labarai

Ainihin, tsarin amsawar duk carbohydrates da aka haɗa ta Fischer tare da alkyl glycosides na iya rage zuwa bambance-bambancen tsari guda biyu, wato, kira kai tsaye da transacetalization. A cikin duka biyun, halayen na iya ci gaba a cikin batches ko ci gaba.
Ƙarƙashin haɗin kai tsaye, carbohydrate yana amsawa kai tsaye tare da barasa mai kitse don samar da dogon sarkar alkyl polyglycoside da ake buƙata. Carbohydrates da aka yi amfani da su sau da yawa ana bushewa kafin ainihin abin da ya faru (misali don cire ruwan kristal idan akwai glucose monohydrate = dextrose). Wannan matakin bushewa yana rage girman halayen da ke faruwa a gaban ruwa.
A cikin haɗin kai kai tsaye, nau'in glucose mai ƙarfi na monomer ana amfani dashi azaman mai ƙarfi mai ƙarfi.Tunda amsawar shine rashin daidaituwa mai ƙarfi / ruwa, dole ne a dakatar da ƙarfi gaba ɗaya a cikin barasa.
Glucose syrup ɗin da aka ƙasƙantar da shi sosai (DE>96; DE = Dextrose daidai) na iya amsawa a cikin ingantaccen haɗin kai tsaye. Yin amfani da sauran ƙarfi na biyu da/ko emulsifiers (misali alkyl polyglycoside) yana ba da kwanciyar hankali mai tsauri tsakanin barasa da syrup syrup.
Tsarin transacetalization na matakai biyu yana buƙatar ƙarin kayan aiki fiye da haɗin kai tsaye. A mataki na farko, carbohydrate yana amsawa tare da gajeriyar sarkar barasa (misali n-butanol ko propylene glycol) da zaɓin tura-menzes. A mataki na biyu, gajeriyar sarkar alkyl glycoside an canza shi tare da barasa mai tsayi mai tsayi don samar da alkyl polyglycoside da ake buƙata. Idan molar rabo na carbohydrate zuwa barasa iri ɗaya ne, rarraba oligomer da aka samu a cikin tsarin transacetalization shine ainihin daidai da wanda aka samu a cikin haɗin kai tsaye.
Idan an yi amfani da oligo-da polyglycoses (misali sitaci, syrups tare da ƙarancin darajar DE), ana amfani da tsarin transacetalization. Abubuwan da ake buƙata na depolymerization na waɗannan kayan farawa suna buƙatar yanayin zafi na> 140 ℃. Ya dogara ne akan barasa da aka yi amfani da shi, wannan na iya haifar da matsi mafi girma daidai wanda ke sanya ƙarin buƙatu akan kayan aiki kuma yana iya haifar da tsadar shuka. Gabaɗaya, a daidai wannan ƙarfin, samar da tsarin transacetalization ya fi girma fiye da haɗin kai tsaye. baya ga matakan amsawa guda biyu, dole ne a samar da ƙarin wuraren ajiya, da kuma wuraren aiki na zaɓi don ƙananan sarkar giya. Saboda ƙazanta na musamman a cikin sitaci (kamar sunadaran sunadarai), alkyl glycosides dole ne su sami ƙarin ko ingantaccen tacewa. A cikin sauƙaƙe tsarin transacetalization, syrups tare da babban abun ciki na glucose (DE> 96%) ko nau'in nau'in glucose mai ƙarfi na iya amsawa tare da gajeriyar sarkar giya a ƙarƙashin matsa lamba na al'ada, an haɓaka matakan ci gaba akan wannan. (Hoto na 3 yana nuna duka hanyoyin haɗin gwiwa don alkyl polyglycosides)
Hoto 3. Alkyl polyglycoside surfactants-hanyoyin haɗin masana'antu


Lokacin aikawa: Satumba-29-2020