49results about How to "Achieving Green Chemistry" patented technology

The invention belongs to the diesel oil refining technology, especially a new technology for catalytically cracking light diesel fuel from waste motor oil. Currently, the drawbacks of the prior technology for refining the waste motor oil into diesel oil are that: the cetane number falls short of national standard and the chroma is deep and opaque, the recovery is low and the technology is complex. The new technology comprises the following steps: adding waste motor oil into a reaction kettle; adding a hone-made good catalyst accounting for 1/1000 of the weight of the waste motor oil; heating to 300-500 DEG C to make the waste motor oil catalytically crack, finally obtaining distillation product; putting the distillation product into a condenser, making the condensed liquid-sate light diesel oil and the tail gas through an oil-gas splitter, making the tail gas into a gas collector; split diesel oil flowing into a treatment tank, adding high efficiency treating agent with concentration of 5/10000 into the treatment tank, treating the diesel oil using a backflow spray head; finally layering and filtering the treated light diesel oil by an oil water splitter, namely the yellow transparent light diesel oil with flash point >55 DEG C is obtained, with recovery of higher 80%.

The invention discloses a ZnO/g-C3N4 composite photocatalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing nitrogen-rich organicmatter and deionized water, performing heating in a water bath at 30-90 DEG C, after full stirring is performed, putting the stirred material into an oven, performing drying, performing grinding, performing primary high-temperature calcination on the obtained precursor A in a nitrogen environment, performing secondary high-temperature calcination in an air environment, performing cooling, and performing grinding to obtain g-C3N4; dissolving zinc acetate into methanol, performing titration by using an alkaline solution, after a precipitate is completely precipitated, performing centrifugation,performing washing, performing drying, and performing high-temperature calcination on the obtained precursor B to obtain ZnO; and performing ultrasonic mixing on the ZnO and the g-C3N4 for 0.5-3 h, adjusting the pH of the solution to 4-10 to form the ZnO/g-C3N4 composite photocatalyst. According to the method provided by the invention, the ZnO/g-C3N4 composite photocatalyst prepared by the methodcan effectively separate electron hole pairs and reduce a recombination rate of electron holes, so that the photocatalytic activity is effectively improved.

The invention discloses a sulfur-doped graphite-phase carbon nitride nanosheet photocatalyst and a preparation method and application thereof. The preparation method comprises the following steps that1, a nitrogen-enriched organic matter is placed in a crucible, high-temperature calcination treatment is conducted at 300-500 DEG C, the temperature is maintained for 1-10 h, and cooling is conductedto obtain a precursor A; 2, a sulfur-containing nitrogen-enriched organic matter is ground, and is dissolved in water, oxalic acid is added, and after being fully stirred, a mixture is placed in an oven, and is heated for drying at 60-120 DEG C to obtain a precursor B; 3, the precursor A and the precursor B are mixed, and are subjected to high-temperature calcination subsequently to obtain the product sulfur-doped graphite-phase carbon nitride nanosheet photocatalyst. A sulfur-doped graphite-phase carbon nitride nanometer material can provide more catalytic reaction sites, meanwhile, a builtsulfur-doped structure can trap photo-induced electrons, the photo-induced electrons and photo-induced holes are effectively separated, the recombination rate is reduced, and the photocatalytic activity is improved. The photocatalyst can effectively degrade organic pollutants when irradiated by visible light.

The invention discloses a carbon nitride compounded chromium sesquioxide oxygen-vacancy-containing photo-thermal catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: putting a nitrogen-containing organic matter and a chromium salt input deionized water, stirring and keeping for 0.5-5 hours, and drying so as to obtain a precursor; grinding the precursor, carrying out calcining in an inert gas environment or an air environment, and carrying out natural cooling so as to obtain the carbon nitride compounded chromium sesquioxide oxygen-vacancy-containing photo-thermal catalyst of which the carbon nitride content is 1-5%, wherein the calcining temperature is 200-800 DEG C, and the calcining time is 1-10 hours. By adopting a carbon nitride compounded chromium sesquioxide oxygen-vacancy-containing material prepared by using the method disclosed by the invention, electrons or holes caused by thermal activation can be captured byvirtue of oxygen defects, and carrier recombination can be effectively inhibited, so that photo-thermal catalytic activity can be improved. By adopting the obtained photo-thermal catalyst, organic pollutants can be effectively degraded.

