19108 results about "High activity" patented technology

The spherical catalyst carrier is prepared with alcoholated magnesium chloride containing double-ether compound in emulsifying pelletizer. Liquid titanium halide compound is carried onto the spherical catalyst carrier to form spherical solid catalyst component in the presence of electron donor. In the X-ray diffraction spectrogram, the spherical solid catalyst component has diffraction peak in 13.3 deg of 2theta angle, strongest diffraction peak in 26.5 deg of 2theta angle and no characteristic diffraction peak of alpha-anhydrous MgCl2 in 15 deg of 2theta angle. The catalyst of the presentinvention has very high activity and may be used to produce polymer with good form, high apparent density and less fine powder. The catalyst is used in homopolymerization and copolymerization of olefin and suitable for various polymerization process.

The invention relates to a new catalyst for single active central Ziegler-Natta alkene polymerization. Said catalyst takes salicylal containing dentate or substituted salicylal derivatives as electrons, and is prepared by adding pretreated carrier, metallic compound and electrons into magnesium compound / tetrahydrofuran solution. The catalyst can produce ethane homopolymer and copolymer with narrow molecular weight distribution (1.6-3.8) and even comonomer distribution, with high activity and under action of adjuvant catalyst of alkyl aluminium and alkyl aluminoxanes. The ethane polymerization, homopolymerization or combined polymerization of ethane and 1- olefin, ring olefin and polar monomer through slurry method or gas phase method by using said catalyst can be realized.

A preparation method of a ferment Chinese Traditional Herbs for feeding belongs to the production field of the feed additives. The technical proposal provided by the present invention is that one or various intestinal probiotics is inoculated on a cultivation matrix containing extracts of Chinese Traditional Herbs, and undergoes ferment cultivation in a proper condition. The probiotics include Lactobacillus acidophilus, Bacillus subtilis, and candida utilis, etc, and the selected Chinese Traditional Herbs include astragalus, atractlylis lancea formalyrata, codonopsis pilosula, pericarpium citri reticulatae, and atractylis atractylis ovata, etc. The ferment Chinese Traditional Herbs for feeding provided by the present invention used to breed the livestock and the poultry is capable of preventing and treating epidemic diseases and improving the growth of the animal. The biological ferment of the water extract of Chinese Traditional Herbs by the probiotics is utilized to produce the elements with higher activities, thereby improving the absorption, transportation, metabolism, activation and medical efficacy of the Chinese Traditional Herbs in human body.

A technique to reduce blocking and ringing artifacts in low bit-rate block-based video coding is applied to each reconstructed frame output from the decoder. For each pixel block of a reconstructed frame, its DC value and DC values of the surrounding eight neighbor blocks are exploited to predict AC coefficients which might be lost in the quantization stage in the encoding process. The predicted AC coefficients are used to classify each reconstructed block as either a low-activity or a high-activity block. Low-pass filtering is then adaptively applied according to the classification of the block. Strong low-pass filtering is applied in low-activity blocks where the blocking artifacts are most noticeable, whereas weak low-pass filtering is applied in high-activity blocks where ringing noise as well as blocking artifacts may exist. The adaptive filtering reduces ringing noise as well as blocking artifacts without introducing undesired blur. In low activity blocks, the blocking artifacts are reduced by one dimensional horizontal and vertical low-pass filters which are selectively applied in either the horizontal and / or vertical direction depending on the locations and absolute values of the predicted AC coefficients. In high activity blocks, de-blocking and de-ringing is conducted by a single filter, applied horizontally and / or vertically, which makes the architecture simple.

This invention relates to a method for preparing catalyst for ethylene homopolymerization or copolymerization with other alpha-olefins. The catalyst comprises at least one Mg composite, at least one Ti compound, at least one organic alcohol compound, and at least one Si compound. The general formula of the Si compound is R1xR2ySi (OR3) z, where R1 and R2 are alkyl or halogen; R3 is alkyl; x is 0-2; y is 0-2; z is 0-4; x + y + z = 4. The catalyst has such advantages as high catalytic activity, high hydrogen sensitivity and narrow particle size distribution of polymer. The catalyst is suitable for slurry polymerization of ethylene, and combined polymerization process where catalyst with high activity is needed.

