WO2005115606A1 - 反応装置、反応装置制御システム、及び接触気相酸化反応方法 - Google Patents
反応装置、反応装置制御システム、及び接触気相酸化反応方法 Download PDFInfo
- Publication number
- WO2005115606A1 WO2005115606A1 PCT/JP2004/018231 JP2004018231W WO2005115606A1 WO 2005115606 A1 WO2005115606 A1 WO 2005115606A1 JP 2004018231 W JP2004018231 W JP 2004018231W WO 2005115606 A1 WO2005115606 A1 WO 2005115606A1
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- Prior art keywords
- heat medium
- reactor
- shell
- temperature
- cooled
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Classifications
-
- 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
- C07C51/215—Preparation of carboxylic acids or their salts, halides or anhydrides by oxidation with molecular oxygen of saturated hydrocarbyl groups
-
- 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
- B01J2208/00026—Controlling or regulating the heat exchange system
- B01J2208/00035—Controlling or regulating the heat exchange system involving measured parameters
- B01J2208/00044—Temperature measurement
- B01J2208/00053—Temperature measurement of the heat exchange medium
-
- 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
- B01J2208/00106—Controlling the temperature by indirect heat exchange
- B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
- B01J2208/00212—Plates; Jackets; Cylinders
-
- 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
- B01J2208/00106—Controlling the temperature by indirect heat exchange
- B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
- B01J2208/00212—Plates; Jackets; Cylinders
- B01J2208/00221—Plates; Jackets; Cylinders comprising baffles for guiding the flow of the heat exchange medium
-
- 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
- B01J2208/00106—Controlling the temperature by indirect heat exchange
- B01J2208/00168—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles
- B01J2208/00256—Controlling the temperature by indirect heat exchange with heat exchange elements outside the bed of solid particles in a heat exchanger for the heat exchange medium separate from the reactor
Definitions
- the present invention relates to a multitubular reactor capable of suppressing a temperature change of a heating medium and quickly stabilizing a temperature variation, and capable of suitably performing a reaction, and a control system therefor.
- a multitubular reactor capable of suppressing a temperature change of a heating medium and quickly stabilizing a temperature variation, and capable of suitably performing a reaction, and a control system therefor.
- a multitubular reactor has been used for producing a compound by a catalytic gas phase oxidation method (for example, Japanese Patent Application Laid-Open No. — See Publication No. 2 679 9).
- An ordinary multitubular reactor has a plurality of reaction tubes filled with a catalyst and a plurality of openings having openings for distributing the heat medium introduced into the shell throughout the shell in the shell of the reactor. It has a structure in which a baffle plate is installed. In general, the temperature of the heat medium flowing in the shell is detected, and based on the detection result, the operation of the multitubular reactor is controlled while uniformly controlling the temperature of the heat medium in the shell. is there.
- a part of the heat medium is taken out of the reactor and cooled so that the heat medium temperature at a specific measurement point, for example, the outlet of the heat medium circulation pump, becomes constant. It is common practice to return the reactor to the reactor. At this time, it is necessary to control the external circulation flow rate of the heat medium if the cooling load is constant, and to control the cooling load of the heat medium if the external circulation flow rate is constant.
- the catalytic gas phase oxidation reaction as described above is generally a reaction that generates a large amount of heat, when the external circulation amount is changed, the reaction temperature increases when the circulation amount is reduced. If the temperature rises, there is a problem that a runaway reaction may be caused due to insufficient cooling, or the life of the catalyst may be shortened due to generation of hot spots.
- the amount of cooling water in the heat exchanger changes according to the instruction of the temperature control instrument, the change is transmitted to the heat medium, and the heat medium is sent to the heat medium circulation pump, and the measurement point is changed.
- the control is performed through many stages, the control time is likely to be delayed, and the actual temperature will change beyond the set temperature. There is a problem.
- An object of the present invention is to solve the above-mentioned conventional problems, suppress a temperature change of a heating medium, and quickly settle temperature fluctuations, thereby enabling a multitubular reactor capable of performing a suitable reaction, and A multi-tube reactor which can be suitably applied to a catalytic gas-phase oxidation reaction such as when producing (meth) acrylic acid or the like from propane, propylene or isobutylene; and It is to provide a control system.
- the present invention provides the following reactor, reactor control system, and catalytic gas phase oxidation reaction method.
