SUSTAINABLE PREPARATION OF ORGANIC AMINO COMPOUNDS FOR THE PRODUCTION OF ORGANIC ISOCYANATES

WIPO Patent Application WO/2024/017890

A3

The invention relates to a process according to claim 1, in which nitric acid, as direct process product from a process for nitric acid preparation comprising the following steps: a) providing hydrogen gas (5d) and oxygen gas (5b) by performing a water electrolysis (5) in an electrolysis apparatus using electrical energy (10) produced from renewable energy and water (5c); b) providing ammonia (21b) as process product of a reaction of at least nitrogen (21a) and hydrogen gas (5d) from said water electrolysis (5) in an ammonia synthesis (21); c) preparing nitric acid (22) by reacting previously provided ammonia (21b) in a nitric acid preparation (22) at least with oxygen-containing gas (5e), is used for preparation 22 of organic amino compounds 17 for the synthesis of organic isocyanate compounds. Also described are the incorporation of this process into a process for preparing organic isocyanate compounds with these organic amino compounds, and an apparatus for performing the corresponding process.

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BULAN ANDREAS (DE)
ZABALZA GASTON (DE)
WEBER RAINER (DE)
SCHMIDT TIMM (DE)
LETMATHE BERND (DE)

PCT/EP2023/069921

March 14, 2024

July 18, 2023

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COVESTRO DEUTSCHLAND AG (DE)

C25B1/04; C01B3/34; C01B3/50; C01B21/26; C01B21/38; C01B32/40; C01B32/80; C01C1/04; C07C201/08; C07C209/32; C07C209/36; C07C263/10; C10K3/02; C25B1/23; C25B15/08

US20190185419A1	2019-06-20
US20210300759A1	2021-09-30

LEVPAT (DE)

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