31results about How to "Low commercial price" patented technology

The invention relates to a preparation method of ultraviolet-resistant and high-temperature-resistant methyl silicone resin, relates to the preparation method of modified methyl silicone resin, and is used for solving the problems that the existing methyl silicone resin is poor in high temperature and ultraviolet resistance, complicated in preparation method and high in cost. The preparation method comprises the following steps of:1, dispersing ethyl orthosilicate in anhydrous ethanol and then adding a mixing solution of deionized water, the anhydrous ethanol and ammonia, thereby obtaining a silica ethanol solution; 2, dispersing tetrabutyl titanate in the anhydrous ethanol and then adding the mixing solution of the deionized water, the anhydrous ethanol and hydrochloric acid, thereby obtaining a titania ethanol solution; 3, dispersing methyl triethoxysilane and diethoxydimethylsilane in the anhydrous ethanol, thereby preparing a methyl silicone resin prepolymer; and 4, regulating the pH values of the solutions obtained in the steps 1 and 2 to be 7 and performing a refluxing operation after adding the prepolymer, thereby obtaining the methyl silicone resin. The method is conventional in raw material preparation as well as simple and easy to implement. The thermal weight loss rate of the modified methyl silicone resin at the temperature of 300 DEG C is 0.6, so that the modified methyl silicone resin is good in ultraviolet resistance.

The invention provides a preparation method of 2, 3, 3, 3-tetrafluoropropene, which comprises the following steps: taking monochlorodifluoromethane (R22) and methane chloride (methyl chloride) as raw materials and carrying out thermal cracking reaction at a high temperature of 600-1000 DEG C under the condition that N2 exits to prepare the 2, 3, 3, 3-tetrafluoropropene, wherein the volume ratio of the monochlorodifluoromethane to the methane chloride is 1-3:1, and the retention time of a reactant is 0.01-0.2 seconds. The reaction raw material used in the preparation method is easy to obtain, the defect of high cost of the used raw material in the prior art is overcome, the production cost is greatly reduced, and the reaction process is simple. The prepared 2, 3, 3, 3-tetrafluoropropene has the advantages of zero ODP and low GWP and can be used as a substitute of an automotive air-conditioning refrigerant.

The invention provides a quantitative detection method for the residual quantity of chlorantraniliprole in the soil. The method is characterized in that the ultrasonic extraction of residual chlorantraniliprole in the soil is conducted in an acetonitrile solvent, and then impurities are removed by adopting a proper amount of MWCNTS and PSA adsorbent. An obtained supernate is subjected to nitrogen-blowing, concentrating and drying, and then the volume is metered by adopting an acetone and n-hexane mixed solvent, wherein the volume ratio of acetone to n-hexane in the mixed solvent is 1:1. After that, the obtained mixture is subjected to programmed warming and separating by adopting a HP-5 chromatographic column, and the ECD determination is conducted by an electronic capture detector. Finally, the residual quantity of chlorantraniliprole is quantitatively detected based on the matrix external standard method. Experiments prove that, the above method is simple, rapid and accurate in operation, easy to popularize and master, and low in cost. Therefore, the method provides a rapid and reliable method for the residual quantity measurement of chlorantraniliprole in the soil, and the requirements of the batch sample analysis on quality and progress can be met.

A preparation method for an anti-ultraviolet heatproof BOPET film relates to a preparation method for a BOPET film, and mainly aims at solving the problems that conventional BOPET films are bad in anti-ultraviolet performance and heatproofness. The preparation method comprises: 1, preparing a sericite solution; 2, preparing a titanium dioxide/sericite solution which is a coating liquid; and 3, immersing BOPET films in the coating liquid for coating by employing a doctor-blade method, drying and rolling. According to the preparation method for the anti-ultraviolet heatproof BOPET film, the employed raw materials are conventional reagents in the field, and have low commercial price; and compared with untreated BOPET films, the prepared anti-ultraviolet heatproof BOPET film is improved in softening point temperature by 20% and obviously reinforced in UV absorption characteristic peak of the film surface after treated by placing in a UV ageing oven under the conditions of 100 DEG for 1 h. The preparation method is simple in technology, does not pollute environment, and is applicable to industrialized production.

