摘要:

Preparation of methanol lignin by the method of Brauns and Hibbert on a larger scale than that employed previously has disclosed the presence of a second fraction, soluble in ether-dioxane. The original methanol lignin and this new fraction are obtained in a pure state by fractionation with dioxane and benzene. The former has been shown to correspond to the methanol lignin from which the Brauns and Hibbert formula C42H32O6(OCH3)6(OH)4was derived. The benzene-dioxane–soluble fraction has been methylated and acetylated, and shown to have a different composition, the ratio of methoxyl to hydroxyl groups being 5:3.

ISSN:1923-4287    

DOI:10.1139/cjr36b-016

出版商:NRC Research Press    

年代:1936

数据来源: NRC

摘要:

A new type of solubility apparatus is described. The results of the solubility determinations of carbon dioxide at 15 °C. are given for the following systems: alcohol-water, dextrose-water, levulose-water, sucrose-water, dextrose-alcohol-water and sucrose-alcohol-water. Certain incidental measurements of specific gravity and of vapor tension are also given.

ISSN:1923-4287    

DOI:10.1139/cjr36b-017

出版商:NRC Research Press    

年代:1936

数据来源: NRC

摘要:

The production of carbon black in an experimental plant of the channel type is described. Carbon black has been produced from Turner Valley dry gas in yields as high as 1.3 lb. per 1000 cu. ft. The rubber reinforcing properties, methylene blue sorption, and per cent extractable are similar to those of the commercial carbon blacks available at present. The presence of hydrogen sulphide in the gas has been examined, but little effect on yields and properties was noticed with concentrations as high as 1% by volume.

ISSN:1923-4287    

DOI:10.1139/cjr36b-018

出版商:NRC Research Press    

年代:1936

数据来源: NRC