7results about How to "The post-processing process is simple" patented technology

The invention belongs to the field of electronic materials, and particularly relates to a synthesis method of a high-purity metal complex precursor. Compared with a synthesis method in the prior art, the synthesis method provided by the invention changes a reaction route, substituted cyclopentadiene is prepared firstly, then the substituted cyclopentadiene reacts with butyl lithium and metal chloride in sequence to obtain a substituted cyclopentadienyl metal trichloride intermediate, and finally the substituted cyclopentadienyl metal trichloride intermediate reacts with lithium dialkylamino to obtain the substituted cyclopentadienyl metal trichloride. The target product substituted cyclopentadienyl tri (dialkylamino) metal complex is obtained, and the prepared product is high in yield and purity. The synthesis method provided by the invention is convenient for large-scale production in factories, improves the productivity, and meets the ever-increasing market demand.

The invention discloses activated carbon with biochemical sludge doped with organic matter and a preparation method thereof.The preparation method comprises the following steps that the biochemical sludge is subjected to dehydration pretreatment and fully mixed with the organic matter, then drying and smashing are conducted, and standby sludge particles are obtained; carbonizing the standby sludge particles at constant temperature, and grinding to obtain carbonized material powder; mixing the carbonized material powder with an activating agent, adding the mixture into deionized water, carrying out water-bath heating reaction, and filtering and drying a product; performing constant-temperature activation under the protection of inert gas to obtain an activated product; and placing the activated product in concentrated acid for ultrasonic treatment, and then washing, drying and crushing to obtain the product. According to the method, the biochemical sludge is prepared into the activated carbon, waste is turned into wealth, resource utilization of the biochemical sludge is achieved, the treatment cost of the biochemical sludge is saved, environmental benefits and economic benefits are achieved, and the obtained activated carbon is stable in structure, developed in pores, large in specific surface area and high in adsorbability.

The invention discloses an L-amino acid ligase and application thereof in catalytic synthesis of L-valine dipeptide and derivatives thereof, the amino acid sequence of the L-amino acid ligase is selected from any one sequence of SEQ ID No: 2-9, the L-amino acid ligase is prepared by firstly constructing a genetic engineering strain of a biological enzyme, and synthesizing a biological enzyme gene segment obtained by whole-gene synthesis into L-valine dipeptide and a derivative of the L-valine dipeptide. Using restriction endonuclease to linearize recombinant plasmids, and then performing activation and fermentation induction culture on the positive clones to prepare the recombinant plasmid. The invention also provides a method for catalytically synthesizing the L-valine dipeptide and the derivative thereof by using the L-amino acid ligase disclosed by the invention, the synthesis route is simple, the raw materials are cheap and easy to obtain, the use amount of the enzyme is less than 0.5%, the cost is low, and the conversion rate can reach more than 80%. The method has the advantages of simple post-treatment process, high product purity, high safety and small environmental pollution, and has extremely high economic value and industrial application prospect.

The application discloses a sodium ion battery positive electrode material and a preparation method thereof. By adding cheap, non-toxic, environment-friendly and easily-degradable water-soluble cellulose as an additive, the growth of a specific crystal direction can be inhibited. The hydrophilic group of the water-soluble cellulose can change the coordination environment of metal ions and reduce the entry of water molecules into the crystal lattice. In addition, by introducing the water-soluble cellulose, high-concentration reactant feeding can be realized, which is beneficial to reducing the consumption of industrial water. Meanwhile, compared with other existing additives, the water-soluble cellulose is environment-friendly, easily-degradable, low in production and separation cost, and free of toxic by-product generation. The prepared open three-face cubic Fe-based Prussian blue analogue material is good in dispersity, high in purity and uniform in morphology, and as a sodium ion battery positive electrode material, has a reversible capacity of 155.40 mAhg ‑1 at 0.1C (1C=170 mAhg ‑1 ) and a first discharge coulombic efficiency of 97.83%.

The application discloses a method for synthesizing isooctanol benzoate by using a composite catalyst, and comprises the following steps: mixing isooctanol, the composite catalyst and benzoic acid, and heating and stirring, then increasing the temperature to 140-210 DEG C, carrying out esterification reaction for 5-7 hours, after the esterification reaction is completed, carrying out decoloration, neutralization, water washing, dehydration and dealcoholization, filtering, and cooling to obtain isooctanol benzoate. The application has the beneficial effects that by using the composite catalyst, the color number of the product can be reduced, the reaction speed can be accelerated, the isooctanol utilization rate can be improved, and the esterification reaction efficiency is improved; the process is simple, the production cycle is short, the product yield is high, the color number is small, energy is saved, the environment is protected, and industrialization is easy to realize.

This invention belongs to the field of polyolefin recycling technology and relates to a method for preparing high-quality carbon nanotubes by catalytic carbonization of polyolefins. In this invention, polyolefins are degraded at high temperature to generate small-molecule hydrocarbons. Subsequently, a Ni-Mo-Al catalyst undergoes a reduction reaction to generate elemental nickel. The elemental nickel catalyzes the degradation products to undergo dehydrogenation, cyclization, and aromatization reactions, followed by carbon deposition on the surface of the elemental nickel, which gradually grows into carbon nanotubes. Furthermore, the Ni-Mo-Al catalyst can reduce the formation of amorphous carbon, thereby increasing the activity of elemental nickel and reducing its ability to dissolve carbon, thus preparing carbon nanotubes with smaller diameters and uniform morphology. This invention has the advantages of inexpensive and readily available carbon sources and a simple preparation method, realizing the upgraded chemical recycling of waste polyolefins and the controllable preparation of carbon nanotubes, effectively solving the problem of reusing urban and industrial waste polyolefins.

This invention discloses a method for synthesizing fluopyram. The method involves reacting diethyl 2-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)malonate with dihalomethane in the presence of a polar aprotic solvent and an inorganic base to obtain diethyl 2-halomethyl-2-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)malonate, followed by condensation with 2-trifluoromethylbenzamide to obtain diethyl 2-(3-chloro-5-(trifluoromethyl)pyridin-2-yl)-2-((2-(trifluoromethane)benzoylamino)methyl)malonate. After adjusting the pH of the reaction system to 4-5, the temperature is increased to induce a decarboxylation reaction, yielding fluopyram. This invention employs a simple one-pot process, which is convenient to operate, has a high yield, and low cost, making it suitable for industrial production.