DE765305C - - Google Patents

Description

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Catalyst for catalytic. Cleavage «* dehydration of hydrogen and hydrogen.

For the catalytic cleavage and dehydrogenation of hydrocarbons, catalysts are used in technology, which preferably consist of metals, their oxides, chlorides, fluorides or sulfides, for example aluminum, chromium, cobalt, copper, iron, manganese, molybdenum, nickel and zinc. For the cleavage and dehydrogenation alj catalysts also alloys of nickel and Ciiroin or,? and aluminum are suggested. A number of catalysts are produced by precipitation from the solutions of the abovementioned metals with simultaneous application to supports such as kieselguhr or clay. The production of metallic catalysts, as well as the resulting losses during regeneration and the like, make the use of these catalysts by melting the metals (kisch catalysts) or precipitating the metals from their salt solutions with the following: drying, shaping and reducing complicated and expensive. Lan hex has also already proposed to use blast furnace slag as a catalyst, as is normally the case. Such a catalyst is brought without any special treatment in a basket and with this in 2u gap end u \ MRFC he $ etaucht. Bas goal is _;

a low yield of gasoline, mainly heating oil to win, which has a lower viscosity compared to the starting material.

Another ^ * suggestion is in treatment of rnnprtirni space and the like by hydrogenation and increased amount of gas oil and valuable lubricating oils to use catalysts from a slag when refining is obtained from iron alloys. The slag firtfet likewise without further treatment, for which application to "enlarge their surface and more active effect, they are introduced directly from the furnace into water.

It has now been found that the slag from the

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¹ of high iron ₍ which contain the oxides of aluminum, manganese, and iron in addition to the oxides of potassium, sodium, calcium, magnesium, and silicon, as well as a small amount of bound sulfur in finely divided form, in granular form as catalysts for splitting and dehydration This applies in particular, for example, to the acidic to acidic slags with SiOp: CaO ratio of about 1: 0.4 to 1: 0.8. According to the invention, the slag obtained is treated with inorganic acids or halogens and then subsequently * be * heating ^^^ dried wasaerdampf. An ao treated blast furnace slag experiences as a catalyst in its activity, "~ ' ⁿ i ° considerable increase, the more selective 7 / ir £ .ung is aα understand that.jA-4T§! ch' the type of treatment of the ochlacke ^ üj ^ ste- ^ STs Spaltkatalyaator ^

or dehydrogenation catalyst can be used in these fields of application

by the type of external treatment and the duration of the

In turn, the activity of the catalyst varies reach. It is therefore possible, for example, for the dehydrogenation of a substance consisting essentially of butane Mixture to produce a particularly suitable catalyst that the action of the chlorine for longer than 1 hour, preferably 2 to 3 hours, while for a propane-ßutane-G-emiseh the action of the Chlorine already gives a satisfactory yield from 1 hour.

Embodiments:

1. 1000 Si over- acidic blast furnace slag was mixed with 200 cnr concentrated hydrochloric acid of spec. Weight 1.14, to which about 5 ohromyl chloride was added, heated at 50 ° j / for one hour, then the slag treated in this way was filtered off, dried and treated with steam at 450 ° ί to remove the acid residues.

A gas oil with 0.865 spec. Boiling weight between 195 ° and 360 k was passed at 470 Qf and a pressure of 2.5 kg / cm in the Jkenge of 100 cm / min over 1000 gI -e catalyst. A yield of 75 wt. The contact was regenerated after 310 l of gas oil had been passed over it.

2. The same gas oil was passed at a temperature of 495 ° f and a pressure of 2.5 kg / cm at the same throughput rate over 1C00 pb.b of untreated slag. In this case, the yield of mineral spirits fell to 65 Qew.fo. The octane number fell to 59 The carbon deposition on the slag made the disruption of the

3. 1000 gr oschiaclce were treated for one hour at about 100 pounds in a stream of chlorine and then at 350 pounds in steam.

A free of olefins mixture consisting of 45 ⁰ A propane and 55 f »butane was passed at 45O ⁰ J ^ with a throughput rate of 10 l / min for 500 gr of the aforementioned catalyst. After a single run, were

Get $ 32 olefins. After taking out $ 20 of the educated

/ Olefins through polymerization were converted into olefins by passing the remaining mixture over again 60 i » de3 propane-butane mixture,

Claim

Claims (1)

Claim: Catalyst for the catalytic cleavage and dehydrogenation of hydrocarbons, characterized in that it consists of Slag that consists of pig iron with inorganic Treated acids or halogens and then Heat n- ^ Waaserdaapf are dried To distinguish the subject of the application from the state of the art are in the granting procedure following publications *) been considered. ^^^^ Ki ff /? j foosi * nt rs / Delete where applicable