CN107118070A - A kind of new propylene refining method - Google Patents
A kind of new propylene refining method Download PDFInfo
- Publication number
- CN107118070A CN107118070A CN201710327989.0A CN201710327989A CN107118070A CN 107118070 A CN107118070 A CN 107118070A CN 201710327989 A CN201710327989 A CN 201710327989A CN 107118070 A CN107118070 A CN 107118070A
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- propylene
- tower
- fine
- propylene tower
- crude
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/005—Processes comprising at least two steps in series
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- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Water Supply & Treatment (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A kind of new propylene refining method, it is related to technical field of chemical, its processing system includes material storage tank, material storage tank is connected with crude propylene tower, crude propylene tower bottom of towe is connected by crude propylene tower water cooler with the first tank field, crude propylene column overhead is connected by pipeline with fine propylene tower, fine propylene tower bottom of towe is connected by pipeline with crude propylene column overhead, fine propylene tower is connected by fine propylene tower water cooler with fine propylene tower return tank, connected in fine propylene tower return tank by a pipeline with fine propylene tower return tank tank deck, connected in fine propylene tower return tank by another pipeline with the second tank field.This new propylene refining method is simple in construction, convenient to install, and production cost is low, intelligent environment protection, effectively removes the propane impurity being blended in material, the higher propylene product of purity has been obtained, so that the purity and quality of chemical products are improved, suitable for large-scale promotion.
Description
Technical field：
The present invention relates to technical field of chemical, and in particular to a kind of new propylene refining method.
Background technology：
Propylene is main from steam cracking and refinery catalytic cracking obtained, and propylene 70% or so comes from steam cracking in the world,
28% comes from refinery catalytic cracking (FCC) process, and the source of state's inner propene is almost steam cracking and FCC respectively accounts for one
Half, it also can obtain part third from Coal Chemical Industry Route methanol-to-olefins (MTO) or propylene processed (MTP) route in the last few years in addition
Alkene.Propylene is used for polypropylene (PP) as raw material, 70%, and other can also be used for acrylonitrile, expoxy propane and octyl alconyl etc..With
The development of catalyst structure, to the purity requirement more and more higher of propylene feedstocks.And crude propylene and Coal Chemical Industry Route are obtained
Propylene, often there is more and higher amount impurity than cracking propylene, thus its purification difficulty comes also above cracking
Propylene.
Propylene contains propane impurity, need to remove alkanes impurity, obtains the higher propylene of purity, then existing propylene essence
Method processed, can not all obtain the higher propylene of purity, and then influence product quality.
The content of the invention：
The invention aims to overcome the weak point that above-mentioned prior art is present, and provide a kind of new propylene refining side
Method, it is simple in construction, easy for installation, easy-maintaining, can obtain the higher propylene product of purity.
In order to solve the problems existing in background technology, the present invention is to adopt the following technical scheme that：Processing system includes thing
Expect storage tank, material storage tank bottom is connected by pipeline with crude propylene tower, and crude propylene tower bottom of towe passes through pipeline and crude propylene tower water cooling
Device charging aperture is connected, and crude propylene tower water cooler discharging opening is connected by pipeline with the first tank field, and crude propylene column overhead passes through pipeline
Connected with fine propylene tower, fine propylene tower bottom of towe is connected by pipeline with crude propylene column overhead, between fine propylene tower and crude propylene tower
Pipeline be provided with crude propylene tower reflux pump, fine propylene column overhead connected by pipeline with fine propylene tower water cooler charging aperture, smart
Propylene tower water cooler discharging opening is connected by pipeline with fine propylene tower return tank, passes through a pipeline and essence in fine propylene tower return tank
Propylene tower return tank tank deck is connected, and the pipeline between fine propylene tower return tank and fine propylene tower return tank tank deck is provided with fine propylene
Connected in tower reflux pump, fine propylene tower return tank by another pipeline with the second tank field.
Described crude propylene tower bottom is connected by pipeline with crude propylene tower reboiler.
Processing method is：
1）The material that material is stored in storage tank, storage tank is entered in crude propylene tower by pipeline carries out feed separation；
2）Crude propylene tower bottom of towe extraction product is the propane of purity 95.6%, and purity is cold through crude propylene water cooler for 95.6% propane
But to delivering to the first tank field after less than 40 DEG C；
3）Propylene fraction of the crude propylene column overhead extraction containing a small amount of propane, the propylene fraction containing a small amount of propane enters essence third
Propylene refining is carried out in alkene tower；
4）Fine propylene tower bottom of towe isolates remaining propane by crude propylene tower backflow pumped, and crude propylene tower tower is returned to after extraction
Top, remaining propane is cooled to after less than 40 DEG C by crude propylene water cooler delivers to the first tank field again；
5）The propylene of fine propylene column overhead extraction purity 99.7% is from fine propylene column overhead through fine propylene tower water cooler（8）After cooling
Into in fine propylene tower return tank；
6）Propylene in fine propylene tower return tank is by fine propylene tower reflux pump（The pump is provided with minimum reflux, and flow is by restriction orifice
Control）Extract out, extract rear portion out as backflow and send fine propylene column overhead back to, reflux ratio is 24, then another part extraction is delivered to
Second tank field.
