159results about How to "Suitable for acidity" patented technology

A catalyst for the hydroisomerizing reaction of paraffin is composed of the active component (0.05-5.0 Wt%) chosen from Pt, Pd and Ir, and the composite molecular sieve ZSM-22/ZSM-23 (or ZSM-23/ZSM-22). It has high catalytic activity and selectivity.

The composite molecular sieve in ten-element cyclic structure has ten-element cyclic Si-Al structure and ten-element cyclic aluminum silicon phosphate structure. It is prepared through adding ZSM-22, ZSM-23, ZSM-5, EU-1, NU-87 or other ten-element cyclic structure Si-Al molecular sieve into aluminum silicon phosphate sol obtained via mixing Si source, Al source, P source, water and template agent to obtain primary sol; and subsequent hydrothermal crystallization to obtain the compound molecular sieve. The synthesis conditions may be altered based on the requirement to change the two phase ratio and the Si/Al ratio. Normally, the added amount of ten-element cyclic Si-Al molecular sieve is 0.01-0.6 time the total oxide weight in the aluminum silicon phosphate sol. The composite molecular sieve in ten-element cyclic structure may be used in the isometric dewaxing of lubricant oil and the isometric pour point depression of diesel oil and exhibits excellent catalytic performance.

A sol gel formulation and process for making thick coatings. In accordance with the teachings of this invention, sol gel coating layers of up to 300 microns in thickness can be provided in a single deposition.

A hydrotreating catalyst of inferior diesel consists of alumina 20.0í½80.0wt% and molecular sieve 3.0í½60.0w%. The catalyst is prepared by loading at least one Fe, Co and Ni metal of ó° family and MO and W metal of ó÷B family as metal active component and adding one or above oxide or fluorinated compound of titanium, magnesium, zirconium, lanthanum, iron, phosphorus, silicon and boron as active auxiliaries. It can decrease content of sulfur and arenes and increase cetyl value in products. It can be used for cryogenic hydrogenation desulfurization, denitridation and hydrogenation dearomatization.

The invention relates to a method for preparing aluminum hydroxide wafer which is modified by silicon. Wherein, said wafer is baked and converted into silicon-modified gamma-Al203, to obtain following properties, that specific surface area is 400-600m2/g, the hole capacity is 1.0-2.0cm3/g, and the silica mass percentage is 2%-20%. In its preparation, after the neutralization between acid aluminum salt solution and alkali compound solution, it adds organic silicon to age, and composite via general steps. The invention has simple method.

The invention relates to a ZSM-22/ ZSM-23 composite molecular sieve and a method for synthesis it, which contains: mixing ZSM-22 molecular sieve with alumina silica colloid prepared by mixing carbon source, aluminum source, inorganic base, water with template agent, and adjusting the acid-base quality of the solution with inorganic acid to prepare initial colloid, the mole composition of the colloid being: SiO2/ Al2O3= 60-300, R/SiO2= 0.05-3, OH-/ SiO2= 0.05-0.5, M/ SiO2=0.1-0.5, H2O/ SiO2= 10-65, the usage of ZSM-22 molecular sieve being 1-60% of silica dioxide by weight, and the temperature agent being one or more of pyrrolidine, isopropyl amine or isobutylamine. The ZSM-22/ ZSM-23 composite molecular sieve is prepared by hydrothermal crystallization of initial colloid.

The invention discloses a preparation method of a hydrotreatment catalyst, comprising the following steps of: introducing silicon and boron additives in the way that an organic silicon source is added after aluminium hydroxide gel forming and then a boron-containing organic compound solution is added, so as to obtain silicon and boron containing aluminium hydroxide, mixing parts of an active metal component with boron-containing aluminium hydroxide by a kneading method, carrying out three-stage roasting to obtain a catalyst intermediate, loading residual part of the active metal onto the catalyst intermediate by dipping, and drying to obtain the hydrotreatment catalyst. By the adoption of the method provided by the invention, the silicon and boron additives and the active metal component are uniformly distributed on the surface of the catalyst. In addition, the active metal component has different existing forms in the catalyst when introduced in the two modes, loss rate of the catalyst activity is reduced by mutual cooperation, and running period of a device is prolonged. The catalyst has large pore volume, large specific surface area, appropriate pore structure and acidity, and is especially suitable for hydrodenitrogenation process of heavy hydrocarbon.