- a shell-and-tube reactor provided in the shell and filled with a catalyst and filled with a catalyst, and a shell-and-tube reactor in which a heat medium flows through the shell; and heat is supplied to the outside of the reactor.
- a reactor having a cooling device for a medium, wherein at least a part of the heat medium taken out of the shell is firstly cooled, and a part of the firstly cooled heat medium is secondarily cooled.
- the flow rate of the secondary-cooled heat medium is determined based on at least one temperature selected from the shell-side heat medium temperature and the catalyst temperature;
- a reactor control characterized by adjusting the temperature of the heat medium circulated in the shell by adjusting the flow rate of the heat medium cooled in the primary cooling and the remaining flow not subjected to the secondary cooling. Your system.
- a flow control valve provided in a line for performing a step of secondary cooling at least a part of the heat medium cooled primarily, and secondary cooling.
- the reactor control system according to the above (2), wherein a flow control valve provided on a line of the primary-cooled heat medium to be bypassed without being subjected to a process is operated in a reverse direction.
- the reactor described in (1) above is used to perform a catalytic gas phase oxidation reaction by controlling the temperature of the reactor by the reactor control system described in (2) and (3). Catalytic gas phase oxidation reaction method.
- a multitubular reactor having a shell, a plurality of reaction tubes provided in the shell and filled with a catalyst, and a heat medium flowing through the shell, and an exterior of the reactor
- a system for controlling a reactor having at least one cooling device for the heat medium, the system being provided on a line for supplying at least a part of the heat medium taken out of the shell to the cooling device for the heat medium.
- the temperature of the heat medium circulated in the shell is adjusted by using a flow control valve that is provided and a flow control valve that is provided in a heat medium line that is bypassed without being supplied to the heat medium cooling device.
- Reactor control system Reactor control system.
- the essential point of the reaction apparatus of the present invention is that the heat medium taken out of the shell is cooled to a reference temperature and cooled, and a part of the heat medium cooled to the reference temperature is reduced (by reducing the flow rate to reduce the temperature).
- This method is characterized by mixing the heat medium cooled further down to the standard temperature and the heat medium further cooled down under good temperature control.
- highly accurate temperature control of the heat medium can be performed.
- (meth) acrylic acid from propane, propylene or isobutylene the precision required for temperature control is generally 0.2 to 1 ° C. It is somewhat difficult to control the temperature with this accuracy by cooling, but the device of the present invention makes it possible to control this accuracy.
- FIG. 1 is an example of the reaction apparatus and the temperature control system of the heating medium of the present invention.
- FIG. 3 is a conceptual diagram of a heat medium flow control preferably performed in the present invention,
- FIG. 3 is a conceptual diagram of a generally performed split control,
- FIG. 4 is operation data in the first embodiment, and
- FIG. 6 shows the operation data in the third embodiment, and
- FIG. 7 shows the operation data in the fourth embodiment.
- 1 is a shell
- 2 is a circulation pump
- 3 and 4 are heat exchangers
- 5 is a temperature control instrument (TC)
- 6 is an A valve
- 7 is a B valve
- L1 is a conduit
- L 2 Is a discharge pipe
- L3 is a discharge pipe
- L4 is a circulation flow path
- L5 is a circulation flow path
- L6 is a heat medium supply pipe
- L7 is a conduit.
- FIG. 1 shows an example of the reactor of the present invention.
- reference numeral 1 denotes a shell of a multitubular reactor in which a plurality of reaction tubes (not shown) filled with a catalyst are provided in both a lower tube sheet and an upper tube sheet (not shown). The interior is fixed by.
- inlets and outlets (not shown) for the source gas for the reaction, and the source gas flows up or down in the reaction tube in the flow direction.
- the flow direction of the source gas is not particularly limited, but an upward flow is more preferable.
- the shell 1 is provided with a conduit L7 for introducing a heat medium, and the heat medium pressurized by the circulation pump 2 is introduced into the shell 1 from the conduit L7.
- the heat medium introduced into the shell 1 rises while changing the flow direction due to the baffle plate inside the shell 1, and during this time, the heat medium comes into contact with the outer surface of the reaction tube and takes the reaction heat. After that, it returns to the circulation pump 2 through the conduit L1 provided in the shell 1.
- a valve 6 low-temperature heat medium control valve
- B valve 7 high-temperature heat medium control valve
- the A valve 6 and the B valve 7 operate in opposite directions. That is, in the control system (left figure) of the temperature control instrument (TC) 5 and the A valve 6 and the B valve 7 shown in Fig. 2 (left figure) and the output vs. valve opening degree diagram (right figure), As shown in the valve opening relationship diagram, it is preferable that the opening and closing operations of the A valve 6 and the B valve 7 be operated in the opposite direction to the control output of the TC.
