KR800000481B1 - Method for producing polyaluminum chloride flocculant for wastewater and water purification - Google Patents
Method for producing polyaluminum chloride flocculant for wastewater and water purification Download PDFInfo
- Publication number
- KR800000481B1 KR800000481B1 KR7901985A KR790001985A KR800000481B1 KR 800000481 B1 KR800000481 B1 KR 800000481B1 KR 7901985 A KR7901985 A KR 7901985A KR 790001985 A KR790001985 A KR 790001985A KR 800000481 B1 KR800000481 B1 KR 800000481B1
- Authority
- KR
- South Korea
- Prior art keywords
- wastewater
- polyaluminum chloride
- water purification
- aluminum chloride
- aluminum
- 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
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- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 title description 8
- 238000004519 manufacturing process Methods 0.000 title description 7
- 239000002351 wastewater Substances 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 4
- 238000000746 purification Methods 0.000 title description 3
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 24
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 12
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 5
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 5
- 235000011152 sodium sulphate Nutrition 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 4
- 238000006116 polymerization reaction Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- COOGPNLGKIHLSK-UHFFFAOYSA-N aluminium sulfide Chemical compound [Al+3].[Al+3].[S-2].[S-2].[S-2] COOGPNLGKIHLSK-UHFFFAOYSA-N 0.000 description 3
- 239000000701 coagulant Substances 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000015271 coagulation Effects 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- KZBUYRJDOAKODT-UHFFFAOYSA-N Chlorine Chemical compound ClCl KZBUYRJDOAKODT-UHFFFAOYSA-N 0.000 description 1
- -1 aluminum chloride sodium hydroxide Chemical compound 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000000693 micelle Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910001415 sodium ion Inorganic materials 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D21/00—Separation of suspended solid particles from liquids by sedimentation
- B01D21/01—Separation of suspended solid particles from liquids by sedimentation using flocculating agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
내용 없음.No content.
Description
본 발명은 폐수 및 정수용 폴리염화알미늄(Poly aluminium chloride〈PAC〉)응집제의 제조방법에 관한 것으로, 수산화 알미늄을 사용하여 중합을 달리하므로서 제조원가절감 및 응집효과를 증대하고, 특히 안정성(보존성)있는 응집제를 제조함을 목적으로 한 것이다.The present invention relates to a method for producing polyaluminum chloride (PAC) coagulant for wastewater and water purification, by increasing the production cost and coagulation effect by varying the polymerization by using aluminum hydroxide, especially a coagulant (stable) It is for the purpose of manufacturing.
종래의 폴리염화알미늄의 응집제로서 염화알미늄 제조과정에서 주원료인 알미늄 설(屑) 또는 보키사이드를 염산과 반응하여 염화알미늄을 제조하였으나, 불순물이 10-20%함유한 알미늄설 또는 보키사이드를 사용하면 순수하 염화알미늄을 제조하는데 경제성이 없으며, 또한 불순물이 10-20%잔존하기 때문에 용해성이 좋지 못할 뿐만 아니라 중합반응이 지연되고 폴리염화알미늄의 수율은 80-85%이고 그 순도가 낮으며 또 안정성이 없는 등의 결점이 있었다.As a flocculant of conventional polyaluminum chloride, aluminum chloride was prepared by reacting aluminum sulfide or bokiside, which is a main raw material, with hydrochloric acid during the production of aluminum chloride, but using aluminum sulfide or bokiside containing 10-20% of impurities It is not economical to produce pure aluminum chloride, and it has poor solubility because of 10-20% residual impurities, and also delays the polymerization reaction and yields 80-85%, low purity and stability of polyaluminum chloride. There was a flaw, such as no.
