CN103724459B - The method of the clear utilization of wastewater resource of a kind of glue - Google Patents
The method of the clear utilization of wastewater resource of a kind of glue Download PDFInfo
- Publication number
- CN103724459B CN103724459B CN201310723052.7A CN201310723052A CN103724459B CN 103724459 B CN103724459 B CN 103724459B CN 201310723052 A CN201310723052 A CN 201310723052A CN 103724459 B CN103724459 B CN 103724459B
- Authority
- CN
- China
- Prior art keywords
- filtration
- micro
- glue
- membrane
- rubber
- 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.)
- Active
Links
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to the method for the clear utilization of wastewater resource of a kind of glue, particularly relate to a kind of method reclaiming rubber and quebrachite from glue stripping water, belong to technical field of resource utilization of rubber.Step includes: the first step, filtered by microfiltration membrane by Jiao Qingfeishui, obtains micro-filtration concentrated solution and micro-filtration penetrating fluid; Second step, in micro-filtration concentrated solution, add aqueous sulfuric acid solidify, the solid obtained is carried out drying, the recovery rubber obtained; 3rd step, micro-filtration penetrating fluid to be filtered by ultra-filtration membrane, obtain ultrafiltration and concentration liquid and ultrafiltrated permeation liquid; 4th step, ultrafiltrated permeation liquid is sent into resin carry out purifying, and then obtain elutriant after wash-out, elutriant obtains Quebracho alcohol crystals through crystallization, recrystallization.The method reclaims dry glue and quebrachite from glue stripping water simultaneously, and waste resource reaches efficient recovery, has significant social benefit, environmental benefit and economic benefit.
Description
Technical field
The present invention relates to the method for the clear utilization of wastewater resource of a kind of glue, particularly relate to a kind of method reclaiming rubber and quebrachite from glue stripping water, belong to technical field of resource utilization of rubber.
Background technology
Natural rubber is the indispensable strategic materials of national defence and economic construction and scarce resource, and it is not only the lifeblood of modern economy, a kind of military affairs especially, diplomatic resource.In routine use, the output of revertex accounts for 10% ~ 15% of natural rubber ultimate production, Jiao Qingfeishui comes from the course of processing of concentrated latex, from rubber tree gather fresh natural rubber latex after whizzer, be divided into 40% revertex and the clear two portions of 60% glue.The rubber hydrocarbon of 15% is about had to stay Jiao Qingzhong along with most non-rubber component in fresh latex, contain except rubber whey except main in glue stripping water, also containing (Tang Qin such as a large amount of protein, lipid, carbohydrate and inorganic salts, shallow view Rubber Industrial Wastewater treatment technology [J]. tropical agriculture engineering, 2003 (2)).At present both at home and abroad the recovery method of skim rubber mainly contains dry glue absorption method and concentration and recovery method two kinds, but the shortcoming such as these two kinds of methods all have production cycle length, complex procedures, extra charge is many, rubber industry wastewater rate is lacked.
Quebrachite is a kind of active ingredient of natural product of high added value, have wide practical use in various fields such as medicine, makeup and food, the scientific research personnel of many countries is just being devoted to research is in the world the newtype drug that Material synthesis has optically-active structure with quebrachite, the medicine developed comprises carbohydrate, enzyme inhibitors, microbiotic, stereoisomerism inositol and several large class such as inositolophosphate and derivative thereof, these medicines can be used for Therapeutic cancer, the disease such as heart trouble and acquired immune deficiency syndrome (AIDS).
Domesticly utilize in the method for whey wastewater, there are some to report, such as patent (application number: 201110363990.1) report a kind of method reclaiming skim rubber, the method adopts tubular fibre membrane filtration Jiao Qingfeishui, cycles of concentration need control in 5 ~ 8 times, fouling membrane flux difficulty is recovered, and in film use procedure, easy fracture of wire leaks material, and unstable product quality, film replacement cost are high.Patent (application number: 201310007459.X) reports a kind of method extracting quebrachite from natural rubber glue-preparing exhausted water, the method adopts and adds the solid glue of heat abstraction and throw out, energy consumption is high, the wasting of resources, and adopt full membrane separating technique, product purity is low.
