CN209155838U - A kind of ethoxylation equipment being used to prepare high-viscosity polymer - Google Patents
A kind of ethoxylation equipment being used to prepare high-viscosity polymer Download PDFInfo
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- CN209155838U CN209155838U CN201821747349.1U CN201821747349U CN209155838U CN 209155838 U CN209155838 U CN 209155838U CN 201821747349 U CN201821747349 U CN 201821747349U CN 209155838 U CN209155838 U CN 209155838U
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Abstract
The utility model relates to technical field of chemical production equipment, more particularly to a kind of ethoxylation equipment for being used to prepare high-viscosity polymer, including reactor, ethylene oxide feed pipe, and the initiator feed pipe being connected to reactor, catalyst charge pipe, premixed device and external circulating system, the ethylene oxide feed pipe is connected to premixed device, the external circulating system includes circulating pump and heat exchanger, the reactor, circulating pump, heat exchanger and premixed device are sequentially communicated, the reactor is provided with the atomising device being connected to premixed device and the agitating device for stirred reactor materials inside, the atomising device is located in the top of reactor.The utility model avoids that local viscosity is excessive and increasing the load of circulating pump leads to the danger of reactor all standing while increasing the molecular weight of product, improving material viscosity.
Description
Technical field
The utility model relates to technical field of chemical production equipment, and in particular to a kind of high-viscosity polymer of being used to prepare
Ethoxylation equipment.
Background technique
Ethoxylation refers to that under the effect of the catalyst (initiator is to contain active hydrogen for ethylene oxide and initiator
Organic compound) occur opening, ethoxylation is the important technology for preparing nonionic surfactant, second
Oxygroup nonionic surfactant has excellent biological degradability and adapts to hard water ability, is widely used in detergent, stone
The industrial circles such as oil and pesticide.
Ethoxylation generally is carried out using conventional reactor and Jim Press reactor in the prior art, is followed outside Jim Press
Ring ethyoxyl equipment has many advantages, such as that efficient, safety, energy conservation, reaction rate are fast, is widely used in the reaction of liquid state chemicals,
But Jim Press outer circulation ethoxylation equipment is only applicable to the synthesis of middle low molecular weight product, in production high viscosity, molecular weight
The case where when big product, circulating pump load is increased, and is easy to appear all standing, and the reaction was continued in kettle that there are biggish peaces for material
Full blast danger.
Summary of the invention
In order to overcome shortcoming and defect existing in the prior art, the purpose of this utility model is to provide one kind for making
The ethoxylation equipment of standby high-viscosity polymer avoids part viscous while the molecular weight for increasing product, improving material viscosity
Spending load that is big and increasing circulating pump leads to the danger of reactor all standing.
The purpose of this utility model is achieved through the following technical solutions: a kind of ethyoxyl being used to prepare high-viscosity polymer
Change equipment, including reactor, ethylene oxide feed pipe and the initiator feed pipe, the catalyst charge that are connected to reactor
Pipe, premixed device and external circulating system, the ethylene oxide feed pipe are connected to premixed device, and the external circulating system includes circulating pump
And heat exchanger, the reactor, circulating pump, heat exchanger and premixed device are sequentially communicated, the reactor is provided with to be connected with premixed device
Logical atomising device and the agitating device for stirred reactor materials inside, the atomising device are located in the top of reactor
Portion.
Preferably, the atomising device includes material feed pipe and at least two atomizers, the material feed pipe
Feed inlet be connected to the discharge port of premixed device, the feed inlet of each atomizer with the discharge port of the material feed pipe connect
It is logical.
Preferably, the agitating device includes that the driving motor for being set to reactor head and driving motor are sequentially connected
Agitating shaft and multiple stirring rods with stirring axis connection, each stirring rod is provided with paddle far from one end of agitating shaft
Wheel, the agitating shaft are arranged in the top of the reactor, and the stirring rod and agitator arm are located in reactor.
Preferably, the shape of the agitator arm is S-shaped, and the both ends of the agitator arm are provided with the wedge-shaped edge of a knife.
Preferably, the external circulating system further includes the first regulating valve and the viscosity for monitoring reactor discharging viscosity
Meter, the both ends of first regulating valve are connected to circulating pump and heat exchanger respectively, and the viscosimeter is set to circulating pump and first
Between regulating valve, bypass has finished product discharge nozzle, the finished product discharge nozzle setting between the circulating pump and the first regulating valve
There is the second regulating valve.