The invention discloses a bulk hydrotreating catalyst and a preparation method thereof. The catalyst comprises three active metal components, namely Mo, W and Ni, and the sum of active metal oxides is 30 to 70 weight percent. In the method, a proper amount of water-soluble nitrogen-containing compound is added in the bulk catalyst gelatinating process, the pore structure of the catalyst is improved, more metal active sites are exposed on the surface of the catalyst, the utilization rate of active metals is improved, the catalyst has obviously high activity compared with the common bulk catalyst under the condition of the same metal content, and the consumption of the active metals for the common bulk catalyst can be reduced and the preparation cost of the catalyst can be reduced under thecondition of the equivalent activity. In addition, the bulk catalyst has increased pore diameter and pore volume, the Ni-W high active center is fully utilized, complicated macromolecules are easier to contact the active center, and the effect is particularly more obvious when the catalyst treats distillates with high macromolecule content.

The invention relates to a method for preparing alcohol by acetic acid gas phase hydrogenation. A reaction system comprises acetic acid, hydrogen and a catalyst; the reaction temperature is 120-300 DEG C; the reaction pressure is 1.0-20.0MPa; the space velocity of acetic acid liquid is 0.5-10.5h<-1>; the molar ratio of H2 to acetic acid is 1-250; the catalyst takes activated carbon as a carrier; and main active components comprise one or two of transitional metals such as W and Mo. The addition agent is one of or more of precious metals such as Pd, Re, Pt, Rh and Ru and the like; and the acetic acid and the hydrogen can be converted into alcohol with high activity and selectivity under the action of the catalyst.

The invention discloses a catalyst for preparing alcohol by acetic ester hydrogenation as well as a preparation method and an application thereof, which is characterized in that the main catalyst of the catalyst is copper or copper oxide or a mixture of the copper and the copper oxide, and the cocatalyst can be also added, wherein the cocatalyst is one or more of oxides of zinc, manganese, chromium, calcium, barium, iron, nickel and magnesium; and the carrier is alumina or silica sol. The catalyst has high activity and high selectivity under the condition of low temperature and low pressure, thus greatly reducing the investment cost of permanent plants, lowering production energy consumption, being extremely beneficial for the industrial production, and having good stability and long service life. The catalyst of the invention is used to cause percent conversion of a reaction of converting the acetic ester into the alcohol is more than or equal to 80% and the selectivity of the alcohol is more than or equal to 95%.

The invention provides a method for converting a less active or slower to initiate system to a higher activity system so that at the end of a polymerization the most active species is present in the system. The invention generally relates to a process for converting a less active or slower to initiate catalyst system to a higher activity catalyst system wherein the process comprises contacting a protected N-heterocyclic carbene with a metathesis catalyst and an olefin in the presence of energy. One of the benefits of the invention is that the amount of catalyst required is less than or lowered in the presence of the protected N-heterocyclic carbene as compared to the amount of catalyst required in the absence of the protected N-heterocyclic carbene. The protected N-heterocyclic carbene can be unsaturated or saturated. In addition, the invention describes novel ruthenium initiators and methods of making the same.

The invention discloses an alpha-nickel diimine compound olefin polymerization catalyst and a preparation method thereof, and a method for preparing branched polyethylene. Structural formulas of the alpha-nickel diimine compound olefin polymerization catalyst are shown as a formula (I) and a formula (II), and the preparation method of the alpha-nickel diimine compound olefin polymerization catalyst is simple and low in cost, and can catalyze ethylene polymerization with high activity at a temperature of more than or equal to 80 DEG C to obtain high molecular weight polyethylene. The polyethylene prepared by catalyzing of the alpha-nickel diimine compound olefin polymerization catalyst has high molecular weight, and can prepare molecular weight which reaches more than 10<2>*kg / mol in the temperature range of between 0 and 80 DEG C.

