30results about How to "Reduce the degree of decomposition" patented technology

A process for preparing iminodiacetonitrile from hydroxy acetonitrile and ammonia water includes such steps as respective pre-heating, mixing and reacting.

The invention belongs to the technical field of the spent fuel reprocessing and discloses a device for continuously destructing a radiative waste organic solvent. The device comprises a constant-temperature tank and an electrochemical oxidation destruction container located in the constant-temperature tank; the container is mainly composed of an anode chamber, a cathode chamber and a clarifying chamber; the radiative waste organic solvent goes into the clarifying chamber by use of a waste organic solvent feeding pipe; when the solvent is higher than a separator between the clarifying chamber and the anode chamber, the solvent goes into the anode chamber. The non-destructed waste organic solvent is mixed with water into a mixed solution which goes into the clarifying chamber by use of a liquid flow channel between the anode chamber and the clarifying chamber, the separation of the organic phase and the water phase is realized in the clarifying chamber, and the water phase located below contains redionuclides and is charged by use of a water phase drainage pipe at a certain rate; besides, the organic phase located at top is mixed with the waste organic solvent added by use of the waste organic solvent feeding pipe and then the mixture flows into the anode chamber by use of the upper channel of the separator. The device is capable of meeting the requirements on improving the current effectively and realizing continuous destruction of waste organic solvents.

The invention discloses a method for preparing lanthanum nickel oxide (LNO) ceramic target. The method comprises the following steps of preparing LNO gel by the citric acid method, then drying, grinding, cold-pressing, pre-burning and deguming, and sintering and forming the LNO gel to obtain the LNO ceramic target. In the sintering step of LNO ceramic target preparation, the long-time sintering at relatively lower temperature (about 800 DEG C) is adopted, which enables the LNO ceramic target to be preformed, then the short-time sintering at high temperature (950 to 1100 DEG C) is carried out, which can prevent the LNO ceramic target from decomposition; in addition, the short-time sintering at high temperature is carried out in a high-pressure highly pure oxygen environment, so the forward decomposition reaction of LNO is difficult to perform, and decomposition rate of LNO is lowered greatly; furthermore, the LNO film prepared by pulsed laser deposition (PLD) method has good effect.

The invention relates to a thermoplastic resin and a functionalization method thereof. The thermoplastic resin can be functionalized without the need of an initiator or a bonding agent to promote thereaction, thereby having specific functional properties. In particular, the present invention relates to a method of covalently modifying a thermoplastic resin by using a plasma method before or afterthe step of introducing an active agent having the functional properties into a thermoplastic resin.

The invention discloses bacillus licheniformis, a screening method, application and a feed containing the bacillus licheniformis. The bacillus licheniformis is reserved at a China center for type culture collection, and the reservation number is CCTCC M 2019165. The screening method comprises the steps of collecting soil samples, culturing and dividing bacterial strains, separating and purifying the bacillus licheniformis, conducting molecular identification, conducting biochemical identification, and identifying and screening out the bacillus licheniformis according to a molecular identification result and a biochemical identification result. The screened bacillus licheniformis is used for preparing mulberry silage, the protein content of the feed is increased so that animals can have sufficient nitrogen source supply, the content of crude fiber needs to be reduced so that the animals can have more easily decomposed carbohydrates, the ratio of ammoniacal nitrogen to total nitrogen needs to be reduced so that the protein of the silage and the decomposition degree of amino acid can be reduced, and thus the silage with better quality can be formed.

The invention discloses a method for feeding acetone cyanohydrin during preparation of methyl methacrylate. The method comprises a step of jetting acetone cyanohydrin into an amide circulation loop, wherein the amide circulation loop is composed of an amide cooler, a gas separator and an amide circulation pump which is located between the outlet of the gas separator and the inlet of the amide cooler. According to the invention, through jetting of acetone cyanohydrin into the amide circulation loop at a plurality of positions, smaller acetone cyanohydrin drops are formed, so material mixing is more sufficient and faster, the decomposition degree of acetone cyanohydrin is reduced, the conversion rate of amide is increased, and unnecessary consumption of acetone cyanohydrin is lowered; thus, the conversion rate of an acylation reaction is increased.

The invention relates to a method for extracting and recovering hemicelluloses in squeezed waste alkalis, belongs to the chemical fiber making industry field, and especially belongs to the processing field of the squeezed waste alkalis in the viscose fiber production making process. Hemicelluloses in the squeezed waste alkali are recovered through neutralizing, precipitating, filtering and drying steps. The method adopts alkalescence as a neutralizing end point, and the polymerization degree of the hemicelluloses is high, so the recovery rate can reach above 80%. The finally obtained hemicelluloses comprise 95% or more of the hemicelluloses (oven dry) and 0.5% or less of ash, and can be sold directly or exploited as a next-step synthesis raw material.

