ISSN:0021-8871    

DOI:10.1002/jctb.5010160101

出版商:John Wiley&Sons, Ltd    

年代:1966

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010160102

出版商:John Wiley&Sons, Ltd    

年代:1966

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010160103

出版商:John Wiley&Sons, Ltd    

年代:1966

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010160104

出版商:John Wiley&Sons, Ltd    

年代:1966

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010160105

出版商:John Wiley&Sons, Ltd    

年代:1966

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010160106

出版商:John Wiley&Sons, Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractAn experimental investigation is presented of the flotation of dichromate ion using a cationic surfactant, ethylhexadecyldimethylammonium (EHDA) bromide. Dichromate ion forms a colloidal complex with EHDA ion in a molar ratio of 1 : 2, which may be efficiently floated from solution and concentrated in a stable foam produced by excess surfactant. Batch experiments with feed solutions containing 5–100 mg/l of dichromate ion produced residual dichromate concentrations ranging from 0.004 to 0.198 of that of the feed, depending upon the concentration of surfactant in the feed. The effects of pH and of possible interfering anions were determined. Continuous experiments indicated the reduction of dichromate from 50 to 15 mg/l, producing a foam stream containing 450 mg/l of dichromate. The influence of retention time is discusse

ISSN:0021-8871    

DOI:10.1002/jctb.5010160107

出版商:John Wiley&Sons, Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractThe high‐pressure synthesis of n‐propyl acrylate from acetylene, carbon monoxide and n‐propanol has been studied in detail. Nickel iodide–silica gel (Ni : SiO2= 50 : 50) and nickel acetate–silica gel (Ni : SiO2= 50 : 50) were the most active catalysts (yields 58.78%, 55.54% respectively on acetylene input basis). Besides n‐propyl acrylate, the reaction product contains acrylic acid, acetaldehyde, liquid hydrocarbons, carbon dioxide, hydrogen, ethylene and other unsaturated h

ISSN:0021-8871    

DOI:10.1002/jctb.5010160108

出版商:John Wiley&Sons, Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractA rapid, detailed assay, based largely on both liquid and gas chromatography, was developed for low‐temperature coal tars. With the use of this assay, the pounds per ton of coal of various compounds of commercial interest could be determined, thus supplying the information needed for an economic evaluation of the tars and the carbonisation processes. The amounts of about 100 individual compounds of several classes were involved, including light oil components, tar acids and bases, and neutral‐oil components such as naphthalenes and straight‐chain paraffins and olefins, and the total amounts of these classes in the entire tar. The results for six different tars from the same coal were chosen as exa

ISSN:0021-8871    

DOI:10.1002/jctb.5010160109

出版商:John Wiley&Sons, Ltd    

年代:1966

数据来源: WILEY

摘要:

AbstractThe structure of cellulose acetate membranes used for desalination in the process of reverse osmosis has been examined. By means of a technique involving aqueous solutions of the stain Biebrich Scarlet, the membranes are shown to consist of two regions, one of which acts as a mechanical support for the much thinner desalinating layer. The phenomenon of asymmetric permeation across these membranes has been studied and shown to be a consequence of the two‐layer structure of the membran

ISSN:0021-8871    

DOI:10.1002/jctb.5010160110

出版商:John Wiley&Sons, Ltd    

年代:1966

数据来源: WILEY