35 results about "Trioxane" patented technology

The invention discloses an application of an ionic liquid in extraction of trioxymethylene, in the process of generating trioxymethylene by acid-catalyzed condensation of a formaldehyde aqueous solution, the ionic liquid is added as an extraction agent to extract and separate the trioxymethylene generated by reaction, and the ionic liquid is methyl tributyl phosphonium bis (trifluoromethanesulfonyl) imide salt; when the ionic liquid is used for extracting trioxymethylene, a ternary azeotropic system of trioxymethylene, water and methylene glycol can be broken, the ionic liquid and trioxymethylene are subjected to nonpolar Van der Waals' force interaction so as to realize extraction, and methylene glycol and water are left in a water phase through hydrogen-bond interaction, so that high-purity trioxymethylene with the purity of more than or equal to 99.5 wt.% is obtained.

The utility model relates to the technical field of trioxymethylene reactor pressure detection, and discloses a trioxymethylene reactor pressure detection device, which comprises a reactor main body, a pressure detector and a display panel, a pressure controller is arranged on the reactor main body, and a reactor gas phase pipeline is arranged on the reactor main body. According to the trioxymethylene reactor pressure detection device, the pressure detector is arranged on the reactor gas phase pipeline of the reactor main body, the pressure controller is installed on the reactor main body, the pressure detector is arranged on the reactor gas phase pipeline, and the pressure controller is arranged on the reactor gas phase pipeline of the reactor main body. The internal pressure of the reactor gas phase pipeline can be detected through the pressure detector, the internal pressure of the reactor main body can be detected through the pressure controller, and the pressure difference between the two sides of the reactor silk screen layer can be obtained through the pressure controller and displayed on the display panel, so that the working condition of the reactor main body can be conveniently and quickly checked; and the blockage problem can be timely found and processed.

The application relates to the field of CO2 utilization and storage technology, and discloses a double Mannich base corrosion inhibitor as well as a preparation method and application thereof. The method is carried out under the condition that the pH is 3-4; the method comprises the following steps: (1) in the presence of ethanol, a compound shown in formula (A) is subjected to a first reaction with 1,3,5-trioxane to obtain an intermediate product; in formula (A), R is -(CH2)7CH=CH(CH2)7CH3; (2) in the presence of ethanol, the acetophenone is added dropwise into the intermediate product to carry out a second reaction, so that the double Mannich base corrosion inhibitor is obtained; the dropwise speed of the acetophenone is 0.0125-0.05 mL / s relative to 1 mol of the compound shown in formula (A); wherein the molar ratio of the compound shown in formula (A), the acetophenone and the 1,3,5-trioxane is 1:2.0-2.3:2.0-2.3. Formula (A).

This disclosure relates to the field of chemical production technology, and in particular to a production apparatus and method for trioxymethylene. The trioxymethylene production apparatus includes: a reaction unit, a separation unit, a first formic acid absorption unit, and a product distillation unit. The outlet of the reaction unit is connected to the inlet of the separation unit; the gas phase outlet of the separation unit is connected to the inlet of the first formic acid absorption unit; the outlet of the first formic acid absorption unit is connected to the inlet of the product distillation unit; and the liquid phase outlet of the separation unit is connected to the inlet of the reaction unit. The reaction unit is used to convert formaldehyde into trioxymethylene under the action of a catalyst. The separation unit is used to separate the gas phase product from the reaction unit into a liquid stream containing recycled formaldehyde and a gas phase stream containing trioxymethylene. The trioxymethylene production apparatus and method provided by this disclosure are used to remove formic acid, a byproduct in the trioxymethylene production process, and reduce equipment corrosion.

The invention relates to a method for producing polyacetal resin. Provided is a method for producing a polyacetal resin with which it is possible to stably and continuously produce a polyacetal resin over a long period of time while suppressing the generation of a tar-like precipitate caused by a polymerization catalyst. A method for producing a polyacetal resin, characterized by comprising a polymerization step in which a polymerization reaction is carried out using (a) a cyclic ether and / or a cyclic formal containing at least trioxymethylene, (b) boron trifluoride or a boron trifluoride complex, and (c) an organic solvent. And the organic solvent (c) is a compound represented by a predetermined formula (1).

