CN1074211A - A kind of method of producing concentrated formaldehyde and industrial formol simultaneously - Google Patents
A kind of method of producing concentrated formaldehyde and industrial formol simultaneously Download PDFInfo
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- CN1074211A CN1074211A CN 92100047 CN92100047A CN1074211A CN 1074211 A CN1074211 A CN 1074211A CN 92100047 CN92100047 CN 92100047 CN 92100047 A CN92100047 A CN 92100047A CN 1074211 A CN1074211 A CN 1074211A
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Abstract
A kind of method of producing concentrated formaldehyde and industrial formol simultaneously is that the generation object height concentrated formaldehyde gas with the formaldehyde reaction device absorbs liquefaction in pipeline is passed to first absorption tower, generate high concentrated formaldehyde liquid, the gas that is not absorbed liquefaction then enters second absorption tower and carries out the secondary absorption, generates industrial formol.The gas that is not absorbed liquefaction in second absorption tower then enters the 3rd absorption tower and is absorbed into recovery liquid once more, together with the regulator solution of reactor internal cooling liquid as the second absorption tower resultant.Like this, the formaldehyde resultant is fully utilized in the reactor, is not producing high concentrated formaldehyde of production and industrial formol under the waste water situation, and work simplification.
Description
The present invention relates to the chemical industry operation technical field, belong to chemistry, metallurgical class.
Concentrated formaldehyde is the main raw material of formaldehyde derivatives, produced formaldehyde is to mix in vaporizer as the raw material mixed air with methyl alcohol, air, water vapor in the past, be passed to then in the reactor, temperature of reaction generates gaseous formaldehyde at 600～700 ℃ under the silver catalyst effect.Its main reaction formula is as follows:
In addition, also following side reaction can take place in reaction:
For preventing or reduce the generation of side reaction, and prevent that formaldehyde from decomposing, the reaction gas after the conversion is quenched to 90～95 ℃ through tubulation, enters the absorption tower then and absorbs.Generate formaldehyde liquid, unabsorbed gases then is discharged in the atmosphere after burning.In quench process, partly condensable gases condensation will be arranged, and accumulate in reactor bottom, this part phlegma was all introduced in the absorption tower through pipeline with formaldehyde in the past, and phlegma concentration is 25～35%.In the process of producing high concentrated formaldehyde, because this is the adding of lower concentration phlegma partly, will reduce the concentration of absorption liquid, and be the concentration that improves absorption liquid, just need to adopt high concentrated formaldehyde technology to produce, because gas water content reduces in the high concentrated formaldehyde, therefore blocking pipe very easily increases the escape amount in the absorption process simultaneously.So, high concentrated formaldehyde in the past all is that to adopt low concentrated formaldehyde be that industrial formol dewaters and produces, this method of producing high concentrated formaldehyde can produce the liquid that contains 10% left and right sides formaldehyde in a large number and can't handle contaminate environment.
Purpose of the present invention just provides and a kind ofly produces stable, low consumption, produces the production method of concentrated formaldehyde and industrial formol simultaneously.
