CN115073254A - Production method and production equipment of isobutene - Google Patents
Production method and production equipment of isobutene Download PDFInfo
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- CN115073254A CN115073254A CN202210673767.5A CN202210673767A CN115073254A CN 115073254 A CN115073254 A CN 115073254A CN 202210673767 A CN202210673767 A CN 202210673767A CN 115073254 A CN115073254 A CN 115073254A
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- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 title claims abstract description 116
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 47
- 239000003054 catalyst Substances 0.000 claims abstract description 39
- 238000006317 isomerization reaction Methods 0.000 claims abstract description 36
- 238000005336 cracking Methods 0.000 claims abstract description 27
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 claims abstract description 25
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 23
- 238000006266 etherification reaction Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000000926 separation method Methods 0.000 claims abstract description 15
- 239000001273 butane Substances 0.000 claims abstract description 10
- IJDNQMDRQITEOD-UHFFFAOYSA-N n-butane Chemical compound CCCC IJDNQMDRQITEOD-UHFFFAOYSA-N 0.000 claims abstract description 10
- OFBQJSOFQDEBGM-UHFFFAOYSA-N n-pentane Natural products CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 claims abstract description 10
- 230000007246 mechanism Effects 0.000 claims description 60
- 238000003756 stirring Methods 0.000 claims description 48
- 238000003860 storage Methods 0.000 claims description 26
- 238000007599 discharging Methods 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 14
- 244000309464 bull Species 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 21
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 12
- 239000000376 reactant Substances 0.000 description 7
- 238000006555 catalytic reaction Methods 0.000 description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 4
- IAQRGUVFOMOMEM-UHFFFAOYSA-N but-2-ene Chemical compound CC=CC IAQRGUVFOMOMEM-UHFFFAOYSA-N 0.000 description 4
- 229920005549 butyl rubber Polymers 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- VXNZUUAINFGPBY-UHFFFAOYSA-N 1-Butene Chemical compound CCC=C VXNZUUAINFGPBY-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- SZNYYWIUQFZLLT-UHFFFAOYSA-N 2-methyl-1-(2-methylpropoxy)propane Chemical compound CC(C)COCC(C)C SZNYYWIUQFZLLT-UHFFFAOYSA-N 0.000 description 2
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 238000005034 decoration Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 238000007086 side reaction Methods 0.000 description 2
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 229920002367 Polyisobutene Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003377 acid catalyst Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001768 cations Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000007334 copolymerization reaction Methods 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000006356 dehydrogenation reaction Methods 0.000 description 1
- XNMQEEKYCVKGBD-UHFFFAOYSA-N dimethylacetylene Natural products CC#CC XNMQEEKYCVKGBD-UHFFFAOYSA-N 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 125000001033 ether group Chemical group 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C1/00—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon
- C07C1/20—Preparation of hydrocarbons from one or more compounds, none of them being a hydrocarbon starting from organic compounds containing only oxygen atoms as heteroatoms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/85—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with two or more stirrers on separate shafts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/30—Driving arrangements; Transmissions; Couplings; Brakes
- B01F35/32—Driving arrangements
- B01F35/32005—Type of drive
- B01F35/3204—Motor driven, i.e. by means of an electric or IC motor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/45—Closures or doors specially adapted for mixing receptacles; Operating mechanisms therefor
-
- 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
- B01J19/0053—Details of the reactor
-
- 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
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
-
- 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
- B01J19/18—Stationary reactors having moving elements inside
-
- 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
- B01J8/0015—Feeding of the particles in the reactor; Evacuation of the particles out of the reactor
-
- 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
- B01J8/08—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles
- B01J8/10—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with moving particles moved by stirrers or by rotary drums or rotary receptacles or endless belts
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C41/00—Preparation of ethers; Preparation of compounds having groups, groups or groups
- C07C41/01—Preparation of ethers
- C07C41/05—Preparation of ethers by addition of compounds to unsaturated compounds
- C07C41/06—Preparation of ethers by addition of compounds to unsaturated compounds by addition of organic compounds only
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/22—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by isomerisation
- C07C5/23—Rearrangement of carbon-to-carbon unsaturated bonds
- C07C5/25—Migration of carbon-to-carbon double bonds
- C07C5/2506—Catalytic processes
- C07C5/2562—Catalytic processes with hydrides or organic compounds
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- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention relates to the technical field of isobutene production, and discloses a production method and production equipment of isobutene, wherein the production method of the isobutene comprises the following steps: s1, separation: separating carbon four fraction with etherified carbon four as main material; s2, isomerism: isomerizing the separated four-carbon fraction to obtain butane and crude isobutene; s3, etherification: etherifying the crude isobutene to obtain methyl tert-butyl ether; s4, cracking: cracking methyl tert-butyl ether to obtain high-purity isobutene; according to the production method and production equipment of isobutene, isomerization reaction is carried out on the four-carbon fraction, then components such as butane and isobutene are fractionated by adopting a common rectification method, and finally high-purity isobutene is obtained through cracking, so that the conditions such as reaction temperature are reduced, the conversion efficiency of the four-carbon fraction is improved, the utilization rate of a catalyst is improved in the reaction process, a higher energy efficiency ratio is obtained, and the production efficiency is improved.
