7 results about "Benzil" patented technology

The embodiment of the invention provides a method for preparing benzil by oxidizing benzoin, which comprises the following steps: S1, adding benzoin and a ferric ion solution into a reaction kettle, stirring and heating for reaction; s2, sampling and layering in the reaction process, observing the color of a water phase, introducing chlorine gas into the reaction kettle when the water phase is changed from brown yellow to green, and introducing the chlorine gas below the liquid level of the reaction liquid; s3, when yellow green gas overflows from tail gas, liquid phase detection is carried out, benzoin reaction is completed, and the reaction is stopped; s4, after standing, separating liquid to obtain a lower-layer water phase and an upper-layer organic phase; wherein the lower-layer water phase is an aqueous solution rich in ferric ions, and the upper-layer organic phase is the product benzil. According to the embodiment of the invention, at least the metabolite of the ferric ions, namely the ferrous ions, is changed into the ferric ions which can be recycled.

The application provides an ink, which comprises the following components in percentage by weight: solid material, 15-60%; UV curing resin, 25-50%; dual curing resin, 1-15%; monomer, 0-3%; composite photoinitiator, 5-12%; auxiliary agent, 1-4%; the solid material is anti-counterfeiting material, pigment and filler; the UV curing resin is a mixture of one or more than one of UV resins with absorption peaks matching the absorption spectrum of the composite photoinitiator; the dual curing resin is alicyclic epoxy acrylic resin with dual curing functional groups; the monomer is a mixture of one or more than one of trimethylolpropane triacrylate, tripropylene glycol diacrylate and ethoxypropyl ethylate; the composite photoinitiator is a mixture of one or more than one of acyl phosphine oxide, alpha-hydroxy ketone derivative, alpha-amino ketone derivative, benzoin and derivatives thereof, triaryl sulfonium salt and the like; and the auxiliary agent is a pigment wetting and dispersing auxiliary agent or a substrate wetting auxiliary agent.

The present application belongs to the technical field of organic synthesis, and particularly relates to a method for synthesizing benzil or its derivative from green oxidation of benzoin or its derivative. A complex compound is prepared from ethylenediaminetetraacetic acid disodium salt and a metal salt as a catalyst, then benzoin or its derivative and the catalyst are added into a reaction container, ethanol and TBAB are added, H2O2 is added dropwise, and the reaction is heated by magnetic stirring oil bath, so that benzoin or its derivative is oxidized into benzil or its derivative, the purity of the product is greater than or equal to 97%, the selectivity is 95%, and the yield is as high as 90.5%. The method has the advantages of strong reaction selectivity, high yield, good color of product, high purity, mild reaction condition, few by-products, simple post-treatment, green and non-toxic substances of solvent and oxidant, and repeated use of the catalyst, and the reaction not only meets the requirements of green chemistry, but also has important significance for energy saving and emission reduction.

The present invention relates to a process for preparing 5,6,5',6'-tetraphenyl-3,3'-(1,4-phenylene)-bis[1,2,4]triazine comprising: a) reacting benzil with terephthalamidrazone in a solvent consisting of 2-methyltetrahydrofuran to form a suspension of 5,6,5',6'-tetraphenyl-3,3'-(1,4-phenylene)-bis[1,2,4]triazine in a reaction medium, then b) separating the 5,6,5',6'-tetraphenyl-3,3'-(1,4-phenylene)-bis[1,2,4]triazine from the reaction medium obtained in step a), then c) washing the 5,6,5',6'-tetraphenyl-3,3'-(1,4-phenylene)-bis[1,2,4]triazine obtained in step b) at least once, characterized in that the implementation of washing step c) does not involve diethyl ether.

This invention relates to a ligand compound containing a benzylamide group, a metal complex, a metal-supported catalyst, and their applications, belonging to the field of catalytic olefin polymerization and synthesis of high-molecular-weight polyolefins. The ligand compound has the structural formula shown in Formula I, wherein R2, R3, R4, and R5 are independently selected from C1 to C5. 10 The alkyl group, substituted or unsubstituted diphenylmethyl group, and hydrogen are all selected from the group; R1 and R6 are simultaneously selected from the group consisting of methoxy, hydroxyl, and sodium oxyalkylene substituents; when there are substituents on the diphenylmethyl group, the substituents are selected from hydroxyl, C1 to C6. 10 Alkyl groups, C1-C 10 alkoxy groups, C2-C 10 Any of the alkenyl groups. This invention links the R1 and R6 groups to the benzene-2,000 skeleton, so that during subsequent loading, the R1 and R6 groups can form strong hydrogen bond interactions with the hydrogen atoms on the support. Combined with the steric hindrance effect regulated by the benzene-2,000 skeleton, the subsequently prepared metal-supported catalyst has better catalytic performance.

This invention discloses a method for preparing and applying a synergistically modified polyethersulfone (PESU) composite dielectric film using physical and chemical methods, relating to the fields of polymer materials and energy storage. The purpose of this invention is to address the problems in existing technologies, such as easy agglomeration of inorganic nanofillers, poor interfacial compatibility with the polymer matrix, and loose structure and insufficient high-temperature performance of pure blended matrices. This invention uses polycarbonate, polyethersulfone resin, and benzoyl as raw materials. By introducing an ultraviolet (UV) irradiation process, the photoinitiating properties of benzoyl induce a photocrosslinking reaction between polycarbonate and polyethersulfone resin, constructing a three-dimensional molecular network. This invention, through the combination of UV irradiation treatment and benzoyl and polycarbonate doping, significantly improves the energy storage characteristics of the PESU dielectric film. Under UV irradiation, benzoyl enhances the mechanical strength and structural stability of the film through a "photolysis-active initiation-crosslinking" reaction, improving the dispersion and interfacial bonding effect of PC in the matrix, leading to its application in capacitors, converter valves, and inverters.

The application discloses a fused heterocyclic polymer containing a biisoquinoline structure and a preparation method and application thereof, and relates to the technical field of fused heterocyclic polymer preparation. The preparation method comprises the following steps: adding an internal alkyne monomer, a benzoin monomer, an ammonium salt, a rhodium catalyst, an acid and an oxidant into a solvent, and obtaining the fused heterocyclic polymer containing the biisoquinoline structure after reaction; the structural general formula of the internal alkyne monomer is as follows: the structural general formula of the benzoin monomer is as follows: the structural general formula of the fused heterocyclic polymer is as follows: R1 and R2 are independently aryl, aryl derivatives, unsubstituted alkyl or substituted alkyl; R3 and R4 are independently aryl, aryl derivatives, aliphatic groups, hydrogen atoms, halogen atoms, nitro groups, cyano groups or bioactive fragments; and x, y and z are independently integers between 1 and 200. The preparation method is simple and efficient, the target product can be obtained through only one step of reaction, the yield is high, and the raw materials used are cheap.