Magnesium hydroxide. Lub cev thiab tshuaj zog. Daim ntawv thov.

magnesium hydroxide (formula Mg (OH) 2) - yog ib tug inorganic tshuaj compound, magnesium hydroxide (alkaline ntiaj teb hlau). Nws yog hais txog cov pab pawg neeg-insoluble bases.

Lub cev thaj chaw ntawm magnesium hydroxide

1. Nyob rau hauv tej yam kev mob, magnesium hydroxide yog tsis muaj kob (pob tshab) muaju muaj ib tug hexagonal lattice.
2. decomposes rau magnesium oxide (MgO), thiab dej (H2O) nyob rau hauv ib tug kub ntawm peb puas tsib caug degrees.
3. absorbs tej huab cua los ntawm cov pa roj carbon dioxide (CO2) thiab dej (H2O), li no txoj kev ua ib tug yooj yim magnesium carbonate.
4. Xyaum insoluble nyob rau hauv dej thiab soluble nyob rau hauv ammonium ntsev.
5. Lub hauv paus ntawm nruab nrab lub dag lub zog.
6. Nyob rau hauv cov xwm, tshwm sim nyob rau hauv daim ntawv ntawm ib tug tshwj xeeb mineral - brucite.

Yuav ua li cas kom tau magnesium hydroxide?

1. Qhov no cov ntaub ntawv uas muaj peev xwm muab tau los ntawm reacting magnesium ntsev nrog rau ntau yam alkalies xws li:

MgCl2 (magnesium chloride) + 2NaOH (Sodium hydroxide) = Mg (OH) 2 (precipitated, magnesium hydroxide) + 2NaCl (sodium tshuaj dawb)

Mg (NO3) 2 (magnesium nitrate) + 2KOH (poov tshuaj puag) = Mg (OH) 2 (magnesium puag precipitates) + 2KNO3 (poov tshuaj nitrate)

2. Tsis tas li ntawd, ib tug tshuaj compound yuav tau ua los ntawm reacting calcined dolomite nrog chloride (MgCl2) tov ntawm magnesium (Cao * MgO):

MgCl2 (magnesium chloride) + Cao * MgO (calcined dolomite) + 2H2O (dej) = 2Mg (OH) 2 (magnesium puag precipitates) + CaCl2 (calcium chloride)

3. av magnesium yuav tau kuj los ntawm cov tshuaj tiv thaiv ntawm pa dej nrog lub nws yog xim hlau magnesium:

Mg (magnesium hlau) + 2H2O (dej vapor) = Mg (OH) 2 (precipitated) + H2 (hydrogen nyob rau hauv daim ntawv ntawm ib tug gas)

Cov tshuaj thaj chaw ntawm magnesium hydroxide:

1. Qhov no cov ntaub ntawv uas yog nyob rau hauv ib tug kub ntawm 350 degrees decomposes rau hauv magnesium oxide thiab dej. Nws zoo li no cov tshuaj tiv thaiv:

Mg (OH) 2 (magnesium hauv paus) = MgO (magnesium oxide) + 2H2O (dej)

2. sis nrog acids. Nyob rau hauv daim ntawv no ntsev thiab dej. piv txwv:

Mg (OH) 2 (puag) + 2HCl (hydrochloric acid) = MgCl2 (magnesium chloride) + 2H2O (dej)

Mg (OH) 2 (puag) + H2SO4 (sulfuric acid) = MgSO4 (magnesium sulfate) + 2H2O (dej)

3. Interfaces nrog acidic oxides. Cov tshuaj tiv thaiv ua cov ntsev thiab dej:

Mg (OH) 2 (puag) + SO3 (leej faj oxide) = MgSO4 (magnesium sulfate) + H2O (dej)

4. Tsis tas li magnesium hydroxide yog reacted kub concentrated alkali daws teeb meem. Nyob rau hauv daim ntawv no gidroksomagnezaty. piv txwv:

Mg (OH) 2 + 2NaOH (sodium puag) = Na2 (Mg (OH) 4)

Mg (OH) 2 + S (OH) 2 (leej faj puag) = Sr (Mg (OH) 4)

Daim ntawv:

- raws li ib tug khoom noj khoom haus additive, tsim los rau cov losis tswvyim dabtsi ntawm cov leej faj dioxide (SO2). Sau npe nyob rau hauv lub kos npe rau E528;
- raws li fokulyanta wastewater kho mob;
- raws li ib tug additive nyob rau hauv ntau yam detergents thiab raws li ib feem nyob rau hauv cov tshuaj txhuam hniav;
- refining ntawm qab zib thiab los tsim magnesium oxide (MgO);

Tshwj xeeb mloog yog muab rau siv ntawm cov tshuaj nyob rau hauv lub kho mob kev lag luam.

Magnesium hydroxide nyob rau hauv cov tshuaj

Qhov no antacid thiab laxative neeg sawv cev muaj peev xwm ntawm neutralizing ib lub ntsev (hydrochloric, HCl) acid nyob rau hauv lub plab thiab txo cov kev ua ntawm pais plab kua txiv. Yog li tsis ntxim ntawm magnesium hydroxide yog nrog los ntawm cov kev hloov AAR thiab theem nrab hypersecretion ntawm hydrochloric acid. Tsis tas li ntawd, qhov no tshuaj txhawb peristalsis thiab lwm yam cov hnyuv. Laxative txiav txim tshwm sim tom qab txog 2-6 teev.

Indications: mob gastritis nrog nce thiab ib txwm secretion, duodenal rwj thiab pais plab tsis xis nyob, los yog epigastric mob, kub siab tom qab haus luam yeeb los yog haus kas fes los yog dej caw, thiab cem quav.

Contraindications: npau taws me ntsis rau magnesium hydroxide.

Nws yog noteworthy tias tus neeg mob nrog raum teeb meem, tom qab daim ntawv thov ntawm cov magnesium puag tej zaum yuav tsim gipermagnemiya (i.e. ib tug dhau heev lawm ntawm magnesium nyob rau hauv lub cev).

Kuj siv nyob rau hauv cov tshuaj algeldrat magnesium hydroxide - ib lub cuab tam uas yog siv rau pais plab rwj, mob duodenitis, giperatsidnom gastritis, gastralgia, mob pancreatitis, kub siab, hyperphosphatemia, los yog putrefactive fermentation dipepsii. Qhov no tshuaj yog ua rau cov neeg mob uas npau taws me ntsis, tus kab mob Alzheimer, thaum lub sij hawm cev xeeb tub los yog pub niam mis.