38results about How to "Catalytic activity does not decrease" patented technology

The invention relates to a method for preparing TiO2 catalyst on the surface carrier of three-dimension beehive ceramic network, wherein it uses orthogonal method to prepare the titanic acid gel and the titanic acid gel with silver, iron, or lanthanum ion; uses dichroite beehive cermai and beehive ceramic as carrier; using gel-sol method to carry the titanic acid gel on the carrier. The load amount of optical catalyst film on the ceramic carrier is 0.21mg/cm2; the TiO2 diameter is 15-20nm; the thickness of load film is 300-400nm; when using it to purify the formaldehyde, and the initial density is 0.42-0.49mg/m3, the formaldehyde density will be lower than 72.2-74% after seven hours; when using it to disinfect, and the initial virus density is 554-924cfu/m3, the virus number is reduced 67.0-75.9% after 14.5h.

The present invention is one kind of ionic liquid catalyst for produce alkylated oil and its preparation process. The catalyst is ionic liquid modified with sulfur or oxygen containing organic compound, benzene or alkyl derivative of benzene, and is used in preparing alkylated oil. It possesses alkylation selectivity, and the alkylated oil product has high octane number, C8 component accounting for 70-90 %, and the outstanding advantage of trimethylpentane proportion in the C8 component over 90 %. In addition, the catalyst can result in product yield up to 170-180 vol% of olefin feed.

The invention relates to a mesoporous molecular sieve of doped metal and an application thereof. The mesoporous molecular sieve is formed by mixing a template, an alkali source, a silicon source and a metal source at the molar ratio of (0.06-0.24):(0.1-0.3):1:(0.01-0.20), and stirring at 20-40 DEG C for 0.5-24 hours to obtain emulsion; carrying out hydrothermal reaction on the emulsion at 80-180 DEG C for at least 12 hours (or reacting in a microwave reactor at the power of 200-2100w for 1-10h), then successively cooling, filtering, washing to be neutral and drying to obtain solid matters; and roasting the solid matters at 400-800 DEG C for 1-15 hours to obtain the molecular sieve, wherein the molecular sieve has a specific area of (BET)200-1500m2/g, pore volume of 0.5-3.0cm3/g and aperture of 2-15nm. The mesoporous molecular sieve has catalytic activity at 200-550 DEG C and the catalytic activity does not decline after roasting at 700 DEG C for 20 hours. The molecular sieve can be used as a catalyst for reaction during methane preparation by synthesis gas, and has commercial value.

The invention discloses a solid base catalyst for preparing biodiesel. The solid base catalyst is prepared by adopting the method comprising the steps of respectively dissolving ZnCl2, MnCl2 and K2CO3 in deionized water; mixing a mixed solution of ZnCl2 and MnCl2 with a K2CO3 solution to obtain a sediment; and aging the sediment, then filtering, washing and drying, and then calcining to obtain a manganese carbonate/zinc oxide compound solid base catalyst, wherein raw materials comprise 5.7-8.5 parts by weight of ZnCl2, 10-16.5 parts of MnCl2, and 18-22 parts of K2CO3. The solid base catalyst disclosed by the invention is capable of efficiently catalyzing transesterification reaction under the reaction condition of subcritical methanol, wherein the conversion rate is maximally more than 99 percent. Meanwhile, the solid base catalyst has the advantages of heterogeneous catalysis and supercritical reaction, and is easy to separate; glycerinum and biodiesel are easily refined; the transesterification rate is high.

The invention provides an ionic-like liquid and a preparation method and an application thereof in preparation of alkylated oil. An amide compound undergoes a reaction with a first metal compound and more than one second metal compound to obtain the ionic-like liquid. With the ionic-like liquid as a catalyst, isoparaffin and olefin are subjected to an alkylation reaction, the ionic-like liquid is separated, and thus the alkylated oil is prepared. The ionic-like liquid has the advantages of easily obtained synthetic raw materials, simple synthetic method and cheap price, the alkylation reaction with the ionic-like liquid as the catalyst has high selectivity, and the proportion of C8 components and trimethyl pentane and the octane number of the alkylated oil are both greatly improved.

The invention relates to the field of organic synthesis, and discloses a synthesis method for biphenyl compounds. The method comprises the following steps: in the presence of an inorganic base, in a mixed solvent of ethanol and water, adding arylboronic acid, aryl halide and a heterogeneous catalyst ZrO2-Pd(OAc)2; reacting 30-180 min while the temperature is controlled at 60-120 DEG C; after reaction liquid is cooled to room temperature, filtering the reaction liquid, washing, and recovering the catalyst; adding a NaOH aqueous solution into filtrate, and carrying out extraction, drying and concentration on the obtained product so as to obtain a high-purity biphenyl compound. According to the invention, the heterogeneous catalyst ZrO2-Pd(OAc)2 which is high in catalytic activity and reusable is used for the first time, the quick coupling of aryl halide and arylboronic acid is realized by taking green and non-toxic ethanol and water as solvents under mild conditions, and then excessive arylboronic acid is removed by using the NaOH aqueous solution, so that the high-purity biphenyl compound is obtained. The method is good in catalytic effect, simple in operation, and environment-friendly.

The invention discloses a preparation method of a self-cleaning Bi2Ti2O7/TiO2 nanowire array composite film with visible-light response, relating to a preparation method of a nanowire array composite film. The invention aims at solving the problem that the glass cleaning of the modern high buildings needs to be completed manually so that the resources are consumed, relatively high risk exists and the elements of sunshine and rainwater cannot be utilized to maintain the surface cleaning. The preparation method comprises the following steps: 1, preparing a titanium dioxide nanowire array precursor film-loaded glass substrate; and 2, preparing a Bi2Ti2O7/TiO2 nanowire array composite film so as to obtain the self-cleaning Bi2Ti2O7/TiO2 nanowire array composite film with visible-light response. The preparation method is completed under simple hydrothermal conditions, so that the synthesis method is simple and the cost is low. According to the preparation method, the self-cleaning Bi2Ti2O7/TiO2 nanowire array composite film with visible-light response can be obtained.

The invention provides a nucleating agent modifying and preparing method of high-performance polypropylene. The method, under a circumstance of not changing polymerization conditions, can modify a nucleating agent or adopt special feeding ways to shield deactivated components after poisoning of a catalyst, so that active ingredients of the nucleating agent are completely released in reaction nucleating and polymerizing processes to the greatest extent; functional group of the modified nucleating agent is free from adverse effect on activity of a main catalyst and free from reaction with a catalyst promoter and an electron donor, so that catalytic activity is basically not reduced, and the modified polypropylene is excellent in performance and obvious in nucleating action in a kettle; the prepared polypropylene is high in comprehensive performance.

The invention discloses a non-noble metal copper-based catalyst and application thereof in benzylamine oxidative coupling reaction, the non-noble metal copper-based catalyst is obtained by loading a copper complex on a gamma-Al2O3 carrier, the molecular formula of the copper complex is [Cu2 (C17H14NP) 2Cl4], and the molecular formula of the non-noble metal copper-based catalyst is Cu2 (C17H14NP) 2Cl4/gamma-Al2O3, which is simply recorded as Cu2/gamma-Al2O3. The Cu2/gamma-Al2O3 catalyst can catalyze the oxidative coupling reaction of benzylamine under mild conditions, and meanwhile, the catalyst can be recycled for at least five times, the activity is kept unchanged, the substrate universality is relatively good, and the catalyst has very good practicability.

The invention discloses a paraffin hydrofining process. In the process, a fixed bed reactor is adopted and is filled with a hydrogenation desulfurization and denitrification catalyst, the catalyst comprises a carrier and an active component, the carrier is a compound or mixture of MSU-G, SBA-15 and HMS, the active component is a mixture of dimolybdenum nitride MO2N, tungsten nitride W2N, molybdenum carbide Mo2C and tungsten carbide WC, and reaction conditions of the fixed bed reactor are as follows: reaction temperature is 250-300 DEG C, hydrogen partial pressure is 2.8-3.6 MPa, hydrogen-paraffin volume ratio is 150-300, and volume space velocity is 0.6-2.0 h<-1>. By the process, the total sulfur content of paraffin can be controlled to be lower than 5 ppm, and meanwhile, the total nitrogen content in the paraffin is controlled to be within 10 ppm.

The invention discloses a hydrofining process of straight-run naphtha. The process is carried out with a fixed bed reactor filled with a hydrogenation desulfurization and denitrification catalyst that includes a carrier and an active component, wherein the carrier is a composite or a mixture of MSU-G, SBA-15 and HMS; and the active component is a mixture including Mo2N, W2N, Mo2C and WC. Reaction conditions of the fixed bed reactor are described as follows: reaction temperature is 250-300 DEG C, partial pressure of hydrogen is 1.5-2.0 MPa, hydrogen-oil volume ratio is 80-150 and volume space velocity is 9-14/h. The process can control the total sulfur content of the straight-run naphtha to be lower than 0.5 ppm.