Kraft Lignin hauv Tshuag

1. Taw qhia

Kraft lignin tseem hu ua cov av ntub dej lignin lossis acid-precipitated lignin hauv Suav teb, yog ua los ntawm spruce thiab ntoo thuv, thiab cov tsos yog daj- xim av amorphous hmoov. Extracted los ntawm kraft pulping txheej txheem, nws yog dav siv nyob rau hauv dye dispersants, adsorbents thiab desorbents, sequestrants, asphalt emulsion stabilizers, resins, cardboard thiab plywood adhesives, thiab lwm yam.

2. Muaj nuj nqi

Tam sim no, daim ntawv thov teb ntawm Kraft lignin tau nthuav dav los ntawm cov tsoos qis- tus nqi roj mus rau siab - cov ntaub ntawv ua tau zoo. Cov lus qhia ib txwm siv muaj xws li:

Traditional thiab ntau daim ntawv thov:

2.1 Roj: Siv los ua cov roj boiler hauv cov tshuab hluav taws xob kom rov qab muaj zog cua sov.

Adhesives thiab resins: Siv los ua ib feem hloov pauv rau roj av-raws li phenol hauv kev tsim cov phenolic resins (xws li rau plywood).

Tus nqi siab- ntxiv cov ntawv thov:

2.2 Carbon fiber ntau precursor: Vim nws cov ntsiab lus carbon siab, nws raug suav hais tias yog ib qho khoom siv zoo tshaj plaws rau kev tsim cov khoom qis - nqi carbon fiber.

Dispersants thiab additives: Tom qab kev hloov kho tshuaj (xws li sulfonation), lawv tuaj yeem siv los ua cov khoom ua kom muaj zog hauv cov cement, pob zeb, dyes thiab tshuaj tua kab.

2.3 Cov tshuaj tiv thaiv ultraviolet: Siv lawv tus kheej benzene nplhaib qauv thiab pab pawg ua haujlwm kom nqus tau cov teeb ci ultraviolet thiab siv rau hauv cov tshuaj pleev ib ce xws li tshuaj pleev thaiv hnub.

2.4 Cov ntaub ntawv polymer tshiab: Siv los npaj cov ntaub ntawv biobased polymer xws li polyurethane thiab epoxy resin, lossis ua cov khoom ua haujlwm.

Hlau corrosion inhibitor: Lignin derivatives npaj los ntawm kev hloov kho tshuaj muaj peev xwm adsorb zoo rau ntawm cov hlau qhov chaw kom tiv thaiv kev xeb ntau dhau thaum ntxuav cov kua qaub.

3. Daim ntawv thov

Kraft lignin nce depletion ntawm fossil peev txheej thiab cov kev xav tau ntawm kev txhim kho kom ruaj khov, kev hloov pauv ntawm sulfate lignin los ntawm qis- tus nqi roj mus rau siab - cov ntaub ntawv muaj txiaj ntsig tau dhau los ua lub ntsiab lus kub ntawm kev txhawj xeeb hauv kev kawm thiab kev lag luam. Nws cia siab tias yuav paub txog roj av-raws li cov khoom lag luam hauv ntau thaj chaw yav tom ntej. Lwm txoj.
Kraft lignin, siab - purity biopolymer tau los ntawm cov txheej txheem kraft pulping, tau tshwm sim los ua ib qho tseem ceeb hauv kev hloov pauv thoob ntiaj teb rau cov khoom siv ruaj khov. Nyob rau hauv 2023, lub ntiaj teb no ntau lawm muaj peev xwm rau kraft lignin mus txog kwv yees li 112 kt ib xyoo. Qhov kev nce siab no qhia txog kev paub txog kev loj hlob ntawm lignin lub peev xwm hauv ntau daim ntawv thov kev lag luam, suav nrog bio-raws li adhesives, carbon fibers, thiab phenolic resins.

4.Specification

5.Flow chart

6. Kev xeem

Qauv ua ntej: Siv roj av ether tshem tawm cov khoom cuam tshuam xws li resin.

Ob -theem acid hydrolysis:

Thawj theem: Hydrolysis tus qauv nrog 72% sulfuric acid ntawm 30 ± 1℃rau li 1 teev los rhuav tshem cov qauv carbohydrate.

Qhov thib ob theem: Dilute cov acid concentration mus rau 4%, thiab txuas ntxiv mus rau hydrolyze nyob rau hauv ib tug autoclave ntawm 120 ± 3℃rau li 1 teev kom ntseeg tau tias carbohydrates yog yaj tag.

Kev sib cais thiab ntsuas:

Acid-insoluble lignin: Lim los ntawm iav xuab zeb core crucible kom tau txais cov khoom seem, uas yog qhuav thiab hnyav.

Acid-soluble lignin: Sau cov lim dej, ntsuas qhov nqus nrog ultraviolet- pom spectrophotometer ntawm lub wavelength ntawm 205 nm, thiab xam cov ntsiab lus raws li qhov tshwj xeeb nqus coefficient.

Tag nrho cov ntsiab lus lignin=acid-insoluble lignin cov ntsiab lus + acid- cov ntsiab lus lignin soluble

7. NMR

8. Kev ruaj ntseg thiab kev nyab xeeb

Peb tau kawm ntau yam kev ruaj ntseg thiab kev nyab xeeb txog cov khoom no, raws li kev ceev thiab ntev - cov ntaub ntawv ruaj ntseg, nws qhia cov yam ntxwv ruaj khov; Raws li kev tshawb nrhiav tsiaj txhu, nws qhia tau tias muaj kev nyab xeeb.

9. Daim ntawv pov thawj

10. Exhibition

11. Peb Cov Neeg Siv Khoom

Peb tau tsim kev lag luam kev sib raug zoo nrog Abbott, Unilever, Shiseido, KANS thiab SIMM, thiab lwm yam.

12.Cov neeg siv kev tshuaj xyuas