Description
Technical Field
The invention relates to the technical field of isobutene production, in particular to a production method and production equipment of isobutene.
Background
Isobutene is an organic substance, has a molecular formula of C4H8, is colorless gas, and has the properties of being insoluble in water and easily soluble in alcohol, ether and sulfuric acid. The butyl rubber is mainly used for producing polyisobutylene and producing butyl rubber by copolymerization with isoprene, and the butyl rubber has good air tightness, more importantly, the surface of the butyl rubber is worn uniformly and can bear the high temperature of 200 ℃, so that the service life is prolonged.
The existing processes for producing isobutene mainly comprise a sulfuric acid extraction method, a methanol-etherification cracking method, a hydration-dehydration method, a butane dehydrogenation method, a molecular screening method and the like. The methanol-etherification cracking method is the mainstream production method for producing high-purity isobutene at present, and the flow comprises the following steps: 1. fully mixing the raffinate carbon four fraction with methanol, inputting the mixture into a reactor, and reacting the mixture with strong-acid cation resin in the reactor; 2. isobutene in the raffinate C4 reacts with methanol to generate methyl tertiary ether (MTBE) and is finally separated from reactants; 3. injecting the purified MTBE into a cracking reactor; 4. the products such as the isoolefine, the methanol and the like generated after cracking pass through a series of rectifying towers and water washing towers to remove residual methanol, MTBE which does not participate in the reaction and side reaction products, and obtain the final product isobutene.
However, the method has the disadvantages of more side reactions, so that a large amount of separation equipment is needed in the production process, the conditions such as temperature required by the reaction are high, the production flow is complex, the production efficiency and the energy consumption are high, and the energy efficiency ratio is poor. When the catalyst is used in various catalytic reactions in the production process, the catalyst is stacked and used, the contact area with reactants is small, the mixing uniformity is poor, the catalytic efficiency is poor, and the overall production efficiency is influenced.
In view of the above, the present invention provides a method for producing isobutylene and a production apparatus thereof, so as to solve several technical problems in the prior art.
Disclosure of Invention
The invention provides an isobutene production method and isobutene production equipment, which have the advantages of reducing reaction conditions through isomerization reaction, improving isobutene conversion rate and improving catalytic efficiency by adopting a mode of combining uniform-speed material discharge and uniform stirring.
The invention provides the following technical scheme: a method for producing isobutene comprises the following steps:
s1, separation: separating carbon four fraction with etherified carbon four as main material;
s2, isomerism: isomerizing the separated four-carbon fraction to obtain butane and crude isobutene;
s3, etherification: etherifying the crude isobutene to obtain methyl tert-butyl ether;
s4, cracking: cracking methyl tert-butyl ether to obtain high-purity isobutyl ether.
The invention also provides the following technical scheme: production equipment of isobutene comprises an isomerization kettle, a separation kettle, an etherification kettle and a cracking kettle, wherein the separation kettle, the isomerization kettle, the etherification kettle and the cracking kettle are sequentially connected through three pipelines, and a discharging mechanism is arranged in the isomerization kettle and used for uniformly releasing a spherical catalyst into the isomerization kettle;
the feeding mechanism comprises a screw rod which is arranged on the heterogeneous kettle in a sliding mode, a feeding plate is arranged on the screw rod, a plurality of circular holes are formed in the feeding plate and used for containing spherical catalysts, and a storage tank is arranged in the heterogeneous kettle and used for storing the spherical catalysts;
still be provided with rabbling mechanism and actuating mechanism in the heterogeneous cauldron, the rabbling mechanism is used for stirring carbon four-cut and spherical catalyst, actuating mechanism is used for the drive the drop feed mechanism with the rabbling mechanism operation.
