CN101053712A - Superfine molecular sieves filtering separating and mother solution recovering method - Google Patents
Superfine molecular sieves filtering separating and mother solution recovering method Download PDFInfo
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- CN101053712A CN101053712A CN 200710200782 CN200710200782A CN101053712A CN 101053712 A CN101053712 A CN 101053712A CN 200710200782 CN200710200782 CN 200710200782 CN 200710200782 A CN200710200782 A CN 200710200782A CN 101053712 A CN101053712 A CN 101053712A
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Abstract
The invention relates to a method of filter separator of superfine molecular sieve and mother liquor recovery, comprising: firstly, the superfine molecular sieve seriflux is intensively mixed and pulp uniformly in the storage tank; the superfine molecular sieve seriflux is fed into the filter unit specially designed by the pump; the superfine molecular sieve seriflux is filtrated through the filter unit and then the filtrate flows into to the collecting tank; lastly, the seriflux concentrated flows back into the storage tank; the said filter unit accepts the superfine molecular sieve seriflux to do rapid turbulent motion in the channel with filter cloth where a layer of thin filter cake is formed, and liquid of the superfine molecular seriflux infiltrates out perpendicularly through the thin filter cake and the filter cloth to form perpendicular interlacing between the flow direction of superfine molecular sieve seriflux and that of the filtrate; the filtrate is connected as the mother liquor after flowing into the connecting tank. The method for filtrating using the cross-flow type thin filter cake, is capable of executing liquid-solid separation of superfine molecular sieve, especially for the high viscosity superfine molecular sieve, and recovery of the uperfine molecular sieve mother liquor is capable of reducing the cost of molecular sieve effectively, and abating the pollution to environment.
Description
Technical field
The present invention relates to a kind of superfine molecular sieves filtering and separate the method that reclaims with mother liquor.
Background technology
Superfine molecular sieves refers to the molecular sieve particle diameter below 1 μ m, especially less than the fine grain molecular sieve of 0.5 μ m, compares with the big crystal grain molecular sieve of routine, has plurality of advantages such as activity is high, selectivity is good.Along with the progress of industry science and technology such as oil refining, chemical industry, its production and application are also more and more widely.A significant problem that faces in the superfine molecular sieves production at present is how to carry out high efficiency liquid-solid separation, and does not influence properties of product.In general, molecular sieve is thin more, and its separating difficulty is big more, and particularly nano level molecular sieve is suspended state in liquid, and traditional gravitational settling almost can't use; And be the various traditional filtering technology of filter medium with the filter cloth, its separative efficiency is very low, and the filtrate quality also is difficult to guarantee; Adopt ultracentrifuge, slurries its efficient lower to solid content is extremely low; Add the flocculant filtration and then can influence properties of product.Therefore, the liquid-solid separation of superfine molecular sieves often becomes the principal element that influences product yield, cost, quality.
In order to solve the separation problem of superfine molecular sieves, a kind of mode is to adopt the filter medium in finer and closely woven aperture, it is the separation method of the HTS of 0.2 μ m that CN1116099C discloses a kind of membrane separator particle separation diameter that adopts, but this method then can cause filter opening to stop up in filter process for full-bodied molecular sieve pulp (as beta-molecular sieve, SAPO series molecular sieve etc.), is difficult to directly carry out Separation of Solid and Liquid.
Another kind of mode is to utilize the novel filter types of employing such as traditional filter material such as filter cloth to reach the separating effect of superfine molecular sieves, does not still have relevant report at present.CN1261215C discloses a kind of filter method of nano molecular sieve, and this method added alkaline medium before nano molecular sieve filters, make to prevent non-crystallized SiO with this in pH value of solution 〉=12
2Cohesion; CN1195678C discloses a kind of filter method of Y zeolite aqueous slurry, the mixture that in slurries, has added alkali or alkali and salt during filtration, this method can significantly be accelerated the rate of filtration of a friendship one roasting Y zeolite aqueous slurry, but above two kinds have additionally increased production cost, and do not propose how specifically to carry out the separation method of superfine molecular sieves.CN1191125C discloses the separation method of molecular sieve catalyst in a kind of ketoamine oximation reaction system, and this method adopts common sedimentation method to separate, and efficient is low, carries out in industrial being difficult to.
