CN102730857B - Method and device for closed separation of washing wastewater of reaction product and surplus heat utilization in isobutene preparation by dehydrogenation of isobutane - Google Patents
Method and device for closed separation of washing wastewater of reaction product and surplus heat utilization in isobutene preparation by dehydrogenation of isobutane Download PDFInfo
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Abstract
The invention relates to methods and devices for closed separation of reaction product and washing wastewater and surplus heat utilization in isobutene preparation by dehydrogenation of isobutane and provides a method for closed separation of reaction product and washing wastewater and surplus heat utilization in isobutene preparation by dehydrogenation of isobutane. The method comprises the steps of: performing two-level micro cyclone purification on the washing wastewater of the reaction product in isobutene preparation by dehydrogenation of isobutene to remove catalyst granules in the washing wastewater so as to obtain washing water subjected to two-level micro cyclone purification; performing heat exchange on the washing water subjected to two-level micro cyclone purification, and preheating isobutane through the surplus heat of the washing water; and recycling the cooled washing water. The invention further provides a device for closed separation of reaction product and washing wastewater and surplus heat utilization in isobutene preparation by dehydrogenation of isobutene.
Description
Technical field
The invention belongs to petrochemical complex and field of Environment Protection, relate to the method for the sealing separation of a kind of preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water and UTILIZATION OF VESIDUAL HEAT IN, specifically, the present invention relates to preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water carry out micro-eddy flow purification, heat exchange is cooling, to realize the method for recycle and heat recovery of washing water.The invention still further relates to the device of the sealing separation of a kind of preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water and UTILIZATION OF VESIDUAL HEAT IN.
Background technology
In petroleum refining industry, in the liquefied petroleum gas (LPG) generating in petroleum catalytic cracking (FCC) process, be rich in Trimethylmethane.In traditional FCC technique, the massfraction of Trimethylmethane in catalytic cracking liquefied gas is 20% left and right.China's Trimethylmethane aboundresources, the output in annual catalytic cracking gasoline gas is just had an appointment 4,000,000 tons (2006 annual datas), is also extensively present in Sweet natural gas and other C 4 fractions.The Trimethylmethane overwhelming majority in domestic catalytic cracking gasoline gas is as civil LPG fuel, and the consumption of other purposes is less than 5% of total amount, and China is also in the primary stage to the use of Trimethylmethane.
Iso-butylene is one of current China scarce resource, is the important source material of producing the chemical such as polyisobutene (PIB), methyl tertiary butyl ether (MTBE), low-carbon alkene alkylation, mixing low-carbon alkene (petroleum naphtha), isoprene-isobutylene rubber and synthetic glass.Fine chemistry industry industrial development taking iso-butylene as resource is rapid, and demand growth is very fast, and producing isobutylene by catalytic dehydrogenation of isobutane becomes one of main method solving iso-butylene shortage.
In Trimethylmethane preparing isobutene process, under catalyst action, dehydrogenation of isobutane generates iso-butylene, has also generated the by product such as aldehyde, ketone simultaneously, except these impurity, obtains the thick product of iso-butylene by the water elution that boosts.Granules of catalyst is along with reaction gas enters washing tower, and then enters in washing water.These granules of catalyst are constantly accumulation in the process of reaction product washing cycling utilization of wastewater, makes system catalyst too high levels, increases product and purifies difficulty.Catalyzer is constantly accumulated and can be stopped up follow-up equipment simultaneously, when serious, must stop work and clean, and affects the continous-stable running of whole device.
From liquid, the adoptable equipment of separating catalyst has accurate filter, magnetic separator, ceramic membrane separation device, cyclone separator etc.Front four kind equipments all have employing in the time of solid-liquid separation process, use occasion difference, and effect also difference is very large.
Accurate filter mainly exists that cost is too high, maintenance cost is also relatively high, and it is excessive easily to stop up, stop up rear pressure drop, in the situation that low discharge, catalyst content are little, result of use is good, but in the situation that large flow, catalyst content are larger the bad problem of result of use.Equally, also there is above problem in ceramic membrane separation device, and ceramic membrane is the main mode that adopts cross flow filter in catalyst separating, so generally use in the smaller device for the treatment of capacity.Magnetic separator need be selected design according to the nature of catalyzer, passes through a high gradient magnetic separator containing the liquid of granules of catalyst, and catalyzer is subject to very strong magnetic field force effect, is captured and holds back, and realizes the separation of catalyzer.This technology application surface is narrow, and magnetic field need produce with electric field, and energy consumption is larger, effect bad under the large little content of flow.As can be seen here, to go out to meet the difficulty of liquid denitrating catalyst particle device production application request, that can long period stabilize the economy operation larger for Design and manufacture.
CN 101352621A discloses one and has utilized micro-cyclone separation process to separate MTO(methanol-to-olefins) method and apparatus of trickle catalyzer in quenched water, washing water, the trickle catalyzer of carrying secretly in MTO device quenched water, washing water is effectively separated, the clearance of the above particle of 3 μ m reaches more than 95%, and micro-cyclone separation process has obtained good embodiment in the superiority aspect fine solid particle separation.But along with system long-time running, catalyzer constantly weares and teares, granules of catalyst below 3 μ m is more and more, and method significantly reduces the separation efficiency of the granules of catalyst below 3 μ m described in this patent application, cause catalyzer equilibrium concentration in quenched water and washing water to increase, affect quenched water and washing water recycle.
In petroleum chemical industry, usually can outflow temperature be the spent hot water of 40-80 DEG C, general enterprises all takes directly to discharge or force the mode of cooling rear recycling.Directly discharge can produce thermal pollution to environment, forces cooling meeting to cause the waste of the energy.Trimethylmethane preparing isobutene reaction product washing wastewater temperature is generally 70-80 DEG C, and this part water need to recycle, but due to excess Temperature, after needs are cooling, could use.For this class low temperature exhaust heat (being less than the liquid of 100 DEG C), current domestic refinery does not well utilize mode yet.Therefore how to consider to utilize the waste heat of Trimethylmethane preparing isobutene reaction product washing waste water to have important practical significance to saving energy and reduce the cost.
In a word, due to the problem that prior art exists, therefore this area is in the urgent need to purification and residual-heat utilization method and the device of the low and effective preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water of cost of development.
Summary of the invention
The invention provides a kind of preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water sealing separation of novelty and the method and apparatus of UTILIZATION OF VESIDUAL HEAT IN, thereby solved problems of the prior art.
On the one hand, the invention provides the method for the sealing separation of a kind of preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water and UTILIZATION OF VESIDUAL HEAT IN, the method comprises:
Preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water is carried out to the micro-eddy flow of two-stage and purify, to remove the granules of catalyst of wherein carrying secretly, obtain the washing water to purifying through the micro-eddy flow of two-stage;
The washing water purifying through the micro-eddy flow of two-stage is carried out to heat exchange, utilize the waste heat of washing water to carry out preheating to Trimethylmethane; And
By cooling washing water recycle.
One preferred embodiment in, the content of the granules of catalyst of carrying secretly in described preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water is 200-800mg/L, granules of catalyst particle diameter is 0.1-20 μ m, granules of catalyst skeletal density is 1200-2000kg/m
3.
Another preferred embodiment in, the density 920-985kg/m of described preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water
3, viscosity is 0.50-0.85 centipoise.
Another preferred embodiment in, the temperature of described preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water is 70-80 DEG C, the temperature after heat exchange is to Trimethylmethane preheating is 30-40 DEG C.
Another preferred embodiment in, after the micro-eddy flow purifying treatment of one-level, in washing water, the content of granules of catalyst is not more than 150mg/L; After the micro-eddy flow purifying treatment of secondary, in washing water, the content of granules of catalyst is brought down below 30mg/L.
Another preferred embodiment in, the enrichment phase of the granules of catalyst removing flows back to receipts outward, the enrichment phase of described granules of catalyst accounts for the 1-10 volume % of reaction product washing wastewater flow.
