CN109621832B - Pilot-scale blending method of titanium dioxide suspension - Google Patents
Pilot-scale blending method of titanium dioxide suspension Download PDFInfo
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- CN109621832B CN109621832B CN201910019028.2A CN201910019028A CN109621832B CN 109621832 B CN109621832 B CN 109621832B CN 201910019028 A CN201910019028 A CN 201910019028A CN 109621832 B CN109621832 B CN 109621832B
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 title claims abstract description 156
- 239000000725 suspension Substances 0.000 title claims abstract description 99
- 239000004408 titanium dioxide Substances 0.000 title claims abstract description 78
- 238000002156 mixing Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000011020 pilot scale process Methods 0.000 title claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 51
- 238000004519 manufacturing process Methods 0.000 claims abstract description 36
- 239000007788 liquid Substances 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 238000010790 dilution Methods 0.000 claims abstract description 18
- 239000012895 dilution Substances 0.000 claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 239000002245 particle Substances 0.000 claims description 39
- 238000004062 sedimentation Methods 0.000 claims description 34
- 238000000265 homogenisation Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 239000002244 precipitate Substances 0.000 claims description 15
- 238000003756 stirring Methods 0.000 claims description 15
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 11
- 239000000843 powder Substances 0.000 claims description 8
- 238000005086 pumping Methods 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 7
- 239000002699 waste material Substances 0.000 claims description 7
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims description 6
- 235000019982 sodium hexametaphosphate Nutrition 0.000 claims description 6
- 239000001577 tetrasodium phosphonato phosphate Substances 0.000 claims description 6
- 238000009826 distribution Methods 0.000 claims description 5
- 239000013049 sediment Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 3
- 238000009472 formulation Methods 0.000 claims 4
- 238000001514 detection method Methods 0.000 abstract description 19
- 230000000694 effects Effects 0.000 abstract description 3
- 239000004677 Nylon Substances 0.000 abstract description 2
- 229920001778 nylon Polymers 0.000 abstract description 2
- 238000007689 inspection Methods 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 229920006052 Chinlon® Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000001804 emulsifying effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 239000012085 test solution Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/70—Pre-treatment of the materials to be mixed
- B01F23/713—Sieving materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/80—After-treatment of the mixture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/80—After-treatment of the mixture
- B01F23/808—Filtering the mixture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/80—Forming a predetermined ratio of the substances to be mixed
- B01F35/88—Forming a predetermined ratio of the substances to be mixed by feeding the materials batchwise
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F2101/00—Mixing characterised by the nature of the mixed materials or by the application field
- B01F2101/23—Mixing of laboratory samples e.g. in preparation of analysing or testing properties of materials
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The invention discloses a titanium dioxide suspension pilot-scale test blending system and a method in the technical field of nylon production, which comprises a vibrating screen, a pre-blending tank, a homogenizer, a settling tank, a dilution tank and a storage tank which are connected in sequence, wherein the outlet of the storage tank is communicated with the inlet of a filter, and the outlet of the filter is communicated with a production pipeline, the titanium dioxide raw material is directly debugged, and is dispersed, emulsified, crushed and conveyed by the homogenizer integrally, the homogenizer is only suitable for debugging in a small amount, can not be used in normal production, but can not meet the detection requirement of a normally produced centrifuge, the system can not lose the condition of the raw material and far exceed the detection amount of manual detection, so the detection effect has universality and precision, can be used for batch connection blending of detection liquid, and can directly input the detection liquid into the production pipeline for use, avoiding detection loss.
Description
Technical Field
The invention relates to the technical field of nylon production, in particular to a pilot-scale blending method of titanium dioxide suspension.
Background
Polymerization reaction is needed in the production process of chinlon, a delustering agent is needed to treat during the production of polymers, the delustering agent needs titanium dioxide, the good delustering agent has high requirement on the particle size distribution of the titanium dioxide, the particle size of the titanium dioxide often cannot meet the requirement on delustering effect, the prior art is to perform manual allocation before production, the manual allocation has too small inspection amount and no universality of inspection results, the whole inspection process needs to be repeated for many times by inspection personnel, the energy is wasted, if the inspection amount of titanium dioxide raw materials is enlarged, a large amount of inspection liquid cannot enter a production line, the waste is caused, a large amount of energy is consumed, temporary halt is needed in each manual sampling inspection, and only the titanium dioxide of the batch can be put into production after the inspection is completed, it is inconvenient and there is a need for a small scale test of titanium dioxide, which is tested prior to use, determines whether it can be used as a raw material, and can be continuously checked.
