CN104437270A - Acrylic acid reaction system - Google Patents
Acrylic acid reaction system Download PDFInfo
- Publication number
- CN104437270A CN104437270A CN201410649124.2A CN201410649124A CN104437270A CN 104437270 A CN104437270 A CN 104437270A CN 201410649124 A CN201410649124 A CN 201410649124A CN 104437270 A CN104437270 A CN 104437270A
- Authority
- CN
- China
- Prior art keywords
- temperature
- acrylic acid
- molten salt
- oxidation reactor
- acid reaction
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/06—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds in tube reactors; the solid particles being arranged in tubes
- B01J8/067—Heating or cooling the reactor
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
- C07C51/16—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation
- C07C51/21—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen
- C07C51/25—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring
- C07C51/252—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of unsaturated compounds containing no six-membered aromatic ring of propene, butenes, acrolein or methacrolein
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2208/00—Processes carried out in the presence of solid particles; Reactors therefor
- B01J2208/00008—Controlling the process
- B01J2208/00017—Controlling the temperature
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention provides an acrylic acid reaction system which comprises an oxidation reactor (1) and at least one fused salt circulating pump (3), wherein the fused salt circulating pumps (3) are communicated with the oxidation reactor (1) by communicating pipelines, so that a fused salt circulation loop is formed; all the communicating pipelines are respectively provided with a temperature transmitter; the temperature transmitters are respectively and electrically connected with a temperature difference calculator (5) and a temperature average value calculator (6); the temperature difference calculator (5) and the temperature average value calculator (6) are respectively and electrically connected with a distributed control system (DCS). The invention aims at providing the acrylic acid reaction system which can be used for controlling the radial temperature of acrylic acid reaction.
Description
Technical field
The present invention relates to petrochemical industry, more specifically, relate to a kind of acrylic acid reaction system.
Background technology
Acrylic acid is a kind of important industrial chemicals, is widely used in the production of various chemicals and resin.Acrylic acid is obtained by propylene two-step oxidation, and the first step is that the oxygen in propylene and air generates methacrylaldehyde under the effect of oxidation catalyst, and second step is that methacrylaldehyde is oxidized to acrylic acid further.
Propylene oxidation reaction is carried out in calandria type fixed bed reactor, and filling oxidation catalyst in pipe, pipe outer (shell side) is hot melt salt.Reaction needs when starting to run the fused salt circulatory system, is reached the temperature of regulation by electric heater preheating catalyst bed; Because this course of reaction is the oxidation reaction of heat release, along with the carrying out of reaction can produce a large amount of reaction heat again, now need by regulating the fused salt circulatory system to remove heat, to control reactor batch temperature.The reaction heat that shell side fused salt is taken away, by heat exchanger with water heat exchange, produce steam.
The key equipment that acrylic acid is produced is oxidation reactor, and reaction temperature, and especially the control of radial temperature is the key that whole course of reaction controls, and more can embody advance and accuracy that set of device controls automatically.
Summary of the invention
For Problems existing in correlation technique, the object of the present invention is to provide a kind of acrylic acid reaction system that can control the radial temperature of acrylic acid reaction.
For achieving the above object, the invention provides a kind of acrylic acid reaction system, comprise oxidation reactor and at least one molten salt circulating pump, molten salt circulating pump is communicated with to form fused salt closed circuit by connecting pipe with oxidation reactor, each connecting pipe is provided with temperature transmitter, all temperature transmitters are electrically connected with temperature difference exerciser and temperature averages exerciser respectively, and temperature difference exerciser and temperature averages exerciser are electrically connected with DCS control system respectively.
According to the present invention, connecting pipe comprises the first radial passage and the second radial passage, and wherein, the entrance and exit of molten salt circulating pump is communicated with oxidation reactor with the second radial passage respectively by the first radial passage, wherein, temperature transmitter is arranged on the second radial passage.
According to the present invention, acrylic acid reaction system has two molten salt circulating pumps, and wherein, these two molten salt circulating pumps are arranged on the outside of oxidation reactor with the form be mutually symmetrical relative to oxidation reactor.
According to the present invention, the second radial passage that any one molten salt circulating pump in these two molten salt circulating pumps is communicated with oxidation reactor is provided with the first temperature transmitter, the second radial passage that another molten salt circulating pump is communicated with oxidation reactor is provided with the second temperature transmitter.
According to the present invention, this reaction system also comprises electric heater and cooler, and wherein, the outlet of electric heater is communicated with molten salt circulating pump respectively with the entrance of cooler.