The invention relates to the technical field of CO2 utilization and storage, and discloses a bis-Mannich base corrosion inhibitor as well as a preparation method and application thereof. The method is carried out under the condition that the pH is 3-4. The method comprises the following steps: (1) in the presence of ethanol, carrying out first reaction on a compound as shown in a formula (A) and 1, 3, 5-trioxane to obtain an intermediate product; in formula (A), R is-(CH2) 7CH = CH (CH2) 7CH3; and (2) in the presence of ethanol, dropwise adding acetophenone into the intermediate product for a second reaction to obtain the bis-Mannich base corrosion inhibitor, the dropping rate of acetophenone is 0.0125-0.05 mL / s relative to 1 mol of the compound as shown in the formula (A); wherein the molar ratio of the compound shown in the formula (A) to the acetophenone to the 1, 3, 5-trioxane is 1: (2.0-2.3): (2.0-2.3). Formula (A).

This invention relates to a process for preparing compounds having formula (I): R 1 ‑C(=O)‑O‑CH2‑O‑C(=O)‑R 2 (I), where R 1 and R 2 Each of the terms represents an alkyl, cycloalkyl, or aryl group independently, wherein the alkyl, cycloalkyl, or aryl group is optionally substituted; the process includes step i) reacting the following substances: compound A selected from: trioxane, polyoxymethylene without a hydroxyl terminal group; compound (II): R 1 -C(=O)-O-C(=O)-R 2 (II); and perfluorosulfonic acid; wherein step i) is carried out at a temperature T1 of at least 50°C, wherein the molar ratio of compound (II) to compound A is 1:1 to 1.2:1.

The invention discloses a preparation method of a posaconazole key intermediate diol olefin compound, which comprises the following steps: dissolving a compound 1 in an organic solvent A, adding a mixed solution of an additive and an organic solvent B, alkali a and trioxymethylene, continuing to react, and treating to obtain a compound 2; dissolving the obtained compound 2 in an organic solvent C, adding a reducing agent, and performing heating reflux reaction to obtain a compound I; the synthesis route is as follows: the reaction process is simple, the raw materials are simple and easy to obtain, harsh reaction conditions are not needed, the route is simple and convenient, the reaction operation is simple, and the drug development potential is achieved.

The application provides a spherical lignin-phenolic resin and a preparation method and application thereof in adsorbing N-containing organic dyes, and belongs to the technical field of adsorbing materials. The lignin-phenolic resin with regular spherical morphology is prepared by one-step condensation polymerization reaction through the reverse suspension polymerization method under acid catalysis, wherein lignin, hydroquinone and trioxane are used as raw materials. The lignin belongs to renewable resources, has the characteristics of low cost and environmental friendliness, can replace phenol as the main phenol source, and the replacement rate can reach 75%. The yield of the synthesized phenolic resin is as high as 60-80%. In addition, the monomer type can be selected to introduce rich phenolic hydroxyl groups, sulfonic acid groups and other oxygen-containing groups in the resin, the monomer ratio is controlled to change the crosslinking structure of the resin, the adsorption capacity of the resin for N-containing organic dyes is effectively improved, and efficient adsorption of rhodamine B and methylene blue can be realized.

The invention discloses a three-dimensional cross-linked polymer electrolyte based on a TOX monomer, and a preparation method and application thereof. The preparation method of the polymer electrolyte is an in-situ polymerization method, and the electrolyte of the in-situ polymerization method comprises the following raw materials: trioxymethylene and a derivative monomer thereof, a cross-linking agent, a lithium salt, an organic additive and an initiator. Wherein the trioxymethylene and the derivative monomer thereof have a structural formula as shown in a formula (1): # imgabs0 #, wherein R1, R2, R3 and R4 are respectively and independently phenyl, halogen, alkyl of C1-C10, alkenyl of C1-C10, alkynyl of C1-C10, halogenated alkyl of C1-C10, halogenated alkenyl of C1-C10, halogenated alkynyl of C1-C10, cyanoalkyl of C1-C10, cyanoalkenyl of C1-C10 or cyanoalkynyl of C1-C10. The safety of the electrolyte prepared by the method is improved, and the battery prepared from the electrolyte has excellent performance, good interfacial compatibility and the like.