As an alternative to the apparatus for the production of isobutene according to the invention, wherein: the discharging mechanism further comprises a sealing cover arranged on the storage tank in a sliding mode, a communicating groove is formed in the storage tank, a plurality of contact blocks are arranged on the sealing cover, and the contact blocks correspond to a plurality of circular holes in the discharging plate one to one.
As an alternative to the apparatus for the production of isobutene according to the invention, wherein: the drop feed mechanism is characterized in that the drop feed mechanism further comprises a fixed sleeve arranged in the storage tank, a movable sleeve is arranged on the sealing cover and arranged on the fixed sleeve in a sliding mode, a first spring is arranged on the storage tank, and the first spring is connected with the movable sleeve.
As an alternative to the apparatus for the production of isobutene according to the invention, wherein: the stirring mechanism comprises a rotary table which is arranged in the heterogeneous kettle in a rotating mode, the rotary table is in threaded connection with the screw rod, two rotating rods are arranged on the rotary table in a rotating mode, and stirring rods are arranged on the rotating rods.
As an alternative to the apparatus for the production of isobutene according to the invention, wherein: the stirring mechanism further comprises a sliding rail arranged in the heterogeneous kettle, and the two stirring rods are arranged on the sliding rail in a sliding mode.
As an alternative to the apparatus for the production of isobutene according to the invention, wherein: the rabbling mechanism still including set up in stopper on the carousel, seted up the spacing groove in the heterogeneous cauldron, just the stopper rotate set up in the spacing inslot.
As an alternative to the apparatus for the production of isobutene according to the invention, wherein: the two rotating rods are provided with chutes, the two stirring rods are arranged in the two chutes in a sliding mode respectively, the two stirring rods are provided with second springs respectively, and the two second springs are connected with the inner walls of the two chutes respectively.
As an alternative to the apparatus for the production of isobutene according to the invention, wherein: the stirring mechanism further comprises a first rack arranged in the heterogeneous kettle, a first gear is arranged on each stirring rod, and the first gears are meshed with the first racks.
As an alternative to the apparatus for the production of isobutene according to the invention, wherein: the driving mechanism comprises a motor arranged on the heterogeneous kettle, a second gear is arranged on the motor, a second rack is arranged on the screw rod, and the second rack is meshed with the second gear.
The invention has the following beneficial effects:
1. the production method of isobutene and production equipment thereof are improved on the basis of the traditional methanol-etherification cracking method, and the isomerization reaction is firstly carried out on four-carbon fraction, 1-butene component in the four carbon is converted into 2-butene component with higher boiling point, then the ordinary distillation method is adopted to fractionate butane, isobutene and other components, the etherification reaction is carried out on the obtained crude isobutene with higher purity than the traditional method to obtain methyl tert-butyl ether, and finally cracking is carried out to obtain high-purity isobutene, so that the conditions such as reaction temperature are reduced, the conversion efficiency of the four-carbon fraction is improved, higher energy efficiency ratio is obtained, and the production efficiency is improved.
2. According to the production method and the production equipment of the isobutene, the utilization rate of the catalyst is improved by gradually and uniformly releasing the catalyst, the spherical catalyst is placed through the plurality of circular holes in the material placing plate, and the contact area between the catalyst and reactants is increased. After the catalyst is used for a period of time, the catalyst is supplemented, the screw rod is driven to move downwards through the driving mechanism, the existing catalyst on the material placing plate is pushed out through the plurality of contact blocks, the sealing cover is pushed downwards, the catalyst in the material storing tank is supplemented onto the material placing plate through the communicating groove, and the operation is repeated, so that the utilization rate of the catalyst can be maximized, and the efficiency of catalytic reaction is improved.
3. According to the production method and production equipment of the isobutene, the driving mechanism drives the screw rod to move up and down and simultaneously drives the rotary table to rotate in a reciprocating mode, the rotary table drives the two stirring rods to rotate around the heterogeneous kettle, the two stirring rods rotate around the heterogeneous kettle, stirring is carried out on the catalyst and the reactant fully and comprehensively along with rotation and up-and-down fluctuation stirring, and the catalysis efficiency is further improved.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a first internal structural diagram of the present invention.