The invention discloses a determination method for OCPs in an environmental sample, which belongs to the field of detection of OCPs. The determination method comprises the following steps: carrying out Soxhlet extraction on a to-be-determined environmental sample so as to obtain a liquid extract containing OCPs; carrying out separation and purification, i.e., concentrating the liquid extract to a constant volume, adding an aqueous solution of tetrabutyl ammonium sulfite and isopropanol, carrying out oscillation until a solid residue is generated after repeated shaking every time, discarding a lower layer, retaining an organic phase, washing the organic phase, removing water by using anhydrous sodium sulfate, carrying out purification by using a Florisil column so as to obtain an eluate, concentrating the eluate to a constant volume and dividing the concentrated eluate into two groups which are used as samples for subsequent detection, wherein one of the groups is a sample of OCPs stable in sulfuric acid and is purified by using a sulfuric acid silica gel column so as to obtain a purified sample, and the other of the groups is a sample of OCPs instable in sulfuric acid and is purified by using an Envi-carb SPE small column so as to obtain a purified sample; and carrying out determination, i.e., respectively analyzing and determining the two groups of purified samples by using an HRGC-HRMS apparatus so as to obtain determination results of the content of OCPs in the two groups of purified samples. The determination method provided by the invention enables accuracy and sensitivity of determination to be improved.

A process for preparing iminodiacetonitrile from hydroxy acetonitrile and ammonia water includes such steps as respective pre-heating, mixing and reacting.

The invention discloses a neutralization method of a chlorination solution. The neutralization method comprises the steps as follows: cooling the chlorination solution, then, adding a weak alkaline aqueous solution for neutralization until the pH value is 5.5-7.5, adding a strong alkaline aqueous solution for neutralization until the pH value of the reaction solution is 8.5-9.5, finally, adding aconcentrated hydrochloric acid aqueous solution to the reaction solution, and adjusting the pH value of the reaction solution to 6.5-7.5. The weak alkaline aqueous solution and the strong alkaline aqueous solution are combined for use, excessive hydrolysis of sucralose-6-acetate is effectively inhibited in the chlorination solution neutralization process, and the yield of sucralose-6-acetate is increased; meanwhile, the decomposition degree of a DMF solvent in the system is slowed down, and loss of the solvent is reduced. Non-ammonia nitrogen alkaline solutions are used, low-concentration DMFwastewater is fully utilized as water for alkali dissolution, the wastewater treatment cost in the production process is reduced, and the production cost is reduced.

The invention provides an electroluminescent compound, and a thermal activation delayed fluorescence material and applications thereof, wherein the electroluminescent compound has a structure represented by a formula I, is a small molecular compound containing a boron heterocyclic ring, has TADF characteristic, and can be used as a thermal activation delayed fluorescence material in the light emitting layer of an OLED device, the OLED device comprises an anode, a cathode and at least an organic film layer located between the anode and the cathode, and the light emitting layer in the organic film layer comprises the thermal activation delayed fluorescence material. According to the invention, the electroluminescent compound can effectively reduce the overlapping between HOMO and LUMO through the special design of the molecular structure, so that the delta EST is reduced to less than 0.25 eV, the requirement that the triplet state energy reversely passes through singlet state is met, thetransmission capacity of two kinds of carriers is effectively improved, and the carrier balance is improved so as to significantly improve the light emitting efficiency of the OLED device.

The invention belongs to the technical field of polymeric materials and particularly relates to a nylon wire for 3D printing and a preparation method thereof. The nylon wire for 3D printing is made from 50-90 parts of nylon 12 granules, 10-30 parts of talcum powder masterbatch, 5-25 parts of a maleic anhydride grafted polymer, 2-10 parts of a coupling agent, 0.5-2 parts of an antioxidant, 0.2-1.5parts of a lubricant, and 1-5 parts of color masterbatch. The preparation method herein includes the steps of drying materials, mixing at high speed, blending and extruding for granulating, drying forthe second time, and extruding a wire. The nylon wire for 3D printing provided herein has low cost, good processing convenience, low shrinkage, good stability and high mechanical strength; a printedarticle is free of evident warping and has high precision.