The present invention provides a hydrocracking catalyst having high activity, high medium oil selectivity, catalyst constitute uses amorphous silica-alumina as a carrier, Y type molecular sieve processed by special modification is an acidity component, the molecular sieve has a high crystallinity and a lower cell parameter, a plenty quadric hole, larger surface, in addition, has a small acid center, even distribution, no strong acid center, 70-80% is moderate intensity acid center, 20-30% is weak acid center, and the molecular sieve also has a strong anti-nitrogen ability and better damaging ability, the hydrocracking catalyst using the molecular sieve has a better hydrocracking activity, and a higher medium oil selectivity, and a strong anti-nitrogen ability at the same time. The invention uses heavy hydrocarbon single stage or single stage serial hydrocracking process generate midbarrel oil product, and has better activity and medium oil selectivity.

The invention provides a thick coating material capable of purifying air and a preparation method thereof, belonging to the building material field. An internal wall coating decorative material comprises 5 to 40 weight portions of a porous absorbing material and 10 to 40 weight portions of a composite photocatalysis material in every 100 weight portion of the paint. In the preparation method, the coating material, is formed by compounding a mineral material with the nanometer photocatalysis material to obtain a high activity purifying material, matching the high activity purifying material with other nanometer materials and the porous absorbing material, and then adding an inorganic filling material, a skeletal material and other addition agents, can remove harmful gases such as formaldehyde and toluol in air and has the environmental protection function. The paint has good effect for removing formaldehyde, is effective continuously, has certain thickness when the coating layer is used, has simple construction, and beautiful and elegant patterns, is well-bedded, is strong in the three-dimension effect and has good decorative effect.

The present invention relates to one kind of high activity catalyst for catalyzing and activating CO2 to react with alkane epoxide to synthesize polycarbonate. The high activity catalyst is tetradentate Schiff base metal complex with double function, i. e., it has both electrophlic center originated from the metal ion in the complex and nucleophilic center originated from the quaternary ammonium salt or quaternary phosphonium salt connected to the benzene ring in the complex. The catalyst can catalyze the reaction of CO2 and alkane epoxide effectively to prepare polycarbonate.

The invention discloses a high-activity and high and medium oil type hydrocracking catalyst and a preparation method thereof. The catalyst comprises hydrogenation active metals and a carrier containing modified Y molecular sieves, amorphous silicon aluminum and alumina, wherein the modified Y molecular sieves have high crystallinity, large silicon aluminum ratio and proper total acid amount and acid distribution, and are obtained by treating Y molecular sieves after hydro-thermal treatment by a mixed aqueous solution of aluminum salts and an acid. The hydrocracking catalyst has high activity and good intermediate distillate oil selectivity and product quality, and is particularly suitable for hydrocracking technology for producing intermediate distillate oil.

A computer-implemented method and system for combining keywords into logical clusters that share a similar behavior with respect to a considered dimension are disclosed. Various embodiments are operable to order a list of keywords from high activity to low activity, partition the list into at least two sets, a head partition including keywords with an activity level above a predefined threshold, a tail partition including the remainder of the keywords in the list, model the keywords in the head partition based on a set of variables, score the keywords in the head partition based on the modeling, and cluster head partition keywords with tail partition keywords having at least one common variable into at least one keyword cluster.

The invention discloses an alpha-nickel diimine compound olefin polymerization catalyst, a preparation method and a method for preparing branched polyethylene. The structural formula of the alpha-nickel diimine compound olefin polymerization catalyst is shown as the formula (I) and the formula (II). The alpha-nickel diimine compound olefin polymerization catalyst has simple preparation method and low cost, and ethylene can be catalyzed to polymerize with high activity at a temperature not lower than 80 DEG C to obtain high molecular weight polyethylene. The polyethylene prepared from the alpha-nickel diimine compound olefin polymerization catalyst by catalyzing has high molecular weight, and the molecular weight can reach higher than 102x kg / mol within the range of 0-80 DEG C.

