CN1699992A - Chloroethylene polymerization kinetics real time tracing and detecting apparatus and method - Google Patents
Chloroethylene polymerization kinetics real time tracing and detecting apparatus and method Download PDFInfo
- Publication number
- CN1699992A CN1699992A CN 200510025756 CN200510025756A CN1699992A CN 1699992 A CN1699992 A CN 1699992A CN 200510025756 CN200510025756 CN 200510025756 CN 200510025756 A CN200510025756 A CN 200510025756A CN 1699992 A CN1699992 A CN 1699992A
- Authority
- CN
- China
- Prior art keywords
- gas
- monomer
- butane
- chromatograph
- conversion ratio
- 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.)
- Pending
Links
Images
Landscapes
- Polymerisation Methods In General (AREA)
Abstract
The invention discloses a measuring method and apparatus for chloroethylene polymerization kinetics real-time trace. The method and apparatus of the invention can do real-time trace to chloroethylene polymerization kinetics, sample, chromatographic detect, software point fetch and data process and so on. It can make the curve of chloroethylene polymerization kinetics conversion rate-heat release---time, and master reaction ratio and the condition of heat release during chloroethylene polymerization kinetics process, and conduct initiator's assortment choice and mutually uniformity.
Description
Technical field
The present invention relates to a kind of chloroethylene polymerization process conversion ratio, the isoparametric real time technique for tracking of thermal discharge, can study initiating agent to the dynamic (dynamical) shadow of vinyl chloride to rule, can instruct choose reasonable initiating agent kind and compatibility, make polymerization rate (rate of heat release) be tending towards evenly giving full play to the heat-transfer capability of polymeric kettle.
Background technology
The chloroethylene polymerization reaction kinetics has reflected the essential characteristic of chloroethylene polymerization reaction, and the basic data of research chloroethylene polymerization kinetics is the chloroethylene polymerization conversion ratio.So far, can be used for kinetics of polymerization reaction measures the method for conversion rate of vinyl chloride gravimetric method, dilatometer method, densimetry, calorimetry and vapor-phase chromatography etc. is arranged.
Though gravimetry has higher measuring accuracy, there is serious lag in obvious defects when being to measure;
The advantage of densimetry is that measuring accuracy is high and response is fast, but need directly contact with reaction system when using, and is very disadvantageous for the system that easily causes bonding therefore, damages measurement mechanism easily, influences measuring accuracy;
Calorimetry is that the heat that produces by assaying reaction is to determine reaction kinetics, not only have higher measuring accuracy and fast response speed, and have irrelevant characteristics of measuring method and reactive mode of operation, but influencing calorimetry technology key in application is the low precision difficulty that is difficult to solve the accurate problems of measurement of thermal losses and can't breaks through the thermometric components and parts.The dilatometer rule is difficult to use in the high pressure place as the chloroethylene polymerization system.
Utilization vapor-phase chromatography research vinyl chloride kinetic determination can high precision can be used to measure to fast-response conversion rate of vinyl chloride again, so as to carrying out chloroethylene polymerization kinetics research.The A.E.Hamielec of Mc Master institute and Xie use gas chromatographic technique chlorine detection conversion of ethylene research chloroethylene polymerization kinetics, and set up chloroethylene polymerization kinetics model---Hamielec-Xie model, their test confirms to adopt this commercial measurement to have good precision, but set up the dynamic real-time detection system that is connected with computing machine as yet, be only limited to the off-line analysis calculating of the on-line chromatograph determination data being carried out reaction kinetics.
Summary of the invention
The technical issues that need to address of the present invention are to disclose a kind of chloroethylene polymerization kinetics real time tracing and detecting apparatus and method, to overcome the defective that prior art exists, satisfy the needs of relevant area research.
Still design of the present invention is such:
In the suspension polymerization of VC reaction, vinyl chloride monomer is present in respectively in water, gas, the oily three-phase, and the vinyl chloride in the three-phase is in equilibrium state.Along with polyreaction is constantly carried out, the vinyl chloride monomer drop of oil phase constantly consumes the generation polymkeric substance; The polymeric system volumetric contraction that generates causes vinyl chloride monomer to be volatilized to gas phase by liquid phase.When the liquid monomer disappearance, the monomer of gas phase shifts to polymkeric substance, and equilibrium state is destroyed simultaneously, and pressure descends, and at this moment continues to react main gas phase, water and the vinyl chloride monomer of swelling in particle of consuming, until the limit conversion ratio that reaches polymerization.
This characteristics according to above chloroethylene polymerization, the present invention selects to add butane as tracer agent in reaction system, because butane is in gas phase, the vinyl chloride monomer phase, certain solubleness is all arranged in water and the polymer phase, do not participate in polyreaction again, therefore along with the carrying out of polyreaction, monomer phase and polymer phase change in the system, the amount of butane that is dissolved in monomer and polymkeric substance and water is also changed, thereby the distribution condition of butane in polymeric kettle changed, therefore can adopt the gas chromatograph of chloroethylene polymerization kinetics real-time detecting system to detect the variation of amount of butane in gas phase in real time, and then the generation that obtains the polymerization-filling thing transforms situation, can try to achieve the chloroethylene polymerization conversion ratio.
The inventive system comprises:
Pressure unit that one end is connected with reactor respectively and temperature transmitter;
The reduction valve that has screen pack that one end is connected with reactor;
A chromatograph that is connected with the reduction valve that has screen pack by pipeline, described chromatograph is connected by pipeline with the carrier gas source of the gas;
One respectively with the other end and the A/D converter that chromatographic output terminal is connected of pressure unit, temperature transmitter, be used for pressure unit, temperature transmitter and chromatographic chromatogram output signal are converted to digital signal;
A microprocessor that is connected with A/D converter is used to handle the signal from A/D converter, realizes detecting in real time data computing and output;
Method of the present invention comprises the steps:
(1) the tracer agent butane is added reactor, the consumption of butane is about the 0.1-5% of vinyl chloride monomer weight, preferably 0.5-2.0%;
(2) open the reduction valve that has screen pack, the gas sample of polymeric kettle is input to gas chromatograph continuously by pipeline, opened six logical injectors in the chromatography at interval in 3-5 minute, make gas sample and (carrier gas) together enter gas chromatograph, after separating column separates, detect each component by conductance cell;
The signal that the conductance cell of the signal of the signal of pressure unit, temperature transmitter and gas chromatograph is detected is sent into A/D converter simultaneously, digital signal input microprocessor after will changing then, adopt mathematical modulo pattern (1) to calculate the real-time conversion ratio of polyreaction, and realize man-machine actual conversation by the microprocessor interface;
Helium is selected in said carrier gas for use;
The tracer agent butane in polymerization process in the gas phase variation of content be not only just can characterize by simple parameters of thermodynamic equilibrium, could set up its equilibrium relation after must and calculating in theoretical derivation closely, through derivation, following relational expression:
Formula (1)
In the formula:
X---t moment reaction conversion ratio;
A---the peak area of t moment butane and the ratio of the peak area of 0 moment butane;
P
0, P
t---0 moment, t still are constantly pressed;
M
b---the butane molecular weight;
M
m---the quality that monomer is initial;
M
0---monomer is in the quality of polymer phase;
K
Bm, K
Bp, K
Bw---the solubility coefficient of butane in monomer, polymer phase, in the water;
D
b, D
p---the density of butane and polymkeric substance;
q
0——0.5～5.0；
q
i——0.5～5.0；
q
x——0.5～5.0；
M
1i＝M
0-M
g-M
w
M
10＝M
0-M
g0-M
w0
M
G0---the initial mass of monomer in gas phase;
M
W0---monomer is in the initial mass of aqueous phase;
M
g---t is the quality of monomer in gas phase constantly;
M
w---t moment monomer is in the quality of aqueous phase;
M
Gx---monomer is in the gas phase quality of shutting out during the X conversion ratio;
The relevant physicochemical data in the formula (1) such as the density of butane molecular weight, butane and polymkeric substance, the alkane solubility coefficient in monomer, polymer phase, in the water etc. all can adopt conventional method to calculate, or consults relevant chemical handbook;
Formula (1) is gas chromatography and detects dynamics mathematical model in real time, as can be seen, need only obtain the ratio A of butane at t moment peak area and 0 moment peak area, just can correspondence go out t polymerisation conversion X constantly, need not measure the instrument constant K of chromatogram
b(gas chromatography peak response Y
b=K
bA
b), consumption B that also needn't the accurate measurement butane.
