CN110156727A - A kind of novel two sections of solvent absorptions maleic anhydride production technique - Google Patents
A kind of novel two sections of solvent absorptions maleic anhydride production technique Download PDFInfo
- Publication number
- CN110156727A CN110156727A CN201910449005.5A CN201910449005A CN110156727A CN 110156727 A CN110156727 A CN 110156727A CN 201910449005 A CN201910449005 A CN 201910449005A CN 110156727 A CN110156727 A CN 110156727A
- Authority
- CN
- China
- Prior art keywords
- solvent
- tower
- sections
- absorption
- absorption tower
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/56—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
- C07D307/60—Two oxygen atoms, e.g. succinic anhydride
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention belongs to maleic anhydride production technical fields, and in particular to a kind of novel two sections of solvent absorptions maleic anhydride production technique.Cis-butenedioic anhydride reaction generates after gas is introduced into pre-absorption tower and tangentially mixes with solvent, pre-absorption tower tower bottom obtains one section of rich solvent, pre-absorption tower top gaseous phase enters absorption tower and obtains two sections of rich solvents after solvent absorption again, after one section of rich solvent is filtered and two sections of rich solvents are mixed into stripper, stripper overhead gaseous component returns to absorption tower, stripper bottoms material removes Analytic Tower, the crude maleic anhydride self-analytic data column overhead parsed enters refined unit, and Analytic Tower tower bottom solvent enters pre-absorption tower and recycles.The present invention can further decrease absorption tower system absorption and cooling load by two sections of solvent recoveries, and impurity removal system critical point can move forward, and avoid impurity from assembling in subsequent system, be suitble to large-scale continuity maleic anhydride production.
Description
Technical field
The invention belongs to maleic anhydride production technical fields, and in particular to a kind of novel two sections of solvent absorptions maleic anhydride production technique.
Background technique
The recovery process of cis-butenedioic anhydride generally uses water absorption or solvent absorption in existing maleic anhydride production technique.In water absorption technique
The largely sour water containing fumaric acid and acrylic acid can be generated, and water absorption technique is suitable only for intermittently operated, be unfavorable for extensive
Production, the technique are gradually eliminated.Current main maleic anhydride production technique based on solvent absorption, solvent be mainly DIBE or
DBP.Solvent reclamation is all to remove part acrylic acid, acetic acid, cis-butenedioic anhydride, butanol and the portion in cis-anhydride production process based on washing
Divide impurity such as solvent (DIBE, DBP).But some coke powders, tar class, the acrylate copolymer etc. that can be also generated in reaction process
High condensation point substance, this substance enter absorption tower by solvent absorption, subsequently enter in follow-up system and gradually assemble, and cause heat exchange system
System and parsing vacuum system obstruction, will lead to system shutdown when serious.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of novel two sections of solvent absorptions maleic anhydride production works
Skill can further decrease absorption tower system absorption and cooling load by two sections of solvent recoveries, and can be by impurity removal system
Critical point Forward, avoids impurity from assembling in subsequent system, is suitble to large-scale continuity maleic anhydride production.
Novel two sections of solvent absorptions maleic anhydride production technique of the present invention, cis-butenedioic anhydride reaction generate gas and are introduced into pre-absorption tower
It is interior tangentially mixed with solvent after, pre-absorption tower tower bottom obtains one section of rich solvent, and pre-absorption tower top gaseous phase enters absorption tower and passes through again
Two sections of rich solvents are obtained after solvent absorption, after one section of rich solvent is filtered and two sections of rich solvents are mixed into vapour
Stripper, stripper overhead gaseous component return to absorption tower, and stripper bottoms material removes Analytic Tower, the crude maleic anhydride self-analytic data parsed
Column overhead enters refined unit, and Analytic Tower tower bottom solvent enters pre-absorption tower and recycles.
The solvent is DIBE or DBP.
It include the coke powder generated in cis-butenedioic anhydride and reaction process, tar class, acrylate copolymer in one section of rich solvent
Contour condensation point substance.
The filter is the switchable filter being arranged in parallel, and one section of rich solvent after absorption enters changeable mistake
After filter filtering, the high condensation point substance such as coke powder, tar class, acrylate copolymer can be filtered, impurity can be made to move using this technique
Except system critical point moves forward, impurity is avoided to assemble in the subsequent decorum, causes heat-exchange system and parsing vacuum system obstruction, cause system
Parking.
