US1843151A - Process of cracking oil - Google Patents

Description

Feb. 2, EGLQFF 1,843,151

PROCESS OF CRACKING OIL Filed June 26, 1925 a??? M fi Y 1,;

Patented Feh.2, 1932 t 3 UNITE stares" PATENT-I OFFICE eusravnenorr, on cnrcaeo, ILLINOIS; assreivon ro UNIVERSAL oIL Paonucrs com- QANY; or cmoaeojrnrmors, A conrona'rron or source: mxora v or cnacxme on "Application m 2a, 1926. Serial no. 118,828.

' This inventionrelates-to.improvementsin' 1 a'..-iiree .ss r cking "hi an e particularly to the treatmentof pressure distillate as part'of a continuous.crackingiproc- :fij ess. 3 s

' The object of the invention is to treat the pressure distillate as it comes from the top of'the dephlegmator so as to decolorize and deodorize the pressure distillate, and-make a finished motor fuel,-as-for example, havjingan end point corresponding to gasoline. The invention will beunderstoodfrom the following description, reference being had to the accompanying drawing in which the single figure is a side elevational view illustrating the apparatus.

Referring to the drawing, 1 designates a furnace-in which is mounted the heating coil 2., The transfer line 3 having'valve 4;, leads tooneendlof the expansion chamber 5. This expansion chamber: 5, which is preferably lo cated' outside of the fire zone, as residue drawofi fifcontrolled by the valve '7 and vapor outlet pipe 8 extending into the lower-.end of the dephlegmator 9 as shown. This de hle'gmator9hasthereflux condensate drawo pipe 10v havingvalve 11, and may be provided with hot oil pump 12 leading to the main feed line 13. The feed line 13-may be'supplied with raw oil through the pump 14 leading to any suitable source of supply. The vapors pass out of the top of the dephlegmator through the pipe 15 controlled by the valve- 16. Instead however, of passing directly to the water condenser, or to another fractionating tower as is the casein the cracking processes now in use, I pass the hot vapors from the top of the dephlegmator through a filter press 17, which filter press may be of the conventional type, using layers of filtering 7 material such as fullers earth, diatomaceous earth or the like. If desired, a hot vapor pump 18 may be interposed in the line 15 so as to put the filter press under a higher ressure than the balance of the system. owever, the pum may be by-passedin an obvious manner, i desired. As the vapors pass 1 through the filter press, they are decolorize'd and deodorized.

g9 They then pass either directly to the water condenser and receiver, or if desired, may pass through the line 19 having the valve 20,

a fractionatin'g tower 22 having liquid draw- Off 23 controlled by the valve 24am vapor outlet pipe 25 controlled by the valve 26 leading to the water condenser 27 and thence to the receiver 628. This receiver 28 maybe equipped'with gas outlet pipe 29 controlled by the valve 30, liquid drawofi pipe'3'1 corito astill 21, which still 21 equipped with trolled by the valve 32'. The still may have residue drawofi 33 cont-rolled by the valve'34.

By suitably regulating the valve 20, the pressure on the vapors or oil as they enter the still may be substantially reduced, thus causing the oil to flash, and the lightest or having an end point corresponding to gasoline portions thereof pass through the tower into the receiver. If desired, the still, 21

may be externally heated as the filter press might in some cases be cooled, andthe oil comes from the filter press in more or less liquid condition. f If desired, the vapors from the dephlegmator may be cooled to liquid form beforethey enter the filter press.

The arrangement is such that the entire sys tem may be maintained under uniform pressure of say 200 pounds, or the filter press may be maintained under higher pressure than the preceding part of the apparatus, as for example,-800 pounds, and the gasoline still may be maintained under a pressure of 50- pounds or atmospheric. I claim as my invention: A

1. -A method for refining the vaporous h drocarbon mixture issuing from an .oilcraching process which comprises dephlegmating said mixture and condensing therefrom fractions heavier than-gasoline while retaining the gasoline hydrocarbons in vapor form, in creasing the pressure on said gasoline hydrocarbons and passing the same under the increased pressure through a decolorizing and deodorizing filtering agent.

2. A method for refining the vaporous hydrocarbon mixture issuing from an oil cracking process which comprises dephlegmating said mixture and condensing therefrom fractions heavier than gasoline while retaining the gasoline hydrocarbons in vapor form,

pass the line va is under ressure throl l gi a dec fii izing alllldeodo'rizil g filtering agent, cooling t e 'vapors during their passage through said agent thereby render- 5 ing the same more or less liquid passin the liquid to a' distillation zone mamtaine un-t der lower pressure than the filtering stage whereby distillation therein is facilitated by I the pressure reduction, and condensing the vapors evolved in said distillation zone.

' GUSTAV EGLOFF.

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