| 摘要 |
<p>1,200,210. Food preservative. J O S . SCHLITZ BREWING CO. 23 Nov., 1967 [25 Nov., 1966], No. 53417/67. Heading A2D. [Also in Divisions C1 and C2] Preservatives for perishable materials such as vegetables, fruits, wine, ale, beer and pharmaceutical products comprise compounds of the general formula where R 1 and R 2 are substituted or unsubstituted alkyl, cycloalkyl, alkenyl, cycloalkenyl, alkynyl, cycloalkynyl, aryl or mixed alkyl-aryl radicals having from 1 to 24 carbon atoms. Examples describe the treatment of contaminated fruit juice and beer using oxalic bis (ethyl carbonic anhydride) and the corresponding n-propyl and n-pentyl compounds.</p> |
