236 results about "Tetrahydrofurfuryl alcohol" patented technology

An exemplary printable composition of a liquid or gel suspension of diodes comprises a plurality of diodes, a first solvent and/or a viscosity modifier. In other exemplary embodiments a second solvent is also included, and the composition has a viscosity substantially between about 100 cps and about 25,000 cps at about 25° C. In an exemplary embodiment, a composition comprises: a plurality of diodes or other two-terminal integrated circuits; one or more solvents comprising about 15% to 99.9% of any of N-propanol, isopropanol, dipropylene glycol, diethylene glycol, propylene glycol, 1-methoxy-2-propanol, N-octanol, ethanol, tetrahydrofurfuryl alcohol, cyclohexanol, and mixtures thereof; a viscosity modifier comprising about 0.10% to 2.5% methoxy propyl methylcellulose resin or hydroxy propyl methylcellulose resin or mixtures thereof; and about 0.01% to 2.5% of a plurality of substantially optically transparent and chemically inert particles having a range of sizes between about 10 to about 50 microns.

A stripping composition comprising at least one of alcohols having an ether-bond in the molecule thereof as component (a), and an anticorrosive as component (b). Furfuryl alcohol or tetrahydrofurfuryl alcohol is preferable as component (a).

The invention discloses a method for preparing tetrahydrofurfuryl alcohol from furfural by aqueous phase hydrogenation. According to the method, furfural is directly converted into tetrahydrofurfuryl alcohol by using water as a solvent in a 0.5-10MPa hydrogen atmosphere at 80-180 DEG C in the presence of a nickel-based catalyst and an alkali additive, wherein the yield of the tetrahydrofurfuryl alcohol can reach 94%.

The invention relates to a method for preparing a novel A-B/X or A/X carried catalyst of 1,5-pentanediol by performing a selective hydrogenolysis reaction on tetrahydrofurfuryl alcohol obtained from forestry and agricultural residues taken as raw materials. According to the novel A-B/X or A/X carried catalyst, wherein the component A is any one or more than one of Rh, Ir, Pt, Pd and Ru; the assistant B is any one or more than one of V, Nb and Ta; the carrier X is any one of SiO2, activated carbon, SiO2-Al2O3, titanium oxide and zirconium oxide; the carrying quantity of a precious metal A in the catalyst is between 0.5% and 10%; the molar ratio of the assistant B to the precious metal A is 0.01-1.0; the reaction pressure is between 1MPa and 20MPa; and the reaction temperature is between 50 DEG C and 150 DEG C. The novel A-B/X or A/X carried catalyst has the characteristics of moderate reaction condition, high reaction activity and good selectivity, thereby providing a novel effective way for preparing the 1,5-pentanediol by utilizing biomasses of the forestry and agricultural residues.

The invention discloses a method for preparing tetrahydrofurfuryl alcohol through water-phase hydrogenation of furfural. According to the method, in a water-phase reaction medium, furfuryl alcohol undergoes one-step hydrogenation at 80 to 180 DEG C in a hydrogen atmosphere with a pressure of 0.5 to 10 Mpa under the action of alkaline earth metal-modified alumina-loaded nickel-based catalyst, thereby producing tetrahydrofurfuryl alcohol. The catalyst used in the water-phase hydrogenation is a metal-loaded catalyst; a carrier is an alumina carrier modified by one or more alkaline earth metals; the alkaline earth metal is one or more selected from a group consisting of Mg, Ca, Sr and Ba; and water is used as a solvent, which accords with the principles of green chemistry and enables cost to be reduced. The catalyst provided by the invention can realize high-yield preparation of tetrahydrofurfuryl alcohol in a water phase, reduces reaction cost and separating difficulty and enables the yield of tetrahydrofurfuryl alcohol to reach more than 99%.