A composition containing (A) 58.5 to 65.5 mass % of formaldehyde, (B) 0.7 to 4.5 mass % of methanesulfonic acid; and (C) less than 0.007 mass % of a metal salt, wherein a total content of the formaldehyde (A) and the methanesulfonic acid (B) is less than 68 mass %, and the metal salt (C) contains at least one selected from a group consisting of a nitrate, a nitrite, and a persulfate.

A process for preparing trioxane from methanol includes: step 1: subjecting a mixture of methanol and methylal to a reaction to obtain formaldehyde, and absorbing the formaldehyde with water to obtain a concentrated formaldehyde aqueous solution; step 2: subjecting the concentrated formaldehyde aqueous solution to cyclization to obtain a mixture containing trioxane, and passing the mixture through a trioxane concentration tower to obtain a crude trioxane product; step 3: converting a by-product and unreacted formaldehyde in the crude trioxane product into methanol, conducting dehydration through a membrane dehydration process, and subjecting a retentate to dealcoholization to obtain purified trioxane; and step 4: subjecting the remaining streams to reactive distillation to obtain a mixture of methanol and methylal at a top- and water at a bottom of the reactive distillation tower; returning the mixture of methanol and methylal to step 1; and returning or discharging the water.

The invention belongs to the technical field of energy, and in particular relates to a biological blended fuel which comprises the following components: methyl palmitate, octadecane-9. 12-dienoic acid methyl ester, cis-11-octadecenic acid methyl ester, 2-methyl undecane, 3-methyl undecane, 3, 6-dimethyl decane, 3.7-dimethyl decane, 3, 8-dimethyl-undecane, 3, 8-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, 6-dimethyl decane, 3, the preparation method comprises the following steps: adding 1, 10-methyl eicosane, 2, 5-dimethyl dodecane, 5-methyl tridecane, 4-methyl-tridecane, 2-bromododecane, 3-methyl-5-propyl nonane, 3-methyl-tetradecane, n-nonane, 6-methyl undecane, 2, 5-dimethyl decane, C16H34, 5-methyl-tetradecane, 7-methyl heptadecane, 4-methyl tetradecane, 3-methyl-tetradecane and 2.5-dimethyl tridecane into a reaction kettle; methyl tetradecane, n-pentadecane and tetradecane; according to the invention, 10-methyleicosane and 5-methyltetradecane are used for providing a high volume calorific value, and the flame temperature is improved compared with that of common biodiesel.

The application discloses a system and an energy-saving process for producing trioxymethylene by means of a heat pump assisted reaction rectification coupled variable pressure rectification, and the process comprises the following steps: feeding a formaldehyde aqueous solution into a pre-rectification tower to enrich, feeding the dilute formaldehyde collected from the top of the tower into a heat pump unit C1 to increase the pressure and temperature, and then taking the dilute formaldehyde as a tower bottom heat source of a high-pressure rectification tower; feeding the concentrated formaldehyde collected from the bottom of the pre-rectification tower into a reaction rectification tower, and converting the concentrated formaldehyde into trioxymethylene under the catalysis of a catalyst; taking the azeotrope of formaldehyde, water and trioxymethylene from the top of the reaction rectification tower as a tower bottom heat source of the pre-rectification tower, feeding the azeotrope into a low-pressure rectification tower after heat exchange and condensation, taking the azeotrope vapor from the top of the low-pressure rectification tower as a heat source of the tower bottom of the reaction rectification tower after increasing the pressure and temperature by means of a heat pump unit C2, feeding the azeotrope into the high-pressure rectification tower after heat exchange and condensation, feeding the dilute formaldehyde collected from the bottom of the low-pressure rectification tower back to the pre-rectification tower to enrich, and collecting the trioxymethylene product from the bottom of the high-pressure rectification tower. The application can improve the single-pass conversion rate of trioxymethylene, simplify the operation, and reduce the operation cost and energy consumption.

