998 results about "Chlorobenzene" patented technology

The invention relates to the technical field of organic synthesis, and discloses a preparation method of bromo-pyrrole nitrile. The method comprises the following steps: (1) mixing p-chlorophenylglycine, acetonitrile, trifluoroacetic acid and a catalyst, then dropwise adding acyl chloride and carrying out acylation reaction, and after the reaction is completed, purging with an inert gas; (2) under the inert gas, mixing the mixture obtained in the step (1) with inorganic salt, then dropwise adding 2-chloroacrylonitrile, carrying out cyclization reaction, and separating a liquid phase from the obtained mixture; and (3) under the inert gas, mixing the liquid phase obtained in the step (2), hydrobromic acid and hydrogen peroxide, carrying out a bromination reaction, then extracting with acetonitrile to obtain an acetonitrile layer, then removing the acetonitrile, and then carrying out cooling crystallization to obtain the bromo-pyrrolenitrile. According to the technical scheme, the reaction yield is high, different solvents do not need to be frequently replaced, and the solvents can be recycled.

The invention belongs to the technical field of organic pollution treatment, and relates to a biochar-LDH-nZVI-GO composite material for organic pollution remediation and a preparation method and application thereof.The preparation method comprises the steps that graphene oxide is ultrasonically dispersed in deionized water, magnesium salt and aluminum salt are added to form uniform suspension liquid, then the uniform suspension liquid is mixed with biochar suspension liquid, and the biochar-nZVI-GO composite material is obtained; carrying out pH (Potential of Hydrogen) regulation and a hydrothermal crystallization reaction, so as to prepare a biochar-Mg / Al-LDH-GO compound; and dispersing the compound in an organic solvent, sequentially adding FeSO4. 7H2O and a NaBH4 solution in an inert atmosphere to carry out a reduction reaction, and finally washing and drying to obtain the biochar-LDH-nZVI-GO composite material. The material shows high-efficiency removal capacity on various organic pollutants such as trichloroethylene, chlorobenzene and polychlorinated biphenyl, is suitable for high-efficiency green remediation of organic pollutants in soil and water, and has good popularization and application prospects.

The invention discloses a chlorobenzene wastewater continuous stripping purification recovery device and an implementation method, the chlorobenzene wastewater continuous stripping purification recovery device comprises an aeration tank, an alkali water washing system, an acid water washing system, an acid-base neutralization system and a ferric hydroxide separation system, the aeration tank is connected with the alkali water washing system, the acid water washing system is connected with the alkali water washing system, and the acid water washing system is connected with the ferric hydroxide separation system. The acid-base neutralization system is connected with the alkali-water washing system, the acid-water washing system and the ferric hydroxide separation system, and the alkali-water washing system and the acid-water washing system are both in two-stage steam stripping, and have the following advantages: alkali washing water and acid washing water generated in the chlorobenzene production process are subjected to two-stage nitrogen steam stripping, so that the content of organic matters is greatly reduced; ferric hydroxide is generated through neutralization of acid-alkali wastewater, the total amount of the wastewater is reduced, then the ferric hydroxide reacts with hydrochloric acid in the pickling water to generate ferric trichloride, hydrochloric acid is neutralized, the neutralization product ferric hydroxide is consumed, the wastewater amount is reduced, and recycling of wastewater resources is achieved.

The invention provides a polyolefin elastomer for a photovoltaic packaging film as well as a preparation method and application of the polyolefin elastomer, the polyolefin elastomer is a random or block polymer composed of ethylene and alpha-olefin, the molecular weight Mw of the polyolefin elastomer is 40000-100000, the PDI is 2.3-3, the monomer insertion rate is 20-40 wt%, in TGIC trichlorobenzene heating leaching, the elution peak of polyolefin resin is double peaks, and the molecular weight Mw of the polyolefin elastomer is 25000-25000, the PDI of the polyolefin elastomer is 2.3-3, and the monomer insertion rate of the polyolefin elastomer is 20-40 wt%. The temperature difference between two peaks is 35-50 DEG C, the half-peak width of the peak appearing at the position larger than 40 DEG C is 20-28, the elastomer has high light transmittance and additive absorption capacity, and the prepared composition photovoltaic packaging adhesive film has more excellent optical performance.

