FR2760002A1 - METHOD FOR MANUFACTURING MIXED COAGULANTS FOR CLARIFYING WATER, MIXED COAGULANTS OBTAINED BY THIS PROCESS AND METHOD FOR CLARIFYING WATER WITH SAID MIXED COAGULANTS - Google Patents
METHOD FOR MANUFACTURING MIXED COAGULANTS FOR CLARIFYING WATER, MIXED COAGULANTS OBTAINED BY THIS PROCESS AND METHOD FOR CLARIFYING WATER WITH SAID MIXED COAGULANTS Download PDFInfo
- Publication number
- FR2760002A1 FR2760002A1 FR9702471A FR9702471A FR2760002A1 FR 2760002 A1 FR2760002 A1 FR 2760002A1 FR 9702471 A FR9702471 A FR 9702471A FR 9702471 A FR9702471 A FR 9702471A FR 2760002 A1 FR2760002 A1 FR 2760002A1
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- FR
- France
- Prior art keywords
- water
- mixed
- coagulants
- clarifying water
- clarifying
- 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.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
Procédé de fabrication de coagulants mixtes pour clarifier l'eau, dans lequel on ajoute à une solution d'un coagulant inorganique de clarification de l'eau, maintenue à une température comprise entre 25 et 80 degreC, au moins une quantité d'un polymère cationique soluble dans l'eau, provenant d'un ou plusieurs monomère (s) vinylique (s) , telle que ledit polymère représente entre 0, 1 et 10 % du poids total du produit final, ladite solution étant agitée pendant au moins 15 minutes à une température supérieure à la température ambiante avant d'être refroidie puis filtrée.Application : épuration de l'eau.Process for the manufacture of mixed coagulants for clarifying water, in which is added to a solution of an inorganic coagulant for clarifying water, maintained at a temperature between 25 and 80 degreC, at least an amount of a polymer cationic soluble in water, originating from one or more vinyl monomer (s), such that said polymer represents between 0.1 and 10% of the total weight of the final product, said solution being stirred for at least 15 minutes at a temperature above ambient temperature before being cooled and then filtered.Application: water purification.
Description
"PROCEDE DE FABRICATION DE COAGULANTS MIXTES
POUR CLARIFIER L'EAU,
COAGULANTS MIXTES OBTENUS PAR CE PROCEDE
ET METHODE DE CLARIFICATION DE L'EAU
AVEC LESDITS COAGULANTS MIXTES"
L'eau brute contient différents polluants qui doivent être éliminés pour obtenir de l'eau Potable."PROCESS FOR THE MANUFACTURE OF MIXED COAGULANTS
TO CLARIFY THE WATER,
MIXED COAGULANTS OBTAINED BY THIS PROCESS
AND METHOD FOR CLARIFYING WATER
WITH THE SAID MIXED COAGULANTS "
Raw water contains various pollutants which must be removed to obtain potable water.
Parmi les polluants les plus courants, on peut citer les substances organiques, par exemple, les acides humiques, les cations, par exemple Fe++, les anions, par exemple, SO4 , etc.Among the most common pollutants, mention may be made of organic substances, for example, humic acids, cations, for example Fe ++, anions, for example, SO4, etc.
Un procédé usuel de clarification des eaux pénétrant dans les stations de traitement d'eau potable, chargées des polluants cités, comprend le dosage de coagulants à base de sels d'aluminium et de fer, du type sulfate d'aluminium, sulfate de fer, chlorure de fer, polyhydroxychlorure d'aluminium, ou polyhydroxy-chlorosulfate d'aluminium. A usual process for clarifying the water entering the drinking water treatment stations, loaded with the pollutants mentioned, comprises the dosing of coagulants based on aluminum and iron salts, of the aluminum sulfate, iron sulfate type, iron chloride, polyhydroxychloride aluminum, or polyhydroxy-chlorosulfate aluminum.
