US1823582A

US1823582A - Method of producing a slurry of lime in oil

Info

Publication number: US1823582A
Application number: US204435A
Authority: US
Inventors: Edward E Bartels
Original assignee: Standard Oil Co
Current assignee: Standard Oil Co
Priority date: 1927-07-09
Filing date: 1927-07-09
Publication date: 1931-09-15
Anticipated expiration: 1948-09-15

Description

Sept. E5, 1931. E. E. BARTELS 1,323,582

METHOD OF PRODUCING A SLURRY OF LIME IN OIL Filed July 9, 1927 @mail l I6 D 6 0 0 El u) llllllllllll-IIIIII sf '714155141441010 Y:

` Man Patented Sept. 1.5,

NETA@ EDWARD E. BARTELS, OF WHITING, INDIANA, ASSIGNGR T STANDARD OIL COMPANY,

0F "WRITING, INDIANA, A

CORPORATION 0F INDIANA Application. filed July 9,

This invention relates to a method of producing a slurry of lime in oil, particularly hydrocarbon oil which is to be subjected to distillation or cracking.

The present invention will be readily understood from the following description in conjunction with the accompanying drawing which shows diagrammatically a sectional elevation of a suitable apparatus for this purpose.

Referring to the drawing, is an open tank provided with a supplyand withdrawal line 11.` a perforated air pipe 12 in the lower po-rtion thereof, and a pipe 13 which extends from a point near the bottom of the tank to the suction side of a pump 14. From the pressure side of the pump 14, extends a pipe 15 which terminates in a nozzle 16 which is located in a collar 17 which carries a hopper 18. The bottom of the hopper 18 opens into the collar 17 at 19, adjacent the extremity of the nozzle 16. A pipe 20 extends from the collar 17 and terminates in an open end 21 in the upper part of the tank 10. This open end 21 is preferably provided with a strainer 22. The pipe 20 is so located with respect to the nozzle 16 that the oil emitted by said nozzle is projected into said pipe, drawing with it lime or other material which is supplied in the hopper 18. The pipes 15 and 20 are provided with valves 28 and 24 and are connected by a pipe 25, provided with a valve 26, to permit the nozzle 16 to be by-passed.-

ln operating the process, the tank 10 is filled, or largely filled, with oil which is circulated from the bottom of the tank 10 by pump 14 through pipes 13, 15, nozzle 16, and pipe 20, back to the tank 10. Powdered hydrated lime is dumped into the hopper 18 and is drawn into the stream of oil issuing from nozzle 16 and carried thereby into the tank 10. While operating in this manner. air is injected by the pipe 12 to keep the oil in a. state of agitation and prevent settling of the lime. T he. strainer 22 removes foreign bodies which may find their way into the lime. After the requisite quantity of lime has been supplied, a suitable quantity of water is supplied by pouring it into the hopper 18 and allo-wing it to be brought into the 1927. serial no. 204,435.

tank l0 by the circulation described. This addition of wat-er and the thorough admixture. thereof with the oil aids materially in the production of a relatively stable suspension of lime in the oil. While drawing o the oil for use, it is preferred to inject air through pipe 12 and to circulate the slurry by pump 14 through

lines

13, 15, 25 and 20, the valves 23 and 24 being closed and valve 26 being open.

Relatively large. quantities of lime and water may be incorporated in the oil, if desired. For example, thelime may be present tothe extent of up to 10% or higher and the water may suitably range between 0.25 and 10%.

The invention finds an important application in the addition of lime to hydrocarbon oil which is intended to be cracked in continuous pressure stills. In this use of the invention it is preferred to mix the desired amount of lime with a relatively small part of the hydrocarbon oil intended to be cracked under pressure to form gasoline or similar products, and to supply the limed portion to the main portion of the stock as it is being fed to the still.

The invention will be more readily understood from the following specific example:

The charging stock may suitably comprise, for exan'ip-le, gas oil, paraffin light ends, heavy pressure tar distillate, and naphtha hottoms,with or without heavy paraffin distillate. The lime may suitably be incorpovrated in a part of one constituent, for eX- ample., in a part of the heavy pressure tar distillate.

About 4,000 gallons of heavy pressure tar distillate are supplied to the tank 10 and the pump 14 started. About 7500 pounds of lime are supplied by the hopper 18 and are thoroughly mixed with the oil by the circulation thereof. Anout forty gallons of water are then supplied by the hopper '18 and thoroughly mixed with the slurry. About 1,000 gallons more oil are supplied to the tank, air being .supplied by pipe 12 to effect thorough admixture.

The concentration of lime in the slurry is thus approximatelyl pounds per gallon.

In order to add the requisite amount of lime to a stream of oil, it is necessary to pump the slurry into the stream at a definite rate. For example, Where it is desired to supply approximately 0.5 pounds of lime per barrel of oil to stills charging 80 barrels per hour, it is necessary to suppl a slurry of this composition at the rate oty about 27 gallons per hour. This Withdrawal of slurry may be w eected through pipe 11 by .a'pump (not shown). Y

Although the present invention 'has been described in connection with the" details of i a specific example thereoi it. is .not intended that such details shall be regarded as limitations upon the scope of the invention, except in so far as included in the accompanying claims. I claim:

1. The method of producing a slurry of lime in petroleum oil Without the necessity of introducing extraneous fatty acids into the oil which consists insupplying powdered hydrated lime to the oil and mixing it therewith, then supplying a relatively small quantity of Water thereto and agitating.

2. The method of producing a slurry of lime in petroleum oil which consists in circulating the oil in a confined stream from and back to a body of oil, gradually adding lime to the circulating stream of oil and then supplying Water to said oil.

3. The method of producing a slurry of lime in petroleum oil which consists in circulating oil from the bottom of a maintained body of oil to the top thereof, causing said oil to pass through a constricted nozzle during said circulation, supplying powdered hydrated lime to said circulating oil adjacent said nozzle whereby it is carried into said body of oil and distributed therethrough, and supplying a small amount of water to said circulating oil and causing it to be carried into said body of oil.

'4. The method of producing av slurry of lime in petroleum oil which consists in cyclically circulating oil in a confined stream from and back to a body of oil, gradually adding lime to the circulating stream of oil, and then supplying Water to said oil.

5. The method of producing a slurry of lime in petroleum oil which consists in cyclically circulating oil in a confined stream from and back to a body of oil, gradually adding lime to the circulating stream of oil, and then supplying Water to said circulating stream of oil.

6. The method of producing a slurry of lime in petroleum oil which consists in cyclically circulating a maintained body of oil through a restricted passageway provided with a constricted nozzle, supplying lime to"l sait passageway adjacent said nozzle Whereby lit =;is"m1Xed With the oil flowing through es Said restricted passageway, and supplying lll)