CN108273453B - Reaction heat taking method of hydroformylation synthesizer - Google Patents
Reaction heat taking method of hydroformylation synthesizer Download PDFInfo
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- CN108273453B CN108273453B CN201711213918.4A CN201711213918A CN108273453B CN 108273453 B CN108273453 B CN 108273453B CN 201711213918 A CN201711213918 A CN 201711213918A CN 108273453 B CN108273453 B CN 108273453B
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- 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
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C45/00—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds
- C07C45/49—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reaction with carbon monoxide
- C07C45/50—Preparation of compounds having >C = O groups bound only to carbon or hydrogen atoms; Preparation of chelates of such compounds by reaction with carbon monoxide by oxo-reactions
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- 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
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00076—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements inside the reactor
- B01J2219/00081—Tubes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention discloses a heat extraction method for a hydrogen low-pressure formylation synthesis reactor, and particularly relates to a safe, energy-saving and easily-adjusted external circulation heat extraction device, a heat extraction system and a heat extraction method. The system comprises a 1# and a 2# hydroformylation synthesis reactor, a 1# hydroformylation formation reaction cooler, a 1# hydroformylation reaction circulating pump, a desalination water tank, a desalted water circulating pump, a desalted water cooler and the like and a matched pipeline system. The reactor No. 1 in the method has large heat release, and adopts external circulating water to take heat, so that the cooling effect is good; the 2# reactor adopts an internal coil pipe for heat extraction, a stable closed type desalination water cooling system is established in the coil pipe, and the stability of the temperature of the reactor and the pressure of the reactor are realized without being influenced by factors such as cooling water, ambient temperature and the like; the independent cooling system does not damage an expensive catalyst system under the condition of leakage of equipment (a heat exchanger) and does not influence a process system; the temperature of a cooling medium is low, the cooling effect is good, the required external circulation flow is small, and the construction investment of an external circulation pump, an external circulation cooler and corresponding pipelines is less; the control effect is obvious, and the control is simple and stable.
Description
The technical field is as follows:
the invention belongs to a heat extraction method of a low-pressure hydroformylation synthesis reactor, and particularly relates to a safe, energy-saving and easily-adjusted external circulation heat extraction device, a heat extraction system and a heat extraction method.
Background art:
the hydroformylation reaction is a reaction process of simultaneously adding hydrogen atoms and formyl groups on double bonds of olefins to generate two isomeric aldehydes which have one more carbon atom than the original olefins under the action of catalysts of the olefins, carbon monoxide and hydrogen.
The hydroformylation reaction is strongly exothermic, the heat of reaction is approximately 125kJ/mol, and the removal of heat during the reaction is of critical importance. The hydroformylation synthesis process is carried out industrially in two continuous tank reactors made of stainless steel, the heat of reaction being removed in the following manner: the No. 1 reactor uses circulating water to obtain heat through an external circulating system; the coil pipe in the No. 2 reactor adopts the reaction liquid cooled by the No. 1 reactor to take heat; the material is cooled outside the reactor and then recycled to the coil of the formylation synthesis reactor.
In the hydroformylation synthesis reaction process, the most frequent parameter is regulated, namely the temperature of the two reactors, the stable reaction temperature is favorable for improving the product quality, the activity of the expensive catalyst can be protected, and the rhodium catalyst can be passivated and permanently inactivated at higher temperature. The above heat taking mode is not good in heat taking effect, a large amount of circulating water is consumed, the whole catalyst system can be damaged due to leakage of the heat exchanger, and the loss of the device is large.
The invention content is as follows:
to the problem that exists among the above-mentioned prior art, adopt the basis of getting the hot mode of 1# reactor cooling reaction liquid at the inside coil pipe of 2# formylation synthesis reactor, increase one set of independent confined desalination water cooling system, the inside coil pipe of 2# reactor of this system absorbs the reaction heat, get heat in utilizing closed desalination water cooling system, it is effectual to get the heat, the operation of being convenient for, can realize the nimble regulation of 2# reactor temperature, and then realize whole reaction system's stability and product quality's qualification and stability.
The technical scheme of the heat taking method of the hydroformylation synthesis reactor is as follows:
the method comprises the following steps that 1# hydroformylation synthesis reactor adopts external circulation circulating water to take heat, the external circulation of the reactor enters a heat exchanger cooled by circulating cooling water, one part of reactor liquid cooled by the cooling water and taken heat returns to the reactor, and the other part of reactor liquid enters a coil pipe of the 2# reactor, so that the cooled reaction liquid is prevented from being used in a switching manner when a closed desalted water cooling system breaks down;
the 2# hydroformylation synthesis reactor adopts an independent closed desalted water cooling system: desalted water heated by a coil pipe in the reactor enters a desalted water storage tank, a desalted water pump sends desalted water with higher temperature from the desalted water storage tank to a desalted water cooler, circulating water is used for cooling and heating hot desalted water, the cooled desalted water enters a coil pipe in the 2# reactor to absorb reaction heat generated by the 2# reactor, and the desalted water after heat absorption enters the desalted water storage tank to enter the next cycle.
The invention has the beneficial effects that:
1. the reactor No. 1 has large heat release, adopts external circulating water to take heat, and has good cooling effect.
2. The 2# reactor adopts an internal coil pipe for heat extraction, a stable closed type desalination water cooling system is established in the coil pipe, and the stability of the temperature of the reactor and the pressure of the reactor are realized without being influenced by factors such as cooling water, ambient temperature and the like; and the working pressure of the desalted water is low, about 0.5Mpa, and the power consumption is low.
