Oxalic Acid Carbon Monoxide hmanga inzawmkhawm dan
Hetiang method hian a tirah chuan palladium leh copper salt te chu catalyst atan a hmang a, carbon monoxide, oxygen, alcohol leh dilute nitric acid te chu 8–11 MPa leh 90–100 °C ah liquid-phase coupling reaction a nei a. Reaction hian oxalate ester a siam hmasa a, chu chu heating condition hnuaiah hydrolyze in oxalic acid leh a kaihhnawih alcohol a siam a ni.
Hetiang method hian catalyst system pakhat a nei a, activity sang tak, selectivity tha tak, recovery awlsam tak, product thianghlimna sang tak, leh production pollution hniam tak a nei a ni. Mahse, carbon monoxide thianghlimna mamawhna sang tak, hman tamna, catalyst man to tak tak, leh investment sang tak a nei a ni.
Pd/C chu catalyst atan hmangin carbon monoxide leh nitrite ester te chu inzawmkhawmin 130 °C leh boruak pressure-ah oxalate ester siamin, nitric oxide chu by-product atan hman a ni. Oxalic acid leh a kaihhnawih alcohol chu oxalate ester chu hydrolyze-in kan hmu thei a ni. Alcohol solution inthen chu reoxidized a ni a, nitrite ester a siam a, chu chu recycle theih a ni.
Fujian Institute of Structure of Matter, Chinese Academy of Sciences chuan CO leh oxalic acid atmospheric pressure catalytic coupling atana catalyst zirchiannaah dimethyl oxalate catalytic synthesis chungchanga raw materials ratio leh space velocity condition hrang hrangte zirchianna an nei a, reaction condition remchang an thlang bawk. Pd (2.0%)/α-Al2O3 catalyst siam \hat hian boruak pressure, 140 °C, CO/CH3ONO=1.5, leh space velocity 3000/h-ah space-time yield 999 g/L·h a nei thei a ni. Institute hian Fujian Petrochemical Design Institute leh Fujian Nanqing Ammonia Plant te nen thawkdunin, synthetic ammonia copper scrubbing atanga CO lakchhuahna, atmospheric pressure catalytic synthesis of dimethyl oxalate, leh hydrolysis to oxalic acid atanga CO lakchhuahna pilot test 100 t/a an nei a ni.
Liquid-phase method nena khaikhin chuan he method hian selectivity sang tak, simple process, product purity sang tak, leh production cost hniam tak a nei a ni. Natural gas emaw coal emaw chu raw material atan a hmang thei a, ammonia copper scrubbing emaw yellow phosphorus furnace, blast furnace, leh converter tail gas atanga carbon monoxide hmuhchhuah chu carbon monoxide gas source atan a hmang thei bawk. Chutih rual chuan ethylene glycol siamna tur leh oxalate ester chu intermediate atan unified synthesis siamna tur raw material man tlawm zawk a pe thei bawk.

Shandong Pulisi Chemical Co., Ltd. chuan a rawn ti a Premium Oxalic Acid pe theitu a ni
Kum 2006-a din Pulisi Chemical hian industrial leh refined grade-a international export standard zawmtu, high-purity oxalic acid (CAS 144-62-7) siamnaah a specialise a ni. Kan Zibo-based manufacturing facility hian quality control khauh tak a tichiang a, industrial-grade oxalic acid hian a tlem berah 96% thianghlimna a nei a, refined-grade hian 99.6% thianghlimna a thleng bawk—industry mamawh hrang hrang a phuhruk a ni.
Kan oxalic acid hi a solubility tha tak leh chemical property stable tak a neih avangin a langsar hle a, sector hrang hrangah raw material versatile tak angin a thawk a ni. Metal processing-ah chuan steel, aluminium leh copper atanga rust leh surface oxide layer te chu tha takin a paih chhuak a, hei hian automotive, aerospace leh electroplating application atan coating adhesion a tichak a ni. Textile-ah chuan eco-friendly bleaching agent leh dye fixative angin a thawk a, puan rawng fastness leh brightness a ti tha hle.
Tin, damdawi siamna kawngah te, thing siamna kawngah te, rare earth metal lakchhuahnaah te, tui scale hmanga tihfai nan te pawh hman a ni nasa hle bawk. ISO 9001 leh EU REACH hmanga certificate kan dawng a, bulk order atan standardized 25kg packaging kan supply a, hei hian khawvel pum huapa supply rintlak tak a siam a ni. Industrial production lian tham emaw, high-end application emaw atan pawh nise, Pulisi Chemical hian quality leh professional support mumal tak a pe chhuak thin.