Kev siv cov dej qab zib caustic suav nrog ntau qhov chaw.

Caustic soda tuaj yeem muab faib ua flake soda, granular soda thiab cov dej qab zib zoo raws li nws daim ntawv. Kev siv cov dej qab zib caustic suav nrog ntau thaj chaw, cov hauv qab no yog cov lus qhia ntxaws ntxaws rau koj:

1. Refined roj av.

Tom qab ntxuav nrog sulfuric acid, cov khoom siv roj av tseem muaj qee cov tshuaj acidic, uas yuav tsum tau ntxuav nrog sodium hydroxide tov thiab tom qab ntawd ntxuav nrog dej kom tau txais cov khoom ua kom zoo.

2. luam ntawv thiab dyeing

Feem ntau siv hauv indigo dyes thiab quinone dyes. Nyob rau hauv cov txheej txheem dyeing ntawm vat dyes, caustic soda tov thiab sodium hydrosulfite yuav tsum tau siv los txo lawv mus rau leuco acid, thiab ces oxidized rau thawj insoluble lub xeev nrog oxidants tom qab dyeing.

Tom qab cov paj rwb ntaub yog kho nrog caustic soda tov, siv quav ciab, roj, hmoov txhuv nplej siab thiab lwm yam khoom uas muaj nyob rau ntawm lub paj rwb ntaub yuav raug tshem tawm, thiab nyob rau tib lub sij hawm, lub mercerized luster ntawm cov ntaub yuav ua rau kom cov dyeing ntau uniform. .

3. Textile fiber ntau

1). Textile

Cov paj rwb thiab linen fabrics yog kho nrog concentrated sodium hydroxide (caustic soda) tov los txhim kho fiber ntau. Tib neeg tsim fibers xws li rayon, rayon, rayon, thiab lwm yam, feem ntau yog viscose fibers. Lawv yog tsim los ntawm cellulose (xws li pulp), sodium hydroxide, thiab carbon disulfide (CS2) ua raw khoom los ua viscose kua, uas yog sprayed, ua los ntawm condensation.

2). Viscose fiber ntau

Ua ntej, siv 18-20% caustic soda tov rau impregnate cellulose kom nws mus rau hauv alkali cellulose, ces qhuav thiab crushed alkali cellulose, ntxiv carbon disulfide, thiab thaum kawg dissolve lub sulfonate nrog dilute lye kom tau viscose. Tom qab lim thiab nqus tsev (tshem tawm cov npuas npuas), nws tuaj yeem siv rau kev sib tw.

4. Ntawv ua

Cov ntaub ntawv raw rau papermaking yog ntoo lossis nyom nroj tsuag, uas muaj ntau yam tsis-cellulose (lignin, gum, thiab lwm yam) ntxiv rau cellulose. Sodium hydroxide yog siv rau delignification, thiab tsuas yog thaum lub lignin nyob rau hauv cov ntoo raug tshem tawm tau fibers. Cov khoom uas tsis yog-cellulose tuaj yeem yaj thiab sib cais los ntawm kev ntxiv cov tshuaj sodium hydroxide diluted, kom cov tawv nqaij nrog cellulose ua cov khoom tseem ceeb tuaj yeem tau txais.

5. Txhim kho cov av nrog txiv qaub.

Hauv cov av, huab cua ntawm cov zaub mov kuj tuaj yeem tsim cov kua qaub vim tsim cov organic acids li cov organic teeb meem decomposes. Tsis tas li ntawd, kev siv cov chiv inorganic xws li ammonium sulfate thiab ammonium chloride kuj yuav ua rau cov av acidic. Kev siv cov kua qaub tsim nyog tuaj yeem ua rau cov tshuaj acidic hauv av, ua rau cov av tsim nyog rau kev loj hlob ntawm cov qoob loo thiab txhawb kev loj hlob ntawm cov kab mob. Qhov nce ntawm Ca2 + hauv av tuaj yeem txhawb nqa cov coagulation ntawm cov av colloids, uas yog qhov tsim nyog rau kev tsim cov aggregates, thiab tib lub sijhawm tuaj yeem muab cov calcium uas xav tau rau cov nroj tsuag loj hlob.

