Catalyst for preparing epoxy propane by propylene liquid-phase epoxidation reaction and preparation method thereof

A technology for propylene oxide and catalyst, applied in the unique preparation field of the catalyst, can solve the problems of serious pollution, corrosion of equipment, restricting economic benefits, etc., and achieve the effects of high selectivity, low production cost and high product purity

Active Publication Date: 2011-08-03
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chlorohydrin method uses chlorine gas as the raw material, and the process is mature, but the pollution is serious and the equipment is corroded
The indirect oxidation method uses tert-butanol hydroperoxide and ethylbenzene hydroperoxide as oxidants, which overcomes the disadvantages of environmental pollution and serious equipment corrosion in the chlorohydrin method, but a large amount of co-oxidation will be produced while producing propylene oxide. By-products, greatly restricting economic benefits

Method used

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  • Catalyst for preparing epoxy propane by propylene liquid-phase epoxidation reaction and preparation method thereof
  • Catalyst for preparing epoxy propane by propylene liquid-phase epoxidation reaction and preparation method thereof
  • Catalyst for preparing epoxy propane by propylene liquid-phase epoxidation reaction and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Take 2g P 123 , 0.2g of cetyltrimethylammonium bromide (CTAB), 45g of 2M hydrochloric acid and 15g of water were put into a 100ml round bottom flask, and after stirring at 40°C for 6 hours, 5.7g of tetraethyl orthosilicate (TEOS) was added, Continue to stir for 20 hours and move into the reaction kettle, crystallize at 100 ° C for 24 hours, after suction filtration, washing and drying, heat the solid product to reflux in a mixed solution of ethanol and 2M hydrochloric acid for 12 hours, (in the above mixed solution, ethanol The mass ratio with 2M hydrochloric acid is 70:5), and after suction filtration, washing and drying, the SBA-15 carrier after ethanol extraction of the template agent was obtained.

[0024] Get 3g of the SBA-15 carrier after the ethanol extraction template agent is put into the quartz reaction tube that chemical vapor deposition (CVD) uses, heat to 700 ℃, with the N of 150ml / min 2 As the carrier gas, put TiCl 4 Steam is brought into the SBA-15 bed ...

Embodiment 2

[0026] The chemical vapor deposition time in Example 1 was changed to 1.0, 1.5, 2.0, 2.5, and 3.0 hours to obtain catalysts 2# to 6#. See Table 1 for catalyst performance evaluation.

Embodiment 3

[0028] Change the chemical vapor deposition time in Example 1 to 1.5 hours, and change the chemical vapor deposition temperature to 500, 600, 650, 750, 800, 850, and 900°C to obtain 7# to 13# catalysts. The catalyst performance evaluation is shown in Table 1 .

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Abstract

The invention discloses a catalyst for preparing epoxy propane by one-step liquid phase oxidation based on isopropyl benzene hydroperoxide as an oxidant and a preparation method thereof. The catalyst is Ti-SBA-15 porous material and is characterized in that titanium is loaded on SBA-15 material by using a chemical vapor deposition method, wherein the SBA-15 has the pore diameter from 6 nanometersto 7 nanometers and a hexagonal structure, and a template agent in the SBA-15 is removed by using an ethanol extraction method. Ti-SBA-15 which is prepared by means of 1.5-hour chemical vapor deposition at 700 DEG C is used as a catalyst, reaction is performed for 4 hours at 2.4MPa and 80 DEG C, the conversion rate of isopropyl benzene hydroperoxide can reach 87%, and the selectivity of epoxy propane can reach 96%. The catalyst is simple in preparation and easy in post-reaction separation, can be recycled many times, and has high chemical stability. The reaction process for preparing epoxy propane by one-step propylene epoxidation, in which the Ti-SBA-15 prepared by using the method provided the invention is used as the catalyst, has the characteristics of few byproducts, simple treatmentof reaction liquid, good environmental friendliness and the like.

Description

technical field [0001] The present invention relates to a kind of cumene hydrogen peroxide is used as oxidant, the catalyst and preparation method of liquid phase one-step oxidation propylene to produce propylene oxide, described catalyst is Ti-SBA-15 mesoporous molecular sieve catalyst, relate to this catalyst at the same time Unique preparation method. technical background [0002] Propylene oxide (PO) is an important organic chemical raw material, which can be used to produce propylene glycol, polyether polyols and nonionic surfactants. It is the third largest organic chemical industry in the production of propylene derivatives after polypropylene and acrylonitrile product. At present, the industrial production of propylene oxide mainly includes the chlorohydrin method and the Halcon method (indirect oxidation method). The chlorohydrin method uses chlorine gas as a raw material, and the process is mature, but the pollution is serious and the equipment is corroded. The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/89C07D303/04C07D301/19
CPCY02P20/50Y02P20/52
Inventor 卢冠忠姚军明郭杨龙郭耘王艳芹张志刚王筠松龚学庆
Owner EAST CHINA UNIV OF SCI & TECH
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