CN204365250U - A kind of feeding device of the suspension polymerization preparation method for polyvinyl chloride - Google Patents
A kind of feeding device of the suspension polymerization preparation method for polyvinyl chloride Download PDFInfo
- Publication number
- CN204365250U CN204365250U CN201420869638.4U CN201420869638U CN204365250U CN 204365250 U CN204365250 U CN 204365250U CN 201420869638 U CN201420869638 U CN 201420869638U CN 204365250 U CN204365250 U CN 204365250U
- Authority
- CN
- China
- Prior art keywords
- feeding device
- tank
- raw water
- sodium hydroxide
- hydroxide solution
- 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
- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The utility model provides a kind of feeding device of the suspension polymerization preparation method for polyvinyl chloride.This feeding device comprises: peroxide container, peroxide storage tank, sodium hydroxide solution container, sodium hydroxide solution hold-up tank, chloro-formate storage drum, organic acid anhydride storage drum, waste liquid tank, scrubbing tower, Raw material pail automatic control unit, raw water add pipe; Peroxide solutions container is connected to peroxide storage tank, and peroxide solutions hold-up tank is connected to raw water and adds pipe; Sodium hydroxide solution container is connected to sodium hydroxide solution hold-up tank, and sodium hydroxide solution hold-up tank is connected to raw water and adds pipe; Chloro-formate storage drum and organic acid anhydride storage drum are located among Raw material pail automatic control unit; Raw water adds one end of pipe for inputting raw water, and the other end is connected to reactor; Chloro-formate storage drum is connected to raw water and adds pipe, and organic acid anhydride storage drum is connected to raw water and adds pipe.The instant of initator can be realized by adopting this feeding device to add continuously.
Description
Technical field
The utility model relates to a kind of feeding device of the suspension polymerization preparation method for polyvinyl chloride, belongs to polyvinyl chloride preparing technical field.
Background technology
Use suspension polymerization vinyl chloride under the prior art, in technical process, usually use organic catalyst, such as peroxide, azo-compound or protective colloid, as gelatin, methylcellulose, polyvinyl alcohol.Based on suspension polymer prepared by prior art step, its quality can not allow to greatest extent produces and Application Engineer's satisfaction, especially in heat endurance, require to use a large amount of heat stabilizers in polyvinyl chloride (PVC) modifying process, wherein, heat stabilizer is mainly products containing lead.
In fact, standard suspension PVC polymerization technique has contemplated the main component (vinyl chloride VCM, water, auxiliary agent) added before polymerization starts, need the initator adding q.s to carry out activating reaction and continue to add when starting polymerisation, until terminate reaction in set program time.The most frequently used initator is organic peroxide class (kind is different, performance is various), have good effect, but some critical defect also can have influence on processing characteristics and the quality of finished product PVC simultaneously.
Current line in the industry suspension PVC (S-PVC) mainly uses stainless steel autoclave to carry out suspension polymerization production by pan feeding technique in batches.VCM is polymerized according to free radical mechanism; monomer enters reactor in liquid form; comprise demineralized water, dispersant (protecting colloid, surfactant), buffer salt under aqueous phase, usually also can contain defoamer, finally be separated into droplet through Keep agitation.
Initator adds rear beginning polymerisation, and is dissolved in organic VCM phase.During polymerization, must continuous agitated medium.Therefore, polymerisation is only carried out between VCM drop.In the pressure of VCM saturated vapor, react and carry out under the constant temperature of 35-75 DEG C.Finally, the polymerisation of VCM stops afterwards adding the terminator (Killing agent) can catching free radical.Generally, according to producing configuration and operating feature, the average conversion between VCM and finished product PVC is 82-86%.And terminator is the chemical products that a class price is higher.
The form of suspension PVC, the microstructure of S-PVC particle depend on polymerization temperature, the type of dispersant and quantity, type of stirrer and stirring condition.
The initator that VCM polymerisation is commonly used is generally dissimilar organic peroxide and azo-compound, solid long chain allcyl peroxydicarbonate, such as diethyl acyl-oxygen two carbon or two nutmeg persalt, be mainly mixed with water slurry, be widely used because it stablizes easy to operate.After a certain amount of initator joins reactor, there is higher repeatability/reproducibility, and because of its dissolubility in water extremely low, the surface of reactor can form duricrust mostly.