6. Kev lag luam tshuaj thiab tshuaj chemical reagents.

Hauv kev lag luam chemical, caustic soda yog siv los ua sodium hlau thiab electrolyzing dej. Caustic soda lossis soda tshauv yog siv los tsim ntau cov ntsev inorganic, tshwj xeeb tshaj yog nyob rau hauv kev npaj ntawm qee cov ntsev ntsev (xws li borax, sodium silicate, sodium phosphate, sodium dichromate, sodium sulfite, thiab lwm yam). Caustic soda los yog soda tshauv kuj tseem siv rau hauv kev sib txuas ntawm dyes, tshuaj thiab organic intermediates.

7. roj hmab, tawv

1). Precipitated silica

Ua ntej: ua dej iav (Na2O.mSO2) los ntawm kev ua haujlwm ntawm sodium hydroxide nrog quartz ore (SiO2)

Thib ob: reacted iav dej nrog sulfuric acid, hydrochloric acid, thiab carbon dioxide los tsim precipitated dawb carbon dub (silicon dioxide)

Cov silica tau hais ntawm no yog tus neeg sawv cev zoo tshaj plaws rau cov roj hmab ntuj thiab hluavtaws roj hmab

2). Recycling ntawm cov roj hmab qub

Hauv kev rov ua dua tshiab ntawm cov roj hmab qub, cov roj hmab hmoov yog pretreated nrog sodium hydroxide tov, thiab tom qab ntawd ua tiav.

3). Tawv

Tannery: cov txheej txheem rov ua dua tshiab ntawm tannery pov tseg cov hmoov tshauv kua, ntawm ib sab, ntawm ob kauj ruam ntawm sodium sulfide aqueous tov soaking kev kho mob thiab ntxiv txiv qaub hmoov soaking kev kho mob nyob rau hauv cov txheej txheem nthuav dav, kev siv tare nyhav yog nce los ntawm 0.3-0.5 % 30% sodium hydroxide tov kev kho cov kauj ruam ua rau cov tawv nqaij fiber ntau nthuav dav, ua tau raws li cov txheej txheem yuav tsum tau ua, thiab txhim kho qhov zoo ntawm cov khoom ib nrab.

8. metallurgy, electroplating

Hauv kev lag luam metallurgical, feem ntau nws yog qhov tsim nyog los hloov cov khoom xyaw nquag hauv cov ore rau hauv cov ntsev sodium ntsev kom tshem tawm cov impurities insoluble. Yog li ntawd, nws yog ib qho tsim nyog yuav tau ntxiv dej qab zib tshauv (nws kuj yog ib qho flux), thiab qee zaum cov dej qab zib caustic kuj siv.

9.lwm yam ntawm lub luag haujlwm

1). Muaj ob txoj haujlwm ntawm ceramic caustic soda hauv kev tsim cov ceramics. Ua ntej, caustic soda yog siv raws li ib tug diluent nyob rau hauv lub firing txheej txheem ntawm ceramics. Qhov thib ob, qhov saum npoo ntawm cov ceramics raug rho tawm haujlwm yuav raug khawb lossis ntxhib heev. Ntxuav nws nrog caustic soda tov Thaum kawg, ua kom cov ceramic nto du dua.

2). Hauv kev lag luam ntsuas, nws yog siv los ua acid neutralizer, decolorizer thiab deodorizer. Adhesive kev lag luam yog siv los ua hmoov txhuv nplej siab gelatinizer thiab neutralizer. Nws tuaj yeem siv los ua tus neeg saib xyuas, decolorizing tus neeg sawv cev thiab deodorizing tus neeg sawv cev ntawm citrus, txiv duaj, thiab lwm yam.