Based on the above, the invention designs a pilot-scale blending method of titanium dioxide suspension to solve the above problems.
Disclosure of Invention
The invention aims to provide a pilot-scale blending method of titanium dioxide suspension, which has the advantages of simple process, strong operability, detection loss reduction, small-batch continuous blending, no waste of debugging detection liquid and direct application to production.
The invention is realized by the following steps: a pilot-scale blending method of titanium dioxide suspension comprises the following steps:
and 8, opening a blending valve, discharging the diluted suspension into a storage tank for later use, pumping the filtered diluted suspension into a filter through a circulating pump during production, and then feeding into a normal production pipeline for production.
Further, the homogenizing operation in step 3 is: closing the homogenizing three-way valve, communicating the water outlet of the homogenizer with the pre-blending tank, returning the homogenized suspension extruded by the homogenizer to the pre-blending tank, stirring again, and homogenizing by the homogenizer at the homogenizing pressure: 1.48pa-2.08pa, the homogenization temperature is: the homogenization times are as follows at 10-15 deg.C: 5-7 times.
Further, the filtering in step 8 is completed as: adjusting the direction of the storage three-way valve to ensure that an outlet of the storage tank is sequentially communicated with a circulating pump, a filter, the storage three-way valve and a storage circulating pipe, wherein the circulating pump pumps the diluted suspension in the storage tank into the filter for filtering, and the filter intercepts titanium dioxide particles with the particle size of more than 1 mu m and returns the diluted suspension to the storage tank through the storage three-way valve and the storage circulating pipe; the diluted suspension in the storage tank was repeatedly filtered for more than one hour.
Further, in the step 2, the weight part ratio of the water, the liquid caprolactam, the sodium hexametaphosphate aqueous solution and the screened titanium dioxide powder mixed in the suspension is adjusted to 24.78 parts: 46.02 parts of: 0.2 part of: 29 parts of the raw materials, wherein the stirring time N is 6-8 hours; the settling time M in step 4 was 24 hours and the stirring time T in step 6 was 0.5 hour.
Further, the homogeneous operating conditions in step 3 are as follows: the homogenization pressure is: 1.48-2.08 pa; the homogenization temperature is as follows: the homogenization times are as follows at 10-15 deg.C: 5-7 times; the qualified standard of the titanium dioxide particle size in the step 6 is as follows: if the proportion of the titanium dioxide particles with the particle size of less than 0.75 mu m is less than 50 percent, the test result of the titanium dioxide raw material of the batch is unqualified; if the proportion of the titanium dioxide particles with the particle size of less than 0.75 mu m is more than or equal to 50 percent, the test result of the titanium dioxide raw material of the batch is qualified; the concentration of titanium dioxide in the diluted suspension in step 7 is as follows: 12 to 12.5 percent.
The invention has the beneficial effects that: according to the invention, titanium dioxide raw materials are directly debugged, and dispersing, emulsifying, crushing and conveying are carried out integrally through the homogenizer, the homogenizer is only suitable for a small amount of debugging, and can not be used in normal production, and the centrifuge in normal production can not meet the detection requirement.
Drawings
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of the system of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
1-oscillating screen, 2-pre-blending tank, 21-pre-blending tank feed inlet, 22-pre-blending valve, 3-homogenizer, 31-homogenizing three-way valve, 4-settling tank, 41-settling slag valve, 42-settling liquid valve, 5-diluting tank, 51-blending valve, 6-storage tank, 61-circulating pump, 62-storage three-way valve, 63-storage circulating pipe, 7-filter, 8-production pipeline, 9-collecting tank.