Preferably, the external circulating system further includes first pump housing and second pump housing, the feed inlet of first pump housing
It is connected to the discharge port of heat exchanger with the feed inlet of second pump housing, the discharge port of first pump housing and the feed inlet of premixed device
Connection, the discharge port of second pump housing are connected to the side wall of reactor.
Preferably, the reactor is provided with pressure test table for monitoring reactor pressure and for monitoring reactor
The thermometer of temperature.
Preferably, the vacuum-pumping tube and use for making the inside of reactor form vacuum are communicated at the top of the reactor
In the nitrogen inlet duct for being filled with nitrogen to reactor, the vacuum-pumping tube is provided with the first control valve, and the nitrogen inlet duct is set
It is equipped with the second control valve.
Preferably, the ethoxylation equipment further includes the cooling water of superconducting pipe and the heat for absorbing superconducting pipe
One end of slot, the superconducting pipe is fixedly connected with reactor, and the bottom of cooling trough is protruded into one end of the superconducting pipe.
The utility model has the beneficial effects that: the ethoxylation for being used to prepare high-viscosity polymer of the utility model is set
Standby, catalyst, initiator flow into reactor via catalyst charge pipe and initiator feed pipe respectively；Under the action of catalyst,
Ethylene oxide enters material mixing pre-reaction of the premixed device with external circulating system via ethylene oxide feed pipe, then via reactor
Interior atomising device forms droplet and is discharged and slowly falls into the liquid surface in reactor, and during this period, ethylene oxide is being catalyzed
The lower material further occurrence ethoxylation with external circulating system of agent effect, increases the molecular weight of product, improves material
Another secondary response in viscosity, then liquid in reactor, improves the utilization rate of ethylene oxide, further increases material viscosity；
Since ethoxylation is exothermic reaction, even if temperature height advantageously reduces material viscosity, but excessively high reduce instead of temperature turns
The heat exchanger of rate, external circulating system can reduce the temperature of charge of external circulating system, and then reach cooling effect, control reactor
Interior reaction temperature；Under the stirring action of agitating device, keep the liquid agitation in reactor uniform, avoids local reaction temperature
It is excessively high, promote reaction, liquid viscosity is uniform, avoids that local viscosity is excessive and increasing the load of circulating pump leads to reactor all standing
Danger.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the structural schematic diagram of stirring rod and agitator arm described in the utility model.
Appended drawing reference are as follows: 1, reactor；2, ethylene oxide feed pipe；3, initiator feed pipe；4, catalyst charge pipe；5,
Premixed device；6, circulating pump；7, heat exchanger；8, material feed pipe；9, atomizer；10, driving motor；11, agitating shaft；12, it stirs
Mix bar；13, agitator arm；14, the wedge-shaped edge of a knife；15, the first regulating valve；16, viscosimeter；17, finished product discharge nozzle；18, it second adjusts
Save valve；19, first pump housing；20, second pump housing；21, pressure test table；22, thermometer；23, vacuum-pumping tube；24, nitrogen air inlet
Pipe；25, the first control valve；26, the second control valve；27, superconducting pipe；28, cooling trough.
Specific embodiment
For the ease of the understanding of those skilled in the art, below with reference to examples and drawings 1-2 to the utility model make into
The explanation of one step, the content that embodiment refers to not are the restriction to the utility model.
As shown in Figs. 1-2, a kind of ethoxylation equipment being used to prepare high-viscosity polymer, including reactor 1, epoxy second
Alkane feed pipe 2 and the initiator feed pipe 3 being connected to reactor 1, catalyst charge pipe 4, premixed device 5 and outer circulation system
System, the ethylene oxide feed pipe 2 is connected to premixed device 5, and the external circulating system includes circulating pump 6 and heat exchanger 7, it is described instead
Device 1, circulating pump 6, heat exchanger 7 and premixed device 5 is answered to be sequentially communicated, the reactor 1 is provided with the atomization dress being connected to premixed device 5
Set and for 1 materials inside of stirred reactor agitating device, the atomising device is located in the top of reactor 1.
