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DMEA vs DEAE: Qhov txawv, Cov Khoom & Yuav Ua Li Cas Xaiv Txoj Cai Tertiary Alkanolamine

Mar 16, 2026

Tso lus

⚗️ Xaiv Phau Ntawv Qhia

DMEA vs DEAE
Qhov txawv, Cov Khoom & Yuav Ua Li Cas Xaiv Txoj Cai Tertiary Alkanolamine

Lub taub hau -rau- lub taub hau kev sib piv rau cov tsim qauv, cov txheej txheem engineers, thiab pab pawg neeg muag khoom txiav txim siab ntawm ob qho tib si uas muaj feem cuam tshuam nrog qib qib amines.

📋 Hauv kab lus no

  1. Ceev- teb cov ntsiab lus: qhov twg los xaiv
  2. Kev sib piv cov qauv: dab tsi ua rau lawv txawv
  3. Sab -los ntawm - sab cev nqaij daim tawv & tshuaj lom neeg
  4. Daim ntawv thov -los ntawm - daim ntawv qhia kev xaiv
  5. Waterborne coatings: qhov kev txiav txim siab tshaj plaws
  6. Kev saib xyuas tus kheej & tshuaj pleev ib ce
  7. CO₂ absorption & gas kev kho mob
  8. Corrosion inhibition & boiler dej kho
  9. Kev nyab xeeb, kev tswj hwm & tuav qhov sib txawv
  10. Cov lus nug uas nquag nug

1. Ceev-Cov ntsiab lus teb ✅

Yog tias koj twb paub txog ob qho tib si thiab tsuas yog xav tau lub moj khaum kev txiav txim siab ceev:

Xaiv DMEA thaum…

  • Koj xav tau amine rauvolatilize los ntawm zaj duab xistom qab kho (dej txheej txheej)
  • Koj xav taulub hauv paus muaj zog(pKa 9.2) kom ceev neutralization
  • Koj xav tautus nqi qis dua ib molentawm amine functionality
  • Tsawg- ntxhiab ammonia- dawbplaub hau ximcov qauv
  • CO₂ txhuam txhuam qhov twgceev cov tshuaj tiv thaivteeb meem

Xaiv DEAE thaum…

  • Daim ntawv thov xav tauqis volatility(siab dua qhov kub kub, nyob hauv qhov system)
  • Zoo duaorganic-phase compatibilityyuav tsum tau (diethyl pawg)
  • Boiler dej / chav dej condensatekev kho mob (volatilizes nrog chav ntawm kev tswj tus nqi)
  • Polyurethane ua npuas ncaujcatalyst neutralization
  • Solvent systems qhov twgdej miscibility yuav txo tau

2. Kev sib piv cov qauv: Dab tsi ua rau lawv txawv 🔬

DMEA thiab DEAE sib koom tib lub cev pob txha molecular - tertiary amine nrog ib pab pawg hydroxyethyl - tab sis txawv tsuas yog ob qho alkyl hloov pauv ntawm nitrogen:

DMEA

(CH₃)₂N–CH₂CH₂OH

Obmethylpab pawg ntawm N

Qhov hnyav: 89.14 g / mol

CAS: 108-01-0 Nr

DEAE

(C₂H₅)₂N–CH₂CH₂OH

Obethylpab pawg ntawm N

Qhov hnyav: 117.19 g / mol

CAS: 100-37-8 Nr

Kev hloov ntawm ob pawg methyl (DMEA) nrog ob pawg ethyl (DEAE) ntxiv 28 g / mol ntawm molecular hnyav thiab plaub ntxiv carbon atoms. Qhov kev hloov me me no zoo li cascades rau hauv qhov ntsuas qhov sib txawv ntawm qhov kub hnyiab, vapor siab, lipophilicity, yooj yim, thiab solubility - tag nrho cov teeb meem hauv kev siv tiag tiag.