The invention discloses a cellulose derivative doped perovskite active layer, a preparation method thereof and a perovskite solar cell, and relates to the technical field of solar cells, and the preparation method comprises the steps: dissolving PbI2, PbBr2, CsI, MABr, FAI and MACl in a solvent to obtain a mixed solution; adding HPMCP into the mixed solution to obtain a perovskite precursor solution; and in a protective gas atmosphere, spin-coating the perovskite precursor solution on a substrate, dropwise adding chlorobenzene in the spin-coating process, and heating the substrate after spin-coating to obtain the perovskite active layer. The method has the beneficial effects that the leakage of lead in perovskite is effectively inhibited by utilizing the physical wrapping effect of HPMCP and the strong coordinate bond effect and hydrogen bond effect of perovskite, the quality of a perovskite active layer thin film can be improved, grain boundary defects are effectively passivated, ion migration is inhibited, and good optical performance is achieved; the photoelectric conversion efficiency and the environmental stability of the halogen hybrid perovskite solar cell device are effectively improved.

The invention relates to the technical field of all-solid-state batteries, in particular to air-stable argyrodite type sulfide electrolyte, a preparation method thereof and an all-solid-state battery. The air-stable argyrodite type sulfide electrolyte provided by the invention comprises a sulfide solid electrolyte and a protective layer formed by self-assembly of organic molecules on the surface of the sulfide solid electrolyte, wherein the sulfide solid electrolyte is argyrodite type sulfide solid electrolyte, the general formula of the sulfide solid electrolyte is Li < 7-a > PS < 6-a > X , X is halogen, and a is more than 0 and less than 2; the organic molecule is at least one of 1-methoxyhexane, 2-heptanone, 3-chloropropanol, 4-chlorobenzyl mercaptan, n-amylamine, 5-chloromethyl-1, 3-benzodioxole, chlorophenylmethane and ethylbenzene, and the organic molecule is at least one of 1-methoxyhexane, 2-heptanone, 3-chloropropanol, 4-chlorobenzyl mercaptan, n-amylamine, 5-chloromethyl-1, 3-benzodioxole, chlorophenylmethane and ethylbenzene. According to the air-stable argyrodite type sulfide electrolyte provided by the invention, the stability of the sulfide electrolyte to water can be enhanced, and the ionic conductivity of the sulfide electrolyte can be ensured.

The invention discloses weather-resistant unsaturated polyester resin as well as a preparation method and photovoltaic application thereof, and relates to the technical field of high polymer materials. When the weather-resistant unsaturated polyester resin is prepared, 1, 6-hexanediol, itaconic acid and an ultraviolet absorption monomer are subjected to esterification and polycondensation to prepare unsaturated polyester; the preparation method comprises the following steps: carrying out reaction on naringenin and 4-isocyanate-tetramethylpiperidine oxide to prepare a functional cross-linking agent; the preparation method comprises the following steps: reacting 3-(4-chlorphenyl) phosphine, 2, 2 '-thiobis (4-chlorophenol) and 2-butene-1, 4-diamine, and polymerizing and coating silicon dioxide to prepare pre-modified silicon dioxide; reacting the pre-modified silicon dioxide, n-butylamine and nickel acetate to obtain modified silicon dioxide; uniformly mixing unsaturated polyester, a functional cross-linking agent and modified silicon dioxide, and performing injection molding to obtain the weather-resistant unsaturated polyester resin. The weather-resistant unsaturated polyester resin prepared by the invention has excellent anti-aging, flame-retardant, self-repairing and mechanical properties.

There is provided an alkali metal salt of 4-chloro-N-[2-[(4-chlorophenyl)methyl]-3-oxo-1,2,4-thiadiazol-5-yl]benzamide and formulations thereof. This salt finds particular utility in the treatment or prevention of a disorder or condition ameliorated by the activation of AMPK.

The invention provides a preparation method of a bexagliflozin intermediate, and relates to the technical field of organic synthesis. The preparation method provided by the invention comprises the following steps: S1, substitution reaction: under the action of alkali, carrying out substitution reaction on 2-(cyclopropoxy) ethanol and a compound III ((5-halogen-2-chlorphenyl) (4-halophenyl) ketone) to generate a compound II; s2, reduction reaction: under the action of lewis acid, carrying out reduction reaction on a reducing agent and a compound II ((5-halogen-2-chlorphenyl) (4-(2-(cyclopropoxy) ethyoxyl) phenyl) ketone) to generate a compound I; the method has the advantages of mild reaction conditions, high atom utilization rate, high yield, high product quality and the like.

