Ilana iṣelọpọ ti iṣuu soda carboxymethylcellulose

Ilana iṣelọpọ ti iṣuu soda carboxymethylcellulose (CMC) jẹ awọn igbesẹ pupọ, pẹlu igbaradi ti cellulose, etherification, ìwẹnumọ, ati gbigbe.Eyi ni awotẹlẹ ti ilana iṣelọpọ aṣoju:

1. Igbaradi ti Cellulose: Ilana naa bẹrẹ pẹlu igbaradi ti cellulose, eyiti o jẹ deede lati inu igi ti ko nira tabi awọn linters owu.Cellulose ti wa ni mimọ akọkọ ati ki o tunmọ lati yọ awọn aimọ gẹgẹbi lignin, hemicellulose, ati awọn idoti miiran kuro.Cellulose mimọ yii n ṣiṣẹ bi ohun elo ibẹrẹ fun iṣelọpọ CMC.
2. Alkalization: Cellulose ti a sọ di mimọ lẹhinna ni itọju pẹlu ojutu ipilẹ, nigbagbogbo sodium hydroxide (NaOH), lati mu ifaseyin rẹ pọ si ati dẹrọ iṣesi etherification ti o tẹle.Alkalization tun ṣe iranlọwọ lati wú ati ṣii awọn okun cellulose, ṣiṣe wọn diẹ sii si iyipada kemikali.
3. Idahun Etherification: cellulose alkalized ti ṣe atunṣe pẹlu monochloroacetic acid (MCA) tabi iyọ iṣuu soda rẹ, sodium monochloroacetate (SMCA), ni iwaju ayase labẹ awọn ipo iṣakoso.Idahun etherification yii jẹ pẹlu iyipada awọn ẹgbẹ hydroxyl lori awọn ẹwọn cellulose pẹlu awọn ẹgbẹ carboxymethyl (-CH2COONa).Iwọn aropo (DS), eyiti o ṣe aṣoju nọmba apapọ ti awọn ẹgbẹ carboxymethyl fun ẹyọ glukosi ti pq cellulose, le jẹ iṣakoso nipasẹ ṣiṣatunṣe awọn aye ifasẹyin gẹgẹbi iwọn otutu, akoko ifọkansi, ati awọn ifọkansi ifọkansi.
4. Neutralization: Lẹhin iṣesi etherification, ọja ti o yọrisi jẹ didoju lati ṣe iyipada eyikeyi awọn ẹgbẹ ekikan ti o ku si fọọmu iyọ iṣuu soda wọn (carboxymethylcellulose sodium).Eyi ni igbagbogbo waye nipasẹ fifi ojutu ipilẹ kan kun, gẹgẹbi sodium hydroxide (NaOH), si adalu ifaseyin.Neutralization tun ṣe iranlọwọ lati ṣatunṣe pH ti ojutu ati iduroṣinṣin ọja CMC.
5. Iwẹnumọ: iṣuu soda carboxymethylcellulose ti robi lẹhinna jẹ mimọ lati yọkuro awọn aimọ, awọn reagents ti ko dahun, ati awọn ọja-ọja lati inu idapọ iṣesi.Awọn ọna ìwẹnumọ le pẹlu fifọ, sisẹ, centrifugation, ati gbigbe.CMC ti a sọ di mimọ jẹ igbagbogbo fo pẹlu omi lati yọkuro alkali ati iyọ, atẹle nipa sisẹ tabi centrifugation lati ya ọja CMC to lagbara kuro ninu ipele omi.
6. Gbigbe: iṣuu soda carboxymethylcellulose ti a sọ di mimọ ti gbẹ nikẹhin lati yọ ọrinrin pupọ kuro ati gba akoonu ọrinrin ti o fẹ fun ibi ipamọ ati sisẹ siwaju sii.Awọn ọna gbigbe le pẹlu gbigbẹ afẹfẹ, gbigbe sokiri, tabi gbigbe ilu, da lori awọn abuda ọja ti o fẹ ati iwọn iṣelọpọ.

Abajade iṣuu soda carboxymethylcellulose ọja jẹ funfun si pa-funfun lulú tabi ohun elo granular pẹlu solubility omi ti o dara julọ ati awọn ohun-ini rheological.O ti wa ni lilo pupọ bi oluranlowo ti o nipọn, imuduro, dinder, ati iyipada rheology ni ọpọlọpọ awọn ile-iṣẹ, pẹlu ounjẹ, awọn oogun, awọn ohun ikunra, awọn aṣọ, ati awọn ohun elo ile-iṣẹ.