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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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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：US20180002185A1
公开(公告)日：2018-01-04
申请号：US15541406
申请日：2016-01-11
发明人： John David PACH , Daniel SHELDON , David WAILS
CPC分类号： C01C1/0488 , B01J23/56 , B01J23/8906 , B01J23/8953 , C01B3/025 , C01B2203/0233 , C01B2203/0244 , C01B2203/025 , C01B2203/0283 , C01B2203/044 , C01B2203/047 , C01B2203/0475 , C01B2203/048 , C01B2203/068 , C01B2203/1058 , C01B2203/1076 , C01C1/0411 , Y02C10/06 , Y02C10/08 , Y02P20/52
摘要： A process for production of ammonia includes: providing a reaction stream including carbon monoxide and hydrogen; passing the reaction stream and steam over a water gas shift catalyst in a catalytic shift reactor, forming a shifted gas mixture depleted in carbon monoxide and enriched in hydrogen; passing the shifted gas mixture with an oxygen-containing gas over a selective oxidation catalyst at ≧175° C., forming a selectively oxidized gas stream with a portion of the carbon monoxide converted to carbon dioxide; removing some of the carbon dioxide from the selectively oxidized gas stream in a carbon dioxide removal unit; passing the carbon dioxide depleted stream over a methanation catalyst in a methanator to form a methanated gas stream, optionally adjusting its hydrogen:nitrogen molar ratio to form an ammonia synthesis gas; and passing the ammonia synthesis gas over an ammonia synthesis catalyst in an ammonia converter to form ammonia.
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