30 results about "Diphenic acid" patented technology

The present invention provides an additive for cellulose ester resin, which is obtained by esterification between dibasic alcohol (s1) and aromatic dicarboxylic acid compound (a2) and has a number-average molecular weight in a range of 300-3,000. The aromatic dicarboxylic acid compound (a2) is more than one component selected from terephthalic acid, terephthalic dialkyl ester, naphthalenedicarboxylic acid, naphthalenedicarboxylic dialkyl ester, diphenic acid and diphenic dialky ester. The additive for cellulose ester resin can make an optical film to have excellent optical performance and moisture-penetration resistance. Furthermore the optical film with excellent moisture-penetration resistance in high temperature and high moisture is provided.

The invention provides a method for synthesizing 4,4'-diphenic acid. In the method, high-boiling-point polyethylene glycol 400 is used as a solvent, cuprous iodide (CuI) is used as a catalyst, and 4,4'-diphenic acid is obtained in the condition of presence of diethylenediamine and potassium hydroxide (KOH) by a reduction coupling new method. The synthesis method has the advantages that the method for synthesizing 4,4'-diphenic acid is simple, the synthesizing condition requirements are not high, the operation is easy, the production cost is low, the yield is very high, the purity is also very high and the repeatability is good, so that the method is suitable for the requirements of large-scale industrialized production; the solvent polyethylene glycol 400 used by the reaction system has high steam pressure, does not pollute the environment and is environment-friendly; and the purification method is simple, column separation purification is not needed, and purification can be carried out just by a common recrystallization method.

The invention belongs to the technical field of resin production, and particularly relates to a polyester resin for an anti-yellowing HAA (N,N,N',N'-tetra(Beta-hydroxyethyl)adipamide) system and further relates to a preparation method and application of the polyester resin. The anti-yellowing HAA system provided by the invention is polymerized by using pyromellitic dianhydride, 1,6-hexanediamine,isophthalic acid, phloroglucinol formic acid, ethanetricarboxylic acid monoester, 2,5-dihydroxy hexane, neopentyl glycol and 2,2'-diphenic acid. Because a polyimide chain is carried in the molecular chain of the polyester resin obtained by the materials and a specific process, the high temperature-resistant and anti-yellowing properties are excellent; moreover, because the materials containing phenolic hydroxyl groups, such as phloroglucinol formic acid and ethanetricarboxylic acid monoester, are used for participating in reaction and the phenolic functional group with high anti-yellowing capability is contained in the polyester chain, the polyester product has excellent high temperature-resistant and anti-yellowing properties, and is ultimately used in the powder paint of the HAA system,so that a coated panel with excellent anti-yellowing property can be obtained.

A polyamide resin composition is provided, which contains 100 parts by weight of a polyamide resin (A) that has dicarboxylic acid units (a) containing from 60 to 100 mol% of terephthalic acid units and diamine units (b) containing from 60 to 100 mol% of C6-18 aliphatic alkylenediamine units, and from 1 to 100 parts by weight of a polybromostyrene (B), in which from 0.5 to 100% by weight of the polybromostyrene (B) is a polybromostyrene having an epoxy group. The polyamide resin composition has good flame retardancy, good chemical resistance, good surface appearance and good blistering resistance.

The invention discloses an Europium fluorescent probe and test paper based on diphenic acid and application thereof in the detection of p-phenylenediamine, the structural unit of the fluorescent probe is [PMI]2[Eu2(BPDC)3C12], wherein the PMI represents 1-propyl-3-methylimidazole monovalent cation, BPDC represents diphenic acid radical that loses protons on two carboxyl groups; the fluorescent probe belongs to a monoclinic crystal system and the space group is P21/c. the crystal cell parameters are as follows: alpha is equal to gamma, which is equal to 90 degree, belta is equal to 96.6830(10) degree; and the crystal cell volume of z is equal to 4. The fluorescent probe of the invention has excellent red fluorescence properties and shows bright red under the irradiation of an ultraviolet lamp, the p-phenylenediamine in the aqueous phase has a significant quenching effect on the red fluorescence of the fluorescent probe and test paper, so the fluorescent probe and test paper can be used for detecting p-phenylenediamine with high sensitivity, high selectivity and anti-interference, the fluorescent probe and test paper are disposable (similar to normal pH test paper).

The invention relates to a method for detecting a 1,2-benzenedicarboxylic acid-dialkyl ester plasticizer in plastic through gas chromatography-mass spectrometry. The method comprises the steps that 1, a standard solution is prepared; 2, instruments and measurement work conditions are optimized; 3, a sample to be detected is prepared, purified and extracted; 4, a standard curve is built; 5, the detection limit, the lower quantitation limit, the precision and the recovery rate of the method are determined; 6, the sample to be detected is determined according to the determination method built in the step 1 to the step 5. According to the method, the detection efficiency and the detection accuracy are improved.

The invention relates to a pentanuclear-ytterbium-cluster-molecule-structure-unit-conitaning metal organic framework, and a preparation method and application thereof. The technical scheme is as follows: adding Yb(NO3)3, a 5,5'-(pyridyl-2,5-disubstituted)-1,3-phthalic acid, a solvent N,N-dimethylformamide and water into a high-temperature-resistant screw glass bottle, and stirring at normal temperature; sealing the container, putting into a drying oven, and heating at 105 DEG C for 4 days; slowly cooling to room temperature to obtain colorless transparent massive crystals; and washing with N,N-dimethylformamide, filtering, and drying to obtain the target product. The pentanuclear-ytterbium-cluster-molecule-structure-unit-conitaning metal organic framework has favorable size selectivity and catalytic property for carbon dioxide cycloaddition reaction of epoxides.

The present invention discloses process of preparing 4'-trifluoro methyl-2-diphenic acid. The process includes the following steps: 1. the reflux reaction of p-chloro trifluorotoluene and magnesium chip in anhydrous tetrahydrofuran under nitrogen protection to obtain Grignard reagent; 2. mixing o-chloro phenyl nitrile, 1, 2-bis(diphenyl phosphine) ethane nickel chloride and tetrahydrofuran via stirring; dropping the Grignard reagent; filtering and eliminating solvent to recover tetrahydrofuran; adding toluene and water solution of ammonium chloride; and oil-water separating to obtain toluene solution of 4'- trifluoro methyl-2-cyan diphenyl; and 3. heating the toluene solution in alkaline water solution to hydrolyze; oil-water separation to obtain water solution of 4'-trifluoro methyl-2-diphenic sodium and further treatment to obtain 4'-trifluoro methyl-2-diphenic acid. The process has high yield, low cost and other advantages, and is suitable for industrial production.

The invention relates to the field of chemical synthesis, and in particular to a synthesis method for 4,4'-biphenyldicarboxylic acid. The synthesis method for 4,4'-biphenyldicarboxylic acid is characterized by comprising the following reaction steps of: step 1, reacting 4-diphenic acid, oxalyl chloride and aluminium trichloride in a molar ratio of 1: (1.1-1.8): (1.2-2.0) to obtain 4,4'-dicarboxylbibenzil, wherein the weight ratio of 4-diphenic acid to a solvent is 1: (3 to 10); and step 2, reacting 4,4'-dicarboxylbibenzil, an oxidant and potassium hydroxide in a molar ratio of 1: (1.2-2.0):(1.4-2.2), and then carrying out recrystallization by absolute methanol to obtain 4,4'-biphenyldicarboxylic acid, wherein the weight ratio of 4,4'-dicarboxylbibenzil to an organic solvent is 1: (3-10). Compared with the prior, the synthesis method for 4,4'-biphenyldicarboxylic acid disclosed by the invention has the beneficial effects of being reasonable and practicable in process flow, high in yield which is up to move than 93%, moderate in process reaction conditions, low in requirements on equipment, and suitable for industrialized production.

