5results about How to "Promote carbonization" patented technology

The application relates to a preparation and application of a molybdenum and indium co-modified cobalt-based catalyst for carbon dioxide hydrogenation synthesis of low-carbon alcohol, belonging to the field of catalysis. Co is used as an active component, In and Mo components are introduced, an alkali metal K additive is introduced, an In and Mo co-modified Co-based oxide precursor is created by adopting a sol-gel method, the precursor is reduced by hydrogen, and is further activated by CO2+H2, so that the In and Mo co-modified Co2C catalyst is obtained; the catalyst is used in a reaction of carbon dioxide hydrogenation for preparing low-carbon alcohol, under the condition that the reaction temperature is 340 DEG C and the reaction pressure is 3 MPa, the carbon dioxide conversion rate is more than 35%, and the low-carbon alcohol selectivity is close to 20%.

This invention discloses a porous carbon-supported copper catalyst, its preparation method, and its application, belonging to the field of catalyst preparation technology. The invention uses three-dimensional interconnected ordered porous carbon (NCP) with a large-pore structure as a support, tetraphenylporphyrin copper(II) and tetraphenylporphyrin as nitrogen and copper sources, and KOH or NaOH as activators. An NCP precursor adsorbed with tetraphenylporphyrin copper(II), tetraphenylporphyrin, and an alkaline component is obtained through a two-step adsorption process. This precursor is then pyrolyzed at 600-900℃ under nitrogen protection, cooled to room temperature, and washed with water to obtain the porous carbon-supported copper catalyst (NCP@NC-Cu). This catalyst retains a three-dimensional interconnected porous structure, with the active component (copper species) mainly distributed within the pores of the NCP support, and possesses a large specific surface area and abundant nitrogen. The catalyst was applied to the N-formylation reaction of amines with CO2 and H2 to prepare formamide compounds, exhibiting excellent catalytic activity, recyclability, and good substrate versatility, showing promising application prospects.

The invention relates to the technical field of fabrics, in particular to an aerogel chemical fiber cotton fabric production process which comprises the following steps: (1) washing and drying a chemical fiber cotton fabric, and then performing normal-pressure dielectric barrier discharge plasma modification treatment to obtain a modified chemical fiber cotton fabric; (2) adding water into the nano silicon dioxide aerogel powder, stirring and performing ultrasonic treatment while adding water to obtain a nano silicon dioxide aerogel aqueous solution, and continuously adding waterborne polyurethane glue and a coupling agent while stirring and performing ultrasonic treatment to obtain nano silicon dioxide aerogel finishing glue; (3) immersing the modified chemical fiber cotton fabric into the nano silicon dioxide aerogel finishing glue, and rolling and drying to obtain the aerogel chemical fiber cotton fabric. A layer of aerogel covering body is formed on the fiber surface of the chemical fiber cotton fabric, so that the chemical fiber cotton fabric with multiple effects of heat preservation, flame retardance and hydrophobicity is obtained.

This invention belongs to the field of fire-resistant composite material preparation technology, and provides a nano-aerogel ceramicized silicone rubber composite material, its preparation method, and fire-resistant cables. A silicon carbide layer is deposited on the surface of nano-silica aerogel using atomic layer deposition technology, enhancing the mechanical stability and high-temperature oxidation resistance of the aerogel. A silane coupling agent is used to chemically modify the aerogel surface, improving its interfacial compatibility. An Al-doped ceramicized precursor is prepared by reacting polynitrosilane with various functional silanes and metal compounds, enabling the material to form a dense ceramic protective layer at high temperatures. A phosphorus-containing silicon polymer is synthesized with DOPO as the core, further enhancing the flame-retardant properties of the material. By introducing the modified aerogel, Al-doped ceramicized precursor, and phosphorus-silicon polymer into phenyl silicone rubber and methylphenyl silicone resin, followed by vulcanization and ceramicization, a nano-aerogel / ceramized silicone rubber composite material is obtained for application in the field of fire-resistant cables.

The invention relates to flame-retardant and high-temperature-resistant polyvinyl chloride and a preparation method thereof, and belongs to the technical field of polyvinyl chloride. The polyvinyl chloride comprises the following components in parts by weight: 100 parts of polyvinyl chloride resin, 12-25 parts of organic silicon-zinc hybrid flame retardant, 2-8 parts of reactive compatibilizer and 5-15 parts of core-shell functional filler. According to the organic silicon-zinc hybrid flame retardant, acrylic acid and aminopropyltrimethoxysilane are subjected to condensation to generate acrylamide silane, then the acrylamide silane is coordinated with zinc acetate to form a crystal structure, and silicon and zinc synergistic flame retardance is achieved; the core-shell functional filler takes zinc hydroxystannate as a core and zinc borate as a shell, and has smoke suppression and catalytic char formation functions; and the reactive compatibilizer is a copolymer containing an epoxy group, so that the interfacial compatibility of the flame retardant and the filler with PVC is improved, the safety performance of the material is improved, and the material is suitable for manufacturing cable sheaths.