EP4013723A1 - Procédé de traitement d'un verre comprenant du plomb permettant de limiter la migration en solution du plomb contenu dans ce verre - Google Patents
Procédé de traitement d'un verre comprenant du plomb permettant de limiter la migration en solution du plomb contenu dans ce verreInfo
- Publication number
- EP4013723A1 EP4013723A1 EP20820264.8A EP20820264A EP4013723A1 EP 4013723 A1 EP4013723 A1 EP 4013723A1 EP 20820264 A EP20820264 A EP 20820264A EP 4013723 A1 EP4013723 A1 EP 4013723A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- glass
- lead
- solution
- contact
- treatment
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C15/00—Surface treatment of glass, not in the form of fibres or filaments, by etching
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C12/00—Powdered glass; Bead compositions
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
- C03C23/007—Other surface treatment of glass not in the form of fibres or filaments by thermal treatment
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B25/00—Annealing glass products
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
- C03C23/008—Other surface treatment of glass not in the form of fibres or filaments comprising a lixiviation step
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C23/00—Other surface treatment of glass not in the form of fibres or filaments
- C03C23/0095—Solution impregnating; Solution doping; Molecular stuffing, e.g. of porous glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL 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
- C03C4/00—Compositions for glass with special properties
- C03C4/0028—Compositions for glass with special properties for crystal glass, e.g. lead-free crystal glass
Definitions
- the present invention relates to a process for treating a glass comprising lead making it possible to limit the migration of the lead contained in this glass, in particular, when the glass is in contact with an aqueous medium.
- the invention finds application in particular for the treatment of a glass of the crystal type, in particular, a glass comprising at least 24% by weight of lead oxide or even at least 30% by weight of lead oxide.
- the surface treatments of a glass comprising lead to reduce the release of the latter are particularly important when the objects based on such a glass may be intended to be in contact with the mouth (such as jewelry, tableware) so as to prevent the ingestion of lead by the human body.
- lead is a toxic metal for the body which, ingested in certain doses, can cause harmful effects for the central nervous system, the blood system or even the digestive system. This is the reason why many works have been carried out to set up a surface treatment of these objects, so as to limit the phenomenon of lead release.
- a method for treating the surface of glass articles, in particular crystal which comprises an operation of bringing the glass article, which is to be treated, into contact with a reactive gas resulting from the vaporization of a powder of ammonium aluminum sulphate (s) at a temperature not exceeding the softening temperature of the glass article, for example, a temperature of 490 ° C followed , after cooling the article, a washing operation of the article thus treated to remove any pulverulent residue.
- s ammonium aluminum sulphate
- the inventors have set themselves the objective of developing a process for treating a glass comprising lead which does not have the aforementioned drawbacks and which makes it possible to obtain, in particular, a substantial reduction in water content.
- lead release rate of the latter when this glass is brought into contact with an aqueous medium and, in particular, during the deterioration of the latter, this process also having to be in phase with the evolution of toxicological data on the ingestion of lead in the body (with an expected sharp reduction in detection limits) and the possible tightening of European REACh and food contact regulations, which could severely restrict the admissible levels of lead in solution.
- the invention relates to a method for treating a glass comprising lead making it possible, in particular, to limit the migration of the lead contained in this glass, said method comprising successively the following distinct steps:
- a step of heat treatment of the glass at a temperature less than or equal to the glass transition temperature of the glass.
- the method of the invention comprises a step of bringing the glass comprising lead into contact with a solution comprising perchloric acid.
- Perchloric acid is understood to mean that it is the acid corresponding to the formula HCIO4.
- the solution comprising perchloric acid is an aqueous solution of perchloric acid and, more precisely, a solution comprising, besides water, exclusively perchloric acid.
- Perchloric acid can be present in the solution at a concentration ranging from 10 3 M to 10 1 M, preferably equal to 10 2 M.
- the contacting step can be carried out for a period ranging from 12 hours to 36 hours, for example 24 hours.
- the contacting step does not require heating, which means, in other words, that it is carried out at room temperature, that is to say the temperature of the environment of the room, in which the process is implemented, this temperature being able to range from 15 ° C to 27 ° C, for example, 22 ° C.
- the contacting step may consist in immersing the glass comprising the lead in the solution comprising perchloric acid or, when the glass is in the form of a shaped product comprising a hollow cavity, such as a table glass or a carafe, to fill the cavity of this product with the solution comprising perchloric acid.
- the contacting step can be carried out with an aqueous solution of perchloric acid with a concentration ranging from 10 3 M to 10 1 M, preferably equal to 10 2 M, at room temperature (and more specifically , 22 ° C) for 24 hours.
- the method of the invention comprises a step of heat treatment at a temperature less than or equal to the glass transition temperature of the glass, preferably for a period ranging from 12 hours to 36 hours.
- the heat treatment step is carried out at a temperature below the glass transition temperature of the glass and, more specifically, up to 150 ° C. below the glass transition temperature of the glass.
