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公开(公告)号：US20190031604A1
公开(公告)日：2019-01-31
申请号：US16062748
申请日：2016-11-28
发明人： Ola ERLANDSSON , Andreas Erik Johan MAGNUSSON , Kate MCFARLANE , John David PACH , Daniel Thomas SHELDON , Darren WARD
IPC分类号： C07C273/14 , C07C273/10 , C01C1/04 , C01B3/50 , C07C45/29 , C07C29/151 , C07C1/20
CPC分类号： C07C273/14 , C01B3/50 , C01B2203/0283 , C01B2203/061 , C01B2203/062 , C01B2203/068 , C01C1/0405 , C01C1/0488 , C07C1/20 , C07C29/1516 , C07C29/1518 , C07C45/29 , C07C45/38 , C07C273/04 , C07C273/10 , Y02P20/125
摘要： A process for the production of formaldehyde-stabilised urea is described comprising the steps of: (a) generating a synthesis gas comprising hydrogen, nitrogen, carbon monoxide, carbon dioxide and steam in a synthesis gas generation unit, (b) subjecting the synthesis gas to one or more stages of water-gas shift in one or more water-gas shift reactors to form a shifted gas; (c) recovering carbon dioxide from the shifted gas in a carbon dioxide removal unit to form a carbon dioxide-depleted synthesis gas; (d) synthesising methanol from the carbon dioxide-depleted synthesis gas in a methanol synthesis unit and recovering the methanol and a methanol synthesis off-gas comprising nitrogen, hydrogen and residual carbon monoxide; (e) subjecting at least a portion of the recovered methanol to oxidation with air in a formaldehyde production unit; (f) subjecting the methanol synthesis off-gas to methanation in a methanation reactor containing a methanation catalyst to form an ammonia synthesis gas; (g) synthesising ammonia from the ammonia synthesis gas in an ammonia production unit and recovering the ammonia; (h) reacting a portion of the ammonia and at least a portion of the recovered carbon dioxide stream in a urea production unit to form a urea stream; and (i) stabilising the urea by mixing the urea stream and a stabiliser prepared using formaldehyde recovered from the formaldehyde production unit, wherein a portion of the synthesis gas generated by the synthesis gas generation unit by-passes either the one or more water-gas shift reactors; the carbon dioxide removal unit; or the one or more water-gas shift reactors and the carbon dioxide removal unit.
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公开(公告)号：US20180072658A1
公开(公告)日：2018-03-15
申请号：US15552063
申请日：2015-12-18
IPC分类号： C07C273/14 , C01B3/02 , C01B3/48 , C01B3/52 , C01B3/56 , C01C1/04 , C07C273/10 , C07C45/38 , C07C45/29 , C10J3/82 , C07C29/151
CPC分类号： C07C273/14 , C01B3/025 , C01B3/382 , C01B3/48 , C01B3/52 , C01B3/54 , C01B3/56 , C01B3/586 , C01B2203/0233 , C01B2203/0244 , C01B2203/0283 , C01B2203/0415 , C01B2203/042 , C01B2203/0445 , C01B2203/047 , C01B2203/0475 , C01B2203/06 , C01B2203/061 , C01B2203/062 , C01B2203/068 , C01B2203/1241 , C01B2203/1252 , C01B2203/142 , C01C1/0488 , C07C29/1518 , C07C45/29 , C07C45/38 , C07C273/04 , C07C273/10 , C10J3/82 , C10J2300/0916 , C10J2300/093 , C10J2300/0956 , C10J2300/0976 , C10J2300/1838 , C10J2300/1853 , Y02P20/125 , Y02P20/52 , C07C31/04 , C07C47/04
摘要： A process for the production of formaldehyde-stabilised urea is described comprising the steps of: (a) generating a synthesis gas comprising hydrogen, nitrogen, carbon monoxide, carbon dioxide and steam in a synthesis gas generation unit; (b) recovering carbon dioxide from the synthesis gas to form a carbon dioxide-depleted synthesis gas; (c) synthesising methanol from the carbon dioxide-depleted synthesis gas in a methanol synthesis unit and recovering the methanol and a methanol synthesis off-gas comprising nitrogen, hydrogen and residual carbon monoxide; (d) subjecting at least a portion of the recovered methanol to oxidation with air in a formaldehyde production unit; (e) subjecting the methanol synthesis off-gas to methanation in a methanation reactor containing a methanation catalyst to form an ammonia synthesis gas; (f) synthesising ammonia from the ammonia synthesis gas in an ammonia production unit and recovering the ammonia; (g) reacting a portion of the ammonia and at least a portion of the recovered carbon dioxide stream in a urea production unit to form a urea stream; and (h) stabilising the urea by mixing the urea stream and a stabiliser prepared using formaldehyde recovered from the formaldehyde production unit, wherein a source of air is compressed and divided into first and second portions, the first portion is provided to the formaldehyde production unit for the oxidation of methanol and the second portion is further compressed and provided to the synthesis gas generation unit.
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公开(公告)号：US20180072659A1
公开(公告)日：2018-03-15
申请号：US15552072
申请日：2015-12-18
IPC分类号： C07C273/14 , C01B3/02 , C01C1/04 , C01B3/38 , C01B3/48 , C01B3/52 , C01B3/56 , C07C29/151 , C07C45/29 , C07C45/38 , C07C273/10 , C10J3/82
CPC分类号： C07C273/14 , C01B3/025 , C01B3/382 , C01B3/48 , C01B3/52 , C01B3/56 , C01B2203/0233 , C01B2203/0244 , C01B2203/025 , C01B2203/0283 , C01B2203/0415 , C01B2203/042 , C01B2203/043 , C01B2203/0475 , C01B2203/061 , C01B2203/062 , C01B2203/068 , C01B2203/1241 , C01B2203/1252 , C01B2203/141 , C01B2203/142 , C01B2203/145 , C01B2203/148 , C01C1/0488 , C07C29/1518 , C07C45/29 , C07C45/38 , C07C273/04 , C07C273/10 , C10J3/82 , C10J2300/0916 , C10J2300/093 , C10J2300/0956 , C10J2300/0959 , C10J2300/0976 , C10J2300/1838 , C10J2300/1853 , Y02E50/18 , Y02P20/52 , C07C31/04 , C07C47/04
摘要： A process is described for the production of formaldehyde, comprising (a) subjecting methanol to oxidation with air in a formaldehyde production unit thereby producing a formaldehyde-containing stream; (b) separating said formaldehyde-containing stream into a formaldehyde product stream and a formaldehyde vent gas stream; wherein the vent gas stream, optionally after treatment in a vent gas treatment unit, is passed to one or more stages of: (i) synthesis gas generation, (ii) carbon dioxide removal, (iii) methanol synthesis or (iv) urea synthesis.
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