Show fire pro lection made much Cli cheaper caper by a fatame 1 roof ingy acid by HOPE RT D POTTER POTTE it dallas texas increased low cost fire protection for americas homes should soon be possible through advances in chemical engineering revealed at the meeting of the american chemical society here chemistry by a new process Is now able to make maka cheaply and in vast quantities an acid from which can be made a unique chemical the known as ammonium does not change the appe appearance aranca or feel eel of fabrics or paper impregnated with it moreover it Is not affected by dry cleaning methods so that it will safeguard draperies upholstery and other household furnishings during their lifetime parent raw material of tho the 11 flame ame proofing chemical Is salfa mic acid which while known for more than IDO years lies has previously been made only by costly laboratory processes thus its ammonium salt was too high priced to bo be readily available to most people A method for the large scale production ot of sull amic odd acid has now been devised and put into operation martin E cupery chemical engineer of E L I 1 du pont font do nemours co declared in his report to the chemists developed hero and in germany acid Is made ando from urea urca ond and fuming sulp sulphuric hurle acid by the now process which by one of the coincidences of science has almost simultaneously appeared in germany and in the united states independently the new large scale commercial method of making acid said mr cupery has mado made available for many uses a new industrial raw material As prepared it Is a colorless crystalline substance looking something like the naph naphthalene thal ene of moth balls but without the odor lor for sulf amle add acid la Is odorless A particularly useful property of acid mr cupery asserted Is its inability to take up water because it la Is hygroscopic non this very strong add acid can easily be shipped and stored without danger of wetting however the salts of acid of which the chemical Is only one are soluble tn in water with one exception immersion mer sion in fact Is the way tho the chemical Is applied to fabrics or paper for tilts this reason the materials mata materials rials flame flameproof proofed cd cannot be ba washed without destroying the ure combating effects |