NBEA vs BDEA
Qhov txawv, Khoom & Yuav Ua Li Cas Xaiv Ntawm N-Butylethanolamine thiab N-Butyldiethanolamine
Lub taub hau -rau- lub taub hau kev sib piv rau cov txheej txheem engineers, metalworking fluid formulators, thiab corrosion inhibitor chemists txiav txim siab ntawm ob butyl -series alkanolamines.
📋 Hauv kab lus no
- Ceev- teb cov ntsiab lus: qhov twg los xaiv
- Qhov sib txawv hauv paus: thawj vs theem nrab amine
- Kev sib piv cov qauv thiab cov khoom molecular
- Sab -los ntawm - sab lub cev & tshuaj thaj chaw lub rooj
- Metalworking fluids: thawj qhov chaw sib ntaus sib tua
- Corrosion inhibitor pob khoom
- Gas kho thiab CO₂ / H₂S nqus
- Solvent thiab tshwj xeeb siv tshuaj
- Kev nyab xeeb thiab kev tuav sib txawv
- Cov lus nug uas nquag nug
1. Ceev-Cov ntsiab lus teb ✅
Yog tias koj twb paub cov hauv paus ntsiab lus thiab xav tau lub moj khaum kev txiav txim siab ceev:
Xaiv NBEA thaum…
- Koj xav tausai dua, muaj zog tshuaj tiv thaivnrog acid Cheebtsam (primary amine reactivity)
- CO₂ or H₂Scarbamate- tsim kev nqusyog yuav tsum tau
- Lub formulation hu rau aqis kub taw tesamine uas tuaj yeem rov qab los ntawm distillation
- Synthesis ntawmmorpholine derivativeslos yog lwm yam cyclic intermediates
- Aqueous -phase metalworking fluids qhov twglub hauv paus muaj zogyog xav tau rau kev tswj pH
Xaiv BDEA thaum…
- Koj xav tausiab kub taw tesrau thermal stability nyob rau hauv siab -kub txheej txheem
- Ob pawg hydroxylyog xav tau rau chelation, complexation, los yog dual hydrogen bonding
- Hlau ua kuantev -lub sij hawm pH tsis ruaj khovyog qhov tseem ceeb
- Tsawg volatilitytxo amine tsw thiab vapor poob thaum siv
- Nto-active corrosion inhibitor zaj duab xis tsim - lubtheem nrab N-H thiab ob-OH pawgmuab cov ntsiab lus adsorption ntau dua
2. Qhov Tseem Ceeb Qhov txawv: Thawj VS Secondary Amine 🔬
Qhov tseem ceeb tshaj qhov txawv ntawm NBEA thiab BDEA tsis yog tus naj npawb ntawm hydroxyl pawg - nws yogdegree ntawm nitrogen hloov. NBEA yog ibthawj amine(ib daim ntawv cog lus N-H); BDEA yog atheem nrab amine(ib daim ntawv cog lus N-H, tab sis flanked los ntawm ob pawg hydroxyethyl thiab ib txoj saw butyl).
NBEA - Primary amine
CH₃(CH₂)₃–NH–CH₂CH₂OH
CAS Nr .: 111-75-1
BDEA - Secondary amine
CH₃(CH₂)₃–N(CH₂CH₂OH)₂
CAS: 102-79-4 Nr
Qhov sib txawv ntawm cov qauv no - ib -OH pawg vs ob, thiab thawj vs theem nrab nitrogen - cascades rau hauv kev ntsuas qhov sib txawv ntawm txhua yam khoom muaj feem xyuam: boiling point, basicity, CO₂ reactivity mechanism, corrosion inhibition film quality, water solubility, and handle requirements. Txhua yam ntawm no yog tshuaj xyuas hauv kev nthuav dav hauv qab no.
Nomenclature Note:BDEA qee zaum raug qhia tsis raug raws li tertiary amine vim tias nws tsis muaj N-H pom hauv cov qauv yooj yim. Qhov tseeb, cov nitrogen hauv BDEA nqa ib qho hydrogen (nws yog qhov thib ob amine: R₂NH). Ob pawg hydroxyethyl yog O- hloov pauv, tsis yog N- hloov ntawm amine. Qhov kev sib txawv no txiav txim siab nws cov CO₂ reactivity thiab nitrosamine qhov profile.
