174 results about "N-Propyl alcohol" patented technology

The invention discloses a method for continuously extracting, rectifying and separating mixed alcohols from water, relates to a chemical separating method, and in particular to a method for continuously extracting, rectifying and separating mixed alcohols such as aqueous mixtures of ethanol, n-propyl alcohol, isobutyl alcohol and the like. According to the method, extractive distillation and common rectifying are combined together, and a multi-column combined step-by-step separating method is adopted to separate mixed alcohols from water step by step and recycle components with high purity. The method comprises steps of: with ethylene glycol as an extraction agent, separating the mixed alcohols from water in an extractive rectifying column B1, wherein the column B1 adopts normal pressure rectification, the reflux ratio is 1:1-10:1, the mixed alcohols can be get from the column top, and a mixture of a solvent and water can be get from the column bottom; recovering most of the solvent from a solvent recovering column B4 and recycling the solvent; and effectively separating the mixed alcohols through columns B2 and B3. According to the method, extractive distillation and common rectifying are combined together, the extraction agent is used to avoid the azeotrope of alcohols and water, and continuous separation of multiple columns are adopted to recover the components with high purity step by step, so that the method has high economic and environmental benefits.

The invention provides a preparation method of a proton exchange film fuel cell film electrode. Pt/C catalyst layers are coated on two sides of a proton exchange film respectively to obtain a CCM filmsemi-finished product, and anti-reverse pole slurry layers are coated on peripheral edges of anode surfaces of the CCM film semi-finished product; the preparation process of the anti-reverse pole slurry specifically comprises steps of adding an antipole substance into deionized water, uniformly mixing the mixture to form mixed solution, adding mixed solution of organic solvent and proton exchangefilm resin solution into the mixed solution, and uniformly mixing the mixture to obtain anti-reverse pole slurry; the solid content of the anti-reverse pole slurry is controlled to be 1-4%, the anti-reverse pole substance is one or more of iridium, rubidium, tin, cobalt metal and metal oxide thereof, and the organic solvent is one or more of ethanol, isopropanol, tert-butyl alcohol and n-propyl alcohol. The method is simple in process, can reduce the probability of occurrence of a reverse pole phenomenon of a fuel cell in the operation process, and reduces a perforation phenomenon.

The invention relates to Saccharopolyspora and a method for producing erythromycin by fermenting the Saccharopolyspora. The depositary institution of Saccharopolyspora erythraea HD03 is the common microbe center of China microbial culture preservation commission; the preservation code is GMCC No.2916; the method comprises the following specific steps that: a block with area of 1 cm*1 cm or a glycerin tube is dug from the preservation bevel and is inoculated into a sterilized seed culture medium; the temperature is between 32 and 34 DEG C; the rotational speed of a rocking bed is between 220 and 240 revolutions/minute; the time for cultivation is between 44 and 48 hours; subsequently, the block or the glycerin with 3 to 10 percent of inoculation amount is inoculated in a sterilized fermentation medium; the temperature is between 32 and 34 DEG C; the rotational speed of the rocking bed is between 220 and 240 revolutions/minute; the time for cultivation is 6 to 7 days; n-propyl alcohol as a precursor is added into the fermentation medium at 20 to 24 hours; and at late stage of fermentation, a methylation reagent and a hydroxylation reagent are added into the fermentation medium to obtain the erythromycin. The method has the advantages that: in the fermentation process, the addition of the methylation reagent and the hydroxylation reagent improves the methylation action and the hydroxylation action of the precursor in the process of synthesizing the erythromycin, reduces the accumulation of byproducts and improves the yield of main products.

