14 results about "Formaldehyde product" patented technology

The invention provides a catalyst for adjusting the normal / isomeric ratio of a butyraldehyde product and an adjusting method of the catalyst. The catalyst comprises a ligand A, a ligand B and a rhodium substrate, wherein the ligand A is one or more of # imgabs 0 #, # imgabs 1 #, # imgabs 2 # or # imgabs 3 #; and the ligand B is # imgabs4 #. The invention provides a catalyst for adjusting the normal / isomer ratio of a formaldehyde product in the process of preparing butyraldehyde through a propylene hydroformylation reaction, and the catalyst has propylene hydroformylation catalytic activity after complexing a ligand A, a ligand B and a rhodium substrate based on an accurately designed ligand combination. A mixed ligand composed of a ligand A and a ligand B according to a certain proportion is added in a propylene hydroformylation reaction to be complexed with rhodium, so that the n-iso-ratio of butyraldehyde can be flexibly adjusted in a range of 1-17.3.

The application relates to a composite film material, a urea-formaldehyde product and a preparation method thereof, and a toilet bowl. The composite film material comprises a modified film material, the modified film material comprises a reinforcing cloth and a PVB matrix coated on the surface of the reinforcing cloth and filled in the reinforcing cloth, the total thickness of the modified film material is 0.1mm-2mm, the modified film material is provided with a plurality of through holes arranged in the thickness direction, and the diameter of each through hole is 1mm-5mm; the grammage of the reinforcing cloth is 10g / m 2 ~120g / m 2 ; the material for preparing the PVB matrix comprises PVB 85-92 parts and a plasticizer 8-15 parts in mass fraction, the total mass fraction of the PVB and the plasticizer is 100 parts, and the viscosity of a 10% PVB ethanol solution at 20 DEG C is 30s-120s. The composite film material has high hardness and high impact resistance, is applied in the urea-formaldehyde product, and is favorable for improving the impact resistance of the urea-formaldehyde product.

The invention provides a formaldehyde decomposition catalyst, a preparation method, a use method and application thereof, and a room-temperature formaldehyde removal product, and particularly relates to the technical field of gas purification. The formaldehyde decomposition catalyst comprises a molecular sieve and nano AgMnO2 loaded on the molecular sieve, and the nano AgMnO2 has a copper manganese ore structure. According to the formaldehyde decomposition catalyst, nano AgMnO2 with a copper manganese ore structure is used, so that a (100) surface can be exposed to the maximum extent, and the migration ability of active oxygen is improved; the molecular sieve is beneficial to adsorption and enrichment of formaldehyde, and the combination of the molecular sieve and the active oxygen enables the formaldehyde adsorbed on the surface of the catalyst to rapidly react with and be mineralized with the active oxygen to generate nontoxic and harmless carbon dioxide and water, thereby achieving the purpose of decomposing formaldehyde. The selectivity of the catalyst to carbon dioxide is always kept at 100%, the formaldehyde conversion rate can also reach 100%, excellent selectivity and removal efficiency are shown, no intermediate product is generated, and secondary pollution is avoided.

This invention discloses a green and energy-saving formaldehyde production system and method. Methanol is fed into a methanol buffer tank, then sequentially preheated in a dehydrogenation feed preheater, a dehydrogenation evaporator, and a first preheater to 210-260°C. After being heated, it enters the dehydrogenation reactor for a dehydrogenation reaction in the presence of a catalyst. The reaction liquid sequentially enters the first preheater and the dehydrogenation feed preheater to recover heat, and then sequentially enters a condenser and a dehydrogenation separator for gas-liquid separation. The liquid phase sequentially enters a preheater, a dryer, a light tower, and an aldehyde tower for separation to obtain formaldehyde product. The remaining liquid enters an alcohol tower to recover formaldehyde. The gas phase sequentially enters a dehydrogenation condenser, a compressor, and a pressure swing adsorption unit to obtain hydrogen. This invention produces hydrogen as a byproduct, which is used as an energy output, making it a green and energy-saving production process. Furthermore, the addition of water vapor reduces the occurrence of side reactions such as dimethyl ether and carbon buildup.

The application discloses a urea-formaldehyde composite material and a preparation method and application thereof, wherein the urea-formaldehyde composite material comprises urea-formaldehyde particles and a toughening agent, and the toughening agent is an acetal polymer. The urea-formaldehyde composite material can realize anti-cracking of urea-formaldehyde products without changing ceramic texture and high hardness of urea-formaldehyde material, and the preparation process of the urea-formaldehyde composite material is simple and easy to carry out large-scale production.

The invention relates to the technical field of organic synthesis, in particular to a preparation method of cyclopropyl formaldehyde, which comprises the following steps: by taking methyl cyclopropyl formate as a raw material, red aluminum as a reducing agent and toluene as a solvent, carrying out heat preservation reaction under the protection of nitrogen and controlling the reaction temperature to be not more than-78 DEG C; after the reaction is finished, firstly carrying out quenching reaction by using absolute ethyl alcohol, then adding a saturated ammonium chloride solution for further quenching reaction, then adjusting the pH value to be acidic, layering, collecting a water phase, extracting, combining the collected organic phase, drying, filtering, and then carrying out distillation treatment on the material liquid, so as to obtain the product. And rectifying the material liquid without the extracting agent to obtain a cyclopropyl formaldehyde product. The process method can reduce the cost, is suitable for industrial production, and greatly improves the yield and purity of the cyclopropyl formaldehyde product.

