CN104558573A - Polyester production device - Google Patents
Polyester production device Download PDFInfo
- Publication number
- CN104558573A CN104558573A CN201310476497.XA CN201310476497A CN104558573A CN 104558573 A CN104558573 A CN 104558573A CN 201310476497 A CN201310476497 A CN 201310476497A CN 104558573 A CN104558573 A CN 104558573A
- Authority
- CN
- China
- Prior art keywords
- reactor
- production device
- polyester production
- polycondensation reactor
- polyester
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Polyesters Or Polycarbonates (AREA)
Abstract
The invention relates to a polyester production device which comprises a polycondensation reactor, a vacuum static reactor arranged downstream the polycondensation reactor and communicated with the polycondensation reactor, and an extrusion device arranged downstream the vacuum static reactor, wherein temperature in the vacuum static reactor is the same as that in the polycondensation reactor; the vacuum static reactor comprises a housing and a screen mesh; the screen mesh is perpendicular to the axial direction of the housing and is arranged in the housing; a gas emission pipe with a part bent upwards is arranged on the polycondensation reactor. The polyester production device provided by the invention is greatly higher in small molecule removal in the polycondensation process, so as to further prolong the molecular chain of polyester.
Description
Technical field
The present invention relates to a kind of polymer production plant, particularly polyester production device.
Background technology
Polyester has a wide range of applications in fields such as weaving, engineering plastics, drink packs, and its industrial scale is also in rapid expansion.But, in production of polyester, also there are some problems, such as, during polyester eventually poly-reaction process, need to remove the reaction product such as produced small molecules and water.This is because the polycondensation of polyester monocase is a balanced reaction, and reaction equilibrium constant is less, if do not removed small molecules and the water of reaction generation as soon as possible, will affect speed of reaction, even not reach the polymerization degree of requirement.
General polyester for apparatus and method mainly for easy crystalline polyesters of aromatic series such as poly-para Toluic Acid's glycol ester (PET), polybutylene terephthalate (PBT), Poly(Trimethylene Terephthalate) (PTT), polyethylene naphthalates (PEN).The production stage of these polyester generally includes, and is polymerized in stirred vessel, product is entered tank cooling and the pelletizing of last use dicing machine.
The present biodegradable polyesters occurring increasing novel artificial synthesis, aliphatic polyester segment is introduced in its structure, make molecular chain submissiveer, but this also result in the degree of crystallinity of polyester product and the very big change of crystallization velocity, and existing polyester production device and method are not suitable for the polyester of these kinds very much.Such as, the phase after polymerisation, along with the increase of molecular weight of polyesters, melt viscosity increases, and small molecules diffusion removes very difficult, is difficult to increase molecular chain further.
Summary of the invention
For above-mentioned technical problem existing in prior art, the present invention proposes a kind of polyester production device, it can significantly improve removing of polycondensation process small molecular, thus increases the molecular chain of polyester further.
According to the present invention, propose a kind of polyester production device, comprise: polycondensation reactor, be arranged on polycondensation reactor downstream and the vacuum static reactor be communicated with polycondensation reactor, be arranged on the extrusion device of vacuum static reactor downstream, wherein, the temperature in vacuum static reactor is identical with the temperature in polycondensation reactor, and the screen cloth that vacuum static reactor comprises housing and is provided at its inner portion perpendicular to the axis of housing.
According to polyester production device of the present invention, make identical with the temperature in polycondensation reactor of the temperature in vacuum static reactor can continue polycondensation occurs in vacuum static reactor.And the material be fed in vacuum static reactor can be become shallow bid thread by the screen cloth being arranged on vacuum static inside reactor, thus accretion stream surface-area, accelerate micromolecular in material removing, contribute to the carrying out of polycondensation, reach the object of the molecular chain increasing polyester.
In one embodiment, the quantity of screen cloth is multiple, and for be arrangeding in parallel.Multiple screen cloth can make the shallow bid thread in vacuum static reactor occur repeatedly to change, thus repeatedly upgrade the surface of material, the chance that the small molecules increasing internal batch contacts with air, thus accelerate micromolecular in material removing, the molecular chain of polyester can increase further.Should be appreciated that, term " be arranged in parallel " and can not understand according to mathematical meaning, and it even can be regarded as, and the scope of adjacent screen cloth vacuum static reactor is not for intersect each other.