The mixed gas that usual technique is generated using reactor outlet reaction is cooled to after gas cooler recycles heat
120~160 DEG C into absorption tower, the present invention increases by a pre-absorption facility between absorption tower and gas cooler, guarantee mix
Absorption tower feeding temperature is reduced in the case where more than gas dewpoint as far as possible, so that the solvent circulating cooling for reducing absorption tower is negative
Lotus.Solvent quality in the pre-absorption tower is the temperature of 1/4~1/3 Analytic Tower tower bottom solvent of Analytic Tower tower bottom solvent quality
Degree is 185~200 DEG C, and solvent self-analytic data tower bottom can be followed after metering extraction without the cooling absorbent directly as pre-absorption tower
Ring uses.
It is 140~170 DEG C that the reaction, which generates temperature of the gas before entering pre-absorption tower,.
Preferably, novel two sections of solvent absorptions maleic anhydride production technique, comprising the following steps:
(1) cis-butenedioic anhydride reaction generates reacted the generations gas pipeline of gas from the charging of pre-absorption tower lower part, and solvent is from pre-absorption tower tower
Top material inlet, reaction generate gas and tangentially mix in pre-absorption tower with solvent；
(2) pre-absorption tower internal solvent mutually enters absorption tower through molten through gas-liquid separation tower overhead gas to after reaction generation gas pre-absorption
Agent absorbs again, and pre-absorption tower tower bottom is to absorb one section of rich solvent of cis-butenedioic anhydride and high condensation point substance；
(3) top gaseous phase enters exhaust gas treatment unit after the completion of the absorption tower described in absorbs, and absorbing tower bottom is to inhale again
Two sections of rich solvents of cis-butenedioic anhydride are received；
After (4) one sections of rich solvents are filtered and two sections of rich solvents are mixed into stripper, stripper overhead gas phase
Component returns in absorption tower, and stripper bottoms material enters Analytic Tower, and parsing column overhead is that crude maleic anhydride product enters refined unit,
Analytic Tower tower bottom solvent enters pre-absorption tower by solvent line and recycles.
In above-mentioned technique, the connection between pre-absorption tower and absorption tower is as short as possible, and the gas phase of pre-absorption tower fully enters
It is reabsorbed behind absorption tower, solves pre-absorption process solvent entrainment problem that may be present, avoid solvent loss.
General gas flow cooler using boiler water heat, because have subsequent pre-absorption facility can in various degree raising again into
The temperature of charge on absorption tower, so the heat that leading portion as much as possible can produce reaction product and carry secretly, the present invention can increase reaction
The recycling (at least 20 DEG C of heats of reaction gas) of heat, the heat for generating reaction is most of to be utilized in leading portion, reduces later use
Circulating water takes the load of heat.
Compared with prior art, beneficial effects of the present invention are as follows:
(1) present invention can make impurity removal system critical point move forward, and avoid impurity from assembling in the subsequent decorum, cause heat-exchange system
And parsing vacuum system obstruction, cause system shutdown.
(2) present invention avoids Segmentation stripping and causes primary equipment investment waste, pre-suction by two sections of solvent mixing strippings
It receives tower to be arranged before absorption tower, cis-butenedioic anhydride 30% can be absorbed in advance, remove mechanical admixture 90%.
(3) one section of solvent system of the invention be separately provided can online switch filtering facility, whole process switching is not parking, can
It substantially improves maleic anhydride unit and runs the status for needing cleaning during shutdown system for 6~8 months.
(4) present invention can be further decreased absorption tower system absorption and cooling load, be reduced absorption tower using two sections of absorptions
Making in site installation difficulty.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention；
In figure；1, reaction generates gas pipeline；2, pre-absorption tower；3, filter；4, stripper；5, Analytic Tower；6, purification is single
Member；7, absorption tower；8, exhaust gas treatment unit；9, solvent line.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated.
Embodiment 1
A kind of novel two sections of solvent absorptions maleic anhydride production technique, comprising the following steps:
(1) reaction of 150 DEG C of cis-butenedioic anhydride is generated into reacted the generations gas pipeline 1 of gas from the charging of 2 lower part of pre-absorption tower, solvent from
The charging of 2 tower top of pre-absorption tower, reaction generate gas and tangentially mix in pre-absorption tower 2 with solvent；
(2) 2 internal solvent of pre-absorption tower enters absorption tower 7 to top gaseous phase after reaction generation gas pre-absorption and inhales again through solvent
It receives, 2 tower bottom of pre-absorption tower is to absorb one section of rich solvent of cis-butenedioic anhydride and high condensation point substance；
(3) top gaseous phase enters exhaust gas treatment unit 8 after the completion of the absorption tower 7 described in absorbs, and 7 tower bottom of absorption tower is again
Absorb two sections of rich solvents of cis-butenedioic anhydride；
(4) one sections of rich solvents are mixed into stripper 4,4 tower overhead gas of stripper with two sections of rich solvents after the filtering of filter 3
Phase component returns in absorption tower 7, and 4 materials at bottom of tower of stripper enters Analytic Tower 5, and 5 tower top of Analytic Tower is that crude maleic anhydride product enters essence
Unit 6 processed, 5 tower bottom solvent of Analytic Tower are recycled by solvent line 9 into pre-absorption tower 2.