Cette méthode présente de nombreux problèmes
- sensibilité excessive au pH de l'eau brute, la plage de pH dans laquelle la coagulation est efficace étant étroite,
- le dosage de coagulant doit être précis, car, en cas de sur-infradosage, ou si le pH se situe hors de la plage efficace, les cations Al+++ et Fie+++ restent libres,
- nécessité de doses élevées de coagulants, occasionnant des problèmes de coût, de stocks, d'entretien de filtres. This method has many problems
- excessive sensitivity to the pH of raw water, the pH range in which coagulation is effective being narrow,
- the coagulant dosage must be precise, because, in the event of over-dosing, or if the pH is outside the effective range, the cations Al +++ and Fie +++ remain free,
- need for high doses of coagulants, causing problems of cost, stocks, maintenance of filters.
Le demandeur a trouvé la solution aux problèmes rencontrés en utilisant comme coagulants des produits à chaîne moléculaire beaucoup plus longue, obtenus par synthétisation des coagulants classiques précités avec des polymères cationiques solubles dans l'eau, obtenus par polymérisation ou condensation, tels que des dérivés de monomères vinyliques. The applicant has found the solution to the problems encountered by using, as coagulants, products with a much longer molecular chain, obtained by synthesis of the above-mentioned conventional coagulants with cationic water-soluble polymers, obtained by polymerization or condensation, such as derivatives of vinyl monomers.
Les nouveaux coagulants, que l'on peut appeler coagulants mixtes, caractérisés par une chaîne organique-inorganique présentent, de plus, des avantages supplémentaires lorsqu'ils sont utilisés pour la clarification de l'eau
- les flocs formés lors de la décantation résistent mieux et sans rupture aux agitations et aux remous qui se produisent dans l'eau lors du pompage,
- la décantabilité est améliorée,
- la cinétique de coagulation est améliorée, la différence par rapport aux coagulants classiques augmentant à mesure que la température de l'eau diminue,
- les paramètres qualitatifs de l'eau, tels que couleur, turbidité, cations résiduels (par exemple Al ) sont améliorés.The new coagulants, which can be called mixed coagulants, characterized by an organic-inorganic chain also have additional advantages when they are used for clarifying water.
- the flocs formed during decantation resist better and without breaking the agitations and eddies which occur in water during pumping,
- decantability is improved,
- the coagulation kinetics are improved, the difference compared to conventional coagulants increasing as the water temperature decreases,
- the qualitative parameters of the water, such as color, turbidity, residual cations (for example Al) are improved.
Les nouveaux coagulants sont synthétisés selon une méthode nouvelle qui modifie les produits actuels pour élaborer les coagulants classiques à base de sels de fer et d'aluminium. Les coagulants connus à ce jour sont
- sulfate d'aluminium (SO4)3A12
- chlorure de fer C13Fe
- polyhydroxychlorosulfate d'Al
Clx (OH)y (SO4)z Aln
- sulfate de fer (S04)3 Fe2
lesquels s'associent, une fois produits ou en cours de production, à la structure desdits sels, chaînes organiques de polymères cationiques solubles dans l'eau, obtenus, à leur tour, par condensation ou polymérisation de radicaux de monomères vinyliques et, de préférence, d'un ou plusieurs monomères suivants (ou de leurs dérivés, sels ou composés quaternaires)
- diméthylaminoéthyle acrylate
- diméthylaminoéthyle métacrylate
- diéthylaminoéthyle acrylate
- diéthylaminoéthyle métacrylate
- diallyldiméthyle chlorure d'ammonium
- épichlorhydrine
- diméthylamine
en agitant la solution pendant 15 minutes au moins, mais, de préférence, pendant plus d'une heure, à une température supérieure à celle de la température ambiante, avant de la refroidir et de la filtrer.The new coagulants are synthesized according to a new method which modifies the current products to develop the classic coagulants based on iron and aluminum salts. The coagulants known to date are
- aluminum sulphate (SO4) 3A12
- iron chloride C13Fe
- Al polyhydroxychlorosulfate
Clx (OH) y (SO4) z Aln
- iron sulfate (S04) 3 Fe2
which are associated, once produced or during production, with the structure of said salts, organic chains of cationic polymers soluble in water, obtained, in their turn, by condensation or polymerization of radicals of vinyl monomers and, preferably , one or more of the following monomers (or their derivatives, salts or quaternary compounds)
- dimethylaminoethyl acrylate
- dimethylaminoethyl methacrylate
- diethylaminoethyl acrylate
- diethylaminoethyl methacrylate
- diallyldimethyl ammonium chloride
- epichlorohydrin
- dimethylamine
stirring the solution for at least 15 minutes, but preferably for more than an hour, at a temperature higher than that of room temperature, before cooling and filtering it.
