Process for the preparation of 2- and 4-homologues of pyridine
DE594552C
Process for the preparation of acid anhydrides
DE565476C
Process for the production of carboxylic acids from alcohols and aldehydes
DE553161C
Process for the production of transparent plates
DE544415C
Process for preventing the deposition of silver on prepared surfaces in the manufacture of silver mirrors
DE566506C
Process for forming condensation products from carbamides and aldehydes
DE572267C
Process for the production of condensation products from formaldehyde and urea with the use of condensation products from phthalic anhydride and polyhydric alcohols
DE561050C
Process for the production of urea-formaldehyde condensation products
DE551422C
Process for the production of light, crystal-clear condensation products from urea and formaldehyde
