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Micro-interface system and method for preparing poly (butylene succinate)

A technology of polybutylene succinate and succinic acid, which is applied in separation methods, chemical instruments and methods, mixers, etc., can solve the problem of excessive intermediate reaction products, low esterification reaction activity, low production efficiency, etc. problems, to achieve the effect of increasing the reaction rate, uniform concentration distribution, and improving production efficiency and output ratio

Pending Publication Date: 2022-04-29
NANJING YANCHANG REACTION TECH RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, succinic anhydride can be obtained directly after maleic anhydride is hydrogenated, and succinic acid can only be obtained through hydrolysis. During esterification and polycondensation, the hydrolyzed water needs to be removed, which leads to high energy consumption, large amount of sewage, and too many intermediate reaction products. , there is a large amount of sewage in the reaction process, low activity of esterification reaction, and low production efficiency

Method used

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  • Micro-interface system and method for preparing poly (butylene succinate)

Examples

Experimental program
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Effect test

Embodiment 1

[0043] refer to figure 1 Shown, a kind of structural schematic diagram of the micro-interface system that prepares polybutylene succinate provided by the present invention, comprises mixing tank 10, and mixing tank 10 is the catalyzer that the catalyst pipeline 11 of the top comes, the butanediol of side wall The succinic acid from the acid pipeline 12 is mixed with the 1,4 butanediol from the 1,4 butanediol pipeline 13, and then sent to the esterification reactor 20. The esterification reactor 20 is provided with a linked micro-interface generator 21, which mainly includes a hydraulic micro-interface generator 211, a pneumatic micro-interface generator 212 and a communication pipe 213. The hydraulic micro-interface generator 211 is arranged directly above the pneumatic micro-interface generator 212 , and the hydraulic micro-interface generator 211 and the pneumatic micro-interface generator 212 are connected through a communication pipe 213 . The hydraulic micro-interface ge...

Embodiment 2

[0047] The other operating steps are the same as in Example 1, the only difference being that the linked micro-interface generator consists of two pneumatic micro-interface generators. At this time, the temperature of the esterification reaction was 170° C., the temperature of the vacuum polycondensation was 240° C., and the pressure was 0.005 MPa.

Embodiment 3

[0049] The other operating steps are the same as those in Example 1, the only difference being that the hydraulic micro-interface generator and the pneumatic micro-interface generator are set horizontally.

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Abstract

The invention provides a micro-interface system for preparing poly (butylene succinate), which comprises a mixing tank for premixing succinic acid, 1, 4-butanediol and a catalyst, the mixing tank is connected with an esterification reactor, the esterification reactor is internally provided with a linkage micro-interface generator, the linkage micro-interface generator is connected with a circulating pump, and the circulating pump is connected with the esterification reactor. And a rectifying tower and a vacuum polycondensation tower are sequentially connected behind the esterification reactor. The linkage type micro-interface generator is arranged in the esterification reactor, and succinic acid, 1, 4-butanediol and a catalyst are dispersed and crushed, so that the succinic acid, the 1, 4-butanediol and the catalyst can be mutually dissolved better, the solution temperature and the concentration distribution are more uniform, the turbulence degree of the solution is greatly enhanced, a solid-liquid phase boundary layer is further thinned, and the reaction efficiency is improved. The reaction efficiency is greatly improved, the production cost is saved, and the production efficiency and the output ratio are improved.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to a micro-interface system and method for preparing polybutylene succinate. Background technique [0002] Polybutylene succinate (PBS) is prepared by polycondensation of succinic acid and butanediol. Its monomers come from a wide range of sources. It is not only prepared from petroleum resources, but can also be prepared by biological fermentation. PBS is a typical semi-crystalline thermoplastic aliphatic polyester plastic, with good biodegradability, excellent mechanical properties, between polyethylene and polypropylene, with good transparency, gloss and printing performance , excellent molding and processing performance, is a kind of green environment-friendly polymer polyester material with broad application prospects in synthetic biodegradable materials. [0003] PBS can be used in the national economy and people's livelihood fields such as packaging mat...

Claims

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Application Information

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IPC IPC(8): B01J19/00B01F33/80B01D3/00C08G63/16C08G63/78
CPCB01J19/0093B01D3/009C08G63/16C08G63/785
Inventor 张志炳孙海宁李磊张锋周政杨国强杨高东孟为民
Owner NANJING YANCHANG REACTION TECH RES INST CO LTD