The invention relates to a process for recovering distillation waste liquid generated by producing 1,4-butanediol and belongs to the technical field of recycling of organic waste liquid in the industrial production. According to the invention, the distillation waste liquid generated in the process of producing 1,4-butanediol by a Reppe method is used as a raw material; drained wastewater is used as an extracting agent; sodium sulfate is used as a salting-out agent; sulfuric acid is used as a catalyst for depolymerizing reaction; and by a circulating process of salting-out-extraction, reduced pressure batch distillation separation and depolymerizing reaction, various products in the distillation waste liquid, such as 1,4-butanediol, butanol and 3-tetrahydrofurfuryl alcohol are recovered. The process disclosed by the invention has the characteristics that various products can be recovered, the recovery rate of the products is high and the recovery economic benefits are good; the process sufficiently utilizes waste liquid resources and is beneficial to environment protection; the process is simple, reaction conditions are mild, equipment is conventional and recovery cost is low; and the process has a wide application range and is convenient to popularize and apply. The process can be widely applied to recycling of the organic waste liquid in the industrial production and is particularly suitable for recycling the waste liquid generated in the process of producing 1,4-butanediol by the Reppe method.

The invention discloses anti-rust oil having high resistance to damp-heat. The anti-rust oil having high resistance to damp-heat comprises, by weight, 62-70 parts of light diesel fuel 0#, 2-3 parts of polyoxyethylene abietate, 1-2 parts of ammonium molybdate, 4-6 parts of acetylated lanolin, 1-2 parts of dodecanamine, 0.3-1 part of alkenyl succinic acid, 0.2-1 part of potassium dodecylbenzosulfonate, 0.2-0.3 parts of tetrahydrofurfuryl alcohol, 3-5 parts of phthalic acid ester, 2-3 parts of potassium oleate, 1-2 parts of methylbenzotriazole and 10-14 parts of a film-forming assistant. The anti-rust oil has good resistance to damp-heat, water and salt mist, has lasting workpiece protection effects and has good weatherability. The used film-forming assistant can effectively improve anti-rust oil stability.

The invention discloses a method for continuously preparing 1, 5-pentanediol from tetrahydrofurfuryl alcohol. According to the method, platinum loaded tungsten-zirconium composite oxide is taken as a catalyst, and a 10-90% solution tetrahydrofurfuryl alcohol aqueous 10-90% solution and hydrogen are simultaneously and continuously introduced into a fixed bed reactor for reaction so as to generate1, 5-pentanediol under the reaction conditions that the temperature is 100-150 DEG C, the pressure is 1-5 MPa, the mass flow rate of the tetrahydrofurfuryl alcohol is 0.05-1 A/H (A is the mass of the catalyst in the reactor), and the mol ratio of hydrogen to tetrahydrofurfuryl alcohol is 10-100. The mol ratio of various metal elements in the catalyst is Pt: W: Zr=(0.05-0.5): 1: (5-30). The method is moderate in reaction condition, high in catalytic activity, good in product selectivity, simple in process and continuous in production; and the raw materials are from biomass, thereby meeting the green chemical development direction.

The invention discloses a solid-supported Cu-Ni bimetallic catalyst and a method for preparing tetrahydrofurfuryl alcohol by full hydrogenation of furfural catalyzed by the catalyst. Coarse pore microsphere silica gel is used as a carrier, and the surface of the carrier is modified with an organosilicone coupling agent with a terminal group having -NH2; reflux is performed on the microsphere silica gel modified by organosilicone together with an active metal Cu source and an active metal Ni source; and the solid-supported Cu-Ni bimetallic catalyst is prepared by complexing coordination of themetals Cu and Ni with the terminal group NH2. When the catalyst is used for catalyzing the furfural to prepare the tetrahydrofurfuryl alcohol by full hydrogenation, the stability of a Cu-Ni double-active metal site in a catalytic reaction as well as the low-temperature hydrogenation activity and selectivity of the Cu-Ni double-active metal site are remarkably improved. The catalyst disclosed by the invention can be continuously used, has universality, and has the advantages of being good in active metal dispersion degree, high in low-temperature hydrogenation activity, easy to recover, good instability, simple in preparation process and high in product yield.

