40 results about "Acetone synthesis" patented technology

The present invention discloses the preparation process of Pd/ resin catalyst, and is especially the preparation process of Pd/ resin catalyst for the one-step process to synthesize methyl isobutyl ketone. Pd-containing acid solution and resin are made to produce ion exchange to obtain the catalyst with high activity and high selectivity. The present invention has raised Pd utilization, and the catalyst may be used in hydroetherification of gasoline, synthesis of methyl isobutyl ketone with acetone and other reaction process.

The invention relates to a heterogeneous catalytic method for synthesis of isophorone from acetone. Acetone is used as a raw material, and a magnesium-aluminum composite oxide is used as a catalyst for carrying out catalytic synthesis to obtain isophorone; the magnesium-aluminum composite oxide comprises MgO, Al2O3 and MgAl2O4, the molar ratio of magnesium to aluminum is 0.3-3, the specific surface area is 80-150m<2>/g, and the pore volume is 0.2-0.3cm<3>/g; a fixed bed reactor is used for carrying out synthetic reaction, 20ml of 20 to 40-mesh catalyst is added into a stainless steel reactor of which the inner diameter is 10mm, the reactor is heated to the reaction temperature from the room temperature at the rate of 10 DED C/min after being qualified through an air-tight test, and then, the analytically pure acetone raw material is injected into the reactor by a duplex plunger pump through a preheater; the reaction temperature is 220-290 DEG C; the reaction pressure is normal pressure; and the air speed of the acetone liquid is 0.1-1.0/h, the selectivity reaches 94.5%, the conversion rate reaches 44.8%, and the stability reaches 1000 hours.

The invention relates to an environment-friendly and simple preparation method for synthesizing isophorone from acetone. The method is based on a liquid condensation method and comprises the steps of pouring acetone and a strong alkaline catalyst sodium hydroxide aqueous solution or a strong alkaline catalyst potassium hydroxide aqueous solution in an autoclave; adding microscale auxiliary catalysts of magnesium oxide, aluminum oxide, calcium oxide, barium oxide and a rare metal element of lanthanum; changing a reaction condition to lower reaction activation energy; heating to a temperature of 150 DEG C; reacting for 2 hours at a constant temperature with continuously stirring; cooling to a temperature of 80 DEG C; distilling and refluxing the unreacted acetone for use in the next time; standing residues in the autoclave; separating the liquid and draining out the aqueous solution for use in the next time; distilling the remained materials; and distilling the isophorone out to obtain a finished product. With the method, the formation of high-boiling residues and other by-products is reduced; conversion rate of acetone is increased; and selectivity for isophorone is increased. The environment-friendly and simple preparation method is short in reaction time, low in reaction temperature and simple and environment-friendly in process, and can meet modern requirements and realized production automation and production industrialization.

The invention relates to the field of catalysts and provides a catalyst for synthesizing methyl isobutyl alcohol and isopropanol from acetone, and a preparation method and an application of the catalyst. The catalyst includes, on the basis of total weight, a) 0.5 to 8 parts of at least one of copper or copper oxides; b) 0.5 to 10 parts of at least one of cobalt or cobalt oxides; c) 82 to 99 partsof a supporter which is selected from at least one of silicon oxide, aluminum oxide and zirconium oxide after high-temperature roasting titanium modification. In the catalyst, the active components, Cu and Co, are supported on the titanium-modified supporter through an ammonia evaporation method, so that distribution of the metal active components is more uniform and interaction between the activecomponents and the supporter is enhanced, thus improving activity and stability of the catalyst. The catalyst is low in cost due to use of the low-content non-noble metals, Cu and Co. The catalyst can be used for not only preparing the methyl isobutyl alcohol but also co-producing the isopropanol. The catalyst makes an industrial production device to have stronger adaptive capability on market and can increase enterprise profit.

The invention relates to a catalyst, and belongs to the technical field of applications and development of acetone downstream products, wherein cobalt and tin are used as main active components, fluorine is used as an auxiliary agent component, aluminum oxide, silicon oxide or an aluminum oxide-silicon oxide composite carrier with rich pH value is selected to promote a reaction, the catalyst is used under a mild reaction condition, an one-step acetone synthesis process is used, the yield of methyl isobutyl ketone in the application of the catalyst of the present invention is higher than the yield of methyl isobutyl ketone in the application of the palladium/resin catalyst used in the current industrial apparatus, and a large amount of isopropanol are by-produced. According to the present invention, the obtained catalyst has the ideal stability, has the cost significantly lower than the cost of the existing palladium catalyst, and has good economic benefits.

The invention relates to a method for synthesizing o-ethoxybenzoic acid from salicylic acid and acetone, which comprises the following steps: adding salicylic acid, acetone and potassium hydroxide into a reaction bulb, dropwisely adding bromoethane while stirring at room temperature, heating under reflux for 9-15 hours, recovering the acetone under reduced pressure, adding water and liquid alkali, heating under reflux for 2-4 hours, cooling to room temperature, regulating the pH value to 3-4 with glacial acetic acid, cooling to 1-15 DEG C, separating by vacuum filtration, washing with water, and carrying out vacuum drying to obtain the o-ethoxybenzoic acid, wherein the salicylic acid:potassium hydroxide:bromoethane:liquid alkali mol ratio is 1:(2.0-2.5):(2.1-2.5):1.3. The method has the advantages of simple technique, low raw material cost, high yield and good quality, and is convenient to operate and convenient for industrial production.

The invention discloses a catalyst for synthetic reaction of 1-methoxy-2-acetone and a preparation method thereof. The catalyst is prepared by means of a sol-gel process from a main active component,metallic copper element accounting for 15-30% by mass of the catalyst, an auxiliary active component, IA or IIA metallic element accounting for 1-6% by mass of the catalyst, and the balance, a silicondioxide support. The catalyst prepared via the method o the invention has high catalytic activity, good selectivity, long catalyst life, capability of being suitable for industrial continuous production and the like. 1-Methoxy-2-propanol is subjected to direct dehydrogenation reaction under the reaction temperature of 230-270 DEG C, reaction pressure of normal pressure and mass space velocity of1-4 h<-1> to generate 1-methoxy-2-acetone, material conversion rate may reach 70% and above, and 1-methoxy-2-acetone selectivity may reach 98% and above.

The invention relates to an emergency stop method of an acetone one-step synthesis MIBK device and an acetone synthesis MIBK method. The emergency stop method is characterized by including the steps of firstly, stopping heating the raw material acetone; secondly, lowering the temperature of cooling water, controlling the cooling rate of the cooling water to be 1-15 DEG C/h when the temperature ina reactor is higher than 75+/-5 DEG C, and controlling the cooling rate of the cooling water to be 10-30 DEG C/h when the temperature in the reactor is lower than 75+/-5 DEG C until the temperature inthe reactor is lowered to be 15-35 DEG C; thirdly, stopping feeding the material acetone into the reactor; fourthly, guiding process water into the reactor to wet a catalyst, wherein the volume ratioof the guided process water to the catalyst is 0.35-1.2; fifthly, stopping the discharging of the reactor and stopping the feeding of nitrogen so that stopping can be completed. The emergency stop method is high in stopping speed and well protects the catalyst.

The invention discloses a 1-aryl-2-acetone compound preparation method, which comprises: (1) carrying out a reaction on (E)-2-methyl-3-aryl acrylic acid (I) as a starting raw material and diphenyl azidophosphate (DPPPA) in the presence of an organic alkali; (2) carrying out a heating reaction; and (3) adding an acidic aqueous solution into the reaction solution, and carrying out a reaction to obtain the 1-aryl-2-acetone compound with a structural formula (IV). According to the present invention, the method can solve the technical problems of difficultly available, highly-corrosive, highly toxic and highly explosive reagents, long steps, low yield, tedious operation and the like in the 1-aryl-2-acetone synthesis in the prior art, has characteristics of easily available raw materials, safe and simple operation, mild condition and high yield, and is suitable for industrial production.

The invention provides acetone synthetic gasoline. The acetone synthetic gasoline is characterized by comprising the following components in parts by weight: 16-29 parts of acetone, 11-17 parts of glyceride, 9-13 parts of ethylene glycol monobutyl ether, 5-14 parts of isopropanol and the balance of gasoline. The acetone synthetic gasoline has good intersolubility, can be used for improving the waterproof capability and effectively solving the problem of stratification of methanol and gasoline and is more practical.

The invention relates to the technical field of chemical analysis, and particularly discloses a method for detecting p-methoxypropiophenone related substances. According to the method, ZB-1 (60m * 0.25 mm * 1.0 [mu] m) is adopted as a detection chromatographic column, the column temperature is set to be 38-42 DEG C and maintained for 2-10 min, then the temperature is increased to 170-190 DEG C at the rate of 38-42 DEG C/min and maintained for 30-40 min, the temperature of a sample inlet is 175-185 DEG C, the temperature of a detector is 245-255 DEG C, and the split ratio is (5-10): 1, so that simultaneous quantitative detection of various known impurities and unknown impurities in p-methoxypropiophenone is realized, and the detection accuracy is high. Compared with the prior art, the method has the advantages that the quality of the p-methoxypropiophenone can be truly reflected, the monitoring of the synthesis process of the p-methoxypropiophenone can be realized, the quality of the formoterol fumarate product can be improved, the medication risk can be reduced, and the practical value is high.