- the heat treatment step can be carried out for a period ranging from 12 hours to 36 hours.
- the heat treatment step can be carried out at a temperature ranging from 200 ° C to 700 ° C, advantageously from 300 to 600 ° C and, more particularly, for a period ranging from 12 hours to 36 hours.
- the heat treatment step can be carried out at a temperature ranging from 400 to 500 ° C and, more particularly can be equal to 450 ° C.
- this heat treatment step can consist in heating the glass comprising lead in an enclosure heated to the appropriate temperature.
- glasses comprising at least 30% by mass of lead oxide PbO relative to the total mass of the glass (these glasses can be referred to as “30% higher crystal”).
- - objects for food use such as crockery such as table glasses, decanters
- -Objects for ornamental use such as jewelry.
- FIG. 1 is a graph illustrating the concentration of lead Cp b (in mg / L) for the various tests and for a reference for the first series of tests of Example 1 below.
- FIG. 2 is a graph illustrating the lead concentration Cp b (in mg / L) for the various tests, for a reference and a cemented glass powder for the second series of tests of Example 1 below.
- a first series of tests is carried out with a glass powder (more specifically, a commercial Baccarat glass comprising 24% by mass of PbO with a particle size of 63-125 ⁇ m, having a specific surface area of 535 cm . 2 g -1 and having a glass transition temperature of 458 ° C), said powder being subjected to the following conditions:
- the efficiency of these tests was measured based on the lead concentrations analyzed during the ISO 7086 test by bringing the powders from these different tests into contact with an acetic acid solution (4% by volume) for 24 hours at 22 ° C according to a ratio (glass surface / volume of solution, called S / V) of 1000 m 1 (i.e. 187 mg of glass powder in 10 mL of acetic acid solution) then by quantifying the lead content of the acetic acid solution.
- Figure 1 is a graph illustrating the lead concentration Cp b (in mg / L) for the different tests (curves b to q as defined above) and for a reference (indicated Ref., corresponding to the glass powder which has not undergone any treatment and constituting the reference lead content released in solution, curve a in FIG. 1).
- the most effective conditions with respect to the release of lead are those obtained with perchloric acid HCIO4 and, in particular, with a concentration of 10 3 mol.L 1 .
- FIG. 2 is a graph illustrating the concentration in lead Cp b (in mg / L) for the various tests mentioned above (curves b to i) and for a reference (indicated Ref., corresponding to the glass powder that has not undergone any treatment and constitutes the reference lead content released in solution, curve a in Figure 2) and, also, for a powder of case-hardened glass (indicated BAC-case-hardened, that is to say a glass powder having undergone a case-hardening treatment applied to decanters, curve j in FIG. 2), said case-hardened glass powder leading to a reduction in the concentration lead by a factor of 45 compared to the powder which has not undergone any treatment.
- case-hardened glass powder leading to a reduction in the concentration lead by a factor of 45 compared to the powder which has not undergone any treatment.
- the treatment with a 10 2 M perchloric acid solution with an annealing of 450 ° C leads to a performance of the same order of magnitude as the cemented glass powder but makes it possible to ensure better reproducibility. , knowing that this treatment is applicable on objects of complex shape, insofar as this treatment being carried out in liquid way allows the whole of the surface to be treated in a homogeneous manner.
- tests are carried out with glass objects of the crystal type and, more specifically, with a Baccarat glass and a Saint-Louis flute (these two objects being made of a glass having a glass transition temperature of 458 ° C).
- the objects thus treated are also subjected to an ISO 7086 test with an acetic acid solution (4% by volume) for 24 hours at 22 ° C, the volume of the solution being 50 mL (the S / V ratio being 100 m 1 for the Baccarat glass and 120 m 1 for the Saint-Louis flute). It emerges, from this test, that, for the two objects, the reduction factor of the lead release is 40 compared to the same untreated object.
