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

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.

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.

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.

The invention discloses a nickel-modified HY molecular sieve oxygen carrier with a three-dimensional porous structure and its preparation and application. In the present invention, HY molecular sieve is used as a carrier, and transition metals are introduced to modify the molecular sieve at the same time. The loading capacity of the transition metal in the obtained metal-modified HY oxygen carrier is 5-25%, which improves the catalytic and oxygen-carrying capacity of the three-dimensional porous HY molecular sieve. It can realize the conversion of pyrolysis liquid phase products into hydrogen-rich synthesis gas under certain reaction conditions. By adjusting the reaction conditions, the H in the synthesis gas can be 2 The ratio of / CO is regulated at about 0.5-3.0, which is beneficial to further Fischer-Tropsch synthesis.

A method for selective hydrogenation of alkyne-containing carbon tetrafraction, using butadiene-rich alkyne-rich carbon tetrafraction as a raw material, in the presence of a catalyst, using an isothermal reactor, selective hydrogenation to obtain 1,3- For butadiene, the operating conditions of the process are as follows: the reaction temperature is 30-75°C, the reaction pressure is 1.0-3.0MPa, and the liquid space velocity is 7-18h ‑1 . The catalyst is a palladium-molybdenum catalyst prepared on a nickel-containing alumina carrier with a specific crystal form, which can greatly improve the dispersion and utilization of active metals, and improve the hydrogenation performance of the catalyst. Adopting the method of the invention has very obvious good effects on the effective utilization of the C4 fraction rich in alkynes after the extraction of butadiene, reduction of waste of resources and improvement of economic benefits.

A method for recovering butadiene by selective hydrogenation of alkynes, using the C4 fraction rich in alkynes after extraction of butadiene as a raw material, in the presence of a catalyst, using an adiabatic reactor, selective hydrogenation to obtain 1,3 ‑Butadiene, the operating conditions of the process are as follows: the reaction inlet temperature is 20-60°C, the reaction pressure is 0.6-2.5MPa, and the liquid space velocity is 10-25h ‑1 . The catalyst is a palladium-molybdenum catalyst prepared on a nickel-containing alumina carrier with a specific crystal form, which can greatly improve the dispersion and utilization of active metals, and improve the hydrogenation performance of the catalyst. Adopting the method of the invention has very obvious good effects on the effective utilization of the C4 fraction rich in alkynes after the extraction of butadiene, the reduction of waste of resources and the improvement of economic benefits.

The invention relates to a catalyst for preparing butadiene by selective hydrogenation of carbon tetrayne and a preparation method and application. The catalyst includes ZrO 2 / CdO / Bi 2 O 3 A composite carrier and an active component, the active component consists of: at least one of Pd or its oxide, VIIB metal or its oxide, La or its oxide. The catalyst of the invention can be used in the application of the selective hydrogenation of carbon tetraacetylene to recover butadiene, and mainly solves the problems of poor catalyst stability, short life, poor alkyne selectivity and excessive butadiene loss in the prior art.

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.

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.

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.

A method for the selective hydrogenation of alkynes to recover butenes, using the C4 fraction rich in alkynes after the extraction of butadiene as a raw material, in the presence of a catalyst, using an adiabatic reactor to selectively hydrogenate alkynes and dienes The hydrogen is butene, and the operating conditions of the process are as follows: the reactor inlet temperature is 25-100°C, the reaction pressure is 0.6-2.5MPa, and the liquid space velocity is 15-25h ‑1 . The catalyst is a palladium-molybdenum-silver selective hydrogenation catalyst prepared on a nickel-containing alumina carrier with a specific crystal form, which can greatly improve the dispersion and utilization of active metals and improve the hydrogenation performance of the catalyst. Adopting the method of the invention has very obvious good effects on the effective utilization of the C4 fraction rich in alkynes after the extraction of butadiene, reduction of waste of resources and improvement of economic benefits.

A method for increasing the production of butadiene, using the alkyne-rich C4 fraction after the extraction of butadiene as a raw material, in the presence of a catalyst, using an adiabatic reactor, selective hydrogenation to obtain 1,3-butadiene, The operating conditions for hydrogenation are as follows: the reactor inlet temperature is 20-70°C, the reaction pressure is 0.8-3.0MPa, and the liquid space velocity is 10-30h ‑1 . The catalyst is a palladium-silver-lead catalyst prepared on a nickel-containing alumina carrier with a specific crystal form, which can greatly improve the dispersion and utilization of active metals and improve the hydrogenation performance of the catalyst. Adopting the method of the invention has very obvious good effects on the effective utilization of the C4 fraction rich in alkynes after the extraction of butadiene, the reduction of waste of resources and the improvement of economic benefits.

The invention provides a selective hydrogenation method for pyrolysis gasoline, wherein an isothermal fixed bed reactor is adopted, the reactor is provided with a Pd-Mo series hydrogenation catalyst,and the hydrogenation process conditions are: reaction temperature is 50-100 DEG C, reaction pressure is 3-7 MPa, sapce velocity is 1-5h<-1>, and the volume ratio of hydrogen to oil is (100-600):1; ahydrogenation product is sent to the second-stage hydrogenation reactor for hydrorefining; Pd-Mo series hydrogenation catalysts prepared by using a nickel-containing alumina carrier having a specificcrystalline form prepared by the selective hydrogenation method for the pyrolysis gasoline can greatly improve the dispersion and utilization ratio of active metal, and active components are added toplay synergistic effects to improve hydrogenation activity and stability of the catalysts.

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.

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.

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.

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.

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.