# US 2023/0278000 A1 · Phosgene production unit > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2023/0278000 A1 - Document ID: US20230278000A1 - Status: Published application - Kind: A1 - Application number: 18/017,679 - Filed: 2021-07-27 - Published: 2023-09-07 - Earliest claimed: 2020-07-27 - Assignees: BASF SE - Applicants: BASF SE - Inventors: Jan Pablo JOSCH; Stefan ENGELS - Web page: https://patentgrep.com/patent/US20230278000A1 ## CPC - B01J 19/24: Stationary reactors without moving elements inside (B01J19/08, B01J19/26 take precedence; with stationary particles B01J8/02) - C01B 32/80: Phosgene - B01J 2219/0002: Plants assembled from modules joined together - B01J 2219/00036: Intermittent processes - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} ## Abstract A unit for producing and/or processing phosgene, preferably for producing and processing phosgene, said unit being configured for at least one production mode and at least one maintenance mode and comprising a structure which defines a confined space in a production mode, wherein (i) the confined space contains at least one apparatus for producing phosgene, or for processing phosgene, or for producing and processing phosgene; (ii) the structure comprises at least one openable and lockable transfer means for temporary removal, in a maintenance mode, of at least part of at least one apparatus according to (i) from the structure through at least one of said transfer means in opened state. ## Claims ### Claim at position 1 -15. (canceled) ### Claim 16 A unit for producing and/or processing phosgene, said unit being configured for at least one production mode and at least one maintenance mode and comprising a structure which defines a confined space in a production mode, wherein (i) the confined space contains at least one apparatus for producing phosgene, or for processing phosgene, or for producing and processing phosgene; (ii) the structure comprises at least one openable and lockable transfer means for temporary removal, in a maintenance mode, of at least part of at least one apparatus according to (i) from the structure through at least one of said transfer means in opened state. ### Claim 17 (depends on 16) The unit of claim 16, wherein the structure comprises from 1 to 1000 openable and lockable transfer means. ### Claim 18 (depends on 16) The unit of claim 16, wherein (iii) the structure further comprises at least one openable and lockable access means for temporary access, in a maintenance mode, of at least one of the apparatuses according to (i) from outside the structure. ### Claim 19 (depends on 18) The unit of claim 18, wherein the structure comprises from 1 to 100 openable and lockable access means. ### Claim 20 (depends on 18) The unit of claim 18, wherein an openable and lockable access means according to (iii) is an upper part of said structure, said structure comprising a lower part and said upper part being located, in a production mode, on said lower part, the at least one apparatus according to (i) being located on said lower part, said upper part comprising the openable and lockable transfer means and optionally one or more further openable and lockable access means according to (iii). ### Claim 21 (depends on 16) The unit of claim 16, wherein the confined space according to (i) contains from 1 to 100 apparatuses according to (i). ### Claim 22 (depends on 16) The unit of claim 16, wherein the structure comprises a housing, wherein (iv) at least one opening is provided in said housing and at least one closing element for said opening is provided, said opening and said at least one closing element together forming the openable and lockable transfer means according to (ii). ### Claim 23 (depends on 22) The unit of claim 22, wherein at least part of the housing is in form of a skeleton to which a plurality of removable panels are removably attached, said removable panels forming closing elements according to (iv). ### Claim 24 (depends on 22) The unit of claim 22, insofar as directly or indirectly referring to embodiment 3 or 4, wherein (v) at least one opening other than the at least one opening according to (iv) is provided in said housing and at least one closing element other than the at least one closing element according to (iv) for said opening is provided, said opening and said at least one closing element together forming the openable and lockable access means according to (iii). ### Claim 25 (depends on 16) The unit of claim 16, wherein the confined space according to (i) contains (i.a) at least one apparatus for producing phosgene, and (i.b) at least one apparatus for processing phosgene. ### Claim 26 (depends on 25) The unit of claim 25, wherein at least in a production mode the confined space according to (i) is sub-divided into (i.i) at least one sub-space which contains at least one apparatus for producing phosgene according to (i.a); (i.ii) at least one sub-space, other than the at least one sub-space according to (i.i), which contains at least one apparatus for processing phosgene according to (i.b). ### Claim 27 A unit for producing and/or processing phosgene, said unit being configured for at least one production mode and at least one maintenance mode and comprising a structure which defines a confined space in a production mode, wherein (i) the confined space contains at least one apparatus for producing phosgene, or for processing phosgene, or for producing and processing phosgene; (iii) the structure comprises an openable and lockable access means for temporary access, in a maintenance mode, of the at least one apparatus according to (i) from outside the structure; wherein said openable and lockable access means according to (iii) is an upper part of said structure and said structure further comprises a lower part on which said upper part is movably or removably mounted in a production mode; and wherein the at least one apparatus according to (i) is located on said lower part. ### Claim 28 (depends on 16) The unit of claim 16, being comprised in a production plant. ### Claim 29 (depends on 16) A production plant comprising a unit according to claim 16. ### Claim 30 (depends on 16) Use of a unit according to claim 16 in a production plant.