GB1430871A - Catalytic synthesis of ammonia - Google Patents

Catalytic synthesis of ammonia

Info

Publication number
GB1430871A
GB1430871A GB2294073A GB2294073A GB1430871A GB 1430871 A GB1430871 A GB 1430871A GB 2294073 A GB2294073 A GB 2294073A GB 2294073 A GB2294073 A GB 2294073A GB 1430871 A GB1430871 A GB 1430871A
Authority
GB
United Kingdom
Prior art keywords
gases
catalyst
mixing chamber
contain
leaving
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2294073A
Inventor
Amilcare Collina
Emanuele Malfatti
Antonio Cappelli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Edison SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from IT24342/72A external-priority patent/IT955511B/en
Priority claimed from IT3185472A external-priority patent/IT972247B/en
Priority claimed from IT3345572A external-priority patent/IT1045612B/en
Application filed by Montedison SpA, Montecatini Edison SpA filed Critical Montedison SpA
Publication of GB1430871A publication Critical patent/GB1430871A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/02—Preparation, purification or separation of ammonia
    • C01C1/04—Preparation of ammonia by synthesis in the gas phase
    • C01C1/0405—Preparation of ammonia by synthesis in the gas phase from N2 and H2 in presence of a catalyst
    • C01C1/0417—Preparation of ammonia by synthesis in the gas phase from N2 and H2 in presence of a catalyst characterised by the synthesis reactor, e.g. arrangement of catalyst beds and heat exchangers in the reactor
    • C01C1/0423—Cold wall reactors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
    • B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
    • B01J8/0207—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid flow within the bed being predominantly horizontal
    • B01J8/0214—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds the fluid flow within the bed being predominantly horizontal in a cylindrical annular shaped bed
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C1/00—Ammonia; Compounds thereof
    • C01C1/02—Preparation, purification or separation of ammonia
    • C01C1/04—Preparation of ammonia by synthesis in the gas phase
    • C01C1/0405—Preparation of ammonia by synthesis in the gas phase from N2 and H2 in presence of a catalyst
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/584—Recycling of catalysts

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Analytical Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
  • Catalysts (AREA)

Abstract

1430871 Catalytic ammonia synthesis MONTECATINI EDISON SpA 14 May 1973 [15 May 1972 20 Nov 1972 22 Dec 1972] 22940/73 Heading C1A NH 3 is synthesised at a temp. of 300-600‹ C. and a pressure of 100-450 kg./cm.<SP>2</SP> using an adiabatic layer of an Fe catalyst, wherein (a) the gases leaving the catalyst contain at least 12 mol per cent NH 3 and 30-80% by vol. of these gases are recycled to the catalyst inlet, and (b) the difference between the NH 3 concentration of gases entering and leaving the catalyst is 3-6 mol per cent. Reactant gases 1 which may include 3-8À5% NH 3 in addition to N 2 and H 2 introduce into the cylindrical pressure vessel 2 are mixed via injector 5 with recycle gases 6 in a mixing chamber 7 which forms a Venturi tube together with lower section 8. The mixed gases which may contain 14À5-17% NH 3 pass from tube 8 into annular chamber 9 surrounding the Venturi tube and then into the catalyst bed 10 supported in the annular basket 11. The gases leaving the catalyst bed which may contain 18- 23% NH 3 pass via annular chamber 12 partly to the outlet 14 and partly back to the mixing chamber as recycle. The gases recycling may be cooled by indirect heat exchange with water and the heat removed used to warm up the unreacted incoming gases. The gases leaving the reactor via 14 are cooled by indirect heat exchange with water and the gases which may contain- 3-8À5% NH 3 combined with N 2 and H 2 , and recycled to the reactor. The relative dimensions of the Venturi tube are as follows:- (a) ratio of crosssection of mixing chamber to injector outlet may be 3 : 1 to 10 : 1, (b) ratio of cross-section of Venturi outlet to mixing chamber may be 10 : 1 to 18 : 1 and (c) ratio of length to diameter of mixing chamber may be 6 : 1 to 10 : 1. The space velocity may be 20,000-70,000 h<SP>-1</SP>.
GB2294073A 1972-05-15 1973-05-14 Catalytic synthesis of ammonia Expired GB1430871A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
IT24342/72A IT955511B (en) 1972-05-15 1972-05-15 PROCESS PERFECTED FOR THE SINTE SI CATALYTIC OF METHANOL AND L AMMONIA
IT3185472A IT972247B (en) 1972-11-20 1972-11-20 PROCESS FOR THE SYNTHESIS OF THE AMMO NIACA AND REACTOR FOR THE SAME
IT3345572A IT1045612B (en) 1972-12-22 1972-12-22 Ammonia synthesis - using an adiabatic catalyst at high temp and pressure, with recycling

Publications (1)

Publication Number Publication Date
GB1430871A true GB1430871A (en) 1976-04-07

Family

ID=27273390

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2294073A Expired GB1430871A (en) 1972-05-15 1973-05-14 Catalytic synthesis of ammonia

Country Status (10)

Country Link
AR (1) AR195111A1 (en)
AT (1) AT331816B (en)
CA (1) CA994523A (en)
DE (1) DE2324352A1 (en)
ES (1) ES414739A1 (en)
FR (1) FR2184697B1 (en)
GB (1) GB1430871A (en)
NL (1) NL7306515A (en)
PL (1) PL92096B1 (en)
SE (1) SE383630B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109847659A (en) * 2019-01-16 2019-06-07 华陆工程科技有限责任公司 A kind of guide cylinder type vinyl ethers product reactor
CN112844250A (en) * 2021-01-15 2021-05-28 陈龙洞 Preparation process of water reducing agent for concrete

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3640823A1 (en) * 1986-11-28 1988-06-09 Uhde Gmbh METHOD FOR THE SYNTHESIS OF AMMONIA

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1295866A (en) * 1960-07-26 1962-06-08 Wargons Ab Catalysts for the synthesis of ammonia and their preparation
DE1667323C3 (en) * 1967-11-21 1974-11-21 Friedrich Uhde Gmbh, 4600 Dortmund Device for carrying out exothermic catalytic gas reactions for the synthesis of ammonia and methanol
DE1667161C3 (en) * 1968-02-08 1973-10-31 Lentia Gmbh, Chem. U. Pharm. Erzeugnisse - Industriebedarf, 8000 Muenchen Process and device for gas flow in catalytic high pressure synthesis plants

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109847659A (en) * 2019-01-16 2019-06-07 华陆工程科技有限责任公司 A kind of guide cylinder type vinyl ethers product reactor
CN112844250A (en) * 2021-01-15 2021-05-28 陈龙洞 Preparation process of water reducing agent for concrete

Also Published As

Publication number Publication date
FR2184697A1 (en) 1973-12-28
AR195111A1 (en) 1973-09-10
DE2324352A1 (en) 1973-12-06
NL7306515A (en) 1973-11-19
FR2184697B1 (en) 1976-04-23
ATA419873A (en) 1975-12-15
CA994523A (en) 1976-08-10
PL92096B1 (en) 1977-03-31
SE383630B (en) 1976-03-22
AT331816B (en) 1976-08-25
ES414739A1 (en) 1976-06-01

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee