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Preparation method of propylene epoxide

A technology of propylene oxide and propylene, which is applied in the field of biomimetic catalytic propylene epoxidation to prepare propylene oxide, can solve the problems of difficult control of the reaction system and easy deactivation of the catalyst, and achieve improved safety, high selectivity, and excellent reaction operation simple effect

Active Publication Date: 2015-11-25
HUIZHOU RES INST OF SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent ZL201010239648.6 discloses a method for preparing propylene oxide by metalloporphyrin-catalyzed epoxidation of propylene, which uses acrolein and its derivatives as co-reducing agents, but the acrylic acid series compounds produced are easy to polymerize in the system , making it difficult to control the reaction system, and the catalyst is easily deactivated

Method used

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  • Preparation method of propylene epoxide
  • Preparation method of propylene epoxide
  • Preparation method of propylene epoxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Contain 0.1mmol cobalt phthalocyanine in 25mL (R=H in general formula (I), M 1 =Co) in the acetonitrile solution, add 0.01mol of isoprene, respectively charge 0.8MPa of propylene and 1.2MPa of oxygen, and carry out the stirring reaction at a temperature of 30°C. After chromatographic analysis, the conversion rate of propylene is 26 %, the selectivity of propylene oxide is 94%.

Embodiment 2

[0024] Contains 1.0 x 10 in 25mL -3 mmol tetracarboxy copper phthalocyanine (R=COOH in general formula (I), M 1 =Cu) in the acetonitrile solution, add 5.0mmol isoprene, respectively charge 0.1MPa of propylene and 0.2MPa of oxygen, and carry out stirring reaction at a temperature of 50°C. After chromatographic analysis, the conversion rate of propylene is 38%. , the selectivity of propylene oxide is 95%.

Embodiment 3

[0026] Contains 1.5 x 10 in 25mL -3 mmol p-nitrotetraphenylruthenium porphyrin chloride (R in general formula (II) 3 = NO 2 , R 1 = R 2 = R 4 = R 5 =H,M 3 =Ru,X=H,X 1 =Cl) in the acetonitrile solution, add 0.2mol of isoprene, respectively charge 0.4MPa of propylene and 0.6MPa of oxygen, and carry out stirring reaction at a temperature of 60°C. After chromatographic analysis, the conversion rate of propylene is 56 %, the selectivity of propylene oxide is 96%.

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Abstract

The invention discloses a preparation method of propylene epoxide. According to the method, propylene serves as the raw material, oxygen serves as an oxidizing agent, organic solvent and auxiliaries are added, metalloporphyrin compounds serve as catalysts, and the catalytic reaction is controlled to be conducted under the condition that the reaction temperature is 30-140 DEG C and the reaction pressure is 0.3-3.0 MPa to obtain propylene epoxide. The preparation method has the advantages of being gentle in reaction condition, good in catalysis effect, high in propylene epoxide selectivity, simple in process, and the like.

Description

technical field [0001] The invention relates to a method for preparing propylene oxide, in particular to a method for preparing propylene oxide through biomimetic catalyzed epoxidation of propylene. Background technique [0002] Propylene oxide (PO) is the third largest organic chemical product in propylene derivatives after polypropylene and acrylonitrile. Propylene oxide is widely used. In addition to producing polyether polyols and glycerin, it can also be used to produce propylene glycol, nonionic surfactants, oil field demulsifiers, pesticide emulsifiers and wetting agents. With the expansion of the use of propylene oxide and the continuous growth of the use of downstream products, the market demand for propylene oxide is increasing year by year. [0003] At present, the main methods for industrially producing propylene oxide are chlorohydrin method, co-oxidation method (also known as indirect oxidation method, or Halcon method) and hydrogen peroxide oxidation method (...

Claims

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Application Information

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IPC IPC(8): C07D301/08C07D303/04
CPCY02P20/52C07D301/08C07D303/04
Inventor 纪红兵周贤太李扬
Owner HUIZHOU RES INST OF SUN YAT SEN UNIV