CN1482250A - Method for producing acrylamide using film technique microbiological transformation - Google Patents
Method for producing acrylamide using film technique microbiological transformation Download PDFInfo
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- CN1482250A CN1482250A CNA031098061A CN03109806A CN1482250A CN 1482250 A CN1482250 A CN 1482250A CN A031098061 A CNA031098061 A CN A031098061A CN 03109806 A CN03109806 A CN 03109806A CN 1482250 A CN1482250 A CN 1482250A
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- acrylamide
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- thalline
- membrane
- thallus
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- 238000000034 method Methods 0.000 title claims abstract description 42
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 title claims abstract description 24
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 230000009466 transformation Effects 0.000 title claims description 11
- 230000002906 microbiologic effect Effects 0.000 title 1
- 239000007788 liquid Substances 0.000 claims abstract description 53
- 239000012528 membrane Substances 0.000 claims abstract description 45
- 238000005406 washing Methods 0.000 claims abstract description 23
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 238000006703 hydration reaction Methods 0.000 claims abstract description 14
- 239000012535 impurity Substances 0.000 claims abstract description 13
- 230000000813 microbial effect Effects 0.000 claims abstract description 11
- 238000000926 separation method Methods 0.000 claims abstract description 7
- 238000002360 preparation method Methods 0.000 claims abstract description 5
- 238000000746 purification Methods 0.000 claims abstract 2
- FRXSZNDVFUDTIR-UHFFFAOYSA-N 6-methoxy-1,2,3,4-tetrahydroquinoline Chemical compound N1CCCC2=CC(OC)=CC=C21 FRXSZNDVFUDTIR-UHFFFAOYSA-N 0.000 claims description 41
- 238000001471 micro-filtration Methods 0.000 claims description 14
- 238000000108 ultra-filtration Methods 0.000 claims description 13
- 239000012510 hollow fiber Substances 0.000 claims description 11
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 10
- 239000003054 catalyst Substances 0.000 claims description 4
- 238000005516 engineering process Methods 0.000 abstract description 12
- 102000004190 Enzymes Human genes 0.000 abstract description 9
- 108090000790 Enzymes Proteins 0.000 abstract description 9
- 230000036571 hydration Effects 0.000 abstract description 9
- AVSXGQJYEFAQNK-UHFFFAOYSA-N prop-2-enamide;hydrate Chemical compound O.NC(=O)C=C AVSXGQJYEFAQNK-UHFFFAOYSA-N 0.000 abstract 2
- 239000000725 suspension Substances 0.000 abstract 2
- 239000011942 biocatalyst Substances 0.000 abstract 1
- 210000004027 cell Anatomy 0.000 description 17
- 239000008367 deionised water Substances 0.000 description 8
- 229910021641 deionized water Inorganic materials 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000006555 catalytic reaction Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 239000012267 brine Substances 0.000 description 5
- 230000003197 catalytic effect Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000000855 fermentation Methods 0.000 description 4
- 230000004151 fermentation Effects 0.000 description 4
- 210000001822 immobilized cell Anatomy 0.000 description 4
- 102000004169 proteins and genes Human genes 0.000 description 4
- 108090000623 proteins and genes Proteins 0.000 description 4
- 241000894006 Bacteria Species 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 229920002492 poly(sulfone) Polymers 0.000 description 3
- 238000011045 prefiltration Methods 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 230000001580 bacterial effect Effects 0.000 description 2
- 239000000498 cooling water Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000005342 ion exchange Methods 0.000 description 2
- 229920002981 polyvinylidene fluoride Polymers 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 240000004808 Saccharomyces cerevisiae Species 0.000 description 1
- 229920006172 Tetrafluoroethylene propylene Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 229920000615 alginic acid Polymers 0.000 description 1
- 235000010443 alginic acid Nutrition 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000012295 chemical reaction liquid Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- PXEDJBXQKAGXNJ-QTNFYWBSSA-L disodium L-glutamate Chemical compound [Na+].[Na+].[O-]C(=O)[C@@H](N)CCC([O-])=O PXEDJBXQKAGXNJ-QTNFYWBSSA-L 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 230000002779 inactivation Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 235000013923 monosodium glutamate Nutrition 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000036647 reaction Effects 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 229940073490 sodium glutamate Drugs 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 238000011426 transformation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The microbial conversion process of producing acrylamide by applying membrane technology includes the following steps: microbial thallus culture, preparation of heavy thallus suspension, acrylonitile hydration to produce acrylamide with free thallus as biocatalyst, and separating reaction obtained acrylamide hydrate liquid. The present invention features the microfiltering film purification and washing of thallus in fermented liquid to prepare heavy thallus suspension and the ultrafiltering film separation of acrylamide hydrate liquid from biological impurity. The production process of acrylamide has high production efficiency, high thallus utilization, low biological impurity content in hydrate product, and high quality and purity of acrylamide product.
Description
Technical field
The present invention relates to membrane technique and produce application method in the acrylamide, mainly comprise the application in free cell catalytic hydration reaction process of the application of microfiltration membrane in the free cell washing process, ultra-filtration membrane and the technological process of production of the whole acrylamide microbial transformation formed of this two portions technology in microbial transformation.Belong to technical field of biochemical industry.
Background technology
Microbe transformation method is the method for present new generation of industrial production acrylamide, and the technology that is adopted mainly is biological catalyst, adopts batch formula reactive mode to carry out with the immobilized cell of alginates.Its technical process be divided into fermentation, granulation, hydration, refining, concentrate, crystallization, centrifugal, dry 8 parts.In its hydration workshop section, immobilization particle separates by screen cloth with aqua liquid.The subject matter that exists in the technology is at present: the process more complicated of cell fixation has also increased facility investment and production cost; The enzymic activity of cell reduces much after the immobilization, has influenced the utilization that enzyme is lived; Entrapment media can break in catalytic process, produces organic and inorganic impurity, influences the quality of reaction solution; Therefore, hydration reaction liquid need carry out that multistep is refining just to reach specification of quality, makes the burden of process for refining heavier or the like.For this reason, production technique needs further to improve, and production efficiency and thalline utilization ratio need further to improve.In addition, the free cell that the production technique that has also begins directly to adopt the thalline fermented liquid is as biological catalyst, and the catalytic hydration process is passed through supercentrifuge separation of acrylamide aqua liquid and free cell after the hydration reaction.This technological process need be used supercentrifuge, and facility investment is big, maintenance of equipment complexity, energy consumption height, and also the biological impurities content in the gained acrylamide product is also higher.
Summary of the invention
The purpose of this invention is to provide the method that acrylamide is produced in a kind of microbial transformation of using membrane technique.Present method can be stated as: the fermentation culture of microorganism, the fermented liquid that obtains obtains the resuspended liquid of thalline through centrifugation and microfiltration membrane washing, purifying, the resuspended liquid of the thalline of gained carries out the hydration reaction that the hydration of catalyzing propone nitrile generates acrylamide as biological catalyst, and the mixed system of the reaction of gained obtains highly purified acrylamide aqua liquid through the separation of ultra-filtration membrane.
The application of microfiltration membrane mainly is for the thalline in the purifying fermentation liquor.Since contain residual fermention medium in the fermenation raw liquid, a large amount of biological impurities and cytopigment etc., and these impurity can exert an influence to free cell hydro-combination process and sepn process, also can influence the quality of aqua liquid.Can be when holding back thalline by microfiltration membrane, most of impurity separation in the system is removed, and through behind the repeatedly circulation cleaning of deionized water, fermenation raw liquid can become the resuspended liquid of more purified thalline, biological impurities (foreign protein) is reduced to below the 10ppm, and the bacterial enzyme activity remains unchanged substantially.
Use the coupling of ultra-filtration membrane and biological respinse system, then can realize the free cell catalytic reaction process.Ultra-filtration membrane by certain molecular weight cut-off, when holding back thalline and separating aqua liquid, also can be trapped in some biological impurities that cell produces in the hydro-combination process, not only specific conductivity is low to make the product-aqua liquid that obtains, colourity is low, and biological impurities content is low.
The micro-filtration membrane module involved in the present invention and the form of hyperfiltration membrane assembly comprise hollow-fibre membrane, rolled film, flat sheet membrane and tubular membrane device.Related mould material comprises organic polymer materials such as polysulfones, polyvinylidene difluoride (PVDF), tetrafluoroethylene and polypropylene.
By Application of membrane, original technological process is improved in the following aspects: (1) has omitted the step of cell fixation, has simplified production unit and technology; (2) substitute immobilized cell with free cell and carry out catalytic hydration, improved reaction efficiency and thalline utilization ratio; (3) reduced the colourity of product and the content of biological impurities by the membrane sepn process, improved the quality of product aqua liquid, quality product is reached advanced world standards; (4) when reducing facility investment, improved throughput, production efficiency and reduced labour intensity; (5) simplify ion-exchange step in the subsequent reactions liquid treating process, reduced the load of ion exchange treatment, improved production efficiency; (6) on free cell reaction and membrane separation technique coupled basis, can further develop multistage continuous process process, to replace existing batch of formula operating procedure.
Description of drawings
Fig. 1 produces the industrial applications device schema of acrylamide for the microbial transformation of using membrane technique.
Embodiment
Embodiment one
The industrialization flow process of using hollow fiber microfiltration membrane and hollow fiber ultrafiltration membrane comprises: in the fermenation raw liquid membrane sepn of thalline purify part and with membrane sepn coupled free cell catalytic hydration reactive moieties.Thalline purify part mainly by: thalline flow container, washing liquid tank, prefilter, hollow fiber microfiltration membrane assembly and impeller pump are formed.The hydration part mainly is made up of free cell catalytic reaction kettle, prefilter, polysulfone hollow fiber ultrafiltration membrane system, impeller pump and washing liquid tank etc.The industrial experiment flow process as shown in Figure 1, major equipment is as shown in table 1 in the flow process.
The preparation of the resuspended liquid of thalline:
| Numbering | Title | Device parameter | |
| 1 | | 3m | 3 |
| 2 | The thalline washing tank | 2m 3The band cooling jacket | |
| 3 | The hollow fiber microfiltration membrane assembly | 4m 2* 10, hold back aperture 0.1 μ m, working pressure is less than 0.1MPa | |
| 4 | The microfiltration membrane | 1m | 3 |
| 5 | The resuspended liquid storage tank of thalline | The band cooling jacket, wet thallus content about 10% | |
| 6 | The vinyl cyanide test tank | 2m 3, the band gauge line | |
| 7 | The deionized water test tank | 6m 3, the band gauge line | |
| 8 | The free cell reactor | 6m 3, band stirring rake, cooling jacket | |
| 9 | Polysulfone hollow fiber ultrafiltration membrane system | 4m
2* 40, molecular weight cut-off 10000-50000, working pressure is less than 0.1 | |
| 10 | The ultra-filtration membrane purge tank | 2m 3 | |
| 11 | The outlet of filtration aqua liquid | Φ 50, and filtration velocity reaches 5-6m
3/ | |
| 12 | The fermented liquid inlet tube | Φ50 | |
| 13 | The thalline washing liquor exhaust pipe | Φ50 | |
| 14 | The deionized water inlet tube | Φ75 | |
| 15 | The vinyl cyanide inlet tube | Φ25 | |
| 16 | The cooling water inlet pipe | Φ 50, | |
| 17 | Cooling water outlet pipe | Φ 50, cool brine | |
| 18 | Prefilter | 200 | |
| 19 | Impeller pump 1 | 1.5kw, flow 12.5m
3, | |
| 20 | | 5.5kw, flow 50m 3, lift 20m |
(1) thalline is cultivated in the 3m3 fermentor tank under 28 ℃, and the main component of substratum is: glucose 20g/L; Yeast soaks powder 5g/L; Urea 7.5g/L; Sodium Glutamate 1g/L; K
2HPO
40.5g/L; KH
2PO
40.5g/L; MgSO
47H
2O0.5g/L; Inductor 60ppm.Regulating the pH value is 7.5, cultivates after 56 hours, obtains about 1.2 tons of the resuspended liquid of thalline altogether, and wet thallus content is 120g/L, and enzyme activity reaches 2669U/mL.
(2) with pump the resuspended liquid of thalline is delivered to the thalline washing tank, feed refrigerated brine in the cooling jacket of washing tank, make the temperature of bacterium liquid in the washing process be controlled at 4-10 ℃.
(3) start recycle pump, rotating speed 2900rpm, flow are 12.5m
3/ h filters the resuspended liquid of thalline and concentration process by hollow fiber microfiltration membrane, and filtered liquid enters Sewage treatment systems, and the filtered liquid flow is 1.5-2.3m3/h.The variation of protein concentration and colourity in the analysis and filter liquid, and thalline is held back situation.
(4) when the concentration ratio of circulating system reaches 5, stop recycle pump and filtration procedure.In the thalline washing tank, add deionized water,, restart recycle pump, proceed filtration, washing process to 2.0 tons.The filtered liquid flow is 1.7-3.0m
3/ h.Variation of protein concentration and colourity and thalline are held back situation in the analysis and filter liquid.After concentration ratio reaches 5, dilute again and refilter, wash once.
(5), finished the washing process of bacterium liquid through above multiple times of filtration and washing.Consider film scavenging period and non-cutting time, the work efficiency of whole microfiltration membrane washing thalline be about 0.4 ton of original fermented liquid/hour.
(6) finish washing after, the wet thallus concentration in the resuspended liquid of thalline reaches 120g/L, enzyme activity reaches 1100U/mL, and compares before the washing, enzyme is lived and not to be descended.Other every washing indexs, as shown in the table.The resuspended liquid of thalline is with the resuspended liquid storage tank of thalline that is pumped to hydration workshop section, and with cool brine controlled temperature to 4 ℃.
Technical indicator before and after table 2 filtering fermentation liquor, the washing
The preparation of acrylamide aqua liquid:
| Project | Enzyme U/mL alive | Specific conductivity μ s/cm | ????pH | Colourity | Albumen ppm |
| Fermenation raw liquid | ??2669 | ??＞500 | ????9.0 | ????＞100 | ??600 |
| Bacterium liquid after the washing | ??2579 | ??130 | ????8.7 | ????10 | ??5 |
(1) preparation of initial reaction system.At 6m
3Add the resuspended liquid of 250kg thalline in the reactor, and add the 4750kg deionized water, the content that initial system is diluted to wet thallus is 0.5%.In cooling jacket, feed refrigerated brine, the reaction system initial temperature is controlled to 15-16 ℃.
(2) unstable state reaction process.Begin stream and add vinyl cyanide, regulate the vinyl cyanide flow to 0.5-1.0m
3About/h, flow acceleration is progressively turned down from high to low.Sampling in per 20 minutes with acrylamide and acrylonitrile concentration in the gas Chromatographic Determination system, not occur too high acrylonitrile concentration (acrylonitrile concentration is less than 2-3%) in the guarantee system, prevents the sudden inactivation of thalline.System temperature maintains about 20 ℃.Approximately after the 120min, when the acrylamide concentration of measuring reaches 25% (W/V%), acrylonitrile concentration is during less than 0.01% (W/V%), and first unstable state reaction finishes.
(3) recycle pump of startup hollow fiber ultrafiltration membrane separation system, specified speed 2900rpm, rated flow is 50m
3/ h.The membrane sepn process of beginning aqua liquid, the filtered liquid flow is 5-6m3/h.Protein concentration in the analysis and filter liquid, quality index such as colourity and specific conductivity.Approximately through the membrane sepn process of 60min, when concentration ratio reached 10 left and right sides, stopper film separated.
(4) with the deionized water backwash, just wash hollow fiber ultrafiltration membrane, with thalline refunds reactor.Add deionized water, thalline in the reactor is diluted to 0.5%, and controlled temperature enters second batch reaction and sepn process to 15-16 ℃ once more.
(5) owing to the active reduction of bacterial enzyme, the speed of a back catalyzed reaction is once slower than preceding, the last vice-minister of used time ratio.Approximately can carry out four batches of above catalytic reaction processes, the required time increase (greater than three hours) greatly until reaction, the utility value that enzyme is lived not quite the time, can consider to use instead new catalyzer.Promptly the 4th batch reaction with separate end after, with certain deionized water wash residue thalline concentrated solution, washings reclaims.Thalline is handled as waste residue after washing.
Under 20 ℃, carried out four batches of unstable state reactions altogether, the reaction times adds and was total up to disengaging time and non-cutting time 15.9 hours.In the entire reaction sepn process, the transformation efficiency of vinyl cyanide is 99.9%, and the thalline utilization ratio is 196.85gAM/gcell, and production efficiency is 12.38gAM/gcell.hr.Compare with existing fixed cell catalysis technology, on operating time and the essentially identical basis of transformation efficiency, the thalline utilization ratio of the free cell biological reaction process of application hollow-fibre membrane and production efficiency are all than immobilized cell catalyzed reaction technology height.Production efficiency has improved 137%, and the thalline utilization ratio has improved 76%.
The mass parameter of the product liquid that table 3 technology of the present invention and immobilization technology obtain relatively
| Technological process | Colourity | Conductivity variations μ s/cm | Other impurity in the aqua liquid | The product gel | Protein content ppm |
| Immobilized cell technology | ??20-30 | ?＞1000 | Many | Translucent | ????＞10 |
| Technology of the present invention | ??10-15 | ?500＜ | Few | Transparent | ????＜5 |
Claims (3)
1. method that acrylamide is produced in the microbial transformation of using membrane technique, contain following operation: microbial thallus culture, the preparation of the resuspended liquid of thalline, and carry out the acrylonitrile hydration reaction with free thalline as biological catalyst and produce acrylamide, the acrylamide aqua liquid of separating reaction gained, it is characterized in that coming the thalline in the purification and washing fermented liquid to prepare the resuspended liquid of thalline, come separation of acrylamide aqua liquid and biological impurities with ultra-filtration membrane with microfiltration membrane.
2. the method for producing acrylamide according to the said microbial transformation of claim 1 is characterized in that said microfiltration membrane is a hollow fiber microfiltration membrane.
3. the method for producing acrylamide according to the said microbial transformation of claim 1 is characterized in that said ultra-filtration membrane is a hollow fiber ultrafiltration membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03109806 CN1238514C (en) | 2003-04-11 | 2003-04-11 | Method for producing acrylamide using film technique microbiological transformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03109806 CN1238514C (en) | 2003-04-11 | 2003-04-11 | Method for producing acrylamide using film technique microbiological transformation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1482250A true CN1482250A (en) | 2004-03-17 |
| CN1238514C CN1238514C (en) | 2006-01-25 |
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ID=34152350
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03109806 Expired - Fee Related CN1238514C (en) | 2003-04-11 | 2003-04-11 | Method for producing acrylamide using film technique microbiological transformation |
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| Country | Link |
|---|---|
| CN (1) | CN1238514C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212157A (en) * | 2010-08-20 | 2011-10-12 | 江苏南天农科化工有限公司 | Preparation process of aqueous solution of acrylamide containing no polymerization inhibitor |
| CN102994582A (en) * | 2011-09-19 | 2013-03-27 | 朱少锋 | Method for preparing acrylamide aqueous solution by adopting inner coil cooling method |
| CN104059948A (en) * | 2014-05-09 | 2014-09-24 | 清华大学 | Method of synthesizing acrylamide by using acrylonitrile hydratase |
| CN105420302A (en) * | 2015-12-15 | 2016-03-23 | 安徽巨成精细化工有限公司 | Method and device for continuously preparing acrylamide with microbiological method |
| CN112266866A (en) * | 2020-10-27 | 2021-01-26 | 广东宝莫生物化工有限公司 | Acrylamide production system |
-
2003
- 2003-04-11 CN CN 03109806 patent/CN1238514C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102212157A (en) * | 2010-08-20 | 2011-10-12 | 江苏南天农科化工有限公司 | Preparation process of aqueous solution of acrylamide containing no polymerization inhibitor |
| CN102212157B (en) * | 2010-08-20 | 2013-03-27 | 江苏南天农科化工有限公司 | Preparation process of aqueous solution of acrylamide containing no polymerization inhibitor |
| CN102994582A (en) * | 2011-09-19 | 2013-03-27 | 朱少锋 | Method for preparing acrylamide aqueous solution by adopting inner coil cooling method |
| CN102994582B (en) * | 2011-09-19 | 2015-09-09 | 朱少锋 | Inner coil pipe method of cooling prepares the method for acrylamide solution |
| CN104059948A (en) * | 2014-05-09 | 2014-09-24 | 清华大学 | Method of synthesizing acrylamide by using acrylonitrile hydratase |
| CN105420302A (en) * | 2015-12-15 | 2016-03-23 | 安徽巨成精细化工有限公司 | Method and device for continuously preparing acrylamide with microbiological method |
| CN105420302B (en) * | 2015-12-15 | 2019-04-16 | 安徽巨成精细化工有限公司 | A kind of serialization microbial method prepares the method and device of acrylamide |
| CN112266866A (en) * | 2020-10-27 | 2021-01-26 | 广东宝莫生物化工有限公司 | Acrylamide production system |
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| CN1238514C (en) | 2006-01-25 |
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