The invention discloses application of an apatite substance in catalytic hydrogenation and a tetrahydrofurfuryl alcohol preparation method. The method can be used for an alcohol or alkane solvent system, furfural is completely hydrogenated in the hydrogen atmosphere of 0.1-6 MPa at the temperature of 0-200 DEG C under the effects of Pd-HAP prepared from hydroxyapatite and palladium metal by adopting an ion exchange method and other catalysts to generate the tetrahydrofurfuryl alcohol, and the method is provided for efficient utilization of biomass raw materials. The used catalysts can be used for high-conversion-rate and high-yield preparation of tetrahydrofurfuryl alcohol in the alcohol or alkane solvent system, and the conversion rate of the furfural and the yield of the furfural can be up to 100%. The tetrahydrofurfuryl alcohol preparation method is simple, reaction devices are simple, the operation is simple and convenient, a product and the catalysts are easy to separate, the catalysts are cheap and easy to obtain, and the catalysts have good hydrothermal stability and recycling performance, are suitable for industrial production and have a very broad application prospect.

The invention provides a tantalum-based catalyst and applications of the tantalum-based catalyst in a 1,5-pentanediol preparation reaction through catalytic conversion of tetrahydrofurfuryl alcohol. According to the catalyst, one or a plurality of a small amount of metals selected from platinum, palladium, iridium rhodium and the like are used as the active metal component and are supported on oneor a plurality of carriers selected from different forms of tantalum oxides, or two metals such as platinum and tantalum are supported on one or a plurality of carriers selected from SBA-15, MCM-41,silicon dioxide and active carbon; and the catalyst can achieve the catalytic conversion of tetrahydrofurfuryl alcohol at a temperature of 100-300 DEG C under a hydrothermal condition of the initial hydrogen pressure of 1-10 MPa. According to the present invention, the catalyst has characteristics of stable property, easy separation from the reaction system, convenient recovery and convenient regeneration, and can be conveniently used in industrial production application in the future.

The invention discloses a water-based LED (light emitting diode) chip cleaning agent, prepared from the following components of alkylolamide polyoxyethylene ether, polyoxyethylene sorbitan fatty acid ester, an emulsifier, an organic solvent, tetrahydrofurfuryl alcohol, trifluoroethanol, tripropylene glycol monomethyl ether, 2-(2'-hydroxylphenyl)benzoimidazole, sodium cumenesulfonate, a dispersant, a corrosion inhibitor and deionized water. The cleaning agent provided by the invention has the advantages that the effects of high cleaning efficiency, strong detergency, good safety performance, freeness from environmental pollution, energy saving and low washing cost are achieved; an LED is not damaged in a washing process; a protective film can be formed on the surface of a chip through the cleaning agent, so that air is isolated, and the chip is prevented from being corroded by moisture and other molecules in the air, therefore the effect of oxidation resistance is achieved, and a next production process is conveniently performed.

The invention discloses a method for preparing tetrahydrofurfuryl alcohol. According to the method, a supported nickel catalyst is adopted to perform hydrogenation on furfural, so that the tetrahydrofurfuryl alcohol can be obtained; the raw material conversion rate is greater than 99%, and the product selectivity is greater than 99%. The invention also discloses a preparation method of the supported nickel catalyst, and application of the supported nickel catalyst in a hydrogenation reaction of the furfural. The technical route provided by the invention has the beneficial characteristics of being simple and convenient to operate, mild in reaction conditions, high in target product yield and low in energy consumption.

A UV curing acrylic ester adhesive is composed of, by mass, 40-50 parts of methyl methacrylate (MMA), 50-60 parts of butyl acrylate, 5-10 parts of vinyl acetate, 3-5 parts of acrylic acid, 5-20 parts of dioctyl-phthalate (DOP), 0.2-1 part of benzoyl peroxide, 60-70 parts of toluene, 5-10 parts of tetrahydrofurfuryl alcohol, 5-10 parts of quartz powder and 0.5-2 parts of ammonium persulfate. According to the UV curing acrylic ester adhesive, in a double glass detection under 40 DEG C, the glass cannot be penetrated by a 227g steel ball which falls from a height of 12m, spalling fragments at the back are lighter than 20g, the glass cannot be aged after three hours of water boiling at 100 DEG C, and the shear strength maintains at 6-7MPa.

