31 results about "1-Methylnaphthalene" patented technology

The invention discloses a production method of a high-strength coal series isotropic asphalt base carbon fiber. The production method comprises the following steps: taking ashless coal as an asphalt precursor, removing volatile components of the ashless coal by adopting a thin layer evaporation method, and controlling a softening point of asphalt at a temperature of 180 to 260 DEG C to obtain spinning alphalt; then obtaining a carbon fiber by a melt spinning technology, a preoxidizing technology, a carbonization technology and the like; mixing coal with 1-methylnaphthalene according to the ratio of 1-2 to 1-10, carrying out solvent extraction reaction at the temperature of 350 to 410 DEG C and the pressure of 1 to 5MPa, and then carrying out solid-liquid separation, hot press filtering andsolvent recovery to obtain the ashless coal; finally, preparing the carbon fiber of the ashless coal by the melt spinning technology, the preoxidizing technology, the carbonization technology and thelike. According to the production method disclosed by the invention, coal is used as a raw material for producing a general asphalt base carbon fiber with excellent performance indexes; tensile strength of the general asphalt base carbon fiber is as high as 1500MPa; the general asphalt base carbon fiber has a broader market prospect and economic benefits.

The invention discloses a method for extracting naphthalene, 1-methylnaphthalene and 2-methylnaphthalene from ethylene tar. The method comprises the following steps of: adding ethylene cracking tar with the total content of naphthalene and methylnaphthalene of not less than 30 percent from the middle of a first rectifying tower (5) under certain conditions; recovering materials of which light components are removed by the first rectifying tower at the bottom of the tower; adding from the middle of a second rectifying tower (10), and obtaining the naphthalene with the purity of not less than 95 percent on the top of the tower; adding the materials of which the naphthalene is removed at the bottom of the second rectifying tower from the middle of a third rectifying tower (15), and removing tetramethyl benzene and other components of which the boiling point is lower than that of the 2-methylnaphthalene at the top of the tower; recovering the materials of which the light fraction is removed by the third rectifying tower at the bottom of the tower, adding from the middle of a fourth rectifying tower (20), and obtaining the 2-methylnaphthalene with the purity of not less than 98 percenton the top of the tower; and recovering the materials of which the 2-methylnaphthalene is removed by the fourth rectifying tower at the bottom of the tower, adding from the middle of a fifth rectifying tower (25), and obtaining the 1-methylnaphthalene with the purity of not less than 98 percent. By the method, wastewater and waste residue are not generated and extraction efficiency is high.

The method of extracting 1-methyl naphthalene and 2-methyl naphthalene from tar includes adopting the production apparatus comprising one alkylating polymerization reactor and three serially connected rectification towers, and the production process, which comprises the alkylating polymerization reaction of material with methyl naphthalene content not lower than 60 %, solid acid and / or liquid acid catalyst and alkylation agent in 70-90 deg.c and 95-115 deg.c separately; the separation of the alkylating polymerization product in the first rectification tower to eliminate light distillation fraction from the tower top; the further separation in the second rectification tower to obtain 2-methyl naphthalene of 95 % over purity from the tower top; and the further separation in the third rectification tower to obtain 1-methyl naphthalene of 95 % over purity from the tower top. The present invention makes it possible to treat both tar scrubbing oil and coal tar scrubbing oil in the same apparatus.

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.

The invention discloses a method for synthesizing menaphthyl tetrahydrofuryl ethyl malonate as shown in a formula (I). The synthesis method is as follows: sodium alkoxide is added into a 2-methyl tetrahydrofuran solution of the menaphthyl tetrahydrofuryl ethyl malonate as shown in a formula (II) in batch at a temperature of between 20 and 45 DEG C; after addition, the mixture is heated and refluxed for 0.5 to 2 hours, and 1-methylnaphthalene halide as shown in a formula (III) is slowly dripped into the mixture at a temperature of between 80 and 100 DEG C; the mixture is subjected to reflux reaction for 0.5 to 2 hours; and the menaphthyl tetrahydrofuryl ethyl malonate is obtained after after-treatment of a reaction liquid. Compared with the prior art, the method has the advantages that themenaphthyl tetrahydrofuryl ethyl malonate adopts a green solvent, namely 2-methyl tetrahydrofuran as a reaction solvent and is also directly taken as an extracting solvent; and the method has high yield of reaction products and high recovery rate of the solvent, is environment-friendly, and has good industrial application prospect.

The invention discloses a method for simultaneously detecting content of 22 polycyclic aromatic hydrocarbon matters in cigarette smoke. The method comprises the following steps: trapping total particular matters in cigarette main stream smoke by adopting a filter; extracting the trapping filter by utilizing an extraction agent; and detecting the filtered extract liquor by adopting gas chromatography-tandem mass spectrum (GC-MS / MS), and simultaneously detecting the contents of 22 polycyclic aromatic hydrocarbon matters, including indene, naphthalene, 1-methylnaphthalene, 2-methylnaphthalene, acenaphthylene, acenaphthene, fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo [a] anthracene, chrysene, benzo [b] fluoranthene, benzo [k] fluoranthene, benzo [j] fluoranthene, benzo [e] pyrene, benzo [a] pyrene, perylene, indene [1,2,3-cd] perylene, dibenzo [a, h] anthracene, benzo [g, h, i] pyrene, and the like, in cigarette main stream smoke. The method fills the blank of the prior art, has the characteristics of simple, convenient and quick sample pretreatment, high detection accuracy and repeatability and large analysis test flux and is fit for quick analysis of mass samples.

The invention discloses a method for reducing the content of impurities in 2-methylnaphthalene. 2-methylnaphthalene which is extracted from coal tar and has the content not lower than 96 percent is used as the raw material. A melt crystallization method is adopted, and the method comprises the following steps: (1) adding the 2-methylnaphthalene raw material in a crystallizer, and gradually raising the temperature of the 2-methylnaphthalene raw material by heating and raising the temperature of the crystallizer to 60-70 DEG C so that the 2-methylnaphthalene raw material in the crystallizer is thoroughly melted;(2) slowly lowering the temperature of the 2-methylnaphthalene raw material after the 2-methylnaphthalene raw material in the crystallizer is thoroughly melted, and cooling the crystallizer to 30-31 DEG C, wherein the whole cooling crystallization process lasts for 3-4.5h; and (3) discharging substances which are not crystallized in the crystallizer, wherein the remaining crystal is the purified 2-methylnaphthalene. The method can effectively reduce the content of such impurities as 1-methylnaphthalene, indole, 2-methyldibenzothiophene, 5-methyldibenzothiophene, and the like in the 2-methylnaphthalene, achieves higher recovery rate and is clean and environment-friendly.

The invention discloses a 1- methyl-4-[4-(N, N-p-Methyl-phenyl-amino) styryl] naphthol and the preparation method and application, which belongs to the technology field of photoelectric materials. Thestructural formula of the component refers to the drawing and the preparation process of the component comprises that: 1-methylnaphthalene reacts with paraformaldehyde and hydrochloric acid under thecatalysis of the phosphoric acid to prepare 1- methyl-4-chloromethyl naphthalene and then reacts with triethyl phosphate to prepare the wittig reagent; the produced wittig reagent reacts with 4-(N, N-2 p-Methyl-phenyl-amino) aminotenzaldehyde under the action of alkali to gain the starting material. The component mixes with bisphenol A Pc resin or bisphenol Z Pc resin to prepare the hole-transporting layer thin film of the organic photoconductor of function separated type. The invention has moderate reaction conditions and has high photosensitivity of the organic photoconductor appliance as the hole-transporting material.