After measured, the rate of recovery of cis-butenedioic anhydride is 99.6% or more.
Embodiment 2
A kind of novel two sections of solvent absorptions maleic anhydride production technique, comprising the following steps:
(1) reaction of 170 DEG C of cis-butenedioic anhydride is generated into reacted the generations gas pipeline 1 of gas from the charging of 2 lower part of pre-absorption tower, solvent from
The charging of 2 tower top of pre-absorption tower, reaction generate gas and tangentially mix in pre-absorption tower 2 with solvent；
(2) 2 internal solvent of pre-absorption tower enters absorption tower 7 to top gaseous phase after reaction generation gas pre-absorption and inhales again through solvent
It receives, 2 tower bottom of pre-absorption tower is to absorb one section of rich solvent of cis-butenedioic anhydride and high condensation point substance；
(3) top gaseous phase enters exhaust gas treatment unit 8 after the completion of the absorption tower 7 described in absorbs, and 7 tower bottom of absorption tower is again
Absorb two sections of rich solvents of cis-butenedioic anhydride；
(4) one sections of rich solvents are mixed into stripper 4,4 tower overhead gas of stripper with two sections of rich solvents after the filtering of filter 3
Phase component returns in absorption tower 7, and 4 materials at bottom of tower of stripper enters Analytic Tower 5, and 5 tower top of Analytic Tower is that crude maleic anhydride product enters essence
Unit 6 processed, 5 tower bottom solvent of Analytic Tower are recycled by solvent line 9 into pre-absorption tower 2.
After measured, the rate of recovery of cis-butenedioic anhydride is 99.7% or more.
Certainly, above content is only presently preferred embodiments of the present invention, be should not be construed as limiting to implementation of the invention
Example range.The present invention is also not limited to the example above, and those skilled in the art are in essential scope of the invention
Interior made all the changes and improvements etc., should all belong in patent covering scope of the invention.
Claims (8)
1. a kind of novel two sections of solvent absorptions maleic anhydride production technique, it is characterised in that: cis-butenedioic anhydride reaction generates gas and is introduced into pre-absorption
After tangentially mixing in tower with solvent, pre-absorption tower tower bottom obtains one section of rich solvent, and pre-absorption tower top gaseous phase enters absorption tower again
Two sections of rich solvents are obtained after solvent absorption, one section of rich solvent is mixed into after being filtered with two sections of rich solvents
Stripper, stripper overhead gaseous component return to absorption tower, and stripper bottoms material removes Analytic Tower, and the crude maleic anhydride parsed self solves
Analysis column overhead enters refined unit, and Analytic Tower tower bottom solvent enters pre-absorption tower and recycles.
2. novel two sections of solvent absorptions maleic anhydride production technique according to claim 1, it is characterised in that: the solvent is
DIBE or DBP.
3. novel two sections of solvent absorptions maleic anhydride production technique according to claim 1, it is characterised in that: a Duan Fu
It include cis-butenedioic anhydride and high condensation point substance in solvent.
4. novel two sections of solvent absorptions maleic anhydride production technique according to claim 1, it is characterised in that: the filter
For the switchable filter being arranged in parallel.
5. novel two sections of solvent absorptions maleic anhydride production technique according to claim 1, it is characterised in that: the pre-absorption
Solvent quality in tower is the 1/4~1/3 of Analytic Tower tower bottom solvent quality.
6. novel two sections of solvent absorptions maleic anhydride production technique according to claim 1, it is characterised in that: the Analytic Tower
The temperature of tower bottom solvent is 185~200 DEG C.
7. novel two sections of solvent absorptions maleic anhydride production technique according to claim 1, it is characterised in that: the reaction is raw
Temperature at gas is 140~170 DEG C.
