![具有受控的过量CO2和/或NH3的尿素方法](/CN/2018/8/2/images/201880014465.jpg)
基本信息:
- 专利标题: 具有受控的过量CO2和/或NH3的尿素方法
- 专利标题(英):UREA PROCESS WITH CONTROLLED EXCESS OF CO[2] AND/OR NH[3]
- 申请号:CN201880014465.9 申请日:2018-03-07
- 公开(公告)号:CN110366538A 公开(公告)日:2019-10-22
- 发明人: C·H·斯佩斯 , P·J·达尔 , A·E·克勒尔延森 , N·C·施约德特 , M·西莫伦
- 申请人: 托普索公司
- 申请人地址: 丹麦灵比市
- 专利权人: 托普索公司
- 当前专利权人: 托普索公司
- 当前专利权人地址: 丹麦灵比市
- 代理机构: 隆天知识产权代理有限公司
- 代理人: 张福根; 吴小瑛
- 国际申请: PCT/EP2018/055668 2018.03.07
- 国际公布: WO2018/162594 EN 2018.09.13
- 进入国家日期: 2019-08-28
- 主分类号: C01C1/04
- IPC分类号: C01C1/04 ; C07C273/04 ; C01B3/02
A process for producing UREA, said process comprising the steps of: purification of a hydrocarbon feed gas to remove sulphur and/or chloride components if present, reforming the hydrocarbon feed gas in a reforming step where the steam/carbon ratio is less than 2.6 thereby obtaining a synthesis gas comprising CH[4], CO, CO[2], H[2] and H[2]O, optionally adding H[2]O to the synthesis gas from the reforming step to maintain an overall steam/carbon less than 2.6, shifting the synthesis gas in a shift section comprising one or more shift steps preferably in series, optionally washing the synthesisgas leaving the shift section with water, removing CO[2] from the synthesis gas from the shift section in a CO[2] removal step to obtain a synthesis gas with less than 500 ppm CO[2], preferably less than 20 ppm CO[2] and a CO[2] product gas, removing residual H[2]O and/or CO[2] from the synthesis gas preferably in an absorbent step, removing CH[4],CO, Ar and/or He preferably in a nitrogen wash unit and adding stoichiometric nitrogen to produce NH[3]to the synthesis gas, synthesizing NH[3] to obtain a NH[3] product, adding at least part of the product CO[2] and at least part of the NH[3] product to a UREA synthesis step to make a UREA product, Wherein the amount of excess CO[2] and/or NH[3] is controlled by adjusting the steam/carbon in the reforming step and/or the H[2]O addition upstreamthe shift step and/or adjusting the inlet temperature to at least one of the one or more shift steps.