GB821139A - Improved method for the manufacture of hydrogen cyanide - Google Patents

Improved method for the manufacture of hydrogen cyanide

Info

Publication number
GB821139A
GB821139A GB3371/56A GB337156A GB821139A GB 821139 A GB821139 A GB 821139A GB 3371/56 A GB3371/56 A GB 3371/56A GB 337156 A GB337156 A GB 337156A GB 821139 A GB821139 A GB 821139A
Authority
GB
United Kingdom
Prior art keywords
catalyst surface
methane
platinum
heated catalyst
gas
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
GB3371/56A
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.)
Lonza Electric and Chemical Works Ltd
Original Assignee
Lonza Electric and Chemical Works Ltd
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
Application filed by Lonza Electric and Chemical Works Ltd filed Critical Lonza Electric and Chemical Works Ltd
Publication of GB821139A publication Critical patent/GB821139A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00—Cyanogen; Compounds thereof
    • C01C3/02—Preparation, separation or purification of hydrogen cyanide
    • C01C3/0208—Preparation in gaseous phase
    • C01C3/0229—Preparation in gaseous phase from hydrocarbons and ammonia in the absence of oxygen, e.g. HMA-process
    • C01C3/0233—Preparation in gaseous phase from hydrocarbons and ammonia in the absence of oxygen, e.g. HMA-process making use of fluidised beds, e.g. the Shawinigan-process

Abstract

Hydrogen cyanide is produced by passing a mixture of methane, ethane, propane or butane and ammonia at a temperature of ca. 900-1400 DEG C., preferably 1100-1250 DEG C., through an annular reaction chamber formed by two concentric tubes at least one of which is provided with a heated catalyst surface in contact with the gas mixture at a velocity of 25-200 m./sec., the dimensions of the chamber and the extent of heating thereof being such that (a) the cross-sectional area of the chamber is at least 2 sq. cm., (b) the maximum distance of the gas molecules from the nearest part of the heated catalyst surface is 1.5-10 mm., preferably 3-5 mm., (c) the ratio of cross-sectional area to heated catalyst surface is 1 : 200-800, (d) the length of heated surface is 60-300 cm., and (e) the contact time of the gas with the heated catalyst surface is 0.02-0.06 sec. Mixtures of the hydrocarbons specified or natural gas may be used instead of a single hydrocarbon. When using methane the ratio of ammonia to methane may be 1 : 0.85-1.1. The tube may be of sillimanite or chrome-nickel steel. The catalyst may be platinum-ruthenium, platinumrhodium, platinum - iridium - rhodium or platinum-palladium-rhodium. Electric heating elements may be arranged outside the outer tube or both outside the outer tube and inside the inner tube. A number of tubes may be arranged in parallel.
GB3371/56A 1955-02-03 1956-02-02 Improved method for the manufacture of hydrogen cyanide Expired GB821139A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH821139X 1955-02-03

Publications (1)

Publication Number Publication Date
GB821139A true GB821139A (en) 1959-09-30

Family

ID=4539447

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3371/56A Expired GB821139A (en) 1955-02-03 1956-02-02 Improved method for the manufacture of hydrogen cyanide

Country Status (1)

Country Link
GB (1) GB821139A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2453108A1 (en) * 1979-04-06 1980-10-31 Degussa PROCESS FOR THE MANUFACTURE OF CYANHYDRIC ACID
WO2006050781A2 (en) * 2004-11-12 2006-05-18 Degussa Gmbh Method for producing hydrogen cyanide and a reaction tube used for carrying out said method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2453108A1 (en) * 1979-04-06 1980-10-31 Degussa PROCESS FOR THE MANUFACTURE OF CYANHYDRIC ACID
US4289741A (en) * 1979-04-06 1981-09-15 Degussa Aktiengesellschaft Process for the production of hydrogen cyanide
WO2006050781A2 (en) * 2004-11-12 2006-05-18 Degussa Gmbh Method for producing hydrogen cyanide and a reaction tube used for carrying out said method
WO2006050781A3 (en) * 2004-11-12 2007-01-25 Degussa Method for producing hydrogen cyanide and a reaction tube used for carrying out said method

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