US1770181A - Process of treating hydrocarbons - Google Patents

Description

35 tion which may 15 longer periods of. time,

Patented July 8, 1930 UNITED STATES PATENT OFFICE- JAGQUE c. monnnnt, on cmcaeo, rumors, ASSIGNOB ro mum on. raonuc'rs COMPANY, OI CHICAGO, HILINOIS, A CORPORATION OF SOUTH DAKOTA PROCESS OF TREATING EYDROCABBONS Il'o Drawing. Application filed October 15, 1923, Serial No. 668,481. Renewed July 28, 1927- cracked residual (oils to eliminate the setv out ofmore or less of the coke formmg particles therein; Y With the advance made in the cracking of hydrocarbon Oils in the past few years,

there hasarisen an ever increasing problem in that some of: the residualoils withdrawn from the still or expansion chamber have a certain amount of coke forming substantially solid" particles suspended therein. These particles remain in suspensionfor short or but eventually settle out. For instance, a crtain'portion may settle in the run-down lines with a consequent slowing up of. the flow and eventual clogging upto the pipe. When used as fuel, the larger coke forming particles of the residual oil will eventually clog the'nozzle of the burner pipe. These coke forming or pitch-likeparticles are dispersed throughout an external phase consisting of relatively clear oil. The particlesin the internal phase vary in size but a greatmany of them, and especially the ag gregate, can be seen with a microscope. l have'discovered that'by sta'blizing the eiike forming particles in the oil, a state resembling emulsification exists, and the coke iori'ning particles remain suspended in the oil more or less permanently. This stabilization is produced as follows:

I subjectsome residual oils to homogenizabe accomplis'hdd by forcing the oil under high pressure through small minute apertures in order to obtain a finely divided dispersion, or the homogenization may be accomplished by subjecting the par- 40 ticles to mechanical impact which will tend' to break the substantially solid coke form- With some oils,

or the oil subjected to a strain ing particles,

to cause breaking of the larger particles into smaller particles in the usual colloid mill. it may be desirable to apply mogemzing heat before attempting to homogenize, as a semi-solid will homogenize more readily than a solid. In addition, it has been found that these particles or aggregates of the particles will assume a globular semi-solid form when subjected to heat. V

Homogenization of certain types of residual' oils will not stabilize the coke forming particles so as to secure a substantially .permanent suspension. I propose to add a stabilizing agent, usually of a colloid nature and soluble in the oil, for instance, soaps of the alkaline earth metals, such as calcium and magnesium oleate, stearate or resinate, to the oil. The mixture is then agitated for a period of time suflicient to make a substantially permanent suspension, the oil being in the external phase, and the coke forming particles in the internal phase.

The agitation may be accomplished by" the homogenization heretofore explained.

By treating the residual oils in the manner desbribed, it has been found that a relatively stable suspension is produced, resulting in a dispersion of the coke forming particles through the oils, which will remain sushomogenized, or the alkaline earth soap may be dissolved first'in a lighter oil such as gas oil, and'this solution added to the cracked residual oil so that the final proportions of the soap-in the oil is 01 to 2%. Y Y

I claimas my invention:

resulting from thesubjection of hydrocarbon oil to cracking conditions which comprises subjecting said residual oil containing suspended coke or pitch-like particles to a hoaction.

2. A stabilized liquid fuel obtained by sub- 1. A;process for stabilizing residual oils jectinga cracked residual oil containing free carbon in temporary suspension to a homogenizip'g action. 7

3. "A liquid fuel obtained by passing wresidual oil containing 'free carbon in temporary suspension between a. pair of closely contiguous surfaces under relatively e'xtreme- 1y high ressure.

4. A liquid fuel obtained by passing a residual-oil containing free earbon in tempoary suspension between closely adjacent surfaces under high pressnre v v JACQUE C. MQRRELL.