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GB741742A - Improvements in or relating to preparation of starch ethers and the products resulting therefrom - Google Patents

Improvements in or relating to preparation of starch ethers and the products resulting therefrom

Info

Publication number
GB741742A
GB741742A GB6964/53A GB696453A GB741742A GB 741742 A GB741742 A GB 741742A GB 6964/53 A GB6964/53 A GB 6964/53A GB 696453 A GB696453 A GB 696453A GB 741742 A GB741742 A GB 741742A
Authority
GB
United Kingdom
Prior art keywords
starch
per cent
oxide
catalyst
treated
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
GB6964/53A
Inventor
Ralph Waldo Kerr
Kenneth Clark Hobbs
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.)
Corn Products Refining Co
Original Assignee
Corn Products Refining 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
Application filed by Corn Products Refining Co filed Critical Corn Products Refining Co
Priority to GB6964/53A priority Critical patent/GB741742A/en
Publication of GB741742A publication Critical patent/GB741742A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/02—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring
    • C08G65/26—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds
    • C08G65/2696—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from cyclic ethers by opening of the heterocyclic ring from cyclic ethers and other compounds characterised by the process or apparatus used
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08B—POLYSACCHARIDES; DERIVATIVES THEREOF
    • C08B31/00—Preparation of derivatives of starch
    • C08B31/08—Ethers
    • C08B31/12—Ethers having alkyl or cycloalkyl radicals substituted by heteroatoms, e.g. hydroxyalkyl or carboxyalkyl starch

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Materials Engineering (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)

Abstract

Starch ethers are made by treating starch with an alkylene oxide in the presence of 0.025 to 0.10 mol. of an alkaline etherification catalyst per anhydroglucose unit (C6H10O5) of starch and under conditions such that the starch is not gelatinized. The starch may be treated in the form of dry granules or as an aqueous slurry or solution. Dry granules are preferably treated at about 20 to about 55 DEG C. with a catalyst range of 0.04 to 0.10 mol. per anhydroglucose unit. Aqueous slurries are preferably treated at about 40 DEG to 50 DEG C. with 0.025 to 0.075 mols. of catalyst per anhydroglucose unit. Desirably about 6 per cent by weight of a salt is added to the slurry which will react with the alkylene oxide in the presence of water to yield additional alkaline catalyst. Thus when sodium hydroxide is used as catalyst sodium chloride or sulphate may be added and when calcium oxide is used calcium salts such as the chloride may be added. The slurry usually contains 40 to 45 per cent by weight of starch. Esterification is usually effected so as to introduce 0.02-0.20 ether groups per glucose unit. Acid modified starches may be treated after a preliminary neutralization step. The products are isolated at pH's of about 5.5 to about 8.5. The products may be used in the paper and textile industries and may be after-treated, e.g. dextrinized. In examples (1) commercially dry corn starch is heated with ethylene oxide at about 35 DEG C. in the presence of 2 per cent of sodium hydroxide and the pH of the product adjusted to 7.6; (2) dried tapioca starch is heated at 40 DEG C. with propylene oxide in the presence of 3 per cent of calcium oxide and the pH of the product adjusted to 6.8; (3) an aqueous slurry containing 45 per cent of corn starch is heated with ethylene oxide at about 43 DEG C. in the presence of sodium hydroxide and chloride the product being isolated at pH 6.7; and in (4) an aqueous slurry containing 48 per cent of an acid-modified corn starch is heated at 45 DEG C. with calcium oxide and propylene oxide the product being isolated at pH 6.0.
GB6964/53A 1953-03-13 1953-03-13 Improvements in or relating to preparation of starch ethers and the products resulting therefrom Expired GB741742A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB6964/53A GB741742A (en) 1953-03-13 1953-03-13 Improvements in or relating to preparation of starch ethers and the products resulting therefrom

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6964/53A GB741742A (en) 1953-03-13 1953-03-13 Improvements in or relating to preparation of starch ethers and the products resulting therefrom

Publications (1)

Publication Number Publication Date
GB741742A true GB741742A (en) 1955-12-14

Family

ID=9824057

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6964/53A Expired GB741742A (en) 1953-03-13 1953-03-13 Improvements in or relating to preparation of starch ethers and the products resulting therefrom

Country Status (1)

Country Link
GB (1) GB741742A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900268A (en) * 1956-11-15 1959-08-18 John C Rankin Process for preparing hydroxyalkylated cereal flour
US2999090A (en) * 1957-05-10 1961-09-05 Corn Products Co Preparation of oxidized hydroxyalkyl starch
US3031319A (en) * 1958-11-18 1962-04-24 Earl B Lancaster Preparation of hydroxyethylated flours
US4826619A (en) * 1987-12-03 1989-05-02 A. E. Staley Manufacturing Company Starch slurries with concentrated aqueous alkaline solutions
US9068022B1 (en) * 2008-05-06 2015-06-30 General Mills, Inc. Process for making a modified starch product

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2900268A (en) * 1956-11-15 1959-08-18 John C Rankin Process for preparing hydroxyalkylated cereal flour
US2999090A (en) * 1957-05-10 1961-09-05 Corn Products Co Preparation of oxidized hydroxyalkyl starch
US3031319A (en) * 1958-11-18 1962-04-24 Earl B Lancaster Preparation of hydroxyethylated flours
US4826619A (en) * 1987-12-03 1989-05-02 A. E. Staley Manufacturing Company Starch slurries with concentrated aqueous alkaline solutions
US9068022B1 (en) * 2008-05-06 2015-06-30 General Mills, Inc. Process for making a modified starch product
US9605087B1 (en) 2008-05-06 2017-03-28 General Mills, Inc. Process for making a modified starch product

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