Distribution draws according to the polymeric kettle material balance because the derivation of polymerization kinetics mathematical model of the present invention is calculated, do not have special at certain specific polymerization, therefore its scope of application is very wide, only need relevant thermodynamic parameter change, for being the chloroethylene polymerization of disperse phase, comprise that suspension, emulsion, micro-emulsion polymerization all are suitable for water.
Because except that on-test intensification and end step-down, polymerization temperature and pressure are to be in gradual change substantially, can not undergo mutation under the normal condition, thereby adopt the computer system clock to interrupt collecting temperature, pressure data, be that every 45-65ms sends the one query request to serial port, write down a secondary data, in a unit interval, ask average.
The present invention also is provided with real-time contrast, calibration function in the program of computer software data acquisition.Write down the mean value that preceding 5 secondary data change, more current gather data and the absolute value of difference last time whether surpass 3 times of mean value, above then thinking that this secondary data is invalid, guess this value by preceding 5 secondary data.In order further to eliminate disturbing effect, system software also designs the technology that has adopted the slip data window, and chromatographic data is taked the mean value recording mode of transient data and preceding 4 secondary data, and test figure is more become smoothly, and test findings is more reliable.
Utilize apparatus and method of the present invention, chloroethylene polymerization is carried out real-time follow-up to be detected, sampling, chromatogram detect, software is got processes such as point, data processing, can make chloroethylene polymerization conversion ratio-heat release-time curve, fully grasp reaction rate and heat release situation in the chloroethylene polymerization process, instruct the kind of initiating agent to select and mutual compatibility effectively.The real-time chlorine detection ethylene polymerization dynamics of appliance computer of the present invention has improved speed and precision that data acquisition and information processing are calculated, has realized the online in real time of polymerization process is followed the tracks of and prosecution, increases work efficiency.
Description of drawings
Fig. 1 is a structure drawing of device.
Embodiment
Referring to Fig. 1, the inventive system comprises:
Pressure unit 2 that one end is connected with reactor 1 respectively and temperature transmitter 3;
The reduction valve that has screen pack 6 that one end is connected with reactor 1;
A chromatograph 4 that is connected with the reduction valve 6 that has screen pack by pipeline, described chromatograph 4 is connected by pipeline with the carrier gas source of the gas;
An A/D converter 9 that is connected with the output terminal of the other end of pressure unit 2, temperature transmitter 3 and chromatograph 4 respectively is used for the chromatogram output signal of pressure unit 2, temperature transmitter 3 and chromatograph 4 is converted to digital signal;
A microprocessor 10 that is connected with A/D converter 9 is used to handle the signal from A/D converter 9, realizes detecting in real time data computing and output;
Said chromatograph 4 can adopt conventional chromatograph, and the model of island proper Tianjin company production is the chromatograph of GC-14B as day;
Said A/D converter 9 can adopt conventional A/D converter, is the A/D converter of PCL-812 as model.
According to the preferred scheme of the present invention, a pressure maintaining valve is set behind the reduction valve 6 that has screen pack again, send into chromatograph 4 by the gas sample that pressure maintaining valve will be gathered, make the sample introduction steady air current, reduced gas production sample stream overall control difficulty, avoided the condensation of vinyl chloride, butane etc. in the air-flow, thereby the error that causes of not only taking a sample reduces greatly, and can ignore the influence of sampling polymerization system VCM amount.As to get gas sample flow velocity be 20ml/min, and polymerization time is in 6hr, and then to cause the VCM loss amount be 20g in sampling, if in monomer initial charge amount 2000g, then error is 1%, can ignore.