The present invention is following enforcement: at first can produce 45～55%(weight according to prior art) in the unstripped gas input reactor of concentration formaldehyde, at 600～700 ℃, issue biochemical reaction in the silver catalyst effect, reaction gas after the conversion is quenched to 90～95 ℃ through tubulation, generate high concentrated formaldehyde gas, produce 25～35%(weight simultaneously) phlegma of concentration.Prior art is these two kinds of resultants to be passed in the absorption tower together absorb.The present invention then is provided with three absorption towers in the operation behind reactor, generates high concentrated formaldehyde gas and phlegma enters first absorption tower and second absorption tower by pipeline respectively at reactor.First absorption tower is provided with high concentrated formaldehyde liquid exit, gaseous formaldehyde outlet and high dense gaseous formaldehyde import, its gaseous formaldehyde outlet communicates with the gas phase import on second absorption tower, second absorption tower also is provided with industrial formol outlet, gaseous formaldehyde outlet and alkene and releases the formaldehyde import, its gaseous formaldehyde outlet communicates with the 3rd absorption tower gas phase import, the 3rd absorption tower also is provided with the outlet of recovery liquid, tail gas outlet and water inlet, reclaims the liquid outlet and communicates through the pipeline connection and with the import of second absorption tower dilution formaldehyde with the condensate outlet of reactor.The high concentrated formaldehyde liquid exit on first absorption tower can communicate with the dilution formaldehyde import on second absorption tower through pipeline, valve.Add technological operation according to the said apparatus outfit and can reach the purpose of producing concentrated formaldehyde and industrial formol simultaneously, its technical process is as follows; At first the formaldehyde reforming gas of getting to produce the control of 45～55% concentration formaldehyde processing condition according to prior art is passed in the reactor, under 600～700 ℃ of temperature of reaction, issue biochemical reaction in the silver catalyst effect, reaction gas after the conversion is quenched to 90～95 ℃ through splitting pipe, generate high concentrated formaldehyde gas, produce 25～35%(weight simultaneously) phlegma of concentration.High concentrated formaldehyde gas absorbs the dense gaseous formaldehyde import of tower height by pipeline and first and is passed to first absorption tower, can obtain being greater than or equal to 52%(weight by the prior art processes flow operations) the formaldehyde liquid of concentration, and take out from high concentrated formaldehyde liquid exit.This moment, high concentrated formaldehyde fluid temperature was controlled at more than 60 ℃, solidifies to prevent formaldehyde, and blocking pipe, preferably temperature is controlled between 60～65 ℃.Absorbing tower height concentrated formaldehyde gas first can not all liquefy, also surplus some gaseous formaldehyde, because main the absorption becomes liquid formaldehyde, therefore remaining gaseous formaldehyde concentration reduces, this part gaseous formaldehyde will enter second absorption tower by the first absorption tower gaseous formaldehyde outlet, pipeline and the second absorption tower gas phase import and carry out the secondary absorption, generation 37%(weight) industrial formol of concentration, and from industrial formol outlet taking-up, this industrial formol temperature is controlled at more than 35 ℃, is preferably between 35～40 ℃.There is not absorbed gaseous formaldehyde concentration to reduce again in second absorption tower, concentration is about 10%, enter the 3rd absorption tower by the second absorption tower gaseous formaldehyde outlet, pipeline and the 3rd absorption tower gas phase import, the 3rd absorption tower no longer is provided with the formaldehyde absorbent of existing technology, and the liquid of its guiding gaseous formaldehyde liquefaction is water; Supply with by water inlet, the 3rd absorption tower can absorb the gaseous formaldehyde that discharge on second absorption tower again.Generate the very low formaldehyde of concentration and reclaim liquid, remaining nonabsorbable gas is that tail gas is discharged to outside the native system from the tail gas outlet.The formaldehyde on the 3rd absorption tower reclaims liquid and will be passed in second absorption tower with the phlegma that reactor generates, liquid as the liquefaction of guiding gaseous formaldehyde, if this strength of fluid is low to not generating 37%(weight as guiding) formaldehyde of concentration, can absorb tower height dope body formaldehyde with first and introduce its concentration is improved.Like this, the industrial formol of 37% concentration just can be produced in second absorption tower.Like this, utilize prior art equipment,, made full use of the formaldehyde reforming gas under the waste water situation not producing, produce high concentrated formaldehyde and industrial formol simultaneously according to the configuration of aforesaid method and equipment.And produce and stablize, technology is simple, low consumption.
Fig. 1 is a process flow sheet of the present invention:
Wherein: 1, the 3rd absorption tower water inlet; 2, the 3rd tail gas from absorption tower outlet; 3 the 3rd absorption tower gas phase imports; 4 pipelines; 5, the second absorption tower gaseous formaldehyde outlet; 6 pipelines; 7, the first absorption tower gaseous formaldehyde outlet; 8 first absorb the dense gaseous formaldehyde import of tower height; 9, Reactor inlet; 10, reactor; 11, pipeline; 12, first absorption tower; 13, first absorbs tower height concentrated formaldehyde liquid exit; 14, reactor condensate outlet pipeline; 15, valve; 16, the second absorption tower gas phase import; 17, industrial formol outlet; 18, second absorption tower; 19, reclaim the liquid outlet conduit; 20, the 3rd absorption tower;
Claims (3)
1, a kind of method of producing concentrated formaldehyde and industrial formol simultaneously is can produce in the unstripped gas input reactor of 45～55% concentration formaldehyde, at 600～700 ℃, through silver catalyst effect generation chemical reaction, reaction gas after the conversion is quenched to 90～95 ℃ through tubulation, generate high concentrated formaldehyde gas, produce phlegma simultaneously; The method of producing concentrated formaldehyde and industrial formol simultaneously is characterized in that: the high dense gaseous formaldehyde and the phlegma that generate at reactor enter first absorption tower and second absorption tower by pipeline respectively, first absorption tower is provided with high concentrated formaldehyde liquid exit, gaseous formaldehyde outlet and high dense gaseous formaldehyde import, its gaseous formaldehyde outlet communicates with the gas phase import on second absorption tower, second absorption tower also is provided with the industrial formol outlet, gaseous formaldehyde outlet and the import of dilution formaldehyde, its gaseous formaldehyde outlet communicates with the 3rd absorption tower gas phase import, the 3rd absorption tower also is provided with reclaims the liquid outlet, tail gas outlet and water inlet, reclaiming the liquid outlet communicates through the pipeline connection and with the import of second absorption tower dilution formaldehyde with the condensate outlet of reactor, first absorbs tower height concentrated formaldehyde liquid exit can be through pipeline, valve communicates with the dilution formaldehyde import on second absorption tower, the high concentrated formaldehyde fluid temperature on first absorption tower is controlled at more than 60 ℃, and the industrial formol temperature on second absorption tower is controlled at more than 35 ℃.
2, according to the described a kind of method of producing concentrated formaldehyde and industrial formol simultaneously of claim 1, it is characterized in that: the high concentrated formaldehyde fluid temperature on first absorption tower is controlled between 60～65 ℃.
3, according to the described a kind of method of producing concentrated formaldehyde and industrial formol simultaneously of claim 1, it is characterized in that: the industrial formol temperature on second absorption tower is controlled between 35～45 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92100047 CN1074211A (en) | 1992-01-10 | 1992-01-10 | A kind of method of producing concentrated formaldehyde and industrial formol simultaneously |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92100047 CN1074211A (en) | 1992-01-10 | 1992-01-10 | A kind of method of producing concentrated formaldehyde and industrial formol simultaneously |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1074211A true CN1074211A (en) | 1993-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92100047 Pending CN1074211A (en) | 1992-01-10 | 1992-01-10 | A kind of method of producing concentrated formaldehyde and industrial formol simultaneously |
Country Status (1)
| Country | Link |
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| CN (1) | CN1074211A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024603B (en) * | 2007-03-29 | 2011-05-18 | 永港伟方（北京）科技股份有限公司 | Methanol absorbing system |
| CN102351668A (en) * | 2011-06-23 | 2012-02-15 | 桂林汇众化工设备有限公司 | Technology for preparing high-concentration formaldehyde by tail gas recycling method and production line device thereof |
| CN106268247A (en) * | 2015-05-22 | 2017-01-04 | 中国科学院大连化学物理研究所 | A kind of catalytic absorption method of formaldehyde |
-
1992
- 1992-01-10 CN CN 92100047 patent/CN1074211A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101024603B (en) * | 2007-03-29 | 2011-05-18 | 永港伟方（北京）科技股份有限公司 | Methanol absorbing system |
| CN102351668A (en) * | 2011-06-23 | 2012-02-15 | 桂林汇众化工设备有限公司 | Technology for preparing high-concentration formaldehyde by tail gas recycling method and production line device thereof |
| CN106268247A (en) * | 2015-05-22 | 2017-01-04 | 中国科学院大连化学物理研究所 | A kind of catalytic absorption method of formaldehyde |
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| SE01 | Entry into force of request for substantive examination | ||
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |