Isocyanic Acid Kub Muag 75-13-8

1. Taw qhia

Ib qho ntawm ntau yam esters ntawm Isocyanic acid. Cov tebchaw tseem ceeb tshaj yog alkyl monoisocyanate, (hloov) phenyl monoisocyanate, a-hloov isocyanate, thiab polyisocyanate vinegar. Feem ntau yog toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), isophorone diisocyanate (IPDI), polymethylene polyphenyl polyisocyanate (PAPI) thiab hexamethylene diisocyanate (HDI). Vim tias lawv cov yam ntxwv sib txawv, lawv tau siv dav hauv kev npaj cov tshuaj tiv thaiv cov nroj tsuag, tshuaj tua kab, tshuaj tua kab mob, cog kev loj hlob regulators thiab tshuaj antineoplastic. Lawv cov polymers tuaj yeem siv los tsim cov pigments, resins, textile hydrophobic agents, plastics, detergents, foams, elastomers, binders thiab coatings.

2. Muaj nuj nqi

2.1 Nws yog ib qho tseem ceeb nruab nrab ntawm cov organic synthesis, uas tuaj yeem ua rau hauv cov kab carbamate insecticides, fungicides thiab herbicides, thiab tseem tuaj yeem siv los txhim kho cov dej tsis kam ntawm plastics, fabrics, tawv thiab lwm yam. Cov pab pawg ua haujlwm tsis zoo thiab cov isocyanates saum toj no tuaj yeem siv los ua ke ntawm cov polyurethane foams, roj hmab, elastic fibers, coatings, adhesives, hluavtaws tawv, ntoo dag thiab lwm yam.'

3. Daim ntawv thov

Cov khoom siv tseem ceeb hauv tsev, tsheb, kev tsim kho, khau, rooj tog zaum, adhesives thiab lwm yam lag luam.

4.Specification

5.Flow chart

6. Kev xeem

Txoj kev txiav txim kom muaj nuj nqis muaj xws li txoj kev gravimetric (qhuav txoj kev) thiab volumetric method (wt method). Lub hauv paus ntsiab lus ntawm ob txoj kev yog ua raws li cov tshuaj tiv thaiv ntawm thawj amine thiab theem nrab amine nrog isocyanate los tsim cov urea sib raug, thiab cov tshuaj tiv thaiv yog nqa tawm ntau nyob rau hauv cov xwm txheej ntawm amine ntau dhau. Qhov sib txawv ntawm ob txoj kev yog txoj kev gravimetric cais cov urea thiab suav cov ntsiab lus raws li nws qhov hnyav (feem ntau hu ua txoj kev qhuav); txoj kev volumetric siv cov txheej txheem hydrochloric acid tov kom rov qab cov amine ntau dhau thiab suav cov ntsiab lus raws li kev noj cov tshuaj hydrochloric acid. Tus qub yog tsis tshua siv vim nws cov kauj ruam tsom xam nyuaj thiab qeeb tsom xam ceev. Tam sim no, kev txiav txim siab ntau ntawm isocyanate feem ntau yog hais txog txoj kev ntim ntim (feem ntau hu ua txoj kev ntub dej). Cov txheej txheem yog ua raws li cov tshuaj tiv thaiv acid-base. Yog tias tus qauv muaj cov alkali dawb, nws yuav tsum raug kho. Lub ntsiab lus teb yog raws li nram no.

Los yog

Tshaj amine reacts nrog hydrochloric acid los tsim cov organic amine hydrochloride

Raws li tus neeg pub hydrogen reacting nrog isocyanate, kev xaiv ntawm amine muaj kev cuam tshuam zoo rau kev soj ntsuam cov txiaj ntsig, thiab cov tshuaj tiv thaiv yuav tsum ceev.

Thiab nyuaj ua si amines, xws li di-n-butylamine, piperidine (feem ntau hu ua hexahydropyridine), thaum muaj ntxhiab amines thiab cov saw ntev aliphatic amines.

Nws yuav tsum tau qeeb. Yuav hnov ​​​​mob nrog dej thiab cawv, xaiv cov kuab tshuaj uas tsis yog-polar xws li toluene lossis chlorobenzene, trichlorobenzene, thiab lwm yam, thiab.

