Oxalic Acid Carbon Monoxide Coupling Method
Ing paralan ayni mumuna yang ginamit palladium ampo copper salts bilang catalysts, ampo ginawa yang liquid-phase coupling reaction ning carbon monoxide, oxygen, alcohol, ampo dilute nitric acid keng 8-11 MPa ampo 90-100 °C. Ing reaksyun mumuna yang magproduce oxalate ester, na kaybat mag hydrolyze ya keng heating conditions para maging oxalic acid ampo ing katumbas a alcohol.
Ing paralan ayni atin yang metung a catalyst system, matas a aktibidad, masanting a selectivity, madaling ibawi, matas a kalinisan ning produktu, ampo mababang polusyun keng produksyun. Makanyan man, atin yang matas a requirements para keng carbon monoxide purity, matas a pamangailangan, mamasang catalysts, ampo matas a puhunan.
Gamit ing Pd/C bilang catalyst, ing carbon monoxide ampo ing nitrite ester mipagkalub la para gawang oxalate ester keng 130 °C ampo atmospheric pressure, ampo ing nitric oxide bilang by-product. Ing oxalic acid ampo ing kayang alcohol mayayakit la kapamilatan ning pamag-hydrolyze keng oxalate ester. Ing makabukud a solusyun ning alcohol mi-reoxid ya para maging nitrite ester, na malyaring i-recycle.
Ing Fujian Institute of Structure of Matter, Chinese Academy of Sciences, migsagawa yang pamanyaliksik keng ratio da reng raw materials ampo miyayaliwang kundisyun ning bilis ning kalawakan keng catalytic synthesis ning dimethyl oxalate keng pamanyaliksik kareng catalysts para keng atmospheric pressure catalytic coupling ning CO keng oxalic acid, ampo kareng mapilang kondisyun a makayagpang. Ing mas masanting a Pd (2.0%)/α-Al2O3 catalyst mika space-time yield yang 999 g/L·h keng lalam ning kundisyun ning atmospheric pressure, 140 °C, CO/CH3ONO=1.5, ampo space velocity a 3000/h. Ing institute makipagsaup ya keng Fujian Petrochemical Design Institute ampo ing Fujian Nanqing Ammonia Plant para gawan ing 100 t/a pilot test ning pamagbawi CO ibat keng synthetic ammonia copper scrubbing, atmospheric pressure catalytic synthesis ning dimethyl oxalate, ampo hydrolysis para maging oxalic acid.
Nung ikumpara me keng liquid-phase a paralan, ining paralan ayni atin yang matas a selectivity, simpleng prosesu, matas a purity ning produktu, ampo mababang gastus keng pamaglalang. Malyari yang gamitan ing natural gas o uling antimong raw materials, at malyari ya muring gamitan ing carbon monoxide a ibat king ammonia copper scrubbing o yellow phosphorus furnace, blast furnace, ampong converter tail gas antimong panibatan ning carbon monoxide gas. At ing parehu, malyari yang mamye mura a materyales para keng pamaglalang ning ethylene glycol ampo ing metung a synthesis a maki oxalate ester bilang intermediate.

Shandong Pulisi Chemical Co., Ltd. | Premium Oxalic Acid Provider
Mitatag ya inyang 2006, ing Pulisi Chemical magspecialize ya keng high-purity oxalic acid (CAS 144-62-7) a makatupad kareng international export standards para kareng industrial ampo refined a uri. Ing kekaming Zibo-based manufacturing facility sisiguraduan na ing mahigpit a pamagkontrol king kalidad, a maki industrial-grade oxalic acid a maki minimum a 96% a kalinisan at ing refined-grade a miraras king 99.6% a kalinisan—a makatupad kareng miyayaliwang pamangailangan ning industriya.
Ing kekaming oxalic acid makabukud ya keng kayang masanting a solubility ampo matatag a chemical properties, magsilbi yang versatile raw material kareng miyayaliwang sector. keng pamagprosesu keng metal, masanting yang makalako keng kalawang ampo keng surface oxide layers ibat keng bakal, aluminum, ampo copper, para mas masanting ing coating adhesion para keng automotive, aerospace, ampo electroplating applications. keng tela, gagawan neng eco-friendly a bleaching agent ampo dye fixative, a magpasanting keng kule ning tela ampo keng liwanag.
Dagdag pa, maralas yang magagamit keng pharmaceutical synthesis, wood processing, rare earth metal extraction, ampo water scale treatment. Certified ya keng ISO 9001 ampo EU REACH, mamye kaming standardized a 25kg a packaging para kareng bulk orders, para makasiguradung mapanalig ing global a suplay. Para keng maragul a industrial a produksyun o high-end a aplikasyun, ing Pulisi Chemical mamye yang pare-pareung kalidad ampo propesyonal a suporta.