This invention discloses a hydrocracking method, and this invention is used for producing high aromatic hydrocarbon heavy naphtha and high quality end oil.It includes that heavy distillate oil and poor quality catalytic cracking diesel hydrocracks separately, and the mixture of the cracking products is conducted gas liquid separation. Light naphtha, heavy naphtha, aviation kerosene, diesel oil and end oil will be obtained by distillating the liquid phase. The density of the poor quality catalytic cracking diesel oil is above 0.9g/ml, and the aromatic hydrocarbon is over 60wt% and the value of hexadecane is under 30. It is a adequate utilization of catalytic cracking craft to produce high aromatic hydrocarbon heavy naphtha and high quality end oil with heavy distillate oil and poor quality catalytic cracking diesel, which can be separately used as catalytic reforming material and making ethylene material by steam cracking method. High aromatic hydrocarbon heavy naphtha in this invention will produce a large amount of reforming hydrogen after catalytic reforming treatment, which can be used in the process of hydrocracking to make this preparation more ecnomical and reasonable.

The invention belongs to the technical field of catalysts for hydrodenitrogenation of coal tar. The technical problem to be solved is to provide a hydrodenitrogenation catalyst capable of deeply removing a nitrogen-containing compound from coal tar and provided with high mechanical strength, wear resistance and water resistance, and a preparation method and application thereof. The invention adopts the technical scheme that in the hydrodenitrogenation catalyst capable of removing nitrogen-containing compound from coal tar, active components consist of tungsten trioxide, nickel monoxide and chromium sesquioxide; aids comprise fluorine and phosphorus; and a carrier consists of aluminum oxide, zirconium oxide, a Hbeta molecular sieve, a binder and an extrusion aid. By adopting the hydrodenitrogenation catalyst capable of deeply removing the nitrogen-containing compound from the coal tar, the oil nitrogen content of the hydrogenation product can be reduced to be below 50 micrograms/gram; and the hydrodenitrogenation property is high, so that the oil sulfur content of the hydrogenation product can be reduced to be below 40 micrograms/gram.

The present invention relates to one kind of comprehensively modified HZSM-5 zeolite catalyst and its preparation process and use. The process of preparing the catalyst includes the following steps: mixing HZSM-5 zeolite and adhesive in the weight ratio of 1-4, adding sesbania powder and water solution of HNO3 into the mixture to reach sesbania powder concentration of 1-3 wt% and HNO3 concentration of 2-5 wt%, kneading, extruding, drying and roasting to form catalyst carrier intermediate, hydrothermally modifying and organic acid treating the intermediate to obtain catalyst carrier, supporting active metal components onto the carrier, drying, and roasting to form catalyst product. The comprehensively modified HZSM-5 zeolite catalyst is applied in the hydrogenating modification of catalytically cracked gasoline, and can lower its olefin and sulfur content and improve its anti-knock index.

The invention discloses a hydrotreating catalyst and a preparation method thereof. In the method, a boron aid is introduced by adding stable boron-containing organic compound solution after aluminium hydroxide is gelatinated, so that the boron aid is uniformly distributed in the catalyst and the activity phase transformation promoting effect of the boron acid is enhanced; moreover, the obtained catalyst has a high pore volume, a large specific surface area, an appropriate pore structure and appropriate acidity, enhances the activity and stability of the catalyst and is particularly suitable for the hydro-denitrogenation process of heavy hydrocarbons.

The invention relates to a preparation method of a boron-modified alumina carrier. The method comprises the following steps of: firstly wetting an alumina precursor by the use of a low carbon alcoholic solution, adding a boron-containing solution formed by polyol and boric acid, and preparing the boron modified alumina carrier. By the adoption of the method, local supersaturation adsorption phenomenon caused by directly adding the boron-containing solution into the alumina precursor can be avoided, and the solution will not be over-absorbed into internal pores. Simultaneously, with the increase of the temperature during the kneading process, volatilization of low carbon alcohol and low surface tension help boron to uniformly disperse onto the surface of the alumina carrier. In addition, the method is beneficial to improving specific surface area and pore volume of the carrier. The boron modified alumina carrier provided by the invention is especially applicable to being used as a carrier for a hydrodenitrogenation catalyst.