Summary of the invention
The object of this invention is to provide a kind of method that can reclaim rubber and quebrachite from glue stripping water, concrete technical scheme is:
A method for the clear utilization of wastewater resource of glue, comprises the steps:
The first step, Jiao Qingfeishui to be filtered by microfiltration membrane, obtain micro-filtration concentrated solution and micro-filtration penetrating fluid;
Second step, in micro-filtration concentrated solution, add aqueous sulfuric acid solidify, the solid obtained is carried out drying, the recovery rubber obtained;
3rd step, micro-filtration penetrating fluid to be filtered by ultra-filtration membrane, obtain ultrafiltration and concentration liquid and ultrafiltrated permeation liquid;
4th step, ultrafiltrated permeation liquid is sent into resin carry out purifying, and then obtain elutriant after wash-out, elutriant obtains Quebracho alcohol crystals through crystallization, recrystallization.
Jiao Qingfeishui of the present invention refers to that the glue that fresh natural rubber latex obtains after whizzer is clear.
In the first step, the step of Jiao Qingfeishui being carried out to micro-filtration mainly makes the rubber whey wherein contained be trapped concentrated, makes other component enter to per-meate side simultaneously.In order to obtain comparatively pure rubber whey, the selection of microfiltration membrane and micro-filtration processing parameter need to carry out preferably, if the transmembrane pressure of micro-filtration is too small, filtration flux then can be caused little, enough quebrachites cannot be reclaimed from permeate, in addition because a lot of components in glue stripping water are all the components belonging to easy pressurized, such as protein, fat, the clear macromole of glue etc., if transmembrane pressure is too small, these easy pressurized components can be stayed and retain side, causing cannot preferably by clear for glue macromole and protein, the magazins' layout such as fat are opened, these impurity stay in micro-filtration concentrated solution the quality that can have influence on and reclaim rubber, if transmembrane pressure is excessive, after more rubber whey pressurized can be had, enter into per-meate side, have influence on the yield reclaiming rubber, grope through lot of experiments, transmembrane pressure is 0.1 ~ 0.5MPa preferably.Mean pore size and the processing performance of microfiltration membrane have larger associating, if aperture is excessive, can causes rubber whey permeate rete, the rate of recovery is declined; If mean pore size is too small, then other some protein, fat can be caused also to stay and retain side, the quality of recovery rubber is affected.Grope through lot of experiments, preferably mean pore size is 50 ~ 200nm.In microfiltration process, crossflow velocity also has larger impact to separation performance and strainability, crossflow velocity can with membrane pore size and transmembrane pressure acting in conjunction, the flux that impact is filtered and the effect that different components is separated, if crossflow velocity is excessive, larger particle be easily subject to flow velocity impact and not easily at film surface deposition, small-particle is then easily accumulated in film surface, in addition, the cake layer formed on film surface is thinner, therefore some small-particle components are had through rete, if flow velocity is too small, flux then can be made too small, cause quebrachite yield few, also can cause being mixed with more small-particle impurity in rubber whey, the quality of rubber is reclaimed in impact, preferred crossflow velocity is 1 ~ 5m/s, concentration ratio can control make the volume of concentrated solution be 1/10 ~ 1/20 of glue stripping volume of water.
When the glue clear liquid obtaining micro-filtration membrane concentration and obtain, then can make rubber solids with acid solution, as further preferably, the mass concentration scope of aqueous sulfuric acid is 0.1 ~ 1%, and optimum is 0.5%.