Nowadays increasing solid peroxygen two carbonate replace by liquid peroxy two carbonate, liquid peroxy two carbonate is more cheap, also can be dissolved in VCM faster.But there is higher explosive risk, so must careful operation, this also become the industry daily faced by a difficult problem.
The performance of organic peroxide depends primarily on resolution ratio, is represented by the half-life under specified temp, and as mentioned above, because polymerization temperature is different, two or more dissimilar initator often combinationally uses.
When preparing PVC (K80 to the K100) of high-k, polymeric reaction temperature is lower than 50 DEG C, and fast initiators (such as joining isobutyryl peroxide) is often used to promote the trigger rate slowly caused by lower polymerization temperature.This kind of initator is often combined with slightly slow initator (such as joining isobutyryl peroxide).The PVC of K value between 70-80 is often used in after fast initiators and peroxydicarbonate mixing.
The S-PVC of specification between K50-K70 uses peroxydicarbonate, neutral active perester and diacyl peroxide or these initators to be combined and produces.At the initiating stage initial stage, because initator is diffused into VCM drop and then gathering, the droplet of initator rapidly disappears.At the polymerization process initial stage until conversion ratio is 15%, monomer droplet is scatter-gather again, and initator is dispersed between VCM drop equably.
The distribution of initator on VCM drop can affect the form of finished product S-PVC particle.If initator is not be evenly distributed on each VCM drop, the particle not with hole will be formed, be called as plasticizing particle.These non-porous paricles have coloured glaze matter characteristic, and high density is almost spherical in shape.Compact glassy state particle is difficult to processing.Because hole is not enough, the intake of plasticizer and stabilizing agent is few, and not easily gel is shaping in process to cause these particles.The existence of these particles causes finished product S-PVC surface to occur visible flaw, i.e. so-called " flake ".
The generation of these atresia glassy state particles comes from polymerisation inside a large amount of initator drops, instead of the typical polymerization between VCM drop.When initator does not fully disperse in aqueous medium, formed compared with the initator drop of wide particle diameter distribution.Under normal circumstances, little initator drop can due to larger VCM droplets agglomerate and quick disappearance.But the appearance of larger VCM drop is because the fusion of less VCM drop and these initator drops creates reverse effect.The number ratio of a small amount of VCM drop and a large amount of initator drop determines the polymerization change of initator drop internal and the formation of these glassy state particles.
Another subject matter existed is that these glassy state particles have poor heat endurance, and this phenomenon is very likely that the shortage coming from monomer causes initator fragment to clash into polymer chain and then causes the generation of unsaturation structure.
The initator residue be present in PVC also can affect the degraded of polymer in process.Under the hot conditions that machining needs, living radical group can be formed, from polymer chain, extract H-carry out dehydrochlorination, cause PVC product initial coloration.If peroxide is easily by the water hydrogenation (mainly producing the phase after polymerisation) existed in polymerization reaction system, so in process, the degraded of PVC can decline because initator less in material is remaining thereupon.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of feeding device of the suspension polymerization preparation method for polyvinyl chloride, can realize the control for initator feed postition by this feeding device, realizes the instant of initator and adds continuously.
For achieving the above object, the utility model provides a kind of feeding device of the suspension polymerization preparation method for above-mentioned polyvinyl chloride, and this feeding device comprises: peroxide container, peroxide storage tank, sodium hydroxide solution container, sodium hydroxide solution hold-up tank, chloro-formate storage drum, organic acid anhydride storage drum, waste liquid tank, scrubbing tower, Raw material pail automatic control unit, raw water add pipe;
Described peroxide solutions container is connected to described peroxide storage tank by the first pump, and described peroxide solutions hold-up tank is connected to described raw water by the first charge pump and adds pipe;
Described sodium hydroxide solution container is connected to described sodium hydroxide solution hold-up tank by the second pump, and described sodium hydroxide solution hold-up tank is connected to described raw water by the second charge pump and adds pipe;
Described chloro-formate storage drum and described organic acid anhydride storage drum are located among described Raw material pail automatic control unit, and described Raw material pail automatic control unit is provided with exhaust ventilation, blower fan, vertical pump; Described blower fan is connected with described scrubbing tower, and described vertical pump is connected with described waste liquid tank;
Described raw water adds one end of pipe for inputting raw water, and the other end is connected to the reactor top of this feeding device outside;
Described chloro-formate storage drum is connected to described raw water by the 3rd charge pump and adds pipe, and described organic acid anhydride storage drum is connected to described raw water by the 4th charge pump and adds pipe;
The bottom of described scrubbing tower is connected with described waste liquid tank;
Described waste liquid tank is provided with NaOH input channel;
Described waste liquid tank is connected to the outside of this feeding device by the 4th pump.
