1069 results about "Furfuryl alcohol" patented technology

Methods of consolidating subterranean zones and hardenable resin compositions are provided. A hardenable resin composition of the invention basically comprises a furan liquid resin mixture comprising a 2-furanmethanol homopolymer and furfuryl alcohol, an organosilane coupling agent and an acid catalyst.

A method of isolating a subterranean zone using a sealant composition comprising a partially polymerized furfuryl compound selected from the group consisting of furfuryl alcohol, furfuryl aldehyde, and combinations thereof, and pumping the sealant composition into a well bore positioned adjacent to the subterranean zone. A conduit is placed in the well bore to allow the sealant composition to be pumped into the well bore. The sealant composition is pumped down through the conduit and up through an annulus disposed between the conduit and walls of the well bore. After the sealant composition has cured in the annulus, it isolates the interior of the conduit from the subterranean zone and attaches the conduit to the walls of the well bore. In an embodiment, the weight ratio of the polymerized furfuryl compound to the non-polymerized furfuryl compound in the sealant composition ranges from about 1:1 to about 10:1.

The present invention described a resin composition comprising from about 5% to about 30% phenol, from about 40% to about 70% phenol formaldehyde, from about 10 to about 40% furfuryl alcohol, from about 0.1% to about 3% of a silane coupling agent, and from about 1% to about 15% of a surfactant and methods of using of that resin in controlling particulate flowback from a subterranean formation.

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).

Broadly, the invention provides for newly available bio-derived formaldehyde free furanic materials for aggregate binding. The specific example case is aggregate binding for forms used in the metal casting process. The new materials make possible higher productivity and lower phenol, formaldehyde, urea, and / or furfuryl alcohol content in the metal casting form-making process. It is expected that the formulations will work well in other aggregate binding situations as well.

The invention relates to a catalyst used in a ring-opening hydrogenation reaction of a furan derivative. The catalyst is applied to direct preparation of one-step ring-opening hydrogenation of 1,5-pentanediol and 1,2-pentanediol by taking furfural or furfuryl alcohol serving as a raw material under a mild condition. The catalyst can provide two active ingredients, namely the ring-opening active center of a transition metal oxide and the hydrogenation active center of Pt, Pd, Rh, Ru, Co or Ni, wherein the active center of the transition metal oxide is mainly used for adsorbing furfural or furfuryl alcohol and directly hydrogenating a furan ring for opening the furan ring; and the hydrogenation active center of a noble metal or Co, Ni and the like is mainly used for quickly hydrogenating an intermediate material and hydrogenating subsequent enol so as to obtain 1,5-pentanediol and 1,2-pentanediol. An environmentally-friendly, reproducible, low-cost, mild and effective method is provided for producing 1,5-pentanediol and 1,2-pentanediol. The high-performance ring-opening hydrogenation catalyst is also suitable for the ring-opening hydrogenation reaction of other furan derivatives.

Described is a catalytic process for converting biomass to furan derivatives (e.g., furfural, furfuryl alcohol, etc.) using a biphasic reactor containing a reactive aqueous phase and an organic extracting phase containing an alkylphenol. The process provides a cost-effective route for producing furfural, furfuryl alcohol, levulinic acid hydroxymethylfurfural, γ-valerolactone, and the like. The products formed are useful as value-added intermediates to produce polymers, as precursors to diesel fuel, and as fuel additives.

The invention relates to a porous carbon electrode materials and the preparation method, belonging to the electrochemistry and the novel energy source materials, wherein the porous carbon electrode materials adopt the template carbonization and the method combined with the CO2 post-processing using the meso-porous oxide silicon as the remplate, and the cane sugar, furfuryl alcohol, polyacrylonitrile and the like as the precursors, through the technology steps of the liquid phase impregnation, the high temperature carbonization and the template removal and the like, then combines high temperature process, obtaining the super capacitor porous carbon electrode materials. The porous carbon electrode materials prepared by the method has high surface area, large pore volume, adjustable pore structure and multilevel-microporous pore structure, wherein the pore channel is composed of a meso-porous of 2-5 nm and the microporous with the meso-porous wall of 0.1-2 nm, so the electrochemistry capacity of the prepared porous carbon electrode is marked increased, and the integral property of good.

