Hanyar Oxidation ta Glyoxal na Oxalic Acid
Glyoxal yana da ƙarfin ragewa, don haka ana iya haɗa shi da sauri zuwa oxalic acid a ƙarƙashin tasirin nitric acid mai ƙarfi. Saboda dalilai kamar wadatar kayan masarufi, farashi, da fasaha, wannan hanyar ba ta da kyau a kasuwa kuma ba a haɓaka ta a masana'antu ba.
Bugu da ƙari, akwai wasu hanyoyin roba don oxalic acid:
(1) Hanyar shirya carbon dioxide: Da farko ana rage carbon dioxide zuwa matsakaici
CO2
sannan a canza shi zuwa wasu sinadarai na halitta. Ana samun sinadarin Oxalic acid ta hanyar haskaka tsarin carbon dioxide daban-daban ta hanyar amfani da hanyoyin lantarki da hasken γ, hasken rana, ko fitilun mercury masu matsin lamba.
(2) Hanyar narkewar Alkali ta amfani da kayan da ke ɗauke da cellulose: Cakuda kayan da ke ɗauke da cellulose (kamar itacen sharar gida, ƙaiƙayi, da sauransu) da alkali mai ƙarfi marasa tsari ana narkar da su tare a 513–558 K don samar da fiye da kashi 50% na oxalate. Ana haifar da lu'ulu'u na oxalate ta hanyar crystallization, sannan ana amfani da sulfuric acid don samun oxalic acid ɗin da aka gama. Wannan hanyar tana da tsari mai sauƙi don shirya oxalic acid, amma ƙimar juyawa sau ɗaya yana da ƙasa (ƙasa da 35%), yawan amfani da alkali yana da yawa, kuma gurɓataccen muhalli yana da tsanani.
(3) Hanyar samar da albarkatun kwal: An shirya shi daga nau'ikan peat daban-daban a matsayin albarkatun kasa. Misali, ana samar da oxalic acid daga peat na Sphagnum da Polytrichum ta hanyar hada sinadarin nitric acid. Ana gudanar da aikin a 343 K na tsawon awanni 8-9, tare da yawan amfanin da ya kai 95%. Lokacin da aka yi amfani da albarkatun kasa kamar kwal tar don samar da oxalic acid, yawan amfanin kuma ya kai 51%.

Kamfanin Shandong Pulisi Chemical Co., Ltd. – Ƙwararren Acid Oxalic (Acid Ethanedioic)