CN1200919C - Oxygen removing method of butadiene refining device - Google Patents
Oxygen removing method of butadiene refining device Download PDFInfo
- Publication number
- CN1200919C CN1200919C CN 02151534 CN02151534A CN1200919C CN 1200919 C CN1200919 C CN 1200919C CN 02151534 CN02151534 CN 02151534 CN 02151534 A CN02151534 A CN 02151534A CN 1200919 C CN1200919 C CN 1200919C
- Authority
- CN
- China
- Prior art keywords
- oxygen
- water washing
- washing tower
- butadiene
- raw materials
- 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.)
- Expired - Fee Related
Links
Images
Landscapes
- Removal Of Specific Substances (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
Abstract
The present invention relates to an oxygen removal method for devices for refining butadiene, which comprises the steps: an oxygen removal system is arranged before crude raw materials (namely butadiene) enter a water washing tower, NaNO2 aqueous solution with certain concentration is continuously pumped in the water washing tower by a measuring pump to ensure the certain concentration of the NaNO2 solution in the water washing tower, and free oxygen in the raw materials is removed through the sufficient contact of washing water in the water washing tower and materials. The concentration of the NaNO2 solution in the water washing tower is controlled to the degree that aqueous solution can effectively remove oxygen in the raw materials and can not pollute subsequent systems. The method of the present invention effectively removes oxygen carried with refining devices in crude raw materials (namely butadiene), the formation velocity of popcorn polymers in light fraction eliminating towers and heavy fraction eliminating towers can be greatly decelerated and even gradually eliminated possibly, and the operation period of the refining devices is greatly extended. The loss of butadiene caused by removing oxygen and emptying reflux tanks on the tops of original light fraction eliminating towers can be reduced.
Description
Technical field
The invention belongs to the method for divinyl refining plant raw material deoxygenation.
Background technology
The raw material crude butadiene enters water wash column and removes oxygenatedchemicalss such as acetonitrile, dipolymer and aldehyde ketone, removes carbon three alkynes and water through lightness-removing column again, separates heavy constituent through weight-removing column, obtains qualified polymerization-grade divinyl at last, as the cis-1,4-polybutadiene rubber raw materials for production.
The raw material of divinyl refining plant is that the acetonitrile extraction process produces divinyl, poly-unit reclaims divinyl, outsourcing divinyl compound, oxygen level is higher in the recovery divinyl, vapor detection oxygen level 3-7%, oxygen level is bigger to the autohemagglutination influence of divinyl in the raw material, along with the increase of oxygen level, the autohemagglutination speed of divinyl is obviously accelerated.Think and prove in many researchs that oxygen has played decisive action in the process that popcorn polymer forms, oxygen is to cause the poly-prerequisite of divinyl end.The existence of oxygen easily causes and aggravates the divinyl autohemagglutination in the raw material, has accelerated the speed that the equipment autohemagglutination stops up, and has shortened the device cycle of operation.Therefore, need take measures to remove oxygen in the raw material.
At present, free oxygen is mainly removed by the emptying of lightness-removing column return tank of top of the tower in the divinyl refining plant, and under the normal circumstances, this emptying amount is approximately 30Nm
3/ hr, and return tank gas phase oxygen level generally is no more than 1%, that is to say, what bleed off mainly is divinyl, and material does not have through deoxygenation in the lightness-removing column, advances the deoxygenation of weight-removing column material not to the utmost, cause popcorn polymer to form, equipment stops up, and need find a suitable deoxidation method to reduce the loss of divinyl in the emptying, thoroughly removes the oxygen in the raw material.
Summary of the invention
Technical problem to be solved by this invention provides a kind of deoxidation method of divinyl refining plant, can remove the free oxygen in the raw material effectively, reduces the divinyl autohemagglutination, the extension fixture cycle of operation.
The deoxidation method of divinyl refining plant of the present invention is characterized in that using NaNO
2The aqueous solution is squeezed into water wash column, utilizes the washing water in the water wash column to make the certain NaNO of maintenance in the water wash column
2Strength of solution is removed the free oxygen in the crude butadiene raw material.