Pure phase, high activity ZSM-48 crystals having a SiO2 / Al2O3 ratio of less than about 150 / 1, substantially free from ZSM-50 and Kenyaite, and fibrous morphology crystals. The crystals may further have a specific cross morphology. A method for making such crystals using heterostructural, zeolite seeds, other than ZSM-48 and ZSM-50 seeds.

The present invention relates to a lithium-ion battery anode or cathode pole piece and a spreading method of the anode pole piece or the cathode pole piece, wherein, the anode pole piece and the cathode pole piece consists of a foil, a conducting adhesive thin layer and an electrode active material layer in turn; the thickness of the conducting adhesive thin layer is five to ten microns. The electrode pole piece is made in the procedures that a layer of conducting adhesive thin layer in the thickness of five to ten microns are pre-coated on the surface of the foil before the sizing agent is spread, so that a conducting adhesive thin layer having good adhesive force, good conductivity and compact structure is formed on the surface of the foil. Then the electrode active material sizing agent is spread on the conducting adhesive thin layer, and is dried under an appropriate temperature to produce a required pole piece. The present invention can reduce the surface of the foil, and can improve the wetting quality of the sizing agent, thereby improving the adhesion performance of the anode material and the collecting body (aluminum foil) so as to reduce the powder-dropping of the battery during the cycling process, and to prolong the cycling service life of the battery; moreover, the present invention can reduce the content of the adhesive agent in the sizing agent, and improve the utilization rate of the active substance, and the method of the present invention does not produce negative influence on the performance of the battery.

The modified octahedral zeolite is prepared through the once exchange reaction of octahedral zeolite, phosphorus compound and ammonium compound, the further reaction inside exchange slurry with introduced RE solution, filtering, washing and roasting in vapor. The catalyst contains the modified octahedral zeolite 5-45 wt%, clay 15-85 wt% and heat resistant inorganic oxide 15-85 wt%. The catalyst is prepared through mixing the zeolite component, clay and the precursor of the heat resistant inorganic oxide, spraying to form and washing. The catalyst has high activity stability, high gasoline yield, low coke yield, strong heavy oil cracking capacity and high heavy metal pollution resistance.

An acidic amorphous silica-amumina has a large specific surface area and a large pore volume. A carrier complex and a hydrotreating catalyst containing acidic amorphous silica-alumina, in particular a hydrocracking catalyst containing acidic amorphous silica-alumina in combination with a modified zeolite-Y, treats petroleum hydrocarbon materials to produce middle distillates. The amorphous silica-alumina has a SiO2 content of 10-50 wt. %, a specific surface area of 300-600 m2 / g, a pore volume of 0.8-1.5 ml / g and an IR acidity of 0.25-0.60 mmol / g. The catalyst shows a relatively high activity and mid-distillate selectivity and can be particularly used in hydrocracking process for producing mid-distillates with a higher yield.

The invention provides novel organometallic complexes useful as olefin metathesis catalysts. The complexes have an N-heterocyclic carbene ligand and a chelating carbene ligand associated with a Group 8 transition metal center. The molecular structure of the complexes can be altered so as to provide a substantial latency period. The complexes are particularly useful in catalyzing ring closing metathesis of acyclic olefins and ring opening metathesis polymerization of cyclic olefins.

