CN203741642U - Small liquid ratio cooking and pulping system for large liquid ratio permeation of cotton linter - Google Patents
Small liquid ratio cooking and pulping system for large liquid ratio permeation of cotton linter Download PDFInfo
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- CN203741642U CN203741642U CN201420103511.1U CN201420103511U CN203741642U CN 203741642 U CN203741642 U CN 203741642U CN 201420103511 U CN201420103511 U CN 201420103511U CN 203741642 U CN203741642 U CN 203741642U
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- Prior art keywords
- pipeline
- alkali
- machine
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- cotton
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- Expired - Lifetime
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 44
- 238000010411 cooking Methods 0.000 title claims abstract description 15
- 238000004537 pulping Methods 0.000 title claims abstract description 13
- 239000007788 liquid Substances 0.000 title abstract description 6
- 239000003513 alkali Substances 0.000 claims abstract description 77
- 238000007599 discharging Methods 0.000 claims description 24
- 238000002791 soaking Methods 0.000 claims description 10
- 238000004061 bleaching Methods 0.000 claims description 9
- 239000000835 fiber Substances 0.000 claims description 9
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 7
- 229910001882 dioxygen Inorganic materials 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract description 14
- 239000012535 impurity Substances 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract 1
- 238000009835 boiling Methods 0.000 description 12
- 230000000740 bleeding effect Effects 0.000 description 9
- 238000009413 insulation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000012634 fragment Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012466 permeate Substances 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000009826 distribution Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000009736 wetting Methods 0.000 description 3
- PCFMUWBCZZUMRX-UHFFFAOYSA-N 9,10-Dihydroxyanthracene Chemical compound C1=CC=C2C(O)=C(C=CC=C3)C3=C(O)C2=C1 PCFMUWBCZZUMRX-UHFFFAOYSA-N 0.000 description 2
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 235000012343 cottonseed oil Nutrition 0.000 description 2
- 238000005238 degreasing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003204 osmotic effect Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007127 saponification reaction Methods 0.000 description 2
- 238000010025 steaming Methods 0.000 description 2
- 239000012808 vapor phase Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000209202 Bromus secalinus Species 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 235000021050 feed intake Nutrition 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229910052943 magnesium sulfate Inorganic materials 0.000 description 1
- 235000019341 magnesium sulphate Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Abstract
The utility model discloses a small liquid ratio cooking and pulping system for large liquid ratio permeation of cotton linter, which comprises a cotton opener, an induced draft fan, an impurity remover, an air blower, a cyclone separator, a presoaking tank, a screw press, a screw conveyer, a steamed ball, a hydrogen peroxide tank, an alkali return tank, a circular screen filter and an alkali preparation pool and further comprises a sewage settling tank, a washing tank, a pulp refiner, a No.1 pulp storage tank, an EX desander, a No.2 pulp storage tank, a bleacher, a No.3 pulp storage tank and a pulp machine.
Description
Technical field
The utility model relates to the large liquor ratio of a kind of cotton linter and permeates little liquor ratio pulping by cooking system.
Background technology
In Cotton Pulp production process, the foreign material such as cottonseed fragment in cotton linter, cotton boll fragment, grass blade, wood chip, silt particle enter rotary spherical digester and process.Because impurity in cotton linter is many, traditional boiling generally adopts high temperature (172 DEG C), high pressure (0.75Mpa), high-alkali (40-55g/L) to carry out pulping by cooking, and in production, alkaline consumption is high, and energy consumption is high, pollutes heavy.The improvement of black liquor, cheats factory and brings heavy burden, can not up to standardly be forced to stop production, change the line of production because of black liquor treatment in many paper mills, purified cotton factory, chemical fibre factory.Tradition pulping by cooking technology profile as shown in Figure 1.