An object of the present invention is to provide a conductive coating film formed of a copper paste on an insulating substrate which has a good conductivity and a good adhesion property to the insulating substrate. The process for producing a conductive coating film according to the present invention comprising the steps of applying a copper paste comprising copper particles, a binder resin and a solvent as main components onto an insulating substrate to form a coating film on the substrate, and then drying the coating film to obtain a copper powder-containing coating film; treating the copper powder-containing coating film with an organic acid or an organic acid salt; and subjecting the thus treated copper powder-containing coating film to heat treatment with superheated steam. According to the present invention, it is possible to obtain a conductive coating film having a good conductivity and a good adhesion property to the insulating substrate.

The invention discloses a method for processing coffee fruits through anaerobic fermentation. The method for processing the coffee fruits through anaerobic fermentation comprises the following steps:fruit cleaning, steam sterilization, drying fruit sorting, fruit classifying, first-time anaerobic fermentation, second-time anaerobic fermentation, heated esterification, dried shelling and baking. By employing the method for processing the coffee fruits through anaerobic fermentation, disclosed by the invention, uncontrollable factors during fermentation caused by external environments can be reduced; and through fermentation for a relatively long time in an anaerobic environment, the mellow and full mellowness and relatively good sweet taste of coffee beans are improved, and uncomfortable dryness, astringency and acetic acid are avoided. During anaerobic fermentation, variables such as pectin residual, temperature and time are conveniently controlled, a fermentation process can become slower and more stable due to low-temperature control; and due to accurate-controlled anaerobic fermentation, a slight sweet and sour taste can be brought, and the mellowness is perfect.

The invention discloses a pleurotus eryngii cultivation material containing pleurotus eryngii residues and a preparation method thereof, and belongs to the field of edible fungus cultivation materials and preparation methods thereof. The cultivation material is prepared from the following raw materials in parts by mass: 55.0-65.0 parts of a fermented main material, 8.0-12.0 parts of soybean meal, 6.0-9.0 parts of corn meal, 18.0-22.0 parts of wheat bran, 1.0-3.0 parts of lime and 1.0-3.0 parts of light calcium carbonate. The fermented main material is mainly prepared by mixing and fermenting bagasse, mushroom residues, corncobs and saw dust in a mass ratio of 1 to 1.1 to 2 to 2. The preparation method comprises the following steps: A, cleaning pleurotus eryngii residues; B, screening the pleurotus eryngii residues; C, prewetting; D, mixing, composting and fermenting the bagasse, residues, corncobs and saw dust; E, turning; F, screening the mixed material; and E, adding the soybean meal, corn meal and other auxiliaries. According to the cultivation material, the raw material cost can be remarkably reduced, and the cultivated pleurotus eryngii has the advantages of high yield, high quality, small budding amount, low pollution and improved biological efficiency.

The invention discloses a method for preparing nafcillin acid. The method includes the following steps: 1) performing chlorination on 2-ethyoxyl naphthoic acid and excessive thionyl chloride to obtain acyl chloride liquid, steaming in a decompression mode to remove thionyl chloride, and dissolving the residue through dichloromethane to obtain solution A; 2) adding triethylamine and dichloromethane in 6-aminopenicillanic acid, and stirring until the solution is clear to obtain solution B; 3) dropwise adding the solution A into the solution B to perform condensation reaction, and preserving the temperature for 30-90mins to react after the dropwise adding is finished to obtain solution C; 4) adding buffer agent into the solution C to obtain solution D; and 5) acidizing the solution D to separate an organic layer, washing, drying, steaming in a decompression mode to remove dichloromethane, and performing recrystallization on the obtained solid through alcohols solvents to obtain the nafcillin acid. The method for preparing the nafcillin acid is easy and simple to operate, simple in aftertreatment and high in yield.

The invention discloses a household ozone generator, and belongs to the technical field of ozone generators. The household ozone generator comprises an outer frame, the left side surface of the outerframe is fixedly connected with the right side surface of a support frame, the lower surface of the inner wall of the support frame is fixedly connected with the lower surface of a first water tank, the right side surface of the first water tank communicates with the left end of a filter, and the filter is clamped on the left side surface of the inner wall of the outer frame. According to the household ozone generator, the first water tank, a water inlet pipe, a water outlet pipe, a first connecting pipe, a second connecting pipe, a water injection frame, the outer frame and the supporting frame are arranged, so that the flow velocity of air around the first water tank is increased, and then water flow in the water injection frame takes away heat on the surface of an electrolysis ozone generator main body. According to the device, the cooling process of water flow on the electrolysis ozone generator main body can be realized while water is added for electrolysis to prepare ozone, the probability of temperature rise is reduced, the degree of ozone decomposition caused by heat in the working process can be reduced to a certain extent, and the ideal ozone preparation efficiency of thedevice is ensured.

