14 results about "Dichloroaniline" patented technology

The application relates to the preparation field of quinoline compounds and discloses a method for preparing a quinoline compound shown in formula (I), which comprises the following steps: in the presence of inert high-boiling-point polyether solvents, substituting a compound shown in formula (III) with 3,5-dichloroaniline to obtain a compound shown in formula (II), and then performing ring closure reaction to obtain the compound shown in formula (I), wherein X1, X3, X4, X5 and X6 are each independently -CN or -COOR'; R' is C1-C4 alkyl; wherein X1 is same as at least one of X3, X4, X5 and X6; X3 and X4 are same or different, X5 and X6 are same or different; X2 is a hydroxyl group or an amino group; R1 and R2 are each independently hydrogen or C1-C4 alkyl; and R1 and R2 are same or different. The method has the advantages of low reaction temperature, low cost and high yield, and is beneficial to industrialization.

The invention discloses a method for preparing 3, 5-dichloroaniline through continuous catalytic reduction. The method comprises the following steps: dissolving 3, 5-dichloronitrobenzene serving as a raw material in a water-alcohol mixed solvent, adding sodium taurate or sodium glycinate serving as an organic salt stabilizer, adjusting the pH value to 3.5-4.5, and feeding into a partitioned temperature tubular reactor; under the hydrogen atmosphere, under the action of a Pd / C-FeO bi-component catalyst, selective reduction is performed at the front section of 70-90 DEG C, and conversion is completed at the rear section of 100-120 DEG C; and after the outlet of the reactor is cooled to 40-60 DEG C, sequentially injecting a weakly acidic neutralizing solution and a trapping agent at an interval of 0.1-0.5 second so as to passivate and complex the intermediate and reduce the generation of byproducts. The product is subjected to flash evaporation and membrane separation to obtain 3, 5-dichloroaniline with the purity being greater than or equal to 99%, and the solvent, the stabilizer and the hydrogen can be recycled. According to the method, the polar microenvironment is constructed through the stabilizer, the selectivity and the catalyst stability are remarkably improved through the synergistic effect of zoning temperature control and outlet two-stage delayed injection, and the method is suitable for continuous production.

The invention discloses establishment and application of gobiocypris rarus eye cells, and the gobiocypris rarus eye cells Gbr-eye are constructed by utilizing the eyes of the gobiocypris rarus, and are gobiocypris rarus eye cell lines capable of realizing continuous passage. The culture method of the gobiocypris rarus eye cell line comprises the steps of primary culture, subculture, cryopreservation and recovery. A chemical and environmental water acute toxicity assessment method is established based on the gobiocypris rarus eye cell line, and the method specifically comprises the steps of inoculation of gobiocypris rarus eye cells, exposure of 3, 4-dichloroaniline and environmental water and toxic effect detection of 3, 4-dichloroaniline on the gobiocypris rarus eye cells. According to the establishment method and application of the gobiocypris rarus eye cells, the application of the gobiocypris rarus in toxicity detection of chemicals and environmental water bodies is expanded, and reference is provided for acute toxicity test based on fish cells.

The application provides a preparation method of 3,5-dichloroaniline, and the preparation method comprises the following steps: reacting 1,3,5-trichlorobenzene with a coupling reagent ammonia source in the presence of a copper catalyst, a ligand and a base in an inert solvent to generate 3,5-dichloroaniline. The copper catalyst is adopted, and a suitable ligand and a base are selected, so that the preparation of 3,5-dichloroaniline with low cost, low reaction temperature and high yield is realized.

The application discloses a composite material for simultaneously improving soil acidification and pesticide residue, wherein nano calcium hydroxide is loaded on active carbon as a carrier, and the mass ratio of the active carbon to the nano calcium hydroxide is 1: (0.9-1.5). The composite material is prepared by adding active carbon and sodium hydroxide solution into a calcium chloride solution in sequence under a nitrogen atmosphere, washing and drying the precipitate after the reaction, and the application of the composite material in simultaneously changing the pH value of acidic soil and adsorbing diuron and 3,4-dichloroaniline in the acidic soil. The composite material of the application loads nano calcium hydroxide on active carbon, and by limiting the mass ratio of the active carbon to nano calcium carbonate, the pH value of acidic soil can be effectively improved, and diuron and 3,4-dichloroaniline in the soil can be simultaneously adsorbed, so that the application is simple, and the problems of soil acidification and pesticide residue, two soil pollution problems, are solved.

The invention discloses an alkali polishing additive for silicon wafers. The alkali polishing additive comprises organic amine, a complexing dispersant, inorganic salt and a surfactant. The organic amine is one or more of dichloroaniline, diethanol amine and dimethylamine, and the organic amine is 1-5 parts. The complexing dispersant is one or more of sodium benzoate, sodium alginate and sodium citrate, and the complexing dispersant is 3-8 parts. The inorganic salt is one or more of sodium sulfate, lauryl sodium sulfate, sodium pyrosulfate and sodium tartrate, and the inorganic salt is 1-5 parts. The surfactant is one or more of dodecyl dimethyl betaine, sodium alkyl naphthalene sulfonate and alkyl glycoside, and the amount of the surfactant is 5-8 parts; the additive also comprises deionized water; according to the silicon wafer alkali polishing additive, the organic amine is added, the back polishing effect of the same tower footing is obtained under the condition of low weight loss, the battery efficiency is improved, meanwhile, the additive synthesis device can stir and dissolve all the raw materials evenly, and the alkali polishing additive is obtained.

Disclosed is a perovskite precursor solution for improving stability of a perovskite solar cell. Iodoformamidine and cesium iodide are added into a solvent, and bromomethylamine, lead iodide and 3,4-dichloroaniline are added after stirring to obtain the perovskite precursor solution. The perovskite precursor solution is spin-coated on a substrate, obtaining a perovskite thin film by thermal annealing as a light absorption layer of the solar cell. The perovskite precursor solution prepared by the present invention replaces an existing perovskite layer, the defects in the existing perovskite mineralization technology are solved. The perovskite stability improvement leads lower requirements for the process environment and convenient preparation method, realizes the long-time stable performance in a common environment.

The application discloses a synthesis method of a compound 1-(2,3-dichlorophenyl)piperazine hydrochloride, which takes 2,3-dichloroaniline and bis(2-chloroethyl)amine hydrochloride as raw materials, and obtains 1-(2,3-dichlorophenyl)piperazine hydrochloride through a catalyst catalyzed condensation reaction. The synthesis method is simple, the product can be obtained at a high conversion rate, and the reaction safety is high; the raw material used in the application has a low environmental protection pressure, the reaction condition is mild, the requirement on equipment is low, and the application is suitable for industrial production requirements.

The invention discloses a green preparation method of 3, 5-dichloroaniline based on a pipeline reaction. The method comprises the following steps: dissolving 3, 5-dichloronitrobenzene in a water-alcohol mixed solvent, and adding a stabilizer; feeding the obtained solution into a continuous pipeline reactor, introducing hydrogen into a first-section catalytic zone, and selectively reducing nitro groups by using a Pd / C-Fe2O3 catalyst; ammonia gas is introduced into the second-section catalytic zone, and directional ammoniation is carried out by using a Ni-B catalyst; a neutralizing solution and a sodium lactate trapping agent can be injected between the two sections to stabilize the intermediate; and carrying out flash evaporation and membrane separation treatment on the reaction product, and recycling the solvent, the stabilizer and unreacted gas to obtain the 3, 5-dichloroaniline with the purity of more than or equal to 99%. According to the method, efficient coupling of nitro reduction and ammonification reaction is realized through division and cooperation of Pd / C-Fe2O3 and Ni-B dual catalysts and combination of partitioned temperature control and intermediate stabilization measures, the proportion of by-products is remarkably reduced, the yield and the purity are improved, and the service life of the catalysts is prolonged.

The technical scheme discloses a device for continuously preparing 2,5-dichloroaniline, which comprises a first mixer, a first fixed bed reactor, a first separator, a second mixer, a second fixed bed reactor and a second separator; the first mixer comprises a cover plate, a gland, a mixing head and a mixing shell; the mixing shell is fixed on the first fixed bed reactor and communicates with the inner cavity of the first fixed bed reactor; the inner cavity of the mixing shell is sequentially provided with the gland and the mixing head from top to bottom; the cover plate is fixed above the gland and seals the joint of the cover plate and the mixing shell; the mixing head is internally provided with multiple transverse and longitudinal channels; the longitudinal channels are in communication with the feed inlet of the cover plate; and the transverse channels are in communication with the channels of the mixing shell. The technical scheme can solve the technical problem of how to ensure the safe access of hydrogen and the sealing safety while reducing the cost.

The invention relates to the technical field of yellow pigment processing, in particular to a sun-proof yellow pigment preparation process and a product thereof, and the process comprises the following steps: under the protection of nitrogen, preparing a diazonium solution from polyvinylpyrrolidone, hydrochloric acid, dichloroaniline and sodium nitrite; preparing a coupling solution from sodium hydroxide, phenyl methyl pyrazolone and hexadecyl trimethyl ammonium bromide; mixing the modified titanium dioxide with sodium dodecyl benzene sulfonate, rosin soap and ethylene diamine tetraacetic acid, carrying out four-stage pH regulation and gradient heating, finally adding the modified titanium dioxide, and carrying out heat preservation, filter pressing and drying. On the premise of not changing the traditional azo core reaction, the sun-proof grade of the pigment is improved to 7-8 grade from 4-5 grade through assistant synergy and crystal form regulation and control, and the pigment has high tinting strength, excellent dispersity and batch stability, is suitable for building exterior wall coatings, automobile plastic ornaments and high-end light-color ink, and thoroughly solves the problem of outdoor yellow color fading.

The invention discloses a preparation method of pigment red 2, and belongs to the technical field of pigments. The method comprises the following steps: adding 2, 5-dichloroaniline into hydrochloric acid, and dropwise adding a sodium nitrite solution into a 2, 5-dichloroaniline hydrochloride suspension to obtain a solution A; adding water into a grinding machine, then adding 3-hydroxy-N-phenyl-2-naphthylamide and a surfactant, and grinding to obtain a solution B; adding water and a phase transfer catalyst into a grinding machine, dropwise adding the solution A and the solution B at the same time, and reacting while grinding; after the reaction is finished, heating and preserving heat for a certain time, and finally filtering, washing and drying a product to obtain a pigment red 2 finished product. The method is simple and mild in preparation process, low in wastewater discharge amount, environment-friendly and suitable for large-scale production.

This invention discloses a self-adhesive coating for amorphous silicon steel sheets and its preparation method, belonging to the field of coating preparation technology. First, an epoxy resin is generated by polymerizing epichlorohydrin with 4-aminoquinoline, improving thermal stability and effectively reducing mechanical losses after coating. Then, it is reacted with phloroglucinol to obtain a modified epoxy resin, which exhibits tight inward molecular aggregation, increasing crosslinking density. Next, the ring-opening reaction of ethylene glycol diglycidyl ether with 3,5-dichloroaniline enhances crosslinking properties, followed by a reaction with lacquer resin to improve coating stability. The resulting self-adhesive coating can bond tightly to the iron core, reducing NVH levels, decreasing eddy current losses and iron losses, improving the energy conversion efficiency of the motor, and enhancing hydrophobicity.

The invention relates to an oil exploitation auxiliary agent, in particular to a novel Gemini anionic surfactant as well as a preparation method and application thereof, fatty alcohol-polyoxyethylene ether, 3, 5-dichloroaniline, 1, 3-propane diamine and sodium 2-chloroethane-1-sulfonate are used as raw materials, and the Gemini anionic surfactant containing multiple hydrophilic chain segments and hydrophobic chain segments is synthesized by rigid benzene rings. The anionic surfactant is easy to dissolve in water, has higher surface activity, is small in dosage, and saves the cost in actual use. The oil-based mud flushing agent is formed by the oil-based mud flushing agent, the nonionic surfactant, the cosolvent, the chelating agent and the penetrating agent, all the components cooperate with one another to form the flushing agent with excellent flushing efficiency at high temperature and high salt, and the oil-based mud flushing agent is good in compatibility with cement paste and oil-based mud.