CN201809169U - Phosphorus pentoxide production equipment adopting forced refrigeration - Google Patents
Phosphorus pentoxide production equipment adopting forced refrigeration Download PDFInfo
- Publication number
- CN201809169U CN201809169U CN2010201372051U CN201020137205U CN201809169U CN 201809169 U CN201809169 U CN 201809169U CN 2010201372051 U CN2010201372051 U CN 2010201372051U CN 201020137205 U CN201020137205 U CN 201020137205U CN 201809169 U CN201809169 U CN 201809169U
- Authority
- CN
- China
- Prior art keywords
- phosphorus pentoxide
- flakes
- vanadium pentoxide
- forced refrigeration
- production
- 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.)
- Expired - Lifetime
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000005057 refrigeration Methods 0.000 title claims description 9
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 title abstract 14
- 238000001816 cooling Methods 0.000 claims abstract description 14
- 238000010521 absorption reaction Methods 0.000 claims abstract description 6
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 claims description 82
- OBSZRRSYVTXPNB-UHFFFAOYSA-N tetraphosphorus Chemical compound P12P3P1P32 OBSZRRSYVTXPNB-UHFFFAOYSA-N 0.000 claims description 14
- 125000004122 cyclic group Chemical group 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims 3
- 229910001220 stainless steel Inorganic materials 0.000 claims 3
- 239000002253 acid Substances 0.000 claims 2
- 229910000975 Carbon steel Inorganic materials 0.000 claims 1
- 239000010962 carbon steel Substances 0.000 claims 1
- 238000005507 spraying Methods 0.000 claims 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 abstract description 28
- 229910000147 aluminium phosphate Inorganic materials 0.000 abstract description 14
- 238000002485 combustion reaction Methods 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 10
- 238000005516 engineering process Methods 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 239000006227 byproduct Substances 0.000 abstract description 4
- BHEPBYXIRTUNPN-UHFFFAOYSA-N hydridophosphorus(.) (triplet) Chemical compound [PH] BHEPBYXIRTUNPN-UHFFFAOYSA-N 0.000 abstract description 3
- 238000012824 chemical production Methods 0.000 abstract 1
- 229910017053 inorganic salt Inorganic materials 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 16
- 238000004062 sedimentation Methods 0.000 description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 7
- 229910052698 phosphorus Inorganic materials 0.000 description 7
- 239000011574 phosphorus Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- 239000000047 product Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 239000002994 raw material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 239000012476 oxidizable substance Substances 0.000 description 2
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000003905 agrochemical Substances 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000003995 emulsifying agent Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 150000002903 organophosphorus compounds Chemical class 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000002367 phosphate rock Substances 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The utility model belongs to the technical field of phosphorous chemical production in the inorganic salt industry, and particularly relates to a brand-new phosphorus pentoxide production technology, which adopts the basic process as follows: air is dried and then continuously blown into a combustion chamber, so that raw yellow phosphorous flows into the combustion chamber and is then continuously combusted to generate phosphorus pentoxide smog; and the smog rises, meets an inclined plane baffle at the top of a tubular heat exchanger and is forced to pass through a plurality of tube nests from the lateral surface. Continuously-circulating water in the tube nests exchanges the heat of phosphorus pentoxide gas through the tube walls; and phosphorus pentoxide powders aggregate and fall into a collection hopper after heat exchange and cooling, and are packaged after being cooled and accumulated to a certain quantity. The incompletely-settled phosphorus pentoxide gas enters a circular absorption tower through a K-shaped connector; the circularly-sprayed water or diluted phosphoric acid is absorbed to generate a side product of phosphoric acid; and excess air is exhausted. The equipment solves the problems that the traditional natural cooling phosphorus pentoxide production method has high cost, high investment of equipment, low yield and the like.
Description
Technical field
The utility model belongs to the phosphorous chemical industry production technical field in the inorganic chemicals industry, is a kind of brand-new Vanadium Pentoxide in FLAKES production technology.
Background technology
Vanadium Pentoxide in FLAKES is very easily deliquescent white powder.Meet water and organism and emit a large amount of smog and heat, can cause burning as wood, the cotton or careless vigorous reaction that takes place.Be raw material and reagent common in the chemical industry, mainly make with extra care analytical reagent, organophosphorus compounds emulsifying agent and be used to make high-purity phosphoric acid as gas and liquid desicoant, the dewatering agent of organic synthesis, medicine.Be widely used in medicine, coatings additive(s), dyeing and printing auxiliary, static inhibitor, titanate coupling agent, agricultural chemicals, industries such as phosphorus oxychloride chemical industry.