The invention discloses fumigated jujubes. The fumigated jujubes comprise the following components: cold-shock jujubes and compound smearing microcapsules. The fumigated jujubes comprise the cold-shock jujubes and the compound smearing microcapsules. The cold-shock jujubes are subjected to pulse electric field boiling and ultrasonic cold shock during preparation, so that the jujube skin is purplein color, thin, shallow and uniform in wrinkles and complete in appearance, and the pulp is elastic. The compound smearing microcapsules not only strengthen the metal nutrient elements such as calcium, iron, zinc and selenium, but also strengthen non-metallic nutrient elements such as fat, dietary fibers, vitamins and amino acids, and simultaneously enhance the jujube flavor of the product. The fumigated jujubes are rich in nutrients, and the fumigated jujubes also enrich food variety, and greatly meet the requirements of consumers.

The present invention first prepares exchange salt, adopting silver nitrate and potassium nitrate mixture, wherein the mass ratio of silver nitrate and potassium nitrate being 1: 8-1 : 10, uniformly stirring, preliminary drying waveguide piece and prepared salt in far infrared oven for removing moisture, then heating up to 350 degree centigrade, to proceed ion exchange by putting waveguide piece in melting salt, taking out waveguide piece and natural cooling, whole process being processed on lucifugal condition. The present invention reduces silver nitrate extent decomposition, raising waveguide surface ionic exchange quality, thereby improving made Erbium waveguide amplifier surface quality.

The invention relates to the field of medicaments, and particularly relates to a medicinal preparation and a preparation method and application thereof. The medicinal preparation is prepared from benzoyl peroxide with specific particle size distribution, and when the medicinal preparation is prepared into a mixed preparation together with clindamycin phosphate, the stability of the medicinal preparation can be sufficiently improved, the decomposing degree of two effective components, namely, benzoyl peroxide and clindamycin phosphate, is greatly reduced, and the problem of poor stability of apreparation with the two effective components, namely, benzoyl peroxide and clindamycin phosphate, in long-term storage is solved. The preparation method of the medicinal preparation is simple in process, convenient in operation, short in production cycle, and suitable for large-scale industrialized production. The medicinal preparation disclosed by the invention is applicable to preparation of external medicaments, preferably applicable to preparation of a medicine for treating acne, can effectively inhibit the decomposition of two effective components, namely benzoyl peroxide and clindamycinphosphate, can be stably stored for a long time and can keep efficacy for a long time.

The invention discloses a method for feeding acetone cyanohydrin during preparation of methyl methacrylate. The method comprises a step of jetting acetone cyanohydrin into an amide circulation loop, wherein the amide circulation loop is composed of an amide cooler, a gas separator and an amide circulation pump which is located between the outlet of the gas separator and the inlet of the amide cooler. According to the invention, through jetting of acetone cyanohydrin into the amide circulation loop at a plurality of positions, smaller acetone cyanohydrin drops are formed, so material mixing is more sufficient and faster, the decomposition degree of acetone cyanohydrin is reduced, the conversion rate of amide is increased, and unnecessary consumption of acetone cyanohydrin is lowered; thus, the conversion rate of an acylation reaction is increased.

The invention relates to a method for extracting and recovering hemicelluloses in squeezed waste alkalis, belongs to the chemical fiber making industry field, and especially belongs to the processing field of the squeezed waste alkalis in the viscose fiber production making process. Hemicelluloses in the squeezed waste alkali are recovered through neutralizing, precipitating, filtering and drying steps. The method adopts alkalescence as a neutralizing end point, and the polymerization degree of the hemicelluloses is high, so the recovery rate can reach above 80%. The finally obtained hemicelluloses comprise 95% or more of the hemicelluloses (oven dry) and 0.5% or less of ash, and can be sold directly or exploited as a next-step synthesis raw material.

The invention belongs to the technical field of the spent fuel reprocessing and discloses a device for continuously destructing a radiative waste organic solvent. The device comprises a constant-temperature tank and an electrochemical oxidation destruction container located in the constant-temperature tank; the container is mainly composed of an anode chamber, a cathode chamber and a clarifying chamber; the radiative waste organic solvent goes into the clarifying chamber by use of a waste organic solvent feeding pipe; when the solvent is higher than a separator between the clarifying chamber and the anode chamber, the solvent goes into the anode chamber. The non-destructed waste organic solvent is mixed with water into a mixed solution which goes into the clarifying chamber by use of a liquid flow channel between the anode chamber and the clarifying chamber, the separation of the organic phase and the water phase is realized in the clarifying chamber, and the water phase located below contains redionuclides and is charged by use of a water phase drainage pipe at a certain rate; besides, the organic phase located at top is mixed with the waste organic solvent added by use of the waste organic solvent feeding pipe and then the mixture flows into the anode chamber by use of the upper channel of the separator. The device is capable of meeting the requirements on improving the current effectively and realizing continuous destruction of waste organic solvents.