To produce a large amount of crystallization mother liquors in the molecular sieve production process, directly discharging will cause certain environmental pollution, if mother liquor can be recycled and can not only effectively be reduced production costs, and reduce blowdown.For low viscous molecular sieve pulp, as ZSM? molecular sieve pulp, MCM? 2 molecular sieve pulps etc. can adopt traditional filter cloth filter type (as flame filter press, band filter etc.) or inoranic membrane system to isolate the molecular sieve mother liquor; For full-bodied molecular sieve pulp (as beta-molecular sieve, SAPO series molecular sieve etc.) with above filter type then owing to reasons such as filter opening obstruction are difficult to mother liquor is separated.
Summary of the invention
The objective of the invention is to be innovated at the shortcoming and defect in the background technology, provide a kind of and can carry out the liquid-solid separation of superfine molecular sieves expeditiously, especially can carry out the Separation of Solid and Liquid of full-bodied molecular sieve pulp, the molecular sieve mother liquor is reclaimed, reduce the molecular sieve production cost effectively, and reduce the method that a kind of superfine molecular sieves filtering separates and mother liquor reclaims of environmental pollution
Method of the present invention comprises:
A) at first the superfine molecular sieves slurries are stirred fully making beating evenly in storage tank; By pump the superfine molecular sieves slurries are delivered into the filter of particular design again; The superfine molecular sieves slurries filter rear filtrate through filter and enter collecting tank; Slurries after concentrating at last return in the storage tank;
B) described filter is accepted ultra-fine molecule slurries and do quick turbulent motion in being provided with the runner of filter cloth, and formation one deck approaches filter cake on filter cloth, liquid vertically passes and approaches filter cake and filter cloth infiltration and go out the form of formation superfine molecular sieves slurries flow direction and filtrate flows direction vertical interlaced in the ultra-fine molecule slurries;
C) filtrate can be collected as mother liquor after entering collecting tank.
The inventive method is compared with separation method with the processing of existing superfine molecular sieves, and significantly advantage is: 1) yield height, can hold back active high fine grain molecular sieve effectively; 2) can carry out the isolated by filtration of superfine molecular sieves with conventional filtration media, low, the long service life of equipment cost; 3) technological process is simple, can carry out filtering and concentrating, production efficiency height continuously; 4) can carry out isolated by filtration to full-bodied superfine molecular sieves slurries, mother liquor is recycled, reduce the production cost.
Description of drawings
Fig. 1 is a cross-current type thin bed filtration separating ultra-fine molecular sieve device schematic diagram
Fig. 2 is one of filtering and concentrating modular construction schematic diagram
Fig. 3 is two of a filtering and concentrating modular construction schematic diagram
The specific embodiment
By Fig. 1 to 3 as can be known, the present invention includes:
A) at first the superfine molecular sieves slurries are stirred fully making beating evenly in storage tank 1; By pump 2 the superfine molecular sieves slurries are delivered into the filter 3 of particular design again; The superfine molecular sieves slurries filter rear filtrate through filter and enter collecting tank 4; Slurries after concentrating at last return in the storage tank 1;
B) described filter 3 is accepted ultra-fine molecule slurries and do quick turbulent motion in the runner that is provided with filter cloth 6, and formation one deck approaches filter cake on filter cloth 6, liquid vertically passes and approaches filter cake and filter cloth 6 infiltrations and go out the form of formation superfine molecular sieves slurries flow direction and filtrate flows direction vertical interlaced in the ultra-fine molecule slurries;
C) filtrate can be collected as mother liquor after entering collecting tank 4.
Molecular sieve pulp of the present invention flows and is turbulence state, and constantly the thin layer filter cake is washed away, so cake layer maintains the thin layer state all the time; Because less perpendicular to the power of filter medium, thin layer can not destroy simultaneously, therefore filters and maintains cross-current type thin layer cake filtration state all the time, and it is good that filter effect keeps always; Simultaneously, the intergranular space that is formed the thin layer filter cake by molecular sieve is generally much smaller than the space of filter medium, so molecular sieve is difficult to pass the thin layer filter cake and runs damage, and molecular sieve content is very low in the filtrate.The filter 3 of the particular design of indication refers to adopt the separation equipment of cross-current type thin layer cake filtration method.This method can be carried out isolated by filtration to full-bodied molecular sieve pulp, and mother liquor is recycled.