The invention is applicable to the technical field of chemical purification, and provides a method for preparing p-chlorobenzonitrile by static melt crystallization, which comprises the following steps: melting a p-chlorobenzonitrile crude product from a rectification system into a liquid, and adding the liquid into a layered melt crystallizer for cooling crystallization treatment; carrying out heating sweating treatment on crystals obtained by cooling crystallization treatment, returning obtained sweating liquid and non-crystallized mother liquor to a rectification system for purification, and then adding the obtained sweating liquid and non-crystallized mother liquor into the melt crystallizer again for purification treatment; according to the cooling crystallization treatment procedure, the cooling rate is 1-3 DEG C / h, the cooling end point is 83-86 DEG C, and heat preservation is conducted for 1-1.5 h; the heating sweating treatment procedure is as follows: the heating rate is 0.5-3 DEG C / h, the temperature is increased to 91-93 DEG C, and the constant temperature is kept for 0.5-1 h. The method has the advantages of no need of additional addition of a solvent, no treatment of three wastes, high recovery rate and high product purity, is a green separation and purification process, and has the advantages of simple process, mild operation temperature, simple purification operation, low risk and high production safety coefficient.

The invention belongs to the technical field of sulfonamide synthesis, and particularly relates to a green and environment-friendly sulfonamide amidation preparation method. Comprising the following steps: adding chlorosulfonic acid into a reactor, stirring, heating, adding o-nitrochlorobenzene, carrying out staged heat preservation, cooling, and adding thionyl chloride to obtain 2-nitro-4-chlorine sulfonate-chlorobenzene; the method comprises the following steps: separating and filtering 2-nitro-4-chlorine sulfonate-chlorobenzene, adding ammonia water, stirring, preserving heat, and carrying out filter pressing to obtain 2-nitro-4-amine sulfonate-chlorobenzene; the preparation method comprises the following steps: adding liquid caustic soda into 2-nitro-4-amine sulfonate-chlorobenzene, stirring, heating, and adjusting the pH value to obtain 2-nitro-4-amine sulfonate-phenol; the method comprises the following steps: adding water, a catalyst and hydrazine hydrate into 2-nitro-4-amine sulfonate-phenol, heating, stirring, and carrying out filter pressing to obtain 4-sulfonamide-2-amino-phenol. According to the preparation method of sulfonamide, generated tail gas is subjected to falling film absorption treatment, and the product prepared by the preparation method is high in purity.

The invention provides a resveratrol preparation method, which comprises: mixing a compound 1 and an acylation reagent in an organic solvent, carrying out a reaction to obtain a compound 2, adding chlorobenzene and a catalyst, and carrying out a Friedel-Crafts reaction on the compound 2 and chlorobenzene under the ultraviolet light condition to obtain a compound 3, oxidizing the compound 3 to obtain 1-(4-phenol)-2-(3, 5-dihydroxyphenyl) ethanone; the preparation method comprises the following steps: reducing 1-(4-phenol)-2-(3, 5-dihydroxyphenyl) ethanone to obtain 1-(4-phenol)-2-(3, 5-dihydroxyphenyl) ethanol; and removing an alcoholic hydroxyl group in the 1-(4-phenol)-2-(3, 5-dihydroxyphenyl) ethanol to obtain the resveratrol.

The invention provides a method for producing 4, 4 '-dichlorodiphenyl sulfone by continuous reaction of a microchannel reactor, which comprises the following steps: uniformly mixing thionyl chloride and aluminum chloride to obtain a solution A; uniformly mixing hydrogen peroxide and glacial acetic acid to obtain a solution B; a first feeding pump and a second feeding pump are adopted for conveying chlorobenzene and a solution A into a first silicon carbide micro-channel reactor for reaction, an outlet of the reactor is connected with a gas-liquid separator, through separation, a gas phase is used for preparing a byproduct hydrochloric acid, and a liquid phase is a chlorobenzene solution of 4, 4 '-dichlorodiphenyl sulfoxide; and continuously conveying the chlorobenzene solution of 4, 4 '-dichlorodiphenyl sulfoxide to the second silicon carbide microchannel reactor by adopting a third feeding pump, and meanwhile, conveying the solution B to the second silicon carbide microchannel reactor by adopting a fourth feeding pump for reaction to prepare 4, 4'-dichlorodiphenyl sulfone. Compared with the prior art, the micro-channel reactor is used for continuous production, the mass and heat transfer effect is good, impurity generation is effectively inhibited, and the reaction time is shortened.

