DE570026C - Process for the catalytic conversion of hydrocarbons - Google Patents

Description

Process for the catalytic conversion of hydrocarbons Es is known to convert hydrocarbons into carbon dioxide @ Vasserstoi-t mixtures, by exposing them to steam or carbonic acid at higher temperatures over catalysts leads. These reactions are strongly endothermic, and since they only occur at a higher temperature going on, it is difficult. supply the required heat. To the solution Various ways have already been given to this task; for example has one suggested. a \ -burning occurs simultaneously with the reaction by steam to allow any heating gases to take place or to alternate the reaction space pickling or finally the implementation in externally heated pipes made of stainless steel to let go. In the latter process, "temperatures of jooo" and applied above. However, this procedure has not achieved practical importance, because at the high temperature the wall material is worn too much and the yields Remain coagulated because only weakly effective catalysts are used here.

It has been found that the process works without difficulty Continuous operation with high yields can be carried out if the gases are used via activated cat lysers it leads to elongated rooms, the edges of which are made of stainless steel, especially chrome-nickel steel, or high-quality nickel alloy runner. like chrome nickel, and that are heated from the outside to temperatures below rooo °, preferably by means of hot combustion gases. As elongated rooms z. B. tubes of no too large cross-section, e.g. B. of = oo qcm and less, into consideration. You can z. B. use a tubular boiler and either place the catalyst in the Ruhrc and direct hot combustion gases through the space traversed by the pipes or else proceed in reverse. The catalysts used are e.g. B. with clay, -1, lagnesia and the like activated nickel, because end gases that are low in hydrocarbons are obtained intended for use in syntheses, e.g. 13. in the synthesis of ammonia, excellent are suitable. If essentially hydrogen and no carbon oxide is desired, so one can add such to the entire caialyzer or to the last part of it Mix in catalysts which accelerate the conversion of hollow oxide into finite water vapor. If the starting materials are heavily contaminated, in particular by organic sulfur compounds, so these must first be removed, z. B. by passing the Mixture about metal oxides heated to 3oo = or according to any other known \, -.

Other gases can also be added to a hydrocarbon / steam or carbonic acid mixture, in particular oxygen or air or otherwise. The hydrocarbons can also be treated in two stages and they can be treated in the first stage, optionally with the addition of oxygen or air Exposure to temperatures in such a way that the mixture obtained still has a noticeable content of hydrocarbons, and in the second stage then brings about a complete reaction C, "H", 6% Co, .3 zo: o H., 3 ioo CH, 6 0'0 \ "are heated with about 100 kg of water vapor that has been superheated from outside to temperatures of (100 to 100, in Tubes made of stainless steel, consisting of activated Ni, with A1. = 0 .; A gas is produced with approximately the following composition: 14.5% CO ,,; S ob HJ, 4.6% CO, 0.2 0.10 CI-1 "2 .;% N =.

Claims (1)

PATTERN CLAIM: i. Process for the catalytic conversion of expedient Purified hydrocarbons by means of steam or carbonic acid in carbon-oxide-hydrogen mixtures by combining several partly known measures, characterized in that that one passes the gases over activated catalysts in elongated spaces, their Walls made of stainless steel, in particular chrome-nickel steel, or high-quality nickel alloys, such as chromium-nickel, and which are heated from the outside to temperatures below 100 ° - preferably by means of hot combustion gases. z. Method according to claim i. characterized in that the method is carried out in two stages; that in the first stage a mixture is obtained which still has a noticeable content of hydrocarbons.