At present, the production of Vanadium Pentoxide in FLAKES mainly is to use conventional methods production.Promptly adopt the yellow phosphorus dish to come balance yellow phosphorus liquid level, under air (handling) effect of sufficiently dry through the vitriol oil, the yellow phosphorus of yellow phosphorus dish inner disc is hung in the stove at roasting kiln and is burnt, and generates Vanadium Pentoxide in FLAKES and cooling-sedimentation in roasting kiln master stove, obtains white powder finished product Vanadium Pentoxide in FLAKES through collecting chamber cooling receipts.Owing to be to adopt naturally cooling in air entirely, thus the roasting kiln, settling pocket that need make a plurality of large volumes so that naturally cooling, the production line of every annual production 1 kiloton needs 1.5～2 meters of diameters, 4.5 to 9 meters 35 to 45 of head towers highly approximately.Thereby have mostly that cost height, facility investment are big, problem such as yield poorly.At present, scientific workers are are researching and developing the new production process of Vanadium Pentoxide in FLAKES, the direct high temperature production of the Rock Phosphate (72Min BPL) of employing is arranged, but this method exists redox to fail the improvement of much still needing such as fine isolation, production operation are difficult, quality product is relatively poor, yield is lower, perfect problem, and this method still fails to realize fully industrialization.
Summary of the invention
The purpose of this utility model is in order to overcome the deficiency of prior art, solve Vanadium Pentoxide in FLAKES and adopt big, the problem such as yield poorly of the cost height, the facility investment that exist in the conventional production methods of naturally cooling, proposed a kind of brand-new production method of forced refrigeration of Vanadium Pentoxide in FLAKES.
Structure of the present utility model is: spacious yellow phosphorus burning chamber, spacious settling pocket, place many heat exchanging pipes that all have endless tube to be communicated with up and down in the settling pocket, a plurality of bunker for collecting, K shape pipe jointer with a tiltedly long communicating pipe, tail gas recycle system phosphoric acid tower, circulation absorbs sour pump, with the spray tube of a plurality of shower nozzles etc.
Cardinal principle of the present utility model, flow process are as follows:
Air blasts the combustion chamber continuously after the sulfuric acid drying, make raw material yellow phosphorus flow into the white cigarette of continuous burning generation Vanadium Pentoxide in FLAKES behind the combustion chamber.The white cigarette of Vanadium Pentoxide in FLAKES is after rising to certain altitude, run into the inclined plate baffle on the tubular heat exchange top, be forced to pass from the side tubulation, have in the tubulation and do not stop round-robin water with heat by tube wall exchange Vanadium Pentoxide in FLAKES gas, the Vanadium Pentoxide in FLAKES powder of being lowered the temperature by heat exchange gathers and falls down, fall into bunker for collecting, cool off and run up to some amount after pack.Fail sedimentation completely Vanadium Pentoxide in FLAKES gas enter the circulation absorption tower by K shape junctor and long inclined tube, the water or the dilute phosphoric acid that are recycled injection absorb by-product phosphoric acid afterwards, surplus air emptying.
The utility model is compared with original technology, and advantage is:
But 1 high-temp combustion, throughput are big.
Old technology adopts the natural air cooling, cooling rate is very slow, so the combustion phosphorus amount of each roasting kiln unit time is very little, adopt the yellow phosphorus dish to come balance yellow phosphorus liquid level, the outer yellow phosphorus dish of stove is used for observing, control yellow phosphorus liquid level, and inner disc is hung in the stove at roasting kiln and burnt, and inner disc is little, the internal and external disk liquid level difference is very little, with control combustion phosphorus speed, avoided phosphorus and burnt out stove.The band water-cooling jacket is adopted in this novel process combustion chamber, and the bags is big, but burning high temperature, fast, fully carry out, big leap ahead production efficiency.
2, adopt the tubular heat exchange cooling, product cooling formation speed is fast.
The utility model adopts many heat exchanging pipes all having endless tube to be communicated with up and down, in time, as soon as possible Vanadium Pentoxide in FLAKES gas heat take away, the Vanadium Pentoxide in FLAKES powder can cool off sinking as early as possible, and can not influence the surplus air passage.
Associating, by-product phosphoric acid when 3, producing Vanadium Pentoxide in FLAKES can guarantee to produce Vanadium Pentoxide in FLAKES apace under the very high prerequisite of phosphorus yield.During the old technology Vanadium Pentoxide in FLAKES was produced, the Vanadium Pentoxide in FLAKES gas of uncolled sinking was emptying, thus in order to guarantee the phosphorus yield, Cai but the Vanadium Pentoxide in FLAKES throughput rate can not be too fast, will emptying after multistage naturally cooling sedimentation.In this novel method, the Vanadium Pentoxide in FLAKES gas of uncolled sinking is to send into tail gas recycle system phosphoric acid tower through K shape junctor, and water or dilute phosphoric acid circulation absorb the Vanadium Pentoxide in FLAKES gas in the tail gas.So the Vanadium Pentoxide in FLAKES gas in the sedimentation tower does not need long-time sedimentation complete, thereby can produce Vanadium Pentoxide in FLAKES apace.
4, the utility model required equipment is few, production capacity is big.
The production capacity of burning of the utility model (1.5 to 4.5 meters of diameters) sedimentation (4 to 12 meters of diameters) tower be equivalent to use old technology to need 40 to 55 of the head towers of 1.5～2 meters of diameters, 4.5 to 9 meters of height, thereby required equipment is few, production capacity is big.
Description of drawings
Accompanying drawing 1: the Vanadium Pentoxide in FLAKES forced refrigeration production absorption tower structural representation of burning sedimentation tower and coproduction phosphoric acid.
Accompanying drawing 2: for the A-A of Fig. 1 to view.
Embodiment
The utility model places the burning sedimentation tower of Vanadium Pentoxide in FLAKES production usefulness with tubular heat exchange, and the naturally cooling production that changes Vanadium Pentoxide in FLAKES is forced refrigeration production, has improved Vanadium Pentoxide in FLAKES production efficiency greatly.Be described further as follows below in conjunction with accompanying drawing and example to the utility model implementation step:
Air, makes raw material yellow phosphorus 2 flow into combustion chamber 3 back continuous burnings and generates Vanadium Pentoxide in FLAKES gas after dry air inlet 1 blasts in the combustion chamber 3 continuously through the sulfuric acid drying.Tubular heat exchange 6 is placed sedimentation tower 5.Vanadium Pentoxide in FLAKES gas is after rising to certain altitude, run into the inclined plate baffle on tubular heat exchange 6 tops, be forced to pass from the side the tubulation of tubular heat exchange 6, have in the tubulation and do not stop round-robin water with heat by tube wall exchange Vanadium Pentoxide in FLAKES gas, the Vanadium Pentoxide in FLAKES powder of being lowered the temperature by heat exchange gathers and falls down, fall into bunker for collecting 4, cool off and run up to some amount after pack.Failing the intact Vanadium Pentoxide in FLAKES gas of sedimentation enters circulation absorption tower 10 by K shape junctor 7, and water or dilute phosphoric acid be cyclic spray under the effect of sour pump 8, absorb Vanadium Pentoxide in FLAKES gas after by-product phosphoric acid send purification from exporting 9, surplus air is through chimney 11 emptyings.
Embodiment:
Per hour come dry 4 kilostere air input combustion chamber by oxygen enrichment operation (about 1: 8), yellow phosphorus flows into combustion chambers burn according to the flow of 120 kg per hour.Combustion chamber production temperature is controlled at 500 ℃ to 1200 ℃, 40 ℃ of recirculated cooling water inflow temperatures, and 93 ℃ of leaving water temperature(LWT)s, continuous burning 22 hours, stable equipment operation does not exist equipment to burn red, line clogging, phenomenons such as phosphorus are smokeed clogging, crossed to chimney.Produce 5.5 tons of Vanadium Pentoxide in FLAKES products, 0.8 ton of 85% phosphoric acid, the yield of phosphorus reaches 99.3%.Product detects through chemical examination, and quality is better, and index is as follows:
The Vanadium Pentoxide in FLAKES index:
| Index name | Index |
| Outward appearance | White powder |
| Content (P 2O 5)，％ | 98.5 |
| Water-insoluble, % | 0.02 |
| Heavy metal (in Pb), % | 0.0017 |
| Total nitrogen (N), % | 0.001 |
| Readily oxidizable substance is (with H 3PO 3Meter), % | 0.005 |
Index is as follows behind the gained phosphoric acid purification:
| Index name | Index |
| Outward appearance | Water white transparency or slightly light thick liquid |
| Concentration, % | 85.1 |
| Colourity was deceived once | 13 |
| Arsenic (in As), % | 0.00005 |
| Fluorine (in F), % | 0.0005 |
| Heavy metal (in Pb), % | 0.0006 |
| Muriate is (with Cl -Meter), % | 0.0001 |
| Vitriol is (with SO 4 2-Meter), % | 0.001 |
| Readily oxidizable substance is (with H 3PO 3Meter), % | 0.005 |
Claims (4)
1. a Vanadium Pentoxide in FLAKES forced refrigeration production unit is primarily characterized in that, is made up of yellow phosphorus burning chamber, tubular heat exchange, settling pocket, bunker for collecting, circulation absorption tower and K shape junctor.
2. a kind of Vanadium Pentoxide in FLAKES forced refrigeration production unit according to claim 1 is characterized in that cylinder that said yellow phosphorus burning chamber is made by stainless steel has the cooling drum chuck that carbon steel makes and forms.
3. a kind of Vanadium Pentoxide in FLAKES forced refrigeration production unit according to claim 1 is characterized in that said tubular heat exchange is made up of many uniform stainless steel tubulations of circle, and each is communicated with by a ring stainless steel pipe that has a plurality of outlets tubulation up and down.
4. a kind of Vanadium Pentoxide in FLAKES forced refrigeration production unit according to claim 1 is characterized in that said circulation absorption tower has cyclic acid pump, acid spraying tube and nozzle, and links to each other with settling pocket top by K shape junctor and pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201372051U CN201809169U (en) | 2010-03-22 | 2010-03-22 | Phosphorus pentoxide production equipment adopting forced refrigeration |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201372051U CN201809169U (en) | 2010-03-22 | 2010-03-22 | Phosphorus pentoxide production equipment adopting forced refrigeration |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201809169U true CN201809169U (en) | 2011-04-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201372051U Expired - Lifetime CN201809169U (en) | 2010-03-22 | 2010-03-22 | Phosphorus pentoxide production equipment adopting forced refrigeration |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201809169U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102910602A (en) * | 2012-10-26 | 2013-02-06 | 浙江诚泰化工机械有限公司 | Double-region device for efficiently recovering yellow phosphorus combustion heat |
| CN102992287A (en) * | 2011-09-16 | 2013-03-27 | 广西越洋化工实业集团有限公司 | Phosphorus pentoxide reinforced air cooling production method and equipment |
| CN103435020A (en) * | 2013-08-26 | 2013-12-11 | 防城港博森化工有限公司 | Discharging method and device in production of phosphorus pentoxide |
| CN103723695A (en) * | 2014-01-26 | 2014-04-16 | 湖北柳树沟化工科技有限公司 | Process and device for selectively producing phosphorus pentoxide |
-
2010
- 2010-03-22 CN CN2010201372051U patent/CN201809169U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102992287A (en) * | 2011-09-16 | 2013-03-27 | 广西越洋化工实业集团有限公司 | Phosphorus pentoxide reinforced air cooling production method and equipment |
| CN102992287B (en) * | 2011-09-16 | 2014-08-20 | 广西越洋化工实业集团有限公司 | Phosphorus pentoxide reinforced air cooling production method and equipment |
| CN102910602A (en) * | 2012-10-26 | 2013-02-06 | 浙江诚泰化工机械有限公司 | Double-region device for efficiently recovering yellow phosphorus combustion heat |
| CN103435020A (en) * | 2013-08-26 | 2013-12-11 | 防城港博森化工有限公司 | Discharging method and device in production of phosphorus pentoxide |
| CN103435020B (en) * | 2013-08-26 | 2015-08-26 | 防城港博森化工有限公司 | A kind of production discharging method and apparatus of Vanadium Pentoxide in FLAKES |
| CN103723695A (en) * | 2014-01-26 | 2014-04-16 | 湖北柳树沟化工科技有限公司 | Process and device for selectively producing phosphorus pentoxide |
| CN103723695B (en) * | 2014-01-26 | 2015-04-15 | 湖北柳树沟化工科技有限公司 | Process and device for selectively producing phosphorus pentoxide |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: GUANGXI SINO-LINCHEM INDUSTRIAL GROUP CO., LTD. Free format text: FORMER NAME: GUANGXI SINO-LINCHEM CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 530022 the Guangxi Zhuang Autonomous Region Nanning Qingxiu District Cambodia Road No. 9 sea. Asia international 4 Building No. 4-1601 Patentee after: Sino-Linchem Co., Ltd. Address before: 530022 the Guangxi Zhuang Autonomous Region Nanning Jin Pu Road 16 East International E building 22 room 2209 Patentee before: Sino-Linchem Co., Ltd. |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: FANGCHENGGANG BOSEN CHEMICAL TECHNOLOGY CO., LTD. Assignor: Sino-Linchem Co., Ltd. Contract record no.: 2015450000045 Denomination of utility model: Phosphorus pentoxide production equipment adopting forced refrigeration Granted publication date: 20110427 License type: Exclusive License Record date: 20150826 |
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| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Phosphorus pentoxide production equipment adopting forced refrigeration Effective date of registration: 20160509 Granted publication date: 20110427 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Nanning branch Pledgor: Guangxi Yueyang Technology Co., Ltd.|Guangxi Yueyang Chemical Industry Group Co., Ltd Registration number: 2016450000003 |
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Date of cancellation: 20170828 Granted publication date: 20110427 Pledgee: Pudong Shanghai Development Bank Limited by Share Ltd Nanning branch Pledgor: SINO-LINCHEM INTERNATIONAL, LNC.|Sino-Linchem Co., Ltd. Registration number: 2016450000003 |
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Effective date of registration: 20180808 Granted publication date: 20110427 |
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