GB829605A - Method of regenerating a glass etching bath - Google Patents

Method of regenerating a glass etching bath

Info

Publication number
GB829605A
GB829605A GB4276/58A GB427658A GB829605A GB 829605 A GB829605 A GB 829605A GB 4276/58 A GB4276/58 A GB 4276/58A GB 427658 A GB427658 A GB 427658A GB 829605 A GB829605 A GB 829605A
Authority
GB
United Kingdom
Prior art keywords
etching
glass
acid
hydrofluoric acid
hydrofluosilicic
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
GB4276/58A
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.)
Corning Glass Works
Original Assignee
Corning Glass Works
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 Corning Glass Works filed Critical Corning Glass Works
Publication of GB829605A publication Critical patent/GB829605A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C15/00Surface treatment of glass, not in the form of fibres or filaments, by etching

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Surface Treatment Of Glass (AREA)

Abstract

829,605. Etching. CORNING GLASS WORKS. Feb. 10, 1958 [Feb. 18, 1957], No. 4276/58. Class 100(2) A method of controlling the etching of a solid-containing glass in a hydrafluoric acid solution comprises regenerating the etching solution by neutralizing at least a part of the hydrofluosilicic acid formed and adding sufficient hydrofluoric acid to restore the initial concentration of free hydrofluoric acid in the solution. The hydrofluosilicic acid is removed by filtration after precipitation by a soluble salt whose metal ion forms a soluble fluoride and insoluble siliconuoride. Potassium salts are preferred, and sulphates and nitrates are not suitable. Potassium fluoride may be used, but preferably anhydrous of hydrated potassium carbonate. The hydrofluosilicic acid should not all be removed, and for etching crystallite glass having an etching ratio of 35 to 1 in 10% hydrofluoric acid, should be maintained in a range of 2-5% SiO 2 . The etching apparatus may comprise means for adding metered amounts of the precipitating salt and hydrofluoric acid and, the amounts being controlled by a device sensitive to the concentrations of the respective acids, a pump, a filter, and two baths, one for use while the other is regenerated. The etching liquid is splashed upwardly by a rotary paddle against the glass, at a temperature of at least 25‹C. The glass may be a lithium; silicate glass. Specification 699,897 is referred to.
GB4276/58A 1957-02-18 1958-02-10 Method of regenerating a glass etching bath Expired GB829605A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US829605XA 1957-02-18 1957-02-18

Publications (1)

Publication Number Publication Date
GB829605A true GB829605A (en) 1960-03-02

Family

ID=22174545

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4276/58A Expired GB829605A (en) 1957-02-18 1958-02-10 Method of regenerating a glass etching bath

Country Status (1)

Country Link
GB (1) GB829605A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5281318A (en) * 1991-07-26 1994-01-25 Tomen Construction Co., Ltd. Process for processing a waste etching solution containing a fluorine component and an ammonia component to recover valuables therefrom
GB2323334A (en) * 1997-03-21 1998-09-23 Lg Electronics Inc Wet etching glass with recycle of etchant and end-point sensing by temperature
US6228211B1 (en) 1998-09-08 2001-05-08 Lg. Philips Lcd Co., Ltd. Apparatus for etching a glass substrate
US6281136B1 (en) 1996-06-26 2001-08-28 Lg.Philips Lcd Co., Ltd. Apparatus for etching glass substrate
US6327011B2 (en) 1997-10-20 2001-12-04 Lg Electronics, Inc. Liquid crystal display device having thin glass substrate on which protective layer formed and method of making the same
US6558776B1 (en) 1998-10-22 2003-05-06 Lg.Philips Lcd Co., Ltd. Glass substrate for liquid crystal display device
US6630052B1 (en) 1996-06-26 2003-10-07 Lg. Philips Lcd Co., Ltd. Apparatus for etching glass substrate
US9505651B2 (en) 2012-05-31 2016-11-29 Corning Incorporated Systems and methods for acid-treating glass articles
CN106904838A (en) * 2017-03-14 2017-06-30 凯盛科技股份有限公司 One kind etching acid solution recoverying and utilizing method
US9926225B2 (en) 2011-12-30 2018-03-27 Corning Incorporated Media and methods for etching glass

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5281318A (en) * 1991-07-26 1994-01-25 Tomen Construction Co., Ltd. Process for processing a waste etching solution containing a fluorine component and an ammonia component to recover valuables therefrom
US6630052B1 (en) 1996-06-26 2003-10-07 Lg. Philips Lcd Co., Ltd. Apparatus for etching glass substrate
US6281136B1 (en) 1996-06-26 2001-08-28 Lg.Philips Lcd Co., Ltd. Apparatus for etching glass substrate
US6461470B2 (en) 1996-06-26 2002-10-08 L.G. Philips Lcd Co., Ltd. Apparatus for etching glass substrate
GB2323334A (en) * 1997-03-21 1998-09-23 Lg Electronics Inc Wet etching glass with recycle of etchant and end-point sensing by temperature
GB2323334B (en) * 1997-03-21 1999-08-04 Lg Electronics Inc Etching apparatus
US8043466B1 (en) 1997-03-21 2011-10-25 Lg Display Co., Ltd Etching apparatus
US6955840B2 (en) 1997-10-20 2005-10-18 Lg. Philips Lcd Co., Ltd. Liquid crystal display device having thin glass substrate on which protective layer formed and method of making the same
US6327011B2 (en) 1997-10-20 2001-12-04 Lg Electronics, Inc. Liquid crystal display device having thin glass substrate on which protective layer formed and method of making the same
US6228211B1 (en) 1998-09-08 2001-05-08 Lg. Philips Lcd Co., Ltd. Apparatus for etching a glass substrate
US6558776B1 (en) 1998-10-22 2003-05-06 Lg.Philips Lcd Co., Ltd. Glass substrate for liquid crystal display device
US9926225B2 (en) 2011-12-30 2018-03-27 Corning Incorporated Media and methods for etching glass
US9505651B2 (en) 2012-05-31 2016-11-29 Corning Incorporated Systems and methods for acid-treating glass articles
CN106904838A (en) * 2017-03-14 2017-06-30 凯盛科技股份有限公司 One kind etching acid solution recoverying and utilizing method

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