The invention relates to a technological method for preparing 1, 3-propylene glycol by adopting glycerin and hydrogen. A catalyst is Pt/B2O3-WO3-ZrO2, and the mass ratio of elements of Pt, B, W and Zr is (1-4): (0.1-2): 10: (58-65); and glycerin and hydrogen are fed into a fixed bed reactor simultaneously and react at the temperature ranging from 100 DEG C to 150 DEG C under the pressure ranging from 2 MPa to 5 MPa, the resultants of reaction are subjected to gas-liquid separation, water in a liquid-phase product is separated and removed by a pervaporation membrane, a rectifying tower is used for separation, 1,3-propylene glycol, by-products containing 1,2-propylene glycol, normal propyl alcohol and isopropyl alcohol and non-converted glycerin are obtained, glycerin and a part of the by-products are circularly returned to the reactor, and the mass ratio of the circulation volume of the by-products to feeding glycerin is 0.25-1.5. According to the technological method, the reaction condition is temperate, the producing speed of 1, 3-propylene glycol is high, and 1, 3-propylene glycol can be prepared stably.

The invention discloses a COF (covalent organic framework) coated separator as well as a preparation method and an application thereof. The method comprises the following steps: firstly, synthesizingTPB-DMTP-COF, then sufficiently mixing the TPB-DMTP-COF, conductive carbon black and a water-based binder in the mass ratio being 6:2:2, dropwise adding 2-3 ml of an n-propyl alcohol aqueous solutioncontaining n-propyl alcohol and water in a volume ratio being 3:1, uniformly mixing the substances, applying the obtained mixture to a ceramic separator, and drying the separator in a vacuum drying oven at 55 DEG C to obtain the TPB-DMTP-COF coated separator by baking. The separator can effectively inhibit a shuttle effect and be prevented from being pierced by lithium dendrites when applied to alithium-selenium sulfide battery, cyclic stability and specific capacity of the battery are improved, the capacity can still be kept at 690 mAh/g after 100 cycles under the current density of 0.5C (1C=1124 mAh/g), electrochemical performance of the battery is improved greatly, and the preparation method adopts a simple process and is high in applicability.

The invention relates to a refining method and device for n-propyl acetate esterification synthesis. The refining method comprises the following steps: feeding a crude product obtained in an n-propyl acetate reaction section into an esterification tower, performing preliminary separation on the n-propyl acetate in the esterification tower through a rectifying mode, and evaporating out raw ester consisting of the n-propyl acetate, water and part of n-propyl alcohol from the tower top of the esterification tower; after condensing the raw ester through a tower-top condenser, feeding the condensed raw ester into a tower-top layering machine for layering, refluxing a lower-layer water-phase part to an esterification tower, completely extracting and feeding an upper-layer organic phase into a pervaporation membrane separator to perform separation, so as to obtain dehydrated raw ester; enabling water and a little n-propyl acetate in a solution at a feed liquid side to penetrate through the pervaporation membrane in the form of steam, so as to obtain a penetrating fluid, and returning the penetrating fluid to tower-top layering machine of the esterification tower and discharging the layered penetrating fluid from the water phase; re-feeding the dehydrated raw ester into a refining tower to obtain a n-propyl acetate finished product. According to the refining method, the recovery rate is high, the process is simple, the safety coefficient is high, the feed liquid circulation volume is small, the operation energy consumption is low, and a third component is not added.

The invention discloses gravure printing ink for a poly(ethylene terephthalate) (PET) base material and a preparation method for the gravure printing ink, and aims to provide ink having the advantages of good fluidity, high adhesion, high gloss, simple and feasible preparation method, safe use and environment friendliness, and a preparation method thereof. The ink comprises the following components: an organic pigment or an inorganic pigment, resin, an adhesion promoter, a dispersing agent and the balance of organic mixed solvent. The ink is prepared by the following steps of: mixing dimethyl carbonate, ethyl acetate and n-propyl alcohol to obtain a mixed solvent, and dissolving the resin; and mixing with the organic pigment or the inorganic pigment, stirring and dispersing to obtain a semi-finished product of color paste, fully grinding on a sand mill, adding the adhesion promoter and the dispersing agent, fully stirring, and filtering off components of which the fineness is more than 15mu m by using a filtering machine to obtain the gravure printing ink for the PET base material.

