31 results about "3-Hexanone" patented technology

The invention relates to a method for catalyzing and dehydrating 4-hydroxy-3-hexanone, which mainly solves the problems of low catalyst activity, high reaction temperature and low airspeed in the prior art. In the method, the 4-hydroxy-3-hexanone is adopted as a raw material; the reaction raw material and a catalyst contact to prepare 4-hydroxy-3-ketone under the condition that the reaction temperature is between 200 to 400 DEG C and the quality airspeed is 0.5 to 15 hours corresponding to 4-hydroxy-3-hexanone liquid; the technological scheme that the catalyst is HZSM-5 zeolite, the grain diameter of the zeolite is less than 5 micrometers and the molar ratio of SiO2 to Al2O3 is 1: 0.003 to 0.05 to solve the problem; and the method is suitable for industrial production for preparing the 4-hydroxy-3-ketone by the 4-hydroxy-3-hexanone.

The invention relates to a method of 4-hydroxy-3-hexanone catalysis and dehydration, which mainly solves the problems of low activity of a catalyst, high reaction temperature, and low space velocity in the prior art. Aiming at well solving the problems, the method adopts the technical scheme that the 4-hydroxy-3-hexanone is used as a raw material, and the reaction raw material comes into contact with the catalyst to generate 4-hexene-3-ketone when the reaction temperature is 200 to 400 DEG C and the liquid weight hourly space velocity is 0.5 to 15 h<-1> relative to the 4-hydroxy-3-hexanone; and the catalyst is prepared by the following components in parts by weight: (a) 0.5 to 30 parts of heteropoly acid, and (b) 70 to 99.5 parts of alumina, wherein at least one of H3PMo12O40.nH2O, H4SiW12O40.nH2O or H3PW12O40.nH2O is adopted as the heteropoly acid, and n is 0 to 10. The method can be used for the industrial production of the 4-hexene-3-ketone prepared by the 4-hydroxy-3-hexanone.

The invention relates to a method for preparing 4-hexene-3-ketone by carrying out dehydration on 4-hydroxy-3-hexanone, mainly aiming at solving the problems of low catalyst activity, high reaction temperature and slow space velocity in the prior art. The catalyst used by the method is prepared by the following steps of: mixing a silicon source, an aluminium source, template agent R1, template agent R2 and water, and adjusting the pH of the reaction mixture to be 8-14 with inorganic base; in the reaction mixture, controlling the molar ratio between Al2O3 and SiO2 to be 0.003-0.05, controlling the molar ratio of R1 to SiO2 to be 0.1-2, controlling the molar ratio of H2O to SiO2 to be 10-100 and controlling the molar ratio of R2 to SiO2 to be 0.05-2; and carrying out hydrothermal crystallization on the mixture for 1-10 days at the temperature of 100-250 DEG C to obtain the catalyst, wherein R1 comprises at least one selected from tetramethyl ammonium hydroxide, tetraethyl ammonium hydroxide, tetrapropyl ammonium hydroxide or tetrabutyl ammonium hydroxide, and R2 comprises at least one selected from beta-diketone, beta-diketone salt, oxalic acid, oxalate, catechol or 8-hydroxyquinoline. The technical scheme better solves the problems, and can be used in the industrial production of the 4-hexene-3-ketone prepared by the 4-hydroxy-3-hexanone.

A synthesis method of 3,4-hexanedione comprises a step of 4-hydroxy-3-hexanonen oxidation, and in the step of 4-hydroxy-3-hexanonen oxidation, water is used as a catalyst, acetic acid is used as a cocatalyst, and ozone is used as an oxidizing agent to carry out an oxidation reaction on 4-hydroxy-3-hexanonen, and after the reaction, distillation under reduced pressure is carried out to obtain the 3,4-hexanedione. According to the synthesis method of 3,4-hexanedione in the invention, in the process of 4-hydroxy-3-hexanone oxidation, the 4-hydroxy-3-hexanone is placed in the water, the ozone is used for oxidation on the 4-hydroxy-3-hexanone, and the acetic acid is used as the cocatalyst, so that the entire oxidation reaction process is mild in conditions and simple to operate, no sewage is produced when the final product (3,4-hexanedione) is obtained, and the yield is greatly increased.

