CN101525275B - Method for circularly enhancing bisphenol A concentration and reducing energy consumption by utilizing reaction solution - Google Patents
Method for circularly enhancing bisphenol A concentration and reducing energy consumption by utilizing reaction solution Download PDFInfo
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- CN101525275B CN101525275B CN2009100304152A CN200910030415A CN101525275B CN 101525275 B CN101525275 B CN 101525275B CN 2009100304152 A CN2009100304152 A CN 2009100304152A CN 200910030415 A CN200910030415 A CN 200910030415A CN 101525275 B CN101525275 B CN 101525275B
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Abstract
The invention discloses a method for circularly enhancing bisphenol A concentration and reducing energy consumption by utilizing reaction solution. The method comprises the steps as follows: delivering after reaction solution reacted by phenol and acetone through a reactor containing cation resin into vacuum for dehydration to remove the acetone, water and parts of the phenol, then delivering a mixture containing the phenol, bisphenol A and impurities to a multi-stage vacuum evaporation system to remove the phenol, delivering the bisphenol A mixture containing impurities to a falling film crystallizer, separating and obtaining high-purity bisphenol A molten solution through circulation processes of crystallization, part melting and complete melting for several times, delivering the separated impurity solution to a static crystallizer, further recovering and obtaining recovery solution with high purity of the bisphenol A, delivering the recovery solution to the falling film crystallizer for recoverying, exhausting the impurity solution from the static crystallizer, further recovering the recovery solution through a vacuum pyrolysis process, and extracting a part of materials to return to a reaction synthetic inlet after vacuum dehydration. The invention can effectively reduce energy consumption during bisphenol A production.
Description
Technical field:
The present invention relates to a kind of Production of Disphenol A technology.
Background technology:
When adopting ion method dihydroxyphenyl propane synthesis technique to prepare high-purity dihydroxyphenyl propane product; Usually adopt dihydroxyphenyl propane suspension-s crystallization method in mother liquor; The adducts solid of preparation dihydroxyphenyl propane and phenol, and then, separate the adducts crystal that obtains dihydroxyphenyl propane and phenol with centrifugal separation method; Through separating of phenol and dihydroxyphenyl propane, obtain the dihydroxyphenyl propane product.
Summary of the invention:
The object of the present invention is to provide a kind of method of reaction solution circularly enhancing bisphenol A concentration that in dihydroxyphenyl propane production, adopt to cut down the consumption of energy.
Technical solution of the present invention is:
A kind of method of reactant liquor circularly enhancing bisphenol A concentration that adopt to cut down the consumption of energy; It is characterized in that: comprise the following steps: phenol; The afterreaction liquid of acetone after by the reactor reaction that cationic ion-exchange resin is housed; Send into vacuum dehydration and remove acetone; Water and part phenol; To contain phenol again; The mixture of bisphenol-A and impurity is sent into the multi-stage vacuum vapo(u)rization system and is removed phenol; The bisphenol-A mixture that will contain impurity is afterwards sent in the falling-film crystallizer; By crystallization repeatedly; Partial melting; All fusion cyclic processes; Separate and obtain high-purity bisphenol-A fused solution; And after the impurity liquid after will separating sends into the stationary crystallization device; Further reclaim and obtain the higher recovery liquid of bisphenol-A purity; Sending into film-falling crystallization reclaims; The impurity liquid of from the stationary crystallization device, discharging further reclaims by vacuum cracking technology; Owing to do not contain bisphenol-A in the phenol liquid that reaction gets into,, after vacuum dehydration, extract one material and turn back to the synthetic import of reaction for improving reaction inlet bisphenol A concentration.
The reaction solution circulation that contains dihydroxyphenyl propane that the present invention will come out from the vacuum hydro-extraction unit turns back to the reaction synthesis unit; Improved reaction inlet bisphenol A concentration; Make that bisphenol A concentration is improved in the material after reaction back, the vacuum hydro-extraction, can reduce the inventory that gets into the multi-stage vacuum evaporation like this, and reduce phenol evaporation need quantity of steam; Reduce steam consumption, reduce the cost of whole dihydroxyphenyl propane manufacturing processed.
Because adopted vacuum-evaporation and film-falling crystallization technology, the material that gets into reaction member nearly all is a phenol liquid, bisphenol A concentration is very low in the material; Through being equipped with in the dihydroxyphenyl propane mixture that obtains after the Zeo-karb building-up reactions, the concentration of dihydroxyphenyl propane is just lower, usually about 10-12% like this; And film-falling crystallization process need phenol concentration is being carried out below 1%; So in the multi-stage vacuum evaporative process, bring up to 84-88% from 15-17%, need remove a large amount of phenol liquid in order to make bisphenol A concentration; Thereby need a large amount of steam of consumption to be used for the phenol evaporation, it is very high to prepare the Production of Disphenol A cost like this.
With the vacuum hydro-extraction of reacted dihydroxyphenyl propane solution process; Turn back in the reaction after removing water and the part phenol of acetone not reacted in the building-up reactions, generation; To improve bisphenol A concentration in the reaction feed; It is just less to get into the phenol amount that need be evaporated before the film-falling crystallization like this, and the quantity of steam that therefore consumes because of the phenol evaporation just obviously descends, and can save energy consumption.
As do not adopt dihydroxyphenyl propane solution to circulate to reaction feed; Bisphenol A concentration is below 2% in the reaction solution that supplies to react; Through bisphenol A concentration in the reacted reaction solution is 10-12%, passes through in the dihydroxyphenyl propane solution after vacuum is taken off acetone, water and part phenol again, and bisphenol A concentration is 15-17%; To be that the dihydroxyphenyl propane solution of 15-17% is brought up to concentration 84-88% with concentration, need to consume a large amount of steam.After the solution that employing contains dihydroxyphenyl propane turns back to reaction feed from vacuum hydro-extraction, supplying that bisphenol A concentration is 8-12% in the reaction solution of reaction, is 18-20% through bisphenol A concentration in the reacted reaction solution; Pass through in the dihydroxyphenyl propane solution after vacuum is taken off acetone, water and part phenol, bisphenol A concentration is 23-25%, again bisphenol A concentration is brought up to 84-88% again; The quantity of steam that needs greatly reduces; One ton of dihydroxyphenyl propane of every production, diminishbb quantity of steam is that economic benefit is obvious more than 1 ton.Simultaneously,, can reduce the evaporator plant volume of vacuum-evaporation, reduce the device fabrication expense for realizing that bisphenol A concentration is risen to 84-88% from 23-25%.
Description of drawings:
Below in conjunction with accompanying drawing and embodiment the present invention is described further.
Fig. 1 is the process flow sheet of one embodiment of the invention.
Embodiment:
A kind of method of reaction solution circularly enhancing bisphenol A concentration that adopt to cut down the consumption of energy; Comprise the following steps: phenol, the acetone afterreaction liquid after through the reactor reaction that Zeo-karb is housed is sent into vacuum hydro-extraction and removed acetone, water and part phenol, the mixture that will contain phenol, dihydroxyphenyl propane and impurity is again sent into the multi-stage vacuum vapo(u)rization system and is removed phenol; The dihydroxyphenyl propane mixture that will contain impurity is afterwards sent in the falling-film crystallizer; Crystallization through repeatedly, partial melting, all fusion working cyclees separate obtaining high-purity dihydroxyphenyl propane fused solution, and after the impurity liquid after will separating sends into the stationary crystallization device; Further reclaim and obtain the higher recovery liquid of dihydroxyphenyl propane purity; Send into film-falling crystallization and reclaim, the impurity liquid of from the stationary crystallization device, discharging further reclaims through vacuum cracking technology; Owing to do not contain dihydroxyphenyl propane in the phenol liquid that reaction gets into, for improving reaction inlet bisphenol A concentration, after vacuum hydro-extraction, extract one material and turn back to the synthetic import of reaction, in the material of reaction inlet, can keep suitable bisphenol A concentration like this.
Claims (1)
1. one kind is adopted the method for reactant liquor circularly enhancing bisphenol A concentration to cut down the consumption of energy; It is characterized in that: comprise the following steps: phenol; The afterreaction liquid of acetone after by the reactor reaction that cationic ion-exchange resin is housed; Send into vacuum dehydration and remove acetone; Water and part phenol; To contain phenol again; The mixture of bisphenol-A and impurity is sent into the multi-stage vacuum vapo(u)rization system and is removed phenol; The bisphenol-A mixture that will contain impurity is afterwards sent in the falling-film crystallizer; By crystallization repeatedly; Partial melting; All fusion cyclic processes; Separate and obtain high-purity bisphenol-A fused solution; And after the impurity liquid after will separating sends into the stationary crystallization device; Further reclaim and obtain the higher recovery liquid of bisphenol-A purity; Sending into film-falling crystallization reclaims; The impurity liquid of from the stationary crystallization device, discharging further reclaims by vacuum cracking technology; Owing to do not contain bisphenol-A in the phenol liquid that reaction gets into,, after vacuum dehydration, extract one material and turn back to the synthetic import of reaction for improving reaction inlet bisphenol A concentration.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100304152A CN101525275B (en) | 2009-04-10 | 2009-04-10 | Method for circularly enhancing bisphenol A concentration and reducing energy consumption by utilizing reaction solution |
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| CN2009100304152A CN101525275B (en) | 2009-04-10 | 2009-04-10 | Method for circularly enhancing bisphenol A concentration and reducing energy consumption by utilizing reaction solution |
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| CN101525275A CN101525275A (en) | 2009-09-09 |
| CN101525275B true CN101525275B (en) | 2012-05-23 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102320682B (en) * | 2011-08-25 | 2012-12-12 | 太原理工大学 | Method for separating and recovering crystallized phenol from phenol-containing dilute solution |
| CN105949038B (en) * | 2016-05-30 | 2018-08-03 | 南通星辰合成材料有限公司 | A kind of method that combination stationary crystallization technique promotes film-falling crystallization bisphenol-A yield |
| US10538471B2 (en) | 2016-07-22 | 2020-01-21 | Sabic Global Technologies B.V. | Manufacture of bisphenol A |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1300729A (en) * | 1999-12-23 | 2001-06-27 | 布兰科尼尔有机合成研究院 | Preparation of high purity bisphenol A |
| CN1387501A (en) * | 1999-11-11 | 2002-12-25 | 拜尔公司 | Bisphenol production |
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2009
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1387501A (en) * | 1999-11-11 | 2002-12-25 | 拜尔公司 | Bisphenol production |
| CN1300729A (en) * | 1999-12-23 | 2001-06-27 | 布兰科尼尔有机合成研究院 | Preparation of high purity bisphenol A |
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