Simultaneously, the suspension polymerization of VC temperature is generally between 51 ℃～62 ℃, and corresponding still internal pressure is between 0.8～1.0Mpa, and direct sample is transported to gas chromatograph and can brings a lot of difficulties by automatic six-way valve sample introduction in the higher polymeric kettle of pressure.On the one hand, because still internal pressure height, the institute's gas sample of getting stream flow velocity is too fast, difficult stable control gas sample flow velocity and total amount; On the other hand, sampling system pressure is higher, and vinyl chloride (VC), the butane elevation of boiling point (when the 0.95Mpa pressure, boiling point is elevated to 75 ℃ from-13.9 ℃ as vinyl chloride) if insulation easily causes condensation of gas such as vinyl chloride inadequately, have a strong impact on the sampling accuracy.The present invention carries out effectively insulation of whole process to the sampling pipeline, employing ribbon heater insulation, holding temperature is 80-100 ℃, guarantee in the sampling system gas sample gas sample such as VCM evenly, not condensation, the chromatogram sampling can be represented certain interior gaseous component of still constantly really, and the sampling process accuracy and confidence is significantly improved.
Chromatographic data of the present invention is handled then more complicated.In chromatogram and Computer signal transfer process, because transmission signals itself is more weak, there is interference wave again, so between chromatogram 4 and microprocessor 10, be provided with amplifilter, make the not detecting signal of original vinyl chloride 7～8mV, butane 0.1mV amplify 800-1500 doubly, not only clear the detecting of signal energy makes signal to noise ratio (S/N ratio) increase simultaneously, and noise jamming has also reduced.
Embodiment
Embodiment 1
Start gas chromatograph, integraph by rules, regulate the chromatographic run condition, be in dormant state; Take by weighing reagent and additive in polymerization such as desalted water, spreading agent, initiating agent and add the 10L polymeric kettle successively; Use the nitrogen purging pressure testing, vacuumize deoxidation, under the polymeric kettle vacuum state, in still, add the about 20g of tracer agent butane; Add 2000gVCM, cold stirring 20min, stirring rate 500r.p.m.
Open the stopple coupon attemperator, keep 90 ℃; Open nitrogen cylinder valve, adjustable pressure reducing valve, open amplifier signal and amplify 1000 times, start-up system software, debugging baseline; Be warming up to 51.3 ℃ of predetermined polymerization temperatures, bring into use the dynamics calculation machine real-time detecting system that has started, sample gas is stablized the sampling of laggard circumstances in which people get things ready for a trip spectrum, parameters such as the polymerization time of online detection record chloroethylene polymerization, temperature, pressure, conversion ratio, and every 4min takes a sample automatically and detects once.
Pressure drop is got last sample during to predetermined pressure, data archiving, and band extrudes material; Close chromatogram, print experimental data and empirical curve, data software processes, and the final conversion ratio comparison (seeing Table 1) that records of the final conversion ratio that real-time detecting system is detected and gravimetric method.
The final conversion ratio of final conversion ratio of table 1 real-time detecting system and gravimetric method relatively
| Lot number | The final conversion ratio of real-time detecting system (%) | The final conversion ratio of gravimetric method (%) | Final conversion ratio absolute error (%) |
| ??11-01 ??11-02 ??11-03 | ??83.9 ??84.7 ??84.6 | ??85.4 ??87.3 ??85.7 | ??1.5 ??2.6 ??1.1 |
| Mean absolute error (%) | ??1.73 | ||
Utilize mean absolute error between the final conversion ratio of final conversion ratio that chloroethylene polymerization kinetics computer real-time detection system detects in real time and gravimetric method detection less than 2.0%.
Embodiment 2:
Chemical substance signals such as the vinyl chloride that amplifilter is exported chromatogram between chromatogram, computing machine intercommunicating device, butane amplify 100 times, and other is operated with embodiment 1, the results are shown in Table 2.
