GB891770A - Iron carboxymethyl dextran - Google Patents
Iron carboxymethyl dextranInfo
- 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
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
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Molecular Biology (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
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.
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)
| 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 |
-
1958
- 1958-09-30 GB GB3125758A patent/GB891770A/en not_active Expired
Cited By (3)
| 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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