According to the present invention, temperature difference exerciser and temperature averages exerciser are electrically connected with the interlock alarm of DCS control system respectively.
According to the present invention, interlock alarm is the interlock alarm with acoustic-optic alarm.
Advantageous Effects of the present invention is:
In acrylic acid reaction system of the present invention, is provided with temperature transmitter in the connecting pipe that molten salt circulating pump is connected with oxidation reactor, native system also has the temperature difference exerciser and temperature averages exerciser that are connected with DCS control system in addition.By being electrically connected with temperature difference exerciser and temperature averages exerciser respectively by temperature transmitter, utilize the interlock alarm system that temperature difference exerciser is resulted in feeding DCS; According to different technologies and catalyst parameters, setup control desired temperature in dcs, temperature averages exerciser results in and again carries out temperature difference calculation with the control temperature setting value that inputs in DCS, and its temperature difference results in the same interlock alarm system sent in DCS.Be no matter that the temperature difference that the temperature difference has exceeded the control temperature setting value inputted in the scope or temperature averages and DCS allowed has exceeded the scope allowed, all will carry out sound and light alarm and stop in emergency.Therefore, reaction system of the present invention can ensure the accurate control of oxidation reactor radial temperature, ensures the even running of reaction.
Accompanying drawing explanation
Fig. 1 is the structural representation of acrylic acid reaction system of the present invention.
Detailed description of the invention
Referring now to Fig. 1, acrylic acid reaction system of the present invention is described.
In acrylic acid reaction system of the present invention, it comprises oxidation reactor 1, heater 2, at least one molten salt circulating pump 3 and cooler 4.Wherein, be communicated with between molten salt circulating pump 3 with oxidation reactor 1 by connecting pipe, to form fused salt closed circuit, the outlet of heater 2 is communicated with molten salt circulating pump 3 respectively with the entrance of cooler 4.
Specifically, for acrylic acid reaction, propylene needs certain heat when oxidation reaction starts, so first heat fused salt in heater 2, utilizes the fused salt after heating to provide heat for acrylic acid oxidation reaction.After fused salt is heated by heater 2, send into molten salt circulating pump 3 and make fused salt circulate in systems in which simultaneously, and make the beds in oxidation reactor 1 reach the temperature of regulation.Then, a large amount of heats can be produced when oxidation reaction is carried out, the fused salt of these heats through heat exchange transmission and in the outer shell side of heating tube, be again admitted to cooler 4 through molten salt circulating pump 3 by the fused salt that heats.In cooler 4, by fused salt and desalted water heat exchange, thus produce steam to be removed by heat.
The above basic procedure for acrylic acid reaction and step, those skilled in the art can expect suitably setting the temperature needed for above steps, pressure by above-mentioned steps.Further, under the prerequisite not exceeding scope, those skilled in the art can expect other suitably additional steps and suitably replace the order of above-mentioned steps.Therefore, the above can not form restriction to the present invention, and above-mentioned setting and selection can be determined according to concrete service condition, and the present invention is not limited to this.
Further, continue with reference to Fig. 1, in a preferred embodiment, the connecting pipe be connected with oxidation reactor 1 by molten salt circulating pump 3 can be provided with temperature transmitter, and all temperature transmitters are electrically connected with temperature exerciser 5 and temperature averages exerciser 6 respectively.More specifically, temperature exerciser 5 and temperature averages exerciser 6 are electrically connected to DCS (dcs) control system respectively.
Specifically, by being electrically connected with temperature difference exerciser 5 and temperature averages exerciser 6 respectively by temperature transmitter, that is, temperature difference exerciser 5 and temperature averages exerciser 6 are electrically connected with the interlock alarm of DCS control system respectively.In a preferred embodiment, interlock alarm is the interlock alarm with acoustic-optic alarm, that is, interlock alarm can send warning with the form of sound and light alarm.
Utilize the interlock alarm system that temperature difference exerciser 5 is resulted in feeding DCS; In addition, according to different technologies and catalyst parameters, setup control desired temperature in dcs, temperature averages exerciser 6 results in and again carries out temperature difference calculation with the above-mentioned control temperature setting value that inputs in DCS, and its temperature difference results in the same interlock alarm system sent in DCS.Be no matter that the temperature difference that the temperature difference has exceeded the control temperature setting value inputted in the scope or temperature averages and DCS allowed has exceeded the scope allowed, all will carry out sound and light alarm and stop in emergency.Therefore, reaction system of the present invention can ensure the accurate control of oxidation reactor 1 radial temperature, ensures the even running of reaction.The concrete operations of the above process will be described in detail following.