- a single control output drives multiple (usually two) control valves, but what is commonly performed is what is called split control (see Fig. 3).
- split control There are two types of control methods, one is V-characteristic control (see Fig. 3 (a); combining valves with opposite characteristics), and the other is parallel-characteristic control (Fig. 3 ( b) See; Combine valves with the same characteristics).
- the present invention attempts to control the temperature by controlling the flow rates of two types of fluids having the opposite properties of high temperature and low temperature, and in such a case, generally, FIG.
- the V characteristic control of a) is performed.
- the catalytic gas phase oxidation reaction targeted by the present invention is a reaction that generates a large amount of heat, and therefore, when the control output is around 50% and the circulation amount of the heat medium is reduced, the reaction temperature is increased. If the temperature rises, a runaway reaction may occur due to insufficient cooling or a catalyst may be generated due to the generation of hot spots. The service life may be shortened.
- control method of the present invention shown in FIG. 2 does not change the circulation amount of the heat medium, so that it can quickly follow the change in the reaction temperature.
- the feature is that setting is quick.
- the input is the reactor temperature, as the control instrument used in the present invention aims to keep the reaction temperature stable.
- the reactor temperature varies depending on the flow rate of the raw material gas and the heat medium, the difference in the charged state of the catalyst, or the position of the measurement point, in many cases, the specific measurement point is controlled as a representative.
- the temperature measurement position of the reactor either the catalyst medium in the shell side heat medium or the catalyst packed bed in the reaction tube, or both are selected.
- the temperature of the shell-side heat medium it is generally effective to refer to the outlet L7 or the inlet L1 of the circulating pump 2, and it is also effective to refer to the temperature in the shell or the circulation paths L2 to L6.
- the temperature of the catalyst packed bed in the reaction tube it is better to measure the temperature of multiple reaction tubes rather than a single measurement point, and measure the temperature distribution in the direction of the tube axis of the reaction tube. It is preferable to change the measurement position (distance from the inlet of the reaction tube) so that the measurement can be performed.
- the reactor temperature is settled by controlling the opening of valves A and B by feedback control using a normal PID control instrument.
- Any valve used to control the flow rate in the present invention can be used without any problem as long as the flow rate can be continuously changed between the closed state and the open state, such as a one-port valve and a butterfly valve. be able to.
- any known heat medium in a multitubular reactor can be appropriately selected and used as necessary.
- a mixture of inorganic salts such as nitrite or phenyl ether-based organic liquid can be used. It is possible to suitably apply the reactor control system of the present invention to a case where a high-temperature heating medium, in which a control valve is liable to malfunction, such as a control valve, is used. it can.
- composition of niter 53 wt% of KN0 3 (potassium nitrate), 40 wt% of NaN0 2 (sodium nitrite) ⁇ Pi 7 wt% of NaN0 3 (sodium nitrate).
- Other weight compositions will change the melting point of the mixture.
- the composition of a night game and its tolerance range depend on the temperature conditions in which it is used.
- KN0 3 (nitrate force helium), NaN0 2 in the (sodium nitrite) and NaN0 3 (nitric acid sodium), each purity of 95 wt. It is preferable to use industrial products of / 0 or more. If the purity is less than 9 5% by weight, countercurrent force s time ⁇ deviations increases the melting point designed as the mixture.
- the multitubular reactor itself has a shell and a plurality of reaction tubes provided in the shell and filled with a catalyst, and the heat medium flows through the shell. If so, a well-known multitubular reactor can be appropriately used.
- the present invention does not limit the reaction to be applied.
- catalytic gas-phase oxidation which generates a large amount of heat, such as the production of (meth) acrylic acid from bun, propylene or isobutylene, etc. Suitable for reaction.
- a composite compound having the following composition formula was used as a catalyst.
- composition formula (The subscripts in the composition formula are the composition (atomic ratio) of the constituent elements, and the oxygen composition X is a value determined by the oxidation state of each metal).
- the composite compound of the above composition formula was produced according to JP-A-63-54942 to obtain a powdery catalyst.
- the catalyst powder was formed into a ring having an outer diameter of 5 mm, an inner diameter of 2 ⁇ , and a height of 4 mm.
