Device and method for continuously isomerizing epoxide

Abstract

The invention relates to a device and a method for continuously isomerizing epoxide, which can be used for continuous isomerizing preparation of corresponding allyl alcohol products from epoxide. Themethod comprises steps as follows: reaction raw materials and carrier gas are preheated to certain temperature, the raw materials are contacted with a regenerated catalyst and a newly supplemented catalyst in a fluidized state in a fluidized bed reactor at a certain air speed, an isomerization reaction is performed under certain pressure, reaction gas and a carbon deposit catalyst are obtained through separation in a settler, wherein reaction gas rises and enters a product separation system via a reaction liquid pipeline at the top of the settler, the carbon deposit catalyst enters a regenerator for regeneration, and the regenerated catalyst returns to a lifting pipe reactor via a regenerated catalyst pipeline. The process has the characteristics of high atom economy, product yield and selectivity and no pollution and is notably superior to a current slurry bed process.

Description

technical field

[0001] The invention relates to a circulating fluidized bed process and its application in continuous isomerization, in particular to a device and method for continuous isomerization of epoxides, which can be used for continuous isomerization of epoxides to prepare corresponding allyl Alcohol products. Background technique

[0002] Allyl alcohol is an important chemical intermediate and fine chemical product. Because the molecular structure contains two functional groups, double bond and hydroxyl, it can participate in oxidation, reduction, esterification, etherification and addition, etc. It is used in chemicals, medicine , spices and organic synthesis have a wide range of uses. The main derivatives and their uses are: for the synthesis of epichlorohydrin, glycerin, 1,4-butanediol and allyl ketone and other important organic synthetic raw materials, and its important derivative allyl ester is mainly used as a raw material for the production of polymers. mo...

Examples

Embodiment 1

[0060] The reactor used in this process is as figure 1 The shown two-stage riser fluidized bed reactor has an inner diameter of 40 mm and a height of 4 meters; the outlet of the second stage of the riser reactor is located in the settler to realize rapid separation of catalyst, reactant and product, and the reaction product sent to the subsequent separation system.

[0061] First, heat nitrogen and propylene oxide to 280°C and enter the riser to contact with the regenerated catalyst and new supplementary catalyst. The nitrogen flow rate is 10L / min, the feed rate of propylene oxide is 7.8kg / h, and the circulating catalyst is 3.9kg / h. The feed rate of the catalyst is 3.9g / h, the temperature of the heat transfer oil outside the riser is 280°C, the contact time between the material and the catalyst in the riser reactor is 3 seconds, the outlet temperature of the riser is 290°C, and the outlet reaction liquid and the catalyst mixture are exchanged The heater can be cooled to 180°C...

Embodiment 2

[0070] The difference from Example 1 is that the isomerization performance at different preheating temperatures was investigated. See Table 2.

[0071] Table 2: Response performance results at different temperatures

[0072] Preheating temperature / ℃

Embodiment 3

[0074] The difference from Example 1 is that the influence of different cooling temperatures on the final reaction performance was investigated, see Table 3.

[0075] Table 3: Response performance at different cooling temperatures

[0076]

[0077]

technical field

[0001] The invention relates to a circulating fluidized bed process and its application in continuous isomerization, in particular to a device and method for continuous isomerization of epoxides, which can be used for continuous isomerization of epoxides to prepare corresponding allyl Alcohol products. Background technique

[0002] Allyl alcohol is an important chemical intermediate and fine chemical product. Because the molecular structure contains two functional groups, double bond and hydroxyl, it can participate in oxidation, reduction, esterification, etherification and addition, etc. It is used in chemicals, medicine , spices and organic synthesis have a wide range of uses. The main derivatives and their uses are: for the synthesis of epichlorohydrin, glycerin, 1,4-butanediol and allyl ketone and other important organic synthetic raw materials, and its important derivative allyl ester is mainly used as a raw material for the production of polymers. mo...

Examples

Embodiment 1

[0060] The reactor used in this process is as figure 1 The shown two-stage riser fluidized bed reactor has an inner diameter of 40 mm and a height of 4 meters; the outlet of the second stage of the riser reactor is located in the settler to realize rapid separation of catalyst, reactant and product, and the reaction product sent to the subsequent separation system.

[0061] First, heat nitrogen and propylene oxide to 280°C and enter the riser to contact with the regenerated catalyst and new supplementary catalyst. The nitrogen flow rate is 10L / min, the feed rate of propylene oxide is 7.8kg / h, and the circulating catalyst is 3.9kg / h. The feed rate of the catalyst is 3.9g / h, the temperature of the heat transfer oil outside the riser is 280°C, the contact time between the material and the catalyst in the riser reactor is 3 seconds, the outlet temperature of the riser is 290°C, and the outlet reaction liquid and the catalyst mixture are exchanged The heater can be cooled to 180°C...

Embodiment 2

[0070] The difference from Example 1 is that the isomerization performance at different preheating temperatures was investigated. See Table 2.

[0071] Table 2: Response performance results at different temperatures

[0072] Preheating temperature / ℃

Embodiment 3

[0074] The difference from Example 1 is that the influence of different cooling temperatures on the final reaction performance was investigated, see Table 3.

[0075] Table 3: Response performance at different cooling temperatures

[0076]

[0077]

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