CN1030908A - With deposed polystyrene, styrene tar preparation of styrene - Google Patents
With deposed polystyrene, styrene tar preparation of styrene Download PDFInfo
- Publication number
- CN1030908A CN1030908A CN88103864A CN88103864A CN1030908A CN 1030908 A CN1030908 A CN 1030908A CN 88103864 A CN88103864 A CN 88103864A CN 88103864 A CN88103864 A CN 88103864A CN 1030908 A CN1030908 A CN 1030908A
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- CN
- China
- Prior art keywords
- styrene
- styrene monomer
- rectifying
- tar
- polystyrene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C4/00—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms
- C07C4/22—Preparation of hydrocarbons from hydrocarbons containing a larger number of carbon atoms by depolymerisation to the original monomer, e.g. dicyclopentadiene to cyclopentadiene
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The present invention is to provide a kind of technology that adopts the cracked method to produce styrene monomer.Its main process is for redistillation rectifying after cracking makes the industrial goods styrene monomer with benzene feedstock ethylene bottom oil or waste polystyrene plastics.It not only has to turn waste into wealth and is beneficial to environment protection, and simple for process, and equipment requirements is not high, less investment, and reaction conditions is gentle.Opened up a new road in particular for recycling of polystyrene type plastics.
Description
The present invention is to provide a kind of technology that adopts the cracked method to produce styrene monomer.
Vinylbenzene is as basic Organic Chemicals, and at present, what its mode of producing adopted basically is, makes ethylbenzene behind the benzene-alkylation, makes vinylbenzene by ethylbenzene dehydrogenation again.This production method, its complex process, the equipment requirements height is invested greatlyyer, and it is also big to consume energy, and particularly will consume a large amount of Elementary Chemical Industry raw material-benzene.
At present, the various polystyrene plastic of styrene tar and depleted are useless gurry basically, and wherein styrene tar also only is to do water-proof material in order to replace cheap pitch.Like this, be not only the big waste of a kind of tool, environment has also been produced pollution.
The objective of the invention is, provide styrene tar or waste polystyrene are carried out cracking, and produce the method for industrial chemicals styrene monomer.
The objective of the invention is to obtain styrene monomer and realize by with redistillation after the cracking of raw material (styrene tar or waste polystyrene plastics) process, rectifying.Below its technological process is described:
1, cracking: waste polyethylene plastics or styrene tar are dropped into cracking still, and firing up is controlled between 320～400 ℃ temperature in the kettle, can produce the crude styrene monomer;
2, distillation: the above-mentioned crude styrene monomer that obtains is dropped in the still kettle, temperature is controlled in 80～110 ℃ of scopes, vacuum degree control is in 550～650mmHg scope, and the promptly retortable content that obtains is at the styrene monomer more than 70%.This styrene monomer can be directly with in the industry such as the phenylethene modified resin of production.
3, rectifying: the distillation after product, through rectifying tower rectifying, intercept 145～147 ℃ of cuts, get final product the product of content more than 99%.
If what above-mentioned raw materials adopted is styrene tar, then the residuum after the distillation can be paid the product stopper through being cooled to produce below 0 ℃.
If what above-mentioned raw materials adopted is polystyrene plastic, then after cracking, presses 2% of crude styrene amount before the distillation and add stopper.Its stopper can adopt polyatomic phenol, as adopting Resorcinol.
Control condition among the present invention can be controlled at further: cracking temperature at 360～380 ℃, distillation temperature at 90～95 ℃, distillation vacuum tightness at 600mmHg for best.
The present invention not only makes it waste turns waste into wealth, and has avoided the environmental pollution that brings thus, and simple for process, and equipment requirements is not high, invests lessly, and the reaction conditions gentleness has been opened up a new road in particular for recycling of polystyrene type plastics.
Claims (3)
1, a kind of technology that adopts waste polystyrene or styrene tar to produce styrene monomer is characterized in that,
A, cracking: waste polystyrene or styrene tar are dropped into cracking still, and firing up is controlled between 320～400 ℃ temperature in the kettle, produces the crude styrene monomer,
B, distillation: the crude styrene monomer is dropped in the still kettle as adopts waste polystyrene is raw material, 2% the stopper of then using simultaneously by the crude styrene amount together drops in the still kettle), its still temperature control is at 80～110 ℃, and vacuum degree control is within 550～650mmHg scope.
C, rectifying: the product after the distillation, feed rectifying tower rectifying, intercept 145～147 ℃ of fractions.
2, by the described a kind of technology that adopts waste polystyrene or styrene tar to produce styrene monomer of claim 1, it is characterized in that cracking temperature is controlled in 360～380 ℃ of scopes.
3, by the described a kind of technology that adopts waste polystyrene or styrene tar to produce styrene monomer of claim 1, it is characterized in that temperature is controlled at 90～95 ℃ in the rectifying, vacuum degree control is at 600mmHg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88103864A CN1030908A (en) | 1988-06-23 | 1988-06-23 | With deposed polystyrene, styrene tar preparation of styrene |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN88103864A CN1030908A (en) | 1988-06-23 | 1988-06-23 | With deposed polystyrene, styrene tar preparation of styrene |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1030908A true CN1030908A (en) | 1989-02-08 |
Family
ID=4832797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88103864A Pending CN1030908A (en) | 1988-06-23 | 1988-06-23 | With deposed polystyrene, styrene tar preparation of styrene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1030908A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106905195A (en) * | 2017-03-10 | 2017-06-30 | 合肥工业大学 | A kind of method that styrene tar recycling prepares sulfonate |
-
1988
- 1988-06-23 CN CN88103864A patent/CN1030908A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106905195A (en) * | 2017-03-10 | 2017-06-30 | 合肥工业大学 | A kind of method that styrene tar recycling prepares sulfonate |
| CN106905195B (en) * | 2017-03-10 | 2019-04-05 | 合肥工业大学 | A kind of method that styrene tar recycling and reusing prepares sulfonate |
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Legal Events
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |