JPH0562544U - Polymerization reactor - Google Patents

Abstract

(57) [Abstract] [Purpose] When a polymerization resin material is continuously supplied to the inside through an inlet pipe and heated in a nearly complete vacuum state to cause a polymerization reaction, in the process of flowing these inside, An object of the present invention is to make it possible to achieve an optimum stirring state with a stirring blade provided around each shaft coaxially with each other as the degree of polymerization increases successively, without applying an excessive load to the rotating shaft. [Structure] An inlet pipe (2) is provided at one end of the closed tank-shaped body (1) and an outlet pipe (3) is provided at the other end, and a rotation actuating means is provided between one end and the other end of the tank-shaped body (1). A stirring blade (5) is provided around the same axis of the rotating shaft (4) that is connected and rotatably supported so that the distance between the one end and the other end is longer and the surface area is smaller.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, when the polymerization resin material is continuously supplied to the inside through heating in an almost complete vacuum state to cause the polymerization reaction, these are transferred from the inlet pipe side to the opposite outlet pipe side. As the degree of polymerization gradually increases in the course of flow, the optimum stirring state can be achieved without excessive load on the rotating shaft by the stirring blades provided around each axis coaxially with the rotating shaft. Regarding the reactor.

[0002]

[Prior Art]

 As a conventional polymerization reactor, for example, the one shown in FIG. 6 has been proposed. This is provided with an inlet pipe b at one end of the sealed tank-shaped main body a and an outlet pipe c at the other end, respectively, from the outside to the inside, and the rotary operation means is provided between one end and the other end of the tank-shaped main body a. Stirring blades e are provided around the same axis of a rotating shaft d that is rotatably supported by being connected to the stirring blades at substantially the same intervals. As shown in FIG. 7, the tank-shaped main body a has a bottom surface formed in a cross-sectional shape in which two circular arc surfaces are arranged side by side in the lateral direction, and two rotary shafts d corresponding to each circular arc surface are provided. d are provided, and each of them is provided with stirring blades e, which are formed in a shape having disc-shaped opposite portions on both sides thereof and are opposed to each other. In the figure, reference numeral f denotes a stirring piece provided on the tip side of the stirring blade e orthogonally thereto. In addition, in such a tank-shaped main body a, the inside is placed in a substantially completely empty state, and a vacuum discharge pipe for discharging the by-product generated inside to the outside, and an inside between the wall body formed in the double wall. Although heating means for heating each are provided, they are not shown.

In such a polymerization reactor, a polymerization resin material is continuously supplied to the inside through an inlet pipe b to heat it in a substantially complete vacuum state, and at the same time, a rotating shaft d is operated to operate a rotation operating means. By rotating with the stirring blade e provided around the same axis, the mixture is agitated, and in the process of flowing from the inlet pipe b side to the opposite outlet pipe c side, the polymerization degree is gradually increased to The polymer is taken out through the pipe c.

[0004]

[Problems to be solved by the device]

 However, in such a polymerization reactor, the degree of polymerization of the polymer is higher on the side of the outlet pipe c than on the side of the inlet pipe b, and the melt viscosity is higher. When the rotating shaft d is rotated by means of a high degree of polymerization of the polymer on the outlet pipe c side, an excessive load is applied to the rotating shaft d, and the degree of polymerization of the polymer on the outlet pipe c side is adjusted accordingly. When the rotating shaft d is rotated, there is a problem that the mixing and stirring of the polymer on the inlet pipe b side becomes insufficient.

As a result, it is necessary to prolong the residence time of the polymer in the polymerization reactor, and it is inevitable that the generation of by-products and the resulting deterioration in quality and operability will be unavoidable.

The polymerization reactor according to the present invention was devised in view of the above conventional problems, in which the polymerization resin raw material is continuously supplied to the inside through an inlet pipe, and the polymerization reaction is performed under a substantially complete vacuum state. When heating and causing a polymerization reaction, in the process in which these flow from the inlet pipe side to the outlet pipe side on the opposite side, the agitation provided around each axis coaxially with the rotating shaft at each part The purpose of this is to achieve the optimum agitation state with the blades without excessive load on the rotating shaft.

[0007]

[Means for Solving the Problems]

 In order to achieve such an object, according to claim 1 of the present invention, an inlet pipe is provided at one end of the sealed tank-shaped body and an outlet pipe is provided at the other end thereof from the outside to the inside, and the tank-shaped main body is provided. A polymerization reaction is provided between one end and the other end of the stirring shaft, which is rotatably supported by connecting it to the rotation actuating means. Configured machine. Further, in claim 2, the stirring blades are provided around the same axis of the rotating shaft from one end side to the other end side with increasing intervals, and in claim 3, the stirring blades are provided on both sides of the disk shape. It has been illustrated that the surface area is reduced by forming the shape having a facing cutout portion and increasing the cutout portion sequentially from one end side to the other end side.

[0008]

[Action]

 Thus, in such a polymerization reactor, the polymerization resin material is continuously supplied to the inside of the tank-shaped body through the inlet pipe to heat it in a substantially complete vacuum state, and the rotating shaft is operated by the rotation operating means. By rotating with the stirring blades, the mixing blades are mixed and stirred by the stirring blades provided around the same axis, and in the process in which these flow from the inlet pipe side to the opposite outlet pipe side, the degree of polymerization is gradually increased and the polymer is passed through the outlet pipe. It is the one to take out.

[0009]

【Example】

 The details of the polymerization reactor according to the present invention will be described with reference to the accompanying drawings.

In the illustrated embodiment, as an example of such a polymerization reactor, a pellet-like shape was formed for the purpose of continuously producing the polyester ether copolymer that the applicant has now come up with. A horizontal polycondensation reactor will be described in which the polyester and the polyethers are melt-mixed with each other, or while being melt-mixed, the polycondensation reaction is carried out by supplying the polyester to the inside.

As shown in FIG. 1, this polymerization reactor is provided with an inlet pipe 2 at one end and an outlet pipe 3 at the other end of the sealed tank-shaped main body 1 from the outside to the inside. Between the one end and the other end of the main body 1, which is rotatably supported by being connected to the rotation actuating means, the stirring blades 5 are successively arranged from one end side to the other end side around the same axis of the rotary shaft 4 so as to increase the surface area. It is made smaller. As shown in FIGS. 2 to 5, the tank-shaped main body 1 has a bottom surface formed in a cross-sectional shape in which two arcuate surfaces are arranged side by side in the lateral direction, and two rotary shafts 4 are provided corresponding to each arcuate surface. The stirring blades 5 each having a disk-like shape and having notched portions facing each other on both sides of the disc are formed, and the notched portions are sequentially increased from the one end side to the other end side to reduce the surface area. Are placed at different positions. Reference numeral 6 in the drawing denotes a stirring piece provided on the tip side of the stirring blade 5 so as to be orthogonal to this. In addition, the inside of the tank-shaped body 1 is kept under a substantially complete vacuum state, and the inside is heated between the vacuum discharge pipe for discharging the by-product generated inside to the outside and the wall formed in the double wall. Although heating means for heating are provided respectively, they are not shown.

In such a polymerization reactor, pelletized polyester and polyethers are melted in the tank-shaped body 1 through the inlet pipe 2 or are continuously supplied while being melt-mixed. , The internal pressure is, for example, 0.5 to 1.0 mmHg · abs in a substantially complete vacuum state, and then heated to, for example, about 260 to 275 ° C., and the rotary shaft 4 is operated by the rotary operation means. By rotating, mixing and stirring are carried out by the stirring blade 5 provided around the same axis and the stirring piece 6 provided therein, and these are sequentially polymerized in the process of flowing from the inlet pipe 2 side to the opposite outlet pipe 3 side. The polyester ether copolymer is taken out through the outlet pipe 3 at a high temperature.

In the illustrated embodiment, in addition to sequentially decreasing the surface area of the stirring blade 5 from one end side to the other end side, the stirring pieces 6 provided on the stirring blade 5 can also be sequentially decreased in surface area. , Considered.

Further, the stirring blades 5 may be provided from one end side to the other end side, for example, every two or more, the intervals may be sequentially lengthened or the surface area may be reduced.

Such a structure can also be adopted in a polymerization reactor for continuously polymerizing a polymerization resin such as polyamide, polycarbonate, or polyester carbonate.

It can also be used in a vertical polymerization reactor.

[0017]

[Effect of the device]

 The polymerization reactor according to the present invention as described above continuously supplies the polymerization resin raw material through the inlet pipe, heats it in a nearly complete vacuum state, and causes the polymerization reaction when the polymerization reaction is performed. As the degree of polymerization gradually increases in the process of flowing from the opposite side to the outlet pipe side, the optimum stirring state is provided by the stirring blades provided around each axis coaxially with the rotating shaft in each part, and an excessive load is applied to the rotating shaft. It can be achieved without this.

Further, by relatively shortening the residence time of the polymer in the polymerization reactor, generation of by-products, deterioration of quality due to this, and deterioration of operability do not become a problem.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an example of a polymerization reactor according to the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view taken along line BB in FIG.

FIG. 4 is a sectional view taken along the line CC in FIG.

5 is a cross-sectional view taken along the line DD of FIG.

FIG. 6 is a vertical sectional front view showing an example of a conventional polymerization reactor.

FIG. 7 is a vertical sectional side view of this.

[Explanation of symbols]

 1 Tank-shaped main body 2 Inlet pipe 3 Outlet pipe 4 Rotating shaft 5 Stirring blade 6 Stirring piece

Claims (3)

[Scope of utility model registration request] 1. A closed tank-shaped main body is provided with an inlet pipe at one end and an outlet pipe at the other end as seen from the outside to the inside, and is connected to a rotation actuating means between one end and the other end of the tank-shaped main body. Then, a polymerization reactor is provided around the same axis of the rotation shaft that is rotatably supported, with stirring blades having a longer interval from one end side to the other end side and a smaller surface area. 2. The polymerization reactor according to claim 1, wherein stirring blades are provided around the axis of rotation about the same axis from one end side to the other end side with a longer interval. 3. The stirring blade is formed in a shape having notch portions facing each other on both sides of a disk shape, and the notch portions are sequentially increased from one end side to the other end side to reduce the surface area. The polymerization reactor according to claim 1 or 2.