In one embodiment, vacuum static reactor is vertically arrange, and its top entry is connected with the relief outlet of polycondensation reactor, and outlet at bottom is connected with extrusion device.The vacuum reactor of this set makes material can automatic flowing under gravity, facilitates and produces and operation.In a preferred embodiment, between polycondensation reactor and vacuum static reactor, be provided with the Melt Pump driving Flow of Goods and Materials.Material in polycondensation reactor can be drained in vacuum reactor by Melt Pump, and this is very favorable for the poor material of mobility.
In one embodiment, multiple interface that vacuumizes is provided with to remain vacuum by vacuum static reactor in the upstream portion of vacuum static reactor.Vacuum condition is conducive to small molecules in material to external diffusion, can increase further to make the molecular chain of polyester.In addition, vacuum condition also reduces the resistance of Flow of Goods and Materials, is conducive to material smooth outflow in vacuum static reactor.
In one embodiment, the inwall of the housing of vacuum static reactor is provided with drag reduction layer.In a preferred embodiment, drag reduction layer is polytetrafluorethylecoatings coatings or epoxy coating.These coatings can avoid material extension to be attached on the inwall of vacuum reactor, make to produce and operate and can carry out smoothly.
In one embodiment, polycondensation reactor is provided with the gas discharge pipe with bending part upward, bending part comprises vertical section and horizontal section, wherein vertically the bottom of section is connected with polycondensation reactor, upper end is connected with horizontal section, the position that the position of horizontal section is connected with polycondensation reactor higher than vertical section.Should be appreciated that, term " upward " refers to the direction on ground dorsad here, and term " level " is then and horizontal direction general parallel orientation, can not understand in strict accordance with the level in mathematical meaning.By using the gas discharge pipe of this structure, the material entering into vertical section bleeding to polycondensation reactor can be back to polycondensation reactor inside under gravity instead of accumulate in gas discharge pipe, thus not only increase the productive rate of polyester and solve the blocked problem of gas discharge pipe, make to produce and operate and can carry out smoothly.In a preferred embodiment, the temperature of vertical section is lower than the temperature in polycondensation reactor.This is conducive to the cohesion of the material being in vertical section, thus improves the quantity of reflux of material, and then improves the productive rate of polyester.
In one embodiment, cleaning interface is also provided with at horizontal section place.Can have by cleaning interface the material that there is horizontal section place in one's care, clean air delivery pipe and bending part can also be come by this cleaning interface.
In one embodiment, the inwall of gas discharge pipe is provided with drag reduction layer.Drag reduction layer contributes to the backflow of material.In a specific embodiment, drag reduction layer is polytetrafluorethylecoatings coatings or epoxy coating.
In one embodiment, the diameter of vertical section and the ratio of polycondensation reactor diameter are between 0.05 ~ 0.3, preferably between 0.1 ~ 0.2.The ratio of the volume of vertical section and the volume of polycondensation reactor between 0.09 ~ 0.4, preferably between 0.13 ~ 0.34, more preferably between 0.17 ~ 0.26.The gas discharge pipe of this size can meet and uses this poly-reactor to carry out the maximum free air delivery of producing, and guarantees to produce and operation can be carried out smoothly.
In one embodiment, attemperator is provided with at horizontal section place the temperature of horizontal section to be remained on the boiling temperature of producing the alcohol that polyester uses.Like this, the ester only arriving the gaseous state of horizontal section can be condensed into liquid and reflux, and other low-boiling by-products and small-molecule substance all remain gaseous state and be pumped, thus not only can improve the productive rate of polyester, and can promote polycondensation continue carry out.
In one embodiment, the horizontal conveyor for cooling material and transmission material is also provided with in the downstream of extrusion device.Horizontal conveyor makes material can not be subject to the stretching action of external force during transmitting, and realizes naturally cooling and crystallization, and this contributes to the quality improving polyester product, is easier to realize automatic granulating and pelletizing.
In this application, term " upstream " and " downstream " are for reference with the flow direction of material.