💡

Ob leeg yogtertiary amines- tsis muaj N–H daim ntawv cog lus, yog li tsis tuaj yeem tsim cov carbamate nrog CO₂. Ob leeg hnov ​​​​tsw nrog CO₂ nkaus xwb ntawm txoj kev bicarbonate (R₃N + H₂O + CO₂ → R₃NH⁺ + HCO₃⁻). Qhov no qeeb dua li thawj / theem nrab amine absorption tab sis yuav tsum muaj tsawg zog rov tsim dua tshiab - ib qho txiaj ntsig tseem ceeb hauv cov tshuab hnyav hnyav.

3. Sab-los ntawm-Side Physical & Chemical Properties 📊

Khoom DMEA DEAE
Cov mis mos molecular C₄H₁₁NO C₆H₁₅NO
Molecular hnyav 89,14 g / mol 117.19 g / mol
Kub point (1 atm) 135 degree 162 degree
Flash point (lub khob kaw) 43 degree ⚠️ 60 degree
Ceev (20 degree) 0.887 g / cm³ 0.884 g / cm³
Viscosity (25 degree) ~ 3.0 mPa · s ~ 3.8 mPa· os
Vapor siab (20 degree) ~ 8 hPa(siab dua) ~ 1.5 hPa(qis)
pKa (conjugate acid, 25 degree) 9.2(muaj zog puag) 8.9(me ntsis weaker)
Dej solubility Siab miscible Siab miscible
Log P (octanol / dej) -0.27 (ntau dua hydrophilic) 0.58 (ntau lipophilic)
tsw Me ntses / amine Mild amine, me ntsis pungent
GHS flammability Flam. Liq. 3 ⚠️ Flam. Liq. 3

4. Daim ntawv thov -los ntawm - Daim Ntawv Qhia Xaiv Daim Ntawv Thov 🏭

Qhov sib txawv ntawm lub cev hauv cov lus saum toj no txhais ua qhov zoo sib xws hauv kev siv kawg. Cov ntu hauv qab no taug kev los ntawm plaub qhov chaw thov loj uas DMEA thiab DEAE sib tw ncaj qha.

5. Cov Txheej Txheem Dej: Qhov Kev Txiav Txim Siab Tshaj Plaws 🎨

Neutralizing amine xaiv nyob rau hauv waterborne acrylic thiab epoxy coatings yog ib tug loj tshaj plaws siv rooj sib txawv DMEA los ntawm DEAE, thiab nws yog qhov twg lub boiling point sib txawv tseem ceeb tshaj plaws.

Hauv cov txheej txheem dej hauv dej, cov amine neutralizes carboxyl pawg ntawm cov pob txha pob txha kom tawg cov ntawv khi hauv dej. Thaum lub sij hawm tsim zaj duab xis - los ntawm ambient evaporation los yog ci - cov amine yuav tsum tawm hauv zaj duab xis. Ib qho amine khaws cia hauv cov yeeb yaj kiab kho tau ua qhov chaw ruaj khov hydrophilic, nyiam dej thiab txo cov dej tsis kam (blushing, o, adhesion poob).

✅ DMEA kom zoo dua hauv cov txheej txheem

  • bp qis (135 degree) → ua tiav ntau dua volatilization thaum ci lossis ambient kho
  • Siab dua pKa → sai dua, muaj txiaj ntsig zoo nruab nrab ntawm qis ntxiv
  • Superior dej tsis kam nyob rau hauv cov yeeb yaj kiab kho mob vim qis amine retention
  • Kev lag luam tus qauv rau ambient - kho vaj tse nyob rau hauv cov txheej txheem dej

✅ DEAE siv rooj plaub hauv txheej txheej

  • Siab dua bp (162 degree) → lub lauj kaub zoo dua - lub neej ruaj khov hauv huab cua sov (tsawg amine poob los ntawm lub thawv qhib)
  • me ntsis lipophilic → txhim kho kev sib raug zoo nrog siab -cov khoom los yog hnyav- pab tshuab
  • Qee lub sij hawm siv rau hauv cov txheej txheem ci uas muaj cov amine tshem tawm tag nrho hauv qhov cub
  • Txo cov ntsiab lus ntawm qhov pheej hmoo ntawm qhov sib txawv ntawm DMEA hauv ib puag ncig
💡

Kev pom zoo ntawm kev lag luam:Rau ambient -kho dej acrylic txheej,DMEA yog qhov kev xaiv zoo tshaj plawsnyob rau hauv ntau dua 80% ntawm kev lag luam formulations thoob ntiaj teb. DEAE yog qhov kev xaiv thib ob thaum lub lauj kaub- lub neej hauv huab cua kub yog qhov teeb meem, lossis thaum lub tshuab resin xav tau cov tshuaj nruab nrab tsawg kom tsis txhob muaj teeb meem ntsev.

6. Kev Kho Tus Kheej & Tshuaj pleev ib ce 🧴

Ob leeg DMEA thiab DEAE yog siv los yaug- tawm ntawm cov khoom tu tus kheej li pH adjusters thiab me me alkalizing agents. Lawv cov qauv amine tertiary txhais tau hais tias tsis tuaj yeem tsim nitrosamines raws li EU SCCS kev taw qhia - ib qho tseem ceeb ntawm kev tswj kom zoo dua lwm cov alkanolamines xws li DEA.

Daim ntawv thov DMEA DEAE
Ammonia- dawb oxidative cov plaub hau xim ✅ Nyiam - tsis hnov ​​tsw, zoo cuticle o ⚪ Muaj peev xwm, tsawg dua
Shampoo & conditioner pH hloov ✅ Feem ntau ✅ Feem ntau
Daim tawv nqaij cream / emulsion stabilization ⚪ Siv, tuaj yeem cuam tshuam kev ntxhib los mos ✅ nyiam me ntsis - zoo dua emulsion compatibility vim siab dua log P
Tawm - ntawm cov khoom ⚠️ Ob leeg: siv ceev faj, txheeb xyuas SCCS ua raws li koj cov qauv

7. CO₂ Absorption & Gas Treatment 🏭

Hauv kev lag luam CO₂ txhuam, tsis yog DMEA lossis DEAE feem ntau yog siv los ua cov kuab tshuaj nyob ib leeg - ob leeg yog tertiary amines nrog qeeb nqus kinetics dua MEA lossis DEA. Txawm li cas los xij, ob qho tib si muaj txiaj ntsig zoo liblending Cheebtsamnyob rau hauv sib xyaw amine systems, qhov uas lawv pab txo qis regeneration zog thaum ib tug thawj los yog theem nrab amine muab lub ceev nqus pem hauv ntej.

DMEA hauv kev sib xyaw CO₂ cov kuab tshuaj

DMEA lub hauv paus muaj zog (pKa 9.2) muab nws sai dua proton- hloov kinetics hauv bicarbonate tsim piv rau DEAE. Nws yog feem ntau pom nyob rau hauv blended amine systems rau natural gas sweetening qhov twg lean amine regeneration kub yuav tsum tau khaws cia hauv qab no 120 degree. DMEA qhov qis qis qis kuj txhais tau tias txo qis amine poob rau cov roj kho.

DEAE hauv kev sib xyaw CO₂ cov kuab tshuaj

DEAE qhov kub siab dua thiab qis dua vapor siab txhais tau tias qis dua evaporative poob hauv qhib - voj voog lossis siab - qhov kub thiab txias. Nws lub hauv paus qis me ntsis kuj txo qis kev cuam tshuam sab nraud ntawm qhov kub siab regenerator. DEAE tshwm nyob rau hauv ntau patented blended solvent formulations rau post-combustion capture.

8. Corrosion Inhibition & Boiler Water Treatment 🔧

Qhov no yog ib qho ntawm cov teeb meem clearest qhov twgDEAE nyiam dua DMEA.

Nyob rau hauv chav dej condensate kab tiv thaiv, amine yuav tsum faib nruab nrab ntawm lub vapor theem (steam) thiab cov kua theem (condensate) nyob rau hauv ib txoj kev uas muab alkalinity thoob plaws tag nrho cov condensate rov qab system - suav nrog nyob deb, txias seem ntawm cov yeeb nkab uas muaj feem xyuam rau carbonic acid corrosion (CO₂ dissolving nyob rau hauv condensate).

Vim li cas DEAE yeej hauv kev kho dej boiler

Qhov tseem ceeb parameter yog qhovkev faib tawm(steam/liquid partition coefficient). DEAE muaj qhov zoo sib xws uas tso cai rau nws mus ncig nrog chav mus rau tej thaj chaw deb condensate cov ntsiab lus, neutralizing CO₂ raws nraim qhov nws nyiam tshaj plaws. DMEA, ua rau muaj kev hloov pauv ntau dua, faib ntau dhau mus rau theem vapor thiab tej zaum yuav dhau los ntawm ntu thaum ntxov thaum nyob hauv - tiv thaiv kab nyob deb.

DEAE kuj tseem siv rau hauv kev ua yeeb yaj kiab amine sib xyaw rau saum npoo - tiv thaiv corrosion. Nws cov cim lipophilic me ntsis (log P 0.58 vs −0.27 rau DMEA) txhim kho adsorption mus rau cov hlau.

9. Kev nyab xeeb, kev tswj hwm & kev sib txawv ⚠️

⚠️ DMEA - cov ntawv ceeb toom kev nyab xeeb

  • Flash point 43℃- caisFlam. Liq. 3; tshem tawm qhov hluav taws kub hauv qhov chaw tuav ntau
  • Siab dua vapor siab txhais tau tias ua kom sai dua -vim hluav taws xob vapor hauv qhov chaw kaw
  • Muaj zog amine tsw txawm nyob rau hauv qis concentrations - kom txaus LEV qhov cua
  • Corrosive rau qhov muag ntawm ntau dua concentration; Qhov muag Dam. 1
  • UN 2372, Packing Group III

⚠️ DEAE - cov ntawv ceeb toom kev nyab xeeb

  • Flash point 60℃- tseemFlam. Liq. 3tab sis dav tuav kev nyab xeeb dua li DMEA
  • Tsawg vapor siab txo qhov kev pheej hmoo ntawm kev nqus pa thaum lub sij hawm tuav ambient
  • Daim tawv nqaij Irrit. 2, Qhov muag Dam. 1 - yuav tsum muaj nitrile hnab looj tes thiab daim npog ntsej muag
  • Me ntsis siab dua qhov ncauj toxicity tshaj DMEA (LD₅₀ nas ~ 1.4 g / kg vs ~ 2.0 g / kg rau DMEA)
  • UN 2726, Packing Group III
Cov khoom tswj hwm DMEA DEAE
EU REACH xwm txheej Sau npe Sau npe
Tuam Tshoj GB kev phom sij Chav Kawm 3.3 flammable kua Chav Kawm 3.3 flammable kua
TSCA (US) status Nyob rau hauv cov ntaub ntawv active Nyob rau hauv cov ntaub ntawv active
Tshuaj pleev ib ce (EU): tawm -rau Tshawb xyuas nrog SCCS kev xav Tshawb xyuas nrog SCCS kev xav

10. Cov lus nug uas nquag nug ❓

Q: Kuv puas tuaj yeem hloov DEAE rau DMEA hauv kuv cov txheej txheem dej tsis muaj kev hloov kho?

