10 results about "Dimethyl benzene" patented technology

The present application relates to a kind of foam type organic chlorine disinfectant and its preparation method and application, belong to disinfectant technical field.Utilize the modification treatment of magnesium sulfate with polysilicic acid, make and form stable package system between modified magnesium sulfate and organic chlorine, greatly improve the stability and long-acting of effective chlorine component in the process of use;While introducing the synergism between surfactant and sodium dimethyl benzene sulfonate, an additional protective layer is constructed, further strengthens the overall stability of organic chlorine disinfectant, blocks the harmful contact that organic chlorine disinfectant can encounter under complex or adverse environmental conditions, effectively prevents the performance decline or potential harm caused by environmental factors, ensures the safe and efficient use of disinfectant.The foam type organic chlorine disinfectant of the present application utilizes double package system, not only improves the long-acting and stability of disinfection effect, but also significantly enhances the environmental adaptability and use safety of product.

The invention discloses a preparation method and application of a heterojunction catalyst based on a two-dimensional zinc porphyrin metal organic framework, and belongs to the field of photochemical energy conversion and photocatalytic degradation. The invention aims to solve the technical problems of high-quality preparation of the artificial photosynthetic photocatalytic composite material and how to effectively improve the photochemical energy conversion efficiency. The method comprises the following steps: 1, dissolving bismuth nitrate pentahydrate, sodium tungstate dihydrate and sodium dodecyl dimethyl benzene sulfonate in deionized water, fully stirring, and transferring the solution to a reaction kettle for hydrothermal reaction; cooling to room temperature, washing and drying to obtain bismuth tungstate solid powder; 2, adding bismuth tungstate and meso-tetra (4-carboxyl phenyl) porphin into a mixed solution of N, N-dimethylformamide and ethanol, carrying out ultrasonic treatment, and fully stirring to obtain a solution A; dissolving zinc nitrate hexahydrate, pyrazine and polyvinylpyrrolidone in a mixed solution of N, N-dimethylformamide and ethanol, and fully stirring to obtain a solution B; after the solution is fully dissolved, dropwise adding the solution B into the solution A under ultrasonic and stirring conditions, and then putting the beaker into an oil bath pan for heating; and cooling to room temperature, washing, and storing in an ethanol solution to obtain the Zn-MOF / Bi2WO6 heterojunction composite material.

The invention relates to the field of new material fine chemicals, in particular to a method for efficiently preparing a hexachloroxylene product through chlorination reaction of xylene and chlorine under the participation of a chlorobenzene medium.

A laboratory immunohistochemical staining slide fixing and auxiliary operation apparatus, comprising an immunohistochemical staining slide fixing apparatus (1), a storage box (5), and a dedicated filter box for coverslipping (6). The immunohistochemical staining slide fixing apparatus (1) comprises a slide grasping spring (11), a first handle (12) and a second handle (13), one end of the first and second handles (12, 13) being fixed to two sides of the slide grasping spring (11), respectively, and the other ends each being bent inward to form first and second gripping parts (14, 15). By means of squeezing the handles (12, 13) to drive the top of the slide grasping spring (11) to arch open, multiple staining slides (2) can be inserted and positioned on the slide grasping spring (11); releasing the spring (11) can clamp and fix the slides (2) for subsequent batch immunohistochemical staining operations, such as staining and washing, significantly improving experiment efficiency. The storage box (5) enables centralized storage of multiple slide fixing apparatuses (1), preventing small fixing apparatuses (1) from being lost due to random placement, and reducing laboratory losses. The dedicated filter box for coverslipping (6) is used to place a slide (2) to be coverslipped on a filter mesh thereof for coverslipping processing, allowing residual xylene on the slide (2) to be centrally recovered, and thereby improving laboratory environmental safety and the personal safety of operators.