A reinforced vitreous carbon composite suitable for use in the formation of wear-resistant assemblies, such as joint prosthetic devices, bearings, current collectors, sealing components, brake linings, electrical motor brushes, and other tribological products. The reinforced composite is formed by impregnating a metal reinforcement structure with a furfuryl alcohol resin, and polymerizing the resin while thermally managing the polymerization process, to produce a poly(furfuryl) alcohol continuous phase that is isotropic, homogeneous and essentially completely void-free, e.g., in a bulk composite form having dimensions greater than 25 millimeters in each of the x, y and z directions thereof.

A catalyst for preparing furfuryl alcohol by hydrogenating liquid-phase furaldehyde contains CuO, Cr2O3 and Pd. Its advantages are high activity, conversion rate and selectivity.

The present invention described a resin composition comprising from about 5% to about 30% phenol, from about 40% to about 70% phenol formaldehyde, from about 10% to about 40% furfuryl alcohol, from about 0.1% to about 3% of a silane coupling agent, and from about 1% to about 15% of a surfactant and methods of using of that resin in consolidating subterranean formation fines.

A preparation method for UV-curing self-healing polyurethane based on a furan-maleimide structure adopts furan, maleic anhydride, ethanolamine, furfuryl alcohol, diisocyanate, divalent alcohol, a mono-hydroxy unsaturated monomer and the like as raw materials to synthesize bifunctional UV-curing polyurethane comprising a furan-maleimide addition product. The polyurethane provided by the invention is synthesized through a conventional way, is practical, low in cost and suitable for industrial production, and can be applied to a UV curing system; energy conservation and emission reduction are realized; moreover, a cured film of the polyurethane is excellent in physical property, mechanical property, medium resistance and thermal performance; through the furan-maleimide addition product in resin, the UV curing system is endowed with the self-healing performance, so that the material safety is improved, the service life is prolonged, and the material life cycle cost is reduced.

The invention belongs to the field of the compounding of inorganic nano materials, in particular to a method for preparing a small-size meso-porous hollow carbon sphere. The method comprises the following steps: preparing an aluminum-doped meso-porous silicon dioxide nuclear shell structure sphere, polymerizing the sphere by furfuryl alcohol, carbonizing the sphere and removing a silicon dioxide template. The method for preparing the small-size meso-porous hollow carbon sphere has simple condition and is easy to operate, and the meso-porous hollow carbon sphere prepared by the method has the characteristics of controllable size, even pore diameter, large specific surface area and pore volume, and the like and can be applied to the field of adsorbing agent or drug carrier.

The invention provides a method for preparing cyclopentanone and / or cyclopentanol by furfural or furfuryl alcohol. The method includes the following steps of firstly, mixing furfural or furfuryl alcohol with solvent according to proportion; secondly, adding catalyst with hydrogenating function into the mixture in the first step; and thirdly, reacting in the reducing atmosphere to obtain cyclopentanone and / or cyclopentanol. The method for preparing cyclopentanone and / or cyclopentanol by furfural or furfural alcohol is high in yield of the cyclopentanone and / or cyclopentanol, and further, is simple in process, convenient to operate, mild in reaction conditions, no carbon deposition is caused during the whole reaction, the catalyst is low in cost and easy to obtain and can be reused without lowering activity.

The invention discloses and provides a catalyst used in a process of preparing furfuryl alcohol by furfural through selective hydrogenation and a preparation method of the catalyst, wherein the catalyst has the advantages of lower cost, capability of protecting environment, low reaction temperature, long service life and high activity and selectivity. The catalyst is a copper oxide-silicon oxide compound oxide. The preparation method comprises the steps of: 1, adding water in a copper salt, stirring for dissolving, and reacting by using 10-20 weight percent of sodium hydroxide solution to form a colloid A; 2, diluting the silicon oxide colloid by using water accounting for two times of the silicon oxide colloid by weight to form a colloid B; 3, adding the colloid B into the colloid A, mixing, sequentially heating, ageing, filtering, washing, drying and roasting; and 4, carrying out hydrogenation reduction activation for 3-18h to prepare the catalyst. The catalyst does not contain a toxic material Cr, can react at a low temperature, is capable of reducing the production energy consumption, and is high in reaction activity, high in furfural transformation rate, and high in selectivity of furfuryl alcohol.

