5196results about How to "Simple post-processing" patented technology

The present invention solves the problem that the existing strong acid resin catalyst has bad high temperature mechanical intensity and complex hole purification technics, brings forward a simple preparing method for pressurization polymerization and hole purification method, the pressurization polymerization improves the uniformity of polymer bead body structure and the high temperature mechanical stability for resin, the extraction is executed by solvent naphtha first and the boiling is executed by halogeno-alkane, the hole purification method is simplified. The prepared strong acid cation resin catalyst has high temperature resistant and excellent catalytic activity and its high temperature stability is better than same kind of product.

The invention relates a kind of preparation method of bio-diesel oil under the condition of solid ac and alk catalyzing. The character is that under the condition of solid ac and alk catalyzing, gain the bio-diesel oil using the craft of exchange reaction of soja oil with carbinol. Afer the reaction, apart catalyser from reaction liquor by centrifugal machine till delimination in quiet placing, the above is rough output, the below is admixture of glycerol and carbinol. Distil the of above to gain bio-diesel oil and to gain the pure glycerin in the same way. The distilled carbinol can be used again and again. The invention has many advantages, for example, its raw material can be rebirth, its craft is easy and only need normal equipment. Even treat the used oil, the whole process is easier compared with the method in solid ac and alk catalyzing, besides, the process will not produce foul water so it is environmental. Every plant of the bio-diesel accords with standards compared with foreign similar competitive grade and the main plants are close to its of 0# (GB252-1994, superior product)diesel of China.

The invention discloses a method for preparing semi-aromatic nylon and belongs to the technical field of macromolecular material synthesis. The method comprises the following steps: (1) uniformly mixing aliphatic diamine and water of which the weight is two to ten times that of the aliphatic diamine, heating the mixture to the temperature of between 50 and 90 DEG C, adding aromatic diacid into the mixture with stirring till a pH value of the solution reaches 7.0-7.7, continuously stirring for 1 to 5 hours, cooling the solution to room temperature, continuously stirring the solution for 1 to 5 hours again, and filtering and drying to obtain nylon salt for later use; and (2) adding the prepared nylon salt and a solvent to a polymerization kettle in a certain mixture ratio (0.5 to 3.0 g/mL), raising the temperature to between 190 and 230 DEG C under the protection of inert gas, keeping the pressure in the kettle between 2.0 and 3.0 MPa, discharging gas after 1 to 5 hours to make the pressure in the kettle reduced to normal pressure within 1 to 5 hours, raising the temperature to between 210 and 270 DEG C, and continuing to react for 1 to 5 hours, and discharging to obtain a powdery semi-aromatic nylon product. The method has mild reaction condition and low energy consumption; the product is easy to mold and machine; and the method solves the difficult problem of difficult discharging of the semi-aromatic nylon, and is applicable to industrialized production.

The invention concretely relates to a synthetic technology for pyraclostrobin. The synthetic technology comprises: firstly performing cyclization to obtain 1-(4-chlorophenyl)-pyrazol-3-one, oxidizing the pyrazol ring under the effect of an oxidant to generate 1-(4-chlorophenyl)-3-hydroxypyrazole, then using 2-nitrobenzyl bromide to performing etherification to generate 1-(4-chlorophenyl)-3-[2-(nitrophenyl)methoxy]-1H-pyrazole, then using a reducing agent to perform nitro reducing, so as to generate N-hydroxyl-2-[N'-(4-chlorophenyl)pyrazol-3'-yloxymethyl]aniline, then using ClCO2CH3 to perform N-acylation reaction to generate methyl N-hydroxyl-N-2-{[N'-(4-chlorophenyl)pyrazol-3'-yloxymethyl]phenyl}formate, and finally performing hydroxyl methylation under an alkaline condition to generate pyraclostrobin. The technology enables all operations in the pyraclostrobin preparation process to be relatively controllable, helps to improve the stability of the preparation process and improve the product yield, successfully employs low-cost reagents and substantially reduces production cost, and also the employed reagents are relatively small in toxicity, is relatively beneficial for environment protection, and has no corrosivity on plastic pipes, so that the production safety is improved.

The invention relates to a type of antibacterial fabric and a preparing method thereof, with the preparing method comprising: adsorbing cross-linking agent to the surface of fabric containing C-H key to obtain the fabric adsorbing cross-linking agent; taking the fabric adsorbing cross-linking agent as filter cloth for filtering oxidation graphite alkene aqueous solution to obtain the fabric containing both the cross-linking agent and the oxidation graphite alkene; and employing radiation crosslinking method or heat crosslinking method to initiate the cross-linking agent upon the fabric containing both the cross-linking agent and the oxidation graphite alkene for crosslinking polymerization, thus to obtain antibacterial fabric, wherein the cross-linking agent contains more than two carbon-carbon double bonds and/or Carbon-carbon triple bonds. The method of the invention is easy to operate, consumes less amount of oxidation graphite alkene, uses less amount of time in post-treatment period, and is of low cost and suitable for large scale industrialized production. Moreover, the antibacterial fabric made in this way keeps great antibacterial performance even after repeated washing. With the cytotoxicity at Level 0 (the highest security level), the antibacterial fabric produces nearly no irritation to skin.

The invention relates to a preparation method of dehydroisoandrosterone. According to the preparation method, a compound 1 is prepared by a compound 2 through esterification reaction, ketalation reaction, reduction reaction and hydrolysis reaction. When the dehydroisoandrosterone is prepared by the chemical synthetic method, the defects of difficulty in control, cumbersome post treatment, high risk, pollution of the environment, and the like in traditional production method are avoided. Compared with the traditional production method, the reaction conditions of the preparation method are easyto control, the post treatment process is simple, and the yield is higher can be up to 80.79% after refining. Raw materials of the preparation method can be prepared by sterol through microbial fermentation, the raw materials are wide in sources, are cheap and relatively environmentally friendly and can be purchased from Hunan Nuokai Biological Pharmaceutical Co., Ltd, and the structural formulasof the compound 1 and the compound 2 are as follows.

The invention relates to a preparation method of a nitrogen and phosphorus containing flame retardant agent, the nitrogen and phosphorus containing flame agent and application thereof. The preparation method comprises the following steps of: carrying out condensation reaction on phenylene diamine and aromatic aldehyde, then carrying out addition reaction with DOPO (9, 10-Dihydro-9-oxa-10-phosphaphenanthrene 10-oxide) to obtain solid nitrogen and phosphorus containing flame retardant agent molecules. The preparation method has the advantages of easiness in control, good repeatability, high yield and suitability for expanded production. The obtained flame retardant agent molecules have amino groups and phenolic hydroxyl active groups and can further react with matters containing expoxy group functional groups. The flame retardant agent molecules contain nitrogen and phosphorus elements and have good expansion char forming characteristic and very good flame retardant effect in the burning process; when the flame retardant agent molecules resist the flaming of the epoxy resin, the flame retardant agent molecules can further undergo cross-linking reaction with resin, thereby increasing the glass transition temperature, the bonding strength, the mechanical property and the like of the resin; meanwhile, the flame retardant agent molecules have good flame retardant property; the limiting oxygen index of the flame retardant agent molecules is substantially increased; and the vertical burning grade of the flame retardant agent molecules reaches a UL-94V-0 grade.

The present invention relates to chemical reaction process of oxidizing alcohol with oxygen to prepare aldehyde or ketone, and is especially an alcohol oxidizing process with 2, 2, 6, 6-tetramethyl piperidine nitroxide free radical as catalyst. In organic solvent, and in the presence of catalyst comprising TEMPO, sodium nitrite and transition metal salt, alcohol is oxidized to produce aldehyde or ketone. The process has the alcohol, TEMPO, sodium nitrite and transition metal salt in the weight ratio of 100 to 1-5 to 1-10 to 1-10, oxygen pressure of 0.1-0.8 MPa, reaction temperature of 0-80 deg.c and reaction time of 1-24 hr. The present invention has the advantages of mild reaction condition, easy control, low cost, high safety and environment friendship.

The invention belongs to the technical field of chemical processes and equipment, and relates to a device for preparing chlorinated polyvinyl chloride by a gas-solid phase method and a method thereof. The chlorinated polyvinyl chloride is prepared from polyvinyl chloride (PVC) and chlorine gas serving as raw materials in a dry state. The device comprises a riser reactor, a turbulent fluidized bed reactor, an upper connecting pipe and a lower connecting pipe, wherein the synthesis of the chlorinated polyvinyl chloride is performed in the riser reactor and the turbulent fluidized bed reactor; a chain initiation process is realized and chain transfer is finished by activating the chlorine gas with ultraviolet light, so that the whole process is decoupled into a quick process and a slow process, the chlorination of the materials is uniform, bonding and discoloration can be effectively prevented, the energy consumption is reduced and the operation is simplified; the device has the advantages of compact structure, high practicability and obvious improvement on the efficiency; hydrogen chloride separated from reaction tail gas can be recycled; and the whole process has no waste discharge.

