摘要:

The waste gases obtained during the pyrolysis, in baffled metal tubes, of 70:30 propane-butane mixtures at temperatures between 800° and 850 °C., with the object of producing liquid aromatics, have been used to produce carbon black in an experimental channel plant. The hydrocarbon mixture if utilized directly to produce carbon black yielded up to 4.9 lb. per 1,000 cu. ft. When the mixture was subjected to pyrolysis about 33 lb. of liquids (23 lb. in the gasoline range) was produced, while the off-gas yielded 5.4 lb. of carbon black. Yields of carbon black up to 10 lb. per 1000 cu. ft. were obtained with lower yields of liquid. Experiments on synthetic gas mixtures showed that the olefines were largely responsible for the production of carbon black from the pyrolysis off-gas. A large number of tests on rubber indicated that the carbon reinforces rubber in a manner as good as or better than that of the commercial gas blacks at present used in the rubber industry.

ISSN:1923-4287    

DOI:10.1139/cjr37b-017

出版商:NRC Research Press    

年代:1937

数据来源: NRC

摘要:

Monochromatic X-ray pin-hole diffraction photographs of two old specimens of "frozen" rubber are described. Histories of the specimens are given. Results are compared with existing data for "frozen" rubber and for fresh stretched rubber. Detailed figures for both conditions are thus made available and confirm the reported identity of their diffraction effects.

ISSN:1923-4287    

DOI:10.1139/cjr37b-018

出版商:NRC Research Press    

年代:1937

数据来源: NRC

摘要:

Corypalline, C11H15O2N, a new phenolic alkaloid fromCorydalis pallidaand from the seeds ofC.aurea, on methylation yielded the known 2-methyl-6:7-dimethoxy-tetrahydro-isoquinoline. On ethylation it yielded 2-methyl-6-methoxy-7-ethoxy-tetrahydro-isoquinoline identical with a specimen synthesized for purposes of comparison. Corypalline therefore is 2-methyl-6-methoxy-7-hydroxy-tetrahydro-isoquinoline, a synthesis of which was achieved.Oxidative fission of corlumidine O-ethyl ether yielded a base identical with a synthetic specimen of 1-hydroxy-2-methyl-6-methoxy-7-ethoxy-tetrahydro-isoquinoline. Treatment of the degradative as well as the synthetic base with alkali yielded the corresponding 1-keto-isoquinoline. Corlumidine therefore is 7-O-desmethyl-corlumine.Syntheses of 2-methyl-6-ethoxy-7-methoxy-tetrahydro-isoquinoline and the corresponding 1-keto-derivative are described.

ISSN:1923-4287    

DOI:10.1139/cjr37b-019

出版商:NRC Research Press    

年代:1937

数据来源: NRC

摘要:

The study of the pretreatment of wood has been continued. Wood-meal was heated in buffer solutions at constant temperature for periods of time up to 96 hr. This extreme pretreatment was found to cause the formation of a substance which is determined as lignin by the ordinary methods of analysis. It was found that wood, heated in a buffer solution at pH 3 for 36 hr. at 140 °C., could be completely delignified, though at a reduced rate of pulping. Jack pine is shown to give results similar to those obtained with spruce. A physical agglomeration of the lignin particles is proposed as an explanation of the results.

ISSN:1923-4287    

DOI:10.1139/cjr37b-020

出版商:NRC Research Press    

年代:1937

数据来源: NRC