摘要:

AbstractWith the help of pH curves, conditions have been found for the formation of basic double chromates of general formula R2CrO43MCrO4,M(OH)2,2H2O, where R is Na, K or NH4and M is Zn or Cd. No NaCd compound was encountered, and the NH,Zn compound was of a different type. The decomposition of these compounds by alkali and by copious leaching with hot and cold water (KZn and KCd only) into basic zinc and cadmium compounds has been studied. Cadmium chromate and the monoxychromates of zinc and cadmium have been prepared. The identity of each compound has been characterized by equation of formation, composition,X‐ray diffraction pattern and solubility. Many of these compounds are of commercial importance as paint pigments. The NaZn, KZn, KCd and NH,Cd compounds have been prepare

ISSN:0021-8871    

DOI:10.1002/jctb.5010050401

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractThe equilibrium‐phase relationships for the quinary system sucrose–glucose–fructose–potassium chloride–water have been determined at 30°, and are illustrated on a triangular diagram.Solutions saturated with glucose and potassium chloride are nearly always in equilibrium with anhydrous glucose. A small range of compositions is shown for which glucose is stable as the monohydrate, and a smaller range of intermediate compositions for which the anhydrous glucose is in a metastable condition with a tendency to form the monohydrate. No double‐compound formation was observed. The solution of highest concentration of total solids was not at the quinary point and, in this respect, resembled the quaternary system sucrose–fructose–potassium chloride–water. A line is drawn round the quinary point which marks the limit of increasing solute concentration. The quinary point has the percentage composition sucrose 18°0, fructose 44.6, glucose 11.7, potassium chloride

ISSN:0021-8871    

DOI:10.1002/jctb.5010050402

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractFactors bearing on the selection of priming paints are first discussed. Then interim results of collaborative researches by Joint Technical Panel J/P1 of the Protective Coatings (Corrosion) Sub‐Committee, of the British Iron and Steel Research Association, and the British paint industry are presented. For weathered steel, priming paints in a linseed‐oil medium have proved better than those in all other media tested, and one pigmented with a mixture of red lead, white lead and asbestine is recommended. Good results have also been obtained from priming paints pigmented with aluminium powder, basic lead sulphate or zinc oxide, with or without asbestine, in an alkyd medium and by pigmented paints derived from blends of the natural bitumen, Gilsonite, and various drying o

ISSN:0021-8871    

DOI:10.1002/jctb.5010050403

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractStorage tests have been carried out on the effect of pyrogallol in very small concentration as an inhibitor of peroxide formation in solvent ether B.P.The inhibiting effect was adequate over a period of two years even in concentrations so small (0.0001 g./100 ml.) as to permit the normal use of ether as a solvent.

ISSN:0021-8871    

DOI:10.1002/jctb.5010050404

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

摘要:

AbstractA new study has been made of the manufacture of a textile fibre from groundnut protein. This includes a series of ultracentrifuge examinations of the protein at each stage of the process from the groundnut meal to the coagulated fibre. It was seen that little change in the protein occurred until its reaction with sodium hydroxide gave a spinning solution. An accompanying study was made of the protein, caustic soda and water solutions used for extrusion, observing the rheological changes which occur with change of composition and relating these to the parallel ultracentrifuge examination.

ISSN:0021-8871    

DOI:10.1002/jctb.5010050405

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY

ISSN:0021-8871    

DOI:10.1002/jctb.5010050406

出版商:John Wiley&Sons, Ltd    

年代:1955

数据来源: WILEY