Txoj Kev Oxidation Glyoxal ntawm Oxalic Acid
Glyoxal muaj zog reducibility, yog li nws tuaj yeem oxidized sai rau oxalic acid nyob rau hauv qhov kev ua ntawm nitric acid oxidizing muaj zog. Vim yog cov yam xws li kev muab khoom siv raw, tus nqi, thiab thev naus laus zis, txoj kev no muaj kev sib tw ua lag luam tsis zoo thiab tsis tau muaj kev lag luam.
Tsis tas li ntawd xwb, muaj lwm txoj kev siv tshuaj rau oxalic acid:
(1) Txoj kev npaj cov pa roj carbon dioxide: Cov pa roj carbon dioxide raug txo qis ua ntej mus rau qhov nruab nrab
CO2
thiab tom qab ntawd hloov mus ua lwm yam organic. Oxalic acid yog tau los ntawm kev irradiating ntau yam carbon dioxide systems nrog electrochemical txoj kev thiab γ-rays, tshav ntuj, lossis high-pressure mercury teeb.
(2) Txoj kev yaj alkali siv cov khoom nplua nuj cellulose: Kev sib xyaw ntawm cov khoom nplua nuj cellulose (xws li ntoo pov tseg, chaff, thiab lwm yam) thiab inorganic muaj zog alkali yog co-yaj ntawm 513–558 K los tsim ntau dua 50% oxalate. Cov oxalate siv lead ua los ntawm crystallization, thiab tom qab ntawd sulfuric acid siv los tau txais cov oxalic acid tiav. Txoj kev no muaj cov txheej txheem yooj yim rau kev npaj oxalic acid, tab sis tus nqi hloov pauv ib zaug yog qis (tsawg dua 35%), kev siv alkali siab, thiab kev ua qias tuaj ib puag ncig yog hnyav.
(3) Txoj kev tsim cov khoom siv raw thee: Npaj los ntawm ntau yam peats ua cov khoom siv raw. Piv txwv li, oxalic acid yog tsim los ntawm peat ntawm genera Sphagnum thiab Polytrichum los ntawm nitric acid oxidation. Cov tshuaj tiv thaiv yog nqa tawm ntawm 343 K rau 8-9 teev, nrog rau cov txiaj ntsig txog li 95%. Thaum cov khoom siv raw xws li thee tar siv los tsim oxalic acid, cov txiaj ntsig kuj ncav cuag 51%.

Shandong Pulisi Chemical Co., Ltd. – Kws Tshwj Xeeb Oxalic Acid (Ethanedioic Acid)