Le traitement des eaux avec ces coagulants mixtes consiste à doser, après les étapes habituelles de pré-oxydation, ce type de coagulants mixtes, en remplacement des coagulants classiques employés, pour réaliser une microfloculation sur des filtres à sable, une filtration sous pression, une décantation, ou tout autre type de procédé physico-chimique employé dans le traitement de l'eau potable incluant l'utilisation de coagulants classiques comme ceux précités. Water treatment with these mixed coagulants consists in dosing, after the usual pre-oxidation stages, this type of mixed coagulants, replacing the conventional coagulants used, to carry out microflocculation on sand filters, pressure filtration, decantation, or any other type of physicochemical process used in the treatment of drinking water including the use of conventional coagulants like those mentioned above.
Dans les exemples mentionnés, on utilise certains des monomères sus-indiqués, mais l'utilisation de leurs sels, par exemple, de Na ou de dérivés quaternisés, entre également dans le cadre de l'invention. In the examples mentioned, some of the above-mentioned monomers are used, but the use of their salts, for example, of Na or of quaternized derivatives, also falls within the scope of the invention.
Exemple 1
"Après l'obtention selon les méthodes connues du polyhydroxychlorosulfate basique d'aluminium (concentration 10 %, comme l'A1203, basicité 50 % et teneur en sulfates 2 %), dans un réacteur doté d'une enveloppe de chauffage, on ajoute sous agitation à la masse de réaction à 55 OC une quantité de superfloc C 577 (polymère cationique formé par la condensation d'épychlorhydrine et de diméthylamine jusqu'à l'obtention d'un poids moléculaire de 75 000 g/mol, et se présentant dans le commerce sous forme d'une solution aqueuse à 50 %) telle que le polymère actif constitue 1 % du poids total du produit final. On maintient l'agitation pendant une heure à une température comprise entre 50 et 60 OC, on refroidit et on filtre pour obtenir un coagulant mixte".Example 1
"After obtaining, according to known methods, basic aluminum polyhydroxychlorosulfate (concentration 10%, like A1203, basicity 50% and sulphate content 2%), in a reactor provided with a heating jacket, stirring at the reaction mass at 55 ° C. an amount of superfloc C 577 (cationic polymer formed by the condensation of epychlorohydrin and dimethylamine until a molecular weight of 75,000 g / mol is obtained, and occurring in commercial in the form of a 50% aqueous solution) such that the active polymer constitutes 1% of the total weight of the final product. Stirring is continued for one hour at a temperature between 50 and 60 ° C., it is cooled and filter to obtain a mixed coagulant ".
Exemple 2
"Dans un réacteur d'une capacité de 1,5 litre, doté d'une enveloppe de chauffage, on introduit sous agitation 698 grammes d'eau déminéralisée, 147 grammes d'hydrate d'alumine à 63 % (comme 1'A1203) et 255 grammes d'acide sulfurique à 98 %. On ferme le réacteur et on porte le mélange à 140 OC, en agitant pendant deux heures. On baisse la température à 60 OC et on ajoute 22,0 grammes de superfloc C 577 (polymère cationique formé par condensation d'épychlorhydrine et de diméthylamine jusqu'à l'obtention d'un poids moléculaire de 75 000 g/mol et se présentant dans le commerce sous forme d'une solution aqueuse à 50 %). On maintient l'agitation pendant une heure à une température comprise entre 55 et 65 OC, on refroidit et on filtre pour obtenir un coagulant mixte".Example 2
"In a reactor with a capacity of 1.5 liters, fitted with a heating jacket, are introduced with stirring 698 grams of demineralized water, 147 grams of alumina hydrate at 63% (such as A1203) and 255 grams of 98% sulfuric acid. The reactor is closed and the mixture is brought to 140 OC, with stirring for two hours. The temperature is lowered to 60 OC and 22.0 grams of superfloc C 577 (polymer cationic formed by condensation of epychlorohydrin and dimethylamine until a molecular weight of 75,000 g / mol is obtained and which is commercially available in the form of a 50% aqueous solution. for one hour at a temperature between 55 and 65 ° C., it is cooled and filtered to obtain a mixed coagulant ".
Exemple 3
"Après l'obtention par les méthodes connues du polyhydroxychlorosulfate basique d'aluminium (concentration 10 %, comme l'A1203, basicité 50 % et teneur en sulfates 2 %), dans un réacteur doté d'une enveloppe de chauffage, on ajoute sous agitation à la masse de réaction à 48 OC une quantité de polymère cationique (formé par la polymérisation de radicaux de diallyldiméthylchlorure d'ammonium jusqu'à l'obtention d'un poids moléculaire de 200 000 g/mol et se présentant dans le commerce sous forme d'une solution aqueuse à 20 %), telle que ledit polymère actif représente 0,5 % du poids total du produit final. On maintient l'agitation pendant une heure à une température comprise entre 45 et 50 OC, on refroidit et on filtre pour obtenir un coagulant mixte".Example 3
"After obtaining, by known methods, basic aluminum polyhydroxychlorosulfate (concentration 10%, like A1203, basicity 50% and sulphate content 2%), in a reactor provided with a heating jacket, stirring at the reaction mass at 48 ° C. an amount of cationic polymer (formed by the polymerization of diallyldimethyl ammonium chloride radicals until a molecular weight of 200,000 g / mol is obtained and is commercially available under in the form of a 20% aqueous solution), such that said active polymer represents 0.5% of the total weight of the final product. Stirring is continued for one hour at a temperature between 45 and 50 ° C., it is cooled and filter to obtain a mixed coagulant ".
Exemple 4
"Dans un réacteur d'une capacité de 1,5 litre et doté d'une enveloppe de chauffage, on introduit sous agitation 698 grammes d'eau déminéralisée, 147 grammes d'hydrate d'alumine à 63 % (comme 1'A1203) et 255 grammes d'acide sulfurique à 98 %. On ferme le réacteur et on porte le mélange à 140 OC, en agitant pendant deux heures. On baisse la température à 60 OC et on ajoute 11,0 grammes d'un polymère cationique obtenu par polymérisation des radicaux de diallyldiméthylchlorure d' ammonium, jusqu'à l'obtention d'un poids moléculaire de 1 000 000 g/mol et se présentant dans le commerce sous forme de granulé solide. On maintient l'agitation pendant deux heures à une température comprise entre 55 et 65 OC, on refroidit et on filtre pour obtenir un coagulant mixte".Example 4
"In a reactor with a capacity of 1.5 liters and provided with a heating jacket, are introduced with stirring 698 grams of demineralized water, 147 grams of alumina hydrate at 63% (such as A1203) and 255 grams of 98% sulfuric acid. The reactor is closed and the mixture is brought to 140 OC, with stirring for two hours. The temperature is lowered to 60 OC and 11.0 grams of a cationic polymer obtained are added. by polymerization of the diallyldimethyl ammonium chloride radicals, until a molecular weight of 1,000,000 g / mol is obtained and which is commercially available in the form of a solid granule. Stirring is continued for two hours at a temperature between 55 and 65 ° C., it is cooled and filtered to obtain a mixed coagulant ".
Les matériaux, dimensions, proportions et, en général, tous les autres détails accessoires ou secondaires, pourront être modifiés, pour autant qu'ils n'altèrent, ne changent ou ne modifient pas l'essence de l'invention. The materials, dimensions, proportions and, in general, all the other accessory or secondary details, may be modified, provided that they do not alter, do not change or do not modify the essence of the invention.
Les termes dans lesquels la présente description a été rédigée sont exacts et constituent le reflet fidèle de l'objet décrit, lequel doit être pris dans son sens le plus large et non pas sous une forme limitative. The terms in which this description has been drafted are exact and constitute a faithful reflection of the object described, which must be taken in its broadest sense and not in a limiting form.