본 발명은 상기와 같은 결점을 해결하기 위하여 주원료인 수산화알미늄[Al(OH)3·χH2O] 15-20%(중량 %)에 염산(32%) 80-85%(중량 %)를 가하고 온도 60-65℃에서 1-2시간 반응시켜 염화알미늄을 제조한 다음 이 염화알미늄 85-90%(중량 %)를 반응기에 넣고 그 다음 교반하여 가성소다 5-10% 및 황산나트리움 2-6%를 넣고 온도 65-75℃에서 중합하여 pH3.0-3.5의 폐수 및 정수용 폴리염화알미늄(P.A.C)응집제의 제조방법에 관한 것으로서, 본 발명의 공정을 더욱 상술하면 다음과 같다.The present invention is added to hydrochloric acid (32%) 80-85% (weight%) to 15-20% (weight%) of aluminum hydroxide [Al (OH) 3 · χH 2 O] as the main raw material to solve the above drawbacks. The reaction was carried out at a temperature of 60-65 ° C. for 1-2 hours to prepare aluminum chloride. Then, 85-90% (wt%) of this aluminum chloride was added to the reactor, followed by stirring to obtain 5-10% of caustic soda and 2-6 of sodium sulfate. It relates to a method for producing a polyaluminum chloride (PAC) flocculant for wastewater and water purification of pH 3.0-3.5 by polymerization at a temperature of 65-75 ° C with the addition of%, the process of the present invention will be described in more detail as follows.
(1) 수산화알미늄 15-20%(중량 %)에 염산(32%) 80-85%를 가하고 온도 60-65℃에서 1-2시간 반응시켜 염화알미늄을 얻는다.(1) 15-20% (weight%) of aluminum hydroxide is added 80-85% of hydrochloric acid (32%) and reacted for 1-2 hours at 60-65 ° C to obtain aluminum chloride.
(2) 상기(1)에서 얻은 염화알미늄 85-90%와 가성소다 5-10% 및 황산나트륨 2-6%를 교반기가 부착된 반응기에 넣고 온도 65-75℃에서 2-3시간 중합시키면 pH3.0-3.5의 고순도 폴리염화알미늄 응집제가 제조되는 것으로서,(2) 85-90% of aluminum chloride, 5-10% of caustic soda and 2-6% of sodium sulfate obtained in the above (1) were added to a reactor equipped with a stirrer and polymerized at a temperature of 65-75 ° C. for 2-3 hours to obtain pH3. As 0-3.5 high purity polyaluminum chloride flocculant is prepared,
이를 반응식으로 표시하면 다음과 같다.This is expressed as a reaction scheme as follows.
본 발명의 작용효과를 상술하면 다음과 같다.The effect of the present invention will be described in detail as follows.
본 발명에서 염화알미늄가성소다 및 Na2SO4를 반응기에 투입하여 중합을 행할때의 온도는 65-75℃이며 65℃이하에서는 반응이 잘 일어나지 않으며 75℃이상에서는 염소가스가 증발할 우려가 있기 때문에 65-75℃가 가장 적합하다.In the present invention, when the aluminum chloride sodium hydroxide and Na 2 SO 4 is added to the reactor for polymerization, the temperature is 65-75 ° C. and the reaction does not occur well below 65 ° C., and chlorine gas may evaporate above 75 ° C. For this reason, 65-75 ℃ is most suitable.
또한 중합과정에서 황산나트리움의 촉진제는 중합속도를 빠르게 하고 SO4-- 이온이 안정도가 높은 폴리염화알미늄을 생성케 한다.In addition, accelerators of sodium sulfate in the polymerization process accelerate the polymerization rate and allow SO 4 ions to produce highly stable polyaluminum chloride.
그러므로 고순도의 염화알미늄을 얻을 수 있고, 수산기자체가 응집효과를 더욱 증가케 하며, 알미늄 설파이드계 및 종래의 P.A.C는 생성되는 솜모양의 침전물의 크기에 한도가 있으나, 본 발명품은 무기계 타응집제에 비하여 응결도가 크고 침전물의 양이 많다.Therefore, high purity aluminum chloride can be obtained, and the hydroxyl group itself increases the flocculation effect, and the aluminum sulfide-based and conventional PAC have limits on the size of the cotton-like precipitates produced. However, the present invention is more effective than inorganic coagulants. The degree of condensation is large and the amount of precipitate is large.
