CN204058303U - A kind of purifying plant of sodium formiate - Google Patents
A kind of purifying plant of sodium formiate Download PDFInfo
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- CN204058303U CN204058303U CN201420427062.6U CN201420427062U CN204058303U CN 204058303 U CN204058303 U CN 204058303U CN 201420427062 U CN201420427062 U CN 201420427062U CN 204058303 U CN204058303 U CN 204058303U
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- whizzer
- tank
- sodium formiate
- moisture eliminator
- pipeline communication
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Abstract
The utility model discloses a kind of purifying plant of sodium formiate, comprise the first whizzer, the first moisture eliminator, recrystallization tank, the second whizzer, tetramethylolmethane recrystallization tank, bleacher, filter press device, sodium formiate mother liquor concentrations tank, the second moisture eliminator, dissolving vessel, solvent receiving tank, water ice condenser and recirculated water cooling condenser; Solvent receiving tank, dissolving vessel, the first whizzer, the first moisture eliminator, recrystallization tank, the second whizzer and tetramethylolmethane recrystallization tank pipeline communication in turn; First whizzer and the second moisture eliminator pipeline communication; Second whizzer, bleacher, filter press device and sodium formiate mother liquor concentrations tank pipeline communication in turn; Recirculated water cooling condenser and water ice condenser pipeline communication; Recirculated water cooling condenser and water ice condenser respectively with solvent receiving tank pipeline communication; First moisture eliminator and the second moisture eliminator respectively with circulating water condensing device pipeline communication.Sodium formiate is purified to 99.5% or higher by the utility model, and has reclaimed part tetramethylolmethane.
Description
Technical field
The utility model relates to a kind of purifying plant of sodium formiate.
Background technology
Sodium formiate is a kind of important organic raw material, has another name called sodium formate, and outward appearance is white crystalline powder.Sodium formiate is widely used in printing and dyeing, the chemical production field such as organic synthesis, medicine, as can be used as the rawhide treatment agent of leather industry, the dye leveller of dope dyeing industry, the promotor of electroplating industry, the matting agent etc. of artificial silk industry, also can be used as the main raw material producing formic acid and oxalic acid, is also the raw material producing vat powder.It is reported that national sodium formiate ultimate production is about 200KT.Current sodium formiate main production process has carbon monoxide synthesis method and byproduct of polyhydric alcohol method.
Carbon monoxide synthesis method: use coke is raw material, through the technique such as gas making dedusting, washing, decarburization, again dedusting, obtain the CO (carbon monoxide converter) gas needed for technique, then after heating and pressurizing and sodium hydroxide are reacted and generated sodium formate solution, through evaporation, be separated, dryly generate solid phase prod sodium formiate.This technique is the technique of professional production sodium formiate.Advantage is due to not containing other alcohols, produces carboxylic acid Yield high; The colourity of this process purity more than 97% is also relatively good, and export volume is larger.But due to coal resources reason, its industrial scale is restricted, processing unit is backward, product is single, water power vapour cost is high, lack competitiveness.
Byproduct of polyhydric alcohol method: adopt acetaldehyde/butyraldehyde-n/isobutyric aldehyde and formalin and excessive formaldehyde that Cannizzaro's reaction occurs to intersect under basic conditions and generate the polyvalent alcohol of tetramethylolmethane/TriMethylolPropane(TMP)/neopentyl glycol.Along with developing rapidly of China's polyvalent alcohol industry, the amount of whole nation neopentyl glycol, tetramethylolmethane, TriMethylolPropane(TMP) byproduct sodium formiate is more than 80,000 tons, and polyvalent alcohol production plant to the processing mode that polyvalent alcohol mother liquor is conventional is: through concentrated, crystallization, centrifugation, obtain sodium formiate solid.For sodium formiate, traditional employing sodium legal system gets tetramethylolmethane and byproduct, wherein, the byproduct that sodium formiate produces for sodium method production tetramethylolmethane, Production of pentaerythritol technique is got in sodium legal system, due to the restriction of tripping device and condition, the sodium formiate content separated is 88%-92%, the moisture controlled of sodium formiate is about 1.5%, other organism tetramethylolmethane and dipentaerythritol content are 3%-10%, the organism such as tetramethylolmethane and dipentaerythritol is not separated, and is present in sodium formiate product with the form of impurity.Tetramethylolmethane in sodium formiate is separated into the difficult point that sodium method produces a kind of key of tetramethylolmethane, the existence one of tetramethylolmethane is the lifting having a strong impact on sodium formiate product content, this thick sodium formiate solid color is darker, be generally tawny, with strong organism smell, easy caking, can not unrestricted flow.Two is that a large amount of tetramethylolmethanes is taken away by sodium formiate product, and sodium formiate product, well below the price of tetramethylolmethane, brings serious financial loss to enterprise.Therefore; it is high to there is energy consumption in current employing byproduct of polyhydric alcohol sodium formiate production technique; production cost is high; sodium formiate content can not meet the demand in market; the market competitiveness is poor, and along with the growing tension of world resource, the strategy of sustainable development is more and more paid attention to; country also promotes recycling economy energetically and reduces energy consumption, reserved resource.Given this improve sodium formiate content further and reduce production cost and have great meaning to enterprise's raising market competitiveness.
