32 results about "Pyridinium bromide" patented technology

Bactericidal compositions are disclosed that comprise a polymeric compound immobilized on a material. Medical devices are also disclosed which comprise such a bactericidal composition. Methods are disclosed for covalently derivatizing the surfaces of common materials with an antibacterial polycation, e.g., poly(vinyl-N-pyridinium bromide); the first step of the methods involves coating the surface with a nanolayer of silica. Various commercial synthetic polymers derivatized in this manner are bactericidal, i.e., they kill on contact up to 99% of deposited Gram-positive and Gram-negative bacteria, whether deposited through air or water.

The invention discloses polyethylene antistatic filling master batch and a preparation method thereof. The filling master batch is prepared from the following raw materials in parts by weight: 14 to 20 parts of polyethylene, 80 to 90 parts of modified bentonite, 4 to 8 parts of polyethylene wax, 3 to 5 parts of ethylene-bis-stearamide, 2.5 to 2.8 parts of a phosphate coupling agent and 8 to 12 parts of carbon black. The preparation method comprises the following steps: (1) raising the temperature of a high-speed mixing machine to 180 DEG C to 200 DEG C, and keeping the temperature for 5min to10min; (2) adding the modified bentonite, the phosphate coupling agent and the carbon black, and stirring for 15min to 20min; continually stirring and cooling to 110 DEG C to 120 DEG C; (3) adding thepolyethylene wax and the ethylene-bis-stearamide and continually stirring for 1min to 2min; then adding the polyethylene, and mixing and stirring for 4min to 5min; discharging and cooling; (4) extruding and granulating a cooled material to obtain the polyethylene antistatic filling master batch. According to the polyethylene antistatic filling master batch and the preparation method thereof, disclosed by the invention, tetradecyl pyridinium bromide modified bentonite is adopted, and the compatibility between the modified bentonite and the polyethylene is improved, so that the prepared fillingmaster batch is easily dispersed in the polyethylene, and the mechanical property and the antistatic property of the polyethylene are improved.

The invention relates to a preparation method for a fulvestrant midbody. The method specifically comprises the following steps: adding pyridinium bromide perbromide into a compound shown as formula I and dehydrogenizing, and then adding lithium hydroxide into a reaction liquid and reacting, thereby acquiring a compound shown as formula II. According to the invention, pyridinium bromide perbromide is used as a dehydrogenizing agent, one-pot continuous reaction is adopted for realizing dehydrogenizing and bromination two-step reaction, the production technology is simplified, the product yield and quality are promoted, the use of heavy metal reagents, such as copper, is avoided and the environmental pollution is reduced.

The invention belongs to the technical field of environmental protection functional materials, and specifically relates to a novel bismuth halide salt, which is a compound composed of hexaiodobismuth anion and benzylpyridinium cation. The preparation method comprises the following steps: taking a certain amount of benzyl bromide and pyridine, Add an appropriate amount of solvent to mix and dissolve, stir and reflux, then evaporate and concentrate, and then wash with ether to obtain benzylpyridinium bromide; take BiI 3 Dissolve in an appropriate amount of concentrated iodic acid, take a certain amount of benzylpyridinium bromide salt and dissolve it in an appropriate amount of solvent, mix and stir the two solutions to reflux to obtain a clear filtrate, and freeze and crystallize to obtain a new type of bismuth iodide salt. The novel bismuth halide of the invention emits strong orange-red light under the irradiation of 365nm ultraviolet light, rapidly degrades rhodamine B and methyl orange under visible light, and has good cycle degradation efficiency. The invention also provides a preparation method of the novel bismuth iodide salt, the method has high yield, saves cost, is easy to operate, and is beneficial to industrialized production.

The invention relates to the field of hygiene products, and proposes a biological enzyme deodorizing nursing pad, which includes a surface contact layer, a water-absorbing and deodorizing layer and a bottom layer; wherein, the surface contact layer is made of non-woven fabric, and the water-absorbing and deodorizing layer includes a biological enzyme protective agent , composite biological enzyme stock solution, water-absorbing material, and the bottom layer is PE film; wherein, the biological enzyme protective agent includes the following components by weight: 1-5 parts of alcohols, 0.1-0.5 parts of sugars, and a buffer solution with a concentration of 0.5%-0.9 %, the pH value is 4-7, and 0.01-0.03 parts of fungicide; wherein, the compound biological enzyme stock solution is FS compound biological enzyme liquid stock solution with 20-30 parts by weight; wherein, the water-absorbing material includes the following weight components: polymer water-absorbing 20-50 parts of resin, 1-5 parts of modified corn stalk powder, 1-3 parts of cetyl pyridinium bromide, 1-5 parts of thickener, and 3-5 parts of adhesive. Through the above technical solution, the problem of poor deodorization and water absorption in the prior art is solved.

The invention provides a corrosion-increasing interface treatment agent and a preparation method thereof. Cationic exchange resins and fluoride compounds are used as corrosive agents to generate hydrofluoric acid in an aqueous solution to effectively corrode elements in materials and destroy The smoothness of the material interface can expand the effective surface area of ​​the interface and increase the adhesion of the material surface. Secondly, when the corrosion-increasing interface treatment agent is used, phosphate compounds, hydrochloride compounds, and nitrate compounds can form mixed acids, thereby avoiding the corrosion of a single acid of hydrofluoric acid and achieving a corrosion-increasing effect. The present invention also provides a corrosion-inhibiting interface treatment agent and a preparation method thereof, using cation exchange resin and fluoride compounds as corrosive agents to expand the effective surface area of ​​the interface and increase the interface adhesion; surfactant 1227, hexadecyl Trimethylammonium bromide and cetylpyridinium bromide can effectively block the corrosion and hydrogen penetration of hydrofluoric acid on the material surface, reduce the corrosion efficiency, and achieve the corrosion inhibition effect.

The invention relates to the technical field of biological glycomic analysis, and discloses a general low-cost quaternary ammonium salt sugar chain isotope labeling reagent and a synthesis method, including a labeling reagent in the form of heavy isotope deuterated 7-4-methyl-1-( 2-hydrazino-2-oxoethyl)-pyridinium bromide and its corresponding labeling reagent in light isotopic form 4-methyl-1-(2-hydrazino-2-oxoethyl)-pyridinium bromide Onium; can be used for mass spectrometry high-sensitivity and high-accuracy relative quantitative analysis of bioreducing sugar chains of different molecular weight segments; the reagent provided by the invention can greatly improve the mass spectrometry detection sensitivity of sugar chains; it is suitable for small and large molecular weight reducing sugar chains at the same time Relative quantitative analysis of sugar chains by mass spectrometry; low cost of synthetic raw materials, overcoming the disadvantage of high cost of hydrazide-based quaternary ammonium salt stable isotope labeling reagents synthesized based on deuterated isoquinoline.

The invention discloses a method for synthesizing indolizine compounds under the catalysis of silver, which comprises the following steps of in an organic solvent system, stirring N-benzoylmethyl pyridinium bromide as shown in a formula (1) and an isocyanide compound as shown in a formula (2) according to a feeding molar ratio of 1: (1.2-2.0) in the presence of a metal silver salt as a catalyst to react in the air under an alkaline condition, and carrying out TLC tracking detection until the reaction is complete, and carrying out post-treatment on the reaction liquid to obtain the indolizine compound as shown in a formula (3). The method is easy to operate, raw materials and reagents are easy to obtain, reaction conditions are mild, a reaction system is environmentally friendly, products are easy to separate and purify, the yield reaches up to 91%, and the method is suitable for efficient and high-yield preparation of indolizine compounds and particularly suitable for synthesis of various 1, 2-substituted indolizine compounds. The method is suitable for large-scale industrial production, and has wide application prospects and important significance in organic synthesis.

The invention discloses a pyridinium salt metal cobalt porphyrin and its preparation method and its high activity catalytic CO 2 Application in cycloaddition reaction, wherein, the metal cobalt porphyrin is 5,10,15,20-tetrakis(4-(3-(4-(N-ethyl) pyridinium bromide) pyrazolyl) phenyl ) Cobalt (II) porphyrin, belonging to pyridinium salts, is a water-soluble cation. The benefits of the present invention are: the metal cobalt porphyrin provided by the present invention, in its structure, the central metal cobalt can be used as a Lewis acid, and the peripheral pyridinium salt can be used as a Lewis base to play a synergistic catalytic effect. After verification, the metal Cobalt porphyrin exhibits excellent catalytic activity and selectivity in the cycloaddition reaction of carbon dioxide and epoxides, and its catalytic TON and TOF of epichlorohydrin can reach 4320h, respectively. ‑1 and 529h ‑1 , the selectivities are all over 99%.