Now taking 40 cubic metres of rotary spherical digesters as example, brief introduction tradition chemical fiber cotton pulp digesting technoloy: oven-dry weight feeds intake: 4500Kg, alkali using rate: 16.2%, alkali charge: 729Kg liquor ratio: 1:3.6, alkali is dense: 45g/L, alkali lye goal amount: 16.2T, alkali lye enters bulb temperature: >=90 DEG C, and degree of polymerization scope: 550～6500, intensification 100min, be raised to 140 DEG C of steam bleeding 10min, be raised to 160 DEG C of steam bleeding 10min, heat up for the third time, be raised to 172 DEG C of insulation 180min, heating and heat preservation always consumes quantity of steam 6～7T, insulation finishes to carry out large steam bleeding, and steam bleeding 45-60min, opens rotary spherical digester lid, batch turning, boiling finishes.Traditional handicraft alkali consumption 729Kg/ ball, black liquor amount: 22.2～23.2T/ ball sewage.
Summary of the invention
The purpose of this utility model is to have proposed the large liquor ratio of a kind of cotton linter and permeates little liquor ratio pulping by cooking system.
In order to realize above object, the technical scheme that the utility model adopts is: the large liquor ratio of cotton linter is permeated little liquor ratio pulping by cooking system, comprises opener, air-introduced machine, de-burring machine, pressure fan, cyclone separator, pre-soaking pit, pressafiner, conveying worm, rotary spherical digester, dioxygen tank, returns alkali pond, cylinder filter and join alkali pond;
Opener is sent to de-burring machine by air-introduced machine by cotton, and de-burring machine is sent to cyclone separator by pressure fan by cotton;
Cyclone separator is provided with for the hole of air-discharging with for adding the hole of alkali lye;
The cotton of the discharging opening output of cyclone separator is input to pressafiner after infiltrating through pre-soaking pit;
Alkali lye after pressafiner squeezing is transported to go back to alkali pond, the alkali lye that goes back to alkali pond is transported to cylinder filter, cylinder filter is removed alkali lye after fiber fines and silt particle filter and is transported to and joins alkali pond, joins alkali pond and is connected with the hole that adds alkali lye of described cyclone separator by pipeline;
The discharging opening of pressafiner connects the inlet of conveying worm, and the discharging opening of conveying worm connects the inlet of rotary spherical digester, is provided with the mouth for being connected with dioxygen tank on rotary spherical digester;
Also comprise detention tank, diffuser, jordan, No. 1 reserve pit, EX desander, No. 2 reserve pits, bleaching machine, No. 3 reserve pits and pulp machine;
The discharging opening of rotary spherical digester connects diffuser;
Diffuser is connected with detention tank by pipeline;
Diffuser connects the inlet of jordan by pipeline, the discharging opening of jordan is connected in No. 1 reserve pit by pipeline, No. 1 reserve pit is connected to the inlet of EX desander by pipeline, the discharging opening of EX desander is connected to reserve pit No. 2 by pipeline, No. 2 reserve pits are connected to the inlet of bleaching machine by pipeline, the discharging opening of bleaching machine is connected in No. 3 reserve pits by pipeline, and No. 3 reserve pits are connected to the inlet of pulp machine by pipeline.
More excellent technical scheme, described cylinder filter is 200 order cylinder filters.
Large liquor ratio refers to that equivalent cotton linter situation alkali lye amount is large, and little liquor ratio refers to that equivalent cotton linter situation alkali lye amount is little.
Compared with prior art, the utility model has the advantage of: after cotton linter is fully wetting in large liquor ratio alkali lye, carry out little liquor ratio boiling, can save alkali 50% left and right, reduce black liquor 50% left and right, steam saving 50% left and right, slurry is washed easily and is floated well, improves the uniformity of boiling, significantly reduces product fault.
Brief description of the drawings
Fig. 1 is the block diagram of traditional cotton short flannel pulping by cooking system.
Fig. 2 is block diagram of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
The large liquor ratio of cotton linter is permeated little liquor ratio pulping by cooking system, comprises opener, air-introduced machine, de-burring machine, pressure fan, cyclone separator, pre-soaking pit, pressafiner, conveying worm, rotary spherical digester, dioxygen tank, returns alkali pond, cylinder filter and join alkali pond; Opener is sent to de-burring machine by air-introduced machine by cotton, and de-burring machine is sent to cyclone separator by pressure fan by cotton; Cyclone separator is provided with for the hole of air-discharging with for adding the hole of alkali lye; The cotton of the discharging opening output of cyclone separator is input to pressafiner after infiltrating through pre-soaking pit; Alkali lye after pressafiner squeezing is transported to go back to alkali pond, the alkali lye that goes back to alkali pond is transported to cylinder filter, cylinder filter is removed alkali lye after fiber fines and silt particle filter and is transported to and joins alkali pond, joins alkali pond and is connected with the hole that adds alkali lye of described cyclone separator by pipeline; The discharging opening of pressafiner connects the inlet of conveying worm, and the discharging opening of conveying worm connects the inlet of rotary spherical digester, is provided with the mouth for being connected with dioxygen tank on rotary spherical digester; Also comprise detention tank, diffuser, jordan, No. 1 reserve pit, EX desander, No. 2 reserve pits, bleaching machine, No. 3 reserve pits and pulp machine; The discharging opening of rotary spherical digester connects diffuser; Diffuser is connected with detention tank by pipeline; Diffuser connects the inlet of jordan by pipeline, the discharging opening of jordan is connected in No. 1 reserve pit by pipeline, No. 1 reserve pit is connected to the inlet of EX desander by pipeline, the discharging opening of EX desander is connected to reserve pit No. 2 by pipeline, No. 2 reserve pits are connected to the inlet of bleaching machine by pipeline, the discharging opening of bleaching machine is connected in No. 3 reserve pits by pipeline, and No. 3 reserve pits are connected to the inlet of pulp machine by pipeline.Wherein, described cylinder filter is 200 order cylinder filters.
Large liquor ratio osmosis process:
Join alkali pond and join alkali technique: alkali liquid temperature: normal temperature, alkali is dense: 30g/L, joins alkali lye amount: 60T, alkali charge: 1800Kg, YY-03 permeates dosage: 60T*0.02%=12Kg, anthrahydroquinone amount: 60T*0.01%=6Kg.
Pressafiner squeezing ratio: 1:1.5 is that 1T cotton linter contains 1.5T alkali lye
Large liquor ratio is permeated the operation that feeds intake:
(1) drive air-introduced machine, drive de-burring machine, drive pressure fan, start opener to cyclone separator feeding;
(2) open and join alkali pond alkali pump and beat alkali lye to cyclone separator, cotton linter mixes and stirs after wetting and falls in pre-soaking pit with alkali lye in cyclone separator.
(3) through 45-60min, feed intake complete, pre-soaking pit propeller, cotton linter is circulation cleaning, fully wetting in pond, and operation 60～120min, shuts down ball to be installed.Cotton linter at normal temperatures wetted key is the rapid osmotic effect that YY-03 auxiliary agent is play.
Dress ball:
(1) drive pre-soaking pit propeller, slurry circulates in pond.
(2) drive pressafiner, drive conveying worm.
(3) drive the long fine pump of pre-soaking pit, to pressafiner, for water slurry, press ratio: 1:1.5 is that 1T cotton linter contains 1.5T alkali lye
(4) alkali lye after squeezing is transported to go back to alkali pond
(5) return alkali pond alkali lye and be transported to 200 order cylinder filters, remove fiber fines and silt particle
(6) alkali lye after the net filtration of garden is transported to and joins alkali pond
(7) once fill after ball, join alkali pond alkali lye and will reduce theoretical reduction: the 1.5*4.5=6.75T of calculating of 7-8T(), 30g/L alkali is dense will reduce 0.5-1.5g/L, by large liquor ratio technique, supplement alkali, YY-03 and anthrahydroquinone amount while minimizing, be again mixed with 60T alkali lye, for subsequent use.
(8) dress ball 45-60min, the complete ratio of dress ball, upper spherical cap, opens rotary spherical digester, idle running 10min intensification, insulation, large steam bleeding:
(1) 30min that once heats up, is raised to 140 DEG C, steam bleeding 10min, and temperature drops to 120 DEG C, and secondary temperature elevation 20min is raised to 160 DEG C, 10min, temperature drops to 140 DEG C, and three times intensification 20min is raised to 172 DEG C, insulation 120min
(2) insulation finishes, and carries out large steam bleeding, and now little liquor ratio boiling finishes.