- a stainless steel reaction tube 10 with a length of 3,500 mm and an inner diameter of 25.4 mm A multitubular reactor having 0.00 and a shell with an inner diameter of 4,500 mm was used. On the shell side of this reactor, disk-shaped and donut-shaped baffles with an opening ratio of 18% are installed alternately at equal intervals.
- Each reaction tube was filled with 1.5 L of the above catalyst, and a propylene concentration of 9% by volume and a molecular oxygen of 14.5 volumes were set from the lower part of the reactor at a gauge pressure of 75 kPa. /. , 9 vol% water, was supplied with nitrogen 6 7. 5 vol 0/0 of the raw material gas.
- the temperature of the heating medium was adjusted based on FIG.
- a heat medium a molten salt night game of a nitrate mixture having the above composition was used.
- the heat medium was circulated by the circulation pump 2, and the circulation flow rate was adjusted so that the temperature difference between the outlet and the inlet of the shell 1 was 4 ° C.
- the input signal of the PID temperature control instrument (TC) 5 for controlling the temperature of the reaction was taken from a temperature detector (not shown) installed at the outlet pipe L7 of the circulation pump 2.
- the A valve 6 and the B valve 7 were operated in the opposite directions to the output of TC as shown in FIG.
- the feed amount of the raw material and the air temperature were simultaneously measured together with the input signal of the TC, and feed feed control for calculating the control output MV of the TC based on these input values was performed.
- the operating load was increased by 2.4% over 20 minutes.
- the temperature of the heating medium (P V) hardly changed.
- the response of TC at this time is shown in FIG. In Figs. 4 to 7, the operation load is shown as the ratio (%) of the feed amount at the time of the implementation to the upper limit of the raw material feed amount.
- Example 2 The procedure was performed in the same manner as in Example 1 except that the correction based on the feed amount of the raw material and the air temperature was weakened (the weight of the influence strength was reduced). The operation was mainly performed by feedback control based on the measured values of the heating medium temperature. In addition to changing the operation load, 30 minutes later, the SV was raised by 0.5 ° C to adjust the reaction temperature.Therefore, a fluctuation of about 1 occurred in, but it converged within 200 minutes and SV The ability to follow changes was also good.
- Figure 5 shows the TC response at this time.
- Example 1 was carried out in the same manner as in Example 1 except that the correction was not performed based on the feed amount of the raw material and the air temperature, and only the feedback control was performed based on the measured value of the heat medium temperature input to TC. 30 minutes after changing the operating mode, the SV was raised by 0.5 ° C to adjust the reaction temperature.Therefore, the PV fluctuated by about 1.3 ° C. The ability to follow changes was also good.
- Figure 6 shows the response of the TC at this time.
- Example 2 The same operation as in Example 1 was performed, except that only the B valve was controlled by the output of the TC, and the opening of the A valve was fixed at 50%. TC was operated only by feedback control based on the measured temperature of the heating medium. The SV was not changed when the operating load was changed, but the PV fluctuated by about 3 ° C, and it took about 400 minutes to converge. The response of TC at this time is shown in FIG. Since the opening control of the A valve is not performed, the control stability is inferior to those of Examples 1 to 3. However, it can be seen that the temperature control method of the present embodiment has enabled stable temperature control.
- the multitubular reactor and its control system of the present invention are applied to the production of (meth) acrylic acid from propane, propylene or isobutylene by catalytic gas phase oxidation, when the supply amount of raw materials is changed, Temperature change of the heating medium even when the conditions are changed, and the temperature fluctuation can be settled quickly, preventing runaway reaction or early deterioration of the catalyst, and stably producing high yield over a long period of time. can do.
