Crude residua can be thermally cracked to more valuable products by using a reaction diluent such as Tetralin, which gives up hydrogen to cracked residua. The Tetralin is dehydrogenated to naphthalene, and the residua are converted into lower boiling products with little coke and dry gas.

The practical advantages offered by premixed plasticizer-filler preparations in the proportions determined are:1. A considerable saving in milling time over the practice of separate incorporation and consequently an increase in output of finished goods without enlargement of mixing facilities 2. Lower heat development in the milling process 3. Lower and even power consumption in the milling process 4. Easier handling 5. Cleaner working conditions 6. Elimination of the necessity for the compounder to choose plasticizers as to their handling instead of as to their performance in the compound 7. Elimination of containers for shipping and handling liquid plasticizers. ACKNOWLEDGMENTRichard Weil of the rubber laboratory of Wilmington Chemical Corporation was most helpful with supervising the testing of rubber compounds. This valuable cooperation is great fully acknowledged. LITERATURE CITED(1)

No. 2 composition is considerable. Only at approximately 3663 E". for the component n-tetradecane are all values the same for all compositions, The greatest percentage deviations from mean values for n-tetradecane and 1-hexadecene are found a t the lower extremities of the logarithm K-temperature curves where the naphthalene content of the system is greater. Deviations up to 15% are observed for 1-hexadecene in this region. In compari-Eon, the curves for naphthalene show greater deviations where the n-tetradecane and 1-hexadecene percentages are greater. Such conclusions would be expected because of the widely differing structure of the aromatic naphthalene as comliared to the paraffin and olefin.In general, it can be concluded that at a pressure of 200 mm. of mercury absolute:The presence of naphthalene in a n-tetradecane-I -1iesadecene so1ut)ion increases the value of the equilibrium constant for 1-hexadecene.The presence of naphthalene in a n-tetradecane-l-hesadecene solution below 366" F. increases the value of the equilibrium constant for n-tetradecane; above 366" F. the opposite is true.3, The presence of n-tetradecane in a naphthalene-l-hexadecene solution increases the equilibrium constant value for naphthalene, 1. 2.Comparisons with the Van Winkle generalized chart, (16) for solut,ions of higher niolecular weight paraffins and olefins (Table I X ) show fairly close agreement at higher temperature values. St lower temperatures, n-here the naphthalene content of the mixture is greater, generalized percentage deviations from the mean values obtained in this work are a t a maximum. In general, the deviations indicate that naphthalene affects the generalized equilibrium constants for n-tetradecane and 1hexadecene according t,o the prior conclusions 1 anti 2. h-OMENCL4TURE A = empirical eonstant B = empirical constant b Clo = naphthalene Clr = n-tetradecane Cie = 1-hexadecrne K k P = vapor piessure P r = total pressure = constant in Li and Coull correlation = equilibrium conetant in terms of concentration = constant in Li and Coull correlation 2 ' = absolute temperature 5 = mole fraction in liquid phase y = mole fraction in vapor phase y = activity coefficient Subscripts 1 = naphthalene 2 = n-tetradecane 3 = 1-hexadecene LITERATURE CITED(1) Carlson, €3. C., and Colburn,

THE accelerated development of the carbon monoxide hydrogenation process for the production of gasoline during the years immediately following World War II, will have, perhaps in

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