US1590656A - System oe teeating - Google Patents

Description

Patented June 29, 1926.

. UNITED STATES HARRY P. TABER, OF WILMINGTON, DELAWARE.

SYSTEM on reafirma on..

Application filed August 19, 1921.

This invention relates to an improved means for and method of treating oil, and more particularly to the treatment of such oils as linseed and China wood, and other sovcalled drying or semi-drying oils.

In the making of varnishes, printing inks or other substances which have for their base Y or part of their makeup, linseed, China wood, poppy seed, or' any of the so-called drying or semi-drying oils, it has been the practice, and often necessary, to body or thicken these oilsV by oxidation, such as by blowing with air, boiling, or by applied mechanical means. Often in systems as heretofore conducted, lack of attentionover heating, under-development, or other causes have resulted, in an unsatisfactory product which in many instances has been a spoiled product. In the case of China wood oil particularly, when the same is subjected to a temperature which is'too high, or brought to a lower temperature but for too long a time, it polymerizes, and the batch of oil is thus ruined for varnish purposes.

One object of my present invention is to obviate the difficulties and defects in the treatment of oils to body the same as'heretofore practiced, and" to so treat the oil that the element of danger shall be reduced to a negligible quantity, and to insure the obtaining of a product which shall be uniform throughout.

A further object isV to so treat oil of the charactersspeciiied that a continual flow of oil may be had, and so that every part of the oil shall, during such flow, be subjected to air and also brought to a temperature previously decided upon and for any length of time which may be found necessary for the proper bodying or thickening of the oil.

With these and other objects in view, the

Y invention consists in certain features as hereinafter set forth and pointed out in the claims.

In the accompanying drawings, which show an embodiment of an apparatus with which my invention may be carried into effect; Figure 1 is a sectional view; Figure 2 is a perspective view of the tank, and Figure 3 is a perspective view of a plurality of dividing partitions and means for supporting the same.

1 represents an elongated tank which may be made of suitable metal and disposed over a source of heat. Such source of heat may Serial Np. 493,604.

be a heated oil bath as indicated at 2, vand the oil of thisfbath may be heated by any suitable gas heater 2'al or electric or other heater, or the tank may be heatedl directly with the use of such heater located underV said tank.

In the embodiment of the invention shown in the drawings, the tank l is dividedV by a plurality of partitions 3, 4, 5, 6, which extend `upwardly from the bottom of the tank and terminate at their upper edges be low the plane of the open top of the tank.

The upright partitions are so disposed as to form chambers or compartments 7, 8, 9, l0, 11,-the two end'chambers or 'compartments 7 andV ll being each one-half the width of the-others.

A frame consisting of parallel bars 12 are disposed over the tank and may rest freely' The frame bars on .the ends of the latter. 12 have secured to them, the upper edges of partitions 13, 14, 15 which depend into the chambers 8, 9, 10 and dividel said chambers into chambers of the same size Vas the end chambers 7 and 11.k The partitions 13, 14, 15 are suiiicientin length to extend from one side wall to the other of the tank and are ofsuch depthy as to terminate labove the bottom of the tank, thus permitting the chambers at respective sides of each partition 13, 14, 15 to communicate with each Vother at the bottom of the tank.

Oil from a suitable supply, indicated at 16, is provided to discharge in the lirst com-` partment 7 and a discharge outlet 17 is provided to receive treated oil from the last compartment 11 and deliver it to a suitable container or to a condenser or other suitable device to effect rapid cooling.

It isevident that oil discharged into the first compartment must, in order to reach the partition 3 and enter the next compartment, from which it will pass, under the partition 13, to the next compartment'and after filling the lat-ter it will overflow the rportion d and enter the next c ompartinent,

bottom of the tank and exposed to the.

atmosphere to effect oxidation; kIt is apparent that in the flow of the oil through the apparatus, every part of itf-must come in Contact Vwitlrthe heated bottoni of the tank when it flows under the depending partitions lf3-l5, and it is also evident that every part of the oil must be exposed to the air as it flows over the partitionsMS-(. The alternate contact with heat and .Y air brings about a more rapid VandA efficient oxidation or bodying of the oil than when o il is treated' by the methods heretofore employed, and gives a uniformity of treat ment which has not heretofore been accomplished, so far as I ain aware.V

The rate of flow of the oil may be regulated as previously stated and it is eyident that the temperature at which the il is to be treated may be regulated by controlling, by any suitable means, the heat source. lith the use of my improved system, the oil maybe heated lfrom 350 to 600? F.

Itis evident that when the proper degree of heat *for the .particular bath of oiltobe treated, has been Vdetermined and obtained; the length of time the oil should be treated has been determined, and the rate of flow adjusted, it is possible to obtain acontinuous flow of heat-treated oil from the apparatus. For example, let it be assuined that the supply tank when filled and ready to iiow, contains one gallon of oil, and that it isvdesired to bring the oil to a temperature of 20() degrees for ten minutes. The heat will be adjusted to 200 degrees, the rate of flow so set that one gallon will fiow through the apparatus in ten minutes (this gallon representing the cubic contents of the treating tank) and if the supply tanl; is allowedto furnish a continuous stream ,of oil, lthere' will be also a continuous stream of heattreated oil flowing from the outlet of the treating tank, and every part of the oil will havek been brought in alternate Contact with air and with heat for the period decided upon and at the temperature desired. As di'iierent oils and different batches of the samev type of oil may require different ters Patents, is 2- v l. The method of treating drying oils which consists in establishing a continuous gravity flow of an undivided 'body of oil and subjecting the flowing body of oil alternately to the action of heat and air.

2. The method of treating 4drying' `oils which consists in establishing a continuous gravity flow of an undivided body of oil, repeatedly subjecting the flowing body of oil to the action of heat, and subjecting the flowingbody of oil to the action of air after each heat treatment.

3. The method of treating drying oils which consists in establishing a continuous gravity flowvof an undivided body of oil over a path extending kalternately downe wardly and upwardly, and subjecting the flowing body of oil to the action of heat at the low points of its path and to theV action of atmospheric air at the high points of its path. l

t. The method of treating drying oils which consists in causing an undivided bodyiof oil to flow continuously by gravity alternately contact with and away` from a heated surface, and exposing the body of oil to the action of atmospheric air in the intervals when it isawvay'fro/m the heatedV surface. f

In testimony whereof, have signed this specification.

HARRY i?. TABER.

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