The present invention provides a composition for water-removable ink with an effect of coupling retardation by using an aliphatic alcohol as a solvent, which is selected from a group comprising n-butyl alcohol, n-propyl alcohol, isopropyl alcohol and pentanol, so that the curiosity of infants or juveniles can be stimulated to enhance the learning effect and also various desires of students or adults can be satisfied in terms of ornamental purposes.

The invention discloses a method for removing and enriching ginkgolic acid from ginkgo biloba extract. The method comprises the following steps: carrying out column filling by taking a molecularly imprinted polymer of ginkgolic acid as column chromatography packing; then filling the column with a ginkgo biloba extracting solution; leaching the column with a mixed solution of cyclohexane and ethyl alcohol in a volume ratio of 10 to 1; finally, eluting the chromatographic column with alcohol so as to obtain an effluent, namely ginkgolic acid, wherein the alcohol can be of ethyl alcohol, isopropanol, n-propyl alcohol or n-butyl alcohol. A molecular imprinting technique is applied to the removal of ginkgolic acid during ginkgo biloba processing for the first time, so that compared with the traditional ginkgolic acid removal method, according to the method disclosed by the invention, ginkgolic acid with high purity is prepared while ginkgolic acid is removed by virtue of the directional enrichment effect of the molecularly imprinted-solid phase extraction column, thereby providing the source of a raw material for clinical pharmacological research on ginkgolic acid.

The invention relates to an environment-friendly cleaning agent. The environment-friendly cleaning agent comprises the raw materials of, by amount, 94%-95% of n-propyl bromide, 3%-4% of n-propyl alcohol, 0.2% of nitromethane, 0.8% of 1,3-dioxolame, 0.7% of epoxybutane and 0.3% of BHT. The cleaning agent has the advantages of low ozone destructive index, low earth warming effect, good environment-friendly effect, high penetration, easily cleaning capacity for micro-porous materials, fast drying speed, low hydrolysis degree, stable gas-liquid phase change, etc. The cleaning agent can be used for steam washing and distillation recovery.

The invention relates to a synthesis technique for high-purity C*S mineral, water is added into ethyl orthosilicate for hydrolysis, n-propyl alcohol and Ca(No3)2 aqueous solution are mixed with hydrolyzed ethyl orthosilicate to form even solution, under the action of nitric acid as a catalyst, the solution is stirred and reacted to obtain sol, and gel is gradually formed and then calcined to obtain C3S mineral after evaporation drying. The C3S mineral, which is synthesized by using the inventive technique, can be found in X-ray diffraction pattern by means of diffraction analysis of X-ray that the characteristic peak of C3S is extremely obvious and peak strength is high, but the characteristic peak of C2S and f-CaO is quite weak and unobvious. Therefore, the C3S mineral which is synthesized by using the inventive technique has high purity. By comparing standard powder diffraction fiche (PDF fiche), it is found that the resultant high-purity C3S phase is the closest to a monoclinic system.

The present invention relates to a high-temperature organic acid corrosion inhibitor for inhibiting refinery vacuum tower high-temperature naphthenic acid corrosion environment with 200-400deg.C. Its composition includes (by wt%) 10-60% of corrosion inhibitor intermediate obtained by using boric acid and organic amine according to the mole ratio of 1:0.5-3 through a certain reaction process, 20-80% of monohydric alcohol or dihydric alcohol solvent formed from one kind and two kinds of methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, butyl alcohol, isobutyl alcohol, 1,2-propylene glycol, n-amyl alcohol, n-heptyl alcohol and n-caprylic alcohol or combination of more than two kinds of above-mentioned components and 0.1-20% of corrosion inhibition film-forming component formed from one kind or any two kinds of sulfourea, benzyl chloride, alkylene sulfide, propiolic alcohol, trisodium phosphate, ammonium phosphosulfate, diammonium phosphate, triammonium phosphate and benzotriazole or combination of more than two kind of above-mentioned all the components.

