GB651307A - Method of diminishing the formation of foam and preparations therefor - Google Patents

Method of diminishing the formation of foam and preparations therefor

Info

Publication number
GB651307A
GB651307A GB14473/48A GB1447348A GB651307A GB 651307 A GB651307 A GB 651307A GB 14473/48 A GB14473/48 A GB 14473/48A GB 1447348 A GB1447348 A GB 1447348A GB 651307 A GB651307 A GB 651307A
Authority
GB
United Kingdom
Prior art keywords
tri
butyl
ethyl
isoamyl
chloride
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
GB14473/48A
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.)
BASF Schweiz AG
Original Assignee
Ciba AG
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 CH651307X external-priority
Application filed by Ciba AG filed Critical Ciba AG
Publication of GB651307A publication Critical patent/GB651307A/en
Expired legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D19/00Degasification of liquids
    • B01D19/02Foam dispersion or prevention
    • B01D19/04Foam dispersion or prevention by addition of chemical substances
    • B01D19/0404Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance
    • B01D19/0409Foam dispersion or prevention by addition of chemical substances characterised by the nature of the chemical substance compounds containing Si-atoms

Abstract

Tri-n-butyl silicone is prepared by reacting n-butyl chloride with silicon chloroform in ether in the presence of sodium. Sodium chloride is removed by filtration, ether is removed, and the residue distilled. Similarly by substituting isoamyl chloride for n-butyl chloride tri-isoamyl silicane is obtained.ALSO:Tri and tetra-alkyl silicanes wherein the alkyl groups contain at least 2 carbon atoms are mixed with a solvent or another substance capable of lessening foam formation and added to liquids to diminish foam formation therein. In general, 0.01 to 0.5 per cent of the silicane suffices but the composition of the mixture itself can vary considerably. Specified silicanes are: tri-ethyl-; tri-(n-propyl)-; tri-isopropyl-; tri-(n-butyl)-; tri-isobutyl-; tri-isoamyl-; tri-(n-hexyl)-; tri-(2-ethyl butyl-1)-; tri-(n-octyl)-; tri-(2-ethyl-hexyl-1)-; tri-dodecyl-; tetra-ethyl-; and the tetra-isopropyl-; n-butyl-; isoamyl- and those containing a larger number of carbon atoms. Solvents soluble in water specified are isopropyl alcohol and polyhydric alcohols or their ethers, e.g. ethylene glycol; glycerine, diethylene glycol, ethylene glycol monoether and thiodiglycol; also ketones, e.g. acetone, whilst solvents sparingly soluble in water are aliphatic alcohols containing at least 5 carbon atoms especially branched chain ones, e.g. 2-ethyl-butanal, 2-ethyl-hexanal and also higher molecular weight alcohols, e.g. oleyl alcohol. Also phenols, e.g amyl phenols. Such sparingly water soluble solvents aid in diminishing foam formation as also do phosphoric acid esters, e.g. tri-(n-butyl) or tri-isobutyl-phosphate.
GB14473/48A 1947-06-10 1948-05-28 Method of diminishing the formation of foam and preparations therefor Expired GB651307A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH651307X 1947-06-10

Publications (1)

Publication Number Publication Date
GB651307A true GB651307A (en) 1951-03-14

Family

ID=4526133

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14473/48A Expired GB651307A (en) 1947-06-10 1948-05-28 Method of diminishing the formation of foam and preparations therefor

Country Status (4)

Country Link
CH (1) CH257713A (en)
DE (1) DE871287C (en)
FR (2) FR966051A (en)
GB (1) GB651307A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777807A (en) * 1952-11-22 1957-01-15 Du Pont Process of suppressing foam formation in distillation of acrylonitrile

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012117004A2 (en) * 2011-03-01 2012-09-07 Basf Se Medium chain alkanols in additive concentrates for improving the reduction of foam in fuel oils

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2777807A (en) * 1952-11-22 1957-01-15 Du Pont Process of suppressing foam formation in distillation of acrylonitrile

Also Published As

Publication number Publication date
DE871287C (en) 1953-03-23
CH257713A (en) 1948-10-31
FR466051A (en)
FR966051A (en) 1950-09-29

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