Fig. 3 is a second internal structural diagram of the present invention.
Fig. 4 is a partially enlarged view of a portion a in fig. 3.
Fig. 5 is a third internal structural diagram of the present invention.
Fig. 6 is a partial structural schematic diagram of the present invention.
Fig. 7 is a schematic view of a partial explosion structure of the present invention.
In the figure: 1. an isomerization kettle; 101. a separation kettle; 102. an etherification kettle; 103. a cracking kettle; 104. a pipeline; 2. a discharging mechanism; 201. a screw; 202. a material placing plate; 203. a material storage tank; 204. a sealing cover; 205. a communicating groove; 206. a contact block; 207. fixing the sleeve; 208. an active cannula; 209. a first spring; 3. a stirring mechanism; 301. a turntable; 302. a rotating rod; 303. a stirring rod; 304. a slide rail; 305. a limiting block; 306. a limiting groove; 307. a chute; 308. a second spring; 309. a first gear; 310. a first rack; 4. a drive mechanism; 401. a motor; 402. a second gear; 403. a second rack.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
In order to improve the prior methanol-etherification cracking method, reduce the reaction conditions and the reaction cost, the production method of the isobutene is provided;
the method comprises the following steps:
s1, separation: separating carbon four fraction with etherified carbon four as main material;
s2, isomerism: isomerizing the separated four-carbon fraction to obtain butane and crude isobutene;
s3, etherification: etherifying the crude isobutene to obtain methyl tert-butyl ether;
s4, cracking: cracking methyl tert-butyl ether to obtain high-purity isobutene.
Wherein, 1-butylene component in C4 is converted into 2-butylene component with higher boiling point by adopting an isomerization method, and then components such as butane, isobutene and the like are fractionated by adopting a common rectification method, thereby finally achieving the purpose of purifying isobutene. The butene isomerization reaction can reach higher conversion rate and more optimal selectivity under the condition of lower temperature, so the method has simple and easy flow, does not contain chemical reaction, and the obtained product has high quality and low price.
Example 2
The embodiment discloses production equipment of isobutene; specifically, referring to fig. 1 to 7, the device comprises an isomerization kettle 1, a separation kettle 101, an etherification kettle 102 and a cracking kettle 103, wherein the separation kettle 101, the isomerization kettle 1, the etherification kettle 102 and the cracking kettle 103 are sequentially connected through three pipelines 104, and a material discharging mechanism 2 is arranged in the isomerization kettle 1 and used for uniformly releasing a spherical catalyst into the isomerization kettle 1;
the discharging mechanism 2 comprises a screw 201 which is slidably arranged on the isomerization kettle 1, a discharging plate 202 is arranged on the screw 201, a plurality of circular holes are formed in the discharging plate 202 and used for containing spherical catalysts, and a storage tank 203 is arranged in the isomerization kettle 1 and used for storing the spherical catalysts;
still be provided with rabbling mechanism 3 and actuating mechanism 4 in the isomerization cauldron 1, rabbling mechanism 3 is used for stirring carbon four-cut and spherical catalyst, and actuating mechanism 4 is used for driving drop feed mechanism 2 and the operation of rabbling mechanism 3.
The separation kettle 101 is used for separating production raw materials to obtain a carbon four fraction, the carbon four fraction is input into the isomerization kettle 1 through a pipeline 104 to perform isomerization to obtain butane and crude isobutene, the butane and the crude isobutene are input into the etherification kettle 102 to perform fractionation to extract the crude isobutene to perform etherification reaction to obtain methyl tert-butyl ether, and finally the methyl tert-butyl ether is input into the cracking kettle 103 to perform cracking to obtain high-purity isobutene.
The isomerization kettle 1 is internally provided with a discharging mechanism 2 for uniformly releasing the catalyst into the isomerization kettle 1, and the catalyst is selected to be a spherical strong organic acid catalyst, so that the best isomerization reaction catalytic effect can be achieved.
