Naphthalene Sulfonate Water Reducer

Naphthalene sulfonate dej reducer

--Los ntawm Baidu Encyclopedia

Nws yog qhov ntxov tshaj plaws siv hauv kuv lub tebchaws. Nws yog cov khoom ntawm sulfonation ntawm naphthalene los ntawm sulfuric acid thiab condensation nrog formaldehyde. Nws yog ib qho anionic surfactant. Cov tsos ntawm hom dej no txo ​​tus neeg sawv cev tuaj yeem yog lub teeb daj mus rau tsaus xim av hmoov nyob ntawm cov khoom. Nws yog yooj yim soluble nyob rau hauv dej thiab muaj ib tug zoo dispersing nyhuv ntawm ntau cov ntaub ntawv hmoov xws li cov cement, nrog rau cov dej txo tus nqi ntawm 25 feem pua.

Kev npaj:

Txoj kev hluavtaws ntawm naphthalene sulfonate dej txo tus neeg sawv cev yog raws li nram no: naphthalene → sulfonation → hydrolysis → condensation → neutralization → pom → ziab → khoom

Cov khoom siv raw rau kev tsim khoom yog naphthalene, thawj zaug, cov tshuaj tiv thaiv sulfonation yog nqa tawm nrog cov concentrated sulfuric acid, thiab molar ratio ntawm naphthalene thiab sulfuric acid yog 1: 1.3-1.4. Qhov kub thiab txias yog 160-165 degree, thiab lub sij hawm tshuaj tiv thaiv yog 3h. Tom qab ntawd cov reactant tau txias rau 120 degree rau hydrolysis, lub sijhawm no 13-naphthalenesulfonic acid tau ruaj khov, thaum d-naphthalenesulfonic acid tau yooj yim hydrolyzed, yog li txo tus nqi ntawm b-naphthalenesulfonic acid, uas yog muaj txiaj ntsig zoo rau cov tshuaj tiv thaiv polycondensation tom ntej, thiab lub sijhawm hydrolysis Txog 30min. Cov tshuaj tiv thaiv condensation yog ib qho tseem ceeb hauv kev tsim cov txheej txheem ntawm b-naphthalene sulfonate dej reducer. Ntawm qhov kub thiab txias, sulfonated naphthalene thiab formaldehyde yog condensed los ua ib qho polymer compound. Cov kauj ruam no cuam tshuam rau kev ua haujlwm ntawm cov khoom. Txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm rau txhawm Qhov zoo ntawm qhov kub thiab txias yog 104 degree; qhov zoo tshaj plaws ntawm cov tshuaj tiv thaiv lub sij hawm yog 6h; qhov zoo tshaj plaws ntawm formaldehyde ntau npaum yog 0.75; qhov siab tshaj plaws kev xav theoretical tus nqi yog 18.3.

Industrial ntau lawm txheej txheem:

(1) Naphthalene: Naphthalene yog khoom nyob rau hauv chav tsev kub, thiab nws yuav tsum muab naphthalene rau hauv ib tug naphthalene 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 naphthalenesulfonic acid. Muaj ob hom naphthalene sulfonic acid: -naphthalene sulfonic acid thiab -naphthalene sulfonic acid.

(3) Hydrolysis: Txij li thaum -naphthalene sulfonic acid yog tsim nyob rau hauv sulfonation cov tshuaj tiv thaiv, nws lub neej tsis yog conducive rau condensation cov tshuaj tiv thaiv, yog li nws yog tsim nyog los ntxiv dej rau hydrolyze -naphthalene sulfonic acid.

(4) Condensation: Tom qab cov tshuaj tiv thaiv hydrolysis tiav lawm, formaldehyde yog ntxiv dropwise rau condensation kettle kom hnov ​​​​mob nrog -naphthalenesulfonic acid los tsim ib tug naphthalene-raws li sulfonated formaldehyde condensate.

(5) Neutralization: Cov khoom siv condensed nkag mus rau hauv lub qhov hluav taws xob neutralization, thiab kua caustic soda yog ntxiv dropwise kom tsis txhob muaj cov sulfuric acid ntau dhau hauv cov tshuaj tiv thaiv sulfonation, thiab cov tshuaj dropwise ntxiv yog nres thaum pH nce mus txog 7-9.

Lub kaw lus tswj feem ntau saib xyuas cov xwm txheej tsim tawm ntawm plaub lub reactors sib txawv thiab lawv cov batching tso tsheb hlau luam, thiab cov kab ntau lawm tuaj yeem nqa plaub kab ntau lawm 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 reactor muaj ib tug pub valve, ib tug paug valve, ib tug ntws valve, ib tug kub roj valve, ib tug txias dej valve, ib tug chav siab valve, ib chav dej flush valve, thiab lwm yam. kettle kuj tau nruab nrog lub tank raw khoom. 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 neutralizing. Cov kua caustic dej qab zib tau ntxiv dropwise rau lub kettle.

Daim ntawv thov xwm txheej:

Naphthalene-raws li superplasticizer yog ib qho kev sib xyaw ua ke tsim los ntawm Dr. Kenichi Hattori los ntawm Nyiv xyoo 1962. Nws yog cov khoom siv tshuaj lom neeg ntawm naphthalenesulfonic acid-formaldehyde condensate. Nws siv cov naphthalene, concentrated sulfuric acid, formaldehyde thiab alkali ua cov ntaub ntawv tseem ceeb. Ntxiv naphthalene-raws li dej-txo tus neeg sawv cev rau pob zeb yuav tsis tsuas yog txhim kho 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 tus neeg saib xyuas yog dav siv nyob rau hauv txoj kev loj, txuas hniav, tunnels, docks, civil siv thiab lwm yam lag luam.