Claims (6)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9703373A GB2322128B (en) | 1997-02-18 | 1997-02-18 | Mixed coagulants |
| FR9702471A FR2760002B1 (en) | 1997-02-18 | 1997-02-25 | METHOD FOR MANUFACTURING MIXED COAGULANTS FOR CLARIFYING WATER, MIXED COAGULANTS OBTAINED BY THIS PROCESS AND METHOD FOR CLARIFYING WATER WITH SAID MIXED COAGULANTS |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9703373A GB2322128B (en) | 1997-02-18 | 1997-02-18 | Mixed coagulants |
| FR9702471A FR2760002B1 (en) | 1997-02-18 | 1997-02-25 | METHOD FOR MANUFACTURING MIXED COAGULANTS FOR CLARIFYING WATER, MIXED COAGULANTS OBTAINED BY THIS PROCESS AND METHOD FOR CLARIFYING WATER WITH SAID MIXED COAGULANTS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2760002A1 true FR2760002A1 (en) | 1998-08-28 |
| FR2760002B1 FR2760002B1 (en) | 1999-04-16 |
Family
ID=26233359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR9702471A Expired - Fee Related FR2760002B1 (en) | 1997-02-18 | 1997-02-25 | METHOD FOR MANUFACTURING MIXED COAGULANTS FOR CLARIFYING WATER, MIXED COAGULANTS OBTAINED BY THIS PROCESS AND METHOD FOR CLARIFYING WATER WITH SAID MIXED COAGULANTS |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2760002B1 (en) |
| GB (1) | GB2322128B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018042052A1 (en) * | 2016-09-05 | 2018-03-08 | Kemira Oyj | An aluminium sulphate polymer coagulant, a production method and uses thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3642619A (en) * | 1970-08-31 | 1972-02-15 | Calgon Corp | Conditioning sewage waste sludges for dewatering |
| US4800039A (en) * | 1987-03-05 | 1989-01-24 | Calgon Corporation | Flocculation of suspended solids from aqueous solutions |
| WO1994002424A1 (en) * | 1992-07-21 | 1994-02-03 | Kemira Oy | Process for purifying sludge containing mainly water |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3915904A (en) * | 1972-08-25 | 1975-10-28 | Betz Laboratories | Water-soluble cationic polymeric materials and their use |
| GB1512022A (en) * | 1976-08-05 | 1978-05-24 | Hemlab Ag | Flocculating agents for water treatment |
| DE3111615A1 (en) * | 1981-03-25 | 1982-10-07 | Basf Ag, 6700 Ludwigshafen | METHOD FOR REMOVING ANIONIC COMPOUNDS FROM WATER |
| SE446969B (en) * | 1983-12-09 | 1986-10-20 | Olof Carlsson | WAY TO MAKE A FLOCKING AGENT |
| US5294352A (en) * | 1985-06-27 | 1994-03-15 | Waldmann John J | Compositions for the detackification of paint spray booth water and waste water |
| TR23687A (en) * | 1986-11-06 | 1990-06-13 | Nalco Chemical Co | WATER DRILLING PROCESS AND YOENTEM |
| US6020422A (en) * | 1996-11-15 | 2000-02-01 | Betzdearborn Inc. | Aqueous dispersion polymers |
-
1997
- 1997-02-18 GB GB9703373A patent/GB2322128B/en not_active Expired - Fee Related
- 1997-02-25 FR FR9702471A patent/FR2760002B1/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3642619A (en) * | 1970-08-31 | 1972-02-15 | Calgon Corp | Conditioning sewage waste sludges for dewatering |
| US4800039A (en) * | 1987-03-05 | 1989-01-24 | Calgon Corporation | Flocculation of suspended solids from aqueous solutions |
| WO1994002424A1 (en) * | 1992-07-21 | 1994-02-03 | Kemira Oy | Process for purifying sludge containing mainly water |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2322128A (en) | 1998-08-19 |
| GB9703373D0 (en) | 1997-04-09 |
| GB2322128B (en) | 2001-08-15 |
| FR2760002B1 (en) | 1999-04-16 |
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| ST | Notification of lapse |
Effective date: 20131031 |