8. novel two sections of solvent absorptions maleic anhydride production technique according to claim 1, it is characterised in that: including following step
It is rapid:
(1) cis-butenedioic anhydride reaction generate reacted the generations gas pipeline of gas from pre-absorption tower lower part charging, solvent from pre-absorption tower tower top into
Material, reaction generate gas and tangentially mix in pre-absorption tower with solvent；
(2) pre-absorption tower internal solvent enters absorption tower to top gaseous phase after reaction generation gas pre-absorption and absorbs again through solvent, in advance
Absorbing tower bottom is to absorb one section of rich solvent of cis-butenedioic anhydride and high condensation point substance；
(3) top gaseous phase enters exhaust gas treatment unit after the completion of the absorption tower described in absorbs, and absorbing tower bottom is to absorb again
Two sections of rich solvents of cis-butenedioic anhydride；
After (4) one sections of rich solvents are filtered and two sections of rich solvents are mixed into stripper, stripper overhead gaseous component
It returns in absorption tower, stripper bottoms material enters Analytic Tower, and parsing column overhead is that crude maleic anhydride product enters refined unit, parses
Tower tower bottom solvent enters pre-absorption tower and recycles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910449005.5A CN110156727A (en) | 2019-05-28 | 2019-05-28 | A kind of novel two sections of solvent absorptions maleic anhydride production technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910449005.5A CN110156727A (en) | 2019-05-28 | 2019-05-28 | A kind of novel two sections of solvent absorptions maleic anhydride production technique |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110156727A true CN110156727A (en) | 2019-08-23 |
Family
ID=67629102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910449005.5A Withdrawn CN110156727A (en) | 2019-05-28 | 2019-05-28 | A kind of novel two sections of solvent absorptions maleic anhydride production technique |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110156727A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110721555A (en) * | 2019-11-12 | 2020-01-24 | 中建安装集团有限公司 | Device and process for purifying maleic anhydride by novel solvent absorption method |
| CN115925659A (en) * | 2022-12-13 | 2023-04-07 | 新疆至臻化工工程研究中心有限公司 | Method for pretreating maleic anhydride absorption liquid |
-
2019
- 2019-05-28 CN CN201910449005.5A patent/CN110156727A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110721555A (en) * | 2019-11-12 | 2020-01-24 | 中建安装集团有限公司 | Device and process for purifying maleic anhydride by novel solvent absorption method |
| CN115925659A (en) * | 2022-12-13 | 2023-04-07 | 新疆至臻化工工程研究中心有限公司 | Method for pretreating maleic anhydride absorption liquid |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107118083B (en) | Device and method for refining and separating polymethoxy dimethyl ether containing formaldehyde | |
| CN110156727A (en) | A kind of novel two sections of solvent absorptions maleic anhydride production technique | |
| CN106349190A (en) | Method for extracting ketene dimer by rectifying residues and pumped liquid | |
| CN103261454A (en) | Process and plant for treating ore concentrate particles containing valuable metal | |
| CN105111171B (en) | Using hexahydro-phthalic acid diisobutyl ester as the technique of solvent recovery cis-butenedioic anhydride | |
| CN107827847B (en) | System and method for continuously preparing furfural by utilizing lignocellulose raw material | |
| CN102530893B (en) | Nitric acid extraction and concentration method | |
| CN108676581A (en) | A kind of entrained flow bed gasification system and method | |
| CN201775977U (en) | Treatment device for reaction tail gas in trimellitic acid production | |
| CN115650841B (en) | Method for synthesizing acetic acid by methanol low-pressure carbonyl | |
| CN107011159B (en) | The processing method and processing device of residue in a kind of acetic acid refining and recovery system | |
| CN104232133A (en) | Method and device for reducing potassium and sodium ion content of coal tar | |
| CN104415571A (en) | Device and method for continuously purifying vulcanization accelerator-2-mercaptobenzothiazole | |
| US20140001098A1 (en) | Method and Device for Enclosed Recycling of Oil-Water-Sludge in Oil Shale Dry Distillation System | |
| CN210356589U (en) | Maleic anhydride device solvent recovery system | |
| CN208545367U (en) | A kind of entrained flow bed gasification system | |
| CN104492412B (en) | A kind of preparation method of oil deacidifying catalyst | |
| CN206624835U (en) | New type of airflow bed gasifying apparatus | |
| CN110339674A (en) | Maleic anhydride unit solvent recovering system | |
| CN221155420U (en) | Acetic anhydride reduced pressure distillation separator | |
| CN220940659U (en) | Slag slurry treatment device for silane production | |
| CN114835604B (en) | Cyclohexanone ammoximation production system and method | |
| CN109536716A (en) | Gu arsenic removing method of the arsenic containing Copper Slag | |
| CN115057568B (en) | Method for treating ammonium paratungstate crystallization mother liquor | |
| CN115672249B (en) | System, method and application for preparing isopropyl ether through isopropanol etherification reaction rectification |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190823 |
|
| WW01 | Invention patent application withdrawn after publication |