Screw 201 slides from top to bottom along heterogeneous cauldron 1's upper end opening, the sliding part of screw 201 sets up to the rectangle, heterogeneous cauldron 1's upper end opening also plays limiting displacement for the rectangle, lower extreme at screw 201 is fixed with blowing board 202, a plurality of circular ports of seting up on blowing board 202 are used for holding spherical catalyst, can increase the area of contact of catalyst and reactant, storage tank 203 detachably installs on heterogeneous cauldron 1, the storage tank 203 has a large amount of catalysts in storage, the catalyst that holds on the blowing board 202 can be followed and is supplemented in the storage tank 203.
And then the driving mechanism 4 is arranged to drive the stirring mechanism 3 to stir the catalyst and the reactant in the isomerization kettle 1, so that the catalytic reaction efficiency can be further improved.
It should be added that the separation kettle 101, the etherification kettle 102 and the cracking kettle 103 may also be provided with a structure for enhancing the catalytic reaction efficiency, which is composed of the discharging mechanism 2, the stirring mechanism 3 and the driving mechanism 4, and the catalyst may be replaced accordingly. Isomerization vessel 1, separation vessel 101, etherification vessel 102, and cracking vessel 103 are all prior art and the remaining reaction conditions and associated process equipment achieved are not shown in the figure.
Example 3
In order to seal the catalyst in the storage tank 203 and open the catalyst when the discharge plate 202 is replenished, embodiment 3 is proposed;
the embodiment is an improved description based on the embodiment 2, and specifically, referring to fig. 2 to fig. 7, the emptying mechanism 2 further includes a sealing cover 204 slidably disposed on the storage tank 203, a communicating groove 205 is formed in the storage tank 203, the sealing cover 204 is provided with a plurality of abutting blocks 206, and the plurality of abutting blocks 206 correspond to the plurality of circular holes on the emptying plate 202 one by one;
the discharging mechanism 2 further comprises a fixed sleeve 207 arranged in the storage tank 203, a movable sleeve 208 is arranged on the sealing cover 204, the movable sleeve 208 is arranged on the fixed sleeve 207 in a sliding manner, a first spring 209 is arranged on the storage tank 203, and the first spring 209 is connected with the movable sleeve 208.
Wherein, the communicating groove 205 has been seted up at the lateral wall of storage tank 203, slidable mounting has sealed lid 204 on storage tank 203 and is used for sealing up the catalyst in the storage tank 203, is fixed with fixed sleeve 207 at the lower inner wall of storage tank 203, slidable mounting has movable sleeve 208 on fixed sleeve 207, and first spring 209 is located fixed sleeve 207, and its both ends are fixed respectively at the diapire of storage tank 203 and the inner wall of movable sleeve 208, and sealed lid 204 is fixed in the upper end of movable sleeve 208.
When the driving mechanism 4 drives the material discharging plate 202 to move downwards, the material discharging plate 202 firstly abuts against the sealing cover 204, and at the moment, the catalyst on the material discharging plate 202 is pushed out of the material discharging plate 202 by the plurality of abutting blocks 206 and is diffused into the isomerization reactor 1. Then the material discharge plate 202 pushes the sealing cover 204 to move downwards until the connecting groove 205 is contacted, and the catalyst enters the material discharge plate 202 for replenishment. The drive mechanism 4 then moves the discharge plate 202 upwardly away and the seal cap 204 is reset by the action of the first spring 209.
Example 4
Example 4 is presented for stirring the reactants and catalyst in the isomerization reactor 1;
the embodiment is an improved description based on embodiment 2, and specifically, referring to fig. 2 to fig. 6, a stirring mechanism 3 includes a turntable 301 rotatably disposed in an isomerization kettle 1, the turntable 301 is connected to a screw 201 in a threaded manner, two rotating rods 302 are rotatably disposed on the turntable 301, and stirring rods 303 are disposed on both the two rotating rods 302;
Wherein, carousel 301 rotates and installs the inner wall at isomeric cauldron 1, and carousel 301 threaded connection is on the surface of screw 201, and two bull sticks 302 are installed in the rotation of symmetry on carousel 301, and the lower extreme of two bull sticks 302 all is connected with puddler 303. When the screw 201 is driven by the driving mechanism 4 to move up and down, the turntable 301 is driven to rotate, and then the two rotating rods 302 and the two stirring rods 303 are driven to rotate around in the heterogeneous kettle 1 for stirring.
The surface of the turntable 301 is further fixed with a limiting block 305, the inner wall of the heterogeneous kettle 1 is provided with a limiting groove 306, and the limiting block 305 rotates along the limiting groove 306 to limit the turntable 301, so that the turntable 301 can rotate more stably.