The invention relates to a method for preparing gamma-valerolactone with high selectivity under the mild condition. The method comprises the following steps of: under the conditions of optimal room temperature and inert gas, with secondary alcohol as a hydrogen source and active Raney nickel as a catalyst, carrying out hydrogen transfer reaction on a levulinic acid ester compound to obtain the gamma-valerolactone. The invention particularly relates to a method of preparing gamma-valerolactone by a lignocellulose derivative with high selectivity under the mild condition, which comprises the following steps of: carrying out alcoholysis reaction on the lignocellulose derivative such as fructose, 5-hydroxymethylfurfural or furfuryl alcohol by a solid acid catalyst in the presence of an alcohol solvent at certain temperature, filtering solid acid, collecting liquid, and obtaining levulinic acid esters through reduced pressure distillation; and with the secondary alcohol as the hydrogen source, catalyzing the obtained esters by Raney Ni as a non-noble metal catalyst at the room temperature to obtain the gamma-valerolactone with high yield.

The invention discloses a biomass carbon-based material high-load nano-metal catalyst, as well as a preparation method and application thereof. The catalyst is prepared by soaking shaddock peel powderin a nitrate solution having a certain concentration, drying and calcining, metal simple component serves as the active component, and organic carbon serves as the carrier; the nitrate is ferric nitrate, cobalt nitrate, nickel nitrate or copper nitrate; and the metal simple component is iron, cobalt, nickel or copper. The catalyst has the characteristics of environment-friendly raw materials, simple preparation process and high hydrogenation selectivity, has a good effect when being applied to a hydrogenation reaction of biomass derivatives, for instance, the furfuryl alcohol yield at a relatively low temperature of 170 DEG C can be 98,9 percent when the furfuryl alcohol is prepared by a furfuryl alcohol selective hydrogenation reaction.

The invention discloses a porous carbon loaded nano metal oxide catalyst, a preparation method of catalyst, and a hydrogen storage material applying the catalyst. The preparation method comprises the following steps: (1) immersing an organic metal framework into a mixed solution of furfuryl alcohol and alcohol, and stirring for 12-60 hours under a sealed condition; (2) filtering a product obtained from the step (1) to obtain solid powder, and rising the temperature to 140-165 DEG C under inert atmosphere protection; (3) rising the temperature of the product obtained from the step (1) to 700-1000 DEG C under inert gas flow protection; and keeping the temperature and cooling so as to obtain the porous carbon loaded nano metal oxide catalyst. The preparation method of the catalyst provided by the invention is simple and convenient; the hydrogen storage material in which the catalyst is added has the advantages of low hydrogen discharge temperature, high hydrogen discharge velocity, good hydrogen absorption and discharge reversibility and long circulation service life.

The invention discloses a polyimide resin diamond grinding wheel and a preparation method of the polyimide resin diamond grinding wheel. The polyimide resin diamond grinding wheel is prepared from the following components in parts by weight: 50-60 parts of diamond grinding material, 5-10 parts of white corundum grinding material, 5-10 parts of garnet sand, 5-15 parts of polyimide resin powder, 2-6 parts of furfuryl alcohol, 1-2 parts of trioctyl trimellitate, 5-10 parts of cryolite, 5-10 parts of gypsum powder, 2-5 parts of nano siliceous shale powder and 2-5 parts of copper powder. According to the polyimide resin diamond grinding wheel and the preparation method of the polyimide resin diamond grinding wheel, as polyimide resin serving as a binding agent has higher mechanical strength and excellent heat resistance, the durability of the prepared resin grinding wheel is improved greatly; as ceramic material is added into padding, the adhesive property is good, the grinding materials hardly fall off, the heat resistance and hardness of the resin grinding wheel are improved, and cracks formed by rigid grinding are reduced, thereby the use efficiency and service life of the resin grinding wheel are improved further; and in addition, since copper power is added, fast heat dissipation effect is achieved, a great deal of heat generated in a cutting process of the grinding wheel can be dissipated quickly, and the effect of lowering cutting temperature is achieved.

The invention relates to active carbon used for absorbing and removing sulfides in gasoline, and a preparation method thereof. The active carbon is composed of the following components in percentage by weight: 40-70% of petroleum coke, 10-50% of coal, 10-30% of adhesive, 0.1-10% of pore forming agent and 0.1-10% of amodifier, wherein the ash content of the petroleum coke is less than 1%; the coalis anthracite or bituminous coal with volatile content less than 35%; the adhesive is one of or the mixture of coal pitch, coal tar, vacuum residue, coked condensed oil, ethylene cracked residue, catalytic slurry, petroleum pitch and petroleum pitch oxide; the pore forming agent is one of or the mixture of carbon black containing active functional groups and active elements, furfural residue, ferrocene, furfuryl alcohol and potassium; and the modifier is a hydrate nitrate of Cr, Fe, Co, Ni, Mo, Ti, Cu or Zn. The active carbon has the characteristics of low ash content, high strength, high selectivity, excellent adsorption performance and the like.

The invention relates to a furan resin for casting and a preparation method thereof. The furan resin comprises, by weight, 15 to 35 parts of formaldehyde, 5 to 10 parts of urea, 60 to 90 parts of furfuryl alcohol and 5 to 40 parts of lignin. According to the furan resin for casting and the preparation method thereof, the lignin is used for modifying the furfuryl alcohol, the cost is lowered, simultaneously the content of free formaldehyde is lowered to a certain extent, and the initial strength and final strength are improved to a certain extent.

The invention discloses a simple preparation method for a one-piece high load copper base catalyst, which belongs to the technical field of catalyst preparation. Precursors of a metal oxide and active metal are blended at high speed by using a colloid mill, the nucleation process and the crystallization process of precursors of a carrier and an active component are isolated to obtain highly dispersed hydroxide nanoparticle sol, and finally the one-piece high load copper base catalyst which is controllable in metal nucleus diameter and uniform in dispersion is prepared by roasting and reduction. The one-piece high load copper base catalyst is characterized in that nano metal copper is dispersed and anchored in a single magnesium oxide substrate, the specific surface area is 50 to 150 m<2> / g, and the percentage mass content of the copper is 50 to 90 %. After the catalyst is used for hydrogenation preparation of 1, 4-cyclohexanedimethanol by 1, 4-dimethyl cyclohexanedicarboxylic acid and hydrogenation preparation of furfuryl alcohol by furfural, the reaction conversion rate can reach 90 to 99%, and the selectivity to a main product reaches 90 to 99%.

The invention relates to a method for preparing activated carbon. The method comprises the following steps of: weighing one of soluble phenolic resin, furfuryl alcohol resin, polyacrylonitrile and soluble starch, a carbon precursor polymer and one pore-forming agent of polyethylene glycol, polyvinyl alcohol and polyvinyl butyral, mixing, and adding one of methanol, ethanol and deionized water as a solvent for dissolution; and weighing the activated carbon raw material, adding into the solution for dipping, then drying, and carbonizing in a microwave high-temperature sintering furnace at the temperature of 500-1100 DEG C in a nitrogen atmosphere for 0.5-24h. According to the method for preparing activated carbon, provided by the invention, an activated carbon product prepared by the method has abrasion resistance and micropore porosity which are equivalent to those of the raw material activated carbon; and furthermore, the mesopore porosity is further increased in comparison with the raw material activated carbon, and the activated carbon has the advantages of double aperture distribution, large specific surface area and high abrasion resistance, and can meet the application requirements under specific conditions.

The invention discloses a method for preparing 1,2-pentanediol by furfuryl alcohol liquid phase selectivity and hydrogenolysis. According to the invention, a non-precious metal catalyst with environmental protection and high efficiency is selected, which concretely relates to the supported Bu-based catalyst, and then furfural is used for preparing 1,2-pentanediol with high activity and high selectivity under mild hydrogenation condition. The catalyst of the present invention uses furfuryl alcohol with high concentration even pure furfuryl alcohol as a raw material, so that energy consumption for separating a solvent can be reduced.

A composition for the post-treatment of wood is a water-soluble resin prepared from acrylamide, furfuryl alcohol, formaldehyde, urea, guanidino-contained compound, polyhydroxy organic compound, phosphoric acid and ammonia water. It can come in wood by vacuum pressure immersion to strengthen the wood, resulting in improved mechanical performance.

The invention relates to the field of high molecular materials for photocuring 3D printing fast forming equipment and aims to provide a bi-functionality-degree acrylic ester cross-linking agent and application thereof to 3D printing. According to the preparation steps, under protection of nitrogen, furfuryl alcohol, N-hydroxyalkyl maleimide and solvent react, and suction filtration, washing and vacuum drying are carried out on the reaction product to obtain a dihydroxy-terminated Diels-Alder addition product; the addition product is dissolved into the solvent, a pyridine catalyst and acid anhydride are added, the mixture reacts, methyl alcohol is added, the mixture continues to react, methylene chloride is used for dissolving the product, and organic phases are collected to obtain a final product. The initial raw materials are wide in source, the preparation process and purification are simple, and the cross-linking agent is suitable for industrial production process; the product has universality, and the prepared vinyl polymer has excellent mechanical performance and solvent resistant performance of a thermosetting material at normal temperature, and has a recovery processing characteristic of thermoplastic at high temperature; use performance of the product is met, and the application is important breakthrough of the 3D printing material equipment technology.

The invention provides a furfuryl alcohol modified solution for modifying wood or bamboo furfuryl alcohol resin. The furfuryl alcohol modified solution is characterized by comprising the following components in percentage by weight: 15-70% of furfuryl alcohol, 1-3% of borax, 1.5-2.0% of a catalyst and the balance of water, wherein the catalyst is prepared by compounding citric acid and oxalic acid. The furfuryl alcohol modified solution provided by the invention can be used for performing different degrees of furfuryl alcohol resin modification on wood materials or bamboo materials by virtue of brushing, soaking or pressure impregnation modes, and ensures that the size stability, anti-mildew properties, water resistance and part of mechanical properties of the wood materials or the bamboo materials can be improved.

The invention discloses a preparation method of novel modified furan resin for casting. The method is characterized by comprising the following steps of: (1) dissolving 100 parts by weight of saccharides and 0.1-40 parts by weight of urea into 30-200 parts by weight of water; adding 5-60 parts by weight of acid into a mixture to react for 0.5-10 hours at the temperature of 60-105 DEG C; cooling to 30-90 DEG C; regulating a pH value to 7.5-10 and adding 0.1-40 parts by weight of formaldehyde; raising the temperature to 60-100 DEG C to react for 0.5-6 hours; and removing 3-300 parts by weight of water to obtain viscous liquid; and (2) using the viscous liquid obtained in the step (1) as a partial furfuryl alcohol substitute and preparing the novel modified furan resin for casting according to the conventional process of furan resin for casting, wherein the using amount of the viscous liquid is equivalent to the weight of furfuryl alcohol to be substituted and accounts for 1-20 percent of the total weight of a furan resin synthetic raw material for casting. The method is simple, feasible and environmentally-friendly, and a reticulate structure of the resin is formed during curing, so that the intensity of furan resin sand for casting can be improved.

The invention relates to a furan resin for cast steel and a synthesis method thereof. The furan resin is characterized by comprising the following raw materials in percentage by mass: 70-80% of furfuryl alcohol, 9-15% of solid formaldehyde, 10-15% of phenol, 0.5-5.0% of urea, 0.2-0.5% of coupling agent and 2-5% of water. The solid formaldehyde is used instead of liquid formaldehyde in the synthesis process of the furan resin for cast steel, thereby reducing the sewage generated in the production process of the furan resin for cast steel; and the furan resin for cast steel has the characteristics of high strength, low viscosity, favorable molding-sand property and the like.

The invention discloses an furan resin with easy collapsibility used in casting and a preparation method, which is made from a modified rosin. The addition amount of the rosin is 5 to 37 wt percent and is calculated by the total amount of furfuryl alcohol. In the process of synthesizing the furan resin for casting, the modification of the furan resin by adding the rosin can accelerate the heat decomposing speed of the resin; thus the collapsibility of the resin sand is improved and is more suitable for the requirements of the casting production. In the first reaction step in the preparation method when synthesizing the rosin modified furfuryl alcohol, the reaction PH value is 1.0 to 3.0, and the reaction temperature is at 70 DEG C to 90 DEG C; in the second reaction step when synthesizing the furan resin with easy collapsibility, the mol ratio of carbamide and formaldehyde is 1:1.2 to 1:2.4. The obtained easy collapsed furan resin is specialized in casting technology field, and the collapsibility of the resin sand is improved by 30 to 60 percent.