96 results about "Para-toluenesulfonamide" patented technology

The invention discloses an industrial production method for toluene sulfonamide. Continuous amination is performed on paratoluensulfonyl chloride and ammonia gas in methylene dichloride solvent in a countercurrent absorbing way, then active carbon is used for decoloring, and through alcohol recrystallization and drying after water scrubbing, a qualified product can be obtained. Meanwhile, continuous production is achieved, that gas ammonia in tail gas is discharged within controlling index of national standards can be achieved, environment pollutions are reduced, and meanwhile, labor intensity is lowered. Solvent is adopted for replacing water for amination, the side reaction of hydrolyzation is stopped, and COD emission in waste water is lowered greatly while reaction conversion rate is improved.

The invention discloses a toughened plasticized nylon 612 composite material and a preparation method and applications thereof. The preparation method comprises the steps of: by taking polyolefin or polyolefin-grafted maleic anhydride or polyolefin-acrylic ester copolymer or polyolefin acrylic ester ion slats or compound thereof as a toughening agent, and N-n-butylbenzenesulfonamide or N-ethyl-o/p-toluenesulfonamide or a compound thereof as a plasticizer, adding a lubricant and an antioxidant, fusing and extruding in a double-screw extruder to obtain the toughened plasticized nylon 612 composite material. The comprehensive performances of the toughened plasticized nylon 612 composite material can meet the application demand of an automobile braking tube.

The invention relates to the technical field of chemistry, and particularly relates to a method for preparing modified composite adhesive. The method comprises the following steps: weighing the following components in parts by weight: 100 parts of a formaldehyde aqueous solution, 0.1-0.5 part of an alkaline substance solution and 0.3-0.6 part of amino-terminated hyperbranched polymer PAMAM, and stirring to obtain an initial mixture; adding 20-30 parts of 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide into the initial mixture, heating to 50-55 DEG C, adding 35-55 parts by weight of melamine, further heating to 90-95 DEG C, and reacting to obtain an initial polycondensate; adding melamine and para-toluene sulfonamide into the initial polycondensate to obtain a second polycondensate; adding 20-30 parts by weight of urea when the second polycondensate is cooled to 70-75 DEG C, further reacting for 8-12 hours, and adding 3-5 parts of a first formaldehyde scavenger and 2-6 parts of a second formaldehyde scavenger when the temperature is reduced to 30-50 DEG C so as to obtain a first adhesive; and mixing the first adhesive and a second adhesive in a mass ratio of (3-7):1 to obtain the modified composite adhesive. The modified composite adhesive is environmentally friendly, and has a flame retarding effect.

The invention discloses a double-coating positive thermosensitive CTP plate, and particularly relates to the application of sulfamide-formaldehyde resin in a positive thermosensitive CTP plate. The double-coating positive thermosensitive CTP plate is used for solving the technical problem that an underexposure part of a printing plate precursor is poor in alkali resistance, the hardness becomes soft, and the plate developing latitude is decreased. According to the double-coating positive thermosensitive CTP plate, a support body of a hydrophilic surface is sequentially coated with a resin layer and a thermosensitive layer; the resin layer comprises film forming resin, alkali dissolution resin, coloring background dye, a development accelerant and the like; the thermosensitive layer comprises phenolic resin, an infrared absorption agent, a dissolution inhibitor/promoter, coloring background dye and the like; the added resin in the resin layer of the positive thermosensitive CTP plate is o/p-toluenesulfonamide formuladehyde resin with the structure as shown in the specification, wherein n is 2-3, and CH3 is o/p-methylphenyl. By adopting the technical scheme, the double-coating positive thermosensitive CTP plate has good latitude and pressure.

The invention relates to a positive-image thermosensitive light-sensitive composition. A coating in an unexposed part is small in density and good in tolerance level, good in solvent resistance and good in scratch resistance. The composition is characterized by comprising phenolic resin, alkali-soluble solvent-resistant acrylic resin, sulfonamide-formaldehyde resin, an infrared absorption dye, a background dye, a dissolution inhibitor, and the like. The sulfonamide-formaldehyde resin is the critical component of the composition. A edition drying step is arranged in a production process in order to remove solvent in a coating formula and the temperature can reach 120-150 DEG C, and if ortho- or para- toluene sulfonamide-formaldehyde resin is added, after being baked, the ortho- or para- toluene sulfonamide-formaldehyde resin and other resin in a thermosensitive coating can be crosslinked. After the crosslinking is performed in the unexposed part, the alkali resistance and the strength of the coating are enhanced, so that the coating loss of the unexposed part during alkaline development is reduced. In the exposed part, the association of the infrared absorption dye and the phenolic resin is opened after heat absorption, and the infrared absorption dye is liable to dissolve in an alkaline developing solution, thus increasing the developing tolerance level of the thermosensitive coating.