Described step 1）Middle crude propylene tower bottom of towe thermal source is provided by crude propylene tower reboiler.
Convenient to install the beneficial effects of the invention are as follows simple in construction, production cost is low, intelligent environment protection, effectively removes mixing
Propane impurity in material, has obtained the higher propylene product of purity, so as to improve the purity and quality of chemical products, fits
In large-scale promotion.
Brief description of the drawings：
Fig. 1 is processing system structural representation of the present invention.
Embodiment：
Mode is implemented as follows in reference picture 1, specific use of the present invention：Processing system includes material storage tank 1, and the bottom of material storage tank 1 leads to
Piping is connected with crude propylene tower 2, and the bottom of towe of crude propylene tower 2 is connected by pipeline with the charging aperture of crude propylene tower water cooler 4, crude propylene
The discharging opening of tower water cooler 19 is connected by pipeline with the first tank field 5, and the tower top of crude propylene tower 2 is connected by pipeline with fine propylene tower 6,
The bottom of towe of fine propylene tower 6 is connected by pipeline with the tower top of crude propylene tower 2, and the pipeline between fine propylene tower 6 and crude propylene tower 2 is provided with
Crude propylene tower reflux pump 7, the tower top of fine propylene tower 6 is connected by pipeline with the charging aperture of fine propylene tower water cooler 8, fine propylene tower water cooling
The discharging opening of device 8 is connected by pipeline with fine propylene tower return tank 9, and a pipeline and fine propylene tower are passed through in fine propylene tower return tank 9
The tank deck of return tank 9 is connected, and the pipeline between fine propylene tower return tank 9 and the tank deck of fine propylene tower return tank 9 is provided with fine propylene tower
Connected in reflux pump 10, fine propylene tower return tank 9 by another pipeline with the second tank field 11.The described bottom of towe of crude propylene tower 2 is led to
Piping is connected with crude propylene tower reboiler 3.
Processing method is：
1）The material that material is stored in storage tank 1, storage tank 1 is entered by pipeline carries out feed separation in crude propylene tower 2；
2）The bottom of towe of crude propylene tower 2 extraction product is the propane of purity 95.6%, and the propane that purity is 95.6% is through crude propylene water cooler 4
It is cooled to after less than 40 DEG C and delivers to the first tank field 5；
3）The overhead extraction of crude propylene tower 2 contains the propylene fraction of a small amount of propane, and the propylene fraction containing a small amount of propane enters essence
Propylene refining is carried out in propylene tower 6；
4）The bottom of towe of fine propylene tower 6 is isolated remaining propane and extracted out by crude propylene tower reflux pump 7, and crude propylene tower is returned to after extraction
2 tower tops, remaining propane is cooled to after less than 40 DEG C by crude propylene water cooler 4 delivers to the first tank field 5 again；
5）The propylene of the overhead extraction purity 99.7% of fine propylene tower 6 is after the tower top of fine propylene tower 6 is cooled down through fine propylene tower water cooler 8
Into in fine propylene tower return tank 9；
6）Propylene in fine propylene tower return tank 9 is by fine propylene tower reflux pump 10（The pump is provided with minimum reflux, and flow is by metering hole
Plate is controlled）Extract out, extract rear portion out as backflow and send the tower top of fine propylene tower 9 back to, reflux ratio is 24, then another part extraction is sent
To the second tank field 11.
Described step 1）The middle bottom of towe thermal source of crude propylene tower 2 is provided by crude propylene tower reboiler 3.
Crude propylene tower 2 and the purpose of fine propylene tower 6 are to separate the propane in propylene.
In summary, this new propylene refining method is simple in construction, convenient to install, and production cost is low, intelligent environment protection, effectively
The propane impurity being blended in material is removed, the higher propylene product of purity has been obtained, so as to improve the purity of chemical products
And quality, suitable for large-scale promotion.
Claims (4)
1. a kind of new propylene refining method, it is characterised in that：Processing system includes material storage tank（1）, material storage tank（1）Bottom
Pass through pipeline and crude propylene tower（2）Connection, crude propylene tower（2）Bottom of towe passes through pipeline and crude propylene tower water cooler（4）Charging aperture connects
It is logical, crude propylene tower water cooler（19）Discharging opening passes through pipeline and the first tank field（5）Connection, crude propylene tower（2）Tower top passes through pipeline
With fine propylene tower（6）Connection, fine propylene tower（6）Bottom of towe passes through pipeline and crude propylene tower（2）Tower top is connected, fine propylene tower（6）With
Crude propylene tower（2）Between pipeline be provided with crude propylene tower reflux pump（7）, fine propylene tower（6）Tower top passes through pipeline and fine propylene
Tower water cooler（8）Charging aperture is connected, fine propylene tower water cooler（8）Discharging opening passes through pipeline and fine propylene tower return tank（9）Connection,
Fine propylene tower return tank（9）It is interior to pass through a pipeline and fine propylene tower return tank（9）Tank deck is connected, fine propylene tower return tank（9）With
Fine propylene tower return tank（9）Pipeline between tank deck is provided with fine propylene tower reflux pump（10）, fine propylene tower return tank（9）It is interior logical
Cross another pipeline and the second tank field（11）Connection.
2. a kind of new propylene refining method according to claim 1, it is characterised in that：Crude propylene tower（2）Bottom of towe passes through
Pipeline and crude propylene tower reboiler（3）Connection.
3. a kind of new propylene refining method according to claim 1, it is characterised in that：Processing method is：
1）Material is stored in storage tank（1）, storage tank（1）Interior material enters crude propylene tower by pipeline（2）Interior carry out thing
Material separation；
2）Crude propylene tower（2）Bottom of towe extraction product is the propane of purity 95.6%, and the propane that purity is 95.6% is through crude propylene water cooling
Device（4）It is cooled to after less than 40 DEG C and delivers to the first tank field（5）；
3）Crude propylene tower（2）Overhead extraction contains the propylene fraction of a small amount of propane, and the propylene fraction containing a small amount of propane is entered
Fine propylene tower（6）Interior carry out propylene refining；
4）Fine propylene tower（6）Bottom of towe isolates remaining propane by crude propylene tower reflux pump（7）Extract out, thick third is returned to after extraction
Alkene tower（2）Tower top, remaining propane passes through crude propylene water cooler again（4）It is cooled to after less than 40 DEG C and delivers to the first tank field（5）；
5）Fine propylene tower（6）The propylene of overhead extraction purity 99.7% is from fine propylene tower（6）Tower top is through fine propylene tower water cooler（8）
Enter fine propylene tower return tank after cooling（9）It is interior；
6）Fine propylene tower return tank（9）Interior propylene is by fine propylene tower reflux pump（10）（The pump is provided with minimum reflux, and flow is by limiting
Discharge orifice plate is controlled）Extract out, extract rear portion out as backflow and send fine propylene tower back to（9）Tower top, reflux ratio is 24, then another part
The second tank field is delivered in extraction（11）.
4. a kind of new propylene refining method according to claim 5, it is characterised in that：Step 1）Middle crude propylene tower（2）
Tower endogenous pyrogen is by crude propylene tower reboiler（3）There is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710327989.0A CN107118070A (en) | 2017-05-11 | 2017-05-11 | A kind of new propylene refining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710327989.0A CN107118070A (en) | 2017-05-11 | 2017-05-11 | A kind of new propylene refining method |
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| Publication Number | Publication Date |
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| CN107118070A true CN107118070A (en) | 2017-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710327989.0A Pending CN107118070A (en) | 2017-05-11 | 2017-05-11 | A kind of new propylene refining method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108586185A (en) * | 2018-06-25 | 2018-09-28 | 榆林学院 | A kind of differential pressure thermocouple propylene refining piece-rate system and separation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106008132A (en) * | 2016-05-20 | 2016-10-12 | 山东京博石油化工有限公司 | Gas separation process |
| CN106316761A (en) * | 2015-06-24 | 2017-01-11 | 中石化广州工程有限公司 | Method for separation of products of reaction for preparation of propylene from propane by dehydrogenation |
| CN106316760A (en) * | 2015-06-24 | 2017-01-11 | 中石化广州工程有限公司 | Separation method for reaction product of propane dehydrogenated propylene preparation |
-
2017
- 2017-05-11 CN CN201710327989.0A patent/CN107118070A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106316761A (en) * | 2015-06-24 | 2017-01-11 | 中石化广州工程有限公司 | Method for separation of products of reaction for preparation of propylene from propane by dehydrogenation |
| CN106316760A (en) * | 2015-06-24 | 2017-01-11 | 中石化广州工程有限公司 | Separation method for reaction product of propane dehydrogenated propylene preparation |
| CN106008132A (en) * | 2016-05-20 | 2016-10-12 | 山东京博石油化工有限公司 | Gas separation process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108586185A (en) * | 2018-06-25 | 2018-09-28 | 榆林学院 | A kind of differential pressure thermocouple propylene refining piece-rate system and separation method |
| CN108586185B (en) * | 2018-06-25 | 2023-11-17 | 榆林学院 | Differential pressure thermocouple propylene refining and separating system and separating method |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170901 |
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| RJ01 | Rejection of invention patent application after publication |