GB786308A - Anhydrous crystalline borate and process for producing same - Google Patents

Anhydrous crystalline borate and process for producing same

Info

Publication number
GB786308A
GB786308A GB2500555A GB2500555A GB786308A GB 786308 A GB786308 A GB 786308A GB 2500555 A GB2500555 A GB 2500555A GB 2500555 A GB2500555 A GB 2500555A GB 786308 A GB786308 A GB 786308A
Authority
GB
United Kingdom
Prior art keywords
borate
sodium
boric acid
water
calcined
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
GB2500555A
Inventor
Nelson Perry Nies
Donald Stinson Taylor
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.)
Borax Europe Ltd
Original Assignee
Borax Consolidated Ltd
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 Borax Consolidated Ltd filed Critical Borax Consolidated Ltd
Priority to GB2500555A priority Critical patent/GB786308A/en
Publication of GB786308A publication Critical patent/GB786308A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B35/00—Boron; Compounds thereof
    • C01B35/08—Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
    • C01B35/10—Compounds containing boron and oxygen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B35/00—Boron; Compounds thereof
    • C01B35/06—Boron halogen compounds
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B35/00—Boron; Compounds thereof
    • C01B35/08—Compounds containing boron and nitrogen, phosphorus, oxygen, sulfur, selenium or tellurium
    • C01B35/10—Compounds containing boron and oxygen
    • C01B35/12—Borates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Cosmetics (AREA)

Abstract

An anhydrous, crystalline sodium borate composition (B2O3:Na2O equals 3.7 to below 4 : 1) and comprising mainly sodum 1.4 borate (Na20.4B2O3) is prepared by moving a feed composition (preferably continuously) of B2O3, Na2O and H2O with a B2O3/Na2O molar ratio of 3.7 to below 4 through a heating zone to produce a fused anhydrous melt and cooling. The mixture which preferably contains not more than 30 per cent by weight of water is preferably calcined before moving through the heating zone to remove the water of hydration. The cooling should cause complete solidification during a cooling time of an hour and the melt is removed from the heating zone in a form that the volume/surface ratio allows this cooling time. Suitable feed materials described are (a) sodium borate (B2O3/Na2O ratio less than 4) with boric acid or sodium 1.5 borate; (b) granular calcined borax containing not more than 2 mols. of water and granular boric acid; (c) crystalline sodium 1,2-borate pentahydrate and crystalline boric acid; (d) calcined sodium 1.5 borate and calcined 1.2 borate in a 1.3 to 1.9 to 1 ratio, with a water content of less than 30 per cent by weight; (e) the 1.5 borate may be produced in situ. Sodium 1.5 borate is produced by (a) reacting sodium 1.2 borate with boric acid in a current of hot air; (b) tumbling granular borax and boric acid in molar proportions 1:6 in a calciner in a stream of air at 85-100 DEG F.; increasing the temperature to evaporate water as fast as it is released and when reaction is complete evaporating to produce dry 1.5 borate; (c) dissolving boric acid and sodium 1.2 borate (e.g. calcined borax) in water and crystallizing 1.5 borate.
GB2500555A 1955-08-31 1955-08-31 Anhydrous crystalline borate and process for producing same Expired GB786308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2500555A GB786308A (en) 1955-08-31 1955-08-31 Anhydrous crystalline borate and process for producing same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2500555A GB786308A (en) 1955-08-31 1955-08-31 Anhydrous crystalline borate and process for producing same

Publications (1)

Publication Number Publication Date
GB786308A true GB786308A (en) 1957-11-13

Family

ID=10220684

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2500555A Expired GB786308A (en) 1955-08-31 1955-08-31 Anhydrous crystalline borate and process for producing same

Country Status (1)

Country Link
GB (1) GB786308A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115432711A (en) * 2022-10-21 2022-12-06 河北昊德生物科技有限公司 Production and synthesis process of sodium octaborate tetrahydrate

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115432711A (en) * 2022-10-21 2022-12-06 河北昊德生物科技有限公司 Production and synthesis process of sodium octaborate tetrahydrate
CN115432711B (en) * 2022-10-21 2023-12-01 河北昊德硼业有限公司 Sodium octaborate tetrahydrate production and synthesis process

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