Example 5
To further improve the stirring effect, example 5 is proposed;
the embodiment is an improved description based on embodiment 4, and specifically, referring to fig. 2-tu6, the stirring mechanism 3 further includes a slide rail 304 disposed in the isomerization kettle 1, and both of the two stirring rods 303 are slidably disposed on the slide rail 304;
the two rotating rods 302 are all provided with sliding grooves 307, the two stirring rods 303 are respectively arranged in the two sliding grooves 307 in a sliding manner, the two stirring rods 303 are respectively provided with a second spring 308, and the two second springs 308 are respectively connected with the inner walls of the two sliding grooves 307.
Wherein, be fixed with slide rail 304 at isomeric cauldron 1's lower inner wall, slide rail 304 is wavy annular track, and two puddlers 303 still can fluctuate thereupon when circling around the rotation along slide rail 304 to improve the effect of stirring, make the mixing reaction more abundant.
The lower ends of the two rotating rods 302 are both provided with sliding grooves 307, the two stirring rods 303 respectively slide up and down along the two sliding grooves 307, and two ends of the two second springs 308 are respectively fixed at the upper ends of the two stirring rods 303 and the lower inner walls of the two sliding grooves 307. So that the two stirring rods 303 can move up and down along the track of the sliding rail 304.
Example 6
To further improve the stirring effect, example 6 is presented;
in this embodiment, an improvement is made on the basis of embodiment 4, specifically, referring to fig. 2 to fig. 6, the stirring mechanism 3 further includes a first rack 310 disposed in the isomerization kettle 1, the two stirring rods 303 are both provided with first gears 309, and both the two first gears 309 are engaged with the first rack 310.
Example 7
To drive the screw 201 to move up and down, embodiment 7 is proposed;
in this embodiment, an improvement is made on the basis of embodiment 2, and specifically, referring to fig. 2 to fig. 6, the driving mechanism 4 includes a motor 401 disposed on the isomerization kettle 1, the motor 401 is provided with a second gear 402, the screw 201 is provided with a second rack 403, and the second rack 403 is engaged with the second gear 402.
Wherein, motor 401 is fixed mounting on isomeric cauldron 1, is fixed with second gear 402 on motor 401's the output shaft, is fixed with second rack 403 at the upper end of screw 201, and second rack 403 is the ellipse, and the inner wall distributes and has sharp tooth about it. The motor 401 operates to drive the second gear 402 to rotate, so that the second gear 402 is intermittently and alternately engaged with the teeth on the left and right sides of the second rack 403, and the screw 201 can be driven to do reciprocating linear motion up and down.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The method for producing isobutene is characterized by comprising the following steps:
s1, separation: separating carbon four fraction with etherified carbon four as main material;
s2, isomerism: isomerizing the separated four-carbon fraction to obtain butane and crude isobutene;
s3, etherification: etherifying the crude isobutene to obtain methyl tert-butyl ether;
s4, cracking: cracking methyl tert-butyl ether to obtain high-purity isobutene.
2. An apparatus for producing isobutylene, which is applied to the production method according to claim 1, characterized in that: the production equipment comprises an isomerization kettle (1), a separation kettle (101), an etherification kettle (102) and a cracking kettle (103), wherein the separation kettle (101), the isomerization kettle (1), the etherification kettle (102) and the cracking kettle (103) are sequentially connected through three pipelines (104), and a material discharging mechanism (2) is arranged in the isomerization kettle (1) and used for uniformly releasing spherical catalysts into the isomerization kettle (1); the feeding mechanism (2) comprises a screw rod (201) which is arranged on the heterogeneous kettle (1) in a sliding mode, a feeding plate (202) is arranged on the screw rod (201), a plurality of round holes are formed in the feeding plate (202) and used for containing spherical catalysts, and a storage tank (203) is arranged in the heterogeneous kettle (1) and used for storing the spherical catalysts; the heterogeneous reactor is characterized in that a stirring mechanism (3) and a driving mechanism (4) are further arranged in the heterogeneous reactor (1), the stirring mechanism (3) is used for stirring carbon four-fraction and spherical catalyst, the driving mechanism (4) is used for driving the discharging mechanism (2) and the stirring mechanism (3) to operate, the discharging mechanism (2) further comprises a sealing cover (204) arranged on the storage tank (203) in a sliding mode, a communicating groove (205) is formed in the storage tank (203), a plurality of contact blocks (206) are arranged on the sealing cover (204), the contact blocks (206) correspond to a plurality of circular holes in the discharging plate (202) one by one, the discharging mechanism (2) further comprises a fixed sleeve (207) arranged in the storage tank (203), a movable sleeve (208) is arranged on the sealing cover (204), and the movable sleeve (208) is arranged on the fixed sleeve (207) in a sliding mode, the storage tank (203) is provided with a first spring (209), and the first spring (209) is connected with the movable sleeve (208).