A cleaning composition, in a concentrated form comprising a water-soluble organic solvent, an ionic surfactant, a nonionic surfactant, a chelating agent, and distilled water.

The invention discloses photoresist cleanout fluid. The cleanout fluid comprises alcohol amine, tetrahydrofurfuryl alcohol and benzotriazole and/or derivatives thereof. The photoresist cleanout fluid can be used for removing photoresist in light-emitting diodes (LED) and semiconductors and basically does not attack base materials, such as metallic aluminium and copper, and moreover, the cleanout fluid system has high water resistance, and the operating window is widened.

The invention discloses a method for preparing tetrahydrofurfuryl alcohol by liquid phase hydrogenation. According to the method disclosed by the invention, the tetrahydrofurfuryl alcohol is prepared through the following steps: applying a loaded palladium catalyst for performing high-selective hydrogenation on furfuryl alcohol under the conditions of a low temperature and low pressure, and performing a reaction. The carrier of the loaded palladium catalyst is a titania material, and palladium nanometer metal ions are loaded on the carrier. The invention further discloses a preparation method of the loaded palladium catalyst. The method disclosed by the invention has the characteristics of mild reaction condition, high catalytic activity, high selectivity of the tetrahydrofurfuryl alcohol and the like.

The invention provides a novel method for preparing gamma-butyrolactone. With the method, molecular oxygen (air or oxygen) is adopted as an oxygen source; a high-efficiency catalyzing method is adopted, and tetrahydrofurfuryl alcohol is directly subjected to liquid-phase selective oxidation, such that gamma-butyrolactone is obtained. The method adopts a reaction raw material of tetrahydrofurfuryl alcohol which can be obtained from biomass raw materials such as corn cob, husk, and downstream product furaldehyde. The material source is rich, and price is low. The method is a gamma-butyrolactone preparation novel technological path which is independent of fossil resources. During the reaction process, no solvent is needed. The reaction condition is mild. The method has important application prospect.

The invention relates to a synthesis method of ethyl tetrahydrofurfuryl ether, wherein tetrahydrofurfuryl alcohol, halohydrocarbon and alkali are placed in a reactor and react when being stirred. The reaction temperature is 5 to 95 degrees centigrade. The reaction time is 0.5 to 9 hours. The mole ratio of the tetrahydrofurfuryl alcohol, the halohydrocarbon and the alkali is 1 to 1-4 to 1-4. The invention adopts the tetrahydrofurfuryl alcohol, the halohydrocarbon and the alkali to react together and can synthesize the ethyl tetrahydrofurfuryl ether with high yield. The technological method provided by the invention leaves out the technology step of preparing sodium alkoxide, eliminates the dangerous factor of production technology, reduces the pollution discharge in the production process and effectively reduces the manufacture cost.

The object of the present invention is to provide a feedstock liquid, from which fuel kernels with good quality can be produced, and a method of preparing the feedstock liquid. The present invention provides a feedstock liquid with a viscosity from 4.0×10⁻² to 6.5×10⁻² Pa·s at 15° C., for the production of ammonium diuranate particles. The present invention also provides a method of preparing a feedstock liquid used for the production of ammonium diuranate particles, which includes mixing a uranyl nitrate solution and tetrahydrofurfuryl alcohol to produce a uranyl nitrate mixture, dissolving polyvinyl alcohol in water to produce an aqueous polyvinyl alcohol solution, mixing the aqueous polyvinyl alcohol solution with tetrahydrofurfuryl alcohol to produce a polyvinyl alcohol solution, and mixing the uranyl nitrate mixture with the polyvinyl alcohol solution.