Cov tshuaj formula: Na5P3O10
Molecular Luj: 367.86
Khoom: Dawb hmoov los yog granules, yooj yim soluble hauv dej. Raws li daim ntawv thov thiab kev ua haujlwm, peb tuaj yeem muab cov khoom lag luam ntawm ntau yam tshwj xeeb xws li qhov pom tseeb sib txawv (0.5-0.9g / cm3), sib txawv solubilities (10g, 20g / 100ml dej), instant sodium tripolyphosphate, loj-particle sodium tripolyphosphate, lwm.
Kev siv:
1.Nyob rau hauv kev lag luam khoom noj khoom haus, nws yog tsuas yog siv los ua ib qho kev txhim kho zoo rau cov khoom noj hauv kaus poom, cov khoom noj siv mis, cov kua txiv hmab txiv ntoo thiab cov kua mis; ib tug dej retainer thiab tenderizer rau nqaij cov khoom xws li nqaij npua thiab noj su; nws tuaj yeem khaws dej, sib tw, nthuav dav thiab tshuaj dawb hauv kev ua cov khoom hauv dej; nws tuaj yeem ua rau cov tawv nqaij ntawm cov taum dav hauv cov kaus poom dav taum; Nws kuj tseem tuaj yeem siv los ua dej softener, chelate agent, PH regulator thiab thickener, nrog rau hauv kev lag luam npias.
2. Nyob rau hauv kev lag luam teb, nws yog dav siv nyob rau hauv detergents raws li ib tug auxiliary agent, xab npum synergist thiab tiv thaiv bar xab npum los ntawm crystallizing thiab blooming, muaj dej softener, tawv pretanning tus neeg saib xyuas, dyeing auxiliary, roj zoo av nkos tswj tus neeg saib xyuas, roj paug tiv thaiv. tus neeg sawv cev rau papermaking, zoo dispersant rau kev kho mob ntawm kev ncua xws li xim, kaolin, magnesium oxide, calcium carbonate, thiab lwm yam., thiab ceramic degumming tus neeg saib xyuas thiab dej reducer hauv kev lag luam ceramic.
Txoj kev npaj ib txwm siv ntawm sodium polyphosphate yog kom tsis txhob kub phosphoric acid nrog ib feem ntawm 75% H3PO4 nrog cov dej qab zib tshauv tshem tawm kom tau txais cov slurry neutralized nrog Na / P piv ntawm 5: 3, thiab ua kom sov ntawm 70 ℃ ~ 90 ℃; Tom qab ntawd txau cov slurry tau txais mus rau hauv lub qhov cub polymerization rau lub cev qhuav dej ntawm qhov kub thiab txias, thiab condense rau hauv sodium tripolyphosphate ntawm txog 400 ℃. Cov txheej txheem no tsis tsuas yog yuav tsum tau kub kub phosphoric acid, tab sis kuj siv ntau lub zog cua sov; Tsis tas li ntawd, thaum npaj cov slurry los ntawm neutralization, nws yog ib qho tsim nyog los ua kom sov thiab tshem tawm CO2, thiab cov txheej txheem yuav nyuaj. Txawm hais tias chemically purified ntub phosphoric acid tuaj yeem siv los hloov kub phosphoric acid los tsim sodium tripolyphosphate, vim muaj cov ntsiab lus ntawm cov hlau hlau hauv ntub phosphoric acid, nws yog ib qho nyuaj rau ua tau raws li qhov xav tau ntawm cov khoom siv sodium tripolyphosphate tam sim no, thiab nws kuj yog nyuaj kom ua tau raws li qhov ntsuas tau teev tseg hauv cov qauv hauv tebchaws.
Tam sim no, tib neeg tau kawm qee cov txheej txheem tshiab ntawm sodium tripolyphosphate, xws li Suav daim ntawv thov patent No. 94110486.9 "Ib txoj hauv kev tsim cov sodium tripolyphosphate", No. 200310105368.6 "Ib txoj kev tshiab rau kev tsim sodium tripolyphosphate", No.157040034 rau tsim sodium tripolyphosphate los ntawm cov txheej txheem qhuav-ntub, No. 200510020871.0 "Ib txoj hauv kev tsim cov sodium tripolyphosphate los ntawm Glauber's ntsev ob txoj kev decomposition", 200810197998.3 "Ib txoj kev tsim cov sodium tripolyphosphate ammonide thiab lwm yam. Txawm hais tias cov kev daws teeb meem no muaj lawv tus kheej cov yam ntxwv, feem ntau ntawm lawv yog los hloov cov khoom siv raw khoom nruab nrab.
Txoj kev tsim cov sodium tripolyphosphate siv crude sodium pyrophosphate
Lub crude sodium pyrophosphate ua ntej nkag mus rau hauv lub tank ntxuav kom tshem tawm feem ntau ntawm cov sodium chloride, thiab ces nkag mus rau hauv lub phaj thiab thav duab lim xovxwm rau thawj pom. Lub ncuav mog qab zib lim muaj ntau ntawm sodium pyrophosphate, thiab qhov loj ntawm sodium chloride yog tsawg dua 2.5%. Tom qab ntawd, cov tshuaj yog rhuab mus rau 85 ° C nyob rau hauv lub dissolution tank nrog chav rau nplawm thiab dissolving. Sodium sulfide yog ntxiv thaum lub sij hawm tawg kom tshem tawm cov hlau ions. Cov teeb meem insoluble yog impurities xws li tooj liab hydroxide. Nws yog lim dua rau zaum ob. Cov lim dej yog cov tshuaj sodium pyrophosphate. Cov pa roj carbon activated yog ntxiv rau cov lim kom tshem tawm cov xim, phosphoric acid ntxiv rau acidify thiab ua kom nrawm nrawm, thiab thaum kawg ua kua alkali ntxiv los kho tus nqi pH rau 7.5-8.5 los npaj cov kua ua kom zoo.
Ib feem ntawm cov kua refined yog siv ncaj qha rau hauv cov sodium tripolyphosphate neutralization ua kua seem, thiab lwm qhov ntawm cov kua refined yog pumped rau hauv DTB crystallizer. Cov kua ua kom zoo nyob rau hauv DTB crystallizer yog txias rau hauv lub tshav kub exchanger los ntawm ib tug yuam kev ncig twj tso kua mis thiab 5 ° C dej xa los ntawm lub chiller. Thaum cov tshuaj kub poob mus rau 15 ° C, nws yog crystallized rau hauv flocs thiab ces thauj mus rau lub tank theem siab thiab centrifuged rau hauv lub centrifuge rau centrifugal sib cais kom tau sodium pyrophosphate crystals. Cov sodium pyrophosphate crystals yog ntxiv rau cov kua nruab nrab ntawm kev npaj ua kua nyob rau hauv cov txheej txheem ntawm sodium tripolyphosphate thiab tov nrog phosphoric acid thiab kua caustic soda los npaj cov kua nruab nrab ua cov khoom siv raw rau kev tsim cov sodium tripolyphosphate. Cov brine uas tau hais los saum toj no raug xa rov qab los ntxuav cov dej nyoos sodium pyrophosphate; Thaum cov ntsiab lus sodium chloride nyob rau hauv brine ncav cuag saturation, lub brine yog pumped mus rau hauv lub tank tsis, thiab cov brine nyob rau hauv lub buffer tank yog pumped mus rau hauv lub sodium tripolyphosphate tail gas duct lub tsho los pauv cov cua kub nrog lub high-temperature tail gas. Lub brine tom qab tshav kub pauv rov qab mus rau lub tank tsis rau cov tshuaj evaporation.
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Post lub sij hawm: Nov-11-2024