Kuwunika kwa Catalytic Udindo wa Sodium Cyanide M'makampani a Petrochemical

Introduction

Sodium cyanide (NaCN), monga chinthu chofunikira kwambiri chachilengedwe, imawonetsa zotsatira zazikulu mu Petrochemical Industry chifukwa cha mankhwala ake apadera. Alkalinity yake yamphamvu, kuthekera kwake kogwirizanitsa, komanso kusinthasintha kwa nucleophilicity zimapangitsa kuti ikhale chothandizira kapena chowonjezera chofunikira pazochitika zosiyanasiyana zamakemikolo. Nkhaniyi ikambirana za udindo wake mu petrochemical industry kuchokera kuzinthu monga Catalytic Mechanism , malo ogwiritsira ntchito, ndi chitetezo.

I. Njira Yothandizira ya Sodium Cyanide

1.Mapangidwe a Zitsulo Complexes

Ioni ya CN⁻ ili ndi mphamvu yolumikizana kwambiri ndipo imatha kupanga ma complexes okhazikika ndi zitsulo zosinthika (monga Ni, Co, Fe, ndi zina). Ma complexes awa amatha kuyambitsa mamolekyu a substrate mu ma catalytic reactions ndikuchepetsa mphamvu yoyambitsa ya reaction. Mwachitsanzo, mu hydrocyanation ya olefins, catalyst yopangidwa ndi Sodium Cyanide ndi nickel salts imatha kulimbikitsa bwino ma olefins ndi HCN kuti apange Nitrile Compound s.

2. Nucleophilic Catalysis

Monga maziko olimba, sodium cyanide imatha kupereka CN⁻ ngati chosinthira cha nucleophilic kuti chigwire nawo ntchito yosintha kapena kuwonjezera ma hydrocarbons a halogenated. Mwachitsanzo, mu cyanidation ya halogenated hydrocarbons, CN⁻ imalowa m'malo mwa halogen kuti ipange mankhwala a nitrile, yomwe ndi njira yofunika kwambiri yopangira ma organic nitriles.

3.Kuwongolera chilengedwe cha Alkaline

Sodium cyanide hydrolyzes kupanga NaOH ndi HCN, yomwe imatha kuwongolera pH mtengo wa machitidwe ndikulimbikitsa zochitika zina za acid-base catalytic (monga hydrolysis kapena condensation wa esters).

II. Zomwe Zimagwiritsidwa Ntchito Pamakampani a Petrochemical

1.Kaphatikizidwe ka Nitrile Compounds

• Kupanga Acrylonitrile : Pakupopera propylene kuti ipange acrylonitrile, Sodium cyanide ingagwiritsidwe ntchito ngati chowonjezera chothandizira kuti chiwongolere kusankha ndi kukolola kwa reaction.

• Kupanga kwa Adiponitrile : Kudzera mu hydrocyanation reaction ya 1.3-butadiene, sodium cyanide imayambitsa kupangika kwa adiponitrile, yomwe ndi chinthu chofunikira kwambiri pa nayiloni-66.

2.Carbonylation Synthesis ndi Hydrogenation Reactions

• Mu carbonylation synthesis reaction, sodium cyanide imagwira ntchito mogwirizana ndi cobalt chothandizira kulimbikitsa kuwonjezereka kwa olefins ndi CO ndi H₂ kupanga mankhwala a aldehyde kapena mowa.

• Monga chowonjezera mu zochita za hydrogenation, sodium cyanide imatha kuwongolera mawonekedwe apakompyuta a chothandizira chachitsulo ndikuwonjezera zomwe zimachitika.

3.Petroleum Cracking ndi Desulfurization

• Panthawi yosweka kwa petroleum, sodium cyanide imatha kulepheretsa kuyabwa ndikuwonjezera moyo wautumiki wa chothandizira.

• Amagwiritsidwa ntchito pochotsa mankhwala okhala ndi sulfure (monga kuchotsa mercaptan). Kudzera mu ma nucleophilic substitution reactions, ma mercaptans amasinthidwa kukhala sulfides kapena disulfides.

III. Ubwino ndi Zovuta

ubwino:

• High chothandizira ntchito ndi selectivity, oyenera zosiyanasiyana zovuta anachita kachitidwe.

• Zotsika mtengo komanso zosavuta kugwiritsa ntchito mafakitale.

mavuto:

• Kuopsa kwa poizoni : Sodium cyanide ndi poizoni kwambiri, ndipo kuwongolera mosamala momwe zinthu zimagwirira ntchito kumafunika kuti tipewe kutuluka kwa madzi kapena kukhudzana ndi madzi.

• Mavuto a Zachilengedwe : Madzi otayira okhala ndi cyanide ayenera kutsukidwa (monga njira ya alkaline chlorination) kuti akwaniritse miyezo yotulutsira madzi kuti apewe zoopsa zachilengedwe.

• Mpikisano wochokera ku ukadaulo wina : Ndi chitukuko cha chemistry yobiriwira, biocatalysis kapena ionic liquid catalysts pang'onopang'ono zikulowa m'malo mwa njira zina za sodium cyanide.

IV. Chitetezo ndi Njira Zotetezera Zachilengedwe

1. Chitetezo Chopanga : Gwiritsani ntchito zida zotsekedwa, khalani ndi chida chodziwira hydrogen cyanide ndi alamu, ndipo ogwiritsa ntchito ayenera kuvala zovala zoteteza ndi zophimba nkhope za gasi.

2. Kukonza Madzi Otayidwa : Sinthani CN⁻ kukhala CO₂ ndi N₂ yopanda poizoni pogwiritsa ntchito njira ya okosijeni (monga kugwiritsa ntchito ClO₂ kapena H₂O₂).

3. Kukonza Njira : Pangani ukadaulo wobwezeretsanso zinthu kuti muchepetse kugwiritsa ntchito sodium cyanide; fufuzani njira zopangira zinthu zopanda cyanide (monga kugwiritsa ntchito ma nitrile achilengedwe ngati zinthu zina).

Kutsiliza

Sodium cyanide, yokhala ndi zida zake zapadera, imagwira ntchito yofunika kwambiri pamakampani a petrochemical, makamaka m'magawo monga kaphatikizidwe ka nitrile ndi machitidwe a carbonylation, pomwe sangalowe m'malo. Komabe, kuopsa kwake komanso kuwopsa kwa chilengedwe kumapangitsanso makampaniwo kuti asinthe kukhala otetezeka komanso obiriwira opangira matekinoloje. M'tsogolomu, ndikupita patsogolo kwa mapangidwe othandizira ndi kukhathamiritsa kwa njira, kugwiritsa ntchito sodium cyanide kudzakhala kothandiza komanso kosatha.