Continue with reference to Fig. 1, in a preferred embodiment, above-mentioned connecting pipe comprises the first radial passage I and the second radial passage II.Wherein, the entrance and exit of molten salt circulating pump 3 is communicated with oxidation reactor 1 with the second radial passage II respectively by the first radial passage I, and temperature transmitter is arranged on the second radial passage II.As shown by arrows in FIG., flow out through the first radial passage I after fused salt absorbs heat in oxidation reactor 1 and deliver to molten salt circulating pump 3, being returned in oxidation reactor 1 by the second radial passage II again after cooling down.In a preferred embodiment, the first above-mentioned radial passage I and the second radial passage II is parallel to each other and all perpendicular to the passage of the horizontal-extending of oxidation reactor 1 sidewall.Due to the reaction temperature in acrylic acid course of reaction, especially the control of radial temperature is the key that whole course of reaction controls, therefore temperature transmitter is arranged on the second radial passage II by the present invention, namely be that Monitoring and Controlling is carried out to the radial temperature at the second radial passage II place, thus can precisely control the radial temperature of oxidation reactor 1 further, to ensure the even running of reacting.
Particularly, as shown in Figure 1, in an optional embodiment, acrylic acid reaction system can have two molten salt circulating pumps 3, and these two molten salt circulating pumps 3 are arranged on the outside of oxidation reactor 1 with the form be mutually symmetrical relative to oxidation reactor 1, that is, centered by oxidation reactor 1, these two molten salt circulating pumps 3 are arranged in specular each other.Further, arrange the first temperature transmitter in the second radial passage II that any one molten salt circulating pump in these two molten salt circulating pumps 3 is communicated with oxidation reactor 1, this first temperature transmitter illustrates with TI-1A in FIG; And the second radial passage II that another molten salt circulating pump in these two molten salt circulating pumps 3 is communicated with oxidation reactor 1 is provided with the second temperature transmitter, this second temperature transmitter illustrates with TI-1B in FIG.
In conjunction with embodiment illustrated in fig. 1, the operating process of present system in actual motion is described.The oxidation reaction initial stage is carried out or when oxidation reactor 1 stops charging keeping during temperature at oxidation reactor 1, first by being connected the operation of the molten salt circulating pump 3 forming fused salt closed circuit with oxidation reactor 1, the temperature of beds in oxidation reactor 1 is regulated, temperature required to reach oxidation reaction.In this process, heater 2 pairs of fused salts are utilized to heat to control temperature of molten salt.Such as, in an alternate embodiment of the invention, fused salt can be heated to 335 DEG C by heater 2, and maintains this reaction temperature.
During propylene and oxygen carry out chemical reaction and produce a large amount of heat of reaction, need to regulate salt melting system heat of reaction to be removed thus to keep the temperature in oxidation reactor 1.Now, shifted out reacting liberated heat in oxidation reactor 1 via molten heat transfer salt by molten salt circulating pump 3, and send into cooler 4 and carry out heat exchange with desalted water, thus produce the saturated vapor of 1.8MpaG and reclaim heat energy.
That be thermocouple in the embodiment shown, carry out temperature for measuring reactor fused salt two temperature transmitter TI-1A and TI-1B are arranged on the radial fused salt pipeline of oxidation reactor 1 both sides respectively, that is, on two second radial passage II.Utilize these two thermocouples to carry out temperature difference instruction, that is, realized by temperature exerciser 5, setting simultaneously when these two thermoelectric reach ± 2 DEG C time carry out reporting to the police, when the temperature difference reach ± 3 DEG C time interlock.
In addition, these two thermocouples indicate except carrying out the temperature difference value instruction that is also averaged, that is, realized by temperature averages exerciser 6.Specifically, user can according to different process technology and catalyst parameters setup control desired temperature in DCS system, the above-mentioned control temperature setting value inputted in result and DCS system is indicated again to carry out differential thermal calculation by the mean value monitored, setting mean value and the temperature difference of control temperature setting value reach ± 2 DEG C of alarms, the temperature difference reaches ± 3 DEG C time interlocking.