Utility model content
In order to overcome deficiency of the prior art, the utility model provides a kind of purifying plant of sodium formiate.
For solving the problem, the utility model adopts following technical scheme:
A purifying plant for sodium formiate, comprises the first whizzer, the first moisture eliminator, recrystallization tank, the second whizzer, tetramethylolmethane recrystallization tank, bleacher, filter press device, sodium formiate mother liquor concentrations tank, the second moisture eliminator, dissolving vessel, solvent receiving tank, water ice condenser and recirculated water cooling condenser; Solvent receiving tank, dissolving vessel, the first whizzer, the first moisture eliminator, recrystallization tank, the second whizzer and tetramethylolmethane recrystallization tank pipeline communication in turn; First whizzer and the second moisture eliminator pipeline communication; Second whizzer, bleacher, filter press device and sodium formiate mother liquor concentrations tank pipeline communication in turn; Recirculated water cooling condenser and water ice condenser pipeline communication; Recirculated water cooling condenser and water ice condenser respectively with solvent receiving tank pipeline communication; First moisture eliminator and the second moisture eliminator respectively with circulating water condensing device pipeline communication.
Above-mentioned tetramethylolmethane recrystallization tank is preferably the tetramethylolmethane recrystallization tank of original system in Production of pentaerythritol.
During use, after being concentrated by residual mother liquor high-temperature pressure-reduction in tetramethylolmethane preparation process, the organic 88%-92% sodium formiate of about 3%-10% that contains of centrifuging gained is transferred to dissolving vessel while hot, the setting of dissolving vessel is to wash the impurity removed in sodium formiate, then gained is entered the first whizzer, the first filtrate and first filter cake two portions are obtained after centrifugal, the first filter cake part is wherein sodium formiate, first filter cake be sent to the second moisture eliminator dry more than 99.5% sodium formiate, first filtrate is then after the first moisture eliminator drying, enter recrystallization tank to add appropriate distilled water and carry out recrystallization, and then the mixture after recrystallization is sent into the second whizzer, the second filtrate and second filter cake two portions are obtained after centrifugal, wherein the second filter cake is the organism such as tetramethylolmethane and dipentaerythritol, second filter cake is sent to tetramethylolmethane recrystallization tank and carries out recrystallization, second filtrate is then decoloured by through bleacher, sodium formiate mother liquor concentrations tank is sent to after the press filtration of filter press device, wherein bleacher is preferably activated carbon decolorizing, the object of filter press device removes the solid impurities such as gac, the object of recrystallization tank is in order to reuse tetramethylolmethane and sodium formiate contained in the organic substances such as tetramethylolmethane is washed till in filtrate, not only ensure that the purity of sodium formiate, and improve the yield of tetramethylolmethane, the dry gas that first moisture eliminator and the second moisture eliminator produce in drying process flows to reuse in solvent receiving tank after being sent to recirculated water cooling condenser and water ice condenser condensation.
Above-mentioned recrystallization adds tetramethylolmethane output, reduces the production cost of whole tetramethylolmethane technique, reduces the steam energy consumption of Production of pentaerythritol; Preferably, the second filtrate is transferred to bleacher and carries out activated carbon 60-75 DEG C of decolouring 2 hours, and after decolouring press filtration, filtrate is transferred to first mother liquid of sodium concentration tank and carries out concentration.
Use said apparatus can obtain 99.5% or more highly purified sodium formiate, make the tetramethylolmethane in residual mother liquor obtain further recycling simultaneously, improve the yield of tetramethylolmethane, and the waste gas produced in process is obtained effective reuse, not only avoid environmental pollution, and reduce cost.
Dissolving vessel and circulating water condensing device pipeline communication.The organic solvent volatilized in dissolving vessel can be made like this to obtain further reuse, meanwhile, further avoid environmental pollution.
Second moisture eliminator is positioned at the below of the first whizzer, and tetramethylolmethane recrystallization tank is positioned at the below of the second whizzer, and recrystallization tank is positioned at the below of the first moisture eliminator.Such setting can time centrifugal rear generation filter cake enter the second moisture eliminator or tetramethylolmethane recrystallization tank under gravity smoothly, without the need to by other external force.