Detailed Description
Referring to fig. 1, the present invention provides a technical solution:
a pilot-scale blending method of titanium dioxide suspension is completed by a pilot-scale blending system of titanium dioxide suspension,
the system is as follows: the utility model provides a pilot scale allotment system of titanium dioxide suspension, includes shale shaker 1, pre-blending jar 2, isotropic symmetry 3, subsider 4, dilution tank 5 and the holding vessel 6 that connect gradually, the export of holding vessel 6 and the entry intercommunication of filter 7, the export and the production pipeline 8 intercommunication of filter 7 connect gradually, and system process is simple and clear, and the detection liquid that the test detected can also get into the production pipeline after detecting the completion, continues production, and it is extravagant not, and the testing result through the isotropic symmetry can be more even than the allotment centrifuge in the production technology in addition, improves and detects the precision.
The output port of the homogenizer 3 is respectively communicated with the pre-preparation tank 2 and the sedimentation tank 4 through a homogenizing three-way valve 31, so that the homogenizing three-way valve 31 can change the flow direction of liquid in the pipeline, multiple times of homogenizing operation is facilitated, the process requirements are met, the water outlet of the filter 7 is respectively communicated with the production pipeline 8 and the storage tank 6 through a storage three-way valve 62, the flow direction of the liquid in the pipeline is changed through the storage three-way valve 62, filtering and storage are convenient, and titanium dioxide is prevented from settling and blocking the pipeline;
the device comprises a vibrating screen 1, a pre-blending tank 2, a homogenizer 3, a settling tank 4, a dilution tank 5 and a storage tank 6 which are sequentially connected through a valve, wherein an outlet of the storage tank 6 is connected with a filter 7 through a circulating pump 61, an outlet of the filter 7 is connected with a production pipeline 8, and an output port of the homogenizer 3 is respectively communicated with the pre-blending tank 2 and the settling tank 4 through a homogenizing three-way valve 31.
The pre-dispense tank 2, dilution tank 5 and holding tank 6 are all dispense tanks.
The bottom of the settling tank 4 is connected with a collecting tank 9 through a sediment valve 41.
The filter 7 is communicated with the production line 8 through a storage three-way valve 62 by a storage circulation line 63, and the storage tank 6 is communicated with the storage three-way valve 62 by a storage circulation line 63.
The method comprises the following steps:
wherein the homogenizing operation in step 3 is: closing the homogenizing three-way valve 31, communicating the water outlet of the homogenizer 3 with the pre-blending tank 2, returning the homogeneous suspension extruded by the homogenizer 3 to the pre-blending tank 2, stirring again, and then homogenizing through the homogenizer 3, wherein the homogenizing pressure is as follows: 1.48pa-2.08pa, the homogenization temperature is: the homogenization times are as follows at 10-15 deg.C: 5-7 times; next, the homogenizing three-way valve 31 is opened, the homogenizer 3 is communicated with the settling tank 4, the homogenizing operation is performed for a plurality of times, the mixing is more uniform, and the filtering in the step 7 is completed as follows: when the diluted suspension is not produced, closing the storage three-way valve 62, pumping the diluted suspension into the filter 7 through the circulating pump 61 for filtration, intercepting titanium dioxide particles with the particle size of more than 1 mu m by the filter, and returning the titanium dioxide particles to the storage tank 6 through the storage circulating pipe 63; and repeatedly filtering the diluted suspension in the storage tank 6 for more than one hour, and filtering out the titanium dioxide particles which do not meet the requirement, so as to avoid the reduction of the product quality due to the detection liquid.
One specific application of the embodiment is as follows: the invention needs the following steps when in use:
the homogenizing three-way valve 31 and the storage three-way valve 62 in the system are three-way valves, so that the flow direction of liquid in a pipeline can be conveniently changed;
the system and the method can increase the detection amount and the batch, can continuously allocate and continuously monitor, and really achieve the real-time monitoring of the quality of raw materials, thereby achieving the purpose of controlling the product quality of production, reducing the existence probability of defective products from the source, and the pilot-scale allocation liquid after debugging and monitoring can be continuously used without waste, the process is simple, the occupied area is small, the cost is low, the effect is good, the flow direction of liquid in a pipeline is changed by the storage three-way valve 62, the filtration and the storage are convenient, because the titanium dioxide stops flowing and the pipeline is settled and blocked, the titanium dioxide diluted suspension in the storage tank 6 needs to continuously flow, the titanium dioxide is kept in a suspension state, and when the production is needed, the flow direction of the diluted suspension is changed by the storage three-way valve 62 at any time.
Although specific embodiments of the invention have been described above, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the appended claims.
Claims (5)
1. A pilot-scale blending method of titanium dioxide suspension is characterized in that: the method comprises the following steps:
step 1, selecting titanium dioxide raw material powder with qualified particle size to be detected through a vibrating screen (1) for later use;
step 2, closing a pre-adjusting valve (22), sending water, liquid caprolactam, a sodium hexametaphosphate aqueous solution and screened titanium dioxide powder into a pre-adjusting tank (2) through a feed inlet (21) of the pre-adjusting tank according to a certain proportion, and stirring the mixture in the pre-adjusting tank (2) for N time to prepare a pre-adjusting suspension for use;
step 3, opening a pre-adjusting valve (22), adjusting the direction of a homogenizing three-way valve (31), communicating an outlet of a homogenizer (3) with a pre-adjusting tank (2), homogenizing the pre-adjusting suspension stirred in the step 2 by the homogenizer (3) according to homogenizing operation conditions, and homogenizing the pre-adjusting suspension into a homogeneous suspension;
step 4, adjusting the direction of the homogenizing three-way valve (31), closing the sediment valve (41) and the sediment valve (42) at the same time, communicating the outlet of the homogenizer (3) with the settling tank (4), and pressing the homogenized suspension after homogenization into the settling tank (4) by the homogenizer (3);
step 5, the sedimentation tank (4) carries out sedimentation treatment on the homogeneous suspension, after sedimentation time M, the homogeneous suspension forms sedimentation suspension and precipitate, then a sedimentation liquid valve (42) is opened, a blending valve (51) is closed, the sedimentation tank (4) is communicated with a dilution tank (5), after the sedimentation suspension is completely discharged into the dilution tank (5), a sedimentation residue valve (41) is opened, the precipitate is flushed into a collecting tank (9) by water, and then the precipitate is dewatered and recovered;
step 6, stirring the sedimentation suspension in the dilution tank (5) for T hours, sampling to test whether the particle size distribution of the titanium dioxide is qualified, and if not, recovering the titanium dioxide raw material of the batch as waste material, wherein the titanium dioxide raw material of the batch cannot be used; if qualified, entering step 7;
step 7, adding desalted water into the settled suspension for dilution, and blending the settled suspension into diluted suspension according with the use concentration of titanium dioxide;
and 8, opening a blending valve (51), discharging the diluted suspension into a storage tank (6) for standby, pumping the filtered diluted suspension into a filter (7) through a circulating pump (61) during production, and then feeding the diluted suspension into a normal production pipeline (8) for production.
2. The pilot-scale formulation method of titanium dioxide suspension according to claim 1, wherein: the homogenizing operation in step 3 is: closing the homogenizing three-way valve (31), communicating the water outlet of the homogenizer (3) with the pre-blending tank (2), returning the homogenized suspension extruded by the homogenizer (3) to the pre-blending tank (2), stirring again, and homogenizing through the homogenizer (3) at the homogenizing pressure: 1.48pa-2.08pa, the homogenization temperature is: the homogenization times are as follows at 10-15 deg.C: 5-7 times.
3. The pilot-scale formulation method of titanium dioxide suspension according to claim 1, wherein: the filtration in step 8 is completed as: adjusting the direction of a storage three-way valve (62), enabling an outlet of a storage tank (6) to be sequentially communicated with a circulating pump (61), a filter (7), the storage three-way valve (62) and a storage circulating pipe (63), pumping diluted suspension in the storage tank (6) into the filter (7) by the circulating pump (61) for filtering, intercepting titanium dioxide particles with the particle size larger than 1 mu m by the filter (7), and returning the diluted suspension to the storage tank (6) through the storage three-way valve (62) and the storage circulating pipe (63); the diluted suspension in the storage tank (6) is repeatedly filtered for more than one hour.