The purpose of the present invention is to provide a conductive coating film formed on an insulating substrate using a copper paste and having excellent conductivity and adhesiveness to the insulating substrate. This method of producing the conductive coating film involves a step for forming a coating film on the insulating substrate using a copper paste which has a copper powder, a binder resin and a solvent as the main components, and drying the same to obtain a copper powder-containing coating film, a step for treating said copper powder-containing coating film with an organic acid or organic acid salt, and a step for heat-treating the copper powder-containing coating film with superheated steam. This method enables obtaining a conductive coating film with excellent conductivity and also with excellent adhesiveness to the insulating substrate.

The present invention relates to a method of purifying chlorogenic acid with the complexation extraction technology. A complexation extractant used as a light phase for extraction contacts with plant extract used as a heavy phase to perform complexation and extraction; and the organic phase with the chlorogenic acid is stripped to prepare high-purity chlorogenic acid. The present invention is suitable of low-concentration plant extract; when the separation process of complexing and extracting the chlorogenic acid is used, the production cost can be decreased, the organic solvent residue can be reduced, the environmental pollution is slowed, and the present invention fits requirements of the green chemical technology.

The invention discloses a method for preparing lanthanum nickel oxide (LNO) ceramic target. The method comprises the following steps of preparing LNO gel by the citric acid method, then drying, grinding, cold-pressing, pre-burning and deguming, and sintering and forming the LNO gel to obtain the LNO ceramic target. In the sintering step of LNO ceramic target preparation, the long-time sintering at relatively lower temperature (about 800 DEG C) is adopted, which enables the LNO ceramic target to be preformed, then the short-time sintering at high temperature (950 to 1100 DEG C) is carried out,which can prevent the LNO ceramic target from decomposition; in addition, the short-time sintering at high temperature is carried out in a high-pressure highly pure oxygen environment, so the forwarddecomposition reaction of LNO is difficult to perform, and decomposition rate of LNO is lowered greatly; furthermore, the LNO film prepared by pulsed laser deposition (PLD) method has good effect.

The invention relates to the technical field of polymer materials, in particular to a polypropylene consumable for 3D printing and a preparation method thereof. The polypropylene consumables for 3D printing of the present invention are composed of polypropylene, thermoplastic elastomer, talcum powder masterbatch, maleic anhydride grafted polypropylene, antioxidant, lubricant, hyperdispersant and color masterbatch. In the present invention, thermoplastic elastomer is added to polypropylene to increase the toughness of the composite material; talcum powder masterbatch is added to reduce product cost and crystallization and shrinkage of matrix resin, and improve the forming precision of 3D printing; adding maleic anhydride grafted polypropylene to improve matrix resin The binding force with talcum powder; adding compound antioxidants can reduce the aging and decomposition of materials during the extrusion process, prolong the service life of the product, and interact with each auxiliary material to reduce shrinkage and improve anti-aging ability at the same time The result is that the obtained polypropylene consumables for 3D printing are not easy to crystallize, have good toughness, small shrinkage after molding, and strong anti-aging ability.

The invention discloses a determination method for OCPs in an environmental sample, which belongs to the field of detection of OCPs. The determination method comprises the following steps: carrying out Soxhlet extraction on a to-be-determined environmental sample so as to obtain a liquid extract containing OCPs; carrying out separation and purification, i.e., concentrating the liquid extract to a constant volume, adding an aqueous solution of tetrabutyl ammonium sulfite and isopropanol, carrying out oscillation until a solid residue is generated after repeated shaking every time, discarding a lower layer, retaining an organic phase, washing the organic phase, removing water by using anhydrous sodium sulfate, carrying out purification by using a Florisil column so as to obtain an eluate, concentrating the eluate to a constant volume and dividing the concentrated eluate into two groups which are used as samples for subsequent detection, wherein one of the groups is a sample of OCPs stable in sulfuric acid and is purified by using a sulfuric acid silica gel column so as to obtain a purified sample, and the other of the groups is a sample of OCPs instable in sulfuric acid and is purified by using an Envi-carb SPE small column so as to obtain a purified sample; and carrying out determination, i.e., respectively analyzing and determining the two groups of purified samples by using an HRGC-HRMS apparatus so as to obtain determination results of the content of OCPs in the two groups of purified samples. The determination method provided by the invention enables accuracy and sensitivity of determination to be improved.