Compared with prior art, the invention has the advantages that, by being provided with the vacuum static reactor of screen cloth in the downstream of polycondensation reactor, the material be fed in vacuum static reactor can be become shallow bid thread, thus accretion stream surface-area, accelerate micromolecular in material removing, and then the molecular chain of polyester can be increased further.Polycondensation reactor is provided with the gas discharge pipe with bending part upward, the material being pumped to the vertical section of bending part can be back to polycondensation reactor inside under gravity instead of accumulate in gas discharge pipe, thus not only increase the productive rate of polyester and solve the blocked problem of gas discharge pipe, make to produce and operate and can carry out smoothly.In addition, what arrange in the downstream of extrusion device makes material can not be subject to the stretching action of external force during transmitting for the horizontal conveyor cooling material and transmission material, and realizing naturally cooling and crystallization, this contributes to the quality improving polyester product, is easier to realize automatic granulating and pelletizing.
Accompanying drawing explanation
Also will be described in more detail the present invention with reference to accompanying drawing based on embodiment hereinafter.Wherein:
Fig. 1 is the schematic diagram according to polyester production device of the present invention;
Fig. 2 is the structural representation according to vacuum static reactor of the present invention;
Fig. 3 is the structural representation according to gas discharge pipe of the present invention.
In the drawings, identical component is indicated by identical Reference numeral.Accompanying drawing is not according to the scale of reality.
Embodiment
Below in conjunction with accompanying drawing, the present invention will be further described.
Fig. 1 show schematically show according to polyester production device 100 of the present invention.Polyester production device 100 comprises polycondensation reactor 101, and the downstream of polycondensation reactor 101 is provided with vacuum static reactor 102, and the downstream of vacuum static reactor 102 is provided with extrusion device 103.Vacuum static reactor 102 for significantly improving the volatilization of material small molecular material, thus makes the molecular chain of polyester can increase further, will further describe the structure of vacuum static reactor 102 hereinafter.Should be appreciated that, polyester production device 100 can also comprise the esterifier 120 being arranged on polycondensation reactor 101 upstream, and acid and alcohol can be used like this as Material synthesis polyester.Esterifier 120, polycondensation reactor 101 are all, known by those skilled in the art, for simplicity repeat no more here.
Fig. 2 show schematically show vacuum static reactor 102 of the present invention.The screen cloth 111 that vacuum static reactor 102 comprises housing 110 and arranges perpendicular to the axis of housing 110, the material of screen cloth 111 is preferably stainless steel.Screen cloth 111 is for becoming the material entered in vacuum static reactor 102 into shallow bid thread, thus accretion stream surface-area, accelerate micromolecular in material removing, and then the molecular chain of polyester can be increased further, therefore preferred entrance 115 place screen cloth 111 being arranged on vacuum static reactor 102.In addition, multiple screen cloth can also be set, multiple screen cloth is arranged with becoming general parallel orientation, the material generation multiple conversions entered in vacuum static reactor 102 can be made like this, increase material and air contact surfaces amass, accelerate micromolecular in material removing, and then the molecular chain of polyester can be increased further.On screen cloth 111, the shape of mesh can be the shape be applicable to arbitrarily, is preferably circular.When the viscosity of pending material is larger, the comparatively large and screen cloth of comparatively small amt of preferred hole equivalent diameter, when the viscosity of pending material is less, the less and a fairly large number of screen cloth of preferred hole equivalent diameter.
In addition, as shown in Figure 2, be provided with in the upstream portion of vacuum static reactor 102 and multiplely vacuumize interface 112.Like this, by vacuumizing the vacuum tightness in vacuum static reactor at 100-2000Pa.Vacuum condition is conducive to small molecules in material to external diffusion, and vacuum condition reduces the resistance of Flow of Goods and Materials, is conducive to material smooth outflow in vacuum static reactor.In addition, the inwall of the housing of vacuum static reactor 102 is provided with drag reduction layer and is attached on the inwall of vacuum reactor 102 to avoid material to hang, such as first this by carrying out shot blasting process to inwall, then on inwall, applies drag reduction layer and realize.In a preferred embodiment, it is 50-1000 μm that drag reduction layer can be thickness, is preferably tetrafluoroethylene (i.e. Teflon) layer or the epoxy resin layer of 200-800 μm.