NaNO
2Be a kind of oxygen scavenger commonly used, the present invention is used in these inorganic substance the free oxygen that can remove effectively in the device of organic products in the raw material.Before advancing water wash column, the crude butadiene raw material adds deaerating type of cycles, with certain density NaNO
2The aqueous solution is squeezed in the water wash column continuously with volume pump, guarantees certain NaNO in the water wash column
2Strength of solution utilizes the water wash column washed water with fully contacting of material free oxygen in the raw material to be removed.
According to micro-NaNO in the extraction of water wash column washing water
2Analytical data and system include the oxygen detection values, and the control recovered water does not influence environmental protection, adjust volume pump output NaNO
2Aqueous solution flow.Volume pump adopts electronic or manual mode is regulated flow, and the control concentration of aqueous solution is in 10～2000ppm scope, and preferred 20～300ppm makes the aqueous solution can effectively remove the oxygen in the raw material, can not cause the pollution of follow-up system again.The emission standard of general requirement water wash column washing water is NaNO
2Concentration is less than 10ppm.
Squeeze into the preceding NaNO of water wash column
2The compound concentration of the aqueous solution is preferably 10～40%, is convenient to process implementing.
Advantage of the present invention:
Effectively eliminate the oxygen of bringing refining plant in the crude butadiene raw material into, will slow down the formation speed of the popcorn polymer in lightness-removing column, the weight-removing column greatly, and might progressively disappear, prolong the cycle of operation of refining plant greatly.The divinyl loss that the top return tank emptying deoxygenation of former lightness-removing column causes will be reduced.Below be one group of data declaration:
Lightness-removing column emptying amount is by original 30Nm after adopting the present invention
3/ h is reduced to 3Nm
3/ h, annual divinyl discharging (30-3) * 3 (Kg/m that reduces of only this item
3) * 8000=648 ton is worth ten thousand yuan of 648 * 6200=401.76; System's oxygen level is reduced to less than 0.2% by original 0.5-1%, reduced the divinyl loss that the return tank emptying deoxygenation of lightness-removing column top causes, slowed down the formation speed of the polymkeric substance in lightness-removing column, the weight-removing column greatly, cycle of operation of divinyl refining plant is extended to more than 9 months by 6 months of past.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
The raw material crude butadiene enters water wash column and removes oxygenatedchemicalss such as acetonitrile, dipolymer and aldehyde ketone, removes carbon three alkynes and water through lightness-removing column again, separates heavy constituent through weight-removing column, obtains qualified polymerization-grade divinyl at last.According to micro-NaNO in the extraction of water wash column washing water
2Analytical data and system include the oxygen detection values, NaNO in the control recovered water
2Concentration is below the 10ppm, adjusts volume pump output NaNO
2Aqueous solution flow.Volume pump adopts electronic or manual mode is regulated flow, control NaNO
2Concentration of aqueous solution is at 10～2000ppm, preferred 20～300ppm.
As: regularly in storage tank, prepare 40% NaNO
2The aqueous solution, detecting oxygen level in the crude butadiene raw material is 3～7% (quality), NaNO in the washing water of water wash column extraction
2Concentration is 10ppm, the NaNO in the control water wash column
2Concentration is 20～300ppm.
Claims (4)
1, the deoxidation method of divinyl refining plant is characterized in that using NaNO
2The aqueous solution is squeezed into water wash column, utilizes the washing water in the water wash column to make NaNO in the water wash column
2Strength of solution is that 10～2000ppm is to remove the free oxygen in the crude butadiene raw material.
2, deoxidation method according to claim 1 is characterized in that NaNO in the water wash column
2Strength of solution is 20～300ppm.
3, deoxidation method according to claim 1 is characterized in that squeezing into the preceding NaNO of water wash column
2Concentration of aqueous solution is 10～40%.
