39results about How to "No catalyst required" patented technology

The invention discloses a method for preparing acetylene by cracking waste grease with thermal plasma. The method comprises the following steps of: introducing a working gas to a plasma generator, and forming thermal plasma jet after arcing; and filtering and atomizing the waste grease, mixing the waste grease with a delivered gas, introducing the mixture to the thermal plasma jet in the plasma generator, performing millisecond cracking reaction, and quenching with a cooling medium to obtain cracked gas containing acetylene. The working gas is one or more of hydrogen, argon and nitrogen; the delivered gas is one or more of hydrogen, argon and nitrogen, and can be the same as or different from the working gas; and the cooling medium is one or more of water, hydrogen and waste grease serving as raw materials. According to the method, the waste grease is used as a raw material, so that high value-added utilization of the waste grease is realized, and environmental pollution is reduced; and the method is short in process flow, environment-friendly, economic, efficient, high in utilization rate of the raw materials and high in yield of the acetylene product.

The invention relates to a high-pressure oxidation synthesis process and equipment for trishydroxymethylphosphine oxide (THPO). The production process includes the following steps: adding organic solvent and paraformaldehyde into the high-pressure reaction kettle, feeding nitrogen protection, stirring to raise the temperature to 60~100°C, feeding PH3 gas to pressurize, and maintaining the pressure inside the kettle at 3.0~5.0MPa, After reacting for 1~3h, lower to normal pressure and normal temperature; transfer all the materials to an oxidation kettle, add an oxidant, heat up to 30~120°C, stir and react for 3~6h, then drop to room temperature; filter the materials through a filter, and transfer the filtrate to Desolventizing kettle, vacuum distillation, the desolventizing temperature is 55~85℃, when the moisture content of the material is less than 2%, the material is transferred to the finished product tank. The invention has the advantages of simple process route, few procedures and low operation intensity; no catalyst and low production cost; comprehensively utilizes the by-product PH3 in the production of sodium hypophosphite; has no pollution to the environment and is environmentally friendly.

The invention discloses a preparation method of a tubular sandwich-structure CNT@Ni@Ni2(CO3)(OH)2 composite material. The preparation method comprises the steps of uniformly dispersing nickel chloride hexahydrate and functionalized multi-wall carbon nanotube in ethylene glycol, adding a reducing agent hydrazine for high-temperature back flow, centrifugally collecting a product, repeatedly washing the product, and performing vacuum drying to obtain core-shell structure CNT@Ni; and dissolving the core-shell structure CNT@Ni and the nickel chloride hexahydrate in deionized water, placing the core-shell structure CNT@Ni and the nickel chloride hexahydrate in a semi-permeable membrane, dissolving sodium carbonate in the deionized water, placing the sodium carbonate outside the semi-permeable membrane, centrifugally collecting a product after standing for a night, repeatedly washing the product, and performing vacuum drying to obtain the tubular sandwich-structure CNT@Ni@Ni2(CO3)(OH)2 composite material. On the basis of combining an oxygen-containing metal compound and a carbon material, a metal nickel monomer is added, thus, the conductivity of the whole material can be improved, meanwhile, the specific capacity of the composite material is also greatly improved, and the cycle lifetime of the composite material is also greatly prolonged. The composite material has the advantages of process simplicity, preparation condition universality, product morphology stability and high purity, the product is convenient and simple to process and is suitable for medium-scale industrial production.

The invention belongs to the technical field of preparation of selenium-containing polymers, and discloses a method for preparing polyselenourea / polyselenoamide through multi-component polymerizationof elemental selenium, isonitrile / alkyne and amine. The method comprises: carrying out a reaction on elemental selenium, a binary triple bond compound and a diamine in an organic solvent under an inert atmosphere, and subsequently treating to obtain a selenium-containing polymer, wherein the binary triple bond compound is binary isonitrile or binary alkyne, and the selenium-containing polymer is polyselenourea or polyselenoamide. According to the present invention, the method has characteristics of mild reaction conditions, high efficiency, energy saving, no catalyst, no by-product generation,atomic economy, green chemistry, low monomer toxicity, high atom utilization rate and high yield (more than or equal to 90%); the group has strong tolerance, and a variety of functional groups can beintroduced into the monomer; and the polyselenourea / polyselenoamide is stable, and can be degraded under specific conditions.

The invention provides a fully bio-based unsaturated polyester prepolymer for dynamic vulcanization with polylactic acid and a preparation method thereof. Then, the preliminary esterification product is subjected to polycondensation reaction under vacuum conditions to obtain a first prepolymer; the first prepolymer is freeze-dried to prepare a fully bio-based unsaturated polyester prepolymer. The invention adopts polybasic acid and diol as biomass raw materials, and the price is low; a one-pot method is adopted to prepare a fully bio-based unsaturated polyester prepolymer, the process is simple, easy to operate, and the prepolymer is successfully purified in the purification process The double bond is preserved, and the active functional group is reserved for the subsequent dynamic vulcanization. After dynamic vulcanization with polylactic acid, it can not only significantly improve the physical and mechanical properties of polylactic acid such as toughness, but also ensure the prepared biodegradable polylactic acid. Fully bio-based properties of blend materials.

The invention belongs to the technical field of light-emitting materials of photoelectric display devices and particularly relates to a synthesis method of a polyarylether light-emitting material with a main chain containing naphthalimide. The important contents of the synthesis method are as follows: halogenated naphthalic acid anhydride and halogenated aromatic amine are used to synthesize halogenated naphthalimide monomer, and then the halogenated naphthalimide monomer and the prepared bisphenol sodium salt are subjected to nucleophilic substitution reaction to obtain the polyarylether light-emitting material with the main chain containing a naphthalimide structure. Compared with the prior art, the invention has the following advantages that the advantages of small molecules and polymers are combined; and in the preparation process of the material, the cost of raw materials is low, a metal catalyst is not needed, the process is short and the product is easy for purification. The polyarylether light-emitting material prepared by the invention has good stability and good light-emitting performance, can be dissolved in different solvents, is conveniently coated into a film, and isapplicable to manufacture of organic light-emitting devices.

The invention provides a method for preparing a graphene electrode in a high-temperature piezoelectric sensor. The method includes the following steps that a pretreated high-temperature piezoelectric crystal plate of the high-temperature piezoelectric sensor is placed into a plasma chemical vapor deposition cavity, the cavity is closed, and a vacuum pump is started; when air pressure inside the cavity is lowered to 10<-5> Torr or below, shielding gas and carbureted hydrogen gas are connected in to adjust the pressure intensity inside the cavity; and a vacuum reacting furnace is started for heating and warming, a plasma source is switched on to perform constant temperature deposition, and accordingly the graphene electrode can be obtained. According to the preparation method of the graphene electrode, the high-temperature piezoelectric crystal plate is used as a substrate, a small or large number of layers of graphene are grown on the surface of the crystal plate without metal catalysis as the electrode through the plasma enhanced chemical vapor deposition (PECVD) technique directly, adhesive force between a graphene thin film and the crystal plate is good, and electrical conductivity of the graphene thin film is excellent.

The invention relates to a preparation method of hypnone, in particular to a method for preparing hypnone by direct photooxidation under the condition with Alpha-vinyltoluene and without catalyst. The invention belongs to the technical field of organic synthesis application. The Alpha-vinyltoluene and acetonitrile with the volume ratio of 1: (0.4 to 100) are put into a light reactor and stirred. The hypnone is prepared after putting through condensed water into a reactor casing and adjusting the flow rate, maintaining reaction temperature to be room temperature, inletting oxygen into the reactor with the flow rate of 2 to 15ml / min, lighting a 125w medium pressure mercury lamp and reacting for 0.5 to 20 hour(s). The method can be used for synthesizing hypnone directly at room temperature without catalysts so as to reduce synthesis cost; furthermore, the method has the advantages of less toxicity and being environment protective.

The invention discloses a water-based flame-retardant polyester used for UV-LED curing terminal vinyl and a synthesis method thereof. The synthesis method is as follows: add polybasic acid, polyol, functional flame-retardant polyhydroxy compound and functional multi-double bond hydroxylated vegetable oil into the reaction kettle, add organic solvent as water-carrying agent, and heat up to 180~210 o C, reflux reaction until the acid value is lower than 10 mgKOH / g, extract the organic solvent under reduced pressure; cool down to 120~150 o C, add maleic anhydride to react; keep the temperature of the system constant, add metered vinyl functional monomers and polymerization inhibitors containing hydroxyl structures, react for 3 to 5 h, and obtain a mixture containing hydrophilic groups and vinyl groups adducts; cooling to 40~60 o C. Add a neutralizing agent to obtain a carboxylate polyester containing vinyl groups; add deionized water to emulsify and disperse to obtain a UV‑LED curable vinyl-terminated water-based polyester. The vinyl water-based polyester obtained in the present invention has excellent medium resistance, coating film hardness and flexibility, and is very suitable for UV-LED curing water-based coatings.