In vacuum static reactor 102, polycondensation is proceeded in order to make material, the temperature in vacuum static reactor 102 also will be kept equal with the temperature in polycondensation reactor 101, can polycondensation and reach the object of molecular chain increasing polyester further in such material vacuum batch reactor 102.
Turn back to Fig. 1, the vertical setting of vacuum static reactor 102 one-tenth, its entrance 115 is in top and is connected with the discharge port of polycondensation reactor 101, and its outlet 116 is in below and is connected with the extrusion device 103 in downstream.Like this when the mobility of material is better, can automatically flow into vacuum static reactor 102 from polycondensation reactor 101 and flow through vacuum static reactor 102, this simplify production equipment, reduce cost.When the mobility of material is poor, Melt Pump 104 can also be set between polycondensation reactor 101 and vacuum static reactor 102, to drive the flowing of material.Preferably, also arrange another screen cloth (not shown) in the outlet of Melt Pump 104, structure, the material of this screen cloth are preferably identical with the screen cloth 111 in vacuum static reactor 102.
Fig. 3 show schematically show gas discharge pipe 105 of the present invention.Gas discharge pipe 105 is arranged on polycondensation reactor 101, discharges for the low-boiling point material such as small-molecule substance, byproduct of reaction polycondensation produced.In the embodiment shown in fig. 3, gas discharge pipe 105 is provided with bending part 106.Bending part 106 becomes " several " font substantially, the bottom of the vertical section 107 of bending part 106 is connected with polycondensation reactor 101 and upper end is connected with horizontal section 108, the other end of horizontal section 108 is then connected with vaccum-pumping equipment (not shown) by the discharge section 109 of bending part 106, to realize discharge function.Should be appreciated that, bending part 106 also can have other shapes, such as " M " shape etc.Gas discharge pipe 105 even can not also have discharges section 109.For the ease of maintenance, bending part 106 can be independent component, and is assemblied in gas discharge pipe 105 by flange.In addition, cleaning interface 117 can also be arranged clean the inside of gas discharge pipe 105 and bending part 106 with the material collected in bending part 106 on bending part 106.
In confined state, bending part 106 should upward (that is, dorsad ground), and the position that the position of horizontal section 108 is connected with polycondensation reactor 101 higher than vertical section 107.Like this, carried secretly the material of the liquid state be extracted in gas discharge pipe 105 and low-molecular-weight Ester (it can form the finished product) can be back to polycondensation reactor 101 along vertical section 107 instead of accumulate in gas discharge pipe 105, thus not only increase the productive rate of polyester and solve the blocked problem of gas discharge pipe, make to produce and operate and can carry out smoothly.In order to accelerate the cohesion of material and low-molecular-weight Ester, the temperature of vertical section 107 can be set to lower than the temperature in polycondensation reactor 101.
In addition, normally can work in order to ensure gas discharge pipe 105, the ratio of the diameter of vertical section 107 and the diameter of polycondensation reactor 101 is arranged between 0.05 ~ 0.3, preferably between 0.1 ~ 0.2.The ratio of the volume of vertical section 107 and the volume of polycondensation reactor 101 between 0.09 ~ 0.4, preferably between 0.13 ~ 0.34, more preferably between 0.17 ~ 0.26.Even if like this when the material level in polycondensation reactor 101 reaches maximum, gas discharge pipe 105 also can realize function described here completely.
Also on the inwall of gas discharge pipe 105, be provided with drag reduction layer.Such as, drag reduction layer is polytetrafluorethylecoatings coatings or epoxy coating, and its thickness may be selected to be 50-1000 μm, is preferably 200-800 μm.Drag reduction layer can make the material condensed upon on the inwall of gas discharge pipe 105 be back to polycondensation reactor 101 swimmingly.
Attemperator 114 can also be provided with the temperature of horizontal section 108 to be remained on the boiling temperature of producing the alcohol that polyester uses at horizontal section 108 place.Attemperator 114 realizes by heat exchange jacket or electrical tracing.Like this, only arrive the gaseous state ester of horizontal section 108 and can be condensed into liquid and reflux, and other low-boiling by-products and small-molecule substance all remain gaseous state and be pumped, thus not only can improve the productive rate of polyester, and can promote polycondensation continue carry out.