The present disclosure relates to anti-cancer agents comprising 1,2,4-trioxane compounds and anti-cancer agents comprising combinations comprising 1,2,4-trioxane compounds and chlorogenic acids. The disclosure further provides pharmaceutical compositions comprising such anti-cancer agents, kits comprising the same as well as methods and treatment regimens of using the aforementioned anti-cancer agents, pharmaceutical compositions and kits in the treatment and prevention of cancer and for prolonging survival of subjects having cancer, in particular ovarian cancer or lung cancer

The invention provides a polymer resin catalyst particle preparation method, which comprises: S1, taking styrene and divinyl benzene, and carrying out free radical suspension copolymerization to obtain a crosslinked polystyrene resin; s2, sulfonating the crosslinked polystyrene resin to obtain sulfonated resin; s3, adding sulfonated resin into water, adding a modification reagent, and drying to obtain modified resin; and S4, crushing the modified resin, mixing the crushed modified resin with an adhesive, and granulating in a granulator to obtain the polymer resin catalyst particles with the particle size of 2-3mm. When the resin catalyst particles prepared by the method are applied to preparation of trioxymethylene in a fixed bed, the conversion per pass is relatively high and is higher than 40%.

The application belongs to the field of catalytic synthesis of trioxane, and particularly relates to a catalytic synthesis process and device of trioxane. The process comprises the following steps: step one, a mixture of methylal and methanol is mixed with oxygen-containing gas as raw material, and reacts to generate formaldehyde under the action of a first catalyst; step two, formaldehyde is dissolved and absorbed by water to obtain concentrated formaldehyde; step three, the concentrated formaldehyde is subjected to catalytic synthesis reaction under the action of a second catalyst to generate trioxane. The device comprises, in sequence in the feeding direction, an oxidation reactor, a heat exchanger, a formaldehyde absorption tower, a fixed bed reactor and a catalytic distillation tower; compared with pure methanol or pure methylal, the raw material of the application is easier to obtain and has lower production cost; the application obtains higher formaldehyde concentration through improved catalyst, and does not need to prepare high-concentration formaldehyde again by negative pressure concentration, so that the single-pass utilization rate of formaldehyde is improved, and various technical problems in the prior art are properly optimized.

The invention relates to the technical field of synthetic methods of methyl acetate, in particular to an ECR-1 zeolite catalyst as well as a preparation method and application thereof. The preparation method of the ECR-1 zeolite catalyst comprises the following steps: A) stirring and mixing an aqueous solution containing a sodium source and an aluminum source, trioxane and colloidal silicon dioxide to obtain a mixed solution; (B) carrying out rotary crystallization on the mixed solution and the mixture at 120-150 DEG C; the mixture is prepared from SiO2, Al2O3, TOX, Na2O and H2O; c) filtering and drying the mixture subjected to rotary crystallization, and calcining to obtain Na-ECR-1; and D) carrying out ion exchange on the Na-ECR-1 and an ammonium nitrate solution at 70-90 DEG C, washing, drying and calcining to obtain the ECR-1 zeolite catalyst. The prepared ECR-1 zeolite catalyst can be used as a catalyst for catalyzing carbonylation of dimethyl ether to synthesize methyl acetate, and has excellent catalytic performance.

The invention relates to the technical field of trioxymethylene production, and discloses a composition for trioxymethylene and a method for synthesizing trioxymethylene. The composition contains a formaldehyde aqueous solution, an acid catalyst and a catalytic promoter, in the formaldehyde aqueous solution, the content of formaldehyde is 28-75wt%, the content of methanol is 0.5-3wt%, and the content of formic acid is 0.02-0.5 wt%; the acid catalyst is sulfuric acid of which the concentration is not lower than 90wt%; relative to 1kg of the formaldehyde aqueous solution, the content of the acid catalyst is 0.3 to 1.0 mol, and the content of the catalytic promoter is 0.3 to 2.0 mol. According to the scheme, the activity of water in the formaldehyde aqueous solution can be reduced, and the relative volatility of the product trioxymethylene and water can be improved, so that the generation of a byproduct formic acid is reduced, and the conversion rate of formaldehyde and the yield of trioxymethylene are improved.

