Device and method for polycondensation of polyol by using cyclic compound

Abstract

The invention provides a device for polycondensation of polyol by using a cyclic compound, the device comprises a reaction kettle, a first micro-interface generator is arranged at the bottom layer in the reaction kettle, and a second micro-interface generator is arranged at the middle layer in the reaction kettle; a first one-way channel used for preventing materials from flowing reversely is arranged between the first micro-interface generator and the second micro-interface generator, a second one-way channel is arranged above the second micro-interface generator, and a polyhydric alcohol pipeline and an annular compound pipeline are arranged on the side edge of the bottom of the reaction kettle. The first micro-interface generator is connected with the annular compound pipeline and is used for introducing a vaporized annular compound for dispersing and crushing, and a polycondensation product pipeline is arranged at the top of the reaction kettle. By applying the micro-interface enhanced reaction technology, the consumption rate of the cyclic compound gas can be greatly increased, the partial pressure of the cyclic compound in the gas phase is effectively reduced, and the intrinsic safety of equipment is greatly improved.

Description

technical field

[0001] The invention belongs to the technical field of high molecular polymers, and in particular relates to a device and method for polycondensation of polyols by using cyclic compounds. Background technique

[0002] Condensation polymerization reaction, referred to as polycondensation reaction, refers to the reaction in which one or more monomers condense with each other to form a polymer, and its main product is called a polycondensate. The monomer of the condensation polymerization reaction is a compound with two (or more) reactive functional groups. When polymerizing, it removes small molecules to form a polymer, so the molecular weight of the repeating structural unit of the polymer is smaller than that of the monomer.

[0003] Most of the existing polycondensation reactions use a stirred tank reactor, which has the advantages of compact structure, simple equipment, high process operation flexibility, large stirring power, and suitable for the productio...

Examples

Embodiment

[0054] refer to figure 1 Shown is a schematic structural diagram of a device for polycondensation of polyols using cyclic compounds provided by the present invention. The device includes a reactor 10, the reactor 10 is divided into bottom, middle and top three parts, the bottom and the middle are separated by the first one-way channel 111, and the middle and the top are separated by the second one-way channel 121. In this embodiment, the cyclic compound is selected as propylene oxide, and the polyol is ethylene glycol.

[0055] First, a first micro-interface generator 11 is provided at the bottom of the reaction kettle 10 . The first micro-interface generator 11 is arranged on the center line of the reaction kettle 10 . The polyol pipeline 13 enters the reactor 10 through the side wall at the bottom of the reactor 10, and ethylene glycol is passed into the reactor 10, and the cyclic compound pipeline 14 also enters the reactor 10 through the side wall at the bottom of the re...

technical field

[0001] The invention belongs to the technical field of high molecular polymers, and in particular relates to a device and method for polycondensation of polyols by using cyclic compounds. Background technique

[0002] Condensation polymerization reaction, referred to as polycondensation reaction, refers to the reaction in which one or more monomers condense with each other to form a polymer, and its main product is called a polycondensate. The monomer of the condensation polymerization reaction is a compound with two (or more) reactive functional groups. When polymerizing, it removes small molecules to form a polymer, so the molecular weight of the repeating structural unit of the polymer is smaller than that of the monomer.

[0003] Most of the existing polycondensation reactions use a stirred tank reactor, which has the advantages of compact structure, simple equipment, high process operation flexibility, large stirring power, and suitable for the productio...

Examples

Embodiment

[0054] refer to figure 1 Shown is a schematic structural diagram of a device for polycondensation of polyols using cyclic compounds provided by the present invention. The device includes a reactor 10, the reactor 10 is divided into bottom, middle and top three parts, the bottom and the middle are separated by the first one-way channel 111, and the middle and the top are separated by the second one-way channel 121. In this embodiment, the cyclic compound is selected as propylene oxide, and the polyol is ethylene glycol.

[0055] First, a first micro-interface generator 11 is provided at the bottom of the reaction kettle 10 . The first micro-interface generator 11 is arranged on the center line of the reaction kettle 10 . The polyol pipeline 13 enters the reactor 10 through the side wall at the bottom of the reactor 10, and ethylene glycol is passed into the reactor 10, and the cyclic compound pipeline 14 also enters the reactor 10 through the side wall at the bottom of the re...

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