GB379133A - Improvements relating to thorium dioxide sols - Google Patents

Improvements relating to thorium dioxide sols

Info

Publication number
GB379133A
GB379133A GB2868031A GB2868031A GB379133A GB 379133 A GB379133 A GB 379133A GB 2868031 A GB2868031 A GB 2868031A GB 2868031 A GB2868031 A GB 2868031A GB 379133 A GB379133 A GB 379133A
Authority
GB
United Kingdom
Prior art keywords
parts
amylose
per cent
thorium dioxide
sol
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
GB2868031A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2868031A priority Critical patent/GB379133A/en
Publication of GB379133A publication Critical patent/GB379133A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
    • B01J13/0004—Preparation of sols
    • B01J13/0034—Additives, e.g. in view of promoting stabilisation or peptisation

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Abstract

Thorium dioxide sols, which are positively charged, are rendered insensitive to change of reaction by the addition of a colloidal or semicolloidal carbohydrate, such as amylose or similar degradation products of starch. The stabilized sols may be rendered neutral or alkaline, and may be used for radiographic diagnosis, especially for the mere filling of hollow spaces and capillaries, such as the bladder and kidneys. According to examples: (1) Into 100 parts of a 12.5 per cent thorium dioxide sol there are introduced 10 parts of an amylose prepared by digesting 10 parts of rice starch with 2.5 parts of oxalic acid and 50 parts of water in an autoclave at 115-120 DEG C. for 4 hours. The homogeneous solution is dialysed and evaporated. (2) To prepare a sol of high concentration which is stable for all pH values, 20 parts of a strongly degraded amylose are added to 100 parts of a 25 per cent thorium dioxide sol. The amylose is prepared by treating 10 parts of wheat starch in 100 parts of water with 3 parts of a 3 per cent solution of diastase at 50 DEG C. until a thin liquid is produced.ALSO:Thorium dioxide sols which may be used for radiographic diagnosis are rendered insensitive to change of reaction by the addition of a colloidal or semicolloidal carbohydrate, such as amylose or similar degradation products of starch. The stabilized sols may be rendered neutral or alkaline and may be used especially for radiographic diagnosis which consists in the mere filling of hollow spaces and capillaries, such as the bladder and kidneys. According to examples (1) Into 100 parts of a 12,5 per cent thorium dioxide sol there are introduced 10 parts of an amylose prepared by digesting 10 parts of rice starch with 2,5 parts of oxalic acid and 50 parts of water in an autoclave at 115-120 DEG C. for four hours. The homogeneous solution is dialyzed and evaporated. (2) To prepare a sol of high concentration which is stable for all pH values, 20 parts of a strongly degraded amylose are added to 100 parts of a 25 per cent thorium dioxide sol. The amylose is prepared by treating 10 parts of wheat starch in 100 parts of water with 3 parts of a 3 per cent solution of diastase at 50 DEG C. until a thin liquid is produced.
GB2868031A 1931-10-15 1931-10-15 Improvements relating to thorium dioxide sols Expired GB379133A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2868031A GB379133A (en) 1931-10-15 1931-10-15 Improvements relating to thorium dioxide sols

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2868031A GB379133A (en) 1931-10-15 1931-10-15 Improvements relating to thorium dioxide sols

Publications (1)

Publication Number Publication Date
GB379133A true GB379133A (en) 1932-08-25

Family

ID=10279427

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2868031A Expired GB379133A (en) 1931-10-15 1931-10-15 Improvements relating to thorium dioxide sols

Country Status (1)

Country Link
GB (1) GB379133A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3097175A (en) * 1957-10-31 1963-07-09 Grace W R & Co Stable silica-clad thoria sols and their preparation
US3256204A (en) * 1963-02-13 1966-06-14 Diamond Alkali Co Metal oxide aquasols and their preparation by liquid-liquid ion exchange
US3317432A (en) * 1959-06-02 1967-05-02 Du Pont Thorium oxide sol

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3097175A (en) * 1957-10-31 1963-07-09 Grace W R & Co Stable silica-clad thoria sols and their preparation
US3317432A (en) * 1959-06-02 1967-05-02 Du Pont Thorium oxide sol
US3256204A (en) * 1963-02-13 1966-06-14 Diamond Alkali Co Metal oxide aquasols and their preparation by liquid-liquid ion exchange

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