Chemical News and Journal of Industrial Science, Tomy 125-126Chemical news office., 1923 |
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Strona 2
... quantities of other by - products . ( d ) Availability of starting materials . From consideration of the general methods by which thiazoles have been prepared , the following proposed syntheses are obvious at once : ( a ) Condensation ...
... quantities of other by - products . ( d ) Availability of starting materials . From consideration of the general methods by which thiazoles have been prepared , the following proposed syntheses are obvious at once : ( a ) Condensation ...
Strona 3
... quantities of chromyl chloride were . prepared by the method of Law and Per- kin , and paranitrobenzaldehyde by that of V. V. Richter . 76 75 Molecular quantities of the two sub- stances , paratoluidin and paranitrobenzal- dehyde , are ...
... quantities of chromyl chloride were . prepared by the method of Law and Per- kin , and paranitrobenzaldehyde by that of V. V. Richter . 76 75 Molecular quantities of the two sub- stances , paratoluidin and paranitrobenzal- dehyde , are ...
Strona 4
... quantities , it might be worth while to investigate the reactions fur- ther , but as for the preparation of dehydro- thiotoluidin , these experiments failed , this was not done . 77. Gatterman and Neuberg , Berichte , 25 , 1081 ( 1892 ) ...
... quantities , it might be worth while to investigate the reactions fur- ther , but as for the preparation of dehydro- thiotoluidin , these experiments failed , this was not done . 77. Gatterman and Neuberg , Berichte , 25 , 1081 ( 1892 ) ...
Strona 5
... quantities by all of the known methods , and unsuccessfully trying to develop a new one , it was finally con- cluded that the Kalle method offered the only possibility , and purification must be accomplished by vacuum distillation . Pre ...
... quantities by all of the known methods , and unsuccessfully trying to develop a new one , it was finally con- cluded that the Kalle method offered the only possibility , and purification must be accomplished by vacuum distillation . Pre ...
Strona 20
... quantities of the other substances , were heated according to the directions . The reaction mixture turned red at once , and a reddish , oily tar formed on the surface as the reaction proceeded , a yel- 78. Döbner and Giesiecke , Ann ...
... quantities of the other substances , were heated according to the directions . The reaction mixture turned red at once , and a reddish , oily tar formed on the surface as the reaction proceeded , a yel- 78. Döbner and Giesiecke , Ann ...
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acid action added amount ANALYTICAL BALANCE appears application atoms British carbon carried cent Chem Chemical Chemistry chloride colloidal colour complete compounds considerable containing Continued course crystals described determined direct effect elements Engineers experiments fact further give given glucose heat important increase industry Institute interest iron LABORATORY lead less light liquid London manufacture March material matter means meeting ment metal method nature observed obtained organic oxide passed Patents plant position possible potassium practically precipitate prepared present Price Prof published pure quantities reaction referred regard salt Science separation shown Society sodium solution specific steel structure substance sulphuric temperature tion Trade tube University various volume weight