Kev npaj ntawm sulfuric acid thiab nws teb ntawm daim ntawv thov.

Niaj hnub no, qhov kev npaj ntawm sulfuric acid yog ua mas ob muaj dab: kev sib cuag thiab Nitrogen. Tiv tauj txoj kev yog ntau hnyav thiab nyob rau hauv Russia nws yog siv feem ntau tshaj cov pa roj nitrous, piv txwv li pej thuam.

Kev npaj ntawm sulfuric acid pib nrog lub firing ntawm sulphurous cov ntaub ntawv, e.g., hlau pyrites. Nyob rau hauv tshwj xeeb furnaces pyrite tau thiaj hu ua kiln cov roj, uas muaj txog 9% ntawm cov leej faj dioxide. Kauj ruam no yog tib yam rau kev sib cuag thiab rau cov pa roj nitrous txoj kev.

Tom ntej no, lub resulting oxidized leej faj dioxide rau sulfur. Txawm li cas los, nws yuav tsum tau pre-ntxuav los ntawm ib tug xov tooj ntawm impurities uas cuam tshuam nrog tus ntxiv cov txheej txheem. Lub calcined roj lim ntawm hmoov av nyob rau hauv precipitators los yog cyclone apparatus, thiab ces nkag mus rau lub ntaus ntawv, muaj ib tug khoom hu loj, qhov chaw uas cov leej faj dioxide li ₂ yog oxidized rau leej faj trioxide li _3.

Qhov no exothermic cov tshuaj tiv thaiv yog reversible - nce nyob rau hauv kub ua rau decomposition ntawm lub tsim leej faj trioxide. Nyob rau lwm cov tes, thaum kub yog txo qis cov pem hauv ntej cov tshuaj tiv thaiv tus nqi yog heev qeeb. Yog li ntawd, qhov kub thiab txias nyob rau hauv lub contactor yog khaws cia tsis pub dhau 480 ^{° C} los kho nws cov kev ceev ntawm tso cai ntawm lub gaseous sib tov.

Tom qab tsim ntawm cov kev sib cuag hom sulfuric acid nrog ib tug compound ntawm leej faj trioxide nrog dej.

Nitrous txoj kev yog yus nyob rau hauv uas lub leej faj dioxide yog oxidized nitrogen oxides. Kev npaj ntawm sulfuric acid los ntawm cov qauv no yog pib lub tsim ntawm sulfurous acid nyob rau hauv lub sis ntawm cov leej faj dioxide los ntawm ci roj nrog dej. Tom qab lub resulting sulfurous acid yog oxidized nrog nitric acid, uas ua nyob rau hauv lub tsim ntawm nitrogen monoxide thiab sulfuric acid.

Qhov no cov tshuaj tiv thaiv sib tov yog noj mus rau hauv ib tug tshwj xeeb pej thuam. Yog li, los ntawm kev kho kom haum cov roj txaus kom ntseeg tau tias cov roj sib tov ntog nyob rau hauv lub haum pej thuam dioxide thiab nitrogen monoxide muaj nyob rau hauv ib tug ratio ntawm 1: 1 yog tsim nyog los muab cov nitrogenous anhydride.

Thaum kawg, los ntawm reacting sulfuric acid thiab cov pa roj nitrous anhydride tsim NOHSO ₄ - nitrosylsulfuric acid.

Cov uas ua nitrosylsulfuric acid yog noj mus rau lub ntau lawm ntauwd qhov twg nws decompose dej, cov pa roj nitrous anhydride allocates:

2NOHSO ₄ + H ₂ O = N ₂ O ₃ + 2H ₂ li _4,

uas oxidizes thiab sulfurous acid tsim nyob rau hauv tus pej thuam.

Nitric oxide tso nyob rau hauv lub resulting cov tshuaj tiv thaiv yog dua rov qab mus rau lub oxidation pej thuam thiab nkag mus rau ib tug tshiab kev voj voog.

Tam sim no, qhov kev npaj ntawm sulfuric acid Lavxias teb sab ua tsuas yog los ntawm hu rau. Nitrous txoj kev yog tsis tshua muaj siv.

Kev siv cov sulfuric acid yog dav heev thiab ntau yam.

Feem ntau ntawm nws mus rau zus tau tej cov tshuaj fibers thiab mineral chiv, nws yog tsim nyog nyob rau hauv zus tau tej cov tshuaj thiab dyes. Siv sulfuric acid muab ethyl thiab lwm yam alcohols, detergents thiab cov tshuaj tua kab.

Nws lub ntsiab yog siv nyob rau hauv lub textile thiab khoom noj khoom haus industries, nyob rau hauv dab rau zus tau tej cov nitration thiab tawg. Sulfuric acid ua hauj lwm pab raws li ib tug roj teeb ntsha sau nyob rau hauv cov hlau lead-acid roj teeb, uas yog dav siv nyob rau hauv cov thauj.