Polyacrylamide siam chhuahna step te hi step hnih a ni a, chungte chu:
Monomer Production Technology: Acrylamide monomer siam chhuah hian acrylonitrile hi raw material atan hman a ni a, catalyst hnathawh hnuaiah hydrated a ni a, chu chuan acrylamide monomer crude product a siam chhuak thin. Flash evaporation leh refining hnuah refined acrylamide monomer a awm a. He monomer hi polyacrylamide siamna atana raw material a ni.
Acrylonitrile + (Tui Catalyst/Tui) → Synthesis → Crude Acrylamide → Flash Evaporation → Refining → Acrylamide tihthianghlim.
Catalysts hmasawnna chanchin ang chuan monomer technology hian thlah thum a paltlang tawh a:
A thlah khatna chu sulphuric acid catalytic hydration technology a ni. He technology chhiatna chu acrylonitrile conversion rate hniam, acrylamide product yield hniam leh low by-products a ni a, hei hian refining-ah phurrit lian tak a thlen a ni. Chu bakah, catalyst sulphuric acid-in a tihchhiat nasat em avangin hmanrua man a to hle a, hei hian a siam chhuah man a tisang a A thlah hnihna chu binary emaw ternary emaw skeleton copper catalytic production technology a ni. He technology chhiatna chu polymerization nghawng thei metal copper ion te chu final product-ah an rawn luh tir a, chu chuan post-processing refining man a tisang a A thlah thumna chu microbial nitrile hydratase catalytic production technology a ni. He technology hian reaction condition a nei tlem hle a, room temperature leh pressure-ah a thawk a ni. Selectivity sang, yield sang leh activity sang tak characteristic a nei a ni. Acrylonitrile conversion rate chu 100% a tling thei a, reaction chu a zo tawh a, -product leh impurities te chu a awm lo. Product acrylamide hian metal copper ion a nei lo va, a siam chhuah chhunga copper ion siam chhuah te chu paih chhuah nan ion exchange a ngai lo va, chu chuan process flow a ti awlsam hle. Tin, gas chromatography analysis atanga a lan dan chuan acrylamide product hian free acrylonitrile a nei lo tluk a ni a, a thianghlimna sang tak a nei a, hei hi ultra-high relative molecular mass polyacrylamide leh non-toxic polyacrylamide te ei leh in industry-in a mamawh tur siamna atan a tha hle.
Microbial catalytic acrylamide monomer production technology hi Japan chuan kum 1985 khan an siam hmasa ber a, chutah chuan 6,000 t/a acrylamide plant an siam a ni. Russia pawhin he technology hi a hnuah a thiam hle bawk. Kum 1990 chhoah khan Japan leh Russia chuan a hnungzuiin 10,000-ton microbial catalytic acrylamide plant an siam a. Ka ram hi khawvela Japan leh Russia hnua he technology nei ram pathumna a ni. Microbial catalyst hnathawh hi international biochemical unit 2857 a ni a, international level a thleng tawh a ni. Ka ram microbial catalytic acrylamide monomer production technology hi Shanghai Pesticide Research Institute chuan kum nga chhunga ruahmanna pathum hmangin an siam a, chungte chu "Seventh Five{{14} kum plan", "Eighthth Five-year plan" leh "kum panga{21} kum tin ruahmanna" te an ni. Microbial catalyst nitrile hydratase chu kum 1990 khan screening an nei a, chu chu mount tai hnuai lama lei atanga strain 163 lakchhuah leh Wuxi-a lei atanga strain 145 lakchhuah atanga lak chhuah a ni. Nitrile hydratase chu code-Norcardia-163 tia vuah a ni. He technology hi Rugao, Jiangsu, Nanchang, Jiangxi, Shengli Oilfield leh Wanquan, Hebei-ah te siam chhuah a ni a, quality tha tak neiin, ultra-high relative mass polyacrylamide siam chhuahna tur quality indicator a thleng a ni. Ka ram microbial catalytic acrylamide technology chuan international advanced level a thleng tawh tih a tilang a ni.
Polymerization Technology: Polyacrylamide siamchhuahna hian acrylamide aqueous solution chu raw material atan a hmang a, initiator hnathawh hnuaiah polymerization reaction a keng tel bawk. Reaction an tih zawh hnuah polyacrylamide block siam chhuah chu an tan a, granulated, dried leh crushed a ni a, a tawpah chuan polyacrylamide product chu an hmu ta a ni. A pawimawh ber chu polymerization reaction a ni. A hnua processing process-ah chuan polyacrylamide-a relative molecular mass leh water solubility awm theihna turin mechanical cooling, thermal degradation leh cross-linking te ngaihven a ngai a ni.
