38results about How to "Excellent redox stability" patented technology

The present disclosure relates to polypeptides, including fusions thereof, nucleic acids, vectors, host cells, immunodiagnostic reagents, kits, and immunoassays for use detecting the presence of HCV antibodies. More specifically, the present invention describes specific NS3 antigens that can be used for the detection of anti-HCV antibodies.

The present disclosure relates to polypeptides, including fusions thereof, nucleic acids, vectors, host cells, immunodiagnostic reagents, kits, and immunoassays for use detecting the presence of HCV antibodies. More specifically, the present invention describes specific NS3 antigens that can be used for the detection of anti-HCV antibodies.

The invention provides a catalyst for ammoxidation of alkanes. The catalyst contains silicon dioxide carrier and a composite compound of the following formula in atomic ratio: MoVaNbTe<c>DdOx, wherein D is at least one selected from Sn, Ti, Fe, Bi, Sb and W. The catalyst mainly solves the problems of volatilization loss of Te, complicated preparation process, unstable production environment and poor catalyst stability due to volatilization of active components of the catalyst. In order to solve the problems in the prior art, the technical scheme is as follows: the catalyst contains a Mo-V-Nb-Te group as a major component; and a reducer is added in the preparation process to change the preparation environment, that is, the salts or the oxides of Mo and Te are dissolved firstly, then thesalts or the oxides of V and Nb are added in the resulting solution, the required amount of the reducer is added to adjust the oxidation state, and finally the required amount of the silica sol is added. The catalyst has the advantages of excellent oxidation-reduction stability, low reaction temperature, clean reaction product and high yield, and is applied to the industrial production of unsaturated nitrile via ammoxidation of alkanes.

A ceramic anode structure obtainable by a process comprising the steps of: (a) providing a slurry by dispersing a powder of an electronically conductive phase and by adding a binder to the dispersion, in which said powder is selected from the group consisting of niobium-doped strontium titanate, vanadium-doped strontium titanate, tantalum-doped strontium titanate, and mixtures thereof, (b) sintering the slurry of step (a), (c) providing a precursor solution of ceria, said solution containing a solvent and a surfactant, (d) impregnating the resulting sintered structure of step (b) with the precursor solution of step (c), (e) subjecting the resulting structure of step (d) to calcination, and (f) conducting steps (d)-(e) at least once.

The invention relates to an oxidation reaction catalyst of telluriferous alkane ammonia, which comprises a silicon dioxide carrier and a combination which is calculated according to the atomic ratio and comprises the following general formula: MovaNbbTecDdOx, wherein D is at least one selected form Sn, Ti, Fe, Bi, Sb or W. The oxidation reaction catalyst mainly solves the problems that Te is easyto volatilize, the preparation technology is complex, the preparation environment is unstable, and the active component of the catalyst is easy to volatilize, thereby resulting in bad stability of thecatalyst in the prior art; and the oxidation reaction catalyst better solves the problems through adopting the technical proposal that Mo-V-Nb-Te base is used as the main component, the hydrothermalsynthesis method is adopted, the preparation environment is changed through adding reducing agent and acid during the preparation process, that is, firstly the solution of the corresponding salt or the corresponding oxide compound of Mo and Te is mixed with the solution of the corresponding salt or the corresponding oxide compound of V and Nb, then a specified volume of reducing agent and acid areadded to adjust the pH value, and hydrothermal treatment is performed to the uniformly mixed solution. The catalyst has the advantages that the catalyst has good oxidation reduction stability, the reaction temperature is low, the reaction product is clean, and high yield coefficient can be kept for a long time, and the catalyst can be applied to the industrial production for the preparation of the unsaturated acid nitrile in the alkane ammonia oxidation reaction.

The invention relates to a method for preparing an antimony-containing catalyst used for ammoxidation of alkane, which mainly solves the problem of poor stability of the catalyst due to difficult stable combination between Sb and Mo, complex preparation process, unstable preparation environment and easy volatilization of active ingredients of the catalyst existing in the prior art. In the method,the Mo-V-Nb-Sb base is used as a main ingredient of the catalyst, and a silica carrier and a composition including the MoVaNbbSbcDdOx general formula based on an atomic ratio are contained, wherein Dis one of Sn, Ti, Fe, Bi, Te and W. The preparation environment is changed by dissolving corresponding salts or oxides of Mo and Sb; then respectively adding the solution of the corresponding salts or the oxides of V and Nb into the mixture; adding a proper amount of reducing agent into the mixture; and finally adding silica sol into the mixture. The technical scheme adopting a two-stage calcination mode can better solve the problem. The method can be applied to industrial production of unsaturated nitriles by using ammoxidation of alkane.

The invention relates to a method for preparing a catalyst for alkane ammonia oxidation reaction, which mainly solves the problems that the catalyst is formed nonuniformly, Te is volatile, the preparation technology is complex, the preparation environment is unstable, and active ingredients of the catalyst are volatile so as to cause low stability of the catalyst. A Mo-V-Nb-Te or Sb base is takenas a main component of the catalyst, and the catalyst comprises a silicon dioxide carrier and a composition with a general formula of MoVaNbbCcDdOx in an atomic ratio, wherein C is at least one of Teor Sb, and D is one of Sn, Ti, Fe, Bi, Al or W. A spray drying method is adopted, and the problems are solved by a technical scheme that a reducing agent is added in the preparation process to changethe preparation environment, namely corresponding salt or oxides of Mo, Te or Sb are dissolved, solution of corresponding salt or oxides of V and Nb is respectively added, a needed amount of reducingagent is added to regulate an oxidation state, and a needed amount of silica sol is added for performing spray drying. The method can be applied to industrial production of preparing unsaturated nitriles by alkane ammonia oxidation.

A charge transport material exhibiting excellent thermal stability, film forming capability, charge transport capability and luminescence characteristics; and an organic electroluminescent device of high luminance, high light emitting capability and prolonged operating life. There is provided a charge transport material comprising a compound containing two or more pyridine rings substituted at 2,4,6-positions in its molecule characterized in that the pyridine rings are substantially not conjugated with each other (provided that the pyridine rings may be optionally substituted at the 3,5-positions thereof), and further provided an organic electroluminescent device including the charge transport material.