Describe the present invention in detail below in conjunction with accompanying drawing:
As shown in Figure 1, the superfine molecular sieves slurries stir fully making beating evenly in storage tank 1 after, be delivered into filtering and concentrating assembly 3 by pump 2, molecular sieve pulp is quick turbulent flow in the filtering and concentrating assembly, filtrate sees through thin layer filter cake and filter cloth by flowing out perpendicular to the slurries flow direction, and in the filtrate collecting tank 4 of going forward side by side, the slurries after concentrating return into storage tank 1, circulation so repeatedly reaches certain concentration (the general about 30-40% of solid content) until concentration of slurry; During washing, thin up in storage tank 1, and the repetition said process gets final product.
The filtering and concentrating assembly as shown in Figures 2 and 3, in Fig. 2, molecular sieve pulp is parallel to filter cloth and does quick turbulent flow in slurries flow frame 5, thin layer filter cake and filter cloth 6 that filtrate vertically sees through on the filter cloth enter in the filtrate collecting board 7 of band groove, and conflux, molecular sieve pulp constantly obtains filtering and concentrating in this process.In Fig. 3, molecular sieve pulp is parallel to filter cloth and does quick turbulent flow in the pipeline of liner filter cloth 6, thin layer filter cake and filter cloth 6 that filtrate vertically sees through on the filter cloth enter in the cavity of filtering and concentrating assembly, and conflux, and molecular sieve pulp equally constantly obtains filtering and concentrating in this process.
Embodiment 1
The isolated by filtration of nano-beta molecular sieve slurries and mother liquor reclaim (all wt percentage number average by weight in this specification)
With 7690 liters of solid contents 25% nano-beta molecular sieve (Na
2O content is 1%) slurries (d=1.30g/cm
3) (material is 0Cr18Ni9Ti to the storage tank 1 of packing into, 5m
3) in, be conveyed into pump 2 (321 material) that (flow velocity is 30m
3/ h) filtering and concentrating assembly 3 carries out isolated by filtration, slurries are turbulence state and are parallel to filter cloth and flow, partial mother liquid goes out perpendicular to the filter cloth infiltration through thin layer filter cake and filter cloth, and collect in the filtrate collecting tank, enrichment slurries return storage tank 1, it is about 42% that so circulation is concentrated into solid content, altogether 3200 liters in mother liquor.
During washing, in storage tank 1, add deionized water and be diluted to enter once more behind the solid content about 10% and carry out Separation of Solid and Liquid in the filtering and concentrating assembly 3, the filtrate blowdown, the dilution washing separates 6 times so repeatedly, adopts a meter beta-molecular sieve sample detection Na
2O content stops washing less than 0.05%, and slurries continue circulation, and to be concentrated into solid content be about 45%, then by tray dried (120 ℃, 24h), obtain 2449 kilograms of nano-beta molecular sieves (butt), yield 98%, the molecular sieve average grain diameter is 100 nanometers.
The a large amount of template agent of content in the mother liquor that reclaims, it is synthetic that this mother liquor instead of part template agent is used for nano-beta molecular sieve, and the product of gained is pure nano-beta molecular sieve; The method is than normal synthetic production cost low about 1/4th.
The isolated by filtration of superfine Ti ZSM-5 molecular sieve and mother liquor reclaim
With 4839 liters of solid contents 20% superfine Ti ZSM-5 molecular sieve crystallization slurries (d=1.24g/cm
3) the storage tank 1 (5m that packs into and serve as a contrast enamel
3) in, be conveyed into pump 6 (lining tetrafluoroethene pump) that (flow velocity is 40m
3/ h) filtering and concentrating assembly 3 carries out isolated by filtration, slurries are turbulence state and are parallel to filter cloth and flow, partial mother liquid goes out perpendicular to the filter cloth infiltration through thin layer filter cake and filter cloth, and collect in the filtrate collecting tank, enrichment slurries return storage tank 1, it is about 40% that so circulation is concentrated into solid content, altogether 2500 liters in mother liquor.
During washing, in storage tank 1, add deionized water and be diluted to and enter filtering and concentrating assembly 3 once more behind the solid content about 8% and carry out Separation of Solid and Liquid, the filtrate blowdown, the dilution washing separates 4 times so repeatedly, and recording filtrate liquid pH value is 6.5; Stop washing, slurries continue circulation, and to be concentrated into solid content about 42%, then by tray dried (120 ℃, 22h), obtain 1152 kilograms in superfine Ti ZSM-5 molecular sieve (butt), yield 96%, the molecular sieve average grain diameter is 200 nanometers.
