335 results about "Trimethyl benzene" patented technology

The present invention provides a compound of the formula: wherein ring A is an optionally substituted 5 to 10-membered aromatic ring; R¹ and R² are the same or different and each is an optionally substituted hydrocarbon group or an optionally substituted heterocyclic group; X is a bond and the like; and L is a divalent hydrocarbon group, and a salt thereof, except 3-(aminomethyl)-2,6,7-trimethyl-4-phenyl-1(2H)-isoquinolinone, 3-(aminomethyl)-2-methyl-4-phenyl-1(2H)-isoquinolinone, 3-(aminomethyl)-6-chloro-2-methyl-4-phenyl-1(2H)-isoquinolinone and 3-(aminomethyl)-2-isopropyl-4-phenyl-1(2H)-isoquinolinone. The compound shows a superior peptidase-inhibitory activity and is useful as an agent for the prophylaxis or treatment of diabetes and the like.

Imidazolium salts are the immediate precursors to N-heterocyclic carbenes (NHC) yet a simple, general synthetic route to a wide variety of imidazolium salts is not yet available. Such a straightforward route is described for two specific members of this family of ligand precursor: 1,3-Bis(2,4,6-trimethylphenyl)imidazolium chloride (IMes.HCl) and 1,3-Bis(2,6-diispropylphenyl)imidazolium chloride (IPr.HCl). The procedure appears general and similar protocols can be used to isolate various imidazolium salts.

Disclosed are paraffin inhibitors prepared by admixing a polymer having the characteristic of inhibiting paraffin crystalline growth in formation fluid from oil and gas wells with a first solvent selected from the weak to moderate wax solvents and a second solvent selected from the strong wax solvents. Exemplary weak to moderate wax solvents include benzene, toluene, xylene, ethyl benzene, propyl benzene, trimethyl benzene and mixtures thereof. Exemplary strong wax solvents include cyclopentane, cyclohexane, carbon disulfide, decalin and mixtures thereof. The solvent system disclosed has desirably better solubility with the polymers, even at reduced temperatures, than either solvent alone. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b)

The invention relates to a preparation method of single acyl or two acyl phosphine oxide and single acyl or two acyl sulfur phosphine compound, in particular to a preparation method of the 2,4,6-trimethylbenzene formacyl-diphenyl phosphine oxide of the photoinitiator. The addition reaction is carried out between Trimethyl benzaldehyde and diphenyl phosphorus chloride and then the mixture is oxidized by tert-butyl alcohol peroxide. The invention adopts the addition reaction of aldehyde and halogenated phosphorus and replaces the original process of acyl chloride and halogenated phosphorus, and has the advantages of greatly shortening the preparation procedures, low cost, easy operation and quick production. The compound prepared by the invention has more than 98 percent of the 2,4,6-trimethylbenzene formacyl-diphenyl phosphine oxide and can be served as the photoinitiator for solid for producing the solidification product with the performance of paint, varnish, porcelain glaze, paint, pigment or ink, and can better satisfy the increasing market demand.

The invention relates to a method for preparing mesoporous SBA-15 unstuck micro spheres, in particular a method for preparing mesoporous SBA-15 unstuck micro spheres for high-efficiency liquid chromatography. According to the method, a three-block copolymer P123 is used as a template agent, tetraethoxysilane, hydrochloric acid, potassium chloride, mesitylene, ammonium fluoride and polyvinyl alcohol are used as raw materials, and the dispersity of the mesoporous silica spheres can be regulated by adding polyvinyl alcohol. The mesoporous micro spheres prepared by the method are smooth and unstuck basically, and the addition of poly(vinyl acetate) (PVA) prevents the sticking of the micro spheres without influencing the specific surface area and mesoporous aperture obviously.

The invention provides a steel wool-resistant high-hardness ultraviolet (UV) radiation cured coating, and preparation and using methods thereof. The coating comprises the following components in part by weight: 25 to 35 parts of six-functional group aliphatic series polyurethane acrylic resin, 25 to 35 parts of six-functional group silicon modified polyurethane acrylic resin, 5 to 10 parts of trimethylolpropane trimethacrylate, 1 to 2 parts of polyether modified polydimethylsiloxane, 1 to 2 parts of diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide, 2 to 6 parts of 1-hydroxycyclohexyl phenyl ketone, and 10 to 22 parts of solvent. The coating is prepared to overcome the defects in the conventional UV cured coating, and is particularly suitable for high-hardness coating which is required by plastic keys such as acrylonitrile-butadiene-styre (ABS) keys, poly carbonate (PC) keys and the like, and can widely applied to coating of various plastic parts of communication, computer and consumer (3C) products, and digital products; and the high requirement of the UV coating is met.

The invention discloses a method for preparing antioxidant 1,3,5-trimethyl-2,4,6-tri(3,5-di-tert-butyl-4-hydroxybenzyl)benzene by using solid superacid as catalyst, wherein 1,3,5-trihalo methyl-2,4,6-trimethyl benzene and 2,6-do-tert-butylphenol, as raw materials, are subject to alkylation in inert solvent under the action of solid superacid-type catalyst SO42-/MXOY, so as to prepare target products. The method simplifies operating process, achieves mild reaction conditions, has the characteristics of easy separation of products, good reusability of the catalyst, small environmental pollutionand the like, and is suitable for industrial production.

The invention provides a bowl-shaped carbon material and a preparation method thereof, and point-line-plane three-phase composite conductive paste. The preparation method of the bowl-shaped carbon material comprises the steps of (1) adding a block copolymer F127 and dopamine hydrochloride into a mixed solution of deionized water and ethyl alcohol in sequence, and next, dropwise adding trimethylbenzene thereto to obtain a mixed solution A; adding ammonium hydroxide to the mixed solution A in a stirring condition, and performing continuous stirring to obtain a mixed solution B; washing the mixedsolution B by the mixed solution of deionized water and ethyl alcohol to remove the block copolymer F127, and performing filtering to obtain polydopamine granules; (2) uniformly dispersing the polydopamine granules into the mixed solution of deionized water and ethyl alcohol, and performing a hydrothermal reaction in a sealing condition; and (3) performing calcining treatment on the product obtained in the hydrothermal reaction in inert atmosphere. The invention also provides the point-line-plane three-phase composite conductive paste comprising the bowl-shaped carbon material; and when the paste is used as the conductive agent of the battery, the battery performance can be improved effectively.

The invention relates to high-adhesion high-gloss black UV inkjet ink which comprises, by weight, 10-20 parts of black color paste, 10-20 parts of polyurethane acrylate resin, 50-70 parts of reactivediluents, 6-10 parts of photoinitiator and 3-4 parts of auxiliaries. The reactive diluents include, by mass part, a first reactive diluent, a second reactive diluent and a third reactive diluent according to a consumption ratio of 2-3:1-2:2-3; the photoinitiator is at least one of 1-hydroxy-cyclohexylbenzophenone, 2, 4, 6-trimethylbenzoyl-diphenyl phosphine oxide and 2, 4, 6-trimethylbenzoyl ethylphenyl phosphoinate; the auxiliaries include defoamer, leveling agent, adhesion accelerant and polymerization retarder. The invention provides a preparation method and application of the high-adhesion high-gloss black UV inkjet ink. The black UV inkjet ink has the advantages of high gloss value, high adhesion and high hardness.

The invention discloses a preparation method of phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide as an efficient free radical photoinitiator. The preparation method of phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide comprises the concrete steps of with 2,4,6-trimethylbenzaldehyde as a raw material, enabling 2,4,6-trimethylbenzaldehyde and phenylphosphine oxide to be subjected to condensation reaction in the existence of a catalyst, and then, carrying out oxidation reaction. Extraction and solvent replacement are not needed and continuous reaction can be realized in the reaction process. The preparation method of phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide, disclosed by the invention, is low in price, environment-friendly, easy to operate and suitable for realizing industrialization.

The invention discloses a production technique of high-quality trimethyl orthoacetate, which comprises the following steps: in the presence of solvent unsym-trimethyl benzene, carrying out salification reaction on acetonitrile, methanol and chlorine hydride to prepare ethyleneimine methyl ether hydrochloride; putting the ethyleneimine methyl ether hydrochloride in a methanol solution, and dropwisely adding an ammonia methanol solution to regulate the pH value; carrying out alcoholysis reaction to obtain a trimethyl orthoacetate crude product; filtering to remove and recycle solid ammonium chloride; adsorbing the filtrate with a strongly alkaline macroporous ion-exchange resin to remove chlorine ions; and finally, carrying out continuous rectification to obtain the trimethyl orthoacetate product of which the content is greater than 99.5% and the yield is greater than 85%. The invention has the advantages of simple technique and high product stability and reliability; and since the used unsym-trimethyl benzene solvent has low toxicity, the trimethyl orthoacetate is safe to use.