The invention provides a copolymer oil-displacing agent containing a modified polyether amine macromonomer and a preparation method thereof, and belongs to the field of oilfield chemistry, the preparation method comprises the following steps: adding p-chlorobenzaldehyde and polyether monoamine which are equimolar into ethanol, stirring at room temperature, and carrying out Schiff base reaction to obtain an intermediate product solution; adding N-(3-dimethylaminopropyl) methacrylamide of which the mole is equal to that of p-chlorobenzaldehyde into the intermediate product solution, carrying out quaternization reaction, and carrying out rotary evaporation on ethanol to remove the ethanol, so as to obtain a modified polyether amine macromonomer; and polymerizing the modified polyether amine macromonomer and acrylamide, and crushing, hydrolyzing and drying a polymerization product to obtain the hydrophobic modified polyacrylamide containing the polyether amine structural unit. The oil-displacing agent has good temperature resistance and salt resistance, and can be used for preparing a polymer solution by taking seawater as a solvent.

The invention relates to a synthesis process of p-chlorophenylboronic acid, which comprises the following steps: by taking tetrahydrofuran as a solvent and p-dichlorobenzene as an initial raw material, firstly preparing p-chlorophenylmagnesium chloride through Grignard reaction, then reacting the p-chlorophenylmagnesium chloride with boric acid ester in a microchannel reactor to obtain a p-chlorophenylboronic acid ester crude product, and then hydrolyzing, layering and carrying out oil-phase azeotropic distillation to obtain the p-chlorophenylboronic acid ester. And finally, recrystallizing by adopting a mixed system of an alcohol solvent and a benzene solvent to obtain p-chlorophenylboronic acid with the content of 98% or above. The synthetic process of the p-chlorophenylboronic acid is mild in reaction condition, simple and convenient to operate, low in cost, high in safety, high in product content and very suitable for being applied to industrial large-scale production.

The invention belongs to the technical field of optical drive catalytic materials, and discloses a preparation method of a foamed ceramic-metal organic framework composite catalytic material and application of the foamed ceramic-metal organic framework composite catalytic material in photo-thermal catalytic elimination of nitro compounds. According to the invention, photo-thermal catalytic MOFs are loaded on foamed ceramic, and a floatable integrated photocatalytic material is formed through in-situ self-assembly and is used for solar-driven nitro-compound thermal elimination. MOFs have high specific surface area, high porosity, good light absorption and high photo-thermal conversion efficiency; the foamed ceramic has the characteristics of strong adsorbability, good heat conduction, light weight, adjustable size and the like. The combination of the two overcomes the problems of difficult recovery, more residues and low efficiency of the traditional powder catalyst and the high cost, high energy consumption, high-temperature danger and the like of the traditional photo-thermal catalysis, and shows huge application potential. The method can be used for treating organic wastewater containing toxic nitro compounds (such as trinitrotoluene, dinitrobenzene, nitrochlorobenzene and the like), and a new thought is provided for wastewater treatment in the fields of explosives, medicines, pesticides, dyes and the like.

The invention relates to the field of material chemistry on-line detection, in particular to a 1, 2, 4-trichlorobenzene on-line detection material and a preparation method thereof, and provides a film-forming sensitive layer material capable of being coated on the surface of a transducer, and the film-forming sensitive layer material comprises chitosan, a crosslinking component with the content of 0.1-5wt% in terms of glutaraldehyde and magnetic core-shell molecularly imprinted particles after being dried, the magnetic core-shell molecularly imprinted particle contains a ferroferric oxide magnetic inner core, a silicon dioxide middle layer and a molecularly imprinted polymer shell layer, and the shell layer is a cyclodextrin methacrylate and ethylene glycol dimethacrylate copolymer network and takes 1, 2, 4-trichlorobenzene as a template. The material keeps the membrane integrity and long-term stability under the working conditions of circulation and regeneration and also gives consideration to quick response, and the residual 1, 2, 4-trichlorobenzene is controlled to be not greater than 0.10 wt% and the residual glutaraldehyde is controlled to be not greater than 0.5 wt%. The method is used for relieving structural mass transfer contradiction and processing and coating coupling contradiction caused by high filler load, and has online detection application value.

