158 



THE INDIA RUBBER WORLD 



[December 1, 1912. 



AMERICAN SYNTHETIC RUBBER PATENTS. 



IX view of the attention now being paid to the question of 

 •* synthetic rubber, interest attaches to a series of four Amer- 

 ican patents recently issued to Lucas Petron Kyriakides and 

 Richard Blair Earle, of Boston, Massachusetts The applications 

 had been made on November 11, 1911, and the patents were 

 granted on July 23, 1912. 

 The claims of the four patents are as follows : 



PROCESS OF PRODUCING PIPERYLENE. 



1. The process for producing piperylene, which consists in 

 passing the vapors of amylene oxid over heated dehydrating 

 catalytics at temperatures from 400''-500'' C, in vacuo, at pres- 

 sures less than 60 millimeters of mercury. 



2. The process for producing piperylene whicli cnnsists in pass- 

 ing the vapors of amylene oxid over heated aluminum silicate 

 at temperatures from 400°-S00° C, /// -lVcho, at pressures less 

 than ()0 millimeters of mercury. 



PROCESS OF PRODUCING ISOPRENE. 



1. The process for producing isoprene, which consists in pass- 

 ing the vapors of the valeraldehyde over dehydrating catalytics 

 at temperatures from 400° to 600° C, in vacuo, at pressures less 

 than 60 millimeters of mercury. 



2. The process for producing isoprene, which consists in pass- 

 ing the vapors of the valeraldehyde over aluminum silicate 

 at temiteratures from 400° to 600° C, in vacuo, at pressures less 

 than 60fmillimeters of mercury. 



t PROCESS OF PRODtrCING ERYTHRENE. 



1. The process for producing erythrene, which consists in 

 passing the vapors of normal butyraldehyde over heated dehy- 

 drating catalytics at temperatures ranging from S00°-600° C, in 

 vacuo, at pressures less than 60 millimeters of mercury. 



2. The process for producing erythrene, which consists in pass- 

 ing the vapors of normal butyraldehyde over heated aluminum 

 silicate at temperatures from 500°-600° C, in vacuo, at pressures 

 less than 60 millimeters of mercury. 



PROCESS FOR PRODUCING (3 y DIMETHYLBUTADIENE. 



1. The process for producing p y dimethylbutadiene, which 

 consists in passing the vapors of the hexylene oxid over 

 heated dehydrating catalytics at temperatures from 400°-S00° C. 

 in vacuo, at pressures less than 60 millimeters of mercury. 



2. The process for producing p y dimethylbutadiene, which 

 consists in passing the vapors of the hexylene oxid over 

 heated aluminum silicate at temperatures from 400° -500° C, in 

 vacuo, at pressures less than 60 millimeters of mercury. 



SYNTHETIC RUBBER FIGURES. 



In the "Ceylon Observer," D. U. Weigel, of Kollupitiya, ques- 

 tions the figures of yield put forward in the prospectus of the 

 synthetic rubber promoters. These yields, it is recalled, were 

 stated as follows : 



1. Starch from potatoes 60 per cent. 



2. Fusel oil from starch 43 per cent. 



3. Isoprene and rubber from fusel oil. .50 per cent. 



The first figure he characterizes as "utter nonsense" the maxi- 

 mum yield being 24 per cent., and the average 17 per Cent.; 

 adding that there had apparently been some confusion with the 

 55 per cent, yield from maize. 



As to the alleged 43 per cent, of fusel oil from starch, Mr. 

 Weigel remarks that the bacteria which influence butylic fer- 

 mentation are known, but he has never found any authority to 

 attribute to any of them the power of activity up to a 43 per 

 cent, yield. 



This discussion of the question of yield from a scientific 

 point of view, at such an important point as Ceylon, indicates the 

 widespread interest which the subject of synthetic rubber has 

 aroused throughout the world. 



FAREWELL DINNER TO MR. MANDERS. 



A M().\'(; tiK- many farewell luncheons and dinners tendered A. 

 •'^ Staines Manders prior to his departure to Europe, one. of 

 the most notable was the dinner at the Lotos Cliib on the even- 

 ing of November 12. There were present only men identified 

 with the rubber trade. Informal speeches were made by Arthur 

 W. Stedman, J. O. Stokes and George B. Hodgman. In behalf 

 of friends of Mr. Manders in the rubber trade, H. C. Pearson 

 presented a beautiful loving cup. Mr. Manders, in accepting it, 

 paid a high tribute to .\merican enterprise as evidenced by the 

 prosperous rubber industry. 



The cut below shows the cup on an ebony standard. The 

 cup alone stood about 12 inches high and was etched on its face 

 with a decorative design of rubber leaves framing the following 

 inscription; Presented to 



.-X. Staines M.\nders 

 Organizing Manager 

 and 

 Miss D. Fulton 

 Secretary 

 Of the 

 - Third International Rubber 

 And Allied Trades E.xposition 

 New York, 1912 

 By Their Friends 

 Of the 

 .American Rubber Trade. 

 Mr. IManders was greatly pleased with this token of regard 

 from his .American friends, and though he received a number 



of other souvenirs of his six months' stay in the United States, ■ 

 be probably received none that he will treasure more highly. 