The invention provides a low-temperature fast-dry amino automobile chassis paint and a production method thereof, wherein, the paint consists of B-12 resin, medium pigment carbon black, compound ferrotitanium powder, ultra-fine mica powder, an auxiliary agent, sealed paratoluenesulfonic acid BYK-450 and BR-167 amino resin; B-12 resin is prepared by octadecenoic acid, benzoic acid, pentaerythritol, phthalic anhydride, dimethylol propionic acid, and trimethyl benzene. The automobile chassis paint adopts special B-12 resin synthetic route to lead the polymer chain to have more active functional groups simultaneously to be matched with the blocked paratoluenesulfonic acid, reduces the baking temperature of the existing amino paint from 130 DEG C to 90 DEG C and reduces the curing film-forming time from 1 hour to half an hour. As the paint film has high crosslinking density, compound ferrotitanium powder and squamous anti-rust pigment are matched for use, and the polyaniline is used for improving the anticorrosive potentials, thus leading the salt spray resistance of the paint to achieve 150 hours and improving the protection performance and the coating efficiency.

The present invention relates to serial trimethyl benzene separating apparatus and method. The serial trimethyl benzene separating apparatus includes a pre-separating tower, a sym-trimethyl benzene tower and an unsym-trimethyl benzene tower, and features the condensator on the pre-separating tower connected to the outlet of the pre-separating tower, the reflux accumulator connected to the condensator and one vacuum unit, the reboiler in the bottom of the pre-separating tower connected between the outlet and the inlet of the sym-trimethyl benzene tower. The present invention adopts a serial three-tower process, can produce unsym-trimethyl benzene in purity over 99 % and sym-trimethyl benzene in purity over 35 % simultaneously in the yield over 90 % and power consumption 30 %-40 % lower than one normal pressure process.

Process for the preparation of 2,3,5-trimethyl-p-benzoquinone by oxidizing 2,3,5-trimethylphenol or 2,3,6-trimethylphenol with oxygen or an oxygen-containing gas mixture in the presence of a catalyst system which can be a copper halide and a transition metal halide; for example iron, chromium, manganese, cobalt, nickel, zinc or a rare earth halide, in a two-phase reaction medium, at elevated temperature.

The invention provides a synthesis method for ultraviolet photoinitiator XBPO, which comprises the following steps of: putting sodium hydride and solvent benzene into a stirring reaction kettle, dropwise adding dichlorophenyl phosphine, putting catalyst organic base, dropwise adding 2, 4, 6-trimethyl benzoyl chloride, slowly dropwise adding pure water, slowly dropwise adding oxidant, dropwise adding 2% sodium hydroxide, washing with water, concentrating, crystallizing, filtering, and drying to obtain the ultraviolet photoinitiator. The synthesis method has the advantages that the photolytic product of the ultraviolet photoinitiator XBPO has two trimethyl benzoyl chloride and one phenyl phosphine acyl free radical, which are higher in initiation activity, compared with the photo initiation activity of TPO. The wide wave band has light sensitivity, so that the GR-XBPO not only can be independently used, but also can be used in cooperation with the other ultraviolet absorbers.

The invention discloses a synthetic method of photoinitiator dual (2, 4, 6-trimethylbenzene formyl group) phenyl phosphine oxide. The synthetic method comprises processes of using dichlorophenylphosphine and 2, 4, 6-trimethylbenzene acyl chloride to serve as raw materials, conducting a classification reaction under protection of nitrogen to generate dual(2, 4, 6-trimethylbenzene formyl group) phenyl phosphine, oxidizing hydrogen peroxide to obtain a target object-dual (2, 4, 6-trimethylbenzene formyl group) phenyl phosphine oxide. Compared with the existing industrial production, the process has the advantages of being safe in operation process, free of needs of dangerous metallic sodium or potassium, free of needs of using inflammable midbody phenyl phosphine, simple in reaction process, safe, easy to control, high in obtained product yield, good in quality and prone to achieve mass production and the like.

The invention relates to the technical field of catalytic hydrogenation and particularly discloses a preparation method of a saturated hydrogenation Pd catalyst and a method for catalyzing the hydrogenation of polystyrene by virtue of the saturated hydrogenation Pd catalyst. The preparation method is characterized by comprising the following steps: with P123 as a template, ethyl orthosilicate as a silicon source and 1,3,5-trimethylbenzene and ammonium fluoride as pore-enlarging agents, synthesizing by virtue of a hydrothermal method under an acidic condition, drying, and roasting, so as to obtain a powdery MCF material; calculating the mass of palladium metal salt according to a proportion that palladium is 1.0wt%-8.0wt% of the powdery MCF material, and dissolving the palladium metal salt, so as to prepare steeping liquid; and steeping the powdery MCF material into the steeping liquid, drying, roasting, and carrying out formation and sieving, so as to obtain a catalyst product. The preparation method has the beneficial effects that the steps are simple, and the catalyst is prepared from Pd as a main catalysis element as well as home-made MCF which has a relatively large specific surface, an adjustable super-large mesoporous and a three-dimensional penetrated pore system, so that the PS hydrogenation conversion rate is substantially increased.

The invention discloses a preparation method of an efficient free radical photoinitiator phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide. Specifically, phenyl phosphine is used as a raw material and reacts with 2,4,6-trimethylbenzoyl chloride under the effect of an alkaline compound to obtain an intermediate; and through an oxidation reaction of the intermediate, the phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide is obtained. The preparation method disclosed by the invention is cheap, easy to operate, high in yield, environmentally friendly and suitable for industrialization.

The invention discloses a continuous production method of trimellitic acid. The method comprises the following processes of premixing, oxidation, coarse crystallization, filtration and recrystallization, which are sequentially performed, and comprises the following specific processes of (1) performing premixing: mixing raw materials namely unsym-trimethyl benzene, a solvent namely acetic acid, main catalysts namely cobalt acetate and manganese acetate, and a cocatalyst namely tetrabromoethane, and performing preheating to 60-120 DEG C, wherein the mass ratio of the unsym-trimethyl benzene to the acetic acid is 1 to (2-10); (2) performing oxidation: performing 2-4 continuous oxidation stages which are in series connection, and enabling the reaction temperature of the later oxidation stage to be higher than that of the previous oxidation stage; (3) performing coarse crystallization: performing coarse crystallization and then performing centrifugal separation; (4) performing filtration: dissolving crude trimellitic acid in water of 80-100 DEG C, controlling the percentage by mass of the trimellitic acid to be 15-35%, and filtering a hot solution when the solution is still hot; and (5) performing recrystallization: performing recrystallization and then performing centrifugal separation. According to the method disclosed by the invention, the trimellitic acid products with high conversion rate, high yield and high purity can be obtained.

The invention provides a high temperature resistant optical fiber and a preparation method thereof. The high temperature resistant optical fiber comprises an optical fiber core layer, a cladding layerand a double-layer coating, wherein, the coating material of an inner coating is composed of an acrylate oligomer, 2-hydroxyl-2-methyl propiophenone, vinyl tri(2-methoxy ethoxyl) silane and (2,4,6-trimethyl benzoyl)diphenyl phosphine xide; an outer coating is a high temperature resistant acrylic resin outer coating. The high temperature resistant optical fiber still maintains the reliability of optical transmission at a high temperature environment of 150DEG C for a long time, optical fiber coating has no aging phenomena of yellowing and blackening. The method is simple. The optical fiber transmission loss of the high temperature resistant optical fiber prepared at the wiredrawing speed of 2000-2200m/min, the attenuation value of the optical fiber at 1550nm is not more than 0.25dB/km, theadditional attenuation value of the optical fiber at environment of 150DEG C for a long time is not more than 0.05dB/km.

The invention provides a preparation method of nitrogen-doped graphene quantum dots (N-GQDs). The method comprises the following steps: A), mixing a carbon and nitrogen source, trimethylbenzene, sulfuric acid and ethanol and then injecting into ordered mesoporous silicon dioxide; heating for 2 to 8 hours at a temperature of 60 to 100 DEG C, carrying out reaction for 3 to 10 hours at a temperature of 120 to 180 DEG C, and then heating for 1 to 5 hours under a nitrogen atmosphere of 700 to 1000 DEG C to obtain a mesoporous carbon/nitrogen/silicon dioxide nano-compound, wherein the carbon and nitrogen source is pyrrole or quinoline; B) carrying out reaction on the carbon/nitrogen/silicon dioxide nano-compound in concentrated nitric acid steam to obtain the nitrogen-doped graphene quantum dots. The invention also provides a detection method of ascorbic acid. An experimental result proves that the obtained N-GQDs prepared by the method have uniform particle size, are narrower in distribution, have good dispersibility and have preferable water solubility. By using the N-GQDs as fluorescent probes, the N-GQDs have good selectivity on ascorbic acid and have good accuracy.