The invention relates to a method for producing 4-hexene-3-one by dehydration of 4-hydroxyl-3-hexanone and mainly solves the problem that catalysts are low in activity, high in reaction temperature and low in space velocity in the prior art. The 4-hydroxyl-3-hexanone is used as material to contact with catalyst at the reaction temperature of 200 DEG C-400 DEG C at weight hourly space velocity of 0.5-15 hours-1 relative to the 4-hydroxyl-3-hexanone so as to generate 4-hexene-3-one. The catalyst is molecular sieve ZSM-11 (zeolite socony mobil-11). The problem is solved well by the application of the technical scheme. The method is applicable to industrial production of 4-hexene-3-one by 4-hydroxyl-3-hexanone.

The invention discloses heat-resisting anti-wear lubricating oil. The lubricating oil is prepared from, by weight, 50-70 parts of base oil, 10-14 parts of allyl isothiocyanate, 6-10 parts of C thiamine pyrimidine, 4-8 parts of 3-thiophenecarboxaldehyde, 3-7 parts of 2-nitro-4-chlorophenol, 2-5 parts of 2-amino-6-chlorobenzothiazole, 9-13 parts of a perfluoroethylene propylene copolymer, 6-12 parts of fumaric acid resin, 10-13 parts of 2-methyl-2-propanethio, 10-20 parts of acetylsalicylic acid, 8-13 parts of diethylene glycol ether and 5-9 parts of 5-methyl-3-hexanone. The lubricating oil has both the good heat resistance and friction resistance by adopting various chemical substances for modifying the base oil.

The invention relates to a method for preparing 4-hexene-3-ketone by 4-hydroxy-3-hexanone dehydration, which mainly solves the problems of low activity of a catalyst, high reaction temperature, and low space velocity in the prior art. Aiming at well solving the problems, the method adopts the technical scheme that the 4-hydroxy-3-hexanone is used as a raw material, and the reaction raw material comes into contact with the catalyst to generate the 4-hexene-3-ketone when the reaction temperature is 200 to 400 DEG C and the liquid weight hourly space velocity is 0.5 to 15 h<-1> relative to the 4-hydroxy-3-hexanone; and the catalyst is a mesoporous/macroporous silica and alumina oxide material with a composite pore structure The method can be used for the industrial production of the 4-hexene-3-ketone prepared by the 4-hydroxy-3-hexanone.

The invention relates to a synthesis method for a compound, in particular to a synthesis method for 2,2-dimethyl-5-(4-bromophenyl)-6-amino-3-hexanone. According to the method, pinacolone and sodium hydroxide serve as raw materials and react with bromobenzaldehyde, an ethanol solution is added dropwise, an ice-water bath is conducted on precipitate, the precipitate reacts with nitromethane, finally, ammonium hydroxide is added for ammoniation, drying is conducted after ice segregation, and 2,2-dimethyl-5-(4-bromophenyl)-6-amino-3-hexanone is obtained. According to the method, reaction conditions are mild, and the yield is high.

The present invention relates to a method of 4-hydroxy-3-hexanone catalytic dehydration, and mainly solves the problem of low catalyst activity, high reaction temperature and low space velocity in the prior art. According to the invention, 4-hydroxy-3-hexanone is used as a raw material, and the reaction raw material is in contact with a catalyst to produce 4-hexen-3-one at the conditions of a reaction temperature of 200-400 DEG C and the space velocity of 0.5-15 hr-1 with respect to the mass of 4-hydroxy-3-hexanone liquid, wherein the catalyst is at least one selected from the group consisting of Al-MCM-41, Al-MCM-48, Al-SBA-15, Al-HMS, Al-MSU-1 or Al-MSU-2. The technical solution solves the problem preferably. The method can be used in the industrial production of 4-hexen-3-one from 4-hydroxy-3-hexanone.

The invention relates to a method for producing 4-hexene-3-one by dehydration of 4-hydroxyl-3-hexanone and mainly solves the problem that catalysts are low in activity, low in reaction temperature and low in space velocity in the prior art. The 4-hydroxyl-3-hexanone is used as material to contact with catalyst at the reaction temperature of 200 DEG C-400 DEG C at the weight hourly space velocity of 0.5-15 hours-1 relative to the 4-hydroxyl-3-hexanone so as to generate 4-hexene-3-one. The catalyst is adhesive-free ZSM-5 (zeolite socony mobil-5). The problem is solved well by the application of the technical scheme. The method is applicable to industrial production of 4-hexene-3-one by 4-hydroxyl-3-hexanone.

The invention relates to a method for preparing 4-hexene-3-ketone by the catalytic dehydration of 4-hydroxyl-3-hexanone, mainly solving the problems of low catalyst activity, high reaction temperature, and low space velocity in the prior art. The method disclosed herein is characterized by using 4-hydroxyl-3-hexanone as a raw material, contacting the raw material with a catalyst to generate 4-hexene-3-ketone under the reaction conditions comprising a reaction temperature being 150-400 DEG C and a space velocity relative to the liquid mass of 4-hexene-3-hexanone being 0.5-15h<-1>, wherein the catalyst is represented by the following structural formula. The method disclosed herein well solves the problems and can be applied in the industrial production of preparing 4-hexene-3-ketone from 4-hydroxyl-3-hexanone.

The invention relates to a method for preparing 4-hexene-3-ketone by carrying out catalytic dehydration on 4-hydroxy-3-hexanone, mainly aiming at solving the problems of low catalyst activity, high reaction temperature and slow space velocity in the prior art. The method takes the 4-hydroxy-3-hexanone as raw material, and can be used for producing the 4-hexene-3-ketone by enabling the reaction raw material to be contacted with catalyst under the conditions that the reaction temperature is 200-400 DEG C and the space velocity relative to the mass of the 4-hydroxy-3-hexanone liquid is 0.5-15h<-1>, wherein the catalyst comprises the components in parts by weight: a) 1-99 parts of pure silicon molecular sieve which is at least one selected from MCM-41, MCM-48, SBA-15, HMS, Silicate-1 or Silicate-2, and b) 1-99 parts of Al2O3 surface coating. The technical scheme better solves the problems, and can be used in the industrial production of the 4-hexene-3-ketone prepared by the 4-hydroxy-3-hexanone.

The invention relates to a preparation method of 4-hexene-3-ketone by virtue of dehydration of 4-hydroxy-3-hexanone, and the method is mainly used for solving the problems in the prior art that the catalyst activity is low, the reaction temperature is high and the space velocity is low. The technical scheme adopted by the invention is as follows: according to the preparation method, 4-hydroxy-3-hexanone which is used as a raw material, is contacted with a catalyst so as to generate 4-hexene-3-ketone under the condition that the reaction temperature is 200-400 DEG C, and the space velocity relative to the liquid weight of 4-hexene-3-ketone is 0.5-15h<-1>, wherein the catalyst comprises the following components in parts by weight: a), 40-95 parts of ZSM-11 molecular sieve with the silicon aluminum mole ratio (SiO2/Al2O3) of 20-300 and the crystal particle diameter of equal to or less than 5 microns and b), 5-6 parts of binding agent, and the ZSM-11 molecular sieve is at least subjected to once acid pickling, so that the problems in the prior art are better solved, and the method can be used in the industrial production of 4-hexene-3-ketone prepared by utilizing 4-hydroxy-3-hexanone.

The invention relates to a catalytic dehydration method of 4-hydroxyl-3-hexanone, mainly solving the problems of low catalyst activity, high reaction temperature, and low space velocity in the prior art. The method disclosed herein is characterized by using 4-hydroxyl-3-hexanone as a raw material, contacting the raw material with a catalyst to generate 4-hexene-3-ketone under the reaction conditions comprising a reaction temperature being 150-400 DEG C and a space velocity relative to the liquid mass of 4-hexene-3-ketone being 0.5-15h<-1>, wherein the catalyst is represented by the following structural formula. The method disclosed herein well solves the problems and can be applied in the industrial production of preparing 4-hexene-3-ketone from 4-hydroxyl-3-hexanone.