The invention discloses a synthesis method of 2, 4, 5-trifluorophenylacetic acid, which comprises the following steps: by taking cheap and easily available o-chloronitrobenzene as a raw material, reacting with sodium nitrate in a sulfuric acid and trifluoroacetic acid system, separating generated 2, 4-dinitrochlorobenzene through melt crystallization, and continuing to synthesize 2, 4-dinitrochlorobenzene in methyl chloroacetate to obtain 2, 4, 5-trifluorophenylacetic acid. The method comprises the following steps: carrying out indirect aromatic nucleophilic substitution reaction on 2, 4-dinitrophenylacetic acid under the condition of sodium hydride to generate 5-chloro-2, 4-dinitrophenylacetic acid methyl ester, separating, carrying out fluorination reaction on the 5-chloro-2, 4-dinitrophenylacetic acid methyl ester and potassium fluoride under the action of a phase transfer catalyst, carrying out rectification separation to obtain 2, 4, 5-trifluorophenylacetic acid, and carrying out hydrolytic acidification on the 2, 4, 5-trifluorophenylacetic acid in a sodium hydroxide aqueous solution to obtain 2, 4, 5-trifluorophenylacetic acid. And the process route is safer, more environment-friendly, more efficient and lower in cost.

The invention relates to the technical field of pharmaceutical analysis, and particularly discloses a method for detecting related substances of 4-chlorobenzoyl chloride. According to the method, a chromatographic column with 50% of phenyl and 50% of methylpolysiloxane as a stationary liquid is adopted to perform gas chromatographic analysis on a 4-chlorobenzoyl chloride sample, and accurate detection of four related substances, namely methyl parachlorobenzoate, ethyl parachlorobenzoate, o-chlorobenzoyl chloride and m-chlorobenzoyl chloride, in the 4-chlorobenzoyl chloride and the content of the four related substances is realized at the same time. The detection method is high in specificity, low in detection limit and quantitation limit, good in linear relation, high in recovery rate, good in repeatability, good in stability, good in durability, easy and rapid to operate, low in detection cost and accurate and reliable in detection result, and guarantees are provided for monitoring the quality stability and clinical medication safety of rebamipide.

The invention discloses polyolefin artificial leather, a preparation method thereof and an automobile seat, and belongs to the technical field of polyolefin artificial leather. The polyolefin artificial leather comprises a base cloth layer, a high-elasticity and high-softness layer and a coating layer which are sequentially stacked, the high-elasticity and high-softness layer comprises the following raw material components: a polyolefin elastomer, a low-density polyolefin elastomer, modified high-elasticity resin, an assistant crosslinker, a coupling agent and an anti-aging agent; the low-density polyolefin elastomer comprises a modified polyolefin elastomer, inorganic microspheres and a silane coupling agent; the modified polyolefin elastomer is prepared by grafting 4-vinyl-1, 2-phthalic acid and maleic anhydride on a polyolefin elastomer by adopting a melt grafting method; the modified high-elasticity resin comprises a high-elasticity polyolefin elastomer, a rubber elastomer, a silane coupling agent and a peroxide cross-linking agent; the high-elasticity polyolefin elastomer is obtained by copolymerization of propylene, norbornene and cardanol; p-chlorophenyl trimethoxy silane is at least adopted as the coupling agent.

The present application relates to the field of cosmetic technology, in particular to a quick-drying and shaping spray and a preparation method thereof, in particular to a hair styling product which is quickly dried, permanently shaped and has hair care effect through the synergistic effect of specific film-forming agents and volatile systems, comprising the following components: ethanol 30-50%, aminomethyl propanol 0.1-1%, butanediol 1-5%, octyl acrylamide / acrylate / methyl acrylate copolymer 5-15%, PEG-12 dimethicone 0.5-2%, keratin 0.1-2%, hydrolyzed keratin 0.1-2%, oxidized keratin 0.1-2%, aloe barbadensis leaf extract 0.5-3%, selaginella kurata extract 0.5-3%, radix falatoniae extract 0.5-3%, radix salviae miltiorrhizae extract 0.5-3%, water 20-40%, essence 0.1-2%, cetrimonium chloride 0.1-1%, phenoxyethanol 0.5-1.5%, propylene glycol 1-5%, p-hydroxyacetophenone 0.5-1.5%, chlorphenesin 0.1-0.5%, ethylhexylglycerin 0.5-1.5%.

The invention relates to the field of catalysts, in particular to a modification method of a molecular sieve catalyst and application of the molecular sieve catalyst in polychlorobenzene isomerization, and the modification method of the molecular sieve catalyst comprises the following steps: (1) carrying out dealumination on the molecular sieve catalyst, and then carrying out first washing and drying treatment; (2) dispersing the catalyst obtained in the step (1) in a metal salt aqueous solution, adding an alkali solution to adjust the pH value of the system to 8-11 for aging, and then carrying out second washing and drying treatment, the mass ratio of the metal salt to the catalyst to water being (0.01-0.15): 1: (4-40), and the mass of the metal salt being metered by the metal amount; (3) dipping the catalyst obtained in the step (2) in an organic sulfonic acid or salt solution thereof, separating, and then carrying out third washing and drying treatment; and (4) roasting the catalyst obtained in the step (3) to obtain the modified molecular sieve catalyst.

According to the dioxin closed-loop control method based on real-time detection and dynamic optimization, an online monitoring system is deployed, a tunable laser ionization time-of-flight mass spectrometer is arranged at an incineration flue gas discharge outlet to detect the concentration of trichlorobenzene serving as a dioxin indicator in real time, and a sensor is combined to detect working condition parameters; polynomial regression is used for real-time conversion of dioxin toxicity equivalent concentration, and an on-line monitoring-toxicity evaluation integrated system is formed. And a double-layer random forest-eagle mixed optimization model is constructed, the first layer is based on historical working condition data to train a random forest model to predict the dioxin emission trend and the potential standard exceeding risk, and the second layer is used for dynamically optimizing the incineration parameter combination through an improved eagle optimization algorithm and issuing the incineration parameter combination to an incineration system in real time. And meanwhile, a calcium-based retardant directional spraying device is deployed in a flue gas purification section, so that uniform covering and accurate dosage control of the retardant are realized, and the low-temperature resynthesis reaction of dioxin is inhibited. And finally, parameters of the double-layer optimization model are dynamically updated based on the error of an actual detection value and a predicted value, the adaptability of the model to working condition fluctuation is improved, therefore, dioxin emission is effectively reduced, and the environmental protection property and stability of the incineration process are improved.

The invention belongs to the technical field of chemical synthesis, and relates to a method for continuously synthesizing 4-bromo-2-p-chlorophenyl-5-trifluoromethyl pyrrole-3-nitrile by a microchannel reactor, which comprises the following steps: pumping a substrate solution to a first plate type micro-reaction module; respectively pumping the bromination reagent solution to a first plate type micro-reaction module, a second plate type micro-reaction module and a third plate type micro-reaction module to obtain a reaction base solution; the reaction base solution is introduced into a fourth plate type micro-reaction module, n-heptane is pumped to the fourth plate type micro-reaction module and a fifth plate type micro-reaction module, deionized water is pumped to the fourth plate type micro-reaction module and the fifth plate type micro-reaction module, and extract liquor is obtained; and carrying out separation, evaporation recovery and recrystallization to obtain a finished product. Through the multi-stage series design of the micro-channel reactor, catalytic bromination replaces traditional bromine oxidation and reaction-extraction in-situ integration, and the three major problems of low efficiency, serious pollution and poor safety of an intermittent process are solved.

To provide an ophthalmic product in which an ophthalmic composition is filled in a container in which a pressing deformation part is formed by using an elastic material, and although the ophthalmic composition contains chlorpheniramine, diphenhydramine or a salt thereof, adsorption of these components is suppressed.SOLUTION: An ophthalmic product comprising an ophthalmic composition and a container filled with the ophthalmic composition, wherein the container comprises a container body having a discharge port and a press-deforming part, and a cap, and the press-deforming part is formed using an elastic material, (A) one or more selected from the group consisting of chlorpheniramine, diphenhydramine, and pharmaceutically acceptable salts thereof, and (B) one or more selected from the group consisting of an amino acid and a salt thereof, glycyrrhizic acid and a salt thereof, a mucopolysaccharide and a salt thereof, trometamol and a salt thereof, ethylenediaminetetraacetic acid and a salt thereof, and a vitamin and a derivative thereof.SELECTED DRAWING: Figure 1

The invention relates to the technical field of chemical chlorination kettles, in particular to a chemical tetrachlorophthalic anhydride production and processing chlorination kettle which comprises a chlorination kettle body, a sealed iodizing mechanism, a precise discharging mechanism and a sealing mechanism, the outer wall of the chlorination kettle body is communicated with a material passing pipe, and the outer wall of the top of the material passing pipe is communicated with a second iodizing valve; the outer wall of the top of the second iodizing valve is communicated with a capacity-increasing short pipe, and the outer wall of the top of the capacity-increasing short pipe is communicated with a first iodizing valve. According to the iodine adding device, one-time iodine adding can be achieved through the sealing iodine adding mechanism, meanwhile, a port of a material passing pipe is sealed, a pressing disc is pulled through an accurate discharging mechanism, iodine adhering to the inner wall of the material passing pipe can be shaken off into a temporary storage barrel before iodine adding, and after iodine adding, a beating plate is in an open state and collides with a resonance plate; the iodine in the temporary storage barrel is further promoted to fall into the chlorination kettle body, and the linkage encryption mechanism can seal the temporary storage barrel and the material passing pipe during iodine adding.

The photochemical dehydrogenation ring-closing reaction of the o-chlorobenzene compound is used for photoetching for the first time, the o-chlorobenzene compound is subjected to the dehydrogenation ring-closing reaction under illumination (after energy radiation such as light beams, electron beams, ion beams or X-rays), the solubility of a system is changed, then corresponding patterns are transferred to a substrate through developing and etching processes, and photoetching is achieved. Besides, the monomolecular resin of the compound has a determined multi-aromatic-ring molecular structure, is single in molecular size, and can well meet the requirement of high-resolution photoetching. According to the monomolecular resin based on the dehydrogenation ring closing reaction, a multi-aromatic ring structure is introduced into photoresist, and the etching resistance of the photoresist can be effectively improved through introduction of multi-aromatic rings.

The present invention relates to the technical field of polymer synthesis, and provides a carbon dioxide-based polycarbonate diol refining method, which comprises: S1, mixing carbon dioxide-based polycarbonate diol, an extraction agent and water, and washing to obtain a glue liquid; s2, the glue liquid is subjected to flash evaporation and devolatilization, and a carbon dioxide-based polycarbonate diol refined product is obtained; the extracting agent comprises methylbenzene or a mixture of one of methylbenzene, chlorobenzene and ethyl acetate and dichloroethane. According to the technical scheme, the problem of low yield of polycarbonate diol prepared in related technologies is solved.

The invention belongs to the technical field of insecticides, and particularly relates to a synthetic method of a hexythiazox intermediate, which comprises the following four steps: S1, preparing erythro-1-p-chlorophenyl-2-amino-1-bromo-propane; s2, preparation of the erythro-1-p-chlorophenyl-2-aminopropanethiol, and preparation of the erythro-1-p-chlorophenyl-2-aminopropanethiol; s3, preparation of the trans-1-p-chlorophenyl-2-amino-propyl-O-isopropyl thiocarbonate hydrochloride, and preparation of the trans-1-p-chlorophenyl-2-amino-propyl-O-isopropyl thiocarbonate hydrochloride; and S4, preparation of a hexythiazox intermediate, namely, trans-5-(4-chlorphenyl)-4-methyl thiazolidone. According to the invention, the use of highly toxic carbon disulfide, corrosive chlorosulfonic acid, carcinogenic benzyl chloride and other high-risk reagents is completely abandoned, the operation risk is reduced, no malodorous gas is discharged, the occupational health and safety of operators and the environment are fundamentally guaranteed, meanwhile, the generation of acidic wastewater and sulfur-containing hazardous waste is solved, and the production cost is reduced. And a green chemical atom economy principle is met.

The invention discloses a preparation method of a modified red-mud-based chlorobenzene catalyst, which comprises the following steps: taking solid waste red mud as a main component, adding a certain amount of acid for dissolving, dropwise adding alkali liquor to enable the pH value of red mud suspension to reach 8-9, washing to be neutral, drying, grinding, passing through a molecular sieve, and roasting to obtain red-mud-based catalyst carrier powder; the red-mud-based catalyst carrier powder is mixed with a nitrate solution, it is guaranteed that the active component loading content in the mixed solution is 10-20%, and a filter cake loaded with the active component is roasted and then ground to obtain the red-mud-based catalyst. According to the method, the solid waste red mud is subjected to resource utilization, the red mud is modified into the efficient and low-cost catalyst to be applied to catalytic oxidation of volatile organic compounds, volatile organic compound waste gas is eliminated, the atmospheric environment quality is improved, waste is turned into wealth, and pollution is treated with waste.