This invention discloses a method for testing the low-temperature crosslinking degree of EVA film, comprising the following steps: Step 1: Selecting a film sample as the first sample; Step 2: Laminating the first sample to form a second sample; Step 3: Cutting the second sample to form multiple third samples; then placing the third samples into a container and adding xylene to the container; Step 4: Placing the third samples into a dimethyl silicone oil bath for low-temperature extraction, with the extraction temperature set at 110±5℃; Step 5: Removing the third samples and drying them; Step 6: Cooling and drying the dried third samples; Step 7: Calculating the degree of crosslinking. This invention's method for testing the low-temperature crosslinking degree of EVA film utilizes a low-temperature heating extraction method to test the crosslinking degree, avoiding secondary crosslinking of the EVA film during continuous heating extraction, ensuring accurate characterization of the actual crosslinking degree of the EVA film, improving the accuracy of test data, and thus reducing the risk of photovoltaic module failure in outdoor environments.

The invention relates to the technical field of pesticides, in particular to a herbicidal composition, preparation and application thereof. The herbicidal composition comprises a component A and a component B, wherein, the component A is benzylazole, and the component B is at least one of acetochlor, butachlor, metolachlo, dimethylphenoxychlor, mesotrione, nicosulfuron, atrazine, terbuthylazine, metribuzin, S-metolachlor and dimethylphenoxychlor. The weight ratio of the component A to the component B is 1:(1-80).

The application discloses a preparation method of N1,N2-dimethyl benzene-1,2-diamine and belongs to the technical field of medical intermediate preparation. The method comprises the following steps: taking o-phenylenediamine as a raw material, reacting with ethyl formate, then adopting dimethyl sulfate to perform a nitrogen-methylation reaction, and finally removing a formyl group under the action of an acid to obtain N1,N2-dimethyl benzene-1,2-diamine. In the method, all raw materials can be conveniently purchased on the market, the process of each reaction is simple, there is no expensive catalyst, the yield is high, and the industrialized production is easy.

The application discloses a toluene disproportionation method for producing dimethylbenzene. The method is characterized in that, under hydrogenation condition, toluene raw material is contacted with a catalyst to generate benzene and dimethylbenzene through toluene disproportionation reaction; the catalyst comprises ZSM-5 molecular sieve with a SiO2 / Al2O3 molar ratio of 10-100 and a binder; wherein, in the ZSM-5 molecular sieve, the amount of external surface acid accounts for 5-40% of the total acid amount, and the external specific surface area accounts for 5-30% of the total specific surface area of the ZSM-5 molecular sieve. The method provided by the application is used for toluene disproportionation reaction, and has the characteristics of high toluene conversion rate, high selectivity of products (benzene+dimethylbenzene), low by-product C9 + A low selectivity.

The invention provides an application of a tobacco bean extract in preparation of an anti-inflammatory and analgesic external medicine, and in a chronic / acute inflammation model, the tobacco bean extract can effectively relieve mouse atopic dermatitis / ear inflammation symptoms induced by dinitrochlorobenzene (DNCB) / xylene; in the aspect of analgesic effect, the tobacco bean extract can relieve mouse pain response caused by hot plate stimulation and prolong the pain threshold latency period; mechanism research shows that the tobacco bean extract can significantly inhibit expression of various inflammation-related cytokines; therefore, the tobacco bean extract can obviously improve various acute and chronic inflammations, can relieve nerves, and has the potential of treating inflammations and inflammatory pain. Besides, the safety evaluation result shows that no obvious toxic reaction is caused in the experimental dose range, the toxicity burden caused by the inducer can be reduced in a disease model, and the safety and the application prospect are good.

The present invention aims to provide a moisture-curing composition that can yield a cured product with excellent properties, including flame retardancy and adhesive properties. [Solution] A moisture-curing composition comprising a urethane prepolymer U having isocyanate groups at its molecular ends, a latent curing agent L that generates an amine by hydrolysis, and a flame retardant F, wherein the flame retardant F comprises two or more different compounds. The flame retardant F comprises a compound M having a structure in which an amine having a triazine ring and a cyclic ketone are hydrogen-bonded, and a phosphate ester compound C having a viscosity of 1 mPa·s to 500 mPa·s at 25°C. The phosphate ester compound C mainly consists of tris(2-chloro-1-methylethyl) phosphate, trixylenyl phosphate, or trioctyl phosphate. The compound M mainly consists of melamine cyanurate.