On the other hand, the invention provides the device of the sealing separation of a kind of preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water and UTILIZATION OF VESIDUAL HEAT IN, this device comprises:
Be connected with preparing isobutene through dehydrogenation of iso-butane reactor, for reaction product is carried out to chilling so that the quencher that reaction product is separated with water with the air-flow that carries granules of catalyst;
Be connected with quencher, for the water scrubber that the reaction product after chilling separates is washed, in order to further to remove the granules of catalyst in reaction product;
Be connected with water scrubber, for washing waste water being carried out to the micro-cyclone purifier of one-level of the micro-cyclonic separation of one-level;
Be connected with the micro-cyclone purifier of one-level, for washing waste water being carried out to the micro-cyclone purifier of secondary of the micro-cyclonic separation of secondary;
Be connected with the micro-cyclone purifier of secondary, for the raw material interchanger that the washing water purifying through the micro-eddy flow of two-stage is carried out to heat exchange, in order to the waste heat of water wash water, Trimethylmethane carried out to preheating; And
Be connected with raw material interchanger, for the water circulating pump that cooling washing water is carried, to realize the recycle of washing water.
One preferred embodiment in, the clearance that the micro-cyclone purifier of described one-level is greater than the granules of catalyst of 5 μ m to particle diameter in reaction product washing waste water is not less than 95%, its import is 0.15-0.20MPa with the pressure drop that water exports; The clearance that the micro-cyclone purifier of described secondary is greater than the catalyzer of 3 μ m to particle diameter in reaction product washing waste water is not less than 90%, and the pressure drop of its import and water outlet is 0.15-0.20MPa.
Another preferred embodiment in, described micro-cyclone purifier is made up of many eddy flow core pipes, its mounting means is vertical or horizontal.
Another preferred embodiment in, described raw material interchanger adopts tube and shell heat exchanger, tube side fluid is Trimethylmethane, shell-side fluid is washing water, the heat interchanging area of interchanger according to washing water just, finishing temperature and treatment capacity design.
Brief description of the drawings
Fig. 1 is according to the preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water sealing separation of the application embodiment and the process flow sheet of UTILIZATION OF VESIDUAL HEAT IN.
Embodiment
The present inventor finds after having passed through extensive and deep research, adopt micro-cyclone separation process to carry out two-step purification to preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water, can greatly reduce the content of catalyzer in reaction product washing waste water, improve the recycle efficiency of washing water; Utilize raw material interchanger to carry out preheating to Trimethylmethane, the waste heat of recycle-water wash water to greatest extent, avoids forcing the cooling calorific loss causing simultaneously.Based on above-mentioned discovery, the present invention is accomplished.
Technical conceive of the present invention is as follows:
The reaction product washing waste water entrained catalyst particles producing through washing tower in preparing isobutene through dehydrogenation of iso-butane process, these granules of catalyst particle diameters little (under normal operating state, be 1-10 μ m), constantly accumulation in the process of washing waste water recycle, make system catalyst too high levels, increase product and purify difficulty.Catalyzer is constantly accumulated and can be stopped up follow-up equipment simultaneously, when serious, must stop work and clean, and affects the continous-stable running of whole device, is therefore necessary the catalyzer in reaction product washing waste water to separate.As previously mentioned, from liquid, the adoptable equipment of separating catalyst is a lot, but neither one single equipment can be suitable for the purification of preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water.
The product that preparing isobutene through dehydrogenation of iso-butane process generates is taking iso-butylene as main, also have other by products, reaction product is carried a small amount of catalyzer with the form of gas and is left reactor together with by product, after quencher is cooling, enter water scrubber, catalyzer enters in water, discharges from water scrubber bottom with water.For the extension fixture cycle of operation, improve the cyclic utilization rate of washing water, be necessary reaction product washing waste water to purify.
Trimethylmethane preparing isobutene reaction product washing wastewater temperature is generally 70-80 DEG C, in this part water cycle process, due to excess Temperature, after needs are cooling, could use.For this class low temperature exhaust heat (being less than the liquid of 100 DEG C), current domestic refinery does not well utilize mode yet.Therefore, how to consider to utilize the waste heat of Trimethylmethane preparing isobutene reaction product washing waste water to have important practical significance to saving energy and reduce the cost.
The present invention adopts micro-cyclone separation process to carry out two-step purification to preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water, greatly reduces the content of catalyzer in reaction product washing waste water, has improved the recycle efficiency of washing water; Utilize raw material interchanger to carry out preheating to Trimethylmethane simultaneously, reclaimed to greatest extent the waste heat of washing water, avoided forcing the cooling calorific loss causing.
In a first aspect of the present invention, the method for the sealing separation of a kind of preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water and UTILIZATION OF VESIDUAL HEAT IN is provided, the method comprises:
Preparing isobutene through dehydrogenation of iso-butane reaction product is with the air-flow that carries granules of catalyst after quencher, and reaction product is separated with water;
Product after quencher separates enters water scrubber and washes, further to remove the granules of catalyst in product;
Washing waste water, from discharge water scrubber bottom, is squeezed into the micro-cyclone purifier of one-level through washing water pump, and to remove a small amount of granules of catalyst of wherein carrying secretly, catalyzer enrichment is the outer receipts that flow back to mutually;
Go the micro-cyclone purifier of secondary further to process through the washing water purifying, to remove the trace catalyst particle of wherein carrying secretly;
Cooling to carrying out through the washing water of the micro-eddy flow purifying treatment of two-stage, to realize the recycle of washing water;
The washing water purifying through the micro-eddy flow of magnitude removes raw material interchanger, Trimethylmethane is carried out to preheating, effectively to utilize the waste heat of washing water;
Cooling washing water returns to water scrubber through water circulating pump, to realize the recycle of washing water.
In the present invention, the content of the granules of catalyst that described preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water is carried secretly is 200-800mg/L, and the particle diameter of granules of catalyst is 0.1-20 μ m, and the skeletal density of granules of catalyst is 1200-2000kg/m
3.
In the present invention, the density of described preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water is 920-985kg/m
3, viscosity is 0.50-0.85 centipoise.
In the present invention, after the micro-cyclone purifier of one-level is processed, during washing is useless, catalyst content is not more than 150mg/L.
In the present invention, after the micro-cyclone purifier of secondary is processed, in washing water, catalyst content is down to below 30mg/L.
In the present invention, the temperature of described preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water is 70-80 DEG C, and the temperature after raw material interchanger is to Trimethylmethane preheating is 30-40 DEG C.
In the present invention, catalyzer enrichment accounts for the 1-10 volume % of reaction product washing wastewater flow mutually.
In a second aspect of the present invention, the device of the sealing separation of a kind of preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water and UTILIZATION OF VESIDUAL HEAT IN is provided, this device comprises:
Be connected with preparing isobutene through dehydrogenation of iso-butane reactor, for reaction product is carried out to chilling so that the quencher that reaction product is separated with water with the air-flow that carries granules of catalyst;
Be connected with described quencher, for the water scrubber that the product after quencher separates is washed, in order to further to remove the granules of catalyst in product;
Be connected with described water scrubber, for washing waste water being carried out to the micro-cyclone purifier of one-level of micro-cyclonic separation;
Be connected with the micro-cyclone purifier of described one-level, for washing waste water being carried out again to the micro-cyclone purifier of secondary of micro-cyclonic separation;
Be connected with the micro-cyclone purifier of described secondary, for Trimethylmethane being carried out to the raw material interchanger of preheating, to realize the utilization of waste heat of washing water;
Be connected with described raw material interchanger, for the water circulating pump that washing water is carried.
In the present invention, the micro-cyclone purifier of described one-level is not less than 95% to the clearance of catalyzer more than 5 μ m in reaction product washing waste water, and its import and water exit pressure drop are about 0.15-0.20MPa.
In the present invention, the micro-cyclone purifier of described secondary is not less than 90% to the clearance of catalyzer more than 3 μ m in reaction product washing waste water, and import and water exit pressure drop are about 0.15-0.20MPa.
In the present invention, the micro-cyclone purifier of described one-level and the micro-cyclone purifier of secondary are made up of many eddy flow core pipes, can vertical or horizontal installation.
In the present invention, the micro-cyclone purifier of described secondary can replace with the solid-liquid separating equipment that other can reach identical index.
In the present invention, described raw material interchanger adopts tube and shell heat exchanger, and tube side fluid is Trimethylmethane, and shell-side fluid is washing water.
In the present invention, the heat interchanging area of described interchanger according to washing water just, the design such as finishing temperature and treatment capacity.
Preferably, method and apparatus of the present invention also can be for the separation of fine granules of catalyst in other chemical industry waste water.