The invention discloses a synthetic method of dihydropyrrole and pyrrole compounds. The method comprises: reacting Alpha,Beta-unsaturated ester as raw material with para toluene sulfonamide and aldehydes under the action of an organic small-molecular catalyst 1,8-diazabicycloundercane-7-ene or 1,5-diazabycyclo[4,3,0]one-5-ene without separating an intermediate product, directly adding N-bromosuccinimide and alkali, and enabling intramolecular cyclization under mild reaction conditions so as to produce multi-group substituted dihydropyrrole compounds difficult to prepare by a conventional method, with high yield and good stereoselectivity. The synthetic method is simple, environment-friendly and high in atomic economy, enables dihydropyrrole compounds to be quickly and efficiently synthesized with one kettle, and the synthesized dihydropyrrole compounds are dehydrogenized under the action of dichloro dicyane benzoquinone to directly obtain pyrrole compounds.

The present invention provides a method for preparing a composite negative electrode material for a lithium ion battery. The method uses the p-toluenesulfonamide modified fatty acid as the carbon source, and uses the nitrogen and sulfur element as dopant. The nitrogen/sulfur doped graphitized ordered mesoporous carbon material is prepared after high temperature carbonization, annealing and strong alkali treatment. The nano silicon powder coated with the nitrogen and sulfur doped mesoporous graphite material. The nitrogen and sulfur doped mesoporous graphite material can prevent the silicon from directly contacting the electrolyte, effectively alleviate the large volume expansion of silicon during charge and discharge, maintain the stability of the material structure, prevent the continuous formation of the SEI film, and improve the first discharge efficiency.

The invention relates to a special fluorescent pigment for leather. The special fluorescent pigment is prepared from the following raw materials: para toluene sulfonamide, tripolycyanamide, formaldehyde and polyurethane resins at a ratio of 1.0:0.8:0.6:0.3. Compared with the prior art, the fluorescent pigment has the following advantages and effects: 1, by using a pigment polymer covered by copolymers such as monomer acrylonitrile and methyl methacrylate, the emulsion stability is improved, the various fastness such as soaping fastness and bleeding fastness can be improved, and the environment pollution is reduced; 2, by using the copolymers such as monomer acrylonitrile and methyl methacrylate, the glass transition temperature of the polymer can be improved, a function of protecting a primary color body is achieved after copolymers such as monomer acrylonitrile are covered, and the sun-proof fastness is improved.

The invention discloses a melamine formaldehyde resin and a synthesis technology thereof. The melamine formaldehyde resin comprises the following ingredients: melamine, formaldehyde, para toluene sulfonamide, sodium hydroxide, propylene glycol, alcohol and water. The synthesis technology of the melamine formaldehyde resin comprises the following steps of adding the formaldehyde into a reaction kettle, starting a stirrer, adjusting the pH value by using the sodium hydroxide, adding the melamine into the reaction kettle, uniformly raising the temperature to 80-90 DEG C in 20-30minutes, keeping the pH value at 8.5-9.0, carrying out heat preservation at 84-86 DEG C, when the turbidity degree of the reaction liquid reaches 29-32 DEG, immediately adding the para toluene sulfonamide into the reaction kettle, rapidly reducing the temperature to 60-65 DEG C, adding the propylene glycol, the alcohol and the water into the reaction kettle, regulating the pH value of the resulting solution to 8.5-9.0 by using the sodium hydroxide, cooling the resulting solution to 40-45 DEG C, and discharging the solution. The melamine formaldehyde resin prepared by the method has the characteristics of small brittleness and good stability.

