The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 22, 1995
Filed:
Dec. 20, 1993
Frank Wiessner, Munich, DE;
Linde Aktiengesellschaft, Wiesbaden, DE;
Abstract
The conversion of formaldehyde and acetylene in the presence of a suspension catalyst to butynediol is usually performed in a cascade of reactors, wherein the separation of the catalyst from the product solution takes place per individual reactor. This can be performed by filters installed in the reactor or by suitable filter apparatuses outside the reactor. A part of the catalyst present in the reactors can be drawn off and replaced by regenerated and/or fresh catalyst. The catalyst drawn off from the reactors can advantageously be fed to a regeneration. The replacement of the catalyst in the reactor can take place discontinuously or continuously. In the reactors of the cascade, a catalyst amount of 50-200 g, preferably of 75-125 g, per liter of reaction solution is used.