3. The independent cooling system does not damage the catalyst system by desalinating water under the condition that equipment (heat exchanger) leaks, and the catalyst system adopts water as a solvent, so that the influence on a process system is avoided.
4. The temperature of the cooling medium is low, the cooling effect is good, the required external circulation flow is small, and the used external circulation pump, external circulation cooler and corresponding pipeline construction investment are less.
5. The control effect is obvious, and the control is simple and stable.
Drawings
FIG. 1 is a process flow diagram of a heat removal method for a hydroformylation synthesis reactor
Detailed description of the preferred embodiments
Olefin, carbon monoxide and hydrogen are used as raw materials, under the action of a water-soluble catalyst, under the pressure of 2.8-3.0MPa and the temperature of 80-110 ℃, the olefin, the carbon monoxide and the hydrogen react in two formylation synthesis reactors connected in series to generate mixed aldehyde, a large amount of heat is released in the reaction process, and the reaction heat is about 125 KJ/mol: the method comprises the following steps that a reaction solution of a 1# hydroformylation synthesis reactor enters a 1# reactor cooler through a circulating pump, the temperature is reduced to 60 ℃ from 110 ℃ through circulating water, one part of the reaction solution after cooling and heat removal through cooling water returns to the 1# hydroformylation synthesis reactor, and the other part of the reaction solution enters a coil pipe of a 2# hydroformylation synthesis reactor, and the heat generated by the 2# hydroformylation synthesis reactor is cooled and heated;
the method is characterized in that the heat released in the reaction process of the 2# hydroformylation synthesis reactor is about 20 percent of the whole reaction heat, and an independent closed desalination water cooling system is adopted for heat extraction, and the specific flow is as follows: the desalted water at about 80 ℃ heated by the coil pipes in the reactor enters a desalted water storage tank, a desalted water pump sends the desalted water with higher temperature from the desalted water storage tank to a desalted water cooler, circulating water is used for cooling the hot desalted water to obtain heat, the temperature is reduced to 50 ℃, the cooled desalted water enters the coil pipes in the 2# reactor to absorb reaction heat generated by the 2# reactor, and the desalted water after heat absorption enters the desalted water storage tank to enter the next cycle.
1. A heat extraction method for a hydroformylation synthesis reactor is characterized in that a 1# hydroformylation synthesis reactor adopts circulating water of an external cooler for heat extraction.
2. A heat extraction method for a hydroformylation synthesis reactor is characterized in that a 2# hydroformylation synthesis reactor utilizes an independent closed desalted water cooling system to extract heat.
3. A heat extraction method for a hydroformylation synthesis reactor is characterized in that a cooling reaction product of a 1# formylation synthesis reactor is divided into two paths: one part is returned to the 1# formylation synthesis reactor, and the other part is returned to the 2# formylation synthesis reactor coil.
4. A heat extraction method for a hydroformylation synthesis reactor is characterized in that an external independent closed desalted water cooling system is adopted, and 316L stainless steel is adopted, because the reaction solution has stronger corrosivity.
5. A heat taking method for a hydroformylation synthesis reactor comprises a 1# hydroformylation synthesis reactor, a 2# hydroformylation synthesis reactor, a 1# hydroformylation reaction cooler, a 1# hydroformylation reaction circulating pump, a desalination water tank, a desalination water circulating pump, a desalination water cooler and the like and a matched pipeline system.
Claims (1)
1. A heat extraction method for a low-pressure hydroformylation synthesis reactor comprises the following steps: olefin, carbon monoxide and hydrogen are used as raw materials, under the action of a water-soluble catalyst, under the pressure of 2.8-3.0MPa and the temperature of 80-110 ℃, the olefin, the carbon monoxide and the hydrogen react in two serially connected formylation synthesis reactors to generate mixed aldehyde, and a large amount of heat is released in the reaction process, wherein the reaction heat is about 125 KJ/mol; the method is characterized in that the heat released in the reaction process of the 2# hydroformylation synthesis reactor is about 20 percent of the whole reaction heat, and an independent closed desalination water cooling system is adopted for heat extraction, and the specific flow is as follows: the desalted water at about 80 ℃ heated by the coil pipes in the reactor enters a desalted water storage tank, a desalted water pump sends the desalted water with higher temperature from the desalted water storage tank to a desalted water cooler, circulating water is used for cooling the hot desalted water to obtain heat, the temperature is reduced to 50 ℃, the cooled desalted water enters the coil pipes in the 2# reactor to absorb reaction heat generated by the 2# reactor, and the desalted water after heat absorption enters the desalted water storage tank to enter the next cycle.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3868422A (en) * | 1971-12-23 | 1975-02-25 | Eastman Kodak Co | Multistage hydroformylation process |
| CN101337904B (en) * | 2008-08-15 | 2011-06-22 | 河南骏化发展股份有限公司 | Synthesis of DMF and device |
| CN101575272B (en) * | 2009-06-16 | 2012-10-10 | 南京荣欣化工有限公司 | Process for continuously producing corresponding aldehyde by alkene hydroformylation reaction |
| CN102826970B (en) * | 2011-06-17 | 2015-08-19 | 中国石油化工股份有限公司 | A kind of low-carbon alkene hydroformylation second-stage reaction process and device |
| KR101611113B1 (en) * | 2011-12-20 | 2016-04-08 | 다우 테크놀로지 인베스트먼츠 엘엘씨. | A hydroformylation process |
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