The invention discloses a detection method of residual stress, and particularly relates to detection on a plastics product. The detection method comprises the steps of immersing a product to be detected in a corrosion solution, and taking the product to be detected out and detecting whether a residual stress reaction occurs when the immersing time reaches an immersing time set value, wherein if the residual stress reaction does not occur, the product to be detected is qualified. The corrosion solution can be prepared by mixing carbon tetrachloride and normal octane according to the volume ratio of 1:1, or by mixing methylbenzene and normal propyl alcohol according to the volume ratio of 1:3; the immersing time is obtained by processing immersing time within which the stress reaction occurs during pre-detection on products in the same batch, and under the residual stress reaction, the surface of a plastic product cracks or powdery particulate materials are formed on the surface of the plastic product due to corrosion.

The invention discloses a preparation method of a fluorine-doped lamellar black titanium dioxide nano material and belongs to the technical field of nano materials. The preparation method comprises the steps of 1) preparing a mixture system of tetrabutyl titanate, n-propyl alcohol and hydrofluoric acid and stirring the system for a certain time; 2) moving the mixed solution to a high-pressure reaction kettle and performing a reaction for a certain time at a certain temperature; 3) washing and drying a reaction product, and heating the reaction product under a protective atmosphere for a certain time to prepare the fluorine-doped lamellar black titanium dioxide nano material. The fluorine-doped lamellar black titanium dioxide nano material, compared with titanium dioxide P25 which has been commercially produced, is more excellent in photo-absorption and electron transmission performances.

Irritant-free gel compositions according to the present invention include less than 5 parts by weight of one or more marking agents, 0.25-2 parts by weight of a thickening agent; and 30-90 parts by weight water. The thickening agent is typically a vegetable gum. In some embodiments, the compositions may additionally include 20-60 parts by weight of at least one water-miscible solvent, such as monohydric alcohols, polyhydric alcohols and mixtures thereof. The water-miscible solvent may be methyl alcohol, ethyl alcohol, isopropyl alcohol, n-propyl alcohol, ethylene glycol, propylene glycol or a mixture thereof, and preferably a mixture of isopropyl alcohol and propylene glycol.

The invention discloses an iminazole type ionic liquid reversed phase electrochromatography organic monolithic column. A monolithic stationary phase is a porous continuous bed formed by in situ polymerization of neutral compound and ionic compound monomer; the neutral compound is methacrylic acid dodecyl ester and dimethyl crylic acid ethyl diester, the ionic compound monomer is 1-allyl-3-methylimidazole phosphate ionic liquid, the pore-forming agent is one or more of methyl alcohol, methylbenzene, normal propyl alcohol, cyclohexanol, capryl alcohol, 1,4-butanediol and ethylene glycol, and the initiator is azodiisobutyronitrile. The iminazole type ionic liquid reversed phase electrochromatography organic monolithic column provided by the invention not only has typical reversed phase chromatographic performance, but also can provide ion exchange groups and generate higher electroosmotic flow, change polymerization quantity of ionic liquid and change the size of the electroosmotic flow. The stationary phase of the monolithic column can meet the requirement on rapid separation of polar compound, neutral compound and alkali compound.

The invention provides a synthetic method of drug lamotrigine for curing bipolar disorder and epilepsy. 2-cyano-(2, 3-dichlorophenyl)-2-guanidine amino acetonitrile and n-propyl alcohol (CH3CH2CH2OH) solvent are used as a raw material, and the lamotrigine is generated through one-step cyclization reaction in a reaction tank. The synthetic method of the drug lamotrigine includes material preparation, crude product manufacturing, purification, filtration and drying. The raw material of the synthetic method comprises only the 2-cyano-(2, 3-dichlorophenyl)-2-guanidine amino acetonitrile as a starting material and the n-propyl alcohol (CH3CH2CH2OH) solvent and has no strong acid, strong base and other toxic substances, the lamotrigine is manufactured through the one-step cyclization reaction, and therefore the synthetic method is small in reaction steps, high in yield, simple and convenient to operate and high in raw material utilization rate, avoids using toxic and harmful substances in abundance, reduces production cost remarkably, and has high social benefits and social benefits.