This invention relates to a method for producing 4-amyl-biphenylcarboxylic acid-3-fluoro-4-cyanophenol ester, comprising: amyl-biphenylcarboxylic acid, thionyl chloride, 3-fluoro-4-cyanophenol, toluene, sodium-hydroxide, and anhydrous ethyl alcohol as raw material, with mole ration as: amyl-biphenylcarboxylic acid 1.05, thionyl chloride 2.65, 3-fluoro-4-cyanophenol 1, toluene 3, sodium-hydroxide 0.1, and anhydrous ethyl alcohol 4.0. The process comprises two steps: (1) use amyl-biphenylcarboxylic acid and thionyl chloride as raw material for acylation reaction and synthesize amyl-bibenzoyl chloride by normal pressure and decreasing pressure distillation; (2) dropwise add amyl-bibenzoyl chloride and 3-fluoro-4-cyanophenol with toluene as solvent for esterification, and produce the target product 4-amyl-biphenylcarboxylic acid-3-fluoro-4-cyanophenol ester by water washing, alkaline washing, crystallization and recrystallization, wherein the conditions: acylation reaction temperature 160Deg C, reflux time 6h, normal distillation temperature 172-176Deg C, pressure decreasing temperature 118-121Deg C, vacuum 50mmHg, the discharging condition is to collect the 3Deg C range product after temperature and pressure stabilized, the temperature of adding 3-fluoro-4-cyanophenol with agitation for acylation reaction is 100Deg C, keep the temperature between 90 and 100Deg C when dropwise adding amyl-bibenzoyl chloride for 3h, reflux with agitation for 6h, heating steam pressure no more than 0.2MPa, autoclave inside temperature kept at 120+2Deg C, crystallization temperature -15Deg C and kept at -15+-2Deg C for 1h for agitation, recrystallization temperature -15Deg Cand kept at -15+-2Deg C for 1h for agitation.

The invention discloses a 2, 2'-biquinoline azide-zinc metal complex and a preparation method and application thereof. The preparation method utilizes a solvothermal synthesis method and comprises that reactants such as zinc nitrate hexahydrate, sodium azide and 2, 2'-biquinoline undergo a reaction according to a mole ratio of 1: 2: 1 in a solvent which is a mixed solution of an appropriate amountof 2, 2'-diphenic acid, methanol and water at a temperature of 130-150 DEG C, the reaction system is kept at the temperature for 3 days and then is cooled to the room temperature, the reaction product is filtered, then the filter cake is washed through diethyl ether so that the 2, 2'-biquinoline azide-zinc metal complex monocrystal C18H12N8Zn is obtained. The complex has a single-molecule structure. Through a hydrogen bond and pai...pai aromatic ring stacking, the three-dimensional supramolecular structure is obtained. Through ultraviolet excitation, strong fluorescence is produced at 418 nm.The 2, 2'-biquinoline azide-zinc metal complex is a novel fluorescent material and can be used for preparing fluorescent emitting devices.

The invention discloses a cast film with a high barrier property. PP plastic particles and PET plastic particles are added into a co-extruding film casting machine to prepare a PET/PP film containing a PET layer and a PP layer. The PP plastic particles are prepared through blending modification, and N,N'-(4,4'-methylene diphenyl)bismaleimide, trimethylolpropane trimethacrylate and 4,4'-dihydroxy diphenyl sulfide are added to improve the barrier property of the cast film. The PET plastic particles are modified through a synthetic modification method, and comprise 2-nitroterephthalic acid-4-methyl ester, maleic anhydride, 2-methyl-2,4-pentanediol, 2,3-diobromoethane-1,4-glycol, tetrabromo terephthalic acid, bis(2-ethyl hexyl)terephthalic acid, 4-phthalic anhydride, 2-amino terephthalic acid, 10 parts of 2,2-diemthyl-1,3-propylene glycol, 2,2-difluoro-1,3-benzodioxole, magnesium fluosilicate and antibacterial agent with terephthalic acid and ethylene glycol being base materials. Through complementation of the two materials, the good effect of high barrier, flame retardancy and antibacterium is achieved.