그러므로 본 발명은 종래의 방법보다 공정이 간단하여 공정시간이 단축되고 제조원가가 절감되며, 폐수의 pH조절에 따라 생성된 침전물이 일정한 시간이 경과하면 다시 부상하는 경우가 종래에는 있었으나, 본 발명품은 응결성이 강함으로 일단 침전하면 장시간 두어도 부상하는 일이 없으며, 응결도가 크므로 침전속도가 종래에 비하여 약수배로 빠르며, 수산화 알미늄을 택함으로서 이는 바로 수화축합(水和縮合) 미셀(Micell)을 형성하고 3가의 [Al(OH2)6]+++가 되어 탁입자의 표면 전위를 저하하게 하는 작용을 함으로서 응결 효과를 더욱 크게 한다. 또한 표면 전위를 저하케 하므로서 생성된 미셀은 pH5.5-7.0에서 가교(架橋)하여 [Al2(OH)2(OH)2O·(OH2)x++] 또는 [Al(OH2)O(OH2)x]m+ y와 같은 +(正)의 코로이드이온의 형태가 되어 수중에서 이와 반대 하전의 코로이드 입자를 표면에 흡착체하여 침전한다.Therefore, in the present invention, the process is simpler than the conventional method, so that the process time is shortened and the manufacturing cost is reduced, and the sediment produced by the pH control of the wastewater has risen again after a certain time, but the present invention has a condensation property. Because of this strength, once settled, it does not float for a long time, and because of its high condensation rate, the settling speed is about several times faster than the conventional one. It becomes trivalent [Al (OH 2 ) 6 ] +++ to act to lower the surface potential of the suspended particles, thereby further increasing the coagulation effect. In addition, micelles generated by lowering the surface potential were crosslinked at pH5.5-7.0 to [Al 2 (OH) 2 (OH) 2 O. (OH 2 ) x ++] or [Al (OH 2 ) O (OH 2 ) x ] m + y in the form of + (positive) of the colloid ions, the oppositely charged colloidal particles in water adsorbed on the surface to precipitate.
Na+이온의 존재로서 하전 작용에 따라 침강속도가 더욱 빠르게 된다.In the presence of Na + ions, the sedimentation rate becomes higher due to the action of charging.
본 발명을 실시예에 따라 상술하면 다음과 같다.Hereinafter, the present invention will be described in detail as follows.
[실시예 (%는 중량 %임)]EXAMPLE (% is% by weight)
(1) 수산화알미늄 15-20%에 염산(12%) 80-85%를 가하고 온도 60-65℃에서 1-2시간 반응시켜 염화알미늄을 얻는다.(1) 15-20% of aluminum hydroxide is added 80-85% of hydrochloric acid (12%) and reacted at a temperature of 60-65 ° C for 1-2 hours to obtain aluminum chloride.
(2) (1)에서 얻은 염화알미늄 85-90%와 가성소다 5-10%, 황산나트륨 2-6%를 교반기가 부착된 반응기에 넣고 65-75℃에서 2-3시간 중합시키면 pH 3-3.5의 폴리염화알미늄을 얻는다.(2) Add 85-90% of aluminum chloride, 5-10% of caustic soda, and 2-6% of sodium sulfate in (1) in a reactor equipped with a stirrer and polymerize at 65-75 ° C for 2-3 hours to obtain pH 3-3.5. Polyaluminum chloride is obtained.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR7901985A KR800000481B1 (en) | 1979-06-19 | 1979-06-19 | Method for producing polyaluminum chloride flocculant for wastewater and water purification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR7901985A KR800000481B1 (en) | 1979-06-19 | 1979-06-19 | Method for producing polyaluminum chloride flocculant for wastewater and water purification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR800000481B1 true KR800000481B1 (en) | 1980-06-04 |
Family
ID=19212013
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR7901985A Expired KR800000481B1 (en) | 1979-06-19 | 1979-06-19 | Method for producing polyaluminum chloride flocculant for wastewater and water purification |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR800000481B1 (en) |
-
1979
- 1979-06-19 KR KR7901985A patent/KR800000481B1/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19790619 |
|
| PG1605 | Publication of application before grant of patent | ||
| PC1203 | Withdrawal of no request for examination |