The final conversion ratio of final conversion ratio of table 2 real-time detecting system and gravimetric method relatively
| Lot number | The final conversion ratio of real-time detecting system (%) | The final conversion ratio of gravimetric method (%) | Final conversion ratio absolute error (%) |
| ??11-04 ??11-05 ??11-06 | ??81.9 ??78.7 ??90.6 | ??85.5 ??87.0 ??86.7 | ??3.6 ??8.3 ??3.9 |
| Mean absolute error (%) | ??5.27 | ||
Utilize mean absolute error between the final conversion ratio of final conversion ratio that chloroethylene polymerization kinetics computer real-time detection system detects in real time and gravimetric method detection greater than 5%.
Embodiment 3:
Add 5g butane tracer agent during polymerization, other is operated with embodiment 1, the results are shown in Table 3.
The final conversion ratio of final conversion ratio of table 3 real-time detecting system and gravimetric method relatively
| Lot number | The final conversion ratio of real-time detecting system (%) | The final conversion ratio of gravimetric method (%) | Final conversion ratio absolute error (%) |
| ??11-07 ??11-08 ??11-09 | ??80.9 ??82.7 ??89.2 | ??87.5 ??86.0 ??84.7 | ??6.6 ??3.3 ??4.5 |
| Mean absolute error (%) | ??4.80 | ||
Utilize mean absolute error between the final conversion ratio of final conversion ratio that chloroethylene polymerization kinetics computer real-time detection system detects in real time and gravimetric method detection greater than 4%.
Comparative Examples 1:
Add 20g methane during polymerization and make tracer agent, other is operated with embodiment 1, the results are shown in Table 4.
The final conversion ratio of final conversion ratio of table 4 real-time detecting system and gravimetric method relatively
| Lot number | The final conversion ratio of real-time detecting system (%) | The final conversion ratio of gravimetric method (%) | Final conversion ratio absolute error (%) |
| ??11-10 ??11-11 ??11-12 | ??64.0 ??98.3 ??35.8 | ??85.5 ??88.0 ??84.6 | ??21.5 ??10.3 ??48.8 |
| Mean absolute error (%) | ??26.87 | ||
Utilize mean absolute error between the final conversion ratio of final conversion ratio that chloroethylene polymerization kinetics computer real-time detection system detects in real time and gravimetric method detection greater than 25%, net result has no rule and precision can be sayed.
Comparative Examples 2:
The sampling system gas sampled directly detects by entering chromatogram behind the pressure maintaining valve, and other is operated with embodiment 1, the results are shown in Table 5.
The final conversion ratio of final conversion ratio of table 5 real-time detecting system and gravimetric method relatively
| Lot number | The final conversion ratio of real-time detecting system (%) | The final conversion ratio of gravimetric method (%) | Final conversion ratio absolute error (%) |
| ??11-13 ??11-14 ??11-15 | ??74.3 ??89.3 ??80.7 | ??85.4 ??83.0 ??86.6 | ??11.1 ??6.3 ??5.9 |
| Mean absolute error (%) | ??7.77 | ||
Utilize mean absolute error between the final conversion ratio of final conversion ratio that chloroethylene polymerization kinetics computer real-time detection system detects in real time and gravimetric method detection greater than 7%, precision is relatively poor.
Comparative Examples 3:
To the sampling pipeline, comprise that reduction valve, flow stabilizing valve and six-way valve etc. all are not incubated during sampling, directly sampling enters chromatogram and detects in the still, and other is operated with embodiment 1, the results are shown in Table 6.
The final conversion ratio of final conversion ratio of table 6 real-time detecting system and gravimetric method relatively
| Lot number | The final conversion ratio of real-time detecting system (%) | The final conversion ratio of gravimetric method (%) | Final conversion ratio absolute error (%) |
| ??11-16 ??11-17 ??11-18 | ??82.3 ??83.3 ??81.9 | ??87.4 ??85.0 ??88.6 | ??5.1 ??1.7 ??6.7 |
| Mean absolute error (%) | ??4.5 | ||
Utilize mean absolute error between the final conversion ratio of final conversion ratio that chloroethylene polymerization kinetics computer real-time detection system detects in real time and gravimetric method detection greater than 4%, precision is not high enough.