The a large amount of template agent of content in the mother liquor that reclaims, it is synthetic that this mother liquor instead of part template agent is used for ZSM-5 molecular sieve (comprising the Ti-ZSM-5 molecular sieve), and the product of gained is pure ZSM-5 molecular sieve; The method is than normal synthetic production cost low about 1/5th.
The isolated by filtration of ultra-fine ZSM-5 molecular sieve and mother liquor reclaim
With 6145 liters of solid contents be 20% and the pH value be 13 ZSM-5 molecular sieve pulp (d=1.22g/cm
3) (material is 316L to the storage tank 1 of packing into, 5m
3) in, be conveyed into pump 2 (321 material) that (flow velocity is 40m
3/ h) filtering and concentrating assembly 3 carries out isolated by filtration, slurries are turbulence state and are parallel to filter cloth and flow, partial mother liquid goes out perpendicular to the filter cloth infiltration through thin layer filter cake and filter cloth, and collect in the filtrate collecting tank, enrichment slurries return storage tank 1, it is about 35% that so circulation is concentrated into solid content, altogether 2800 liters in mother liquor.
During washing, in storage tank 1, add deionized water and be diluted to and enter filtering and concentrating assembly 3 once more behind the solid content about 10% and carry out Separation of Solid and Liquid, the filtrate blowdown, the dilution washing separates 7 times so repeatedly, and recording filtrate liquid pH value is 7.5; Stop washing, slurries continue circulation, and to be concentrated into solid content about 42%, then by tray dried (130 ℃, 24h), obtain 1454 kilograms in ultra-fine ZSM-5 molecular sieve (butt), yield 97%, the molecular sieve average grain diameter is 270 nanometers.
Certain template agent, silica and the alkali of content in the mother liquor that reclaims, it is synthetic that these mother liquor instead of part raw material are used for the ZSM-5 molecular sieve, and the product of gained is pure ZSM-5 molecular sieve; The method is than normal synthetic production cost low about 1/7th.
The isolated by filtration of SAPO-11 molecular sieve pulp and mother liquor reclaim
With 2320 liters of solid contents 24% SAPO-11 molecular sieve pulp (d=1.27g/cm
3) (material is 316L to the storage tank 1 of packing into, 5m
3) in, be conveyed into pump 2 (316L material) that (flow velocity is 30m
3/ h) filtering and concentrating assembly 3 carries out isolated by filtration, slurries are turbulence state and are parallel to filter cloth and flow, partial mother liquid goes out perpendicular to the filter cloth infiltration through thin layer filter cake and filter cloth, and collect in the filtrate collecting tank, enrichment slurries return storage tank 1, it is about 40% that so circulation is concentrated into solid content, altogether 1000 liters in mother liquor.
During washing, in storage tank 1, add deionized water and be diluted to and enter filtering and concentrating assembly 3 once more behind the solid content about 12% and carry out Separation of Solid and Liquid, the filtrate blowdown, the dilution washing separates 4 times so repeatedly; Stop washing, slurries continue circulation, and to be concentrated into solid content about 42%, then by tray dried (130 ℃ 24h), obtain 672 kilograms in SAPO-11 molecular sieve (butt), yield 95%, the about 0.8 μ m of molecular sieve average grain diameter.
The certain template agent of content in the mother liquor that reclaims, it is synthetic that these mother liquor instead of part raw material are used for the SAPO-11 molecular sieve, and the product of gained is pure SAPO-11 molecular sieve; The method is than normal synthetic production cost low about 1/5th.
Comparative Examples 1
The isolated by filtration and the mother liquor that adopt inorganic membrane integral system to carry out the nano-beta molecular sieve slurries reclaim
With 1538 liters of solid contents 25% nano-beta molecular sieve (Na
2O content is 1%) slurries (d=1.30g/cm
3) (material is 0Cr18Ni9Ti to the storage tank 1 of packing into, 5m
3) in, do not add the cohesion of ammonium chloride or ammonium nitrate, directly use pump (321 material) to be conveyed into that (flow velocity is 40m
3/ h) inoranic membrane separator (37036 type film pipes that adopt environmental protection Co., Ltd of Yue Yangxin section to provide, the film pore directly is 0.1 μ m) carry out Separation of Solid and Liquid (pressure is 0.2MPa), filtration begins in about 1 minute a small amount of filtrate is arranged, essentially no subsequently filtrate is flowed out, through overhaul, find the inorganic film tube surface by the obstruction of the molecular sieve pulp of thickness, filtrate can't be oozed out through the face duct.