Landscapes
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geochemistry & Mineralogy (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Surface Treatment Of Glass (AREA)
- Glass Compositions (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1910388A FR3101076B1 (fr) | 2019-09-20 | 2019-09-20 | Procédé de traitement d’un verre comprenant du plomb permettant de limiter la migration en solution du plomb contenu dans ce verre |
| PCT/FR2020/051622 WO2021053304A1 (fr) | 2019-09-20 | 2020-09-18 | Procédé de traitement d'un verre comprenant du plomb permettant de limiter la migration en solution du plomb contenu dans ce verre |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4013723A1 true EP4013723A1 (fr) | 2022-06-22 |
Family
ID=68987944
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20820264.8A Withdrawn EP4013723A1 (fr) | 2019-09-20 | 2020-09-18 | Procédé de traitement d'un verre comprenant du plomb permettant de limiter la migration en solution du plomb contenu dans ce verre |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11851365B2 (fr) |
| EP (1) | EP4013723A1 (fr) |
| JP (1) | JP2022549126A (fr) |
| CN (1) | CN114423719B (fr) |
| FR (1) | FR3101076B1 (fr) |
| WO (1) | WO2021053304A1 (fr) |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1496666C3 (de) | 1965-05-26 | 1974-04-04 | Erich Dipl.-Chem.Dr. 8000 Muenchen Saelzle | Verfahren zum Polieren von Glasgegenständen in einem Flußsäure und Schwefelsäure enthaltenden Polierbad |
| DE2218103C3 (de) * | 1972-04-14 | 1981-04-16 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren zum Auflösen von Bleiboratgläsern in Salpetersäure |
| DE2233721C3 (de) * | 1972-07-08 | 1975-05-15 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren zum Auflösen von Bleiboratgläsern |
| JP2710071B2 (ja) * | 1989-12-14 | 1998-02-10 | 日本電気硝子株式会社 | ガラス表面処理方法 |
| JPH03205325A (ja) * | 1989-12-28 | 1991-09-06 | Hoya Corp | 鉛含有クリスタルガラス食器 |
| US5232753A (en) * | 1990-05-23 | 1993-08-03 | Compagnie Des Cristalleries De Baccarat | Crystal flask treated with an alumino-silicate slip and heat |
| DE4102886A1 (de) * | 1991-01-31 | 1992-08-06 | Georg Van Eyk | Verfahren zur verringerung der abgabe von schwermetallen aus glaesern |
| JPH0579983A (ja) * | 1991-09-20 | 1993-03-30 | Sumitomo Electric Ind Ltd | ガラス中の希土類元素の分析方法 |
| DE4217057A1 (de) * | 1992-05-22 | 1993-11-25 | Saelzle Erich | Verfahren zur Verminderung der Blei- und/oder Bariumemission von Blei und/oder Barium enthaltenden Kristallglasgegenständen bei Berührung mit einer flüssigen Phase |
| FR2700764B1 (fr) | 1993-01-26 | 1995-04-14 | Lalique | Procédé pour le traitement de surface d'articles en verre, notamment en cristal et articles ainsi obtenus. |
| JPH08208276A (ja) * | 1995-01-30 | 1996-08-13 | Hoya Corp | 鉛含有ガラス製品の表面処理方法 |
| US20020192421A1 (en) * | 2001-05-22 | 2002-12-19 | Jennings Timothy Allan | Composite glassy carbon disk substrate for a data storage device and method for fabricating same |
| JP4626934B2 (ja) * | 2002-04-17 | 2011-02-09 | 五鈴精工硝子株式会社 | 液晶保護用ガラス |
| WO2004071685A1 (fr) * | 2003-02-14 | 2004-08-26 | Japan Science And Technology Agency | Procede de traitement de debris de verre |
| US20070040500A1 (en) * | 2003-11-07 | 2007-02-22 | Idemitsu Kosan Co., Ltd. | Barrier film for light-emitting display and method for producing same |
| JP5943349B2 (ja) * | 2012-10-03 | 2016-07-05 | 国立研究開発法人産業技術総合研究所 | 鉛含有ガラスの表面処理方法及び表面処理装置 |
| CN103837396B (zh) * | 2014-03-29 | 2017-01-04 | 安徽科技学院 | 一种水晶玻璃的消解方法和水晶玻璃铅含量的测定方法 |
| DE102014013527A1 (de) * | 2014-09-12 | 2016-03-17 | Schott Ag | Verfahren zur Herstellung eines beschichteten, chemisch vorgespannten Glassubstrats mit Antifingerprint-Eigenschaften sowie das hergestellte Glassubstrat |
| CN105585255B (zh) * | 2016-03-07 | 2017-12-19 | 秦皇岛玻璃工业研究设计院 | 一种防止含铅玻璃铅离子溶出的钝化设备和钝化方法 |
-
2019
- 2019-09-20 FR FR1910388A patent/FR3101076B1/fr active Active
-
2020
- 2020-09-18 JP JP2022517266A patent/JP2022549126A/ja active Pending
- 2020-09-18 EP EP20820264.8A patent/EP4013723A1/fr not_active Withdrawn
- 2020-09-18 US US17/753,924 patent/US11851365B2/en active Active
- 2020-09-18 CN CN202080066370.9A patent/CN114423719B/zh active Active
- 2020-09-18 WO PCT/FR2020/051622 patent/WO2021053304A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| US20220371950A1 (en) | 2022-11-24 |
| JP2022549126A (ja) | 2022-11-24 |
| CN114423719B (zh) | 2024-07-05 |
| US11851365B2 (en) | 2023-12-26 |
| CN114423719A (zh) | 2022-04-29 |
| WO2021053304A1 (fr) | 2021-03-25 |
| FR3101076B1 (fr) | 2022-01-14 |
| FR3101076A1 (fr) | 2021-03-26 |
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