4, deoxidation method according to claim 1 and 2 is characterized in that the NaNO in the washing water of water wash column discharging
2Concentration is less than 10ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02151534 CN1200919C (en) | 2002-12-31 | 2002-12-31 | Oxygen removing method of butadiene refining device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02151534 CN1200919C (en) | 2002-12-31 | 2002-12-31 | Oxygen removing method of butadiene refining device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1511811A CN1511811A (en) | 2004-07-14 |
| CN1200919C true CN1200919C (en) | 2005-05-11 |
Family
ID=34234415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02151534 Expired - Fee Related CN1200919C (en) | 2002-12-31 | 2002-12-31 | Oxygen removing method of butadiene refining device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1200919C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337858B (en) * | 2007-07-03 | 2011-09-07 | 中国石油化工股份有限公司 | Process and equipment for preparing 1,2-butadiene by continuous method |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2786979B1 (en) * | 2011-11-28 | 2016-02-03 | Asahi Kasei Chemicals Corporation | Method for purifying 1,3-butadiene |
| CN104974005A (en) * | 2014-04-03 | 2015-10-14 | 中国石化工程建设有限公司 | Method for washing crude butadiene |
| CN112521248A (en) * | 2020-12-09 | 2021-03-19 | 北方华锦化学工业股份有限公司 | Control device for filling polymerization inhibitor in butadiene washing tower |
| CN114133312B (en) * | 2021-11-05 | 2022-06-03 | 浙江传化合成材料有限公司 | Rectifying system and rectifying method for butadiene in butadiene rubber synthesis process |
-
2002
- 2002-12-31 CN CN 02151534 patent/CN1200919C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101337858B (en) * | 2007-07-03 | 2011-09-07 | 中国石油化工股份有限公司 | Process and equipment for preparing 1,2-butadiene by continuous method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1511811A (en) | 2004-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1200919C (en) | Oxygen removing method of butadiene refining device | |
| CN105174577A (en) | Coal chemical wastewater pretreatment process and device | |
| CN205347621U (en) | Move back tin waste liquor recovery tin and move back tin water recycle and regeneration system | |
| CN1803764A (en) | N, N-dimethylformamide regeneration method after C5 extraction desorption | |
| CN104292193A (en) | Method for grading biomass, preparing furfural and preparing levulinic acid through two steps | |
| CN106833719A (en) | A kind of method of extract and separate crude oil | |
| CN101445444A (en) | Method for recovering dilute acetic acid by extraction and azeotropic distillation | |
| CN204412022U (en) | A kind of rinsing type soda acid emission-control equipment | |
| CN1462729A (en) | Treatment process for two stage recycling alkali waste liquid drained off by process system of synthesizing octanol | |
| CN103483148A (en) | Dehydration recovery method of non-acid oxygen-containing organic substances in Fischer-Tropsch synthesis water | |
| CN102107924B (en) | Method for comprehensively recovering and treating furfural industrial wastewater | |
| CN204981457U (en) | Coal chemical wastewater preprocessing device | |
| CN207581743U (en) | A kind of diesel oxidation desulfurizing device | |
| CN110482764A (en) | The regenerative system of raffinate in hydrogen dioxide solution production by anthraquinone process technique | |
| CN114949905B (en) | Device and method for recycling methanol in methanol rectification non-condensable gas | |
| CN212395910U (en) | Low-temperature methanol washing rich liquid CO2 desorption device | |
| CN220047110U (en) | Ethyl propionate continuous dewatering device | |
| CN210302460U (en) | Petroleum resin flash evaporation system | |
| CN213865461U (en) | Reduce grey water ammonia content's black water processing system | |
| CN209602417U (en) | A kind of process equipment reducing thick DMMn water content | |
| CN205368196U (en) | Aftertreatment recovery unit of n butane oxidation method production cis -butenedioic anhydride | |
| CN209778699U (en) | Benzene hydrogenation technology extraction section refining plant | |
| CN218793954U (en) | Purifier of natural gas system acetylene | |
| CN205061986U (en) | Environment -friendly base oil system of refining | |
| CN1023005C (en) | Method for preparation of methyl acrylate and ethyl acrylate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: CHINA PETROLEUM & CHEMICAL CORPORATION Free format text: FORMER OWNER: QILU CO., LTD., CHINA PETROCHEMICAL CORP. Effective date: 20070615 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070615 Address after: 100029, No. 6, Xin Xin Street East, Beijing, Chaoyang District Patentee after: Sinopec Corp. Address before: 124 box 255400, Linzi District, Shandong, Zibo Patentee before: Sinopec Qilu Petrochemical Company |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050511 Termination date: 20131231 |