13 results about "Carboxylic acid halides" patented technology

This invention belongs to the field of rainwater treatment technology and relates to a multifunctional bioretention tank for enhanced nitrogen and phosphorus removal. The tank comprises, from top to bottom, a water accumulation layer, a covering layer, a planting layer, a media layer, a submerged layer, and a drainage layer. The drainage layer is equipped with a drainage pipe, the outlet of which is flush with the top of the submerged layer. The submerged layer contains layered modified wood chips and iron filings. The modified wood chips are obtained by grafting functional copolymers onto the wood chips, with the amount of the functional copolymers being 6-10 wt% of the wood chips. The functional copolymers are obtained through copolymerization of pyridine-containing acrylic monomers and double-bonded acyl halide monomers at a molar ratio of 1:(0.1-0.3). This invention, through wood chip modification and improved filling structure, layers modified wood chips and iron filings in the submerged layer of the bioretention tank, thereby enhancing the nitrogen and phosphorus removal effect and significantly improving the removal efficiency of heavy metal pollutants.

A polyester copolymer, a method for preparing the polyester copolymer, an adhesive comprising the polyester copolymer, a skin patch comprising the adhesive, and a medical device comprising the adhesive are disclosed. The polyester copolymer comprises the following reaction products: a first diol and a second diol, wherein the first diol is an oligomer, polymer, or copolymer, and the second diol is a short-chain diol having 2 to 20 carbon atoms; a bifunctional compound comprising a dicarboxylic acid, a dicarboxylic acid halide, an anhydride, or a diester; and a third diol, wherein the third diol comprises a branched hydrocarbon group.

This invention provides a method for preparing 2-alkylthiobenzo[b]thiophene sulfone compounds. Using acylsulfonylmethylthio ylide compounds as raw materials, cyclization in the presence of an acid anhydride or acyl halide is induced to achieve the preparation of 2-alkylthiobenzo[b]thiophene sulfone compounds. This preparation method uses readily available and simple raw materials and is easy to operate. The obtained compounds can be applied to important organic materials, such as luminescent materials, antibacterial and anticancer drugs, and pesticides. They can also be used as intermediates in the synthesis of organic materials and drugs, and for the preparation of various materials and drugs.

Provided in the present disclosure are a gas, a gas combination for plasma etching, an etching method and semiconductor equipment, belonging to the field of plasma etching. In the etching process, one or more of a carbonyl halide, an acyl halide and a carboxylic acid halide are provided as process gases and are excited to form a plasma to etch a layer to be etched, so that the problem of inconsistency between the top and the bottom caused by the fact that the etching rate of the bottom is quite different from the etching rate of the middle part when etching is performed to a certain extent to form a high-aspect-ratio hole or groove is solved, the morphology of high-aspect-ratio etching is significantly improved, the collimation is ensured, and the effectiveness of the semiconductor structure is improved.

This invention provides a method for preparing a modified SAM-perovskite interface and its application, as well as a method for preparing perovskite solar cells, relating to the field of perovskite solar cells. The method for preparing the SAM-perovskite interface includes: preparing a SAM solution using ethanol as a solvent, coating the SAM solution onto the surface of a TCO substrate, and obtaining a SAM-TCO substrate after annealing; preparing an acyl halide compound solution using chloroform as a solvent and coating it onto the surface of the SAM-TCO substrate to form an interface control layer, thereby obtaining a modified SAM-TCO interface; and preparing a perovskite solution using DMSO / DMF as a solvent and coating the perovskite solution onto the modified SAM-TCO interface to obtain a modified SAM-perovskite interface. This invention simultaneously achieves the chemical purification of the perovskite active layer and the strengthening of the SAM molecular anchoring structure, significantly improving device efficiency and greatly enhancing long-term stability.

This invention discloses a method for preparing hyperbranched polyphenylene sulfide-modified nanomaterials. By modifying the ends of mesoporous nanomaterials with amino groups, and reacting the amino groups with acyl halides at low temperature, terminal halogen-modified mesoporous nanomaterials are obtained. Then, polyphenylene sulfide is grown on the surface of the mesoporous nanomaterials through an electrophilic substitution reaction. The resulting nanomaterials are in-situ polymerized with oligophenylene sulfide resin, which greatly enhances the compatibility between the nanomaterials and polyphenylene sulfide resin, while improving the corrosion resistance of thermoplastic resins and extending the service life of thermoplastic resin coatings in geothermal environments.

This invention relates to the field of agricultural chemicals, particularly to the insecticide indoxacarb, and specifically to a method for preparing the synthetic intermediate of indoxacarb. The method involves constructing an α,β-unsaturated carbonyl compound using the Knoevenagel reaction, followed by further reduction to obtain the target compound. Compared to the nucleophilic substitution reaction conditions in the original literature, this method offers milder conditions and greater solvent selectivity, making it suitable for large-scale industrial production of acyl halide derivatives. This method is not only simple and efficient, but also boasts high yield and high purity, allowing the target compound to be obtained through simple purification steps.