1. Name of the designed product: packing bottle. 2. Use of the designed product: used for containing articles such as formaldehyde-removing products. 3. Design points of the designed product: the shape of the product. 4. Picture or photo best indicating the design points: perspective view.

The invention discloses a catalyst for preparing formaldehyde through methanol oxidation and a preparation method thereof, and belongs to the technical field of catalyst processing. The preparation method comprises the following steps: mixing deionized water, an alkali source, a boron source and a molybdenum source, adding a silicon source, uniformly mixing, crystallizing, distilling, filter-pressing, washing and drying the crystallized material to obtain a catalyst precursor, adding the dried precursor into a mixed aqueous solution of nitric acid and ferric nitrate, filtering, washing, drying, forming and roasting the material to obtain the catalyst, the catalyst is used in a reaction for preparing formaldehyde through methanol oxidation, the prepared catalyst is high in strength and long in service life, and the selectivity of a formaldehyde product obtained after the reaction is high.

The invention discloses a preparation method and application of a high-temperature-resistant microcapsule suitable for nylon melt spinning, and belongs to the technical field of fiber materials. The invention aims to solve the problems that the existing phase change microcapsule (PCM) is easy to damage and leak during high-temperature melt spinning of chinlon due to insufficient heat resistance, and the finished fabric is easy to yellow due to illumination. According to the method, silicon dioxide nanoparticles are adopted as a Pickering stabilizer to form an oil-in-water emulsion, isophorone diisocyanate and triethylene tetramine are subjected to a polymerization reaction on an oil-water interface, a high-temperature-resistant polyurea / SiO2 hybrid wall material is formed, and a phase change core material n-octadecane is coated. Compared with the prior art, the microcapsule prepared by the invention is good in thermal stability and can bear a high-temperature environment of nylon melt spinning; the particle size distribution is uniform and ranges from 0.50 mu m to 2.72 mu m, and a spinneret plate is not prone to being blocked; and the wall material does not contain formaldehyde, so that the product safety is high.

This invention relates to a method for purifying terephthalaldehyde. More specifically, this invention relates to a method in which crude terephthalaldehyde is subjected to centrifugal chemical extraction to react impurities such as organic carboxylic acids into carboxylate salts, which then enter the aqueous phase. The separated oil phase is then subjected to distillation and melt crystallization to remove trace impurities such as benzaldehyde and p-methylbenzaldehyde, thereby obtaining high-purity terephthalaldehyde. This invention combines centrifugal chemical extraction and vacuum distillation coupled with melt crystallization, which can efficiently obtain high-purity terephthalaldehyde products. Because the purification process does not use organic solvents, it reduces wastewater pollution to the environment and has good prospects for industrial application.

The application provides a methanol oxidizer, which comprises an oxidizer shell, the oxidizer shell comprises a feeding section, a catalytic section, a cooling section and a discharging section connected in sequence from top to bottom; one end of the catalytic section towards the feeding section is provided with an auxiliary heating mechanism, and the other end is provided with a catalytic reaction mechanism; the auxiliary heating mechanism comprises a heat collecting cover arranged in the catalytic section and a breather pipe arranged on the heat collecting cover and towards the catalytic reaction mechanism, one end of the breather pipe extending into the heat collecting cover is in communication with the heat collecting cover, and the other end is in communication with the catalytic section. The methanol oxidizer can realize efficient heating of raw material gas entering the catalytic section by arranging the auxiliary heating mechanism at one end of the catalytic section towards the feeding section, so that the raw material gas and the catalyst can react at high temperature, the reaction effect of the raw material gas and the catalyst is improved, the loss of the raw material is reduced, and the quality of the formaldehyde product is improved.

1.The name of the design product: packaging box (green source point net aldehyde removal can). 2.The use of the design product: packaging for aldehyde removal products. 3.The design points of the design product: the combination of shape and pattern. 4.The picture or photo that best shows the design points: perspective view. 5.The design claimed contains color.

1.The name of the design product: packaging box (green source instant magic ball). 2.The use of the design product: packaging for formaldehyde removal products. 3.The design points of the design product: the combination of shape and pattern. 4.The picture or photo that best shows the design points: perspective view. 5.The design claimed contains color.

The invention provides a silver-method formaldehyde production process, and belongs to the field of organic synthesis. By adopting the technical scheme that the methanol is pumped into the evaporator through the methanol pump, the methanol enters the evaporator through pressure boosting of the Roots blower, the methanol heat exchange plate exchanger, the gas distribution cylinder and the like, efficient evaporation of methanol and effective recovery of heat are realized, unit consumption of methanol is remarkably reduced, and production efficiency is improved; by arranging the three absorption towers and adopting a circulating absorption technology, the temperature of gaseous formaldehyde is effectively reduced, so that the production of 37% high-concentration liquid formaldehyde is realized, the formaldehyde concentration is improved, the content of methanol in a formaldehyde product is reduced, and the production cost is remarkably reduced; and a soft water storage tank circulating pump system and accurate flow control are adopted, so that accurate material supplementation of the third absorption tower is realized, reasonable addition of water in the absorption process is ensured, and the purposes of diluting formaldehyde and stably outputting formaldehyde on the same set of equipment are achieved.