In the third step, need again to filter micro-filtration penetrating fluid, this part can get rid of some other impurity in feed liquid, and one is prevent these impurity from entering in ultrafiltrated permeation liquid, affects the purity to quebrachite; Also can avoid these impurity of resin absorption carbohydrate, fat, albumen in addition, cause having an impact to the life-span of resin, and the adsorptive capacity to quebrachite can be affected, yield is declined.Preferred as this step, before carrying out ultrafiltration will by the pH regulator to 4.0 of feed liquid ~ 5.0 about, albumen can be made within the scope of this to reunite, and more albumen can also retain by the flux that not only can improve ultrafiltration, prevents it from having an impact to follow-up resin absorption.The mean pore size of ultra-filtration membrane is crossed conference and is caused more impurity to enter to permeate side, and the too small meeting of mean pore size causes infiltration capacity low, and cause the yield of quebrachite low, preferred aperture is 10 ~ 50nm, optimum 20nm; The transmembrane pressure of ultrafiltration crosses conference to be made some macromolecular colloid impurity compressive deformations and by rete, has influence on resin absorption and life-span, if the too small meeting of transmembrane pressure causes yield too low, and preferably 0.3 ~ 0.5MPa; Crossflow velocity also can have influence on filtration flux and particle through, preferred crossflow velocity is 2 ~ 4m/s.
In 4th step, resin can adopt polar resin or middle polarity resin, and during purifying, flow velocity is preferably 0.5 ~ 1.5BV/h, and elutriant preferred volume concentration is the methanol aqueous solution of 50% ~ 90%.
In an optimum embodiment of the present invention, the transmembrane pressure of micro-filtration is 0.3MPa, the mean pore size of microfiltration membrane is 50nm, the crossflow velocity of micro-filtration is 2m/s, the mean pore size of ultra-filtration membrane is 20nm, and the transmembrane pressure of ultrafiltration is 0.4MPa, and the crossflow velocity of ultrafiltration is 3m/s, flow velocity in resin purification is 1BV/h, and elutriant is the methanol aqueous solution of volumetric concentration 60%.
beneficial effect
The advantage of the solution of the present invention includes:
1. from glue stripping water, reclaim dry glue and quebrachite, waste resource reaches efficient recovery simultaneously, has significant social benefit, environmental benefit and economic benefit.
2., compared with conventional dry glue recovery method, the method has the advantages such as reagent consumption is few, energy consumption is low, separation efficiency is high, process is simple, with short production cycle, extra charge is few, rubber industry wastewater rate is high, good product quality.
3. reclaim with hollow-fibre membrane compared with dry gluing method, the method have that cycles of concentration is 2 times of tubular fibre cycles of concentration, reagent consumption is tubular fibre recovery method 1/2, stable, the film long service life (3 ~ 10 years) of film, film replacement charge is low, Membrane cleaning expense is low, quality product is excellent and the advantage such as stable.
4. adopt film process as resin purification technology pre-treating technology, remove solid glue with traditional heating to compare with throw out pre-treating technology, not only reclaim dry glue composition in waste water, reach the object that resource utilization effectively utilizes, there is the advantages such as energy consumption is low, rubber constituent clearance is high, system impact resistance is high, stable effluent quality, subsequent technique load are little simultaneously.
5. adopt film process as resin purification technology pre-treating technology, can rubber constituent, macromolecular substance well in the waste water of place to go, without the need to precipitating with activated carbon decolorizing, calcium oxide after micro-filtration, directly carry out resin purification.
6. film process is as resin purification technology pre-treating technology, and resin saturated extent of adsorption and extraction yield increase, and all improve more than 20% than prior art.
7. adopt resin purification technology to reclaim quebrachite, reclaim quebrachite ratio with full embrane method, possess skills ripe, simple to operate, more advantages of higher, sample purity of carrying can reach more than 99.5% to product purity.
