can greatly improve the dispersion and utilization ratio of active metal, and active components are added to play synergistic effects to improve hydrogenation activity and selectivity of the catalyst.
Owner:PETROCHINA CO LTD

Catalyst system used for synthesizing acetic acid and acetic anhydride and application thereof

The present invention discloses a catalyst system used for acetic acid and acetic anhydride synthesis and the application. Halide of rhodium is used for active specie of a catalyst and alkyl halide, alkali metal iodine and organic solvent are used as the catalyst. Caffeine is used as a ligand. The mass proportion of the caffeine and the halide of the rhodium is one till thirty to one. The catalyst system provided by the present invention has the advantage of good compatibility. The hard removing problems of the wall attachment, the falling to the bottom and the coking of the catalyst are not easy to happen in carbonylation reaction equipment. And the present invention has the advantages of high catalytic activity, high selectivity, high thermal stability and strong anti-coking performance. Any complex pretreatment before the catalysis is not needed. The formation of the catalyst system is simple and rapid. The catalyst process is simple and easy to be implemented. And the present invention also has the advantages of high catalytic activity, high stability, good compatibility, low cost, etc.
Owner:YANKUANG LUNAN CHEM FERTILIZER PLANT

Selective hydrogenation method

The invention provides a selective hydrogenation method. According to the selective hydrogenation method, a fixed bed reactor is utilized, a Pd-Ag series hydrogenation catalyst is put into the reactor, and pyrolysis gasoline and hydrogen enter the reactor after being mixed and preheated; the hydrogenation technological conditions are that a reaction temperature is 30 to 120 DEG C, reaction pressure is 2 to 6MPa, a space velocity is 0.5 to 4h<-1>, and a volume ration of hydrogen to oil is (100 to 600) to 1; one part of a hydrogenated product serve as internal circulation of a one-stage hydrogenation reaction, and the other part of the hydrogenated product is sent into a two-stage hydrogenation reactor to be hydrogenated and refined. By means of the catalyst which is prepared from the specific crystal form nickel-containing aluminum oxide carrier prepared by the selective hydrogenation method disclosed by the invention, dispersity and a utilization rate of reactive metal are greatly improved; meanwhile, selected activity assisting ingredients are added to achieve a synergistic effect, and hydrogenation performance and selectivity of the catalyst are improved.
Owner:PETROCHINA CO LTD

Method of producing catalytic reforming raw materials

The invention provides a method of producing catalytic reforming raw materials. According to the method, hydrotreatment is carried out on the raw materials once and for all. Conditions for a hydrotreatment process are as follows: temperature of a reaction inlet is 200 to 320 DEG C; operational pressure is greater than 2.4 MPa; volume space velocity of fresh raw oil is 4 to 12 / h; a volume ratio of hydrogen to oil is 50 to 300. A hydrotreatment catalyst employed in the invention uses silicon-containing alumina as a carrier, nickel and tungsten as active components, and phosphor and alkali metals and / or alkaline earth metals as auxiliary agents. The method provided in the invention can treat high sulfur- and nitrogen-containing catalytic reforming raw materials which contain a great amount of alkene at the condition of low pressure, and provides qualified raw materials in which sulfur content and nitrogen content are both less than 0.5 mu g / g for a catalytic reforming unit.
Owner:PETROCHINA CO LTD

Hydrorefining method of middle and low distillate oil

The invention provides a hydrorefining method of middle and low distillate oil. The hydrorefining method is characterized in that a used catalyst is a molybdenum nickel hydrogenation catalyst; hydrogenation process conditions are as follows: an inlet temperature is 200-300 DEG C, an operation pressure is larger than or equal to 2.4MPa, the volume space speed of a liquid is 1-5 h<-1>, and the volume ratio of hydrogen to oil is 100-500; in the molybdenum nickel catalyst, silicon-containing alumina is a carrier, molybdenum and nickel are active components, and phosphorus and alkali metals are auxiliaries; and the precursor of the silicon-containing alumina carrier is pseudoboehmite containing amorphous silicon and aluminum and is obtained by the steps of firstly preparing an amorphous silicon and aluminum slurry and a pseudoboehmite slurry, mixing the slurries and then ageing, and then carrying out post-treatment processes such as filtering, washing and drying. By using the method, hydrorefining is carried out on a first-section hydrogenation product of cracked gasoline containing middle and low distillates, wherein the bromine value of the hydrogenation product is less than 1.0*10<-2>g / g, and the sulfur content of the hydrogenation product is less than 1.0mu g / g, thereby meeting the second-section hydrogenation requirement of cracked gasoline.
Owner:PETROCHINA CO LTD

Selective hydrogenation method

The invention provides a selective hydrogenation method, which adopts a fixed bed reactor, wherein the reactor is filled with a hydrogenation catalyst which has a bimodal pore distribution structure and at least contains Pd, W, Ni and Cu, pyrolysis gasoline and hydrogen are mixed and preheated and then enter the reactor, and the hydrogenation process conditions are that the reaction temperature is 30-120 DEG C, the reaction pressure is 2-6 MPa, the air speed is 0.5-4 h<-1>, and the volume ratio of hydrogen to oil is (100-600):1. According to the invention, a catalyst carrier used in the hydrogenation method is alumina or mainly alumina and has a bimodal pore distribution structure, active components of the catalyst at least contain Pd, W, Ni and Cu, and the hydrogenation method is characterized in that Ni and Cu are loaded in a microemulsion manner, so that Ni and Cu are mainly distributed in the macropores of the carrier; W is loaded by a solution method, Pd is loaded by a solution method and a microemulsion method, most of Pd is loaded by the solution method, and a small part of Pd is loaded by the microemulsion method; and the hydrogenation method has the characteristics of high hydrogenation activity, good selectivity and strong operation stability.
Owner:PETROCHINA CO LTD

Alkyne-rich C4 fraction selective hydrogenation method

The invention relates to an alkyne-rich C4 fraction selective hydrogenation method, which comprises the following steps: by taking alkyne-rich C4 fraction after butadiene extraction as a raw material, under the action of a catalyst, carrying out selective hydrogenation on alkyne and alkadiene to obtain butene by adopting an adiabatic fixed bed reactor, and under the adopted process operation conditions, the molar ratio of hydrogen at the inlet of the reactor to the sum of the content of total alkyne and alkadiene is 1.5-2.5; the reaction inlet temperature is 30-80 DEG C, the reaction pressure is 1.0-3.0 MPa, and the liquid volume space velocity is 10-25 h <-1 >. The catalyst at least contains four components of Pd, Bi, Ni and Cu, and Ni, Cu and a small amount of Pd are loaded by adopting a microemulsion method and are distributed in macropores of the carrier. Bi and most Pd are loaded by adopting a traditional solution impregnation method and are distributed in small holes of the carrier. By adopting the method disclosed by the invention, the C4 fraction rich in alkyne after butadiene extraction can be effectively utilized, the resource waste is reduced, and meanwhile, the hydrogenation method disclosed by the invention has the characteristics of high anti-coking performance and good operation stability.
Owner:PETROCHINA CO LTD

Pre-hydrotreatment method of reforming feedstocks

The invention provides a pre-hydrotreatment method of reforming feedstocks. The pre-hydrotreatment process undergoes in the conditions that: the reaction inlet is at a temperature of 200-320DEG C, the operation pressure is over 2.4MPa, the volume space velocity of fresh raw oil is 4-12h<-1>, and the volume ratio of hydrogen to oil is 50-300; the hydrotreatment catalyst employed takes silicon-containing alumina as the carrier, cobalt and molybdenum as the active constituents, boron and alkali metal and / or alkaline earth metal as the auxiliary agents, and the precursor of the silicon-containing alumina carrier is amorphous silica-alumina containing pseudo-boehmite, which is obtained by preparation of an amorphous silica-alumina slurry and a pseudo-boehmite slurry first, followed by mixing and ageing of the two slurries, and the post-treatments of filtering, washing and drying. The method of the invention can be used to treat catalytic reforming feedstocks of high sulfur and nitrogen content as well as high olefin content in a low pressure condition, and can provide qualified feedstocks with sulfur and nitrogen content both less than 0.5 microgram / gram for catalytic reforming units.
Owner:PETROCHINA CO LTD

A kind of selective hydrogenation method

The invention provides a selective hydrogenation method, which adopts a fixed-bed reactor. The reactor is equipped with a Pd-Ag series hydrogenation catalyst. The cracked gasoline and hydrogen are mixed and preheated before entering the reactor. The hydrogenation process conditions are: reaction Temperature 30~120℃, reaction pressure 2~6MPa, space speed 0.5~4h ‑1 , the volume ratio of hydrogen to oil is 100~600:1; part of the hydrogenation product is used as an internal cycle of the first-stage hydrogenation reaction, and the other part is sent to the second-stage hydrogenation reactor for hydrogenation and refining. The catalyst prepared by using the nickel-containing alumina carrier with a specific crystal form prepared by the present invention can greatly improve the dispersion and utilization rate of active metals. At the same time, the addition of selected co-active components has a synergistic effect and improves the performance of the catalyst. Hydrogenation performance and selectivity.
Owner:PETROCHINA CO LTD
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