Dej txo tus neeg saib xyuas kev lag luam ntau lawm

(1) Naphthalene: Naphthalene yog khoom nyob rau hauv chav tsev kub, thiab nws yuav tsum tau muab tso rau hauv lub naphthalene tshuaj kettle rau cua sov thiab melting.
(2) Sulfonation: Cov txheej txheem sulfonation yog ntxiv cov concentrated sulfuric acid rau sulfonation kettle kom hnov ​​​​mob nrog nws los tsim naphthalene sulfonic acid. Muaj ob hom naphthalenesulfonic acid: -naphthalenesulfonic acid thiab -naphthalenesulfonic acid.
(3) Hydrolysis: Txij li thaum -naphthalenesulfonic acid yog tsim thaum lub sij hawm sulfonation cov tshuaj tiv thaiv, nws lub xub ntiag tsis haum rau cov condensation cov tshuaj tiv thaiv, yog li dej yuav tsum tau ntxiv rau hydrolyze -naphthalenesulfonic acid.
(4) Condensation: Tom qab cov tshuaj tiv thaiv hydrolysis tiav lawm, formaldehyde yog ntxiv dropwise mus rau condensation kettle, thiab reacts nrog -naphthalene sulfonic acid los ua ib tug naphthalene-raws li sulfonated formaldehyde condensate.
(5) Neutralization: Cov khoom tom qab condensation nkag mus rau hauv lub neutralization kettle, thiab kua caustic soda yog ntxiv dropwise rau neutralize cov sulfuric acid nyob rau hauv sulfonation cov tshuaj tiv thaiv. Tso tseg thaum pH nce mus txog 7-9.
Qhov kev tswj hwm no tsuas yog saib xyuas cov xwm txheej tsim tawm ntawm plaub qhov sib txawv cov tshuaj tiv thaiv kettles thiab lawv cov batching tso tsheb hlau luam. Cov kab ntau lawm tuaj yeem nqa tawm 4 kab ntawm kev tsim khoom tib lub sijhawm. Siv cov kab ntau lawm A ua piv txwv, muaj ib qho naphthalene reactor thiab ob lub sulfonation reactors. , plaub condensation kettles thiab ib tug neutralization kettle. Txhua lub tshuab hluav taws xob muaj lub valve pub, lub qhov tso tawm, lub valve khiav tawm, roj kub pub valve, dej txias valve, lub zog siab valve, lub tshuab nqus tsev vacuum, thiab lwm yam. raw khoom tank. Ob tug sulfonation kettles muab ib lub tank sulfuric acid. Txhua ob lub kais dej yog nruab nrog ib txheej ntawm formaldehyde tso tsheb hlau luam thiab dilution dej tso tsheb hlau luam. Txhua lub kwj dej condensation muaj lub tank dej hydrolysis, thiab cov kua alkali tank yog lub luag haujlwm rau neutralization. Ua kua caustic soda yog ntxiv dropwise rau hauv lub kettle. Cov txheej txheem tshwj xeeb khiav daim ntawv qhia tau pom hauv daim duab.
Daim ntawv thov xwm txheej:
Naphthalene-raws li dej txo tus neeg sawv cev yog cov khoom siv ntxiv tsim los ntawm Dr. Kenichi Hattori ntawm Nyiv xyoo 1962. Nws yog cov khoom siv tshuaj lom neeg ntawm naphthalene sulfonate formaldehyde condensate, siv cov naphthalene, concentrated sulfuric acid, formaldehyde thiab alkali ua cov ntaub ntawv tseem ceeb. Ntxiv naphthalene-raws li dej-txo cov neeg ua hauj lwm rau cov pob zeb yuav tsis tsuas yog ua kom lub zog ntawm cov pob zeb, tab sis kuj txhim kho nws ntau yam khoom, xws li kev puas tsuaj, corrosion resistance, permeability kuj, thiab lwm yam. Yog li ntawd, naphthalene-raws li dej-txo cov neeg ua hauj yog dav siv nyob rau hauv txoj kev loj, txuas hniav, tunnels, docks, civil siv thiab lwm yam lag luam.