Embodiment
Embodiment 1
The glue stripping water 10L of fresh natural rubber latex after centrifugal is got from rubber plant, first filtered by Alumina Membrane for Microfiltration, mean pore size is 200nm, and transmembrane pressure is 0.1MPa, crossflow velocity is 1m/s, concentration operation is carried out to Jiao Qingfeishui, obtains the concentrated solution of 1L and the micro-filtration penetrating fluid of 9L, then micro-filtration penetrating fluid feeding zirconium white ultra-filtration membrane is filtered, the mean pore size of ultra-filtration membrane is 20nm, transmembrane pressure 0.3MPa, crossflow velocity is 2m/s, obtains ultrafiltrated permeation liquid.
Ultrafiltrated permeation liquid sends into Semi-polarity resin column (column volume 2L) again, flow velocity 1BV/h, after processing, with 50% methanol-eluted fractions (2L), collect elutriant, after suction filtration, underpressure distillation obtains 200g concentrated solution, crystal is collected after static 24h at 0 DEG C, Quebracho alcohol crystals 10g is obtained 3 times, color and luster white, purity 97.6% by 80% recrystallizing methanol.
The sulphuric acid soln adding mass concentration 0.5% in micro-filtration concentrated solution solidifies, and obtains solid drying and becomes the dry glue of 290g, rubber industry wastewater rate 91%.
In contrast, when microfiltration membrane adopts the hollow-fibre membrane of aperture 200nm to Jiao Qingfeishui process, when concentrated solution volume is down to 3L, the flux of filtration procedure is unsuitable for engineer applied, there will be fracture of wire, situation that flux cannot wash recovery.
Embodiment 2
The glue stripping water 10L of fresh natural rubber latex after centrifugal is got from rubber plant, first filtered by Alumina Membrane for Microfiltration, mean pore size is 200nm, and transmembrane pressure is 0.5MPa, crossflow velocity is 1m/s, concentration operation is carried out to Jiao Qingfeishui, obtains the concentrated solution of 1L and the micro-filtration penetrating fluid of 9L, then micro-filtration penetrating fluid feeding zirconium white ultra-filtration membrane is filtered, the mean pore size of ultra-filtration membrane is 20nm, transmembrane pressure 0.3MPa, crossflow velocity is 2m/s, obtains ultrafiltrated permeation liquid.
Ultrafiltrated permeation liquid sends into Semi-polarity resin column (column volume 2L) again, flow velocity 1BV/h, after processing, with 50% methanol-eluted fractions (2L), collect elutriant, after suction filtration, underpressure distillation obtains 200g concentrated solution, crystal is collected after static 24h at 0 DEG C, Quebracho alcohol crystals 8g is obtained 3 times, color and luster white, purity 97.1% by 80% recrystallizing methanol.
The sulphuric acid soln adding mass concentration 0.5% in micro-filtration concentrated solution solidifies, and obtains solid drying and becomes the dry glue of 270g, rubber industry wastewater rate 89%.
After transmembrane pressure increase, the amount that result in through the small molecular weight impurity of rete also increases, thus make resin be subject to other impurity impact, the adsorptive capacity of effective constituent is reduced, and the purity of quebrachite also there occurs decline, also makes the yield of rubber there occurs decline in addition.
Embodiment 3
The glue stripping water 10L of fresh natural rubber latex after centrifugal is got from rubber plant, first filtered by Alumina Membrane for Microfiltration, mean pore size is 50nm, transmembrane pressure is 0.1MPa, crossflow velocity is 1m/s, concentration operation is carried out to Jiao Qingfeishui, obtain the concentrated solution of 1L and the micro-filtration penetrating fluid of 9L, by about the pH regulator to 3.0 of micro-filtration penetrating fluid ~ 4.0, send into zirconium white ultra-filtration membrane again to filter, the mean pore size of ultra-filtration membrane is 20nm, transmembrane pressure 0.3MPa, crossflow velocity is 2m/s, obtains ultrafiltrated permeation liquid.