The invention discloses a crude oil pour-point depressant, which is composed of methylnaphthalene. The methylnaphthalene is one of 1-methylnaphthalene' and mixed methylnaphthalene' or a mixture of 1-methylnaphthalene' and mixed methylnaphthalene' according to any proportion; or the methylnaphthalene is a mixture of 2-methylnaphthalene dissolved in 1-methylnaphthalene or mixed methylnaphthalene' under normal temperature and normal pressure, or a mixture of 2-methylnaphthalene dissolved in 1-methylnaphthalene or mixed methylnaphthalene' according to any proportion under normal temperature and normal pressure, and highest content of 2-methylnaphthalene in the mixture is less than saturation concentration of 2-methylnaphthalene in a solution under normal temperature and normal pressure. The crude oil pour-point depressant can greatly reduce the crude oil condensation points of different oil fields, can widely used for solving the crude oil pour point reduction problem of oil extraction, gathering and transportation, and storage and transportation phases of different oil fields, can reduce the crude oil pour point reduction cost, and has the beneficial effects of little toxic and side effect, high security, simple production, low cost, strong applicability, and easy popularization and application.

The invention discloses a pour point depressant for crude oil. The depressant is prepared from methylnaphthalene, wherein the methylnaphthalene is 1-methylnaphthalene, any one in mixed methylnaphthalene or a mixture of 1-methylnaphthalene and mixed methylnaphthalene in any ratio; or the methylnaphthalene is a mixture prepared from 2-methylnaphthalene dissolved in 1-methylnaphthalene or mixed methylnaphthalene at normal temperature and pressure or a mixture prepared from 2-methylnaphthalene dissolved in a mixed solution of 1-methylnaphthalene and mixed methylnaphthalene in any ratio under normal temperature and pressure, and the maximum content of the 2-methylnaphthalene in the mixture is not more than the saturation concentration of the 2-methylnaphthalene in the solution at normal temperature and pressure. The invention can greatly decrease the pour point of crude oil in different oil fields, can be widely used for solving the problem of depressing the pour point of crude oil in various phases of oil recovery, gathering and storage and transportation in different oil fields, can lower the cost for depressing the pour point of crude oil, and has the advantages of less toxic and side effects, high safety, simple production, low cost, strong applicability, easy popularization and application and the like.

The invention relates to a method for quickly pyrolyzing sludge to prepare bio-oil and a soil improver by microwave assisted catalysis. The method comprises the following steps: (1) weighing silicon carbide spherical particles and a HZSM-5 spherical catalyst in a mass ratio of 1: 1 to 1: 2, and uniformly mixing and adding the mixture into a quartz reaction kettle; (2) putting the quartz reaction kettle in a microwave splitting instrument, heating the quartz reaction kettle to 450-600 DEG C, stirring the mixture at a rate of 60-100 r / minute, gradually adding dried sludge powder into the quartz reaction kettle and condensing the generated steam to obtain a brown liquid product bio-oil, and collecting solid residues as the soil improver. The method provided by the invention is simple in process and quick to split, and the obtained split fuel is high in hydrocarbon content which can reach over 55%. The obtained split fuel comprises important chemical raw materials such as naphthalene, p-xylene, 1,3,5-trimethylbenzene, 1-methylnaphthalene, indene and the like. The obtained solid residues are very high in content of P, Ca, K and Mg and can be used as the soil improver to improve the soil fertility.

The invention relates to a cyanide-free silver plating solution additive which comprises the following components by ratio: 0.1-10g / l of brightener, 5-10g / l of leveling agent, 100-600g / l of complexing agent and the balance of plasma water, wherein the brightener is one or mixture of more in nitrogen-containing compound, triazole, benzotriazole, 2-hydroxypyridine, pyridine, 22 dipyridyl, 1, 10-phenanthroline, triethylene tetramine and diethylene triamine according to any ratio; the leveling agent is one or mixture of more in aromatic hydrocarbon compounds, naphthalene, 1-methylnaphthalene, 1, 4-naphthoquinone and 1-naphthol according to any ratio; the complexing agent is one or mixture of more in disodium ethylenediamine tetraacetate, niacin, aminosulfonic acid and potassium pyrophosphate according to any ratio. The cyanide-free silver plating solution additive has the beneficial effects that the plating solution is stable, low in toxicity and good in dispersing ability; the obtained plating layer is bright and fine as well as good in binding force; the technology adopts the environment-friendly organic additive which does not contain heavy metal and sulfide; the plating layer is good in corrosion resistance. Furthermore, the cyanide-free silver plating solution additive can be directly used for parts such as brass, copper, chemical nickel and the like, preplating is not needed, and the binding force is also guaranteed.