In above-mentioned feeding device, preferably, the pipeline at described scrubbing tower top is connected to incinerated matter collection place of this feeding device outside.
In above-mentioned feeding device, preferably, the pipeline on the left of described scrubbing tower is connected to the liquid waste treating apparatus of this feeding device outside.
In above-mentioned feeding device, preferably, described waste liquid tank is connected to the filter-pressing device of this feeding device outside by the 4th pump.
Feeding device provided by the utility model is mainly used in the four kinds of raw materials adding initator compound in reactor, chloro-formate, peroxide, organic acid anhydride and sodium hydroxide solution put into different containers respectively, control opportunity of adding and addition by charge pump.
Wherein, chloro-formate storage drum, organic acid anhydride storage drum are located in Raw material pail automatic control unit (box for automatic drums handling), are respectively used to chloro-formate, the organic acid anhydride in the reactors to be added such as splendid attire.Raw material pail automatic control unit is for placing chloro-formate storage barrel and organic acid anhydride storage barrel, and the Main Function of its blower fan arranged is vented exhaust, and waste liquid is collected in the effect of vertical pump, and is delivered in waste liquid tank, keeps dissolution homogeneity without precipitation.
In this feeding device, the purposes of waste liquid tank collects waste liquid, and the 4th pump bottom waste liquid tank is connected to filter-pressing device, is finally connected to outside liquid waste treating apparatus.
Feeding device provided by the utility model is mainly used in the four kinds of raw materials adding initator compound in reactor, chloro-formate, peroxide, organic acid anhydride and sodium hydroxide solution put into different containers respectively, control opportunity of adding and addition by charge pump.By adopting this feeding device, by different storages among different containers, then on different opportunitys, different raw materials is joined in reactor as required, and can add several times, thus realize initator raw material continue add, such as initator compound is added at twice:
For the first time, add 30%-70% (preferably 50%) before reactions: first add chloro-formate, organic acid anhydride, then add peroxide and NaOH;
For the second time, after reaction starts, before the half-life of the initator compound added before, add remaining initator compound: first add remaining chloro-formate, organic acid anhydride, and then (in such as 2-3 hour) adds remaining peroxide and NaOH.
In the process adding initator compound, first time adds fashionable, first adds chloro-formate, organic acid anhydride, then adds peroxide, NaOH, and after adding, the reaction of synthesis PVC starts to carry out; Along with the carrying out of reaction, initator compound consumes gradually, add remaining initator compound (namely second time adds or adds continuously) again, in 2-3 hour, complete second time add, reaction proceeds, when VCM monomer concentration in reactor fall or pH value low to a certain extent time reaction automatically stop, Pressure Drop is at about 2 kilograms; Do not need to add polymerization terminator.In this way, the carrying out reacted can be controlled well, keep the exothermic equilibrium of reaction, thus make the temperature of recirculated water be unlikely to too high, thus do not need to add polymerization terminator, realize polymerisation and automatically stop.
Add 30-70% (preferably 50%) before reactions, after starting reaction, add remaining part successively.Follow-up add the initator compound of remainder time, can control to add in 2-3 hour, concrete add speed and can control as required.
PVC suspension polymerisation can be carried out in the stainless steel autoclave of 1.0Lt. (the medium-sized reactor of Switzerland Buchiglas AG), and mixer design can bear the operating pressure of maximum 200bar, the maximum operating temperature of 300 DEG C.Reactor is furnished with an anchor agitator, two thermocouples: one is arranged on reactor inside, uses as baffle plate simultaneously; Another is installed in reacting kettle jacketing.Temperature of reaction kettle is maintained by electric heating, with water cooling system, is all positioned at chuck.Temperature control is carried out at the proportional plus integral plus derivative controller (T640 integrated circuit processor) of+0.1 DEG C by using a precision.Two sampler barrels are used for reactor supercharging or provide vacuum.The parts contacted with VCM, if pipeline, sampler barrel, valve, cylinder etc. are all from Shi Weiluoke company (Swagelok) buying, reactor container, lid, agitator and baffle plate are made up of AISI 316L type stainless steel.Sealing ring between pressure vessel and lid is made up of PF 131, AS244.