Ultrafiltrated permeation liquid sends into Semi-polarity resin column (column volume 2L) again, flow velocity 1BV/h, after processing, with 50% methanol-eluted fractions (2L), collect elutriant, after suction filtration, underpressure distillation obtains 200g concentrated solution, crystal is collected after static 24h at 0 DEG C, Quebracho alcohol crystals 12g is obtained 3 times, color and luster white, purity 99.1% by 80% recrystallizing methanol.
The sulphuric acid soln adding mass concentration 0.5% in micro-filtration concentrated solution solidifies, and obtains solid drying and becomes the dry glue of 290g, rubber industry wastewater rate 91%.
The present embodiment, compared with embodiment 1, have adjusted the pH of ultrafiltration feed liquid, after protein impurities is reunited, improves the ultrafiltration rejection of albumen, makes the usage quantity of resin reduce 20%, product volume and purity is all improved.
Embodiment 4
The glue stripping water 10L of fresh natural rubber latex after centrifugal is got from rubber plant, first filtered by Alumina Membrane for Microfiltration, mean pore size is 50nm, transmembrane pressure is 0.3MPa, crossflow velocity is 2m/s, concentration operation is carried out to Jiao Qingfeishui, obtain the concentrated solution of 1L and the micro-filtration penetrating fluid of 9L, by about the pH regulator to 3.0 of micro-filtration penetrating fluid ~ 4.0, send into zirconium white ultra-filtration membrane again to filter, the mean pore size of ultra-filtration membrane is 20nm, transmembrane pressure 0.4MPa, crossflow velocity is 3m/s, obtains ultrafiltrated permeation liquid.
Ultrafiltrated permeation liquid sends into Semi-polarity resin column (column volume 2L) again, flow velocity 1BV/h, after processing, with 60% methanol-eluted fractions (2L), collect elutriant, after suction filtration, underpressure distillation obtains 200g concentrated solution, crystal is collected after static 24h at 0 DEG C, Quebracho alcohol crystals 15g is obtained 3 times, color and luster white, purity 99.7% by 80% recrystallizing methanol.
The sulphuric acid soln adding mass concentration 0.5% in micro-filtration concentrated solution solidifies, and obtains solid drying and becomes the dry glue of 310g, rubber industry wastewater rate 93%.
Embodiment 5
The glue stripping water 10L of fresh natural rubber latex after centrifugal is got from rubber plant, first filtered by Alumina Membrane for Microfiltration, mean pore size is 50nm, transmembrane pressure is 0.5MPa, crossflow velocity is 5m/s, concentration operation is carried out to Jiao Qingfeishui, obtain the concentrated solution of 1L and the micro-filtration penetrating fluid of 9L, by about the pH regulator to 3.0 of micro-filtration penetrating fluid ~ 4.0, send into zirconium white ultra-filtration membrane again to filter, the mean pore size of ultra-filtration membrane is 20nm, transmembrane pressure 0.3MPa, crossflow velocity is 2m/s, obtains ultrafiltrated permeation liquid.
Ultrafiltrated permeation liquid sends into Semi-polarity resin column (column volume 2L) again, flow velocity 1BV/h, after processing, with 50% methanol-eluted fractions (2L), collect elutriant, after suction filtration, underpressure distillation obtains 220g concentrated solution, crystal is collected after static 24h at 0 DEG C, Quebracho alcohol crystals 11g is obtained 3 times, color and luster white, purity 98.2% by 80% recrystallizing methanol.
The sulphuric acid soln adding mass concentration 0.5% in micro-filtration concentrated solution solidifies, and obtains solid drying and becomes the dry glue of 280g, rubber industry wastewater rate 91%.
Reference examples
The glue stripping water 10L of fresh natural rubber latex after centrifugal is got from rubber plant, first filtered by Alumina Membrane for Microfiltration, mean pore size is 200nm, transmembrane pressure is 0.1MPa, crossflow velocity is 1m/s, concentration operation is carried out to Jiao Qingfeishui, obtain the concentrated solution of 1L and the micro-filtration penetrating fluid of 9L, micro-filtration penetrating fluid sends into Semi-polarity resin column (column volume 2L) again, flow velocity 1BV/h, after processing, with 50% methanol-eluted fractions (2L), collect elutriant, after suction filtration, underpressure distillation obtains 200g concentrated solution, crystal is collected after static 24h at 0 DEG C, Quebracho alcohol crystals 4g is obtained 3 times by 80% recrystallizing methanol, color and luster white, purity 78.1%.
The sulphuric acid soln adding mass concentration 0.5% in micro-filtration concentrated solution solidifies, and obtains solid drying and becomes the dry glue of 280g, rubber industry wastewater rate 89%.Compared with embodiment 1, owing to not passing through uf processing, the quebrachite yield obtained is low, and purity is bad.
Claims (2)
1. a method for the clear utilization of wastewater resource of glue, is characterized in that, comprise the steps:
The first step, Jiao Qingfeishui to be filtered by microfiltration membrane, obtain micro-filtration concentrated solution and micro-filtration penetrating fluid;
Second step, in micro-filtration concentrated solution, add aqueous sulfuric acid solidify, the solid obtained is carried out drying, the recovery rubber obtained;
3rd step, micro-filtration penetrating fluid to be filtered by ultra-filtration membrane, obtain ultrafiltration and concentration liquid and ultrafiltrated permeation liquid;
4th step, ultrafiltrated permeation liquid is sent into resin carry out purifying, and then obtain elutriant after wash-out, elutriant obtains Quebracho alcohol crystals through crystallization, recrystallization;
In the first step, the transmembrane pressure of microfiltration process is 0.1 ~ 0.5MPa, and crossflow velocity is 1 ~ 5m/s, and the mean pore size of microfiltration membrane is 50 ~ 200nm, and concentration ratio controls make the volume of concentrated solution be 1/10 ~ 1/20 of glue stripping volume of water;
In second step, the mass concentration scope of aqueous sulfuric acid is 0.1 ~ 1%;
In 3rd step, the transmembrane pressure 0.3 ~ 0.5MPa of ultra-filtration process, crossflow velocity is 2 ~ 4m/s, and Average Pore Size of UF Membrane is 10 ~ 50nm;
In 3rd step, will by the pH regulator to 3.0 of feed liquid ~ 4.0 before carrying out ultrafiltration;
In 4th step, resin adopts polar resin;
In 4th step, during purifying, flow velocity is 0.5 ~ 1.5BV/h.
2. the method for the clear utilization of wastewater resource of glue according to claim 1, is characterized in that: described ultra-filtration membrane or the material of microfiltration membrane are the one in aluminum oxide, zirconium white, titanium oxide or stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310723052.7A CN103724459B (en) | 2013-12-25 | 2013-12-25 | The method of the clear utilization of wastewater resource of a kind of glue |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310723052.7A CN103724459B (en) | 2013-12-25 | 2013-12-25 | The method of the clear utilization of wastewater resource of a kind of glue |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103724459A CN103724459A (en) | 2014-04-16 |
| CN103724459B true CN103724459B (en) | 2015-11-18 |
Family
ID=50448779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310723052.7A Active CN103724459B (en) | 2013-12-25 | 2013-12-25 | The method of the clear utilization of wastewater resource of a kind of glue |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103724459B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104693324B (en) * | 2013-12-06 | 2017-07-14 | 中国石油天然气股份有限公司 | A kind of method for adjusting polybutadiene super large grain size latex surface tension |
