53 results about "Azoxymethane" patented technology

The invention relates to a methanol-gasoline blend fuel and a preparation method thereof, belonging to the technical field for preparing fuel gasoline. The methanol-gasoline blend fuel is made of the components with the weight percentage: 55-98% of gasoline, 1-44% of methanol and 1-10% of miscible solvent; wherein, the miscible solvent is more than one in dimethoxymethane, diethoxymethane and methoxyl ethoxy methane. The materials are put into a container to be evenly mixed together according to the mixture ratio, so that the product of the invention can be prepared. The invention has the advantages that as the miscible solvent with certain proportion is added into the methanol-gasoline, the problems of poor stability, bad intermiscibility and easy delamination can be effectively solved; the selected miscible solvent has the boiling range of 42-78 DEG C which is within the boiling range of main components of gasoline, thus not only effectively avoiding the Reid vapour pressure of the methanol-gasoline blend fuel rising and the risks such as remnant and the like, but also being safe and reliable in use.

The invention discloses a continuous catalysis and rectification technology for synthesizing diethoxymethane. According to the invention, formaldehyde and ethanol are adopted as raw materials, and a two-stage linkage catalysis rectifying tower composed of a first-stage reaction rectifying tower and a second-stage reaction rectifying tower is employed. Solid acid catalysts are loaded in both the first-stage and the second-stage reaction rectifying towers. The technology comprises the steps that: (A) formaldehyde is delivered to the first-stage reaction rectifying tower, while ethanol is delivered to the second-stage reaction rectifying tower; (B) formaldehyde discharged from the bottom of the first-stage reaction rectifying tower is delivered to the second-stage reaction rectifying tower, where formaldehyde is subject to a reaction with ethanol; and waste water is discharged from the bottom of the second-stage reaction rectifying tower; (C) material obtained from the top of the second-stage reaction rectifying tower is delivered to the first-stage reaction rectifying tower, where the obtained material is subject to a reaction with formaldehyde; and diethoxymethane, which is a target product, is obtained from the top of the first-stage reaction rectifying tower; (D) the steps from (A) to (C) are repeatedly circulated. The technology has advantages of short processing period, high selectivity, high yield, high product purity, and simple operation. Therefore, the technology is suitable for continuous industrial production.

The invention relates to a method for liquid-liquid extracting and separating diethoxymethane (DEM) and ethanol by adopting glycerin and water in a way of multi-stage counter current, comprising the steps: polylol and the water are taken as extracting agent for liquid-liquid extracting the DEM and the ethanol solution; after extraction and hierarchical separation, extract phase is processed by rectifying, and then solvent can be recycled; the faffinate contains over 99.7% of DEM. The method has the prioritization scheme that liquid-liquid extraction with multi-stage counter current is adopted; the raw material DEM and the ethanol solution are sent to an extracting tower and contacted with extracting agent propanetriol and water which flow into the extracting tower along the reverse direction, the faffinate passes through a static hierarchical section 2 (the liquid stops at the section for more than 10min), and the faffinate contains more than 99.7% of DEM; the mixed liquid of extracting agent at the bottom of the extracting tower is separated by a rectifying tower, and ethanol water solution can be obtained on the top of the rectifying tower. The method can effectively separate the DEM and the ethanol solution, and the purity and one-time yield of the DEM respectively reaches over 99.7% and 98% after separation.

The invention relates to a preparation method of indoxacarb intermediate. The preparation method is characterized by comprising the following steps: dissolving intermediate 5-chloro-2-methoxycarbonyl-2-hydroxy-1-indanone into xylene, adding benzyl carbazate and phosphorus pentoxide, separating out phosphoric acid, adding diethoxymethane into reaction liquid, enabling the solvent xylene to flow back on a tower, dropping the obtained reaction liquid into xylene at a constant speed, gathering ethyl alcohol, performing negative pressure desolventizing on obtained reaction liquid, adding a crystallizing agent into the rest liquid, performing cooling crystallization, filtering, and drying, so as to obtain 7-chloroindeno [1,2-e][1,3,4] oxadiazine-2,4a (3H,5H)-dicarboxylicacid-4a-methyl-2-benzylester. The method is convenient to operate, increases the reaction temperature, accelerates the reaction speed, and obviously improves the content and the yield of the intermediate.

The invention discloses a multi-purpose paint diluting agent and a preparation technology thereof. The multi-purpose paint diluting agent is prepared from the following raw materials: ethylene glycolmonoethyl ether acetate, dichloropropane, pentaerythritol, cyclohexanone, tetrabutyl orthosilicate, ethyl cellosolve, diethoxymethane, methyl isopropyl ketone, turpentine and isophoron. The paint diluting agent prepared by the preparation technology does not contain benzene toxic substances, is safe and has no toxin, and has good stability and strong dissolubility; various types of paint can be dissolved through the multi-purpose paint diluting agent; the production flow is simple, the production cost is low and no three wastes are discharged, so that the multi-purpose paint diluting agent hasa good application prospect.

The invention discloses an oxygenation anticoagulant for diesel oil, which relates to the field of fuels. The oxygenation anticoagulant is prepared by mixing Fischer-Tropsch synthesis kerosene, polyoxymethylene dimethyl ether, diethoxymethane and octanol according to a specific ratio; wherein polyoxymethylene dimethyl ether and diethoxymethane are used as oxygenating agents to improve the cleanness of diesel oil combustion; and the Fischer-Tropsch synthesis kerosene can make up the problem that the dynamic property of the diesel oil is reduced due to the addition of polyoxymethylene dimethyl ether and diethoxymethane, and play a role in maintaining or reducing the condensation point of diesel oil. The preparation of the oxygenation anticoagulant is simple, the main raw materials are from coal-to-methanol and ethanol, and the cost is low. Moreover, the comprehensive performance of the diesel oil can be effectively improved, and the economic value is relatively high.

Lithium diphenylphosphide solutions in a solvent, e.g., diethoxymethane (DEM), that are more stable than when tetrahydrofuran (THF) is used as a solvent. Methods of producing them are also disclosed.

The invention discloses a device for recycling industrial grade diethoxymethane and a method for recycling the industrial grade diethoxymethane, the device comprises an extraction conversion tower anda side line regeneration tower connected with the extraction conversion tower, and the extraction conversion tower comprises a liquid-liquid extraction device and a catalytic conversion device whichare integrally arranged up and down. The method is as follows: the industrial grade diethoxymethane and an extractant are added into the liquid-liquid extraction device for reaction, and then a mixedsolution containing the extractant is sent to the side line regeneration tower for reaction; the mixed solution containing the extractant obtained at the bottom of the side line regeneration tower iscirculated to the liquid-liquid extraction device, an ethanol mixed solution obtained at the top of the tower is circulated to the catalytic conversion device, and a mixture of a formaldehyde solutionand a catalyst is added to the catalytic conversion device for catalytic conversion reaction. The significant advantage of the device is that the device can not only effectively recycle the industrial grade diethoxymethane, but also realize catalytic conversion of ethanol; the process is simple and the environment is protected.