In dioxygen water polo, steam and float:
(1) hydrogen peroxide preparing process: hydrogen peroxide consumption: 5%(cotton linter oven-dry weight * 5%) i.e. 30% hydrogen peroxide 521Kg, MgSO4 consumption: 0.2%(cotton linter oven-dry weight * 0.2%), preparation liquor ratio: 1:3.0(1T over dry velveteen: 3T hydrogen peroxide mixed liquor) be 13.5T
(2) in the time that temperature in ball drops to 105 DEG C, pump into 13.5T hydrogen peroxide, under the operating mode of 70-100 DEG C, steam and float 80min, whiteness > 70%, fault is removed, and it is micro-faint yellow that black liquor is, and PH is at 9-10, steam bleeding 10min, the batch turning of uncapping, steams and floats end.
YY-03 quickly penetrating agent is the key that realizes the infiltration of large liquor ratio, and bleeding agent impels alkali lye rapid osmotic to inside fiber, the assorted title such as cottonseed fragment, cotton boll fragment, and alkali lye permeates uniformly, is conducive to that cotton linter is accelerated saponification degreasing and impurity is removed in emulsification.Rotary spherical digester rotates heating mode (non-convection current is heated), causes large portion steam to enter into the vapor phase space on top, forms top high temperature high (high-temperature region), bottom liquidus temperature low (low-temperature space), and upper and lower temperature differs 20-30 DEG C.Liquor ratio is larger, and low-temperature space is larger, and the temperature difference is the main cause that causes half steaming even, and little liquor ratio boiling can improve temperature distribution evenness in ball, improves cooking homogeneities.Cotton linter in saponification, emulsification series of chemical, the alkali number that consumes less than 1/3 of cotton linter absorption alkali number, under the condition fully infiltrating at alkali lye, large liquor ratio is to do harm rather than good, cooking liquor ratio: 1:1～2 are feasible, and liquor ratio is little, ball is interior without unnecessary alkali lye, slurry is in vapor phase space completely, and Temperature Distribution is even one in ball, and degreasing is complete, fiber cell wall destroys fully, fault is removed clean, degree of polymerization distribution good uniformity, and the reactivity worth of pulp is good.Little liquor ratio boiling saves alkali 526.5Kg/ ball than traditional boiling,, produce less black liquor 12.5T/ ball, reduce waste water control cost.After little liquor ratio boiling, then carry out 5% hydrogen peroxide steaming and float, whiteness > 70%, after oven dry, whiteness > 78%, oneself is micro-faint yellow boiling end liquid, through simply administering, just can qualified discharge.Little liquor ratio boiling joint alkali, energy-conservation, reduce and pollute, to improve the quality of products, little liquor ratio boiling can not only be applicable to chemical fiber pulp, is also applicable to purified cotton, security cotton pulp, nitrocotton, the cotton pulps such as absorbent cotton.The superiority of little liquor ratio pulping by cooking, will bring new economic benefit and new development to enterprise.
Claims (2)
1. the large liquor ratio of cotton linter is permeated little liquor ratio pulping by cooking system, it is characterized in that: comprise opener, air-introduced machine, de-burring machine, pressure fan, cyclone separator, pre-soaking pit, pressafiner, conveying worm, rotary spherical digester, dioxygen tank, return alkali pond, cylinder filter and join alkali pond;
Opener is sent to de-burring machine by air-introduced machine by cotton, and de-burring machine is sent to cyclone separator by pressure fan by cotton;
Cyclone separator is provided with for the hole of air-discharging with for adding the hole of alkali lye;
The cotton of the discharging opening output of cyclone separator is input to pressafiner after infiltrating through pre-soaking pit;
Alkali lye after pressafiner squeezing is transported to go back to alkali pond, the alkali lye that goes back to alkali pond is transported to cylinder filter, cylinder filter is removed alkali lye after fiber fines and silt particle filter and is transported to and joins alkali pond, joins alkali pond and is connected with the hole that adds alkali lye of described cyclone separator by pipeline;
The discharging opening of pressafiner connects the inlet of conveying worm, and the discharging opening of conveying worm connects the inlet of rotary spherical digester, is provided with the mouth for being connected with dioxygen tank on rotary spherical digester;
Also comprise detention tank, diffuser, jordan, No. 1 reserve pit, EX desander, No. 2 reserve pits, bleaching machine, No. 3 reserve pits and pulp machine;
The discharging opening of rotary spherical digester connects diffuser;
Diffuser is connected with detention tank by pipeline;
Diffuser connects the inlet of jordan by pipeline, the discharging opening of jordan is connected in No. 1 reserve pit by pipeline, No. 1 reserve pit is connected to the inlet of EX desander by pipeline, the discharging opening of EX desander is connected to reserve pit No. 2 by pipeline, No. 2 reserve pits are connected to the inlet of bleaching machine by pipeline, the discharging opening of bleaching machine is connected in No. 3 reserve pits by pipeline, and No. 3 reserve pits are connected to the inlet of pulp machine by pipeline.
2. the large liquor ratio of cotton linter according to claim 1 is permeated little liquor ratio pulping by cooking system, it is characterized in that: described cylinder filter is 200 order cylinder filters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103511.1U CN203741642U (en) | 2014-03-07 | 2014-03-07 | Small liquid ratio cooking and pulping system for large liquid ratio permeation of cotton linter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420103511.1U CN203741642U (en) | 2014-03-07 | 2014-03-07 | Small liquid ratio cooking and pulping system for large liquid ratio permeation of cotton linter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203741642U true CN203741642U (en) | 2014-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420103511.1U Expired - Lifetime CN203741642U (en) | 2014-03-07 | 2014-03-07 | Small liquid ratio cooking and pulping system for large liquid ratio permeation of cotton linter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203741642U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425263A (en) * | 2018-05-14 | 2018-08-21 | 薛润林 | A kind of cotton linter alkali-compressed air pulping process and device |
| CN109112873A (en) * | 2018-08-13 | 2019-01-01 | 薛润林 | The method of twin-screw extruder production purified cotton |
-
2014
- 2014-03-07 CN CN201420103511.1U patent/CN203741642U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108425263A (en) * | 2018-05-14 | 2018-08-21 | 薛润林 | A kind of cotton linter alkali-compressed air pulping process and device |
| CN109112873A (en) * | 2018-08-13 | 2019-01-01 | 薛润林 | The method of twin-screw extruder production purified cotton |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HEFEI YINSHAN COTTON + LINEN CO., LTD. Free format text: FORMER OWNER: XUE RUNLIN Effective date: 20140911 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 210042 NANJING, JIANGSU PROVINCE TO: 230011 HEFEI, ANHUI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140911 Address after: 230011 No. 658 Changjiang East Road, Anhui, Hefei Patentee after: HEFEI YINSHAN COTTON & LINEN CO.,LTD. Address before: Longpan road Xuanwu District of Nanjing city in Jiangsu province 210042 No. 149 Building 2 Room 102 in Lake habitat Patentee before: Xue Runlin |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Small liquid ratio cooking and pulping system for large liquid ratio permeation of cotton linter Effective date of registration: 20181019 Granted publication date: 20140730 Pledgee: Hefei Hengfeng Real Estate Development Co.,Ltd. Pledgor: HEFEI YINSHAN COTTON & LINEN CO.,LTD. Registration number: 2018340000567 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190227 Granted publication date: 20140730 Pledgee: Hefei Hengfeng Real Estate Development Co.,Ltd. Pledgor: HEFEI YINSHAN COTTON & LINEN CO.,LTD. Registration number: 2018340000567 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Small liquid ratio cooking and pulping system for large liquid ratio permeation of cotton linter Effective date of registration: 20190329 Granted publication date: 20140730 Pledgee: Hefei Hengfeng Real Estate Development Co.,Ltd. Pledgor: HEFEI YINSHAN COTTON & LINEN CO.,LTD. Registration number: 2019340000164 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20220802 Granted publication date: 20140730 Pledgee: Hefei Hengfeng Real Estate Development Co.,Ltd. Pledgor: HEFEI YINSHAN COTTON & LINEN CO.,LTD. Registration number: 2019340000164 |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140730 |