In actual use, catalyst, initiator flow into reaction via catalyst charge pipe 4 and initiator feed pipe 3 respectively
Device 1；Under the action of catalyst, the material that ethylene oxide enters premixed device 5 and external circulating system via ethylene oxide feed pipe 2 is mixed
Pre-reaction is closed, then forms droplet via the atomising device in reactor 1 and is discharged and slowly falls into the liquid surface in reactor 1,
During this period, ethylene oxide increases under the action of catalyst with the material further occurrence ethoxylation of external circulating system
The molecular weight of product improves material viscosity, then the another secondary response in the liquid in reactor 1, improves making for ethylene oxide
With rate, material viscosity is further increased；Since ethoxylation is exothermic reaction, even if temperature height advantageously reduces material and glues
Degree, but temperature is excessively high reduces conversion ratio instead, and the heat exchanger 7 of external circulating system can reduce the temperature of charge of external circulating system, into
And reach cooling effect, control the reaction temperature in reactor 1；Under the stirring action of agitating device, make the liquid in reactor 1
Body stirs evenly, and avoids local reaction temperature excessively high, promotes reaction, liquid viscosity is uniform, avoids local viscosity excessive and increases
The load of circulating pump 6 leads to the danger of reactor 1 all standing.In ethylene oxide feed pipe 2, initiator feed pipe 3, catalysis
Under the cooperation of agent feed pipe 4 and external circulating system, the liquid volume in reactor 1 accounts for the 1/2-2/3 of 1 internal volume of reactor.
In the present embodiment, the reactor 1 is vertical reactor 1, is more advantageous to cooperation agitating device and uses, mixing effect is more preferably；Institute
Stating heat exchanger 7 is tubular heat exchanger 7, and heat transfer effect more preferably, reduces the temperature of charge of external circulating system more quickly.
The atomising device includes material feed pipe 8 and at least two atomizers 9, the material feed pipe 8 into
Material mouth is connected to the discharge port of premixed device 5, and the feed inlet of each atomizer 9 connects with the discharge port of the material feed pipe 8
It is logical.
In the present embodiment, at least two atomizers 9 are provided with, the material of premixed device 5 is conveyed via material feed pipe 8
To atomizer 9, it is uniformly distributed in the gas compartment of reactor 1 after atomization, increases reaction compartment, improves reaction efficiency, ring
Oxidative ethane with the material further occurrence ethoxylation of external circulating system, increases the molecule of product under the action of catalyst
Amount improves product viscosity；In addition, at least two atomizers 9 of setting are than one atomizer 9 of setting, to be more advantageous to viscosity high
Discharge of materials, avoids due to viscosity height that mass rate of emission is slow, and the material of premixed device 5 cannot discharge in time, and material in reactor 1 supplies
Deficiency is answered, reaction conversion ratio is influenced.Further, the material feed pipe 8 is arranged in the top of reactor 1.
The agitating device includes that the driving motor 10 for being set to 1 top of reactor and driving motor 10 are sequentially connected
Agitating shaft 11 and multiple stirring rods 12 connecting with agitating shaft 11, each stirring rod 12 are respectively provided with far from one end of agitating shaft 11
There is agitator arm 13, the agitating shaft 11 is arranged in the top of the reactor 1, and the stirring rod 12 and agitator arm 13 hold
Set on reactor 1.
In the present embodiment, agitator arm 13 is equipped on multiple stirring rods 12, driving motor 10 drives 11 turns of agitating shaft
It is dynamic, it drives stirring rod 12 and agitator arm 13 to rotate along agitating shaft 11, keeps the liquid agitation in reactor 1 uniform, avoid part
Reaction temperature is excessively high, promotes reaction, and liquid viscosity is uniform, avoids that local viscosity is excessive and increasing the load of circulating pump 6 causes
The danger of 1 all standing of reactor.Preferably, multiple stirring rods 12 are arranged along 11 axially spaced-apart of agitating shaft, are more advantageous to reaction
Material stirring in device 1 is uniform, and the material viscosity reacted is uniform.
The shape of the agitator arm 13 is S-shaped, and the both ends of the agitator arm 13 are provided with the wedge-shaped edge of a knife 14.
By adopting the above technical scheme, it is more advantageous to the highly viscous material of stirring, keeps the material stirring in reactor 1 uniform,
It is more smooth in whipping process, stirring efficiency is improved, the workload of agitating device is reduced.