The invention discloses a preparation method of monodispersity micron-sized polysilicon microspheres which comprises the following steps: (1) adding deionized water and a basic catalyst in trialkoxysilane, and stirring in a nitrogen condition for hydrolysis; (2) centrifugally separating and filtering a mixed system in step (1) to remove unreacted monomers; and (3) adding the basic catalyst in a reaction system obtained from the step (2) for polycondensation, filtering, washing and drying to obtain the monodispersity micron-sized polysilicon microspheres. According to the method, the reaction temperature is low, the reaction can be conducted at room temperature, the synthesis steps are simple; the method does not use organic solvents which pollute the environment or emulsifiers in the reaction process, is simple in post treatment, less in types of raw materials, high in yield, and low in preparation cost, and can effectively adjust the grain size range of the microspheres to realize controllable sizes; and the obtained silicon microspheres are good in grain size uniformity and high in monodispersity, and has extremely good sphericity.

The invention relates to stirringless, internal circulating and double coordinating electrolyzing oxide treatment technology for organic waste water which is difficult to be degradated, particularly for the waste water containing phenol. Internal circulating plate frame electrolytic tank is used, Ti group PbO2 electrode is used as positive pole, stainless steel is negative pole, waste water containing phenol is used as electrolyte to discharge and generate strong oxide group-hydroxyl free radical on positive pole, negative pole get electron to form H2O2, negative and positive poles are coordinated action to realize deep oxide decomposing to phenol pollutant, and then to achieve the goal of treating waste water containing phenol.

The present invention provides an electrochemical oxidation technique of waste water containing chlorobenzene compound, which is carried out in an electrocatalysis reaction tank, wherein a titanium-base bimetal lead oxide electrode modified by fluoro resin serves as the anode, a corrosion resistant plate serves as the cathode, an active beehive ceramic particle electrode is filled between the anode and the cathode, the waste water containing chlorobenzene compound serves as the electrolyte, a pulse direct current stabilized current power supply is adopted, thereby the chlorobenzene compound of the waste water is removed. The active beehive ceramic particle electrode is composed of Mn, Sn and Sb active component and a gamma-Al2O3 beehive ceramic carrier. The present invention has the advantages of compact equipment, excellent stability, low operating cost, easy operation and simple post treatment; besides, the present invention has a major market development prospect.

The invention relates to an L-2-reanal biological preparation method, which includes: utilizing L-threonine as raw materials, stirring the L-threonine in water at the temperature of 15-50 DEG C under the catalytic action of L-threonine deaminase and whole cells with a leucine dehydogenase and coenzyme regenerating function, and obtaining L-2-reanal after reaction. In the L-2-reanal biological preparation method, water is used for substituting for buffer salt solution to form a water-phase reaction system, cost of raw materials is reduced, threonine deaminase and whole cells used for catalyzing can be produced in batch by fermentation of microorganisms, are low in cost and wide in sources. Biological enzymatic catalysis reaction is water-phase reaction, transformation conditions of the enzymic method are mild, raw materials are transformed thoroughly, post-treatment is simple, products are separated by isoelectric point crystallization technology and film evaporation separation technology jointly, and the L-2-reanal biological preparation method is capable of recovering water and ammonium formate is low in cost, free of discharge of waste water and waste residues, environment-friendly in process and applicable to industrialized production of the L-2-reanal.

The invention discloses a fermentation method for the production of recombination protein by lactose-induced pMFH carrier. According to the invention, expression of target protein is induced by successfully replacing IPTG with lactose as inducer mainly on the basis of formula of optimized fermentation culture medium, formula of feeding liquid prior to inducement, formula of feeding liquid subsequent to inducement and formula of lactose inducing liquid. The expression of the target protein is high, and level of the target protein in total protein of strain can reach 35 to 49%, which is equivalent to that IPTG inducing level. In addition, after lactose is added for inducement in the process of fermentation, glycerin is also added to serve as carbon source, which can not only raise biomass remarkably, but also reduce the generation of byproducts of metabolism, i.e. acetic acid, and avoid the influence of the presence of glucose in the fermentation liquid on lactose inducing effect. Obviously, the method according to the invention is not only simple and convenient, short in fermentation time and low in production cost, but also achieves no residual toxic substances in the resultant product.

The invention belongs to the technical field of environmental geotechnics and discloses a river silt cleaning system. The river silt cleaning system comprises a carrier, a silt cleaning device, a mud making device and a mud storage device, wherein the silt cleaning device is fixed on the carrier and goes deep into a river silt seam to clean river silt; the mud making device is connected with the silt cleaning device, smashes the river silt and makes the river silt into mud; the mud storage device is connected with the mud making device and stores the mud. The river silt cleaning system is efficient, convenient, anti-clogging and low in pollution.

The invention relates to preparation and application methods of ratio-dependent bisulfite ion fluorescent probes, belonging to the technical field of anion detection. The probe molecules have recognition specificity for bisulfite ions in a neutral aquatic environment, generate fluorescence ratio variations, have very high sensitivity, and meanwhile, cause obvious color and fluorescent color variations. The fluorescent probes do not generate obvious variations for other ions, free radicals or molecules. The invention implements recognition specificity of the probe molecules for the bisulfite ions, provides the fluorescent probes with color comparison sensing function, and thus, has wide application prospects in the fields of biology and ion detection.

The invention discloses a laser barcode reading device and a barcode reading method. The reading device comprises a blue light laser, a deflecting mirror, a swingable reflecting mirror, an optical collector, a light filter, a photoelectric receiver, an amplification processing circuit, a processor connected with the amplification processing circuit and controlling the blue light laser, and a power module. The reading method comprises the following steps of: receiving scanning optical signals; performing analog digital conversion and acquisition of the scanning optical signals; performing fast Fourier transform; removing high-frequency component; performing fourier inversion; calculating a threshold by using an Otsu method; performing binaryzation on barcode signals according to the threshold; and decoding according to various barcode standards. The laser barcode reading device has the advantages of reasonable design, simple and convenient operation, low input cost and good using effect and adopts the brand-new blue laser scanning source to scan one-dimensional barcodes; and the invention also provides a barcode reading method with high recognition performance, strong resolution and high recognition precision so as to simplify an electronic hardware part of the barcode reading device.

The invention discloses a preparation method of cationic surfactant modified fly ash, which comprises the following steps of: firstly performing pretreatment and hydroxylation treatment on the surface of fly ash to obtain hydroxylated fly ash to obtain a grafting point; then modifying the fly ash by use of a coupling agent; and finally performing grafting reaction with a cationic surfactant polyacrylamide to obtain cationic surfactant modified fly ash. According to the preparation method disclosed by the invention, the polyacrylamide is grafted on the surface of the fly ash, and the adsorption property of the grafted fly ash is greatly changed; particularly the fly ash is applied to a cement-based composite material, and the fracture resistance of the cement-based composite material is obviously improved; and the preparation method disclosed by the invention has the advantages of low reaction temperature, mild conditions, simple after-treatment and low industrialization cost.

The invention discloses a method for preparing a polyaniline/manganese dioxide composite material for a super capacitor, which adopts permanganate as an oxidizer to oxidize aniline to directly obtain the polyaniline/manganese dioxide composite material. The method can ensure the contact of manganese dioxide and polyaniline at molecular level by oxidizing the aniline by the permanganate, has no an impurity phase after a reaction at the same time, and simplifies subsequent treatment work. The method for preparing the polyaniline/manganese dioxide composite material for the super capacitor has the advantages of simple process, convenient operation and convenient control, ensures that the electric conductivity of the prepared polyaniline/manganese dioxide composite material is effectively improved, and is suitable for mass industrial production.

The invention relates to a method for preparing an oxazolidinone compound and an intermediate thereof. Specifically, two fragments are coupled to prepare the oxazolidinone compound by virtue of Suzuki reaction. The method is simple in process, short in reaction time and high in yield and is suitable for industrial production. Furthermore, the method for preparing the intermediate of the oxazolidinone compound has the advantages of simplicity in operation, high yield and low cost.

The invention relates to a method for preparing hydrophobically modified xanthan. The method comprises the following steps: taking water/iso-propyl alcohol mixing liquid as a solvent, taking ammonium lauryl sulfate as an emulsifying agent, taking alkyl bromide as an etherifying agent, and carrying out reaction under the temperature of 30 to 120 DEG C and the pH of 6 to 9 to modify xanthan to obtain the hydrophobically modified xanthan. The conditions of a synthesis reaction are wild, raw materials are easy to obtain, monomer conversion is high, and products are convenient to process. The hydrophobically modified xanthan still has higher viscosity when the xanthan has lower molecular weights, has good salt resistance, has good degradable performance so as to be convenient to perform subsequent sewage treatment, and has good environment affinity. The method is suitable for the oil extraction production of high salinity oil reservoirs.