The disclosure provides for mass spectrometry (MS)-cleavable trioxane-based cross-linkers, and uses thereof, including for protein-protein interaction studies using cross-linking mass spectrometry.

The invention relates to the technical field of aqueous energy storage batteries, in particular to an aqueous zinc ion battery electrolyte and preparation and application methods thereof, and the electrolyte comprises a solvent, a zinc salt and an additive; the solvent is deionized water; the additive is prepared by mixing 1, 3, 5-triazine and 1, 3, 5-trioxane according to a molar ratio of (0.15-1): 1; the zinc salt comprises a main salt and a pH buffer salt; the main salt is prepared by mixing zinc sulfate and bis (trifluoromethylsulfonyl) imide zinc according to a molar ratio of (1-4): (1-3); and the pH buffer salt enables the pH value of the electrolyte to be maintained at 4.5-5.5. A proton exchange barrier is formed on an electrode interface, the pH fluctuation of the electrolyte is compressed to a negligible range, and a compound additive of 1, 3, 5-triazine and 1, 3, 5-trioxane is matched for use, so that the growth of zinc dendrites can be remarkably inhibited, the uniformity of zinc deposition can be improved, and meanwhile, the occurrence of interface side reactions can be effectively reduced.

The present disclosure relates to an electrolyte for a lithium-sulfur battery and a lithium-sulfur battery comprising the same, and the electrolyte for the lithium-sulfur battery includes a nonaqueous solvent, a lithium salt, nitrate and trioxane, wherein the nonaqueous solvent includes an ether-based solvent, and the ether-based solvent includes a cyclic ether and an acyclic ether.

The present invention relates to a process of preparation of a compound having formula (I):wherein R1 and R2 represent, independently of each other, an alkyl, a cycloalkyl or an aryl group, said alkyl, cycloalkyl or aryl group being optionally substituted;said process comprising a step i) of reacting:a compound A selected from the group consisting of: trioxane, polyoxymethylene deprived of hydroxyl end groups;a compound of formula (II):anda perfluorosulfonic acid;wherein step i) is carried out at a temperature T1 of at least 50° C., wherein the molar ratio of compound of formula (II): compound A ranges from 1:1 to 1.2:1.

The invention relates to a polymer electrolyte for a low-temperature lithium metal battery and a preparation method of the polymer electrolyte. The polymer electrolyte is used for low-temperature circulation of a solid-state lithium metal battery, and can solve the problems of low ionic conductivity, poor electrode / electrolyte interface contact and the like of a polymer electrolyte at a low temperature. The polymer electrolyte is prepared by heating and compounding acrylate, methyl methacrylate, ethylene carbonate, vinyl ethylene carbonate, propylene oxide, tetrahydrofuran, 1, 3-dioxolane, 1, 4-dioxane or 1, 3, 5-trioxane, a lithium salt, a plasticizer, an additive and a supporting film. The solid-state lithium metal battery adopting the polymer electrolyte disclosed by the invention can stably circulate for 100 circles at the low temperature of-15 DEG C, so that the cycle performance of the solid-state lithium metal battery at the low temperature is greatly improved, and the polymer electrolyte has a wide application prospect.

The invention discloses a trioxymethylene synthesis and concentration method, which comprises the following steps: feeding a concentrated formaldehyde solution into a trioxymethylene reactor, and enabling a sulfuric acid catalyst to automatically flow into the trioxymethylene reactor in a head tank through a mass flowmeter and a regulating valve; the concentrated formaldehyde solution is subjected to an exothermic reaction under the action of a sulfuric acid catalyst, a trioxymethylene gas-phase crude product is obtained at the top of the trioxymethylene reactor, the trioxymethylene gas-phase crude product is sent to a trioxymethylene concentration tower to be continuously concentrated, and concentrated trioxymethylene is obtained at the top of the trioxymethylene concentration tower; the mass concentration of the concentrated formaldehyde solution is 55-75%, and the mass concentration of the sulfuric acid catalyst in the trioxymethylene reactor is 0.4-2%. According to the invention, the corrosion of the reaction system is reduced, the coking blockage of the reboiler is reduced, the energy consumption is reduced, and the reaction conversion rate is improved.