The continuous charging of initator can be realized by the reciprocating pump of conputer controlled (i.e. charge pump).Whole technique can be controlled by computer, sets parameters before polymerization starts.
When implementing adopting this feeding device to utilize suspension polymerisation to prepare the method for polyvinyl chloride, can operate in such a way:
Peroxide and sodium hydroxide solution are added respectively in peroxide container and sodium hydroxide solution container, during use, inputted in peroxide storage tank, sodium hydroxide solution hold-up tank respectively by the first pump, the second pump; When needs add fashionable in reactor, then respectively by the first charge pump and the second charge pump, peroxide, sodium hydroxide solution are joined raw water and add in pipe, add pipe by this raw water and added by the entrance at reactor top;
Chloro-formate and organic acid anhydride are stored among chloro-formate storage drum, organic acid anhydride storage drum respectively, when needs add fashionable, respectively by the 3rd charge pump and the 4th charge pump, chloro-formate, organic acid anhydride are joined raw water and add in pipe, add pipe by this raw water and added by the entrance at reactor top;
When the material concentration in Raw material pail automatic control unit is too high, can be regulated by blower fan and exhaust ventilation, the waste liquid produced is collected and injects waste liquid tank by vertical pump, processed by scrubbing tower, the sodium hydroxide solution required for scrubbing tower is added by NaOH input channel; The pipeline at scrubbing tower top is connected to incinerated matter collection place, exports for gas washing produced; Waste liquid tank and wash tower bottoms are connected to outside liquid waste treating apparatus by the 4th pump, for the waste liquid amount of being further processed.
The instant of initator can be realized by adopting the feeding device that provides of the utility model adding continuously, can be evenly distributed within the extremely short time on VCM drop, replace and only add in the polymerisation incipient stage solid material that granular size differs.Further, due to the instant continuous charging of initator, reaction is able to automatic control, does not re-use polymerization terminator in the final stage of reaction.
Accompanying drawing explanation
The structural representation of the feeding device that Fig. 1 provides for embodiment 1.
Main Reference label declaration:
Peroxide container 1, peroxide storage tank 2, sodium hydroxide solution container 3, sodium hydroxide solution hold-up tank 4, chloro-formate storage drum 5, organic acid anhydride storage drum 6, waste liquid tank 7, scrubbing tower 8, Raw material pail automatic control unit 9, raw water adds pipe 10, exhaust ventilation 11, blower fan 12, NaOH input pipe 13, first pump 101, second pump 102, vertical pump 103, 4th pump 104, first charge pump 201, second charge pump 202, 3rd charge pump 203, 4th charge pump 204
Detailed description of the invention
In order to there be understanding clearly to technical characteristic of the present utility model, object and beneficial effect, existing following detailed description is carried out to the technical solution of the utility model, but can not be interpreted as to of the present utility model can the restriction of practical range.
Embodiment 1
Present embodiments provide a kind of feeding device of the suspension polymerization preparation method for polyvinyl chloride, its structure as shown in Figure 1.This feeding device comprises: peroxide container 1, peroxide storage tank 2, sodium hydroxide solution container 3, sodium hydroxide solution hold-up tank 4, chloro-formate storage drum 5, organic acid anhydride storage drum 6, waste liquid tank 7, scrubbing tower 8, Raw material pail automatic control unit 9, raw water add pipe 10;
Described peroxide container 1 is connected to described peroxide storage tank 2 by the first pump 101, and described peroxide storage tank 2 is connected to described raw water by the first charge pump 201 and adds pipe 10;
Described sodium hydroxide solution container 3 is connected to described sodium hydroxide solution hold-up tank 4 by the second pump 102, and described sodium hydroxide solution hold-up tank 4 is connected to described raw water by the second charge pump 202 and adds pipe 10;
Described chloro-formate storage drum 5 and described organic acid anhydride storage drum 6 are located in described Raw material pail automatic control unit 9, and described Raw material pail automatic control unit 9 is provided with exhaust ventilation 11, blower fan 12, vertical pump 103; Described blower fan 12 is connected with described scrubbing tower 8, and described vertical pump 103 is connected with described waste liquid tank 7;
Described chloro-formate storage drum 5 is connected to described raw water by the 3rd charge pump 203 and adds pipe 10, and described organic acid anhydride storage drum 6 is connected to described raw water by the 4th charge pump 204 and adds pipe 10;
Described raw water adds one end of pipe 10 for inputting raw water, and the other end is connected to reactor top, can bring in reactor by various raw material by the water of input;
The bottom of described scrubbing tower 8 is connected with described waste liquid tank 7;
Described waste liquid tank 7 is provided with NaOH input channel 13;
Described waste liquid tank 7 is connected to device outside by the 4th pump 104.