The invention discloses a preparation method of a titanium oxide nanoparticle/multilayer graphene composite material. The preparation method adopting nanometer titanium oxide particles as a raw material comprises the following steps: adds nanometer titanium oxide to a DMF and water mixed solution, adding a dilute nitric acid solution, generating organic functional groups on the surface of the nanometer titanium oxide under a 80 DEG C water bath condition, and uniformly depositing the nanometer titanium oxide on the surface of multilayer graphene under the action of the molecular force of the surface of the multilayer graphene to finally obtain the uniformly-compounded titanium oxide nanoparticle/multilayer graphene composite material. The preparation method of the invention is simple, andis suitable for industrial production.

The invention relates to a quantitative detection method for chlorantraniliprole residue in tea leaf. The quantitative detection method is characterized in that the residual chlorantraniliprole in tea leaf is subjected to ultrasonic extraction with an acetonitrile solvent, impurities are removed with a proper amount of MWCNTS and a PSA adsorbent, the supernatant is subjected to nitrogen blowing and concentration to achieve a close drying state, volume metering is performed with an acetone-n-hexane mixed solvent having a volume ration of 1:1, programmed heating separation is performed with a HP-5 chromatographic column, ECD determination is performed with an electron capture detector, and quantitation is performed through a matrix external standard method. According to the present invention, the test results confirm that the method has characteristics of simple, rapid and accurate operation, easy popularizing and grasping and low cost, provides the rapid and reliable method for the determination of the chlorantraniliprole residue in the tea leaf, and can meet the requirements of the large-batch sample analysis on the quality and the progress.

The invention belongs to the technical field of membrane separation and in particular relates to a method for preparing a biodegradable anion-exchange membrane. The method comprises the following steps: by taking microcrystalline cellulose as a base material, performing acidification hydrolysis and amination with hydrochloric acid, and performing cross-linking, thereby obtaining the anion-exchangemembrane which has the characteristics of being high in mechanical strength, good in acid-alkali resistance, good in hydrophilcity, biodegradability, and the like. The membrane is applicable to acid-alkali enriched environments of electroosmosis application environments and can be naturally degraded in the environments after the service life, and the problem that the environment can be damaged byconventional discarded ion exchange membranes can be solved.

An environmentally friendly powdery urea-formaldehyde resin adhesive, comprising the following components in parts by weight: 120-140 parts of starch, 23-33 parts of formaldehyde, 20-24 parts of urea, 3-5 parts of hydrogen peroxide, and sodium hydroxide 3-5 parts, 0.8-1 part of formic acid, 0.6-1 part of ammonia water, 30-40 parts of UF resin, 18-24 parts of nano-copper oxide, 5-10 parts of dispersion liquid; also discloses an environmentally friendly powdery urea-formaldehyde resin The preparation method of the adhesive: adding nano-copper oxide into the nano-copper oxide dispersion liquid to uniformly disperse it, mixing it with oxidized starch and UF resin glue, putting it into the reaction kettle for heating and reacting to obtain a colloidal mixture A, and finally Put it in for spray drying and centrifugation to obtain powdery urea-formaldehyde resin adhesive. To sum up, the present invention has the characteristics of high bonding strength, water resistance, and long storage period. Starch is used as the main raw material, which effectively reduces environmental hazards, reduces production costs, and improves the production benefits of enterprises.

The invention discloses chaetomium thermophilum temperature-resistant catalase and application. An amino acid sequence of chaetomium thermophilum temperature-resistant catalase is shown as SEQ ID No.1. Chaetomium thermophilum temperature-resistant catalase is obtained through heterogeneous expression and fermenting production of chaetomium thermophilum temperature-resistant catalase CatA gene, hashigh resistance to high temperature and high humidity and can be used for replacing antibiotics in livestock-poultry breeding.

