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CH3OMGOCO2CH3·XCO2 [1 record]
Record 1 - internal organization data 2011-01-24
Record 1, English
Record 1, Subject field(s)
- Chemical Elements and Compounds
- Paper Manufacturing Processes
Universal entry(ies) Record 1
Record 1, Main entry term, English
- methyl magnesium carbonate
1, record 1, English, methyl%20magnesium%20carbonate
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 OBS
An organic compound, CH3OMgOCO2CH3·xCO2, with x being variable depending on the solvent used. It is prepared by treating a solution of magnesium methoxide with carbon dioxide until saturation is attained. The resulting solution is clear, colorless, and has a pH of approximately 7.0. It has been recommended as a non-aqueous deacidifying agent for paper, preferably in low concentrations, e.g., 0.7 to 1.0%. Its advantages are said to be: 1) a mild pH, due to the neutral character of the solution and direct conversion to magnesium carbonate upon hydrolysis; and 2) convenience of use due to the decreased sensitivity of the solution to water, which assists in preventing premature precipitation. 2, record 1, English, - methyl%20magnesium%20carbonate
Record number: 1, Textual support number: 2 OBS
Chemical formula: (CH3OMgOCO2CH3·xCO2) with x being variable depending on the solvent used. 3, record 1, English, - methyl%20magnesium%20carbonate
Record 1, French
Record 1, Domaine(s)
- Éléments et composés chimiques
- Fabrication du papier
Entrée(s) universelle(s) Record 1
Record 1, Main entry term, French
- carbonate de méthylmagnésium
1, record 1, French, carbonate%20de%20m%C3%A9thylmagn%C3%A9sium
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Produit chimique utilisé dans la désacidification du papier ainsi que pour préserver ce dernier. 2, record 1, French, - carbonate%20de%20m%C3%A9thylmagn%C3%A9sium
Record number: 1, Textual support number: 1 CONT
Pour éliminer l'acidité interne des papiers, les bibliothèques ont recours à la désacidification de masse du papier. Il s'agit de neutraliser l'acide fort ou faible par une base forte. [...] Les procédés de désacidification de masse sont nombreux : - procédé au carbonate de méthylmagnésium, utilisé par la Bibliothèque Nationale. - procédé Bookkeeper. - procédé au diéthyl-zinc. - procédé lithco-FMC. - procédé Booksaver. - procédé de la British library. 3, record 1, French, - carbonate%20de%20m%C3%A9thylmagn%C3%A9sium
Record number: 1, Textual support number: 1 OBS
Formule chimique : CH3OMgOCO2CH3·xCO2, la variable «x» étant fonction du solvant utilisé. 4, record 1, French, - carbonate%20de%20m%C3%A9thylmagn%C3%A9sium
Record 1, Spanish
Record 1, Textual support, Spanish
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