Claims (10)
1. chloroethylene polymerization kinetics real time tracing and detecting apparatus, gas is characterised in that, comprising:
Pressure unit (2) that one end is connected with reactor (1) respectively and temperature transmitter (3);
The reduction valve that has screen pack (6) that one end is connected with reactor (1);
A chromatograph (4) that is connected with the reduction valve that has screen pack (6) by pipeline, described chromatograph (4) is connected by pipeline with the carrier gas source of the gas;
An A/D converter (9) that is connected with the output terminal of the other end of pressure unit (2), temperature transmitter (3) and chromatograph (4) respectively is used for the chromatogram output signal of pressure unit (2), temperature transmitter (3) and chromatograph (4) is converted to digital signal;
A microprocessor (10) that is connected with A/D converter (9) is used to handle the signal from A/D converter 9, realizes detecting in real time data computing and output.
2. device according to claim 1, gas are characterised in that, a pressure maintaining valve is set after having the reduction valve of screen pack (6) again, send into chromatograph (4) by the gas sample that pressure maintaining valve will be gathered.
3. device according to claim 1 and 2, gas are characterised in that the sampling pipeline carries out complete stroke thermal insulating.
4. device according to claim 3 is characterized in that, adopts the ribbon heater insulation.
5. device according to claim 4 is characterized in that, between chromatogram (4) and microprocessor (10) amplifilter is set.
6. carry out the method that chloroethylene polymerization kinetics real time tracing detects according to each described device of claim 1～5, it is characterized in that, comprise the steps:
(1) the tracer agent butane is added reactor, the consumption of butane is about the 0.1-5% of vinyl chloride monomer weight, preferably 05-2.0%;
(2) open the reduction valve that has screen pack, the gas sample of polymeric kettle is input to gas chromatograph continuously by pipeline, opened six logical injectors in the chromatography at interval in 3-5 minute, make gas sample and carrier gas together enter gas chromatograph, after separating column separates, detect each component by conductance cell;
The signal that the conductance cell of the signal of the signal of pressure unit, temperature transmitter and gas chromatograph is detected is sent into A/D converter simultaneously, digital signal input microprocessor after will changing then adopts mathematical modulo pattern (1) to calculate the real-time conversion ratio of polyreaction.
7. method according to claim 6 is characterized in that the consumption of butane is about the 0.5-2.0% of vinyl chloride monomer weight; Helium is selected in said carrier gas for use.
8. method according to claim 6 is characterized in that, formula (1) is:
In the formula:
X-t moment reaction conversion ratio;
The peak area of A-t moment butane and the ratio of the peak area of 0 moment butane;
P
0, P
1-0 moment, t still are constantly pressed;
M
b-butane molecular weight;
M
mThe quality that-monomer is initial;
M
0-monomer is in the quality of polymer phase;
K
Bm, K
Bp, K
BwThe solubility coefficient of-butane in monomer, polymer phase, in the water;
D
b, D
pThe density of-butane and polymkeric substance;
q
0-0.5～5.0；
q
i-0.5～5.0；
q
x-0.5～5.0；
M
li＝M
0-M
g-M
w
M
l0＝M
0-M
g0-M
w0
M
G0The initial mass of-monomer in gas phase;
M
W0-monomer is in the initial mass of aqueous phase;
M
g-t is the quality of monomer in gas phase constantly;
M
w-t moment monomer is in the quality of aqueous phase;
M
GxMonomer is in the gas phase quality of shutting out during-X conversion ratio.
9. method according to claim 8 is characterized in that, adopts the computer system clock to interrupt collecting temperature, pressure data, and every 45-65ms sends the one query request to serial port, writes down a secondary data, asks average in a unit interval.
10. method according to claim 8, it is characterized in that, in calculation procedure, be provided with real-time contrast, calibration function, write down the mean value that preceding 5 secondary data change, more current gather the absolute value of data and difference last time guess this value by preceding 5 secondary data, chromatographic data is taked the mean value recording mode of transient data and preceding 4 secondary data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510025756 CN1699992A (en) | 2005-05-11 | 2005-05-11 | Chloroethylene polymerization kinetics real time tracing and detecting apparatus and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510025756 CN1699992A (en) | 2005-05-11 | 2005-05-11 | Chloroethylene polymerization kinetics real time tracing and detecting apparatus and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1699992A true CN1699992A (en) | 2005-11-23 |
Family
ID=35476138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510025756 Pending CN1699992A (en) | 2005-05-11 | 2005-05-11 | Chloroethylene polymerization kinetics real time tracing and detecting apparatus and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1699992A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954923A (en) * | 2011-08-31 | 2013-03-06 | 中国石油化工股份有限公司 | Polymerization-kinetic method for detecting vinyl chloride |
| CN109916819A (en) * | 2019-02-28 | 2019-06-21 | 南方科技大学 | Characterization method and characterization device for interfacial polymerization reaction |
-
2005
- 2005-05-11 CN CN 200510025756 patent/CN1699992A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954923A (en) * | 2011-08-31 | 2013-03-06 | 中国石油化工股份有限公司 | Polymerization-kinetic method for detecting vinyl chloride |
| CN109916819A (en) * | 2019-02-28 | 2019-06-21 | 南方科技大学 | Characterization method and characterization device for interfacial polymerization reaction |
| CN109916819B (en) * | 2019-02-28 | 2021-05-28 | 南方科技大学 | Characterization method and characterization device for interfacial polymerization reaction |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103710684B (en) | A kind of integrated on-line detecting system for chemical vapour deposition reaction | |
| CN203606055U (en) | Expansion pressure determining device for coking mines | |
| CN207081704U (en) | A kind of nitrogen oxide sensor evaluating system | |
| CN105136922A (en) | Adsorbent performance dynamic detection device | |
| CN104587695B (en) | Based on the internal thermally coupled distillation column control device of temperature wave characteristic | |
| CN106895977B (en) | A kind of low pressure (LP) cylinder final stage exhaust enthalpy measuring device and calculation method | |
| CN110907559B (en) | Universal fixed bed catalyst evaluation device | |
| CN106706543A (en) | Method for detecting content of carbon and sulfur in graphene based on high temperature combustion infrared absorption process | |
| CN103278220A (en) | Method for rapidly verifying intrinsic errors of membrane type gas meter and device thereof | |
| CN202903705U (en) | Testing device for dynamic vacuum stability test | |
| CN1699992A (en) | Chloroethylene polymerization kinetics real time tracing and detecting apparatus and method | |
| CN102590370B (en) | Method for synchronously determining monosaccharide, uronic acid and saccharic acid in wood fiber material reaction system | |
| CN102128888B (en) | Method for measuring phthalate plasticizer in paint | |
| CN104792656B (en) | The method and system of parahydrogen content in a kind of real-time measurement liquid hydrogen | |
| CN204347631U (en) | Based on the tank level control system of fuzzy | |
| CN102520013B (en) | Hot-film gas extinguishing chemical concentration sensing module | |
| CN1687715A (en) | Converter of signal sensed from flux of vortex street | |
| CN210604466U (en) | Coal water slurry gasification testing device | |
| CN110836933A (en) | Method for detecting acetylene gas in crude chloroethylene | |
| CN113588881A (en) | On-line monitoring method for available hydrogen amount of organic liquid hydrogen storage material | |
| CN206772873U (en) | Hydrogen analyzer is spread in a kind of intelligent quick high accuracy analysis metal | |
| CN110879211A (en) | Method for measuring cyano content in acrylonitrile-acrylate copolymer | |
| CN205120433U (en) | Smoke particulate dilution method sampling device | |
| CN217585887U (en) | Detection apparatus for on-line measuring timber heat, moisture and deformation | |
| CN202995483U (en) | A polyvinyl acetate online concentration control unit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |