CN214422540U - Process unit for efficiently producing crude 1, 3-propylene glycol from acrolein - Google Patents
Process unit for efficiently producing crude 1, 3-propylene glycol from acrolein Download PDFInfo
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- CN214422540U CN214422540U CN202022618138.1U CN202022618138U CN214422540U CN 214422540 U CN214422540 U CN 214422540U CN 202022618138 U CN202022618138 U CN 202022618138U CN 214422540 U CN214422540 U CN 214422540U
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Abstract
A process unit for efficiently producing crude 1, 3-propylene glycol from acrolein relates to the technical field of chemical equipment and comprises a hydration reactor, an aldehyde recovery tower and a hydrogenation reaction device, wherein the acrolein and water are connected with the hydration reactor through pipelines, and the hydration reactor is sequentially connected with the hydrogenation reaction device, a high-low component tank, a dealcoholization tower, a water recovery device, a heavy component knockout tower, a product tower and a dealdehydization decomposition tower through pipelines. According to the process device for efficiently producing the crude 1, 3-propylene glycol from the acrolein, the acrolein aqueous solution is subjected to a series of treatments such as hydration reaction, hydrogenation reaction, dealcoholization and seed removal to obtain the 1, 3-propylene glycol product with higher purity, and the process device has the advantages of low production cost, low energy consumption and higher industrial yield, and is suitable for large-scale popularization and use.
Description
The technical field is as follows:
the utility model relates to a chemical industry equipment technical field, concretely relates to process units of thick 1, 3-propylene glycol of acrolein high-efficient production.
Background art:
at present, the 1, 3-propylene glycol preparation method mainly adopts a chemical synthesis method taking petrochemical products as raw materials and a biological conversion method taking biomass glycerol as raw materials, relatively speaking, the raw materials of the chemical synthesis method are easy to obtain, the production cost is lower, and the purity of the proposed 1, 3-propylene glycol is lower; the biotransformation method adopts renewable resources such as corn starch and the like as raw materials to carry out microbial fermentation production, but the cultivation difficulty of the method is high, and the industrial yield is low, so that a device for producing the 1, 3-propylene glycol with low cost, low energy consumption, high transformation rate and easy operation is urgently needed.
The utility model has the following contents:
the utility model aims at overcoming the shortcomings of the prior art, providing the process device for efficiently producing the crude 1, 3-propylene glycol by the acrolein, rapidly producing the 1, 3-propylene glycol and having high purity.
In order to solve the problem existing in the background art, the utility model adopts the following technical scheme: comprises a hydration reactor, a water-absorbing agent and a water-absorbing agent, the device comprises an aldehyde recovery tower and a hydrogenation reaction device, acrolein and water are connected with a hydration reactor through pipelines, the hydration reactor is connected with the aldehyde recovery tower through a pipeline, the aldehyde recovery tower is respectively connected with the hydration reactor and the hydrogenation reaction device through an aldehyde circulating pipeline and a pipe end, the hydrogenation reaction device is connected with hydrogen through a pipeline, the hydrogenation reaction device is connected with a high-low component tank through a pipeline, the high-low component tank is respectively connected with the aldehyde recovery tower and a dealcoholization tower through a hydrogen circulating pipeline and a pipeline, the dealcoholization tower is connected with the water recovery device through a pipeline, the water recovery device is respectively connected with the hydration reactor and a heavy component dealcoholization tower through a water circulating pipeline and a pipeline, the heavy component dealcoholization tower is connected with a product tower through a pipeline, the product tower is respectively connected with the product tank and a dealdehydization decomposition tower through a conveying pipeline and a pipeline, and the dealdehydization decomposition tower is connected with recovered aldehyde through a pipeline.
The product is filled with crude 1, 3-propanediol.
The beneficial effects of the utility model are that simple structure, convenient to use through acrolein aqueous solution through a series of processings such as hydration reaction, hydrogenation, dealcoholization and take off a kind, obtains higher purity 1, 3-propylene glycol product, and low cost, low energy consumption of production process, and industrial output is great, is fit for extensive popularization and use.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
The specific implementation mode is as follows:
referring to fig. 1, the present invention specifically adopts the following embodiments: comprises a hydration reactor, a water-absorbing agent and a water-absorbing agent, the device comprises an aldehyde recovery tower and a hydrogenation reaction device, acrolein and water are connected with a hydration reactor through pipelines, the hydration reactor is connected with the aldehyde recovery tower through a pipeline, the aldehyde recovery tower is respectively connected with the hydration reactor and the hydrogenation reaction device through an aldehyde circulating pipeline and a pipe end, the hydrogenation reaction device is connected with hydrogen through a pipeline, the hydrogenation reaction device is connected with a high-low component tank through a pipeline, the high-low component tank is respectively connected with the aldehyde recovery tower and a dealcoholization tower through a hydrogen circulating pipeline and a pipeline, the dealcoholization tower is connected with the water recovery device through a pipeline, the water recovery device is respectively connected with the hydration reactor and a heavy component dealcoholization tower through a water circulating pipeline and a pipeline, the heavy component dealcoholization tower is connected with a product tower through a pipeline, the product tower is respectively connected with the product tank and a dealdehydization decomposition tower through a conveying pipeline and a pipeline, and the dealdehydization decomposition tower is connected with recovered aldehyde through a pipeline. The product is filled with crude 1, 3-propanediol.
When the process device for efficiently producing the crude 1, 3-propylene glycol by the acrolein works, the acrolein and the water are mixed to form an acrolein water solution, the acrolein water solution enters a hydration reactor to carry out hydration reaction, and the acrolein is partially converted into the 3-hydroxypropionaldehyde under the conditions of 38 ℃ and normal pressure under the action of the catalyst. The reaction product enters an aldehyde recovery tower of the acrolein to recover unreacted acrolein, the reacted acrolein returns to a hydration reactor through an aldehyde circulating pipeline to be recycled, the hydration reaction liquid after the aldehyde removal enters a hydrogenation reaction device to carry out hydrogenation reaction with excessive hydrogen under the action of a catalyst, the hydrogenation reaction liquid enters a high-molecular tank in a high-low molecular tank, the hydrogen is separated from the reaction liquid under the pressure of 2.0MPaG and returns to the aldehyde recovery tower through a hydrogen circulating pipeline, a circulating hydrogen compression system is compressed and then is continuously used, the liquid-phase crude 1, 3-propylene glycol product enters a low-molecular tank in the high-low molecular tank which is operated at normal pressure and is subjected to gas-liquid separation, the residual small amount of hydrogen enters a torch, the reaction liquid enters a separation section, the hydrogenated crude 1, 3-propylene glycol mixed liquid is subjected to dealcoholization by a dealcoholization tower, dehydration of a water recovery device and heavy component removal tower to remove weight, entering a product tower, and finally conveying the generated 1, 3-propylene glycol product to a product tank for storage.
In order to ensure that high-quality polymer grade 1, 3-propylene glycol is obtained, an aldehyde-removing decomposition tower is particularly set up to remove aldehyde-containing substances, then the material flow after aldehyde removal is refined again, and the removed aldehyde is recovered.
And the water removed by the water recovery device flows back to the hydration reactor through the water circulation pipeline for recycling.
In conclusion, the process device for efficiently producing the crude 1, 3-propylene glycol from the acrolein obtains the high-purity 1, 3-propylene glycol product through a series of treatments of hydration reaction, hydrogenation reaction, dealcoholization, seed removal and the like of the acrolein aqueous solution, has low production cost, low energy consumption and large industrial yield, and is suitable for large-scale popularization and use.
Claims (2)
1. A process units of crude 1, 3-propanediol of high-efficient production of acrolein, characterized by: comprises a hydration reactor, a water-absorbing agent and a water-absorbing agent, the device comprises an aldehyde recovery tower and a hydrogenation reaction device, acrolein and water are connected with a hydration reactor through pipelines, the hydration reactor is connected with the aldehyde recovery tower through a pipeline, the aldehyde recovery tower is respectively connected with the hydration reactor and the hydrogenation reaction device through an aldehyde circulating pipeline and a pipe end, the hydrogenation reaction device is connected with hydrogen through a pipeline, the hydrogenation reaction device is connected with a high-low component tank through a pipeline, the high-low component tank is respectively connected with the aldehyde recovery tower and a dealcoholization tower through a hydrogen circulating pipeline and a pipeline, the dealcoholization tower is connected with the water recovery device through a pipeline, the water recovery device is respectively connected with the hydration reactor and a heavy component dealcoholization tower through a water circulating pipeline and a pipeline, the heavy component dealcoholization tower is connected with a product tower through a pipeline, the product tower is respectively connected with the product tank and a dealdehydization decomposition tower through a conveying pipeline and a pipeline, and the dealdehydization decomposition tower is connected with recovered aldehyde through a pipeline.
2. The process installation for the efficient production of crude 1, 3-propanediol from acrolein according to claim 1, wherein: the product is filled with crude 1, 3-propanediol.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022618138.1U CN214422540U (en) | 2020-11-12 | 2020-11-12 | Process unit for efficiently producing crude 1, 3-propylene glycol from acrolein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202022618138.1U CN214422540U (en) | 2020-11-12 | 2020-11-12 | Process unit for efficiently producing crude 1, 3-propylene glycol from acrolein |
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| CN214422540U true CN214422540U (en) | 2021-10-19 |
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| CN202022618138.1U Active CN214422540U (en) | 2020-11-12 | 2020-11-12 | Process unit for efficiently producing crude 1, 3-propylene glycol from acrolein |
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