- the temperature control required for the production of (meth) acrylic acid from propane, propylene or isobutylene is generally required to be performed at a temperature of 0.2 to 1 ° C, and the temperature of the heat medium circulated in large quantities is reduced by one step. It is very difficult to control the temperature with this accuracy by cooling, but the heat medium taken out of the shell is once cooled to the target temperature, and part of the heat medium cooled to the target temperature is further cooled. Then, by using the reactor of the present invention that mixes the heat medium cooled to the standard temperature with the heat medium further cooled under good temperature control, high-precision temperature control of the heat medium is performed. Can be performed.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/597,822 US7811524B2 (en) | 2004-05-27 | 2004-12-01 | Reactor, reactor control system, and catalytic gas phase oxidation reaction method |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2004158036A JP4742520B2 (ja) | 2004-05-27 | 2004-05-27 | 反応装置、反応装置制御システム、及び接触気相酸化反応方法 |
| JP2004-158036 | 2004-05-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2005115606A1 true WO2005115606A1 (ja) | 2005-12-08 |
Family
ID=35350096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/018231 Ceased WO2005115606A1 (ja) | 2004-05-27 | 2004-12-01 | 反応装置、反応装置制御システム、及び接触気相酸化反応方法 |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US7811524B2 (ja) |
| JP (1) | JP4742520B2 (ja) |
| CN (1) | CN100531888C (ja) |
| WO (1) | WO2005115606A1 (ja) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101657408B (zh) | 2007-04-03 | 2012-10-03 | Lg化学株式会社 | 使用固定床催化部分氧化反应器制备不饱和醛和/或不饱和脂肪酸的方法 |
| CN101260033B (zh) * | 2008-01-27 | 2010-09-22 | 中国石油集团工程设计有限责任公司东北分公司 | 丙烯两步加氧法制丙烯酸的新鲜空气温度控制系统 |
| CN102590357A (zh) * | 2012-01-09 | 2012-07-18 | 山东科技大学 | 基于PSoC3的煤岩声发射监测系统模拟信号源 |
| CN104437270B (zh) * | 2014-11-14 | 2017-06-09 | 中国石油集团东北炼化工程有限公司吉林设计院 | 丙烯酸反应系统 |
| CN111450778B (zh) * | 2019-01-22 | 2023-04-07 | 中国石化工程建设有限公司 | 一种用于制备聚α-烯烃的聚合反应系统和方法 |
| CN110274512B (zh) * | 2019-07-15 | 2024-05-03 | 北京凯瑞英科技有限公司 | 一种精确控制热反应温度的反应器系统和工艺 |
| WO2022195071A1 (en) * | 2021-03-19 | 2022-09-22 | Basf Se | Apparatus and method for hotspot detection in a tube bundle reactor |
| CN113934244B (zh) * | 2021-09-27 | 2022-07-22 | 浙江大华技术股份有限公司 | 温度控制系统和温度控制方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5421966A (en) * | 1977-07-20 | 1979-02-19 | Nippon Shokubai Kagaku Kogyo Co Ltd | Vapor-phase catalytic oxidizing method |
| JP2001280774A (ja) * | 2000-03-30 | 2001-10-10 | Toshiba Corp | 電気機器の冷却システム |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2098148A (en) * | 1937-02-26 | 1937-11-02 | Beck Koller & Company Inc | Vapor phase catalytic process and apparatus |
| US3482948A (en) * | 1967-06-14 | 1969-12-09 | Reichhold Chemicals Inc | Apparatus for exothermic catalytic reactions |
| JPH03181331A (ja) * | 1989-12-12 | 1991-08-07 | Mitsubishi Heavy Ind Ltd | 反応装置の反応温度制御方法 |
| JPH03181330A (ja) * | 1989-12-12 | 1991-08-07 | Mitsubishi Heavy Ind Ltd | 反応装置の反応温度制御方法 |
| GB0121375D0 (en) * | 2001-09-04 | 2001-10-24 | Ashe Morris Ltd | Temperature control systems |
| JP4024699B2 (ja) | 2002-03-11 | 2007-12-19 | 三菱化学株式会社 | 接触気相酸化方法 |
-
2004
- 2004-05-27 JP JP2004158036A patent/JP4742520B2/ja not_active Expired - Lifetime
- 2004-12-01 WO PCT/JP2004/018231 patent/WO2005115606A1/ja not_active Ceased
- 2004-12-01 US US11/597,822 patent/US7811524B2/en active Active
- 2004-12-01 CN CNB2004800006233A patent/CN100531888C/zh not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5421966A (en) * | 1977-07-20 | 1979-02-19 | Nippon Shokubai Kagaku Kogyo Co Ltd | Vapor-phase catalytic oxidizing method |
| JP2001280774A (ja) * | 2000-03-30 | 2001-10-10 | Toshiba Corp | 電気機器の冷却システム |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005334786A (ja) | 2005-12-08 |
| CN100531888C (zh) | 2009-08-26 |
| US7811524B2 (en) | 2010-10-12 |
| CN1697689A (zh) | 2005-11-16 |
| US20080025879A1 (en) | 2008-01-31 |
| JP4742520B2 (ja) | 2011-08-10 |
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