The invention discloses a Cr2O3 thermal catalyst with an oxygen defect material, and a preparation method and application of the Cr2O3 thermal catalyst. The preparation method comprises the followingsteps that an oxygen-enriched chromium-containing compound is put into a crucible to be subjected to be high-temperature calcination treatment in an inert gas environment or an air environment, then cooled and ground, and thus a Cr2O3 thermal catalyst product with the oxygen defect is obtained. A chromium oxide material with the oxygen defect is prepared through the preparation method, the oxygendefect can effectively adsorb pollutants to be subjected to an oxidizing reaction, thus thermocatalytic activity is improved, and in addition, the higher the concentration of the oxygen defect is, thebetter the organic pollutant degrading effect at the same temperature is. By utilizing the obtain the thermal catalyst, the gaseous organic pollutants can be effectively degraded at the low temperature.

The invention discloses a method for dissociating corn stalks by utilizing an ultrasonic microwave enhanced deep eutectic solvent, and belongs to the technical field of corn stalk component separation. The method comprises the following steps: synthesizing a deep eutectic solvent serving as a solvent by taking choline chloride, oxalic acid and glycerol as raw materials, mixing the deep eutectic solvent with corn stalks according to a certain proportion, putting the mixture into a multi-frequency combined ultrasonic emitter, processing the mixture in the ultrasonic emitter for a period of time,taking out the mixture, putting the mixture into a microwave digestion instrument to carry out digestion; after the reaction is finished, regenerating the corn stalks in the system, and measuring thecomponents. The constructed deep eutectic solvent is cheap, natural and pollution-free, and the selected ultrasonic microwave system not only has an outstanding effect, but also can realize the deconstruction of corn stalks under mild conditions. The method is a novel method for dissociating corn stalk components.

The invention discloses a preparation method of a PVC heat stabilizer tin-doped lanthanum acetylacetonate. The preparation method comprises the following steps: (1) preparing a reaction solution, (2)preparing a sodium hydroxide solution, (3) feeding acetylacetone, (4) carrying out a first-stage reaction process, (5) carrying out a second-stage reaction process, (6) carrying out reaction liquid pretreatment, and (7) carrying out ultrasonic-assisted cleaning and after the cleaning is finished, collecting precipitates, namely the PVC heat stabilizer tin-doped lanthanum acetylacetonate. Accordingto the prepared PVC heat stabilizer tin-doped lanthanum acetylacetonate, the adding amount of the tin-doped lanthanum acetylacetonate in PVC is 0.10%-0.15%, and the adding amount of the tin-doped lanthanum acetylacetonate is reduced by 25%-50% compared with that of a common heat stabilizer, by adding and using the heat stabilizer, rapid reduction of the heat stability of PVC can be remarkably inhibited, and meanwhile, the color change time of PVC is prolonged.

The invention relates to a malodorous gas eliminating agent which uses at least one of zeolite powder and clay powder as a carrier and contains camphor, wherein the weight ratio range of the camphor to the carrier is 1:2-99; one or two of citric acid and ferrous sulfate can be additionally added as addition agents, the weight ratio range of the camphor to addition agents is 1:1-2, and the optimal weight ratio range of the camphor to the carrier is 1:7-19; the zeolite powder and the clay powder are obtained by screening fine powder obtained by grinding zeolite or active clay through a screen of 280-380 meshes preferably. The malodorous gas eliminating agent can eliminate malodorous odor after being sprayed into henhouses of a chicken farm or pig houses of a pig farm and can completely and cooperatively eliminate malodorous gas when being sprayed into a refuse dump. When feed materials are processed, the malodorous gas eliminating agent is capable of effectively eliminating odor, forming good quality for materials, also supplying a plurality of trace elements and increasing nutrient ingredients of feeds.

The invention discloses a new synthesis method of a luliconazole key chiral intermediate, belonging to the field of chemical synthesis. The method comprises the steps of firstly, preparing (R)-2-halogenated-1-(2,4-dichlorobenzyl)ethanol, and then carrying out halogenation on hydroxyl so as to obtain the synthesized luliconazole key chiral intermediate, i.e., (S) -2, 4-dichloro-1-(1,2-dihalogenatedethyl)benzene. According to the method, the preparation method of chiral alcohol is completed in a water phase, and an organic solvent does not need to be used, so that the harm of the organic solvent to the environment is reduced; a smaller amount of chiral catalyst is required by the method and can be recycled under the condition of extraction, so that the reaction cost is greatly lowered; furthermore, the method increases the yield of the final product (S)-2, 4-dichloro-1-(1,2-dihalogenated ethyl)benzene and is beneficial to industrial application.

The invention provides a technology for synthesizing acetic acid. A production technology mainly comprises the following step: enabling CO and methanol to generate the acetic acid in a reaction kettleunder the conditions that the pressure is 2.3 to 3.5Mpa and the temperature is 180 to 200 DEG C and under the actions of a rhodium catalyst, an iodomethane accelerant and a lithium iodide stabilizingagent; meanwhile, uniformly recycling an iodine-containing substance in a production process; after oxidizing the iodine-containing substance to obtain the acetic acid, recycling, wherein the recycled catalyst and extraction agent can be repeatedly utilized. A whole process technology is advanced and has the advantages of sufficient energy utilization, less energy source consumption, low production cost, high production efficiency and less investment equipment; a zero-emission environment-friendly technology is realized.

The invention provides a transaminase mutant and an application thereof. The transaminase mutant is obtained by mutation of one or more amino acids in SEQ ID NO: 2 or is a mutant which is obtained bymutation of conservative amino acids at the 54th-63rd site and the 84th-96th site by taking the sequence SEQ ID NO: 1 of wild type CvTA transaminase as a reference. The catalytic activity of the mutants is improved to different extents compared with that of wild transaminase, so that mutants are used for synthesizing chiral amine compounds, especially synthesizing chiral amine with large steric hindrance, the production efficiency is improved, and the industrial production cost is reduced. The biological enzyme is adopted for green chemical synthesis, thereby being beneficial to reducing industrial three wastes.

The invention provides a method for synthesizing terephthalonitrile. The method comprises the following steps: performing catalytic oxidation reaction on paraxylene serving as a raw material in the presence of a vanadium catalyst, and controlling the reaction of synthesizing an intermediate product to obtain the terephthalonitrile. The production of byproducts in the ammoxidation process can be effectively reduced in the reaction process, so that the yield of terephthalonitrile is greatly improved, the raw materials are effectively utilized, impurity products in the product are few, and the post-treatment process is simplified. And the method is beneficial to realization of green chemistry, and is suitable for large-scale production.

The invention provides a polymer continuous bed and method for online ursolic acid enrichment and purification. The polymer continuous bed of a whole porous material is prepared from multi-wall carbonnanotubes with double bonds after silylanization, styrene and ethylene glycol dimethacrylate by redox polymerization. The preparation method is simple, the polymer continuous bed for online ursolic acid enrichment and purification is high in specific surface area and excellent in porous structure, the active force between the polymer continuous bed and ursolic acid is increased, the ursolic acidcan be enriched online effectively, the adsorption quantity is large, the detection limit is low, the precision, sensitivity and accuracy of analysis and detection are improved, the recovery rate is high, operation steps as sample pretreatment are simplified, pretreatment time of samples is greatly reduced, and further the method is economic, practical and facilities green chemistry.

The invention discloses a preparation method and application of a heterojunction MoO3/ZnO photoelectrode film. The method comprises the following steps: putting cleaned conductive glass (FTO) into an acetone solution of MoO3, and obtaining a MoO3 film by adopting an electrophoretic deposition method. Putting ZnO into an acetone solution for ultrasonic dispersion, putting the obtained MoO3 thin film into the acetone solution of ZnO, and overlapping a layer of ZnO thin film on the MoO3 thin film by adopting an electrophoretic deposition method; and carrying out high-temperature annealing on the obtained product to obtain the MoO3/ZnO heterojunction film. The MoO3/ZnO photoelectrode film prepared by the invention is used for improving the photo-induced electron transmission capability of a MoO3 photoelectrode, so that the photoelectrochemical performance can be effectively improved, and the photocorrosion resistance of MoO3 is enhanced.