GB891770A - Iron carboxymethyl dextran - Google Patents

Iron carboxymethyl dextran

Info

Publication number
GB891770A
GB891770A GB3125758A GB3125758A GB891770A GB 891770 A GB891770 A GB 891770A GB 3125758 A GB3125758 A GB 3125758A GB 3125758 A GB3125758 A GB 3125758A GB 891770 A GB891770 A GB 891770A
Authority
GB
United Kingdom
Prior art keywords
dextran
carboxymethyl
aqueous
iron
average
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
GB3125758A
Inventor
Carl Berger
Leo J Novak
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.)
Commonwealth Engineering Company of Ohio
Original Assignee
Commonwealth Engineering Company of Ohio
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
Application filed by Commonwealth Engineering Company of Ohio filed Critical Commonwealth Engineering Company of Ohio
Priority to GB3125758A priority Critical patent/GB891770A/en
Publication of GB891770A publication Critical patent/GB891770A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B37/00—Preparation of polysaccharides not provided for in groups C08B1/00 - C08B35/00; Derivatives thereof
    • C08B37/0006—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid
    • C08B37/0009—Homoglycans, i.e. polysaccharides having a main chain consisting of one single sugar, e.g. colominic acid alpha-D-Glucans, e.g. polydextrose, alternan, glycogen; (alpha-1,4)(alpha-1,6)-D-Glucans; (alpha-1,3)(alpha-1,4)-D-Glucans, e.g. isolichenan or nigeran; (alpha-1,4)-D-Glucans; (alpha-1,3)-D-Glucans, e.g. pseudonigeran; Derivatives thereof
    • C08B37/0021—Dextran, i.e. (alpha-1,4)-D-glucan; Derivatives thereof, e.g. Sephadex, i.e. crosslinked dextran

Abstract

The invention comprises ferrous and ferric complexes of carboxymethyldextran, containing an average of about 1,0 to 3,0 carboxymethyl groups per anhydroglucose unit, which are insoluble in aqueous acid solution of pH 1,6 to 1,8 but readily soluble in aqueous alkaline solution at pH 8,0 to 8,5. The complexes may be obtained by slowly adding an aqueous jelly-like dispersion of a carboxymethyl ether of a water-dispersible dextran having a molecular weight between 2000 and that of native, microbiologically produced dextran containing an average of 1,0 to 3,0 carboxymethyl groups per anhydroglucose unit, to an aqueous solution of ferric chloride or ferrous chloride or such concentration that the relative proportions by weight of the carboxymethyl dextran to the iron chloride are from 1:5 to 1:10, with stirring, allowing the reaction mass to stand at room temperature until the iron carboxymethyl dextran complex is formed and precipitated, and separating the complex from the reaction mass. The carboxymethyl dextran may be made by treating dextran, e.g. native dextran or hydrolysed dextrans having a molecular weight between 2000 and that of native dextran, with an excess of sodium or potassium chloracetate in solution or suspension in aqueous sodium or potassium hydroxide at 50 DEG to 100 DEG C. for one half hour to two hours, precipitating the salt of carboxymethyldextran with a water miscible alcohol or ketone, and obtaining the free acid by mixing the salt with water, acidifying to pH 3 and precipitating with the alcohol or ketone. Specification 891,769 is referred to.ALSO:A ferrous carboxymethyl dextran complex in which the carboxymethyl dextran contains an average of about 1,0 to 3,0 carboxymethyl groups per anhydroglucose unit, (for preparation see Group IV(a)) may be used as a soil conditioning agent, assisting in binding the soil particles into readily workable small aggregates and liberating iron to the soil at a controlled rate. Specification 891,769 is referred to.
GB3125758A 1958-09-30 1958-09-30 Iron carboxymethyl dextran Expired GB891770A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3125758A GB891770A (en) 1958-09-30 1958-09-30 Iron carboxymethyl dextran

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3125758A GB891770A (en) 1958-09-30 1958-09-30 Iron carboxymethyl dextran

Publications (1)

Publication Number Publication Date
GB891770A true GB891770A (en) 1962-03-21

Family

ID=10320386

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3125758A Expired GB891770A (en) 1958-09-30 1958-09-30 Iron carboxymethyl dextran

Country Status (1)

Country Link
GB (1) GB891770A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1668033A1 (en) * 1966-10-22 1971-05-13 Fisons Pharmaceuticals Ltd New ferric hydroxide-carbohydrate complexes and processes for their production
EP0450092A1 (en) * 1989-10-20 1991-10-09 Meito Sangyo Kabushiki Kaisha Organic magnetic composite

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1668033A1 (en) * 1966-10-22 1971-05-13 Fisons Pharmaceuticals Ltd New ferric hydroxide-carbohydrate complexes and processes for their production
EP0450092A1 (en) * 1989-10-20 1991-10-09 Meito Sangyo Kabushiki Kaisha Organic magnetic composite
EP0450092A4 (en) * 1989-10-20 1992-12-09 Meito Sangyo Kabushiki Kaisha Organic magnetic composite

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