The external circulating system further includes the first regulating valve 15 and the viscosimeter for monitoring the discharging viscosity of reactor 1
16, the both ends of first regulating valve 15 are connected to circulating pump 6 and heat exchanger 7 respectively, and the viscosimeter 16 is set to circulating pump 6
And first between regulating valve 15, bypass has a finished product discharge nozzle 17 between the circulating pump 6 and the first regulating valve 15, it is described at
Product discharge nozzle 17 is provided with the second regulating valve 18.
In actual use, it when the reading of viscosimeter 16 reaches scheduled product viscosity, opens the second regulating valve 18 and adjusts
To maximum stream flow, adjusting the first regulating valve 15 reduces its mass flow, and a part of material is exported via finished product discharge nozzle 17, remaining
Material finally returns that reactor 1 continues cycling through operation via heat exchanger 7, premixed device 5, and premixed device 5 is avoided there was only ethylene oxide streams
Enter reactor 1 and leads to reacting ethylene oxide not exclusively and increase the incidence of safety accident.
The external circulating system further includes first pump housing 19 and second pump housing 20, the feed inlet of first pump housing 19 and
The feed inlet of second pump housing 20 is connected to the discharge port of heat exchanger 7, the discharge port of first pump housing 19 and premixed device 5 into
Material mouth connection, the discharge port of second pump housing 20 are connected to the side wall of reactor 1.
In the present embodiment, after heat exchanger 7 reduces temperature of charge, the viscosity of material is higher than the viscosity before heat exchange, adopts
Material is conveyed with first pump housing 19 and second pump housing 20, avoids 6 workload of circulating pump is excessive from causing material transfer efficiency low, very
To damage circulating pump 6；In addition, using second pump housing 20 by material diversion to reactor 1, when being conducive to material and pouring reactor 1
Play the role of mixing, while avoiding first pump housing, 19 workload excessive and damaging.Preferably, first pump housing 19, second
The pump housing 20 and circulating pump 6 are positive displacement pump, are more advantageous to the material of transfer of highly viscous.
The reactor 1 is provided with pressure test table 21 for monitoring 1 pressure of reactor and for monitoring 1 temperature of reactor
The thermometer 22 of degree.
In the present embodiment, the internal pressure of the 21 immediately monitoring reactor 1 of pressure test table of setting, avoids pressure excessive
And temperature is excessive that reactor 1 is caused to burst；The internal temperature of the 22 immediately monitoring reactor 1 of thermometer of setting avoids reaction temperature
Height is spent, leads to that reaction efficiency is low and reaction conversion ratio is low.Further, the pressure test table 21 is set to reactor 1
Top, the thermometer 22 are set to the middle part of reactor 1, are more advantageous to monitoring pressure and temperature.
The top of the reactor 1 is communicated with for making the inside of reactor 1 form the vacuum-pumping tube 23 of vacuum and be used for
The nitrogen inlet duct 24 of nitrogen is filled with to reactor 1, the vacuum-pumping tube 23 is provided with the first control valve 25, the nitrogen air inlet
Pipe 24 is provided with the second control valve 26.
In the present embodiment, the ethylene oxide gas in confined space, air reaches 3% or more, and encountering open fire can send out
Raw detonation, therefore, 23 purpose of vacuum-pumping tube of setting is reactor 1 before being passed through ethylene oxide, and the air in reactor 1 is taken out
It walks until vacuum state, avoids causing reactor 1 to explode because being mixed into air in production process；Again via nitrogen inlet duct 24 to anti-
It answers device 1 to be filled with a large amount of nitrogen, eliminates the danger that ethylene oxide concentration reaches explosion limit, material is in a kind of dynamic always
Gas-liquid contact process avoids the possibility that autohemagglutination occurs for gas phase ethylene oxide.The first control valve 25 being arranged prevents from stopping taking out
Gas circulates in vacuum-pumping tube 23 under vacuumizing, and the second control valve 26 of setting prevents from stopping inputting nitrogen post-reactor 1
Gas backflow.
The ethoxylation equipment further includes the cooling trough 28 of superconducting pipe 27 and the heat for absorbing superconducting pipe 27,
One end of the superconducting pipe 27 is fixedly connected with reactor 1, and the bottom of cooling trough 28 is protruded into one end of the superconducting pipe 27.
By adopting the above technical scheme, the thermal energy on reactor 1 is transferred to the cooling water of cooling trough 28 by superconducting pipe 27,
Reach heat dissipation effect, the temperature for reducing reactor 1 slows down the heat exchange of external circulating system to reduce temperature of charge in reactor 1
The cooling workload of device 7 improves reaction efficiency.In the present embodiment, the superconducting pipe 27 includes hollow metallic conduit and appearance
Set on the actuation medium of hollow metallic conduit, the hollow portion of the hollow metallic conduit is vacuum state, and the actuation medium is
It is made of oxygen-free medium plus nano level metal particulate；The superconducting pipe 27 under high temperature environment, can enable actuation be situated between
Matter is done work in the both ends of hollow metallic conduit repeatedly, and thermal energy is taken out of and is radiated.
Above-described embodiment is the preferable implementation of the utility model, and in addition to this, the utility model can be with other sides
Formula realizes that any obvious replacement is in the protection model of the utility model without departing from the concept of the premise utility
Within enclosing.
Claims (9)
1. a kind of ethoxylation equipment for being used to prepare high-viscosity polymer, it is characterised in that: including reactor, ethylene oxide into
Expects pipe and the initiator feed pipe being connected to reactor, catalyst charge pipe, premixed device and external circulating system, the ring
Oxidative ethane feed pipe is connected to premixed device, and the external circulating system includes circulating pump and heat exchanger, the reactor, circulating pump,
Heat exchanger and premixed device are sequentially communicated, and the reactor is provided with the atomising device being connected to premixed device and for being stirred to react
The agitating device of device materials inside, the atomising device are located in the top of reactor.
2. a kind of ethoxylation equipment for being used to prepare high-viscosity polymer according to claim 1, it is characterised in that: institute
Stating atomising device includes material feed pipe and at least two atomizers, the feed inlet of the material feed pipe and premixed device
Discharge port connection, the feed inlet of each atomizer are connected to the discharge port of the material feed pipe.
3. a kind of ethoxylation equipment for being used to prepare high-viscosity polymer according to claim 1, it is characterised in that: institute
State agitating device include the driving motor for being set to reactor head, with driving motor transmission connection agitating shaft and it is multiple with
The stirring rod of axis connection is stirred, each stirring rod is provided with agitator arm far from one end of agitating shaft, and the agitating shaft is worn
In the top of the reactor, the stirring rod and agitator arm are located in reactor.
4. a kind of ethoxylation equipment for being used to prepare high-viscosity polymer according to claim 3, it is characterised in that: institute
The shape for stating agitator arm is S-shaped, and the both ends of the agitator arm are provided with the wedge-shaped edge of a knife.
5. a kind of ethoxylation equipment for being used to prepare high-viscosity polymer according to claim 1, it is characterised in that: institute
Stating external circulating system further includes the first regulating valve and the viscosimeter for monitoring reactor discharging viscosity, first regulating valve
Both ends be connected to respectively with circulating pump and heat exchanger, the viscosimeter is set between circulating pump and the first regulating valve, described to follow
Bypass has finished product discharge nozzle between ring pump and the first regulating valve, and the finished product discharge nozzle is provided with the second regulating valve.
6. a kind of ethoxylation equipment for being used to prepare high-viscosity polymer according to claim 1, it is characterised in that: institute
Stating external circulating system further includes first pump housing and second pump housing, the feed inlet of first pump housing and the feed inlet of second pump housing
It is connected to the discharge port of heat exchanger, the discharge port of first pump housing is connected to the feed inlet of premixed device, second pump housing
Discharge port be connected to the side wall of reactor.
7. a kind of ethoxylation equipment for being used to prepare high-viscosity polymer according to claim 1, it is characterised in that: institute
It states reactor and is provided with the pressure test table for monitoring reactor pressure and the thermometer for monitoring temperature of reactor.
8. a kind of ethoxylation equipment for being used to prepare high-viscosity polymer according to claim 1, it is characterised in that: institute
It states and is communicated at the top of reactor for making the inside of reactor form the vacuum-pumping tube of vacuum and for being filled with nitrogen to reactor
The nitrogen inlet duct of gas, the vacuum-pumping tube are provided with the first control valve, and the nitrogen inlet duct is provided with the second control valve.
9. a kind of ethoxylation equipment for being used to prepare high-viscosity polymer according to claim 1, it is characterised in that: institute
State the cooling trough that ethoxylation equipment further includes superconducting pipe and the heat for absorbing superconducting pipe, one end of the superconducting pipe
It is fixedly connected with reactor, the bottom of cooling trough is protruded into one end of the superconducting pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821747349.1U CN209155838U (en) | 2018-10-26 | 2018-10-26 | A kind of ethoxylation equipment being used to prepare high-viscosity polymer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821747349.1U CN209155838U (en) | 2018-10-26 | 2018-10-26 | A kind of ethoxylation equipment being used to prepare high-viscosity polymer |
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| CN209155838U true CN209155838U (en) | 2019-07-26 |
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| CN201821747349.1U Active CN209155838U (en) | 2018-10-26 | 2018-10-26 | A kind of ethoxylation equipment being used to prepare high-viscosity polymer |
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| CN110302736A (en) * | 2019-08-07 | 2019-10-08 | 上海蓝科石化环保科技股份有限公司 | Exchange heat polymerization reaction system and method in a kind of kettle for strongly exothermic polymerization reaction |
| CN111644126A (en) * | 2020-06-30 | 2020-09-11 | 江苏跃华石化工程有限公司 | Nitrogen recovery catalytic reaction system and nitrogen recovery catalytic reaction method |
| CN112973611A (en) * | 2021-02-19 | 2021-06-18 | 国家能源集团宁夏煤业有限责任公司 | Copolymerized polyformaldehyde synthesis device and copolymerized polyformaldehyde synthesis method |
| CN114832759A (en) * | 2022-04-27 | 2022-08-02 | 浙江皇马科技股份有限公司 | High molecular weight polyether and preparation method and system thereof |
| CN115055150A (en) * | 2022-08-04 | 2022-09-16 | 扬州务园再生资源有限公司 | Polyol and alcamines cement grinding aid processing equipment |
| CN115487754A (en) * | 2022-09-29 | 2022-12-20 | 宁波巨化化工科技有限公司 | Reactor suitable for acetone hydrogenation |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110302736A (en) * | 2019-08-07 | 2019-10-08 | 上海蓝科石化环保科技股份有限公司 | Exchange heat polymerization reaction system and method in a kind of kettle for strongly exothermic polymerization reaction |
| CN111644126A (en) * | 2020-06-30 | 2020-09-11 | 江苏跃华石化工程有限公司 | Nitrogen recovery catalytic reaction system and nitrogen recovery catalytic reaction method |
| CN111644126B (en) * | 2020-06-30 | 2024-03-01 | 江苏跃华石化工程有限公司 | Nitrogen recovery catalytic reaction system and nitrogen recovery catalytic reaction method |
| CN112973611A (en) * | 2021-02-19 | 2021-06-18 | 国家能源集团宁夏煤业有限责任公司 | Copolymerized polyformaldehyde synthesis device and copolymerized polyformaldehyde synthesis method |
| CN114832759A (en) * | 2022-04-27 | 2022-08-02 | 浙江皇马科技股份有限公司 | High molecular weight polyether and preparation method and system thereof |
| CN114832759B (en) * | 2022-04-27 | 2024-01-02 | 浙江皇马科技股份有限公司 | High molecular weight polyether and preparation method and system thereof |
| CN115055150A (en) * | 2022-08-04 | 2022-09-16 | 扬州务园再生资源有限公司 | Polyol and alcamines cement grinding aid processing equipment |
| CN115487754A (en) * | 2022-09-29 | 2022-12-20 | 宁波巨化化工科技有限公司 | Reactor suitable for acetone hydrogenation |
| CN115487754B (en) * | 2022-09-29 | 2024-04-02 | 宁波巨化化工科技有限公司 | Reactor suitable for acetone hydrogenation |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: An ethoxylation equipment for preparing high viscosity polymers Effective date of registration: 20230627 Granted publication date: 20190726 Pledgee: Bank of China Limited Wuhan Qingshan sub branch Pledgor: WUHAN OXIRAN SPECIALTY CHEMICALS Co. Registration number: Y2023420000252 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |