Method for producing lactone by cyclic ketone

A cyclic ketone, heteroatom molecular sieve technology, applied in chemical instruments and methods, formation/introduction of carboxylate groups, molecular sieve catalysts, etc. , high requirements, to achieve the effects of simple preparation, catalytic oxidation activity, good catalytic activity stability, and high lactone selectivity

Active Publication Date: 2012-02-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the literature [J Mol Catal A: Chem 243 (2006) 264-277], titanium-silicon molecular sieves treated with zinc acetate and the like are used as catalysts, and the zinc content is fixed at about 4.5%, which is used for propylene epoxidation. However, zinc, The ratio change of silicon and titanium and its influence on the performance of propylene epoxidation reaction have not been regulated and restricted, and the preparation process is complicated and demanding

Method used

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  • Method for producing lactone by cyclic ketone
  • Method for producing lactone by cyclic ketone
  • Method for producing lactone by cyclic ketone

Examples

Experimental program
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Embodiment 1

[0030] 10g of zinc oxide and titanium silicon molecular sieve were mechanically mixed at normal temperature and pressure, and calcined at 550°C for 5 hours in an air atmosphere. Characterized by compositional analysis, the mass ratio of zinc-containing compound to heteroatom molecular sieve is 0.2, the molar ratio of Zn / heteroatom is 5, and the molar ratio of Si / heteroatom is 56.

Embodiment 2

[0032] Dissolve zinc carbonate in water, then add 20g of titanium-silicon molecular sieve, mix uniformly at normal temperature and pressure, dry at room temperature, and bake at 650°C for 2 hours in an air atmosphere. Characterized by composition analysis, the mass ratio of zinc-containing compound to heteroatom molecular sieve is 1, the molar ratio of Zn / heteroatom is 2, and the molar ratio of Si / heteroatom is 37.

Embodiment 3

[0034] 20g of zinc hydroxide and titanium silicon molecular sieve were mechanically mixed at normal temperature and pressure, and calcined at 550°C for 5 hours in an air atmosphere. Characterized by compositional analysis, the mass ratio of zinc-containing compound to heteroatom molecular sieve is 5, the molar ratio of Zn / heteroatom is 18, and the molar ratio of Si / heteroatom is 49.

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Abstract

The invention discloses a method for producing lactone by cyclic ketone. The method is characterized by comprising the following step of reacting cyclic ketone, oxidant, solvent and catalyst based on a mol ratio of the cyclic ketone to the oxidant of 1 to 0.5-15 and based on the mass ratio of the solvent to the catalyst of 0-500 to 1 under the conditions of a temperature range from 0 to 160 DEG C and a pressure range from 0.1 to 3MPa, wherein the catalyst and the solvent can be recycled, and the catalyst is a combination of a compound containing zinc and a heteroatom molecular sieve; the mass ratio of the compound containing zinc to the heteroatom molecular sieve in the compound is 0.01-20 to 1; and in the compound containing zinc, the mole ratio of the zinc to the heteroatom in the heteroatom molecular sieve is 0.05-50 to 1, and the mole ratio of silicon to the heteroatom in the heteroatom molecular sieve is 5-250 to 1.

Description

technical field [0001] The present invention relates to a method for producing lactones, and more particularly relates to a method for producing corresponding lactones by catalytically oxidizing cyclic ketones with a composition of zinc-containing compounds and heteroatom molecular sieves. Background technique [0002] Lactone is an important organic synthesis intermediate compound, such as ε-caprolactone, which can generate dimer or polymer polyester when heated, and can be depolymerized by heating under certain conditions. It is mainly used to produce polycaprolactone, ε-caprolactam, adhesives, elastomers, etc. Lactone can also be used as a strong solvent, which has good solubility for some insoluble resins. In addition, lactone is also an important raw material for the production of degradable plastics. Its biocompatibility, non-toxicity, biodegradability and good drug penetration make it widely used in the field of biomedicine. At the same time, because lactone has goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07B41/12C07D313/04C07D309/30B01J29/89
CPCY02P20/584
Inventor 史春风林民朱斌龙立华夏长久汝迎春
Owner CHINA PETROLEUM & CHEM CORP
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