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:
Oct. 21, 2025
Filed:
Mar. 12, 2021
Conser S.p.a., Rome, IT;
CONSER S.P.A., Rome, IT;
Abstract
A process for the efficient co-production of dialkyl-succinate and 1,4-butanediol by catalytic hydrogenation of dialkyl maleate comprising essentially the following steps: (i) hydrogenating a stream of dialkyl maleate in a first stage of reaction over suitable catalyst to produce dialkyl succinate; (ii) separating the effluent from the first stage of reaction in a flash vessel to produce a liquid stream, rich in dialkyl succinate; (iii) further hydrogenating part of the dialkyl succinate produced in the first stage of reaction in a second stage of reaction, by using the hydrogen gas from the first stage and by means of a different suitable catalyst, for producing mainly 1,4-butanediol, wherein in both stages of reaction, the conditions as hydrogen/organic feed ratio, pressure and temperature are such to maintain the reactors in mixed liquid/vapor phase.