The invention provides a preparation method of 2, 3, 3, 3-tetrafloropropylene. The method comprises the following steps: with monochlorodifluoromethane and monochloro methane which are in a molar ratio of (0.5-4):1 as reaction raw materials, preheating the reaction raw materials, then mixing with superheated steam, wherein the volume ratio of the superheated steam to the reaction raw materials is (1-20):1, the temperature of the superheated steam is 900-1100 DEG C, the temperature in the reaction section is 600-1100 DEG C, and the stay time of reactants in the reaction section is 0.01-1s; and quenching, deacidifying, drying and rectifying and separating the product mixed flow to obtain 2, 3, 3, 3-tetrafloropropylene. The method provided by the invention overcomes the deficiency that a hollow tube is prone to carbonization in pyrolysis and side reactions are complex, the equipment maintenance rate is reduced, and meanwhile, the reaction period is prolonged, and the utilization ratio of the device is improved. The method provided by the invention has the characteristics of use of easily available raw materials, simple reaction process and the like. The obtained 2, 3, 3, 3-tetrafloropropylene has the advantages of zero ODP (Ozone Depletion Potential) and low GWP (Global Warming Potential), and is used as a substituent of automotive air conditionor refrigerant.

An antibacterial and low-toxic modified pueraria starch powdery adhesive, comprising the following components in parts by weight: 120-140 parts of pueraria starch, 6-10 parts of montmorillonite, 20-30 parts of casein, 22 parts of sodium acetate ‑24 parts, 3‑5 parts of hydrochloric acid, 7‑9 parts of crosslinking agent, 1‑3 parts of coupling agent, 7‑9 parts of defoaming agent, 25‑35 parts of composite preservative, 13‑17 parts of antibacterial agent, urea 18-22 parts, 17-25 parts of cetyltrimethylammonium bromide, 4-6 parts of potassium permanganate; the present invention also discloses an antibacterial and low-toxic modified Pueraria starch powder adhesive Preparation method: first mix the oxidized kudzu starch, compound preservative and organically modified montmorillonite, then add urea and casein for heating reaction to obtain mixture B, then add dispersant, coupling agent and defoamer to obtain glue The solid C is finally spray-dried and centrifuged to obtain a powdery kudzu root starch adhesive. The invention has the characteristics of high bonding strength, water resistance, antibacterial, long environmental protection storage period, etc., effectively reduces the harm to the environment, reduces the production cost, and improves the production benefit of the enterprise.

The invention relates to the field of veterinary antibiotics, and discloses a water-soluble florfenicol effervescent agent and a preparation method thereof. The florfenicol effervescent agent includes, by weight, 1-20 parts of ultrafine florfenicol powder, 0.2-5 parts of a cosolvent, 3-5 parts of an organic acid (an acid agent), and 1-11 parts of inorganic salt (an alkaline agent), with the balance being a filler and the total being 100 parts. Raw and auxiliary ingredients are safe, easily available and cheap, the process is simple, and the method has advantages of strong operability, low production cost, short preparation time and low production energy consumption, and is suitable for large-scale production and promotion.

An antibacterial and low-toxic modified corn starch powdery adhesive, comprising the following components in parts by weight: 120-140 parts of corn starch, 6-10 parts of montmorillonite, 20-30 parts of casein, 22 parts of sodium acetate ‑24 parts, 3‑5 parts of hydrochloric acid, 7‑9 parts of crosslinking agent, 1‑3 parts of coupling agent, 7‑9 parts of defoaming agent, 25‑35 parts of composite preservative, 13‑17 parts of antibacterial agent, urea 18-22 parts, 17-25 parts of cetyltrimethylammonium bromide; the present invention also discloses a preparation method of an antibacterial and low-toxic modified corn starch powdery adhesive: first corn starch, compound Preservatives and organically modified montmorillonite are mixed evenly, then urea and casein are added for heating reaction to obtain mixture B, then dispersant, coupling agent and defoamer are added to obtain jelly C, and finally spray drying and centrifugation are carried out. Obtain powdery kudzu root starch adhesive. The invention has the characteristics of high bonding strength, water resistance, antibacterial, long environmental protection storage period, etc., effectively reduces the harm to the environment, reduces the production cost, and improves the production benefit of the enterprise.