The present invention discloses a natural fruit and vegetable ferment beverage, and a preparation method thereof. The preparation method for the ferment beverage comprises: adding freshly-squeezed fruit and vegetable juice to marine fish skin collagen peptide; adopting the resulting mixture as a fermentation substrate; carrying out dilution, slurry mixing and sterilization, and then adopting a direct vat and freeze-dried type lactic acid starter to carry out fermentation; stopping the fermentation after 7-11 days until the pH value is 4.3; adding a supplementary feed and carrying out sterilization; then adding high-activity dried yeast to carry out fermentation; stopping the fermentation after 5-7 days until the pH value is 4.0; after storing the fermentation broth at the low temperature, carrying out homogenization, concentration, centrifugation, blending, sterilization and bulking to finally prepare the novel natural fruit and vegetable ferment beverage. According to the ferment beverage of the present invention, the stepwise fermentation is adopted for the freshly-squeezed fruit and vegetable juice by using the lactic acid bacteria and the yeast; the marine fish skin collagen peptide is added to promote the growth and the metabolism of fermentation bacteria, such that metabolic products of nutritional ingredients in the natural fruits and vegetables are rich so as to provide a beneficial nutrition and health effect.

The invention discloses a high-activity catalyst which catalyzing and activating carbon dioxide to perform the copolymerization reaction with alkylene oxide to synthesize polycarbonate. The catalyst is characterized in that the catalyst is a tetradentate schiff base complex contains one or two organic base groups and has single active site initiation and controllable polymerization. The catalyst has the advantages that under milder conditions and at lower concentration of the catalyst, the catalyst can highly and efficiently catalyze the carbon dioxide to make the copolymerization reaction with the alkylene oxide to prepare the polycarbonate, the catalytic efficiency is 10<6>g polymer / mol catalyst, the polymer molecular weight is adjusted in the range of between 5,000 and 500,000, the molecular weight distribution is less than 2, the alternating structure is over 97 percent, and the catalyst can be degraded into small molecule compounds under certain condition. By utilizing the catalyst, the telomerization reaction between the carbon dioxide and two or more than two types of alkylene oxide can be catalyzed to synthesize a polycarbonate telomer with adjusting glass transition temperature.

The invention discloses a catalyst for preparing aromatic hydrocarbon through methanol conversion. The catalyst comprises a component A and components B, wherein the mass ratio of component A to components B is 0.25-4; the component A is a modified zeolite molecular sieve and comprises 80-99wt% of molecular sieves and 1-20wt% of molecular sieve modifiers; the components B are oxide loaded metallic elements and halogen and comprise 85-95wt% of oxide, 0.5-10wt% of total metallic elements and 0.1-5wt% of halogen; and the component A and the components B are formed through squashing or extruding after being mixed uniformly. The catalyst has the following characteristics that: (1) the total recovery of benzene, toluene and xylene is higher and selectivity is high; (2) the raw material treatment capacity is large; (3) the non-aromatic hydrocarbon liquid product can serve as the solvent oil or gasoline component; (4) C4 hydrocarbon and non-aromatic hydrocarbon liquid phase products in the gas phase product can circularly enter into the catalyst bed layer, thus not only balancing the reaction heat but also improving the total recovery of the aromatic hydrocarbon; and (5) the catalyst has high activity and long life.

The invention relates to a Y-zeolite containing anti-nitrogen-type hydrocracking catalyst, selecting proper Y-zeolite to assort with special acidic unformed sial, to make the catalyst have higher activity and medium-oil selectivity, able to directly process high-nitrogen content raw material without prerefining segment, and able to meet cracking active requirement of full circulation. It is applied to maximumly producing the clean fuel.

A process for extracting hemopoietic stem cells from the placenta of healthy puerperant to create hemopoistic stem cell bank features that the mechanical, enzyme digestive and monoclonal antibody-magnetic bead method is used to extract blood stem cells from placenta, and concentrate and purify them. Its advantages are high activity and high concentration.

An integral de-nitrating catalyst SCR with dual oxides as carrier for removing NOx from fume is characterized by that the cellular cordierite ceramic is used as skeleton, its composite carrier is composed of Al2O3 as internal layer and TiO2 as external layer, and its active component consists of V2O5 and WO3. Its advantages are high activity, wide active temp window, and high effect and mechanical stability.