GB952499A - Preparation of thorium oxalate - Google Patents

Preparation of thorium oxalate

Info

Publication number
GB952499A
GB952499A GB2933461A GB2933461A GB952499A GB 952499 A GB952499 A GB 952499A GB 2933461 A GB2933461 A GB 2933461A GB 2933461 A GB2933461 A GB 2933461A GB 952499 A GB952499 A GB 952499A
Authority
GB
United Kingdom
Prior art keywords
thorium
per
cation
gms
bulk density
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
GB2933461A
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.)
Dow Chemical Co
Original Assignee
Dow Chemical 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 Dow Chemical Co filed Critical Dow Chemical Co
Publication of GB952499A publication Critical patent/GB952499A/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/41Preparation of salts of carboxylic acids
    • C07C51/412Preparation of salts of carboxylic acids by conversion of the acids, their salts, esters or anhydrides with the same carboxylic acid part

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Thorium oxide of high packed bulk density is made by calcining thorium oxalate in either the dihydrate or hexahydrate form, which is prepared by the process of the invention (see Division C2), and which has a packed bulk density of at least 1.0 gms. per c.c. The preferred temperature for calcining the dihydrate is 600 DEG C. In an example the oxide produced has a packed bulk density of 3.2 gms. per c.c. and, in a series of experiments expressed in tabular form, the oxides obtained have packed bulk densities varying from 2.0 to 3.3 gms. per c.c.ALSO:Thorium oxalate, of relatively high bulk density, is made by feeding an aqueous solution of a thorium salt, with a pH of below 4, into an oxalic acid solution to form a reaction mixture which is maintained at 40 DEG C. and upwards and adding thereto, whilst thorium oxalate is precipitated, a monovalent cation in an amount directly proportional to that of the thorium within the range of 0.5 to 15 moles of cation per mole of thorium added to the acid solution. A dense thorium oxalate has a packed bulk density of at least 1.0 gms. per c.c. Preferably the thorium solution contains at least 0.05% by weight of thorium as Th+4 and not more than 2-5 moles of cation per litre of aqueous solution and 4 to 6.5 moles of cation per mole of thorium are present. Preferably solutions containing about 10% by weight of oxalic acid are used. The cation may be added as a constituent of the aqueous thorium solution. If the hydrogen ion concentration of the thorium solution is above 10N it is partially neutralized e.g. with sodium hydroxide. Sodium, potassium, lithium and ammonium cations, and mixtures thereof, are specified. Thorium sulphate, chloride and nitrate are specified thorium salts. If the cation is added as an oxalate the cation containing, and thorium containing, solutions should be added simultaneously at a rate such that the cation to thorium ratio remains substantially constant within the above range. In an example an aqueous solution of thorium and sodium sulphate is added, at 80 DEG C., with agitation, to an oxalic acid solution, the thorium hexahydrate being filtered off and dried to form the dihydrate with a packed bulk density of 1.37 gms. per c.c. The oxalate may be calcinied to the oxide with a packed bulk density of 3.2 gms. per c.c. (see Division C1). Other salts used are sodium chloride and nitrate, ammonium chloride and sulphate, and potassium and lithium sulphate. The results of a number of experiments illustrating various changes in the reaction conditions, and salts used, are shown in tabular form, the packed bulk derivatives of the oxalates obtained varying from 1.0 to 1.37 gms. per c.c.
GB2933461A 1960-08-15 1961-08-14 Preparation of thorium oxalate Expired GB952499A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US4941760A 1960-08-15 1960-08-15

Publications (1)

Publication Number Publication Date
GB952499A true GB952499A (en) 1964-03-18

Family

ID=21959719

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2933461A Expired GB952499A (en) 1960-08-15 1961-08-14 Preparation of thorium oxalate

Country Status (1)

Country Link
GB (1) GB952499A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0254935A1 (en) * 1986-07-12 1988-02-03 Mitsubishi Petrochemical Co., Ltd. Process for producing silver oxalate

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0254935A1 (en) * 1986-07-12 1988-02-03 Mitsubishi Petrochemical Co., Ltd. Process for producing silver oxalate

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