IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0894859
(1986-08-08)
|
| 우선권정보 |
GB-0005591 (1984-03-02); GB-0017016 (1984-07-04); GB-0017017 (1984-07-04); GB-0025508 (1984-10-09); GB-0013997 (1985-06-04); GB-0015392 (1985-06-18); GB-0020892 (1985-08-21) |
|
발명자
/ 주소 |
- Pinto Alwyn (Middlesbrough GB2)
|
| 출원인 / 주소 |
- Imperial Chemical Industries PLC (London GB2 03)
|
| 인용정보 |
피인용 횟수 :
25 인용 특허 :
0 |
초록
▼
Production of ammonia synthesis gas by partial oxidation of a hydrocarbon feedstock, using air, oxygen enriched air, or oxygen depleted air, in admixture with steam, followed by shift and the removal of the excess of nitrogen, and also impurities such as carbon oxides and methane, by pressure swing
Production of ammonia synthesis gas by partial oxidation of a hydrocarbon feedstock, using air, oxygen enriched air, or oxygen depleted air, in admixture with steam, followed by shift and the removal of the excess of nitrogen, and also impurities such as carbon oxides and methane, by pressure swing adsorption (PSA). The PSA waste gas is combusted and used to heat the air and/or steam prior to the use thereof in the partial oxidation.
대표청구항
▼
A process for the production of ammonia synthesis gas comprising: (a) forming a heated gas stream at a temperature of at least 500°C. and consisting of steam and a gas, containing nitrogen and oxygen and having an oxygen content in the range 15 to 35% by volume, selected from air, oxygen depleted ai
A process for the production of ammonia synthesis gas comprising: (a) forming a heated gas stream at a temperature of at least 500°C. and consisting of steam and a gas, containing nitrogen and oxygen and having an oxygen content in the range 15 to 35% by volume, selected from air, oxygen depleted air, and oxygen enriched air; (b) reacting a hydrocarbon feedstock stream with said heated gas stream to give a reformed gas stream containing carbon oxides, hydrogen, nitrogen, methane, noble gases and excess steam, the reactant proportions and the process conditions being such that the volume ratio of the sum of hydrogen and carbon monoxide to nitrogen in said reformed gas stream is at least 1.2, and the amount of nitrogen is in an excess of that required in the ammonia synthesis gas; (c) cooling the reformed gas stream and subjecting the cooled gas stream to catalytic shift reaction under process conditions such as to produce a shifted gas stream having a carbon monoxide content under 1% by volume on a dry basis; (d) cooling the shifted gas stream and separating unreacted steam therefrom as liquid water so as to produce a raw gas stream; (e) removing carbon oxides, methane, and the excess of nitrogen from the raw gas stream, methane, the excess of nitrogen, and at least part of the carbon dioxide and carbon monoxide, being removed by a pressure swing desorption process producing a product gas stream containing hydrogen and nitrogen and a waste gas stream containing carbon dioxide, nitrogen, methane, carbon monoxide, and some hydrogen; and (f) burning the waste gas stream and, by heat exchange with the combustion products thereof, heating the steam and/or the gas containing nitrogen and oxygen, whereby the heated gas stream formed from said stream and said gas containing nitrogen and oxygen has said temperature above 500°C.
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