Turn back to Fig. 1, the extrusion device 103 being arranged on vacuum static reactor 102 downstream may be selected to be the forcing machine with multistage devolatilization mouth.The horizontal conveyor 140 for cooling material and transmission material is also provided with, such as steel-belt conveyor in the downstream of extrusion device 103.Horizontal conveyor 140 makes material can not be subject to the stretching action of external force during transmitting, and realizes naturally cooling and crystallization, and this contributes to the quality improving polyester product, is easier to the automatic granulating and the pelletizing that realize material.In order to accelerate crystallisation by cooling, cooling sprayer (not shown) or blower fan drying installation (not shown) etc. can also be set at horizontal conveyor 140 place.
When using according to polyester production device 100 of the present invention, if first had to esterifier 120() in add acid and the alcohol of predetermined amount, esterification under suitable condition.Then, material is forwarded in polycondensation reactor 102, under certain power of agitator, carry out stirring and polycondensation.After polycondensation reaches predetermined extent, material is entered in vacuum static reactor 102, the temperature of vacuum static reactor 102 is remained equal to the temperature in polycondensation reactor 102 further polycondensation.Finally, material is discharged in extrusion device 103 from vacuum static reactor 102, with after deliver to dicing machine 150 place's granulation through horizontal conveyor 140.
Although invention has been described with reference to preferred embodiment, without departing from the scope of the invention, various improvement can be carried out to it and material wherein can be replaced with equivalent.The present invention is not limited to specific embodiment disclosed in literary composition, but comprises all technical schemes fallen in the scope of claim.
Claims (11)
1. a polyester production device, comprising:
Polycondensation reactor,
Be arranged on described polycondensation reactor downstream and the vacuum static reactor be communicated with described polycondensation reactor,
Be arranged on the extrusion device of described vacuum static reactor downstream,
Wherein, the temperature in described vacuum static reactor is identical with the temperature in described polycondensation reactor, and the screen cloth that described vacuum static reactor comprises housing and is provided at its inner portion perpendicular to the axis of described housing.
2. polyester production device according to claim 1, is characterized in that, described vacuum static reactor is vertically arrange, and its top entry is connected with the relief outlet of described polycondensation reactor, and outlet at bottom is connected with described extrusion device.
3. polyester production device according to claim 1 and 2, is characterized in that, is provided with multiple interface that vacuumizes to remain vacuum by described vacuum static reactor in the upstream portion of described vacuum static reactor.
4. the polyester production device according to any one of Claim 1-3, it is characterized in that, described polycondensation reactor is provided with the gas discharge pipe with bending part upward, described bending part comprises vertical section and horizontal section, the bottom of wherein said vertical section is connected with described polycondensation reactor, upper end is connected with described horizontal section, the position that the position of described horizontal section is connected with described polycondensation reactor higher than described vertical section.
5. polyester production device according to claim 4, is characterized in that, the diameter of described vertical section and the ratio of described polycondensation reactor diameter are between 0.05 ~ 0.3, preferably between 0.1 ~ 0.2.
6. polyester production device according to claim 5, is characterized in that, the ratio of the volume of described vertical section and the volume of described polycondensation reactor between 0.09 ~ 0.4, preferably between 0.13 ~ 0.34, more preferably between 0.17 ~ 0.26.
7. the polyester production device according to any one of claim 4 to 6, is characterized in that, the temperature of described vertical section is lower than the temperature in described polycondensation reactor.
8. the polyester production device according to any one of claim 4 to 7, is characterized in that, is provided with attemperator the temperature of described horizontal section to be remained on the boiling temperature of producing the alcohol that polyester uses at described horizontal section place.
9. the polyester production device according to any one of claim 4 to 8, is characterized in that, is also provided with cleaning interface at described horizontal section place.
10. the polyester production device according to any one of claim 4 to 9, is characterized in that, the inwall of described gas discharge pipe is provided with drag reduction layer.
11. polyester production devices according to any one of claim 1 to 10, is characterized in that, are also provided with for cooling material and transmitting the horizontal conveyor of material in the downstream of described extrusion device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310476497.XA CN104558573A (en) | 2013-10-12 | 2013-10-12 | Polyester production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310476497.XA CN104558573A (en) | 2013-10-12 | 2013-10-12 | Polyester production device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104558573A true CN104558573A (en) | 2015-04-29 |
Family
ID=53075708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310476497.XA Pending CN104558573A (en) | 2013-10-12 | 2013-10-12 | Polyester production device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104558573A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101220140A (en) * | 2007-12-24 | 2008-07-16 | 中昊晨光化工研究院 | Reaction device for interesterification and polycondensation reaction |
| CN101837276A (en) * | 2010-03-24 | 2010-09-22 | 华东理工大学 | Novel flow-field structurized falling film polycondensation reactor and application thereof |
| CN101875720A (en) * | 2010-07-02 | 2010-11-03 | 天津大学 | Method and equipment for preparing high molecular weight polycondensate |
| CN101910245A (en) * | 2007-12-27 | 2010-12-08 | 三菱化学株式会社 | Method for producing aliphatic polyester |
| CN202297440U (en) * | 2011-09-08 | 2012-07-04 | 中国石油天然气集团公司 | Continuous production system of polytrimethylene terephthalate |
-
2013
- 2013-10-12 CN CN201310476497.XA patent/CN104558573A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101220140A (en) * | 2007-12-24 | 2008-07-16 | 中昊晨光化工研究院 | Reaction device for interesterification and polycondensation reaction |
| CN101910245A (en) * | 2007-12-27 | 2010-12-08 | 三菱化学株式会社 | Method for producing aliphatic polyester |
| CN101837276A (en) * | 2010-03-24 | 2010-09-22 | 华东理工大学 | Novel flow-field structurized falling film polycondensation reactor and application thereof |
| CN101875720A (en) * | 2010-07-02 | 2010-11-03 | 天津大学 | Method and equipment for preparing high molecular weight polycondensate |
| CN202297440U (en) * | 2011-09-08 | 2012-07-04 | 中国石油天然气集团公司 | Continuous production system of polytrimethylene terephthalate |
Non-Patent Citations (3)
| Title |
|---|
| 刘兆彦: "CTMC新三釜聚酯装置", 《聚酯工业》 * |
| 殷勤俭: "《现代高分子科学实验》", 31 December 2012, 化学工业出版社 * |
| 高桂枝: "《新编大学化学实验 下》", 31 December 2011, 中国环境科学出版社 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TW520381B (en) | Continuous process for producing poly(trimethylene terephthalate) | |
| JP4119249B2 (en) | Introducing components by recycling to the manufacturing process | |
| US9649616B2 (en) | Continuous solid-state polymerisation device and method | |
| US3644294A (en) | Process and equipment for the continuous production of polyesters | |
| US8470250B2 (en) | Polyester production system employing horizontally elongated esterification vessel | |
| US8198392B2 (en) | Polymer producing method and apparatus and polymer degassing method and apparatus | |
| CN1988951A (en) | Method and device for the gradual production of polymers using melt condensation | |
| US8399602B2 (en) | Polymerisation reactor, polymerisation device, method for producing bio-degradeable polyester and uses | |
| JP4670901B2 (en) | Polylactic acid production apparatus and method | |
| JP2009132857A (en) | Method and device for producing polymer | |
| CN104403091B (en) | Polyester production equipment and technology | |
| CN1288188C (en) | Method for increasing solid state polymerization rate of polyester polymers | |
| CN102451660B (en) | Downflow type pre-polymerization tower | |
| CN111423570A (en) | Process method and device for continuously producing degradable polyester | |
| KR101635679B1 (en) | Falling film evaporation reactor for suppressing polymer gel formation | |
| CN1320024C (en) | Method and equipment for continuous producing polyester | |
| CN104558573A (en) | Polyester production device | |
| CN106715522A (en) | A continuous method for manufacturing a polyester from cyclic ester monomer | |
| CN206502768U (en) | A kind of continuous alcoholysis recovery system of pet waste | |
| CN105873980B (en) | Polycondensation reaction polymer and its manufacture device | |
| JP2006507377A5 (en) | ||
| CN113717355B (en) | Method and device for continuously preparing polyglycolide and lactide segmented copolymer | |
| CN206502769U (en) | A kind of device for continuously recycling of Waste Polyester material | |
| KR20160004074A (en) | Stirred tank reactor and meth1od for preparing pvc resin using th1e same | |
| CN103429332A (en) | Process and device for preparation of ester in granule form |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |