33 results about "Diphenyl oxalate" patented technology

A carried TiO2 catalyst used for synthesizing the phenyl oxalate used to prepare diphenyl carbonate (DPC) by ester exchange is prepared through preparing the dipping liquid, pretreating carrier, mixing it with said dipping liquid, hydrolyzing, drying and calcining. It has high activity and no pollution.

In this invention process, dimethyl oxalate and phenol are used as raw materials with molar ratio of 1:20 to 20:1, reaction time 1-5 hours, temp. of 170-190 deg.C, pressure 0-1.0 MPa, under the presence of catalyst to proceed ester exchange. The characteristics are: catalyst being of supporting type molybdenum trioxide, and taking the ratio of total feed of 1 / 64 to 1 / 16. Advantages are: mild reaction condition, short reaction time, high yield, catalyst being easily separated from reaction system, easily to achieve continuous prodn.

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 organic acid. 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.

A carried MoO3 catalyst for synthesizing phenyl oxalate by ester exchange reaction between phenol and dimethyl oxalate is prepared through preparing MoO3 slurry, grinding carrier, mixing them together, immersing and drying.

A composite titanium oxide-silicon oxide as the catalyst for synthesizing phenyl oxalate by ester exchange, which is used to prepare diphenyl carbonate (DPC), is prepared through preparing the precursor solutions, mixing to obtain sol, depositing, drying and calcining. It has high activity.

The method for preparing methyl phenyl oxalate and phenyl oxalate uses dimethyl oxalate and phenol as raw material, under the condition of that raw material feeding mole ratio of dimethyl oxalate: phenol is 1:2-2:1, reaction time is 1-4 hr, reaction temp. is 170-190 deg.C, autoreaction pressure is 0-1.0 MP and presence of catalyst the ester exchange reaction process can be made, and it is characterized by that said catalyst is mordenite, HZSM-5, H beta or TS-1 molecular sieve, and the dose of catalyst is 1 / 64-1 / 16 of total feeding amount.

A catalytic synthesis process for preparing methylphenyl oxalate and diphenyl oxalate features that under existance of the titanium silicon oxide as catalyst, the dimethyl oxalate proportionally reacts on phenol at 150-190 deg.c for 1-10 hr.

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 aload metal oxide, and the dose of said catalyst is 1 / 64-1 / 16 of total feeding amount.

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.

This invention relates the process for producing methyl phenyl oxalate and diphenyl oxalate, both of them being of raw materials of diphenyl carbonate (DPC). Dimethyl oxalate and phenol are used as raw materials with mole ratio of 1:20-20:1, reaction time of 1-5 hrs, temp. of 170-190 deg.C, pressure of 0-1.0 MPa, catalyst of bimetallic oxide as an amount of 1 / 64-1 / 16 of total feed being presence. Advantages are: mild reaction condition, short reaction time, high yield, catalyst being of easy to be separated from system, continuous prodn. to be achieved easily.

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.

The invention discloses an application of a Bronsted acid ion liquid to preparation of diphenyl oxalate. Phenol and dimethyl oxalate are subjected to transesterification under the catalytic action of the Bronsted 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 Bronsted 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 an organic base catalyst for synthesizing aryl carboxylate through ester exchange, belonging to the technical field of organic chemistry and catalytic chemistry. In a process of synthesizing aryl carboxylate through ester exchange, phenyl methyl oxalate and phenyloxalate are synthesized by using phenol and dimethyl oxalate as raw materials through ester exchange. The organic base catalyst is an organic compound containing nitrogen, phosphorus and halogen elements and immobilized organic base thereof; and hydroxyl on the surface of an immobilized heterogeneous catalyst is subjected to treatment of silane reagents with different polarities to obtain a catalyst with different surface polarities. The catalyst has good catalysis property, is easy to separate from a reaction system, is mild in ester exchange condition, convenient for continuation, and is suitable for industrialized application, wherein the transfer rate of the dimethyl oxalate can reach above 90 percent and the selectivity of the phenyloxalate can reach above 70 percent.

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 discloses a preparation method for a load type TiO2 catalyst for ester exchange compound diphenyl oxalate. The preparation method comprises the following steps: 1) weighting a certain amount of titanium source, dissolving in absolute ethyl alcohol, fully stirring and acquiring a maceration extract; 2) mixing and stirring the treated carrier and the maceration extract for 3h, and then starting to dropwise add a certain amount of deionized water and further full stirring, thereby acquiring a mixed solution; adding the carrier according to the mass fraction of TiO2 being 1-30% in the lastly acquired load type TiO2 catalyst; 3) standing by the mixed solution acquired in the step 2 for 24h-48h, thereby acquiring solid powder; 4) drying the solid powder for 5-10h at 80-150 DEG C, sending into a plasma generating device and treating for 3-120min, thereby acquiring the load type TiO2 catalyst. The preparation method has the advantages of mild operation and simple process. The prepared catalyst is high in selectivity and high in activity.

The invention relates to a method for preparing a catalyst for the gas phase catalytic synthesis of diphenyl oxalate from dimethyl oxalate, which comprises the following steps of: slowly adding a silica gel solution to an organic titanate-dispersant solution to completely hydrolyze, filtering, drying, grinding, tabletting, firing and so on to prepare the catalyst. The invention also relates to the application of the catalyst. The catalyst has high reactivity in a gas phase ester exchange reaction between diphenyl oxalate and phenol, the selectivity of diphenyl oxalate is high, the reaction is smooth and easy to control, and the catalyst has simple preparation method, low cost and long service life.

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.

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 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 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.