GB812228A - Clarification of aqueous organic suspensions - Google Patents

Clarification of aqueous organic suspensions

Info

Publication number
GB812228A
GB812228A GB6938/57A GB693857A GB812228A GB 812228 A GB812228 A GB 812228A GB 6938/57 A GB6938/57 A GB 6938/57A GB 693857 A GB693857 A GB 693857A GB 812228 A GB812228 A GB 812228A
Authority
GB
United Kingdom
Prior art keywords
sulphonic acid
aqueous
derived
finely divided
vinyl
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
Application number
GB6938/57A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dow Chemical Co
Original Assignee
Dow Chemical Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US569246A external-priority patent/US3009873A/en
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Publication of GB812228A publication Critical patent/GB812228A/en
Expired legal-status Critical Current

Links

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
    • C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material

Abstract

Aqueous suspensions of finely divided organic solids are clarified by incorporating in the suspension at least 0,01 pound (per short ton of suspended solids) of a water-soluble sulphonate (i.e. a sulphonic acid or salt thereof) derived from a high molecular weight poly (vinyl-aromatic) compound of the benzene series to increase the rate of sedimentation of the suspended solids. The aqueous suspension may be a waste water which must be clarified before discarding or reuse, and may be derived from a cannery, a sugar refinery or coal-washing plant. The sulphonates may be derived from polymers of stryrene, alpha-methyl styrene, vinyl toluene or vinyl xylene, or from linear copolymers of such materials with one another or with acrylic monomers (i.e. acrylonitrile, methacrylonitrile or the lower alkyl-esters of acrylic or methacrylic acid. Ammonium, lithium sodium, potassium and calcium salts of the sulphonic acids are mentioned. The sulphonates may be added to the aqueous suspensions in the form of aqueous solutions or they may be introduced as a finely divided solid in admixture with a finely divided inert solid. Before the sulphonate treatment, lime (in the form of finely divided calcium hydroxide or oxide, milk of lime or calcium hydroxide solution) may be added to the aqueous suspension. In the examples, (a) an aqueous slurry of coal fines from a coal crushing and cleaning milk, or a limed aqueous waste slurry of pea soup solids from a soup cannery, is treated with the sodium salt of the sulphonic acid derived from polyvinyltoluene or vinyl-toluene/acrylonitrile copolymer, (b) the aqueous slurry of coal fines is treated with free polyvinyltoluene sulphonic acid and (c) waste water from a beet sugar refinery is limed and treated with the sodium salt of polyvinyltoluene sulphonic acid or the potassium salt of polystyrene sulphonic acid. Specification 746,616 [Group IV(a)] is referred to.ALSO:Aqueous suspensions of finely divided solids are clarified by incorporating in the suspension at least 0.01 pound (per short ton of suspended solids) of a water-soluble sulphonate (i.e. a sulphonic acid or a salt thereof) derived from a high molecular weight poly-(vinyl-aromatic) compound of the benzene series to increase the rate of sedimentation of the suspended solids. In an example, first carbonation juice from a beet sugar refinery is treated with the sodium salt of polyvinyltoluene sulphonic acid. Specification 746,616, [Group IV (a)], is referred to.
GB6938/57A 1956-03-05 1957-03-01 Clarification of aqueous organic suspensions Expired GB812228A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US1173235XA 1956-03-05 1956-03-05
US812228XA 1956-03-05 1956-03-05
US569246A US3009873A (en) 1956-03-05 1956-03-05 Clarification of aqueous organic suspensions

Publications (1)

Publication Number Publication Date
GB812228A true GB812228A (en) 1959-04-22

Family

ID=27373933

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6938/57A Expired GB812228A (en) 1956-03-05 1957-03-01 Clarification of aqueous organic suspensions

Country Status (2)

Country Link
FR (1) FR1173235A (en)
GB (1) GB812228A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4849128A (en) * 1981-03-24 1989-07-18 Blue Circle Industries Limited Process and composition for conditioning an aqueous system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4849128A (en) * 1981-03-24 1989-07-18 Blue Circle Industries Limited Process and composition for conditioning an aqueous system

Also Published As

Publication number Publication date
FR1173235A (en) 1959-02-23

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