33 results about "Diphenyl oxalate" patented technology

The invention discloses a preparation method of a carbon nanoparticle chemiluminescent liquid. According to the method, fluorescent carbon nanoparticles are taken as a luminous agent, and dibutyl phthalate is taken as a solvent and hydrogen peroxide and diphenyl oxalate are taken as exciting materials by virtue of the fluorescent carbon nanoparticles; hydrogen peroxide and diphenyl oxalate are subjected to chemical reaction to generate high-energy materials for exciting the carbon nanoparticles to generate chemical fluorescence; dibutyl phthalate, 30% hydrogen peroxide and a small quantity of tertiary butanol used as a cosolvent are added into a beaker in sequence to prepare a colorless transparent solution; dibutyl phthalate, the carbon nanoparticles, diphenyl oxalate and sodium salicylate are added into the beaker and are heated and dissolved to prepare a solution; the two solutions are mixed at a ratio of 1:1 to obtain the carbon nanoparticle fluorescent liquid, and the chemical fluorescence can be generated after the two solutions with the same volume are mixed. The chemiluminescent liquid synthesized by adopting the method is high in luminous brightness, long in duration time, free of cancerogenic substances and heavy metal pollution, low in preparation cost and easy for large-scale industrial production.

The present invention discloses a method for catalytically synthesizing phenyloxalate by utilizing diethyl acetate and phenol as raw material. The mole ratio of diethyl acetaet and phenol is 1:20-20:1, its reaction time is 1-8 hr, reaction temperature is 160-240 deg.C and autogeneous reaction pressure is 0-1.0 MPa. Under the action of load metal oxide catalyst the above-mentioned raw material are undergone the process of ester-interchange reaction so as to obtain the invented phenyloxalate.

The present invention uses dimethyl oxalate and phenol as raw material, under the condition of that the raw material feeding mole ratio of dimethyl oxalate: phenol is 1:20-20:1, reaction time is 1-4 hr., reaction temp. is 170-190 deg.C, autoreaction pressure is 0-1.0 MPa and in the presence of catalyst the ester exchange reaction process is made, and it is characterized by that said catalyst is a load metal oxide, and the dose of said catalyst is 1 / 64-1 / 16 of total feeding amount.

The invention discloses a preparation method of a supported MoO3 catalyst for synthesizing phenyloxalate. The preparation method adopts a plasma method, and the main process comprises the steps of: preparing catalyst carriers and preparing the supported MoO3 catalyst and the like. The supported MoO3 catalyst prepared by the preparation method has high catalytic activity and selectivity in ester exchange of phenol and dimethyl oxalate and synthesis into methyl phenyl oxalate and phenyloxalate. The preparation method disclosed by the invention has the advantages of mild operation condition, no pollution to the environment, no corrosion to equipment, low energy consumption, easy implementation for separation from a reaction system and recycling and the like.

The invention discloses a preparation method of a carbon nanoparticle chemiluminescent liquid. According to the method, fluorescent carbon nanoparticles are taken as a luminous agent, and dibutyl phthalate is taken as a solvent and hydrogen peroxide and diphenyl oxalate are taken as exciting materials by virtue of the fluorescent carbon nanoparticles; hydrogen peroxide and diphenyl oxalate are subjected to chemical reaction to generate high-energy materials for exciting the carbon nanoparticles to generate chemical fluorescence; dibutyl phthalate, 30% hydrogen peroxide and a small quantity of tertiary butanol used as a cosolvent are added into a beaker in sequence to prepare a colorless transparent solution; dibutyl phthalate, the carbon nanoparticles, diphenyl oxalate and sodium salicylate are added into the beaker and are heated and dissolved to prepare a solution; the two solutions are mixed at a ratio of 1:1 to obtain the carbon nanoparticle fluorescent liquid, and the chemical fluorescence can be generated after the two solutions with the same volume are mixed. The chemiluminescent liquid synthesized by adopting the method is high in luminous brightness, long in duration time, free of cancerogenic substances and heavy metal pollution, low in preparation cost and easy for large-scale industrial production.

The invention relates to a method for recovering diethyl oxalate and methyl acetate from triazine ring cyclization mother liquid by taking polyhydric alcohol as a carrier. The comprehensive treatment of the triazine ring cyclization mother liquid is realized by adding high-boiling-point polyhydric alcohol as the carrier, acidizing and esterifying the triazine ring cyclization mother liquid, desalting, recovering methanol, ethanol and methyl acetate through distillation, recovering diethyl oxalate through esterification and recycling the polyhydric alcohol. The methanol, the ethanol, sodium acetate and sodium oxalate in the triazine ring cyclization mother liquid are completely recovered, the recovered methanol, ethanol, methyl acetate and diethyl oxalate can be completely reused for the triazine ring cyclization step, and only one solid material, namely sodium chloride, is generated.

The present invention uses dimethyl oxalate and phenol as raw material, under the condition of that the raw material feeding mole ratio of dimethyl oxalate: phenol is 1:20-20:1, reaction time is 1-4 hr, reaction temp. is 170-190 deg.C, autoreaction pressure is 0-1.0 MPa and in the presence of catalyst the ester exchange reaction process is made, a it is characterized by that it catalyst is tin modified TS-1 molecular sieve, and the dose of said catalyst is 1 / 64-1 / 16 of total feeding amount.

The invention relates to polyamide resin and a preparation method thereof. The polyamide resin has excellent melting retention stability, low hydroscopicity and excellent mechanical properties. A degree of polymerization of polyamide resin can be improved by the preparation method in short time. The polyamide resin is prepared by condensation of at least diacid and diamine components. A use ratio of diphenyl oxalate to diacid is in a range of 20-100mol%, a use ratio of C4-C12 aliphatic diamine to diamine is in a range of 4-12mol%, sulfuric acid with a concentration of 96% is used as a solvent, and relative viscosity A of a polyamide resin solution with a concentration of 0.01g / ml at a temperature of 25 DEG C is in a range of 2.35-6.00. The polyamide resin can be used for resin molded products such as automobile parts, electrical parts, mechanical parts, household articles, transaction articles, buildings and physical articles, fibers or films.

A collection bottle that emits light once the lid of the bottle is rotated to its complete closed position is disclosed. An annular chamber concentric to the inner chamber of the collection bottle contains a dye such as fluorophor, a base catalyst, and diphenyl oxalate. A containment device is disposed in the annular chamber. The containment device holds one or more glass or other fragile material encasing vials containing hydrogen peroxide. The containment device is disposed in the vicinity of the bottle screw threads such that when the lid is completely screwed onto the collection bottle, a detent that is disposed above the superior lid screw thread compresses the exterior wall of the annular chamber and containment device, causing rupture of the vial(s) and allowing the hydrogen peroxide disposed therein to mix with the dye, base catalyst and diphenyl oxalate in the annular chamber. The subsequent chemical reaction causes the emission of light, visually indicating full closure of the lid on the collection bottle.

The invention belongs to the technical fields of organic chemistry and catalytic chemistry, and relates to an organic acid-base catalyst which is used for carboxylic acid aryl-ester groups which are compounded by ester exchanges. The organic base in the organic acid-base catalyst refers to an organic compound which contains nitrogen, phosphorus and halogen elements and solid-carrying organic base of the organic base, while the organic acid mainly refers to organic sulfonic acid, organic phosphorus acid, organic carboxyl acid, urea and the like and solid-carrying organic acid of the organicacid. The invention can be used as organic matters such as amino acid and the like which has double functions of organic acid and base and as catalysts which can be used to solid support the organic acid base on a same carrier. The catalyst of the invention has good catalytic performance and is easy to be separated from reaction systems, ester exchange conditions are temperate, the invention is convenient to continue, the conversion rate of oxalic dim-ethyl ester can reach over 90%, the selectivity to phenyloxalate can reach over 70%, and the invention is suitable for industry applications.

The invention discloses an application of a Br phi nsted acid ion liquid to preparation of diphenyl oxalate. Phenol and dimethyl oxalate are subjected to transesterification under the catalytic action of the Br phi nsted acid ion liquid, and the transesterification is carried out under a solvent-free condition, so that a mixture with diphenyl oxalate is obtained, wherein the reaction temperature ranges from 150 DEG C to 250 DEG C, the reaction time ranges from 2h to 5h, the mole ratio of phenol to diphenyl oxalate is (2.0-10.0):1, and the mole ratio of the Br phi nsted acid ion liquid as a catalyst to dimethyl oxalate as a substrate is 5-20%. By using the method, diphenyl oxalate (namely the mixture with diphenyl oxalate is obtained) can be greenly and safely prepared through the transesterification between phenol and dimethyl oxalate under mild reaction conditions and at high yield and low cost.

The invention relates to pressure-sensitive conductive adhesive tape. The pressure-sensitive conductive adhesive tape comprises an adhesive layer and a release material layer, and the release materiallayer comprises a flexible hollow layer and a stress luminescent layer, wherein the flexible hollow layer is filled with the stress luminescent layer; the stress luminescent layer is divided into anupper hollow layer and a lower hollow later through a glass membrane, the upper hollow layer and the lower hollow later are filled with a fluorescent agent and an exciting agent respectively, the fluorescent agent adopts fluorescent dye and phenyloxalate, and the exciting agent adopts hydrogen peroxide; under the oxidative action of the hydrogen peroxide, an intermediate product of 1,2-dioxyheterocyclic butanedione can be generated, the product is extremely unstable, is spontaneously decomposed and releases energy, and the energy is transmitted to fluorescent dye molecules, so that the productenters an excited state and lastly returns to a low-energy base state from the excited state, thereby giving out light; when the adhesive tape is pressed downward, the glass membrane is damaged afterbeing subjected to external acting force, the fluorescent agent and exciting agent on the breakage react, thereby giving out light; therefore, during pressing and adhesion, only a luminous point in the release material layer is observed, if no light is given out or the light is weaker somewhere, further pressing needs to be carried out.

The present invention is process of synthesizing methyl phenyl oxalate and diphenyl oxalate as the materials for preparing diphenyl carbonate under the catalysis of composite carrier supported metal oxide. Dimethyl oxalate and phenol in the molar ratio of 1 / 20-20 as materials produce ester exchange reaction at the temperature of 170-190 deg.c and pressure of 0-1.0 MPa in the presence of catalyst for 1-10 hr. The reaction features that the catalyst comprises composite carrier of TiO2 and other metal oxide and active component of metal oxide and has the use amount of 1 / 64-1 / 16 of total material weight. The present invention has the advantages of mild reaction condition, high material converting rate, target product selectivity over 98 %, etc.