This invention relates to the field of maleic anhydride production technology, specifically to a method for improving the stability of maleic anhydride. The method includes adding a stabilizer to the maleic anhydride, comprising organotin / organoantimony compounds, organotin compounds and / or organoantimony compounds, acyl halides, metal oxides, antioxidants, and polymerization inhibitors; the stabilizer comprises: 105-5050 parts by weight of organotin / organoantimony compounds, 10-5080 parts by weight of acyl halides, 105-5030 parts by weight of metal oxides, 10-50 parts by weight of antioxidants, and 105-5040 parts by weight of polymerization inhibitors. After adding the stabilizer, the color number of maleic anhydride stabilizes within 25 after being kept at 140℃ for 2 hours, which meets the requirements of GB / T 3676-2020. At the same time, the color number of maleic anhydride after being stored at 60℃ for 90 days is within 35. The color numbers of maleic anhydride all meet the requirements of GB / T 3676-2020, which can meet the needs of producing high-quality maleic anhydride products and is suitable for the industrial production of maleic anhydride products.

This invention relates to the field of curing agent synthesis technology and provides a method for synthesizing an active ester curing agent, comprising the following steps: Step 1, mixing and dissolving a phenolic hydroxyl-containing resin and an acylating agent in a solvent, heating and controlling the reaction temperature to obtain mixture one; Step 2, adding a catalyst solution dropwise to mixture one while stirring to obtain mixture two; Step 3, separating the mixture, washing with water, and removing the solvent to obtain the active ester curing agent; wherein the acylating agent is one of an acyl halide, an anhydride, or a carboxylic acid; and the hydroxyl conversion rate is 60-95%. Therefore, this invention synthesizes an active ester curing agent by controlling the hydroxyl conversion rate and applies it to low-dielectric copper-clad laminates, exhibiting both high adhesion strength and low dielectric properties.

This invention discloses a high-yield method for preparing hydroxamic acid, relating to the field of organic synthesis technology. The specific steps are as follows: Hydroxylamine hydrochloride is dissolved in water and cooled; liquid alkali is added dropwise to generate free hydroxylamine; a carboxylic acid ester is added, and the pH is adjusted to 8–10, reacting until the ester residue is ≤2%; a small amount of the corresponding acyl halide is added, and the pH is maintained to continue the reaction until complete; acidification and crystallization yield high-purity hydroxamic acid. This invention uses carboxylic acid ester as the main raw material and a small amount of acyl halide as a synergist, employing a staged reaction to overcome the later-stage kinetic bottleneck, significantly reducing ammonia nitrogen in wastewater. The process is mild, low-cost, and easily industrialized, suitable for the preparation of high-purity products such as benzoyl hydroxamic acid, salicylic acid, and octanoyl hydroxamic acid.

This invention discloses an N-aryl(2-acylaminobenzoyl)aminoamide compound, its preparation method, and its uses. This compound is generated by reacting Boc-amino acids and aromatic amines in dichloromethane under the action of EDCI, DMAP, and triethylamine. The N-Boc-aminobenzoyl compound is then acid-hydrolyzed with trifluoroacetic acid to obtain an aminobenzoyl compound. Next, the aminobenzoyl compound is reacted with indomethacin anhydride in acetonitrile under the action of potassium carbonate to generate a diamide compound. Finally, the diamide compound is reacted with an acyl halide in the action of triethylamine to obtain the N-aryl(2-acylaminobenzoyl)aminoamide compound. The raw materials used in the synthesis are inexpensive and readily available, and the synthesis method is simple. This compound exhibits good inhibitory activity against crop pathogens, particularly against Sclerotinia sclerotinia, Phytophthora blight, Fusarium head blight, rice blast fungus, gray mold, sheath blight, and rot fungus.

This invention provides a method for synthesizing polyaromatic ketone compounds. Belonging to the field of polymer material preparation technology, the method includes the following steps: using a high-boiling-point organic Lewis base as a solvent, and under Lewis acid catalyst conditions, polymerizing monomers undergo a Friedel-Crafts acylation reaction at a reaction temperature of 100-350°C to obtain the polyaromatic ketone compound. The polymerizing monomers are: a) an aromatic diacyl halide compound and an aromatic compound containing two active hydrogen atoms; and / or, b) an aromatic compound with an acyl halide at one end and an active hydrogen atom at the other end. The preparation method of this invention can obtain high molecular weight polyaromatic ketone compounds.

The application discloses a citronellol-based antibacterial polymer and a preparation method and application thereof. First, a citronellol-based initiator is synthesized through esterification reaction of citronellol and an acyl halide, and then DMAEMA and HEMA are polymerized through ATRP to obtain the citronellol-based antibacterial polymer; and then the citronellol-based antibacterial polymer is connected to cotton through a covalent bond by using diisocyanate to obtain a washing-resistant antibacterial cotton fabric, which has greater application value in the field of medical cotton fabrics. The citronellol-based antibacterial polymer prepared by modifying citronellol and combining with the polymer has obviously enhanced antibacterial effect and is firmly grafted to the cotton, and is expected to be used in industrial production.