Preferably, method and apparatus of the present invention also can be for the utilization of other chemical industry waste water low temperature exhaust heats.
Below referring to accompanying drawing.
Fig. 1 is according to the preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water sealing separation of the application embodiment and the process flow sheet of UTILIZATION OF VESIDUAL HEAT IN.As shown in Figure 1, Trimethylmethane is added in reactor 1 and reacted, produce taking iso-butylene as main product and other by products, reaction product is carried a small amount of catalyzer with the form of gas and is left reactor 1, enter in quencher 2 after quenching, reaction product is separated with water; Product after quencher 2 separates enters in water scrubber 3, and catalyzer enters in washing waste water, then discharges from water scrubber 3 bottoms; Water scrubber 3 top expellant gas go follow-up flow process; Washing waste water enters the micro-cyclone purifier 4-1 of one-level and processes, catalyst recovery, and washing water after treatment enters the micro-cyclone purifier 4-2 of secondary and further processes, catalyst recovery; Deliver to raw material interchanger 5 through the washing water of two-step purification, Trimethylmethane is carried out to preheating, cooling washing water returns to water scrubber 3 through water circulating pump 6 and recycles.
Major advantage of the present invention is:
The present invention adopts micro-cyclone separation process to carry out two-step purification to Trimethylmethane preparing isobutene reaction product washing waste water, greatly reduces the content of catalyzer in reaction product washing waste water, has improved the recycle efficiency of washing water; Utilize interchanger to carry out preheating to Trimethylmethane simultaneously, reclaimed to greatest extent the waste heat of washing water, avoided forcing the cooling calorific loss causing.
embodiment
Further set forth the present invention below in conjunction with specific embodiment.But, should be understood that these embodiment only do not form limitation of the scope of the invention for the present invention is described.The test method of unreceipted actual conditions in the following example, conventionally according to normal condition, or the condition of advising according to manufacturer.Except as otherwise noted, all per-cent and umber are by weight.
embodiment 1:
100,000 tons/year of preparing isobutene through dehydrogenation of iso-butane devices, according to method of the present invention, adopt the mode of the micro-eddy flow purification of two-stage, heat exchange that reaction product washing waste water is sealed and separated and UTILIZATION OF VESIDUAL HEAT IN.Its concrete operation and effect are described below:
1. reaction product washing wastewater property (as shown in the table):
Note: in upper table, catalyst particle size is live catalyst particle size data, and actual procedure is due to catalyst abrasion, and particle diameter is obviously less than normal.
2. technical process:
Concrete technical process as shown in Figure 1.
3. implementation process:
Concrete implementation process as shown in Figure 1.
4. interpretation of result:
Use after method of the present invention and device, the cyclic utilization rate of washing water is greater than 98%, and in washing waste water, the clearance of granules of catalyst is greater than 95%, and in recirculated water wash water, the mean value of catalyst content is 28mg/L, reach the requirement of system balancing concentration, met the continuous operation of device.
In addition, by increasing raw material interchanger, reclaim the part of waste heat of washing water, avoided forcing the cooling energy loss causing, reduced the running cost of system.
All documents of mentioning in the present invention are all quoted as a reference in this application, are just quoted separately as a reference as each section of document.In addition should be understood that those skilled in the art can make various changes or modifications the present invention after having read above-mentioned teachings of the present invention, these equivalent form of values fall within the application's appended claims limited range equally.
Claims (8)
1. a method for the sealing separation of preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water and UTILIZATION OF VESIDUAL HEAT IN, the method comprises:
Preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water is carried out to the micro-eddy flow of two-stage and purify, to remove the granules of catalyst of wherein carrying secretly, obtain the washing water to purifying through the micro-eddy flow of two-stage;
The washing water purifying through the micro-eddy flow of two-stage is carried out to heat exchange, utilize the waste heat of washing water to carry out preheating to Trimethylmethane; And
By cooling washing water recycle,
Wherein, after the micro-eddy flow purifying treatment of one-level, in washing water, the content of granules of catalyst is not more than 150mg/L; After the micro-eddy flow purifying treatment of secondary, in washing water, the content of granules of catalyst is brought down below 30mg/L.
2. the method for claim 1, it is characterized in that, the content of the granules of catalyst of carrying secretly in described preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water is 200-800mg/L, and granules of catalyst particle diameter is 0.1-20 μ m, and granules of catalyst skeletal density is 1200-2000kg/m
3.
3. the method for claim 1, is characterized in that, the density 920-985kg/m of described preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water
3, viscosity is 0.50-0.85 centipoise.
4. the method for claim 1, is characterized in that, the temperature of described preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water is 70-80 DEG C, and the temperature after heat exchange is to Trimethylmethane preheating is 30-40 DEG C.
5. the method for claim 1, is characterized in that, the enrichment phase of the granules of catalyst removing flows back to receipts outward, and the enrichment phase of described granules of catalyst accounts for the 1-10 volume % of reaction product washing wastewater flow.
6. a device for the sealing separation of preparing isobutene through dehydrogenation of iso-butane reaction product washing waste water and UTILIZATION OF VESIDUAL HEAT IN, this device comprises:
Be connected with preparing isobutene through dehydrogenation of iso-butane reactor (1), for reaction product is carried out to chilling with the air-flow that carries granules of catalyst so that the quencher (2) that reaction product is separated with water;
Be connected with quencher (2), for the water scrubber (3) that the reaction product after chilling separates is washed, in order to further to remove the granules of catalyst in reaction product;
Be connected with water scrubber (3), for washing waste water being carried out to the micro-cyclone purifier of one-level (4-1) of the micro-cyclonic separation of one-level;
Be connected with the micro-cyclone purifier of one-level (4-1), for washing waste water being carried out to the micro-cyclone purifier of secondary (4-2) of the micro-cyclonic separation of secondary;
Be connected with the micro-cyclone purifier of secondary (4-2), for the raw material interchanger (5) that the washing water purifying through the micro-eddy flow of two-stage is carried out to heat exchange, in order to the waste heat of water wash water, Trimethylmethane carried out to preheating; And
Be connected with raw material interchanger (5), for the water circulating pump (6) that cooling washing water is carried, to realize the recycle of washing water,
Wherein, the clearance that the micro-cyclone purifier of described one-level is greater than the granules of catalyst of 5 μ m to particle diameter in reaction product washing waste water is not less than 95%, and the pressure drop of its import and water outlet is 0.15-0.20MPa; The clearance that the micro-cyclone purifier of described secondary is greater than the catalyzer of 3 μ m to particle diameter in reaction product washing waste water is not less than 90%, and the pressure drop of its import and water outlet is 0.15-0.20MPa.
7. device as claimed in claim 6, is characterized in that, described micro-cyclone purifier is made up of many eddy flow core pipes, and its mounting means is vertical or horizontal.
8. device as claimed in claim 6, is characterized in that, described raw material interchanger adopts tube and shell heat exchanger, and tube side fluid is Trimethylmethane, and shell-side fluid is washing water, the heat interchanging area of interchanger according to washing water just, finishing temperature and treatment capacity design.
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| CN201210241457.2A CN102730857B (en) | 2012-07-12 | 2012-07-12 | Method and device for closed separation of washing wastewater of reaction product and surplus heat utilization in isobutene preparation by dehydrogenation of isobutane |
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| CN201210241457.2A CN102730857B (en) | 2012-07-12 | 2012-07-12 | Method and device for closed separation of washing wastewater of reaction product and surplus heat utilization in isobutene preparation by dehydrogenation of isobutane |
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| CN104557406A (en) * | 2014-12-18 | 2015-04-29 | 安徽泰合森能源科技有限责任公司 | Isobutane dehydrogenation device |
| US9896395B2 (en) | 2015-11-04 | 2018-02-20 | Exxonmobil Chemical Patents Inc. | Process and system for making cyclopentadiene and/or dicyclopentadiene |
| RU2655924C1 (en) * | 2018-02-27 | 2018-05-30 | Акционерное общество "Специальное конструкторско-технологическое бюро "Катализатор" | Method for obtaining olefin hydrocarbons |
| CN109701454B (en) * | 2019-01-28 | 2024-02-13 | 安庆市泰发能源科技有限公司 | Butane dehydrogenation start-up circulation heating device |
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