3results about How to "Reduced catalytic efficiency" patented technology

The invention relates to the technical field of biosynthesis, in particular to a preparation method of gamma-aminobutyric acid. The invention provides a method for preparing gamma-aminobutyric acid, according to the method, gamma-aminobutyric acid is catalytically synthesized by using a mutant of glutamate decarboxylase screened by the inventor, the problems of low catalytic efficiency, long conversion time and limited reuse times of enzyme are solved, the immobilized enzyme can be continuously subjected to at least 20 rounds of enzyme catalytic reaction, and the yield of gamma-aminobutyric acid is increased. And moreover, the catalytic efficiency is not obviously reduced, the substrate conversion rate can still be stabilized at 99% or above, and the method is suitable for industrial production.

The application discloses a catalyst for catalytic combustion of chlorine-containing organic matters and a preparation method and application thereof, and belongs to the technical field of environmental protection catalysts. In the application, the composite oxide active component is loaded on a molecular sieve through an impregnation method, and then the noble metal active component is adsorbed on the surface of the composite oxide active component through an electrostatic adsorption method, so that the noble metal is stabilized by using the strong interaction between the noble metal and the oxide, the utilization rate of the noble metal catalyst is improved, the activity and stability of the catalytic combustion of the chlorine-containing organic waste gas are improved, and the industrialization of the treatment of the chlorine-containing volatile organic matters by the catalytic combustion has important significance.

The application relates to the technical field of organic synthesis, in particular to a preparation method of biphenol, wherein under visible light irradiation, biphenyl, a catalyst, acetonitrile and hydrogen peroxide are mixed and reacted, then filtered, the obtained filtrate is distilled, and the product is collected, so that the biphenol is prepared; the catalyst is a rare earth doped transition metal organic framework microsphere, the method has mild reaction conditions, is easy to operate, no toxic waste liquid is generated, and a new idea is provided for the preparation of the biphenol.