9 results about "Formaldehyde product" patented technology

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.

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 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.

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.