The pipeline that recirculated water cooling condenser is communicated with water ice condenser is provided with flow control valve.Carry out the opening degree of adjust flux variable valve according to the actual condensation situations of recirculated water cooling condenser, avoid the waste of the energy.
First whizzer is with vacuum suction device.Can make so centrifugal after filter cake liquid holdup reduce, reduce organic impurity content in filter cake, improve the purity of gained sodium formiate further.
Preferably, the first moisture eliminator and the second moisture eliminator are airtight rake type dryer.Further preferably, the connecting pipe between each parts is equipped with variable valve.This device also can set up various transferpump as required.
The NM technology of the utility model is prior art.
The purifying plant of the utility model sodium formiate achieves separating formic sodium and tetramethylolmethane type organic from low levels sodium formiate product, improve sodium formiate product content and quality, not only expand the Application Areas of sodium formiate, and improve sodium formiate selling price, enhance the market competitiveness; With traditional from compared with tetramethylolmethane byproduct sodium formate, the present invention not only effectively purifying formic acid sodium purity to 99.5% or higher, and part tetramethylolmethane has been reclaimed from sodium formiate filter cake, and recycle achieves waste liquid, zero waste gas emission in the sepn process of purifying formic acid sodium, and this technical process is simple, workable, for realizing Business Economic Benefit and environmental benefit has great meaning, be worthy to be popularized.
Accompanying drawing explanation
Fig. 1 is the purifying plant structural representation of the utility model sodium formiate.
In figure, 1 is the first whizzer, 2 be the first moisture eliminator, 3 attach most importance to crystallizer, 4 be the second whizzer, 5 be tetramethylolmethane recrystallization tank, 6 be bleacher, 7 be filter press device, 8 be dissolving vessel for first mother liquid of sodium concentration tank, 9 is the second airtight rake type dryer, 10,11 be solvent receiving tank, 12 be water ice condenser, 13 be recirculated water cooling condenser, 14 be the first filter cake, 15 be the first filtrate, 16 to be the second filter cake, 17 be the second filtrate, 18 for emptying, 19 be the 3rd filtrate, 20 is the 3rd filter cake.
Embodiment
In order to understand the utility model better, illustrate content of the present utility model further below in conjunction with embodiment, but content of the present utility model is not only confined to the following examples.
Embodiment 1
The purifying plant of sodium formiate as shown in Figure 1, comprises the first whizzer, the first moisture eliminator, recrystallization tank, the second whizzer, tetramethylolmethane recrystallization tank, bleacher, filter press device, sodium formiate mother liquor concentrations tank, the second moisture eliminator, dissolving vessel, solvent receiving tank, water ice condenser and recirculated water cooling condenser; Solvent receiving tank, dissolving vessel, the first whizzer, the first moisture eliminator, recrystallization tank, the second whizzer and tetramethylolmethane recrystallization tank pipeline communication in turn, tetramethylolmethane recrystallization tank is positioned at the below of the second whizzer, and recrystallization tank is positioned at the below of the first moisture eliminator; First whizzer and the second moisture eliminator pipeline communication, the second moisture eliminator is positioned at the below of the first whizzer, and the first whizzer is with vacuum suction device; Second whizzer, bleacher, filter press device and sodium formiate mother liquor concentrations tank pipeline communication in turn; Recirculated water cooling condenser and water ice condenser pipeline communication, the pipeline that recirculated water cooling condenser is communicated with water ice condenser is provided with flow control valve; Recirculated water cooling condenser and water ice condenser respectively with solvent receiving tank pipeline communication; Dissolving vessel, the first moisture eliminator and the second moisture eliminator respectively with circulating water condensing device pipeline communication.First moisture eliminator and the second moisture eliminator are airtight rake type dryer; Bleacher is activated carbon decolorizing tank.
During use, after being concentrated by residual mother liquor high-temperature pressure-reduction in tetramethylolmethane preparation process, the organic 88%-92% sodium formiate of about 3%-10% that contains of centrifuging gained is transferred to dissolving vessel while hot, the setting of dissolving vessel is to wash the impurity removed in sodium formiate, then gained is entered the first whizzer, the first filtrate and first filter cake two portions are obtained after centrifugal, the first filter cake part is wherein sodium formiate, first filter cake be sent to the second moisture eliminator dry more than 99.5% sodium formiate, first filtrate is then after the first moisture eliminator drying, enter recrystallization tank to add appropriate distilled water and carry out recrystallization, and then the mixture after recrystallization is sent into the second whizzer, the second filtrate and second filter cake two portions are obtained after centrifugal, wherein the second filter cake is the organism such as tetramethylolmethane and dipentaerythritol, second filter cake is sent to tetramethylolmethane recrystallization tank and carries out recrystallization, second filtrate is then decoloured by through bleacher, sodium formiate mother liquor concentrations tank is sent to after the press filtration of filter press device, wherein bleacher is preferably activated carbon decolorizing, the object of filter press device removes the solid impurities such as gac, the object of recrystallization tank is in order to reuse tetramethylolmethane and sodium formiate contained in the organic substances such as tetramethylolmethane is washed till in filtrate, not only ensure that the purity of sodium formiate, and improve the yield of tetramethylolmethane, the dry gas that first moisture eliminator and the second moisture eliminator produce in drying process flows to reuse in solvent receiving tank after being sent to recirculated water cooling condenser and water ice condenser condensation.
Claims (7)
1. a purifying plant for sodium formiate, is characterized in that: comprise the first whizzer, the first moisture eliminator, recrystallization tank, the second whizzer, tetramethylolmethane recrystallization tank, bleacher, filter press device, sodium formiate mother liquor concentrations tank, the second moisture eliminator, dissolving vessel, solvent receiving tank, water ice condenser and recirculated water cooling condenser; Solvent receiving tank, dissolving vessel, the first whizzer, the first moisture eliminator, recrystallization tank, the second whizzer and tetramethylolmethane recrystallization tank pipeline communication in turn; First whizzer and the second moisture eliminator pipeline communication; Second whizzer, bleacher, filter press device and sodium formiate mother liquor concentrations tank pipeline communication in turn; Recirculated water cooling condenser and water ice condenser pipeline communication; Recirculated water cooling condenser and water ice condenser respectively with solvent receiving tank pipeline communication; First moisture eliminator and the second moisture eliminator respectively with circulating water condensing device pipeline communication.
2. the purifying plant of sodium formiate as claimed in claim 1, is characterized in that: dissolving vessel and circulating water condensing device pipeline communication.
3. the purifying plant of sodium formiate as claimed in claim 1 or 2, it is characterized in that: the second moisture eliminator is positioned at the below of the first whizzer, tetramethylolmethane recrystallization tank is positioned at the below of the second whizzer, and recrystallization tank is positioned at the below of the first moisture eliminator.
4. the purifying plant of sodium formiate as claimed in claim 1 or 2, is characterized in that: the pipeline that recirculated water cooling condenser is communicated with water ice condenser is provided with flow control valve.
5. the purifying plant of sodium formiate as claimed in claim 1 or 2, is characterized in that: the first whizzer is with vacuum suction device.
6. the purifying plant of sodium formiate as claimed in claim 1 or 2, is characterized in that: the first moisture eliminator and the second moisture eliminator are airtight rake type dryer.
7. the purifying plant of sodium formiate as claimed in claim 1 or 2, is characterized in that: bleacher is activated carbon decolorizing tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420427062.6U CN204058303U (en) | 2014-07-30 | 2014-07-30 | A kind of purifying plant of sodium formiate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420427062.6U CN204058303U (en) | 2014-07-30 | 2014-07-30 | A kind of purifying plant of sodium formiate |
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| Publication Number | Publication Date |
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| CN204058303U true CN204058303U (en) | 2014-12-31 |
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| CN201420427062.6U Expired - Fee Related CN204058303U (en) | 2014-07-30 | 2014-07-30 | A kind of purifying plant of sodium formiate |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106146293A (en) * | 2016-05-20 | 2016-11-23 | 百川化工(如皋)有限公司 | Process for reducing color number of sodium formate |
| CN107501137A (en) * | 2017-08-29 | 2017-12-22 | 东明俱进化工有限公司 | The purifying technique and its equipment of a kind of lithium dodecyl sulfate |
| CN112979454A (en) * | 2021-03-09 | 2021-06-18 | 湖北楚星化工股份有限公司 | High-temperature impurity removal system and method for mother liquor in process of producing sodium formate from pentaerythritol |
-
2014
- 2014-07-30 CN CN201420427062.6U patent/CN204058303U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106146293A (en) * | 2016-05-20 | 2016-11-23 | 百川化工(如皋)有限公司 | Process for reducing color number of sodium formate |
| CN107501137A (en) * | 2017-08-29 | 2017-12-22 | 东明俱进化工有限公司 | The purifying technique and its equipment of a kind of lithium dodecyl sulfate |
| CN107501137B (en) * | 2017-08-29 | 2023-09-05 | 东明俱进化工有限公司 | Purification process and equipment for lithium dodecyl sulfate |
| CN112979454A (en) * | 2021-03-09 | 2021-06-18 | 湖北楚星化工股份有限公司 | High-temperature impurity removal system and method for mother liquor in process of producing sodium formate from pentaerythritol |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20190730 |
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| CF01 | Termination of patent right due to non-payment of annual fee |