Tsis ncaj qha - 1: 1 qhov hnyav hloov pauv yuav ua rau koj muaj kev daws teeb meem tsawg dua (pKa 8.9 vs 9.2) thiab siab dua amine retention nyob rau hauv cov yeeb yaj kiab kho tau (ntau dua qhov kub siab). Koj yuav xav tau nce qib ntxiv los ntawm 5-10% kom ua tiav tib lub pH, thiab kev ntsuas dej tsis kam ntawm cov yeeb yaj kiab kho yuav tsum rov ua dua. Hauv cov txheej txheej txheej txheej txheej txheej, qhov cuam tshuam tsis tshua muaj qhov tseem ceeb, vim tias qhov cub kub siab tshaj ob lub ntsiab lus kub.

Q: Qhov twg yog tus nqi ntau dua -zoo - DMEA lossis DEAE?

DMEA feem ntau qis dua ntawm tus nqi ib kilogram thiab qis dua tus nqi ib mole ntawm amine functionality, vim nws qhov hnyav molecular yog 24% qis dua DEAE. Rau cov ntawv thov uas xav tau qhov sib npaug molar dosing (xws li resin neutralization), DMEA feem ntau xa cov nqi zoo dua -hauv- siv. DEAE nqa tus nqi qis uas qhia txog nws qhov kev sib txuas ntau dua thiab cov ntim khoom me me.

Q: Puas yog DMEA thiab DEAE suav tias yog VOCs raws li EU lossis US cov cai?

Raws li EU Cov Lus Qhia 2004/42/CE thiab US EPA txhais, ob qho tib si DMEA thiab DEAE ua tau raws li qhov ntsuas kub kub rau VOC kev faib tawm (<250 °C at 1 atm). However, some regional regulatory frameworks (e.g., CARB in California) apply reactivity-based exemptions. Formulators in VOC-regulated markets should verify the status of their specific application category with the relevant authority. AMP-95 is a common DMEA alternative where VOC exemption is required.

Q: DMEA lossis DEAE puas tuaj yeem siv rau hauv cov zaub mov-cov ntawv thov hu rau?

Tsis yog DMEA lossis DEAE tsis tau teev npe raws li cov khoom noj uas tau tso cai los yog zaub mov- tiv tauj cov khoom siv raws li EU Txoj Cai (EC) No 1935/2004 lossis US FDA 21 CFR rau kev sib cuag cov zaub mov ncaj qha. Rau cov coatings lossis ntim khoom npaj rau kev sib cuag zaub mov, AMP, TEA, lossis tshwj xeeb pom zoo amines yuav tsum tau siv. Nco ntsoov sab laj nrog cov cai tswj kev nyab xeeb khoom noj ua ntej siv.

Q: Lub txee lub neej ntawm DMEA thiab DEAE yog dab tsi, thiab yuav tsum khaws lawv li cas?

Ob lub tebchaw ruaj khov rau 24 lub hlis thaum khaws cia rau hauv cov thawv kaw ntom ntom kom deb ntawm CO₂ (uas yuav tsim cov ntsev carbonate thaum lub sijhawm), cov kua qaub muaj zog, thiab cov tshuaj oxidizing. Cov ntaub ntawv pom zoo: stainless hlau 304/316, HDPE, lossis cov pa roj carbon steel. DMEA yuav tsum khaws cia qis dua 30℃muab nws qhov qis qis thiab siab dua vapor siab. Ob leeg yuav tsum tau khaws cia kom deb ntawm cov nplaim taws thiab qhov chaw ntawm cov hluav taws xob zoo li qub thaum lub sijhawm hloov chaw.

🔗 Cov nplooj ntawv ntsig txog cov khoom lag luam

Dimethylethanolamine (DMEA)

CAS 108-01-0 · bp 135℃· pKa 9.2

Diethylethylamine (DEAE)

CAS 100-37-8 · bp 162℃· pKa 8.9

Thov cov qauv los yog ntau tus nqi

Tham nrog Sinolook Chemical

Peb muab ob qho tib si DMEA thiab DEAE hauv cov khoom lag luam nrog SGS -kuaj CoA, cov ntaub ntawv kev tshaj lij, thiab cov khoom xa tawm yooj yim (IBC, nruas, ISO tank). Qauv thov txais tos.

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