The invention discloses a preparation method of 2,2'-diamido-diphenic acid. The preparation method comprises the following steps: firstly, mixing [1,1'-biphenyl]-4,4'-dimethyl dicarboxylate with a reaction solution C, stirring and reacting under the condition of ice bath, reacting at room temperature and adding ice blocks; after extracting, washing with saturated salt water, drying with anhydroussodium sulfate, and carrying out decompressing and spin drying to obtain a compound A; secondly, mixing the compound A with methanol for stirring, adding palladium carbon, displacing the air with hydrogen, stirring at room temperature, removing the palladium carbon by filtering and carrying out decompression concentration to obtain a compound B; thirdly, dissolving the compound B in tetrahydrofuran, adding double distilled water and potassium hydroxide, stirring at room temperature, washing with organic phase for two times and combining the water phase with water for cleaning the organic phaseto obtain a mixed solution F; adjusting the pH value of the mixed solution F to 3 by using concentrated hydrochloric acid, filtering and carrying out air drying to obtain the 2,2'-diamido-diphenic acid. The preparation method of the 2,2'-diamido-diphenic acid disclosed by the invention has the advantages of simplicity, high yield and low production cost.

The invention relates to a biphenyl bisamide compound as well as a preparation method and application thereof. The biphenyl bisamide compound is prepared by reacting 2,2'-diphenic acid anhydride or a derivative thereof with corresponding amines (H2NR1 and H2NR2) respectively. The biphenyl bisamide compound provided by the invention has remarkable insecticidal activity and a selective insecticidal spectrum, is simple in preparation process, and is expected to be developed into a novel pesticide which is low in toxicity, efficient and environment-friendly.

The invention discloses an asymmetric diphenic acid isomeride separation method, which includes the steps of mixing mixed acid and inorganic alkali in a water solution, stirring the solution to clarify the solution to obtain metal salt, performing heating reflux to distill partial water out to turbid the solution, cooling the solution to precipitate-out solid, re-dissolving the solid in the water solution, and performing acidification to obtain the product. The method is mild in reaction conditions, is simple in operation and is good in separation effect.

The invention provides a method for separating diphenic acid from tower bottom waste for preparing benzoic acid, and in particular relates to a method for extracting mixed diphenic acid from tower bottom waste for preparing benzoic acid by direct liquid phase oxidation of toluene and separating and purifying 3-phenyl benzoic acid and 4-phenyl benzoic acid. Any high-toxicity organic solvent and any catalyst are not used in the reaction process; the purification process is simple in operation; and the toluene serving as an organic solvent in the reaction process and the purification process canbe recycled in a rectifying mode, and ethanol serving as an organic solvent can be recycled by rectification after simple treatment. The method further expands the utilization range of the tower bottom waste for preparing the benzoic acid by direct liquid phase oxidation of the toluene, and has the advantages of simplicity and convenience in operation, easiness in separation and purification of the product, low environmental pollution, low cost, high economic value and the like.

The invention provides 4-diphenyl formate/LEuH nanometer complex and a synthetic method thereof. The synthetic method comprises the following steps of: a) dissolving EuCl3.6H2O, NaCl and hexamethylenetetramine (HMT) in water, and introducing N2 to perform a hydro-thermal reaction, filtering, washing, and drying to synthesize Eu(OH)2.5Cl0.5.nH2O; and b) adding NaOH into 4-diphenic acid to obtain sodium salt solution of the 4-diphenic acid, dispersing the Eu(OH)2.5Cl0.5.nH2O prepared in the step a) in the sodium salt solution of the 4-diphenic acid to perform the hydro-thermal reaction, and washing and drying, wherein the molar number of the 4-diphenic acid is 3 times that of the Eu(OH)2.5Cl0.5.nH2O. In the synthetic method, 4-diphenyl formate is inserted among LEuH layers to improve the efficiency of energy transfer, the stability of the synthesized 4-diphenyl formate/LEuH nanometer complex is high, and the luminous performance of Eu<3+> is enhanced, so the complex is a lamellate composite material with excellent performance.