217 results about "Methylated naphthalene" patented technology

The invention relates to the technical field of building material, in particular to a maritime work concrete corrosion-proof additive. The maritime work concrete corrosion-proof additive consists of a calcium sulphoaluminate expansion agent, a methyl naphthalene sulphonic acid water reducing agent, organosilicon hydrophobic powder, neopentylene glycol, milled slag powder, polypropylene fibers, silicon ash, superfine fly ash and arenaceous quartz. The maritime work concrete corrosion-proof additive can reduce the water consumption for mixing concrete, improve the water retention and cohesiveness, and improve the resistance of the concrete to seawater erosion and the durability.

The invention discloses application of methylnaphthalene in lowering viscosity of thickened oil, which comprises application of 1-methylnaphthalene in lowering viscosity of thickened oil and the specific implementation steps, 2-methylnaphthalene in lowering viscosity of thickened oil and the specific implementation steps and mixed methylnaphthalene in lowering viscosity of thickened oil and the specific implementation steps. The invention enlarges the application method of methylnaphthalene, clearly demonstrates the specific application method of using methylnaphthalene to lower viscosity of thickened oil, solves the problems of great load and power consumption, frequent machinery accidents, high surface line return pressure, and the like of an oil extractor during extracting and outwards transporting thickened oil in the background art, and can effectively lower viscosity of thickened oil and reduce extraction and outward transportation cost of thickened oil.

A non-toxic biologically active compound is provided having the following general formula (I):

wherein n is an integer from 1 to 14, preferably from 2 to 4, and R is an organic moiety, preferably a group different from but structurally substantially similar to 2-methyl naphthoquinone, or a group P—C(R₁)—P, where each P stands for a—PO(OH)₂ group and R₁ is a (poly)isoprenyl group, hydroxy, halogen (preferably chloro or bromo), or hydrogen, or a pharmaceutically acceptable derivative thereof. These compounds are useful for the treatment or prevention of certain disorders in a mammal, especially a human being, for example postmenopausal loss of bone in women, juvenile or senile osteoporosis in men and women, cardiovascular calcification and other ectopic calcifications.

The invention relates to a method for synthesizing 2-methyl-1, 4-naphthoquinone through taking 2-methylnaphthalene as a raw material, which comprises the following steps of: taking the 2-methylnaphthalene as the raw material, taking glacial acetic acid as a solvent, taking hydrogen peroxide as an oxidizing agent and catalyzing with a catalyst to synthesize the 2-methyl-1, 4-naphthoquinone. The reaction temperature is 20-80 DEG C, and the dripping rate is 0.02-1 mL/min. After the end of dripping, the temperature is preserved for 0.5-4 hours. After the reaction is ended, and feed liquid is concentrated to 1/2-1/6 of the original volume, the feed liquid is poured into ice water with the volume being 3-6 times that of the feed liquid and is then stewed, filtered and dried to obtain the 2-methyl-1, 4-naphthoquinone. The method has the beneficial effects that a mixed acid catalytic system is used; compared with a traditional chromate oxidation method, the method has the advantages of good selectivity and high yield; and the pollution to a large quantity of chromium metal ions generated in the traditional industrial production can be avoided, and therefore, the industrial application value is higher.

The invention discloses a method for preparing (S)-N, N-dimethyl-3-(naphthol-1-oxygroup)-1- phenyl propyl group-1-amine. (S)-3-(naphthol-1-oxygroup)-1- phenyl propyl group-1-amine serves as the raw materials, and dimethyl carbonate replaces formaldehyde in the prior art to serve as a methylation reagent to prepare the (S)-N, N-dimethyl-3-(naphthol-1-oxygroup)-1- phenyl propyl group-1-amine. On the basis, the (S)-N, N-dimethyl-3-(naphthol-1-oxygroup)-1- phenyl propyl group-1-amine is dissolved in ethyl acetate to further prepare (S)-N, N-dimethyl-3-(naphthol-1-oxygroup)-1- phenyl propyl group-1-amine hydrochloride. The method reduces environment pollution without increasing the cost, simplifies reaction operations, reduces requirements on equipment and can be used in industrial production easily.

The invention discloses a method for determining the migration quantity of volatile organic compounds in an adhesive sticker for a food label in a water-based food simulating object. The method comprises the following steps: performing a direct or indirect migration test on the adhesive sticker for the food label through a water-based food simulating solution; sampling the water-based food simulating solution through purging and trapping; separating 10 volatile organic compounds through HP-5ms or chromatographic columns with similar properties; performing detection through a mass spectrometry detector; performing quantification through an external standard method, wherein the 10 volatile organic compounds include nonene, 2-ethylhexanol, 1,2,4,5-tetramethylbenzene, camphor, 1-dodecene, naphthalene, 2-ethylhexyl acrylate, 1-methylnaphthalene, 1-undecanol and dodecyl aldehyde. The method is accurate in test, easy to operate, high in efficiency, quick, high in sensitivity and high in practicality, is applicable to qualitative and quantitative determination on the volatile organic compounds in the adhesive sticker for the food label through a manufacturing enterprise of the adhesive sticker for the food label and relevant government supervision departments, and can be used for avoiding harm to the physical health of a consumer caused by over-large migration quantity of the volatile organic compounds.

