1399results about How to "Avoid inactivation" patented technology

A method for preparing aromatic hydrocarbons by methanol-containing raw materials. The methanol-containing raw materials comprise methanol and distilled gasoline. The method comprises that the methanol-containing raw materials and catalysts undergo a reaction under conditions of preparing aromatic hydrocarbons by methanol. The method provided by the invention solves the problems that in the prior arts, heat in a reactor is removed through an intermediate cooler and a multitubular reactor is utilized for heat removal or cold product gas is transmitted back to a raw material inlet to remove heat or a diluting material is added to control reaction heat. The method has the advantages of simple processes, and simple and convenient operation.

The instant invention describes compounds having metalloenzyme modulating activity, and methods of treating diseases, disorders or symptoms thereof mediated by such metalloenzymes.

The instant invention describes compounds having metalloenzyme modulating activity, and methods of treating diseases, disorders or symptoms thereof mediated by such metalloenzymes.

The instant invention describes compounds having metalloenzyme modulating activity, and methods of treating diseases, disorders or symptoms thereof mediated by such metalloenzymes.

The invention discloses a silicon trap for coker naphtha and application thereof. In the silicon trap for the coker naphtha, alumina is taken as a carrier, silica is taken as an aid, W, Mo and Ni are taken as hydrogenation components, the pore volume of the silicon trap for the coker naphtha is 0.5-0.70ml/g, the specific surface area is 250-500m<2>/g, the hydrogenation components are 1 to 20 percent based on oxides, and the acid content is 0.3-0.5mmol/g. The silicon trap for the coker naphtha can effectively remove the silicon impurity contained in the coker naphtha, and protects a coker naphtha hydrofining catalyst against permanent deactivation caused by silicon poisoning.

The invention discloses a method, device and reactor for recovery of sulfur from acidic gas. An inorganic sulfide in the acidic gas is catalyzed and oxidized into sulfur by catalytic oxidation reaction, then the organic sulfur in the acidic gas is hydrogenated and hydrolyzed into an inorganic sulfide through catalytic hydrolysis reaction, finally the residual inorganic sulfur in the reaction gas is oxidized into sulfur through secondary catalytic oxidation reaction, and the tail gas is washed by a methanol lotion and/or water, thus realizing complete recovery of sulfur. The invention also discloses the device and reactor for realizing the method. The method and device provided by the invention are suitable for sulfur recovery of low H2S content acidic gas. An alcohol-containing solution is utilized for washing treatment of desulfurized tail gas according to the low temperature methanol washing process, the content of sulfide in the tail gas is reduced, and the environment is protected. At the same time, the reactor involved in the invention has a simple and reasonable structure, saves land occupation of equipment, and lowers the project investment.

The improved circuit structure for a rechargeable battery has in a charging electric circuit device thereof for the battery with a detective protecting electric circuit and a charging-discharging electric circuit; the detective protecting electric circuit has a protective IC and a protective circuit switch; the charging-discharging electric circuit has a voltage stabilizing IC and a voltage stabilizing circuit switch connecting with the voltage stabilizing IC, the voltage stabilizing IC stabilizes the voltage of the battery at a set value, so that when the voltage of the battery is lower than the set value, the voltage stabilizing circuit switch is turned on. This assures normal activating of a unit such as a digital camera and prevents inactivation of the related devices of the camera (such as a driving motor of a lens of the camera) by activating a protective electric circuit in the circuit structure that can protect from overly charging or discharging.

The invention discloses a fungal alpha-amylase-containing beer complex enzyme and a preparation method thereof, belonging to the field of enzyme preparation processing. The high-activity fungal alpha-amylase and other food grade enzyme preparations, plant extracts, antioxidants, protective agents, activating agents and the like can be scientifically compounded by taking concentrated maltase and concentrated malt juice powder as main raw materials; the prepared beer complex enzyme is complete in proteases, high in enzyme activity, difficult to deactivate, mellow in malt aroma, and capable of providing abundant nitrogen source for malt juice, wherein the activity of fungal alpha-amylase in fermenting liquor during the preparation of fungal alpha-amylase is 17000-21000 U/mL. The complex enzyme can be stored for 12 months under the conditions of 0DEG C and 40DEG C, the single enzyme activity loss in the complex enzyme are respectively 0.50% and 0.72%, the enzyme deactivation caused by environment change, and inappropriate operation methods during packaging, storage, transportation, use and the like can be effectively prevented, especially the enzyme deactivation caused by high temperature can be prevented.

The instant invention describes compounds having metalloenzyme modulating activity, and methods of treating diseases, disorders or symptoms thereof mediated by such metalloenzymes.

The instant invention describes compounds having metalloenzyme modulating activity, and methods of treating diseases, disorders or symptoms thereof mediated by such metalloenzymes.

The invention discloses a non-noble metal mercury-free catalyst for hydrochlorination of acetylene and a preparation method thereof. The catalyst mainly contains copper, chlorine, a carrier and the balance of catalysis-promoting metallic elements, wherein the copper exists in the form of copper chloride, the chlorine exists in the form of an inorganic salt of chlorine, the carrier is activated carbon or nitrided activated carbon which is subjected to acid cleaning, and the catalysis-promoting metallic elements are one of or a mixture of any of alkali metals, alkaline-earth metals and non-noble metals of which the chloride is non-volatile in transition metallic elements. The preparation method comprises the process steps of preparing impregnation motor liquor, adding a catalyst carrier to perform equivalent-volume impregnation, drying the mixture and the like. The non-noble metal mercury-free catalyst prepared by adopting the method is better in activity, high in selectivity, long in service life, low in cost and environment-friendly, and can be used for hydrochlorination of acetylene during the production of vinyl chloride by using a calcium carbide method.

The invention discloses an efficient environmental-friendly black carp extrusion compound feed and a production method thereof. The method is characterized by comprising the following steps: mixing large amounts of other raw materials such as fish meal, extruded-soybean, soybean meal, rapeseed meal, cottonseed meal, wheat and rice bran and then coarsely crushing a mixture; adding spray-dried animal blood cells, larvae powder, monocalcium phosphate, choline chloride and salt for evenly mixing, carrying out superfine crushing; adding vitamin premis, mineral premix, rheum emodin, L-carnitine and allicin for evenly mixing; and carrying out steam tempering, extrusion, granulation, drying, spraying, cooling and the like on the mixed materials to obtain the product. The black carp extrusion compound feed is simple to prepare and has comprehensive and balanced nutrition, the digestibility of the black carp on feed nutrient substances can be improved, the feed coefficient is reduced, and the nitrogen and phosphorus emission is lowered. The feed has good palatability, excellent stability in water, and less feed wastes and water pollution. The feed can increase the immunity, antioxidation and anti-stress capabilities of the black carp, and promotes the growth of the black carp.

The invention discloses a kernel-shell structural nanofiber membrane, a preparation method thereof and an application; the preparation method includes steps of (1), preparation of spinning; dissolving sodium alginate, polyoxyethylene and poloxamer F127 in distilled water, stirring evenly and acquiring shell layer spinning solution; mixing the chitosan nanoparticle solution loaded with active matters with polyving akohol solution evenly, and acquiring the kernel layer spinning solution; (2), coaxial electrostatic spinning: respectively injecting the shell layer spinning fluid and kernel layer spinning fluid in a static spinning device containing a coaxial needle, performing the coaxial electrostatic spinning under room temperature, performing solvent evaporation in the spinning process, and acquiring the kernel-shell structural nanofiber membrane loaded with the nanoparticle. The preparation method is simple in operation and gentle in reaction condition and can well control the slow release of the active matter; moreover, the prepared colon targeting controlled release system has obvious colon targeting property, thereby improving the utilization degree of the active matter. The colon targeting controlled release system can be applied to functional food domain.

The invention discloses a method for preparing phycocyanin from fresh spirulina. The process design is based on convenience, high efficiency and capability of facilitating comprehensive utilization of different components, the fresh spirulina is used as a processing raw material, and the spirulina phycocyanin is prepared through steps of low-temperature wall breakage, ammonium sulfate fractional salting-out, polyethylene glycol 2000/(NH4)2SO4 two-aqueous-phase extraction, ultrafiltration and vacuum freezing drying. With the adoption of the method, the yield of the spirulina phycocyanin is higher, the obtained spirulina phycocyanin is low in polysaccharide content, the purity A620/A280 is about 3.7, the method is applicable to preparation of the phycocyanin from other algae used as raw materials, the biological activity of all components of the spirulina can be well kept during preparation, other obtained separated parts can be further processed, a series of products such as active polysaccharides, chlorophyll, algal protein and the like can be obtained, and the method has the high promotional value and the broad application prospect.

The invention discloses a preparation method and application of a non-enzymatic electrochemical immunosensor based on dopamine biomemetic modification and relates to the fields of nano-science, biological immune technology, electrochemical sensing and the like. An electrode is functionalized by utilizing dopamine biomemetic modification, and platinum, silver, palladium and other metal nanoparticles with enzymatic activity are synthesized in situ by utilizing the reduction characteristic of a poly-dopamine modification layer; an antibody is immobilized on the surface of the electrode by means of the interaction of the metal nanoparticles and poly-dopamine modification layer; electrochemical immunoassay on a tumor marker can be realized based on the electrocatalytic effect of the metal nanoparticles to an H2O2 reduction reaction and the identification effect of the antibody molecule to an antigen. The method is simple in steps, easy to operate and low in cost, has a high electrochemical activity and excellent response performance, can solve the problem of difficult nano-material synthesis in a conventional method and lack of simple and effective method, is applicable to preparation of multiple tumor marker immunosensor electrodes, and has a wide application prospect in scientific research and clinical application.

A catalyst for preparing dichlorophenylamine by hydrogenating dichloronitrobenzene is composed of the activated carbon as carrier and the Pd as active component (0.2-2.0 Wt%) carried by said activated carbon. Its preparing process includes such steps as cyclically immersing activated carbon in diluted nitric acid, water washing until it becomes neutral, immersing in the aqueous solution of PdCl2, filtering, and baking the filtered cake. It has high catalytic performance and long cyclic service life.