3. Sab-los ntawm-Side Physical & Chemical Properties 📊
| Khoom | NBEA | BDEA |
|---|---|---|
| Hom Amine | Thawj (–NH–) | Secondary (–N<) |
| Hydroxyl pawg | 1 × – OH | 2 × – OH |
| Molecular hnyav | 103.16 g / mol | 161.24 g / mol |
| Kub point (1 atm) | 199 degree | 274 degree |
| Flash point (lub khob kaw) | ~ 78 degree | ~ 138 degree |
| Ceev (20 degree) | 0.890 g / cm³ | 0.969 g / cm³ |
| Vapor siab (20 degree) | ~ 0.3 hPa | <0.01 hPa(tsawg kawg) |
| pKa (conjugate acid, 25 degree) | ~10.0(muaj zog puag) | ~8.8(tsis muaj zog base) |
| Dej solubility (20 degree) | Siab miscible | Siab miscible |
| Log P (octanol / dej) | 0.36 (me me lipophilic) | 0.53 (me ntsis ntau lipophilic) |
| CO₂ tshuaj tiv thaiv mechanism | Carbamate tsim | Carbamate tsim |
| Viscosity (25 degree) | ~ 5 mPa· os | ~ 30 mPa · s |
| Nitrosamine txaus ntshai | ⚠️ Tsawg (thawj - tsis muaj theem N) | ⚠️ Nruab nrab (secondary amine) |
| GHS flammability | Flam. Liq. 3 (fp ~ 78 degree) | Not classified as flammable (fp >100 degree) |
4. Metalworking Fluids: The Primary Battleground 🔧
Metalworking fluids (MWFs) - suav nrog cov roj soluble txiav, semi-synthetic coolants, thiab cov kua sib tsoo - yog cov ntawv thov loj tshaj plaws rau NBEA thiab BDEA. Nyob rau hauv cov ntsiab lus no, alkanolamine pab peb sib tshooj ua haujlwm: pH buffering, corrosion inhibition, thiab emulsion stabilization.
NBEA hauv metalworking fluids
- Siab dua pKa (10.0) txhais tau tias zoo dua pH buffering ntawm 8.5–9.5 - qhov zoo tshaj plaws rau kev tiv thaiv hlau ferrous
- Primary amine reacts sai nrog fatty acids nyob rau hauv lub concentrate los tsim xab npum, pab txhawb rau emulsion stability.
- Tsawg viscosity txhim kho yooj yim ntawm blending thiab mloog zoo tuav
- Kev hloov pauv ntau dua - tej zaum yuav xav tau sab saum toj- nce hauv cov dej qhib thaum lub sijhawm
- Hom kev siv qib: 2–6% hauv kev npaj-rau- siv cov dej txias
BDEA hauv cov kua ua haujlwm hlau
- Tsawg vapor siab txhais tau hais tias tsis pom zoo amine poob los ntawm cov dej kub - pH stability nyob rau lub neej ntev
- Ob -OH pawg ntxiv rau ib N-H muab ntau qhov chaw adsorption ntawm cov hlau nto → muaj zog tiv thaiv zaj duab xis
- Secondary amine reacts nrog fatty acids los tsim ntau qhov chaw - nquag amide xab npum thaum lub sij hawm
- Cov ntsiab lus kub siab dua haum rau siab - kub sib tsoo thiab sib sib zog nqus- qhov drilling ua haujlwm
- Hom kev siv qib: 1–4% hauv kev npaj-rau- siv cov dej txias (MW siab dua txhais tau tias tsawg dua moles ib kg)
Common formulation xyaum:Muaj ntau yam khoom siv hlau ua kua dej sivKev sib xyaw ntawm NBEA thiab BDEAtsis yog ib leeg xwb. NBEA muab thawj pH nce sai thiab emulsion kick-tawm; BDEA muab sijhawm ntev -pH ruaj khov thiab txhim khu kev tiv thaiv zaj duab xis ntawm cov hlau nto. Ib qho piv txwv yog 60: 40 txog 70: 30 NBEA: BDEA los ntawm qhov hnyav, hloov kho rau lub hom phiaj dej txias pH thiab sump kev pab cuam lub neej.
10.0
NPE pKa
Lub hauv paus muaj zog → pH sai dua, ua haujlwm siab dua pH qab nthab
8.8
BDEA pKa
Lub hauv paus tsis muaj zog → pH ruaj khov dua li lub neej ua haujlwm, txo qis dua
8.5–9.5
Target coolant pH
Ob qib siv tau; blend optimizes pib vs ntev -lub sij hawm stability
5. Corrosion Inhibitor Packages 🛡️
Ob leeg NBEA thiab BDEA ua haujlwm ua cov tshuaj tiv thaiv corrosion los ntawm kev sib xyaw ntawm pH nce siab (ua rau qhov chaw aqueous tsawg corrosive) thiab ncaj qha adsorption mus rau cov hlau qhov chaw (ua kom muaj kev tiv thaiv amine zaj duab xis). Cov txheej txheem sib txawv hauv txoj hauv kev tseem ceeb.
NBEA: pH- tswj kev tiv thaiv corrosion
NBEA thawj pawg amine tsim ib qho protonated cation (R–NH₃⁺) hauv dej. Qhov no cation yog electrostatically attracted rau cov cathodic qhov chaw ntawm hlau nto (uas nqa cov electrons ntau tshaj nyob rau hauv ib tug aqueous corrosion cell), ib feem thaiv cov pa oxygen. Qhov tseem ceeb tshaj, NBEA lub siab pKa tswj cov dej txias lossis dej - kho pH zoo tshaj qhov tseem ceeb (~pH 8.5) qhov twg hlau passivation ua tau zoo. Kev tiv thaiv corrosion yog feem ntau tsis ncaj qha - ntawm pH tswj - es tsis yog los ntawm kev tsim cov yeeb yaj kiab.
BDEA: zaj duab xis- tswj kev tiv thaiv corrosion
BDEA's thib ob N-H daim ntawv cog lus thiab ob -OH pawg muab nws peb qhov chaw muaj peev xwm -cov ntsiab lus adsorption ib molecule, piv rau NBEA ob. Qhov ntau dua ntawm cov pab pawg anchoring ib molecule txhais tau tias BDEA tsim ib tug denser, ntau tenacious tiv thaiv zaj duab xis ntawm hlau nto, tshwj xeeb tshaj yog ferrous hlau thiab txhuas. Qhov no yog vim li cas BDEA- muaj cov kua dej feem ntau pom zoo cam khwb cia- hlau tiv thaiv corrosion nyob rau hauv ASTM D4627 nti/filter paper corrosion tests, txawm nyob rau tib molar concentration li NBEA.
Mixed hlau systems (ferrous + aluminium + tooj liab alloys)
Rau kev sib xyaw-hlau machining ib puag ncig (xws li, cav thaiv kab sib txuas ua ke grey hlau, aluminium, thiab tooj liab-beryllium alloys), BDEA feem ntau nyiam ua thawj alkanolamine tivthaiv vim tias nws cov yeeb yaj kiab- tsim cov txheej txheem muab kev pabcuam dav dav thoob plaws ntau hom hlau. NBEA tuaj yeem raug ntxiv los ua ib qho kev tivthaiv thib ob los txhawb pH buffering peev. Copper- cov ntawv thov rhiab heev yuav tsum tau ua kom tiav nrog cov tshuaj tiv thaiv tooj liab tshwj xeeb (piv txwv li, benzotriazole) tsis hais qhov twg alkanolamine siv.
6. Gas Treatment thiab CO₂/H₂S Absorption 🏭
Tsis zoo li DMEA/DEAE kev sib piv - qhov twg ob qho tib si yog tertiary amines uas tsuas tuaj yeem tsim bicarbonate - ob qho tib si NBEA thiab BDEA muaj peev xwm ua tau ncaj qha carbamate tsim nrog CO₂, vim tias ob leeg nqa tsawg kawg yog ib daim ntawv cog lus N-H. Qhov no ua rau lawv ob leeg siv tau rau kev kho cov roj amine, txawm tias muaj qhov sib txawv ntawm kev ua tau zoo.
| Parameter | NBEA | BDEA |
|---|---|---|
| CO₂ absorption mechanism | Carbamate (ceev) | Carbamate (nruab nrab) |
| txheeb ze tus nqi nqus | Faster (thawj amine) | Slower (secondary amine, steric nyhuv ntawm 2 × hydroxyethyl) |
| H₂S xaiv | Tsawg (nqus CO₂ thiab H₂S) | Nruab Nrab (thib ob amines qhia me ntsis zoo dua H₂S / CO₂ xaiv) |
| Regeneration kub | 100-120℃typical | 110-130℃(muaj zog carbamate) |
| Solvent loading muaj peev xwm | Txog li 0.5 mol CO₂ / mol amine | Txog li 0.5 mol CO₂ / mol amine |
| Solvent poob rau cov roj kho | Siab dua (bp 199 degree) | qis (bp 274 degree, siab vapor siab heev) |
Gas kho cov lus ceeb toom:Tsis yog NBEA lossis BDEA tsis yog tus qauv ua ntej - xaiv cov kuab tshuaj rau kev kho cov roj ntau (lub luag haujlwm ntawd yog MEA, DEA, MDEA, lossis lawv cov khoom sib xyaw). Txawm li cas los xij, ob qho tib si tshwm sim nyob rau hauv tshwj xeeb sib xyaw amine formulations qhov twg lawv cov butyl saw cov ib nrab hydrophobicity pab tswj foaming tendencies los yog qhov twg lawv cov pKa / xaiv profile muaj ib tug txheej txheem kom zoo dua. Tham nrog koj tus kws kho mob cov cuab yeej siv hluav taws xob ua ntej hloov mus rau hauv ib qho amine unit tsim.
7. Solvent and Specialty Chemical Applications ⚗️
🧪 NBEA tshwj xeeb siv
- Morpholine synthesis ua ntej- cyclization nrog diethylene glycol lossis zoo sib xws; siv nyob rau hauv fungicide thiab roj hmab accelerator ntau lawm
- Kev tiv thaiv qoob loo intermediates- butyl- hloov morpholine fungicides (piv txwv li, chav kawm fenpropimorph)
- Resin curing tus neeg sawv cev- pawg thawj amine reacts nrog epoxide lossis isocyanate functionality
- Textile pab- dyeing assistant thiab leveling agent hauv wool processing
🧪 BDEA tshwj xeeb siv
- Lubricant additive- ob pab pawg -OH muab cov ciam teb zoo lubrication zaj duab xis ntawm cov hlau nto hauv cov roj iav thiab cov roj compressor
- Surfactant nruab nrab- reacts nrog fatty acids los tsim diethanolamine-hom amides nrog butyl- txhim kho lipophilicity
- Chelating agent tsev thaiv- ob txhais tes hydroxyl tuaj yeem koom tes nrog cov hlau ions; siv hauv hlau- ua haujlwm thiab tu cov qauv
- Urethane catalyst modifier- siv nyob rau hauv polyurethane ua npuas ncauj formulations uas yuav tsum tau ncua kev txiav txim
8. Kev nyab xeeb thiab tuav qhov sib txawv ⚠️
⚠️ NBEA - cov ntawv ceeb toom kev nyab xeeb
- Flash point ~78℃- caisFlam. Liq. 3; tswj cov khoom siv hluav taws xob thaum hloov tsheb
- Skin Corr. 1B - ua rau tawv nqaij kub hnyiab ntawm kev sib cuag ntev; Yuav tsum muaj PPE tag nrho
- Qhov muag Dam. 1 - tam sim ntawd thiab tag nrho lub qhov muag yaug yog tias muaj kev sib cuag
- Amine tsw pom tau ntawm qis ppm - LEV qhov cua pom zoo nyob rau hauv cov chaw tuav
- UN 2372, Chav Kawm 3/8, PG III
⚠️ BDEA - cov ntawv ceeb toom kev nyab xeeb
- Flash point ~ 138℃-tsis cais raws li cov kua flammablenyob rau hauv GHS; wider ambient tuav kev ruaj ntseg margin
- Daim tawv nqaij Irrit. 2 (tsawg dua NBEA) - tab sis kev sib cuag ntawm daim tawv nqaij tseem xav tau hnab looj tes nitrile
- Qhov muag Dam. 1 - tib yam kev tiv thaiv qhov muag raws li NBEA
- Tsis tshua muaj vapor siab → txo qis qhov nqus pa ntawm qhov kub thiab txias
- Secondary amine -nitrosamine tsim kev pheej hmooyog tias co-formulated nrog nitrosating agents; zam sodium nitrite nyob rau hauv tib formulation
- UN 3267, Chav Kawm 8, PG III
| Kev tuav tes scenario | NBEA Risk Level | BDEA theem kev pheej hmoo |
|---|---|---|
| Ambient bulk transfer (drumming) | Nruab nrab - flammable vapor txhawj xeeb | Tsawg - vapor tsis pom zoo ntawm ambient temp |
| Cov txheej txheem kub (siab tshaj 80 degree) | Siab dua - mus txog qhov chaw flash point | Tsawg - flash point 138 degree, dav npoo |
| Daim tawv nqaij tiv thaiv corrosion | Siab dua - Skin Corr. 1B | Lower - Daim tawv nqaij Irrit. 2 |
| Nitrosamine tsim kev pheej hmoo | Tsawg heev (primary amine) | Nruab nrab - zam nrog cov tshuaj nitrosating |
9. Cov lus nug uas nquag nug ❓
🔗 Cov nplooj ntawv ntsig txog cov khoom lag luam
N-Butylethanolamine (NBEA)
CAS 111-75-1 · Primary amine · bp 199 degree
Metalworking fluids · gas treatment · morpholine synthesis · textile auxiliaries
N-Butyldiethanolamine (BDEA)
CAS 102-79-4 · Secondary amine · bp 274 degree
Metalworking fluids · corrosion inhibitors · lubricant additives · surfactant intermediates
Thov cov qauv los yog ntau tus nqi
Tham nrog Sinolook Chemical
Peb muab ob qho tib si NBEA thiab BDEA hauv cov khoom lag luam nrog SGS - kuaj CoA, cov ntaub ntawv REACH tag nrho, thiab cov khoom xa tawm yooj yim. Nruas, IBC, thiab ISO tank muaj. Qauv thov txais tos.
sales@sinolookchem.com
📱 WhatsApp pab pawg
+86 181 5036 2095
💬 WeChat / Tel
+86 134 0071 5622
🌐 Lub Vev Xaib
sinolookchem.com
