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.)
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.)
Novartis AG
BASF Schweiz AG
Original Assignee
Ciba Geigy AG
Ciba AG
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Filing date
Publication date
Application filed by Ciba Geigy AG, Ciba AGfiledCriticalCiba Geigy AG
Publication of ES278641A1publicationCriticalpatent/ES278641A1/en
C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
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Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
Organic Low-Molecular-Weight Compounds And Preparation Thereof
(AREA)
Catalysts
(AREA)
Abstract
Process for the preparation of naphthalene-2-sulfonic acid, characterized in that sulfonated naphthalene at temperatures above 135º, by sulfuric acid between 85 and 60%. (Machine-translation by Google Translate, not legally binding)
ES278641A1961-06-261962-06-25Procedure for the preparation of naftalen-2-sulfonic acid (Machine-translation by Google Translate, not legally binding)
ExpiredES278641A1
(en)
Procedure for obtaining hormones and vitamins, especially b 12 of slow effect via via injectable (Machine-translation by Google Translate, not legally binding)