Tulsa daily world. [volume] (Tulsa, Indian Territory [Okla.]) 1905-1919, 1917-02-04

y sos. such as for airplaluos and SO
on, ana should include products Of
tho type now sold In the eastern mar
Fct ns of 10 degrees Baume or over.
Tho middle grade is 20 be used for
motor ears of design of snv. two
years ago, and is represented 10y tho
type of gasoline now sold I'm thc-cJs,-
crn market which ranges from 90 10
90 degrees Baume. The third grade.
rcptoaentcd 10y the gasoline now sold
iu the eastern market Hs around 80
Der cent Baumo gravity. IS used sat
isftctorlly th up-to-date motor car
engines. II Is realized that the motor
ear engine has been improved - that
II can use a heavier grade of fuci
then was possible q few years ago.
There are AT present on the mar
Rot types OF gasolines produced by
several general refining methods.
These may he classified as follows.
y. 'Strui sht refinery gasoline.
"2. Blended casinghead gasoline.
'3. Cracked and blended gasoline
Straight refinery Fasoincs are
produced 10y methods which vary
somewhat I'm different parts of the
country but are in general slmla.
Crude OIL is distilled IN fire sim ana
"a cut made when the gravity
reaches some predetermined mark.
The sO-CallCd crude nnphtha or
bcnzine is acid refined ana then
steam distilled. In some cases sov-
cral products of different ranges Of
volatility are produced, in others the
steam instillatiun simply effects Il sep
aration from less volatile bottoms
which go into the burning oil stock.
Straight refinery gasuines are
characterized by low content of un-
saturated ana aromatic hydrocarbons
and 10y "A distillation range which is
free from marked irregularities.
"Casinghead gasoline is q product
hich has come on the market during
the last few years and Is produced
from wet natural gas by processes
of compression or absorption.
straight caslnghead gasoline is too
Nolatile for general use an before he
ing PIT on the market is blended with
sufficient proportion of heavy naph-
tha to produce a mixture which is
both safe for use and moderately
chcap. Blended casinghcad mod
cratcly cheap. Blended casmghcad
g1solincs are generally characterized
by volatility range showing consid-
erahlc precentaEes Of constituents
boiling at both low and hiph temper
atlre, bat a deficiency of ntcrmtdi-
ate products Is done in such manner
that ii - difficult to detect the natural
gae gasoline. This is when il IL used
in moderately small proportion to
l"ht"n ana 90 make volatile gasoline
which has q boiling range ap-
proNimatcly the same as that Sdtis-
factory for motor purposes.
AS far as chemical properties are
concerned. casirEheld gasoline seems
to hc ienticll with the straight re
fincry product. The characteristic
properties are. therefore, wholly due
to tho details Of blending.
zone Gf the important factors in
the pre- ent gasoline market is the
production OF cracked or synthetic
casolincs. These are being marketed
in enormous quQantities, largelv, If
not altogether. i'm the form Of blends
with straight refinery and casing
head gasoline.
Cracked gasolnes are similar in
physical properties to straight re
flncry products, bat are different
chemically in that they contain Narv-
ing percentages of unsaturated and
aromatic constituents. IL has been
demonstrated that these constituents
do rot decrease the value of gasO-
line # they are not present in too
great proportion. II is still an open
question whether motor fuel contain
Ing very high percentages of unsatu-
rated compounds can be utilized IN
the same way as the Straight re-
fmery pI oluCts.
Attention is also called to the
fact that refiners are today market
Ing gasoline containing considerable
pen lccntageS of unSaturatcd compound
and these products are being satis-
tactoiily used by the public. Dallas
NcNS