Thus, the present invention by above twice temperature difference instruction (namely, the first time temperature difference instruction realized by temperature exerciser 5 and second temperature difference realized by temperature averages exerciser 6 indicate) and corresponding warning interlocking measure is (namely, the interlock alarming device of DCS system), thus ensure that the accurate temperature of oxidation reactor radial temperature controls, and the even running of reactor can be ensured.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. an acrylic acid reaction system, comprise oxidation reactor (1) and at least one molten salt circulating pump (3), described molten salt circulating pump (3) is communicated with to form fused salt closed circuit by connecting pipe with described oxidation reactor (1), it is characterized in that
Each described connecting pipe is provided with temperature transmitter, all described temperature transmitters are electrically connected with temperature difference exerciser (5) and temperature averages exerciser (6) respectively, and described temperature difference exerciser (5) and described temperature averages exerciser (6) are electrically connected with DCS control system respectively.
2. acrylic acid reaction system according to claim 1, is characterized in that,
Described connecting pipe comprises the first radial passage (I) and the second radial passage (II),
Wherein, the entrance and exit of described molten salt circulating pump (3) is communicated with described oxidation reactor (1) with described second radial passage (II) respectively by described first radial passage (I),
Wherein, described temperature transmitter is arranged on described second radial passage (II).
3. acrylic acid reaction system according to claim 1, is characterized in that,
Described acrylic acid reaction system has two described molten salt circulating pumps (3),
Wherein, two described molten salt circulating pumps (3) are arranged on the outside of described oxidation reactor (1) with the form be mutually symmetrical relative to described oxidation reactor (1).
4., according to the acrylic acid reaction system shown in claim 3, it is characterized in that,
The second radial passage (II) that any one molten salt circulating pump in two described molten salt circulating pumps (3) is communicated with described oxidation reactor (1) is provided with the first temperature transmitter, the second radial passage (II) that another molten salt circulating pump is communicated with described oxidation reactor (1) is provided with the second temperature transmitter.
5. the acrylic acid reaction system according to any one of claim 1-4, is characterized in that, also comprises electric heater (2) and cooler (4),
Wherein, the outlet of described electric heater (2) is communicated with described molten salt circulating pump (3) respectively with the entrance of described cooler (4).
6. the acrylic acid reaction system according to any one of claim 1-4, is characterized in that,
Described temperature difference exerciser (5) and described temperature averages exerciser (6) are electrically connected with the interlock alarm of described DCS control system respectively.
7. acrylic acid reaction system according to claim 6, is characterized in that,
Described interlock alarm is the interlock alarm with acoustic-optic alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410649124.2A CN104437270B (en) | 2014-11-14 | 2014-11-14 | Acrylic acid reaction system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410649124.2A CN104437270B (en) | 2014-11-14 | 2014-11-14 | Acrylic acid reaction system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104437270A true CN104437270A (en) | 2015-03-25 |
| CN104437270B CN104437270B (en) | 2017-06-09 |
Family
ID=52884482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410649124.2A Active CN104437270B (en) | 2014-11-14 | 2014-11-14 | Acrylic acid reaction system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104437270B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110142007A (en) * | 2019-05-21 | 2019-08-20 | 宁波浙铁江宁化工有限公司 | Cis-butenedioic anhydride prepares the fused salt loop structure in reactor |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080025879A1 (en) * | 2004-05-27 | 2008-01-31 | Mitsubishi Chemical Corporation | Reactor, Reactor Control System, And Catalytic Gas Phase Oxidation Reaction Method |
| CN101149616A (en) * | 2007-10-29 | 2008-03-26 | 中国石油集团工程设计有限责任公司东北分公司 | Propylene oxidation unit DCS control system in crylic acid device |
| CN201156197Y (en) * | 2007-10-29 | 2008-11-26 | 中国石油集团工程设计有限责任公司东北分公司 | Propylene oxidation unit automatic control system in acroleic acid production |
| CN203209035U (en) * | 2013-03-26 | 2013-09-25 | 中国石油集团东北炼化工程有限公司吉林设计院 | Automatic control system for removing heat of molten salt in reactor capable of producing acrylic acid through propane one-step process |
| CN203217389U (en) * | 2013-04-07 | 2013-09-25 | 中国石油集团东北炼化工程有限公司吉林设计院 | Control system of reactor for preparing acrylic acid with propane through one-step method |
| CN103537243A (en) * | 2013-10-30 | 2014-01-29 | 天津市化工设计院 | Device and method for removing reaction heat in acrolein oxidation |
| CN204294210U (en) * | 2014-11-14 | 2015-04-29 | 中国石油集团东北炼化工程有限公司吉林设计院 | Vinylformic acid reactive system |
-
2014
- 2014-11-14 CN CN201410649124.2A patent/CN104437270B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080025879A1 (en) * | 2004-05-27 | 2008-01-31 | Mitsubishi Chemical Corporation | Reactor, Reactor Control System, And Catalytic Gas Phase Oxidation Reaction Method |
| CN101149616A (en) * | 2007-10-29 | 2008-03-26 | 中国石油集团工程设计有限责任公司东北分公司 | Propylene oxidation unit DCS control system in crylic acid device |
| CN201156197Y (en) * | 2007-10-29 | 2008-11-26 | 中国石油集团工程设计有限责任公司东北分公司 | Propylene oxidation unit automatic control system in acroleic acid production |
| CN203209035U (en) * | 2013-03-26 | 2013-09-25 | 中国石油集团东北炼化工程有限公司吉林设计院 | Automatic control system for removing heat of molten salt in reactor capable of producing acrylic acid through propane one-step process |
| CN203217389U (en) * | 2013-04-07 | 2013-09-25 | 中国石油集团东北炼化工程有限公司吉林设计院 | Control system of reactor for preparing acrylic acid with propane through one-step method |
| CN103537243A (en) * | 2013-10-30 | 2014-01-29 | 天津市化工设计院 | Device and method for removing reaction heat in acrolein oxidation |
| CN204294210U (en) * | 2014-11-14 | 2015-04-29 | 中国石油集团东北炼化工程有限公司吉林设计院 | Vinylformic acid reactive system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110142007A (en) * | 2019-05-21 | 2019-08-20 | 宁波浙铁江宁化工有限公司 | Cis-butenedioic anhydride prepares the fused salt loop structure in reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104437270B (en) | 2017-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204294210U (en) | Vinylformic acid reactive system | |
| GB2588728A8 (en) | Ribbed tubeless heat exchanger for fliud heating systems including a rib component and methods of manufacture thereof | |
| TWI747852B (en) | Device for carrying out a chemical reaction by a continuous method | |
| CN203209035U (en) | Automatic control system for removing heat of molten salt in reactor capable of producing acrylic acid through propane one-step process | |
| CN104199479A (en) | Stepless temperature control system | |
| JOP20210088A1 (en) | Power plant | |
| CN103402565A (en) | Device for heating a medical liquid | |
| CN104437270A (en) | Acrylic acid reaction system | |
| CN103933916A (en) | Heating-cooling method and heating-cooling system utilizing fused salt as carrier | |
| CN101960239B (en) | Heat exchanging device | |
| CN210570205U (en) | Reactor system for accurately controlling thermal reaction temperature | |
| CN203874765U (en) | Heating and cooling system taking fused salt as heat carrier | |
| KR101147926B1 (en) | Heating and cooling cycle isolated type temperature control apparatus for chemical reactor | |
| EP0064867B1 (en) | Apparatus and method for the heat treatment of materials | |
| CN208529524U (en) | A kind of safe high-precision serials control temperature controller | |
| CN109932899A (en) | The optimal control method and system of reaction temperature in chemical products production | |
| JP5037054B2 (en) | Reactor | |
| CN104279913B (en) | Numeral temperature control heat-exchanger rig | |
| CN204393272U (en) | A kind of thickness flavouring on-line continuous cooking device | |
| KR101135468B1 (en) | A heating and cooling exchange apparatus and controlling method for the chemical reactor | |
| CN106010645A (en) | Method for producing chlorinated paraffin-70 in light chlorination direct propelling gas cold-heat mode | |
| CN104489881B (en) | A kind of sticky material on-line continuous heater | |
| CN204142092U (en) | Numeral temperature control heat-exchanger rig | |
| CN205007950U (en) | Improve ethylene chlorate polymeric kettle temperature control accuracy's device | |
| RU2017100551A (en) | INSTALLATION AND METHOD FOR CARRYING OUT HETEROGENEOUS CATALYTIC GAS-PHASE REACTIONS |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200927 Address after: 132002 3-6 and 9-13 floors of Block A, Jihua Economic and Trade Center, Tongtan Road, Changyi District, Jilin Province Patentee after: PetroChina Jilin Chemical Engineering Co.,Ltd. Address before: 132002, Jilin, Jilin Province tung Chi Road East Economic and Trade Building Patentee before: JILIN DESIGNING INSTITUTE OF CNPC NORTHEAST REFINING & CHEMICAL ENGINEERING Co.,Ltd. |
|
| TR01 | Transfer of patent right |