3. The apparatus for producing isobutylene according to claim 2, characterized in that: rabbling mechanism (3) including rotate set up in carousel (301) in the heterogeneous cauldron (1), carousel (301) threaded connection in on screw rod (201), it is provided with two bull sticks (302), two to rotate on carousel (301) all be provided with puddler (303) on bull stick (302).
4. The apparatus for producing isobutylene according to claim 5, characterized in that: the stirring mechanism (3) further comprises a sliding rail (304) arranged in the heterogeneous kettle (1), and the two stirring rods (303) are arranged on the sliding rail (304) in a sliding manner.
5. The apparatus for producing isobutylene according to claim 5, characterized in that: rabbling mechanism (3) still including set up in stopper (305) on carousel (301), seted up spacing groove (306) in heterogeneous cauldron (1), just stopper (305) rotate set up in spacing groove (306).
6. The apparatus for producing isobutylene according to claim 5, characterized in that: the two rotating rods (302) are provided with sliding grooves (307), the two stirring rods (303) are arranged in the two sliding grooves (307) in a sliding mode respectively, the two stirring rods (303) are provided with second springs (308), and the two second springs (308) are connected with the inner walls of the two sliding grooves (307) respectively.
7. The apparatus for producing isobutylene according to claim 5, characterized in that: the stirring mechanism (3) further comprises a first rack (310) arranged in the heterogeneous kettle (1), two stirring rods (303) are provided with first gears (309), and the first gears (309) are meshed with the first rack (310).
8. The apparatus for producing isobutylene according to claim 2, characterized in that: the driving mechanism (4) comprises a motor (401) arranged on the heterogeneous kettle (1), a second gear (402) is arranged on the motor (401), a second rack (403) is arranged on the screw rod (201), and the second rack (403) is meshed with the second gear (402).
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| CN202210673767.5A CN115073254A (en) | 2022-06-15 | 2022-06-15 | Production method and production equipment of isobutene |
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| CN202210673767.5A CN115073254A (en) | 2022-06-15 | 2022-06-15 | Production method and production equipment of isobutene |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116173845A (en) * | 2023-04-25 | 2023-05-30 | 中浩建能源科技(山东)有限公司 | Stirring mixing device for methyl tertiary butyl ether production |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070391A (en) * | 2011-01-12 | 2011-05-25 | 王伟跃 | Method for preparing isobutylene by comprehensively using mixed C4 |
| CN104945228A (en) * | 2014-03-28 | 2015-09-30 | 中国石油化工股份有限公司 | Method for preparing MTBE or isobutylene by adopting mixed butane |
| CN106045810A (en) * | 2016-07-05 | 2016-10-26 | 中石化上海工程有限公司 | Isobutylene production method |
-
2022
- 2022-06-15 CN CN202210673767.5A patent/CN115073254A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102070391A (en) * | 2011-01-12 | 2011-05-25 | 王伟跃 | Method for preparing isobutylene by comprehensively using mixed C4 |
| CN104945228A (en) * | 2014-03-28 | 2015-09-30 | 中国石油化工股份有限公司 | Method for preparing MTBE or isobutylene by adopting mixed butane |
| CN106045810A (en) * | 2016-07-05 | 2016-10-26 | 中石化上海工程有限公司 | Isobutylene production method |
Non-Patent Citations (1)
| Title |
|---|
| 王建强等: "临氢异构技术在碳四利用中的应用进展", 《石油化工》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116173845A (en) * | 2023-04-25 | 2023-05-30 | 中浩建能源科技(山东)有限公司 | Stirring mixing device for methyl tertiary butyl ether production |
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Application publication date: 20220920 |