摘要:

AbstractThe phase behaviour of five distillation fractions of a Fischer‐Tropsch wax were investigated at pressures up to 40 kbar by means of differential thermal analysis. The approximate constancy in the number of significant components (i.e. greater than 5% by wt.) in each wax fraction is probably responsible for them appearing to behave as a series. Similarity of the phase diagrams of the individual wax fractions gave rise to the construction of a ‘master’ phase diagram. A possible new high‐pressure phase was detected in the heaviest fraction, but the possibility of phase separation cannot be e

ISSN:0021-8871    

DOI:10.1002/jctb.5010200101

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY

摘要:

AbstractMethyl and ethyl lactates have been synthesised under pressure from acetaldehyde, carbon monoxide and methyl or ethyl alcohol with various supported nickel, cobalt and iron catalysts. Under the optimum conditions, in the presence of nickel iodide supported on silica gel (Ni:SiO2= 50:50), the maximum yields of methyl lactate and by‐product lactic acid were 20.7% and 15.2% respectively, whereas the maximum yields of ethyl lactate and lactic acid were 12.6% and 12.3% respectively (all on the input acetaldehyde basis

ISSN:0021-8871    

DOI:10.1002/jctb.5010200102

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY

摘要:

AbstractThe mechanical behaviour of waterproofing membrane systems composed of one or more layers of bituminous sheeting fully bonded together to form an integral layer has been studied and a theory has been evolved which allows membrane stresses and strains to be calculated as a function of the mechanical properties of the constituent materials and of the associated substrate movement. Allowance is made for the visco‐elastic effects of bitumen.It is concluded that the ability of membranes to accommodate substrate movement largely depends on the mechanical properties of the base fabrics used to reinforce bituminous sheetings, and this has been confirmed in controlled experimental work.The order of substrate movement that may be tolerated by a single‐layer fully bonded system was calculated for a number of conditions. The improved mechanical performance afforded by partial bonding was considered to be worthwh

ISSN:0021-8871    

DOI:10.1002/jctb.5010200103

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY

摘要:

AbstractA modified form of an oscillating baffle column previously described by Thomas in which horizontal stator rings are introduced is studied. A theoretical technique is described for establishing true values for the number of transfer units for the continuous phase and disperse phase,NTUcandNTUd.

ISSN:0021-8871    

DOI:10.1002/jctb.5010200104

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010200105

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY

摘要:

AbstractA pressure‐differential system is described for controlling the flow of water between chambers of a waste‐heat still used to generate potable water from brackish water or sea wa

ISSN:0021-8871    

DOI:10.1002/jctb.5010200106

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY

摘要:

AbstractThe vapour pressures of six liquids have been measured in the approximate range 0.05 to 200 torr and correlated with that of benzene by a method published in an earlier paper. The relationship so obtained which is linear for non‐associated substances and is valid from critical conditions to a vapour pressure at least as low as 0.1 torr presents a reliable method of extrapolation of vapour pressure data. It may also be used (at vapour pressures below ˜ 100 torr) to evaluate the entropy and latent heat of vaporisation of a liquid from even scant vapour pressure da

ISSN:0021-8871    

DOI:10.1002/jctb.5010200107

出版商:John Wiley&Sons, Ltd    

年代:1970

数据来源: WILEY