The invention relates to a methanol gasoline which comprises 70-80% of methanol, 10-20% of ethanol, 2-5% of n-propyl alcohol, 5-10% of n-butyl alcohol, 2-5% of isopropyl alcohol, 0.05g/ L of tert-butyl acetate and 0.016g/ L of ferrocene. A production method of the methanol gasoline comprises the following steps of: adding the raw materials into a reaction cylinder in proportion, stirring for 0.5-1h at room temperature by an explosion-proof rod, and standing still for 1h. When in use, the methanol gasoline is mixed with 93# gasoline according to the volume ratio of 1: 1 for use. The methanol gasoline is low in cost and environment-friendly, and reaches the performances and indexes of the 93# standard gasoline, thus having a good market prospect.

The invention discloses a method of determining content of methanol, isobutanol, and isoamylol of alcohol, and relates to methods of determining alcohols. The method of determining the content of the methanol, the isobutanol and the isoamyol of the alcohol comprises steps as below sequentially: (1) alcohol sample pretreatment processing steps: moving sample alcohol into a volumetric flask, adding interior label solution into the volumetric flask, using absolute ethanol to dilute the solution to a constant volume measured by scales, blending the solution to be used as the solution to be tested; (2) blank experiment: adding no samples, and repeating the step (1); (3) carrying out combination analysis of gas chromatography-mass spectra analysis of the samples and the blank sample. The method of determining the content of the methanol, the isobutanol, and the isomylol of the alcohol achieves accurate precise quantification analysis of the content of the methanol, the normal propyl alcohol, the isobutanol and the isoamylol of the alcohol through method improvement and replacing of detectors. The method of determining the content of the methanol, the isobutanol and the isoamylol of the alcohol is simple to operate and fast and accurate.

The invention relates to a heat exchange medium which is prepared from the following raw materials according to the weight ratio: 20-40 parts of absolute methyl alcohol, 50-70 parts of absolute ethanol and 10-20 parts of absolute n-propyl alcohol. The absolute methyl alcohol, the absolute ethanol and the absolute n-propyl alcohol are mixed as the heat exchange medium. A heat conduction pipe usingthe heat exchange medium comprises a heat dissipation outer pipe, a heat dissipation inner pipe and a heat exchange medium, wherein the heat dissipation inner pipe is arranged in the heat dissipationouter pipe, and the heat exchange medium is filled between the heat dissipation outer pipe and the heat dissipation inner pipe. Therefore, the heat conduction pipe having the advantages of energy saving, environmental protection and convenient installation is provided.

The invention discloses a device and a method for producing normal propyl alcohol by utilizing carbon dioxide. The carbon dioxide is adopted as a raw material; the device comprises a raw material mixing unit, a buffer unit, a reaction unit, a waste heat recovery unit, a rapid cooling unit, a compression unit, a separation unit, a PSA unit, a normal propanal production unit and a normal propyl alcohol production unit; the carbon dioxide is utilized for preparing ethylene, carbon monoxide and hydrogen, and the products are used as material supply for downstream normal propanal and normal propyl alcohol production; exhaust gas produced by the process is used as a fuel for evaporate steam, so that not only is the energy consumption requirement of the device met, but also the steam resource is saved, the maximum cyclic utilization of energy is realized, the pollutant emission is reduced, and the environment protection requirement is met; the follow-up process provides the raw material hydrogen for the previous process, so that the conversion rate of the materials is improved, the atmosphere pollution and the energy waste are avoided; the source problem of ethylene, hydrogen and carbon monoxide raw materials for a downstream device is solved, the product diversification of the enterprise is perfected, and the core competence of the enterprise is improved.