The invention relates to reinforced toughened melamine mold plastics and a preparation method. The melamine mold plastics are prepared from the following raw materials by weight percent: 80 to 96 percent of modified melamino-formaldehyde resin, 1 to 5 percent of glass fibers, 2 to 8 percent of wood cellulose, 1 to 6 percent of triethanolamine, 0.05 to 0.1 percent of curing agent, 0.5 to 1.0 percent of titanium dioxide, 0 to 1 percent of pigments, and the modified melamine-formaldehyde resin is prepared in the following steps: (1) adding 100 parts by weight of formaldehyde solution into a reaction kettle, adding sodium hydroxide to adjust the pH to be 8 to 9; (2) addition reaction: adding 5 to 15 parts by weight of THEIC and 5 to 15 parts by weight of PEG, beginning to heat, adding 80 to 100 parts of melamine, heating and reacting at 80 to 90 DEG C; (3) preserving the heat for 10 to 20min at the temperature of 80 to 90 DEG C, adding 5 to 15 parts by weight of para toluene sulfonamide, heating to 85 to 95 DEG C, and reacting to the end point; and (4) condensation reaction: when white precipitates are tested in the resin by utilizing the water of 4 DEG C, cooling to 75 DEG C, adjusting the pH value to 8 to 8.5, and stopping reacting.

The present invention discloses a production technics for a 8-hydroxide quinoline, which includes the following synthetic procedures that: firstly 2-N- p-toluenesulfonyl amino phenol is mixed with ethylamine and methanol, cooled, and dripped with acrolein, after dripping, the mixture is stirred continuously for reaction, then added with hydrochloric acid, stirred for reaction under raised temperature to produce an intermediate of p-toluenesulfonyl-8-hydroxide hydrogenated quinoline, secondly, the solution as above is added with solid sodium hydroxide, the temperature of the mixed solution is raised, and then undergoes circumfluence cooling down, then hydrochloric acid is used to regulate the pH=7.5-7.8 and, thirdly, water is added into the solution as above, temperature is raised and water steam distillation is carried out to obtain the high-purity 8-hydroxide quinoline. Compared with the preparation method in the prior art, the present invention has simple operation, economized investment on the equipment, high yields, low fabrication cost, and suitability for industrialized fabrication. The actual molecular yield of 8-hydroxide can reach to more than 85 percent of that of 8-hydroxyl quinoline, based on the amount of 2-N- p-toluenesulfonyl amino phenol.

The invention relates to an asymmetric synthesis method for (S,S)-2,8-diazabicyclo[4,3,0]nonane. N-benzyl-butene imidodicarbonic diamide is taken as a raw material, in presence of a chiral squaramidecatalyst (III), the N-benzyl-butene imidodicarbonic diamide and N-para-toluene sulfonyl-N'-propylene imidogen hydrazine (II) are subjected to an asymmetric [2+4] addition reaction, and 8-benzyl-2-para-toluene sulfonamide-7,9-dioxo-(1S,6R)-2,8-diazabicyclo[4,3,0]-3-alkene nonane is obtained; through the steps of recrystallization, reduction, acid-catalyzed hydrolysis and reduction, the (S,S)-2,8-diazabicyclo[4,3,0]nonane is obtained. The synthesis method is simple, the yield of the asymmetric catalysis product is high, the enantioselectivity of the product through recrystallization can reach 90% or above, and the asymmetric synthesis method is mild in condition, simple to implement, low in production cost and capable of being used for industrialized production.

The invention discloses a raw silk bentonite cutting fluid which comprises the following raw materials by weight: 1 to 2 parts of sodium biphosphate, 0.5 to 2 parts of zinc pyrithione, 0.8 to 1 part of N-ethyl-o/p-toluene sulfonamide, 3 to 4 parts of nano bentonite, 3 to 4 parts of polylactic acid, 16 to 20 parts of dimethyl sulfoxide, 4 to 5 parts of raw silk, 20 to 30 parts of triethanolamine borate, 2 to 3 parts of span 80, and 200 to 300 parts of deionized water. A fibroin lubricating liquid (an intermediate product of the raw silk bentonite cutting fluid) takes natural silk as a main material, thereby being nontoxic, free of pollution, and high in lubricity; triethanolamine borate, which is excellent in extreme pressure lubricity, rust-proof, anti-bacterial, capable of sterilizing and the like, is mixed with the fibroin lubricating liquid to obtain a liquid mixture; the liquid mixture is modified with polylactic acid. Therefore, the fracture strength and wettability of a blend membrane can be improved; a lubricating film layer formed on the friction metal surface can be more stable; the extreme pressure anti-wear property and reaction activity are improved effectively.

The invention relates to preparation methods of electromagnetic shielding materials, in particular to a preparation method of an electromagnetic shielding material based on a carbon material, polypyrrole and alpha-iron sesquioxide, and aims to solve the problem that existing single-component electromagnetic shielding materials are disadvantageous in performance. The preparation method includes: 1, preparing a carbon material subjected to acid treatment; 2, preparing the carbon material impregnated; 3, preparing the carbon material subjected to high-temperature treatment; 4, impregnating the carbon material subjected to high-temperature treatment in a mixed solution of FeCl3.6H2O and p-toluene sulfonamide, and freely reacting with pyrrole to complete the preparation method. The preparation method is used for preparing the electromagnetic shielding material based on the carbon material, polypyrrole and alpha-iron sesquioxide.

The invention relates to a method for preparing a medicine intermediate, namely 1-methyl-3-phenyl-piperazine. Epoxy phenylethane and N-methyl ethanolamine react for ring opening in a methylbenzene solution and further react with thionyl chloride to obtain N-(2- chloroethyl)-N-methyl-2-chloro-2-phenylethylamine hydrochloride, the hydrochloride reacts with toluene sulfonamide and sodium hydroxide in a DMF solution to obtain 1-methyl-4-p-toluenesufonyl-3-phenylpiperazine, the 1-methyl-4-p-toluenesufonyl-3-phenylpiperazine reacts with concentrated hydrochloric acid to remove sulfonyl, and a product is obtained through neutralization extraction and recrystallization. Compared with the prior art, the method for preparing the 1-methyl-3-phenyl-piperazine has the advantages of low cost of selected raw materials, cost conservation, few synthesis steps, convenient and safe operation, simple post-treatment, high reaction yield, high product purity, good quality, and suitability for industrialized application.

The invention discloses an automotive trim flame-resistant material and a preparing method thereof. The material comprises, by weight, 50-80 parts of polypropylene resin, 20-60 parts of anilmomethyl triethoxy silane, 10-40 parts of glass fiber reinforced polyethylene terephthalate, 20-30 parts of N-ethyl-p-toluenesulfonamide, 40-50 parts of barium sulfate, 40-50 parts of polyvinyl alcohol, 10-30 parts of dimethyl terephthalate, 20-60 parts of paraformaldehyde, 40-50 parts of arsenic trioxide, 2-8 parts of potassium oxide, 10-20 parts of dicyanodiamine, and 20-40 parts of adipic acid dihydrazide. According to the preparing method, the polypropylene resin, the anilmomethyl triethoxy silane, the glass fiber reinforced polyethylene terephthalate, the N-ethyl-p-toluenesulfonamide, the barium sulfate, the polyvinyl alcohol, the paraformaldehyde, the arsenic trioxide, the potassium oxide, the dicyanodiamine and the adipic acid dihydrazide are evenly mixed through a high-speed mixing machine for plasticizing fusion, dimethyl terephthalate injection is conducted at the same time, and the constituents are extruded after being mixed. The flame resistance of the automotive trim flame-resistant material is high.

The invention provides fluorinated thin film coating. The fluorinated thin film coating is prepared from the following raw materials in parts by weight: 0.1 to 0.3 part of 1H,1H,2H,2H-perfluorodecyltriethoxysilane, 0.7 to 1 part of zinc acetylacetonate, 1 to 2 parts of calcium fluoride, 4 to 5 parts of ammonium bicarbonate, 1 to 1.5 parts of vanadyl sulfate hydrate, 6 to 7 parts of sodium tungstate dihydrate, 20 to 30 parts of a silane coupling agent KH570, 5 to 7 parts of methyltriethoxysilane, 60 to 70 parts of 2 percent to 3 percent ammonia water solution, 0.3 to 0.4 part of aminopropyltriethoxysilane, 0.1 to 0.2 part of butyl oleate, 0.3 to 1 part of sodium butylnaphthylsulfonate, 1 to 3 parts of polyethylene glycol 1000 and 0.1 to 0.2 part of p-toluenesulfonamide. The silane coupling agent KH570 is used for carrying out modification treatment, and molecules of the silane coupling agent KH570 are grafted on tungsten-doped vanadium dioxide powder particles, so that the hydrophobicity of modified particles is effectively improved, and the surface strength of a coating film is further improved.

The invention relates to an electroplating solution. The solute comprises 160-220 g/L nickel sulfate, 30-60 g/L nickel chloride, 60-120 g/L cobaltous sulfate, 30-60 g/L boric acid, 0.3-0.8 g/L para toluene sulfonamide, 0.5-1.5 g/L 1,4-butynediol and 0.2-0.8 g/L sodium alkyl sulfonate. The solvent is water. The diamond saw band prepared by the electroplating solution has the advantages of uniform coating, high coating hardness, great force for holding diamond, great effective cutting surface, and obviously higher cutting efficiency and cutting power. Under the conditions of the same holding force, the coating thickness of the prepared diamond saw band is obviously lowered, thereby lowering the production cost of the diamond saw band, increasing the void ratio, being beneficial to discharge of cutting powder, and enhancing the cutting efficiency. Besides, the invention also relates to application of the electroplating solution.

The present invention provides a method of synthesizing 6-cyanophenanthridine compounds. The synthesis method comprises the steps of: taking a substituted azide terminal olefin compound represented bya formula (I) as an initial substance, using sodium ditosylamide as a nitrogen source, conducting a reaction at 60-120 DEG C for 3-6 hours under the action of a silver catalyst, an oxidizing agent and a solvent, and conducting separation purification on the reaction solution to obtain the 6-cyanophenanthridine compound represented by the formula (II). The synthesis method of the invention has thecharacteristics of low environmental hazard, mild reaction conditions, simple operation and the like.

A method for preparing para toluene sulfonamide by directly amidating para-toluenesulfonic acid comprises the following steps: (1) anhydrous para-toluenesulfonic acid is dissolved in dichloromethane, a catalyst, namely organic boronic acid, and a 5A molecular sieve are added in a mixed solution, and the mixed solution is uniformly stirred for a certain time under the condition that the temperature is controlled to be -10 to 0 DEG C; (2) an ammonia gas is introduced at the -10 to 0 DEG C for reaction; (3) after the reaction is finished, suction filtration is conducted on the reaction liquid to remove the molecular sieve, and then washing is respectively performed once with an acid solution, an alkali solution and a salt solution; (4) an organic phase is dried through anhydrous sodium sulfate, then a drying agent is removed, a dichloromethane solvent is subjected to distillation recovery, and crude para toluene sulfonamide is obtained; (5) weighing is performed after washing with distilled water and drying, and the product purity is analyzed through liquid chromatography. The complexation is generated between organic boric acid energy and oxygen on a sulfonic acid molecule, the reaction activity of the para-toluenesulfonic acid is improved, ammonia molecules are easily combined with sulfur to generate amide, the whole reaction energy consumption is low, no waste acid is discharged, and the yield of para toluene sulfonamide is about 40%.

The invention discloses a preparation method and application of a desulfurized fly ash energy-saving environmental-friendly building material adhesive. The desulfurized fly ash energy-saving environmental-friendly building material adhesive consists of the following components in parts by weight: cation water, fatty alcohol polyethylene oxide ether sodium sulfate salt, succinic anhydride, N-cyclohexyl para toluene sulfonamide, N,N-dimethyl-p-nitrosoaniline, 1-amino-5-hydroxyl-4-[(1-methyl propyl] amino]-8-nitro-9,10-anthraquinone, 1-phenylamino-4-hydroxyanthraquinone, p-Methylthiobenzyl alcohol, gold nanoparticles, 4,4'-diamido-triphenylmethane, succinic anhydride, 4,4'-(3,3'-dichlorobiphenyl-4,4'-dinitrogen)di(4,5-dihydro-5-oxo-1-phenylpyrazole-3-formic acid) diethyl ester, benzotriazole-1-tri(trimethylamino)-trifluorophosphate, N-(2-benzimidazolyl) methyl carbamate and alpha-bromonaphthalene. The preparation method has the advantages that the adhesive is prevented from saponification, the surface tension of mixtures is reduced, and the mixtures can be relatively solidly adhered to one another; the adhesive has the advantages of stable chemical properties, wide application and high surface cleanliness ratios of molded structures.