Implement utilizing feeding device of the present utility model can operate in such a way when utilizing suspension polymerisation to prepare the method for polyvinyl chloride:
Hydrogen peroxide and sodium hydroxide solution are added respectively in peroxide container 1 and sodium hydroxide solution container 3, during use, inputted in peroxide storage tank 2, sodium hydroxide solution hold-up tank 4 respectively by the first pump 101, second pump 102; When needs add fashionable in reactor, then respectively by the first charge pump 201 and the second charge pump 202, hydrogen peroxide, sodium hydroxide solution are joined raw water and add in pipe 10, add pipe 10 by this raw water and added by the entrance at reactor top;
Ethyl chloroformate and propionic andydride are stored among chloro-formate storage drum 5, organic acid anhydride storage drum 6 respectively, when needs add fashionable, respectively by the 3rd charge pump 203 and the 4th charge pump 204, ethyl chloroformate, propionic andydride are joined raw water and add in pipe 10, add pipe 10 by this raw water and added by the entrance at reactor top;
When the material concentration in Raw material pail automatic control unit 9 is too high, can be regulated by blower fan 12 and exhaust ventilation 11, the waste liquid produced is collected and injects waste liquid tank 7 by vertical pump 103, processed by scrubbing tower 8, the sodium hydroxide solution required for scrubbing tower 8 is added by NaOH input channel 13; The pipeline at scrubbing tower 8 top is connected to incinerated matter collection place, exports for gas washing produced; Outside liquid waste treating apparatus is connected to, for being further processed waste liquid by the 4th pump 104 bottom waste liquid tank 7 and scrubbing tower 8.
Claims (4)
1. the feeding device for the suspension polymerization preparation method of polyvinyl chloride, it is characterized in that, this feeding device comprises: peroxide container, peroxide storage tank, sodium hydroxide solution container, sodium hydroxide solution hold-up tank, chloro-formate storage drum, organic acid anhydride storage drum, waste liquid tank, scrubbing tower, Raw material pail automatic control unit, raw water add pipe;
Described peroxide solutions container is connected to described peroxide storage tank by the first pump, and described peroxide solutions hold-up tank is connected to described raw water by the first charge pump and adds pipe;
Described sodium hydroxide solution container is connected to described sodium hydroxide solution hold-up tank by the second pump, and described sodium hydroxide solution hold-up tank is connected to described raw water by the second charge pump and adds pipe;
Described chloro-formate storage drum and described organic acid anhydride storage drum are located among described Raw material pail automatic control unit, and described Raw material pail automatic control unit is provided with exhaust ventilation, blower fan, vertical pump; Described blower fan is connected with described scrubbing tower, and described vertical pump is connected with described waste liquid tank;
Described raw water adds one end of pipe for inputting raw water, and the other end is connected to the reactor top of this feeding device outside;
Described chloro-formate storage drum is connected to described raw water by the 3rd charge pump and adds pipe, and described organic acid anhydride storage drum is connected to described raw water by the 4th charge pump and adds pipe;
The bottom of described scrubbing tower is connected with described waste liquid tank;
Described waste liquid tank is provided with NaOH input channel;
Described waste liquid tank is connected to the outside of this feeding device by the 4th pump.
2. the feeding device of the suspension polymerization preparation method for polyvinyl chloride according to claim 1, is characterized in that, the pipeline at described scrubbing tower top is connected to incinerated matter collection place of this feeding device outside.
3. the feeding device of the suspension polymerization preparation method for polyvinyl chloride according to claim 1, is characterized in that, the pipeline on the left of described scrubbing tower is connected to the liquid waste treating apparatus of this feeding device outside.
4. the feeding device of the suspension polymerization preparation method for polyvinyl chloride according to claim 1, is characterized in that, described waste liquid tank is connected to the filter-pressing device of this feeding device outside by the 4th pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420869638.4U CN204365250U (en) | 2014-12-31 | 2014-12-31 | A kind of feeding device of the suspension polymerization preparation method for polyvinyl chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420869638.4U CN204365250U (en) | 2014-12-31 | 2014-12-31 | A kind of feeding device of the suspension polymerization preparation method for polyvinyl chloride |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204365250U true CN204365250U (en) | 2015-06-03 |
Family
ID=53321499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420869638.4U Active CN204365250U (en) | 2014-12-31 | 2014-12-31 | A kind of feeding device of the suspension polymerization preparation method for polyvinyl chloride |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204365250U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016106964A1 (en) * | 2014-12-31 | 2016-07-07 | 青岛威德森贸易有限公司 | Method for preparing polyvinyl chloride by suspension and polymerization, and feeding device |
-
2014
- 2014-12-31 CN CN201420869638.4U patent/CN204365250U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016106964A1 (en) * | 2014-12-31 | 2016-07-07 | 青岛威德森贸易有限公司 | Method for preparing polyvinyl chloride by suspension and polymerization, and feeding device |
| US10308739B2 (en) | 2014-12-31 | 2019-06-04 | Amos Chemicals Inc. | Method for preparing polyvinyl chloride by suspension and polymerization, and feeding device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105801732B (en) | The suspension polymerization preparation method and feeding device of a kind of polyvinyl chloride | |
| CN113292470B (en) | Continuous flow synthesis process of peroxy-2-ethylhexyl tert-butyl carbonate without amplification effect | |
| CN108299175A (en) | A kind of zinc acetylacetonate preparation process | |
| CN102690382A (en) | Linear low density polyethylene synthesis process by means of chlorination through aqueous suspension method | |
| CN109651539A (en) | For producing micro- reaction system of polyvinyl chloride and the Production of PVC method based on the system | |
| CN204365250U (en) | A kind of feeding device of the suspension polymerization preparation method for polyvinyl chloride | |
| US3962197A (en) | Suspension polymerization process | |
| EP1230019B1 (en) | Emulsion polymerization process and reactor for such a process | |
| CN208275392U (en) | A kind of continuous neutralization device | |
| CN106749802B (en) | A kind of preparation method and preparation system of high polymerization degree narrow ditribution polyvinyl alcohol | |
| KR20080106235A (en) | Continuous process for the production of vinyl chloride (co)polymers | |
| WO2020221435A1 (en) | Method for producing aqueous polymer dispersions in a tube reactor | |
| JPS608305A (en) | Novel polyvinyl chloride suspension polymerization and product | |
| EP1924352B1 (en) | Loop reactor for emulsion polymerisation | |
| Ullah et al. | Optimization of saponification reaction in a continuous stirred tank reactor (CSTR) using design of experiments | |
| CN114019802A (en) | Sampling control method and system for two-stage chemical reactor system | |
| CN110256320A (en) | The synthetic method of dicetyl peroxydicarbonate two (2- ethylhexyl) ester | |
| Zimmermann | Poly (vinyl chloride) polymerization performance‐enhancing initiators with emphasis on high activity grades and water‐based dispersions | |
| CN109651138A (en) | Adipate monoester continuous producing method | |
| CN108499504B (en) | Continuous neutralization device and process thereof | |
| EP0450600B1 (en) | Process for the preparation of vinyl chloride polymers | |
| US20230406978A1 (en) | Process for preparing aqueous polymer dispersions in a tubular reactor | |
| JPS62235303A (en) | Method for feeding suspension stabilizer in vinyl chloride suspension polymerization method | |
| CN108854858A (en) | The feeding device and technique of synthesized polymer initiator in a kind of kettle | |
| CN202823188U (en) | Free radical synthesizing pipeline mixing device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 266071 A block, World Trade Center, No. 6 middle Hongkong Road, Shandong, Qingdao, China 23F Patentee after: QINGDAO WEIDESEN RESOURCE TECHNOLOGY CO.,LTD. Address before: 266071 A block, World Trade Center, No. 6 middle Hongkong Road, Shandong, Qingdao, China 23F Patentee before: QINGDAO WIDESUN TRADE Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20160628 Address after: Shandong city of Qingdao province Hongkong city 266000 A Road No. 6 Building 24 layer C Patentee after: Qingdao Amos Resources Technology Co.,Ltd. Address before: 266071 A block, World Trade Center, No. 6 middle Hongkong Road, Shandong, Qingdao, China 23F Patentee before: QINGDAO WEIDESEN RESOURCE TECHNOLOGY CO.,LTD. |