Lub cev qhuav dej yuav tsum tau ua ua ntej siv. Bromophenol xiav lossis bromocresol ntsuab raug xaiv los ua qhov taw qhia. Kev txiav txim siab ntawm cov ntsiab lus rau cov chaw tsim khoom thiab cov tshuab.

Lub Hoobkas cov khoom lag luam yog cov lus qhia tseem ceeb tshaj plaws ntawm kev tswj hwm kev tsim khoom, vim tias nws tuaj yeem tau txais cov pa phem ntawm cov dej thiab cov impurities hauv cov txheej txheem ntawm kev tsim khoom, khaws cia thiab kev thauj mus los, ua rau cov ntsiab lus txo qis, yog li nws yuav tsum tau ua cov ntsiab lus tsom xam los muab cov khoom lag luam. lub hauv paus rau qhov tseeb cov qauv formic acid. Cov kauj ruam txiav txim yog raws li nram no.

1. Kev npaj reagent.
(1) 2mol/L di-n-butylamine (fumigated anhydrous) toluene (anhydrous) los yog chlorobenzene (anhydrous chlorobenzene qhuav nrog calcium chloride) tov.
(2) 0.5mol/L hydrochloric acid standard tov (kev npaj thiab calibration raws li niaj hnub tshuaj ntsuam xyuas).
(3) 0.1 feem pua ​​​​bromocresol ntsuab isopropanol (los yog methanol) tov; Yog tias bromophenol xiav raug xaiv los ua qhov taw qhia, 0.1 g bromophenol xiav yog thawj zaug kawm nrog NaOH aqueous tov ntawm 1.5mL 1mol / L, thiab 100ml yog diluted nrog dej.

Kev tshuaj ntsuam xyuas.

Ua kom hnyav cov qauv ua kua ntawm 2.5-3.5 cov qauv isocyanate tuaj yeem kuaj los ntawm ampere pob) hauv lub raj mis conical ntawm 250ml specification, yaj 10ml toluene, ntsuas 20ml di-n-butylamine tov nrog pipette, co kom sib tov sib npaug, tom qab tso 15-30min ntawm chav tsev kub, ntxiv 70-100ml anhydrous isopropanol (methanol los yog isopropanol) kom dilute cov qauv. Tom qab ntawd titrate nrog 0.5mol / L hydrochloric acid standard tov kom txog rau thaum cov tshuaj hloov los ntawm xiav mus rau daj rau 15 vib nas this thiab tsis ploj li cov tshuaj tiv thaiv kawg taw tes. Ua ib qho kev sim dawb nrog tib txoj kev

Cov txiaj ntsig suav

V dawb paug - tus qauv ntim ntawm hydrochloric acid noj nyob rau hauv qhov kev sim dawb paug.
V qauv - tus qauv tov ntim ntawm hydrochloric acid noj los ntawm tus qauv.
Feem ntau, hauv kev ua kom zoo, cov ntsiab lus ntawm hydrolyzed chlorine tsawg dua {{0}}.001 feem pua ​​muri 0.01 feem pua ​​. Cov txiaj ntsig kev soj ntsuam ntawm txoj kev no tsis tas yuav raug kho. Cov ntsiab lus hydrolyzed chlorine ntawm cov khoom nyoos yog siab li 0.05 feem pua. Cov txiaj ntsig kev soj ntsuam yuav tsum raug kho.

7. HPLC

8. Kev ruaj ntseg thiab kev nyab xeeb

Peb tau ua ntau yam kev ruaj ntseg thiab kev nyab xeeb kawm txog cov khoom no, raws li cov ntaub ntawv ceev ceev thiab kev ruaj ntseg mus sij hawm ntev, nws qhia cov yam ntxwv ruaj khov; raws li kev tshawb nrhiav tsiaj txhu, nws qhia tau tias muaj kev nyab xeeb.

9. Daim ntawv pov thawj

10. Exhibition

11. Peb Cov Neeg Siv Khoom

Peb tau tsim kev lag luam kev sib raug zoo nrog Abbott, Unilever, Shiseido, KANS thiab SIMM, thiab lwm yam.

12.Cov neeg siv kev tshuaj xyuas

Cim npe nrov: Isocyanic Acid Kub Muag 75-13-8, tuam ntxhab, lwm tus muag khoom, Hoobkas, lag luam wholesale, yuav, nqe, zoo tshaj plaws, ntau, kev muag khoom