| CN110204430B (en) * | 2019-06-20 | 2020-04-14 | 海南中橡科技有限公司 | Method for purifying quebrachitol crystal crude product |
| CN113385035A (en) * | 2021-06-09 | 2021-09-14 | 海南天然橡胶产业集团股份有限公司 | Automatic colloidal-clear concentration system and concentration method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381176A (en) * | 2007-09-09 | 2009-03-11 | 李宗辉 | Residual gum recovery method from native rubber processing waste water |
| CN102504049A (en) * | 2011-11-17 | 2012-06-20 | 海南大学 | Method for recovering skim rubber |
| CN103058834A (en) * | 2013-01-09 | 2013-04-24 | 云南省热带作物科学研究所 | Method for extracting quebracho bark alcohol from rubber-processing wastewater of natural rubber |
-
2013
- 2013-12-25 CN CN201310723052.7A patent/CN103724459B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101381176A (en) * | 2007-09-09 | 2009-03-11 | 李宗辉 | Residual gum recovery method from native rubber processing waste water |
| CN102504049A (en) * | 2011-11-17 | 2012-06-20 | 海南大学 | Method for recovering skim rubber |
| CN103058834A (en) * | 2013-01-09 | 2013-04-24 | 云南省热带作物科学研究所 | Method for extracting quebracho bark alcohol from rubber-processing wastewater of natural rubber |
Non-Patent Citations (1)
| Title |
|---|
| 华南热带作物学院.《胶乳的稳定性》.《天然橡胶的性质与加工工艺》.1989, * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103724459A (en) | 2014-04-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101812009B (en) | Novel technique for extracting L-tryptophan from fermentation broth | |
| CN109499369A (en) | A kind of tobacco extract concentration technology | |
| CN101265179B (en) | Technique for purifying lactate | |
| CN103232353A (en) | Method for separating and extracting L-valine from broth with high efficiency | |
| CN103724459B (en) | The method of the clear utilization of wastewater resource of a kind of glue | |
| CN101450091B (en) | Purification method of Panax notoginseng saponins | |
| CN104724729A (en) | Production process of lithium hydroxide | |
| CN104328452B (en) | Producing technology of gluconic acid through bipolar membrane electrodialysis method | |
| CN105274179A (en) | Process for extracting L-isoleucine | |
| CN101492484A (en) | Synthetic circulation production process for guanine nucleoside | |
| CN103012470A (en) | Method for preparing liquid phytic acid from rapeseed dregs | |
| CN106676931B (en) | A kind of fully separating method of black liquid component | |
| CN102018835A (en) | Method for separating effective components in traditional Chinese medicine curculigo orchioides by membrane separation method | |
| CN104496756B (en) | The electrodialysis process of xylitol is prepared with viscose rayon press lye for raw material | |
| CN217119879U (en) | Electrodialysis desalination system of purification glufosinate-ammonium | |
| CN110451529A (en) | A kind of method of purification of sodium chloride for injection | |
| CN218435031U (en) | Metal surface treatment liquid recycling system | |
| CN104152508A (en) | Method for direct extraction of genipin from waste liquid in gardenia yellow pigment production | |
| CN206051730U (en) | A kind of system using various membrane technology recycling treatment kelp processing waste water | |
| CN206051627U (en) | A kind of bean cake recycling treatment system | |
| CN104017037B (en) | A kind of preparation method of the former powder of jinggangmeisu | |
| CN207628222U (en) | Spent solvent system processing system | |
| CN206089712U (en) | Whole blood peptide powder extraction element | |
| CN206051902U (en) | A kind of capreomycin production system based on membrane technology | |
| CN109160663A (en) | A kind of dye industry waste water from dyestuff sub-prime with high salt recycles technique and device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 211806 No. 195 Buyue Road, Pukou Economic Development Zone, Nanjing City, Jiangsu Province Patentee after: Jiangsu Jiuwu High-Tech Co., Ltd. Address before: 211808, No. 9 Hu Dong Road, Pukou Economic Development Zone, Jiangsu, Nanjing Patentee before: Jiangsu Jiuwu High-Tech Co., Ltd. |
|
| CP02 | Change in the address of a patent holder |