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EP0145686A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A flocculating agent and a process for its production

Assignee: Individual
•
Filing: 1984-11-12
•
Granted: —
•
Expires: 2004-11-12
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Abstract

Abstract A flocculating agent for use in water purification technology and papermaking technology is described, as well as a process of producing the flocculating agent which is the reaction product of sulphate ion-containing polymeric aluminium hydroxy chloride and one or more cationic polymers preferably selected among polyacrylic amide, polyamide amine and polyethylene imine. The most preferred cationic polymer is polyacrylic amide. The flocculating agent is produced by mixing an aqueous suspension of sulphate ion-containing aluminium polyhydroxy chloride having a solids content of 20-30 parts by weight with 0.3-60 parts by weight of cationic polymer, based upon 100 parts by weight of sulphate ion-containing aluminium polyhydroxy chloride, and by heating the mixture for 2-4 h at a temperature varying from about 80° C to the boiling of the mixture.

Inventors

  • 👤 Olof Carlsson

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-23 04:44
CPC Classifications
D; D21; D21H; D21H17/00; D21H17/63; D21H17/66; C; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C02F1/5245; C02F1/54

Claims Analysis

Total Claims: 8
Claim 1
Independent Claim 72 words
A process of producing a flocculating agent, characterised in that an aqueous suspension of sulphate ion-containing aluminium polyhydroxy chloride having a solids content of 20-30% by weight is mixed with 0.3-60 parts by weight of cationic polymer, based upon 100 parts by weight of sulphate ion-containing aluminium polyhydroxy chloride, and that the mixture is heated for 2-4 h at a temperature varying from about 80°C to the boiling point of the mixture.
Claim 2
Dependent Claim 72 words
A process of producing a flocculating agent, characterised in that an aqueous suspension of sulphate ion-containing aluminium polyhydroxy chloride having a solids content of 20-30% by weight is mixed with 0.3-60 parts by weight of cationic polymer, based upon 100 parts by weight of sulphate ion-containing aluminium polyhydroxy chloride, and that the mixture is heated for 2-4 h at a temperature varying from about 80°C to the boiling point of the mixture.
Claim 3
Dependent Claim 26 words
A process as claimed in claim 1,characterised in that the cationic polymer is selected among at least one of polyacrylic amide, polyamide amine and polyethylene imine.
Claim 4
Dependent Claim 42 words
A process as claimed in claim 1, characterised in that the cationic polymer consists of polyacrylic amide which is added in an amount of up to 8 parts by weight, based upon 100 parts by weight of sulphate ion-containing aluminium polyhydroxy chloride.
Claim 5
Dependent Claim 40 words
A process as claimed in claim 1, characterised in that the cationic polymer consists of polyamide amine which is added in an amount of 4-60 parts by weight, based upon 100 parts by weight of sulphate ion-containing aluminium polyhydroxy chloride.
Claim 6
Dependent Claim 19 words
A process as claimed in claim 1, characterised in that the mixture is heated at a temperature of 96-98°C.
Claim 7
Dependent Claim 17 words
A process as claimed in claim 1, characterised in that the mixture is heated for 3-4 h.
Claim 8
Dependent Claim 18 words
A flocculating agent, characterised in that it has been produced by the process as claimed in claim 1.

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