The invention relates to a non-aluminium zeolite molecular sieve containing a TON/MTT skeleton topology structure and a preparation method of the zeolite molecular sieve. The preparation method comprises the steps of dissolving an inorganic alkaline source by using deionized water, then adding a template agent A, a boron source, an iron source or a gallium source, dissolving completely, then adding a template agent B or a silicon source, and adding an-all silicon ZSM-22 molecular sieve as seed crystal into obtained initial gel and then performing ultrasound; utilizing microwave radiation to heat a mixture subjected to the ultrasound so as to obtain a non-aluminum zeolite molecular sieve with a TON/MTT composite topology structure after crystallization. According to the method, the non-aluminium zeolite molecular sieve replaced with a heteroatom is utilized, the acidity is moderate, and the multilevel acidity distribution is adjustable; by adopting the preparation method provided by the invention, the synthesis time is short, the miscellaneous crystal is less, the particle size is uniform, and the repeatability is good. The composite molecular sieve has a huge potential application value in the aspects such as hydrocracking and isomerization.

The invention provides a fruit rice dumpling and a preparation method thereof. The preparation method of the fruit rice dumpling comprises the following steps: steaming glutinous rice together with an acid liquid until cooked, coating fruit grains with curdlan gum, wrapping cooked glutinous rice and fruit grains with bamboo leaves, and sterilizing the rice dumpling product. The invention also provides the fruit rice dumpling which comprises 50 to 60 parts of cooked glutinous rice, 0.8 to 1.2 parts of coated fruit grains and 0.1 to 0.3 parts of glutinous rice flour. According to the fruit ricedumpling and the preparation method thereof provided by the invention, the color of fruit grains is not changed after the fruit rice dumpling is sterilized, and the fruit grains are full and the fruit juices do not flow out when the fruit rice dumpling is stored at room temperature.

A catalyst for petroleum fractions hydrogenation and its preparation are disclosed. It includes preparing silicon binder, fully mixing pseudooligaaqueous aluminum oxide, fluo-compound and compound containing VIB family metals such as molybdenum or tungsten with silicon binder, kneading, stripping, shaping, drying, and high temperature roasting to form Mo(W)/F-SiO2-Al2O3 as carrier, immersing in an aqueous phosphoric acid solution containing VIIIB family metals such as nickel or cobalt, drying and high temperature roasting to obtain the catalyst of petroleum fractions hydrogenation. Its advantages include simple preparation, easy operation, low cost, good active ingredient dispersing status, large specific area and pore volume.

The invention discloses a hydrocracking method which comprises the following steps that a straight-run diesel oil raw material is in contact with a hydrocracking catalyst to carry out hydrocracking reaction, and an obtained hydrocracking product is separated to obtain heavy naphtha, diesel oil, a jet fuel and hydrogenation tail oil, wherein the used hydrocracking catalyst adopts a modified Y-shaped molecular sieve, amorphous silica-alumina and aluminum oxide as carriers, and the modified Y-shaped molecular sieve is an Y-shaped molecular sieve which is rich in meso pores and is concentrated in effective pore size distribution. The hydrocracking method is particularly suitable for a hydrocracking technology for carrying out hydro-conversion on straight-run diesel oil to produce the jet fuel, and has very high catalytic activity and aviation fuel product yield and the quality of a product is improved.

The invention relates to a preparation method of high-silicon macroporous amorphous silicon aluminum dry glue by using a carbonation method. The preparation method comprises steps of: (1) separately preparing a sodium aluminate solution and a silicon-containing compound material; (2) adding the sodium aluminate solution into a sealed pressure reactor, feeding carbon dioxide under stirring, with the pressure being raised to 0.2-2.0 MPa, the reaction temperature being controlled to be 10-35 DEG C and the reaction pressure during a reaction process being maintained; (3) adding a measured solution of the silicon-containing compound in to the reactor, feeding the carbon dioxide under stirring, with the reaction pressure being controlled at 0.2-2.0 MPa, the reaction temperature being controlled at 10-35 DEG C and the reaction pressure being maintained during the reaction process; and (4) ageing after the neutralization reaction is finished, filtering, washing and drying to obtain an amorphous silicon aluminum dry glue product. Compared with the prior art, the preparation method increases the utilization rate of the carbon dioxide, improves the environment of the neutralization reaction, and facilitates quality improvement of the amorphous silicon aluminum dry glue product.

The invention discloses a method for preparing a catalyst by hydrotreatment. The method comprises the following steps: gelatinizing aluminum hydroxide and adding a stable boron-containing organic compound solution, introducing a boron auxiliary agent to obtain the boron-containing aluminum hydroxide, mixing active metal ingredients with boron-containing aluminum hydroxide by a wet-mixing-kneadingmethod, three-segment roasting to obtain a catalyst intermediate, dipping the residual partial active metal and loading on the catalyst intermediate, drying to obtain the hydrotreatment catalyst. According to the invention, the boron auxiliary agent and the active metal ingredients are uniformly distributed on the surface of the catalyst, active metal ingredients introduced by two modes has different forms in the catalyst, mutual cooperation enables reduction of activity loss rate of the catalyst, and the running period of the apparatus can be prolonged. The catalyst has the characteristics of large pore volume and large specific surface area, and possesses proper pore structure and acidity, is especially suitable for hydrodenitrogenation process of heavy hydrocarbon.

The invention discloses a preparation method of a boron-containing alumina carrier. The method comprises the following steps of: gelling the conventional aluminum hydroxide; adding into a stable boron-containing organic compound solution; aging, filtering, washing and drying to obtain dry boron-containing aluminum hydroxide gel; mixing and molding with an adhesive; and heating and performing gradual programmed heating and baking to obtain the boron-containing alumina carrier. Boron-containing alumina is a high-performance carrier component, which can be used for providing a large pore volume and a large specific surface area, has an appropriate pore structure and acidity, and is particularly suitable for a catalyst material needed by a heavy hydrocarbon catalytic processing process.

The invention discloses a meso-microporous composite molecular sieve, a catalyst as well as preparation methods and application thereof. The molecular sieve is prepared from a raw material of a USY molecular sieve and by adding an alkali source, a template agent and a silicon source to perform crystallization treatment. The catalyst is prepared from a carrier and an active ingredient Pt which is evenly loaded on the carrier, wherein the carrier is the molecular sieve, the particle size distribution of the active ingredient Pt is 1.0 to 5.0nm, and the Pt loading amount is 0.1 to 1.0% of the total mass of the catalyst. The invention further provides preparation methods and application of the molecular sieve and the catalyst. According to the catalyst disclosed by the invention, the meso-microporous composite molecular sieve with a high specific surface area is utilized as the carrier and can effectively disperse the active ingredient; under the premise of a low noble metal content, the catalyst still has higher catalytic activity; the catalyst is especially suitable for selective ring-opening reaction of diesel arene.

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.

The invention relates to a synthetic method of 3-methyl-3-buten-1-ol, a catalyst and a preparation method of the catalyst, and relates to the technical field of catalyst synthesis. The preparation method of the catalyst for synthesis of 3-methyl-3-buten-1-ol includes the steps: baking a phosphorus-silicon-aluminum molecular sieve at the temperature of 300-600 DEG C for 3.5-5 h, carrying out equivalent-volume impregnation in an alkaline phosphate solution, then aging, drying, and baking. The preparation method is simple to operate and prone to industrialized production; the 3-methyl-3-buten-1-ol catalyst prepared by the method has good catalytic effect; when the catalyst is applied in the synthesis of 3-methyl-3-buten-1-ol, the yield of 3-methyl-3-buten-1-ol is effectively improved, the production efficiency is effectively improved and the preparation cost is reduced.