A method for producing a polyacetal copolymer, which includes a step of copolymerizing 100 parts by mass of trioxane (A), 0.05 to 5 parts by mass of a cyclic acetal compound having an oxoalkylene group having 2 or more carbon numbers in a ring (B), and 0.001 to 0.5 parts by mass of a prescribed fatty glycidyl ether compound (C) having a sodium content of 0.1 to 100 parts by mass ppm in the presence of a linear acetal compound (D) as a molecular weight regulator, wherein in the step, the total mass (g) of (A) to (C) is defined as a, the number of moles of (D) is defined as b, and the total number of moles of moisture and methanol contained in (A) to (C) is defined as c and d, respectively, and is set to satisfy (b + c + d) / a = 4.5 to 9 μmol / g.

The invention relates to the technical field of lithium metal battery electrolytes, in particular to an electrolyte, application thereof and a cathode-free lithium metal battery. The invention provides an electrolyte. The electrolyte comprises a lithium salt, a solvent, a diluent and an additive, the diluent comprises a 1, 3-dioxane derivative, acetal carbon located at the position 2 in the 1, 3-dioxane of the 1, 3-dioxane derivative is substituted by Rf1 and Rf2, and the Rf1 and the Rf2 are the same or different; the Rf1 and the Rf2 are independently fluorine substituted alkyl groups; the additive is prepared from one or more of 1, 3, 5-trioxane, a derivative of the 1, 3, 5-trioxane and paraldehyde, and the additive is prepared from one or more of 1, 3, 5-trioxane, a derivative of the 1, 3, 5-trioxane and paraldehyde. The electrolyte can give consideration to both excellent ion transmission and lithium deposition dynamic performance under a low-temperature condition.

This invention discloses a zinc-based polyoxymethylene gel electrolyte based on weak interactions and its preparation method. Using bis(trifluoromethanesulfonyl)imide zinc (Zn(TFSI)2), dimethyl carbonate (DMC), and 1,3,5-trioxane monomer (TXE) as raw materials, DMC-POM-Zn(TFSI)2 is prepared via ring-opening polymerization. Zn(TFSI)2 acts as the zinc salt and initiator, while DMC acts as the solvent and plasticizer. A weak interaction is formed between DMC and the polyoxymethylene matrix (POM). The resulting DMC-POM-Zn(TFSI)2 exhibits an electrochemical impedance of 7.0–8.0 Ω and an ionic conductivity of 0.55–0.70 mS·cm. ‑1 It can cycle stably for more than 3000 hours, and the polarization voltage remains at 80-90 mV during the cycle.

The invention discloses a full-temperature-range gas phase pressure swing adsorption process crossing trioxymethylene-formaldehyde-water ternary azeotropic composition, which mainly comprises the steps of raw material flow, pressure swing adsorption concentration, pressure swing adsorption desorption and dilute aldehyde recovery side flow circulation, and utilizes cyclic operation of pressure swing adsorption and desorption. According to the method, the existing technology, including extractive distillation, which is adopted in the production process of trioxymethylene and is composed of trioxymethylene-formaldehyde-water ternary azeotrope is effectively matched and replaced, other processes do not need to be changed, and the energy consumption and the production cost are greatly reduced.

The present application relates to the technical field of preparing formic acid gas standard substance, and more particularly to a system and method for preparing formic acid gas standard substance in air. The system comprises a nitrogen source, an oxygen source, a vacuum pump, a raw material container, an intermediate container, a finished product container, a first three-way valve, a second three-way valve, a catalytic cracking pipe and a catalytic oxidation pipe; the nitrogen source, the oxygen source and the vacuum pump are communicated with the first three-way valve; the raw material container is communicated with the intermediate container through the second three-way valve and the catalytic cracking pipe in sequence; the intermediate container is communicated with the finished product container through the catalytic oxidation pipe; and the first three-way valve is communicated with the second three-way valve. The present application prepares formic acid standard gas through a two-step reaction with trioxane as a raw material, avoids the quality loss in the process of preparing formic acid standard gas with fuming formic acid, and can accurately obtain the amount of formic acid standard gas.