4. The pilot-scale formulation method of titanium dioxide suspension according to claim 1, wherein: the mass part ratio of the water, the liquid caprolactam, the sodium hexametaphosphate aqueous solution and the screened titanium dioxide powder mixed in the pre-adjusted suspension in the step 2 is 24.78 parts: 46.02 parts of: 0.2 part of: 29 parts of the raw materials, wherein the stirring time N is 6-8 hours; the settling time M in step 4 was 24 hours and the stirring time T in step 6 was 0.5 hour.
5. The pilot-scale formulation method of titanium dioxide suspension according to claim 1, wherein: the operating conditions for homogenization in step 3 were as follows: the homogenization pressure is: 1.48-2.08 pa; the homogenization temperature is as follows: the homogenization times are as follows at 10-15 deg.C: 5-7 times; the qualified standard of the titanium dioxide particle size in the step 6 is as follows: if the proportion of the titanium dioxide particles with the particle size of less than 0.75 mu m is less than 50 percent, the test result of the titanium dioxide raw material of the batch is unqualified; if the proportion of the titanium dioxide particles with the particle size of less than 0.75 mu m is more than or equal to 50 percent, the test result of the titanium dioxide raw material of the batch is qualified; the concentration of titanium dioxide in the diluted suspension in step 7 is as follows: 12 to 12.5 percent.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910019028.2A CN109621832B (en) | 2019-01-09 | 2019-01-09 | Pilot-scale blending method of titanium dioxide suspension |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910019028.2A CN109621832B (en) | 2019-01-09 | 2019-01-09 | Pilot-scale blending method of titanium dioxide suspension |
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| CN109621832A CN109621832A (en) | 2019-04-16 |
| CN109621832B true CN109621832B (en) | 2021-07-02 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19914089A1 (en) * | 1999-03-27 | 2000-09-28 | Guntram Krettek | Wet classifier in the form of a centrifuge has a grinding chamber for the coarse fraction of the sediment in the re-dispersed suspension |
| CN2885425Y (en) * | 2006-04-13 | 2007-04-04 | 上海联吉合纤有限公司 | Centrifuger for titanium dioxide preparation in polyester production |
| DE102006054727B3 (en) * | 2006-11-21 | 2008-06-05 | Kronos International, Inc. | Process for the improved agitation grinding of solid particles |
| CN101306837A (en) * | 2007-05-15 | 2008-11-19 | 上海平明精化工贸有限公司 | Mother material for preparing titanium dioxide water-soluble serous for delustring chemical fibre and preparation method |
| CN102352538B (en) * | 2011-07-22 | 2013-06-05 | 浙江华建尼龙有限公司 | Process and equipment for preparing chinlon delustering agent |
| CN104313722B (en) * | 2014-11-05 | 2016-03-30 | 湖南金帛化纤有限公司 | A kind of centrifugal method preparing tio_2 suspension |
| CN106015938B (en) * | 2016-07-20 | 2018-08-24 | 江苏海阳锦纶新材料有限公司 | A kind of tio_2 suspension configuration device and configuration method |
| CN107790054A (en) * | 2017-11-30 | 2018-03-13 | 太仓北新建材有限公司 | A kind of automatic recipe maker |
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Effective date of registration: 20220329 Address after: 350200 Binhai Industrial Zone, Changle City, Fuzhou City, Fujian Province Patentee after: CHANGLE LIHENG POLYAMIDE TECHNOLOGY Co.,Ltd. Patentee after: CHANGLE HENGSHEN SYNTHETIC FIBER Co.,Ltd. Address before: 350218 Binhai Industrial Zone, Changle City, Fuzhou City, Fujian Province Patentee before: CHANGLE LIHENG POLYAMIDE TECHNOLOGY Co.,Ltd. |
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Address after: 301 Houcuo, Zhangliu Village, Jiangtian Town, Changle District, Fuzhou City, Fujian Province, 350206 Patentee after: Fujian Liheng Nylon Industry Co.,Ltd. Country or region after: China Patentee after: Fujian Hengshen Synthetic Fiber Technology Co.,Ltd. Address before: 350200 Binhai Industrial Zone, Changle City, Fuzhou City, Fujian Province Patentee before: CHANGLE LIHENG POLYAMIDE TECHNOLOGY Co.,Ltd. Country or region before: China Patentee before: CHANGLE HENGSHEN SYNTHETIC FIBER Co.,Ltd. |
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