Comparative Examples 2
The filtration washing that adopts the ultracentrifugation machine to carry out ultra-fine ZSM-5 molecular sieve separates
With 1229 liters of solid contents be 10% and the pH value be 13 ZSM-5 molecular sieve pulp (d=1.22g/cm
3) (material is 316L to the cut-back tank of packing into, 5m
3) in, be conveyed into pump (321 material) that (flow velocity is 20m
3/ h) ultracentrifuge (oasis, Nanjing machinery plant product, LWS420*1680-ND type horizontal centrifuge) carries out Separation of Solid and Liquid, and mother liquor is separated into liquid phase through hypervelocity and discharges, and mother liquor is collected, and solid phase (mainly being molecular sieve and water) is unloaded to cut-back tank (5m by scraper
3), and adding deionized water in cut-back tank, to be diluted to solid content about 5%, separating, washing is 7 times so repeatedly, records liquid phase PH valve less than 9; Stop washing, solid phase collected, then by tray dried (130 ℃, 24h), obtain ZSM-5 molecular sieve double centner, yield 66.7%, the molecular sieve average grain diameter is 300 nanometers.
Comparative Examples 3
The isolated by filtration and the mother liquor that adopt traditional filter centrifugal to carry out the SAPO-11 molecular sieve pulp reclaim
With 2320 liters of solid contents 24% SAPO-11 molecular sieve pulp (d=1.27g/cm
3) (material is 316L to the storage tank 1 of packing into, 5m
3) in, carry out isolated by filtration from flowing into traditional filter centrifugal, filtrate is collected, and water washs (filtrate is not collected during washing) to filter cake, collect filter cake, filter finish after, collect solid content altogether and be 46% 1106 kilograms of filter cakes (butt is 509 kilograms), yield is 72%, collects 850 liters in mother liquor simultaneously.
The same certain template agent of content in the mother liquor that reclaims, it is synthetic that these mother liquor instead of part raw material are used for the SAPO-11 molecular sieve, and the product of gained is pure SAPO-11 molecular sieve.
Table 1 embodiment effect contrast table
| Separation method | Superfine molecular sieves slurries type | Could continued operation | Yield % | Could reclaim mother liquor | Explanation | |
| Embodiment 1 | The cross-current type thin bed filtration | The nano-beta molecular sieve slurries | Can | 98 ? | Can | |
| Embodiment 2 | The cross-current type thin bed filtration | Superfine Ti ZSM-5 molecular sieve pulp | Can | 96 ? | Can | |
| Embodiment 3 | The cross-current type thin bed filtration | Ultra-fine ZSM-5 molecular sieve pulp | Can | 97 ? | Can | |
| Embodiment 3 | The cross-current type thin bed filtration | The SAPO-11 molecular sieve pulp | Can | 95 ? | Can | |
| Comparative Examples 1 | The inoranic membrane system | The nano-beta molecular sieve slurries | / | / | Not | Face stops up |
| Comparative Examples 2 | Ultracentrifuge | Superfine Ti ZSM-5 molecular sieve pulp | Not | 66.7 | Can | Yield is low |
| Comparative Examples 3 | Filter centrifugal | The SAPO-11 molecular sieve pulp | Not | 72 | Can | Yield is low |
Claims (4)
1. a superfine molecular sieves filtering separates the method that reclaims with mother liquor, it is characterized in that this method comprises:
A) at first the superfine molecular sieves slurries are stirred fully making beating evenly in storage tank (1); By pump (2) the superfine molecular sieves slurries are delivered into the filter (3) of particular design again; The superfine molecular sieves slurries filter rear filtrate through filter and enter collecting tank (4); Slurries after concentrating at last return in the storage tank (1);
B) described filter (3) is accepted ultra-fine molecule slurries and do quick turbulent motion in the runner that is provided with filter cloth (6), and at the last thin filter cake of one deck that forms of filter cloth (6), liquid vertically passes and approaches filter cake and filter cloth (6) infiltration and go out the form of formation superfine molecular sieves slurries flow direction and filtrate flows direction vertical interlaced in the ultra-fine molecule slurries;
C) filtrate can be collected as mother liquor after entering collecting tank (4).
2. separate the method that reclaims with mother liquor according to the said a kind of superfine molecular sieves filtering of claim 1, it is characterized in that: molecular sieve pulp flows and is turbulence state, and constantly the thin layer filter cake is washed away, so cake layer maintains the thin layer state all the time; Because less perpendicular to the power of filter medium, thin layer can not destroy simultaneously, therefore filters and maintains cross-current type thin layer cake filtration state all the time, and it is good that filter effect keeps always; Simultaneously, the intergranular space that is formed the thin layer filter cake by molecular sieve is generally much smaller than the space of filter medium, so molecular sieve is difficult to pass the thin layer filter cake and runs damage, and molecular sieve content is very low in the filtrate.
3. separate the method that reclaims with mother liquor according to the said a kind of superfine molecular sieves filtering of claim 1, it is characterized in that: the filter of the particular design of indication (3) refers to adopt the separation equipment of cross-current type thin layer cake filtration method.
4. separate the method that reclaims with mother liquor according to the said a kind of superfine molecular sieves filtering of claim 1, it is characterized in that: this method can be carried out isolated by filtration to full-bodied molecular sieve pulp, and mother liquor is recycled.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935050A (en) * | 2010-09-10 | 2011-01-05 | 西北化工研究院 | Method for synthesizing silicoaluminophosphate molecular sieve by utilizing crystallization mother liquor |
| CN102145301A (en) * | 2010-12-29 | 2011-08-10 | 中国天辰工程有限公司 | Method for washing micron-level molecular sieve containing nano impurities |
| CN102225772A (en) * | 2011-04-15 | 2011-10-26 | 大连理工大学 | Method for utilizing molecular sieve systhesis mother liquor |
| CN104030499A (en) * | 2014-05-22 | 2014-09-10 | 浙江工业大学 | Comprehensive treatment method of special-type molecular sieve synthesis mother solution |
| CN105214381A (en) * | 2015-10-14 | 2016-01-06 | 中国石油化工股份有限公司 | The separating and filtering method of SAPO Crystallization of Zeolite slurry |
| CN114797216A (en) * | 2022-05-23 | 2022-07-29 | 江苏泰氟龙防腐设备有限公司 | Vapor-liquid separator for polytetrafluoroethylene lining production |
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2007
- 2007-06-07 CN CNB2007102007823A patent/CN100506345C/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101935050A (en) * | 2010-09-10 | 2011-01-05 | 西北化工研究院 | Method for synthesizing silicoaluminophosphate molecular sieve by utilizing crystallization mother liquor |
| CN101935050B (en) * | 2010-09-10 | 2012-06-20 | 西北化工研究院 | Method for synthesizing silicoaluminophosphate molecular sieve by utilizing crystallization mother liquor |
| CN102145301A (en) * | 2010-12-29 | 2011-08-10 | 中国天辰工程有限公司 | Method for washing micron-level molecular sieve containing nano impurities |
| CN102225772A (en) * | 2011-04-15 | 2011-10-26 | 大连理工大学 | Method for utilizing molecular sieve systhesis mother liquor |
| CN104030499A (en) * | 2014-05-22 | 2014-09-10 | 浙江工业大学 | Comprehensive treatment method of special-type molecular sieve synthesis mother solution |
| CN104030499B (en) * | 2014-05-22 | 2015-10-28 | 浙江工业大学 | A kind of integrated conduct method of extraordinary molecular sieve synthesis mother liquid |
| CN105214381A (en) * | 2015-10-14 | 2016-01-06 | 中国石油化工股份有限公司 | The separating and filtering method of SAPO Crystallization of Zeolite slurry |
| CN114797216A (en) * | 2022-05-23 | 2022-07-29 | 江苏泰氟龙防腐设备有限公司 | Vapor-liquid separator for polytetrafluoroethylene lining production |
| CN114797216B (en) * | 2022-05-23 | 2023-09-05 | 江苏泰氟龙防腐设备有限公司 | Gas-liquid separator for producing tetrafluoro lining |
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