The invention discloses a device and method for extracting acenaphthene and acenaphthylene in LCO bicyclic aromatic hydrocarbon. The device comprises an extraction rectifying tower, a regeneration tower, a crystallizing device, a washer and a sidestream rectifying tower. The method comprises the following steps: during preparation, firstly, adding a mixed liquid containing acenaphthene and acenaphthylene and an extractant from a raw material feed inlet and an extractant feed inlet of the extraction rectifying tower for extraction and rectification; feeding a fraction containing the extractantand dimethylnaphthalene into the regeneration tower for regeneration; recycling the regenerated extractant fraction to the extraction rectifying tower; feeding the fraction containing acenaphthene andacenaphthylene at the bottom of the extraction rectifying tower into the crystallizing device; adding a crystallizing solution for crystallization at the same time; feeding the obtained coarse acenaphthene into the washer; washing the coarse acenaphthene to obtain crystal acenaphthene; feeding the crystallizing mother liquor and washing agent mother liquor into the sidestream rectifying tower tobe rectified to obtain an acenaphthylene fraction; and recycling the crystallizing solvent to the crystallizing device and the washer. According to the device, the purity and the yield of acenaphtheneseparately reach 99.57% and 80.60% and the purity and the yield of acenaphthylene separately reach 98.53% and 77.59%.

The invention relates to a process method for extracting high-purity beta-methylnaphthalene from reformed aromatic hydrocarbon C10. The process method comprises the following steps of: by taking catalytically reformed by-product hydrocarbon C10 as a raw material and refined components as raw materials after carrying out rectification, freezing crystallization and refining on the catalytically reformed by-product hydrocarbon C10, putting the raw materials into a multistage countercurrent fractional crystallizer, and refining and extracting the beta-methylnaphthalene, so as to obtain the beta-methylnaphthalene with the purity high than 99%. The process method has the advantages of simple process, relatively low equipment investment and production cost, no polluted by-product and relatively high economic benefit and social benefit.

The invention relates to a preparation method of Terbinafine hydrochloride, which comprises the following steps: dissolving a certain amount of catalyst, i.e. sodium iodide (or potassium iodide) in an organic solvent, adding 1-chloro-6,6-dimethyl-2-heptylene-4-alkyne, sequentially adding alkali and N-methyl-1-naphthalene methylamine hydrochloride, carrying out condensation at 10-40 DEG C, salifying the obtained product in an alcohol system with hydrogen chloride to obtain the Terbinafine hydrochloride, and carrying out recrystallization in an alcohol/water mixed solution to obtain the qualified product. In the method, the raw materials are cheap and easily-acquired, the reaction is complete, and the reaction time is greatly shortened. Therefore, the method is completely suitable for industrialized mass production.

The invention relates to a method for purifying 4-acetyl-1-methyl naphthalene in an acetyl methyl naphthalene mixture. The melting point difference between 4-acetyl-1-methyl naphthalene and other acetyl methyl naphthalene is adopted to obtain the 4-acetyl-1-methyl naphthalene with high purity. The acetyl methyl naphthalene mixture is put into a melting crystallization device, and the temperature is reduced from normal temperature to 10-15 DEG C, a mother solution without crystallization is released, and then the crystallized solid is started to heat up and sweat from 10-15 DEG C, the sweatingtemperature is 15-37 DEG C, after the end point of sweating is reached, sweating is stopped, and sweat is discharged; and finally, the crystalline solid in the melting crystallization device is heatedand melted to obtain the 4-acetyl-1-methyl naphthalene. According to the method for purifying the 4-acetyl-1-methyl naphthalene in the acetyl methyl naphthalene mixture, under the condition of not reducing the productive rate, the 4-acetyl-1-methyl naphthalene with the purity larger than 99.0% is obtained, and the operation is easy to operate.

The invention discloses a PVC (polyvinyl chloride) elastomer and a method for preparing the same. The PVC elastomer comprises PVC, nanometer calcium carbonate, calcium stearate, zinc stearate, epoxidized soybean oil, 1, 1-methylene-2-naphthol, hydrogenated nitrile butadiene rubber, divinyl benzene, magnesium oxide, dibutyltin maleate, polypropylene glycol adipate and SMA (styrene maleic anhydride). The PVC elastomer and the method have the advantages that the PVC elastomer is high in strength, the tensile strength of the PVC elastomer is 20-60 MPa, and the Shore hardness of the PVC elastomer is 80-100 A; the PVC elastomer is good in appearance, the impact strength of the PVC elastomer is 15-35 kJ/m<2>, and the Vicat softening point of the PVC elastomer is 115-155 DEG C; the permanent compression deformation of the PVC elastomer is 15-35%, the PVC elastomer is high in elasticity, the bending strength of the PVC elastomer is 15-55 MPa, and the tear strength of the PVC elastomer is 35-55 N/mm; the PVC elastomer is excellent in weather fastness and creep resistance, low in cost and easy to operate and can be widely produced, the breaking elongation of the PVC elastomer is 450-650%, the melt flow index of the PVC elastomer is 6-10 g/10min, the water absorption of the PVC elastomer is 0.001-0.02%, and accordingly exiting materials can be continuously replaced.

The invention relates to a catalyst for one-step preparation of 2,6-dimethylnaphthalene from synthesis gas and 2-methylnaphthalene, wherein the catalyst comprises 70-95 wt% of an EU-1/ZSM-23 mixed crystal molecular sieve of a hydrogen type nanometer needle-like crystal, 5-30 wt% of a binder and an oxide auxiliary agent, and the content of the oxide auxiliary agent is 1-20 wt% of the total weight of the molecular sieve and the binder. Compared with the existing 2,6-dimethylnaphthalene catalytic synthesis technology, the application of the catalyst in the catalytic reaction for one-step preparation of 2,6-dimethylnaphthalene from synthesis gas and 2-methylnaphthalene has the following characteristics that the reaction process is short, the catalytic reaction efficiency is high, and the service life of the catalyst is long, so that the yield of 2,6-dimethylnaphthalene is effectively increased, and the synthesis cost of 2,6-dimethylnaphthalene is reduced.