9.1. NATRIY SU L FID I
N a t r i y sulfidi xalq x o ‘jaligi u c h u n z a r u r b o ‘lgan ki myoviy m a h s u -
l ot la rda n biridir. As os an teri s a n o a t i d a terini j u n d a n t o za l a s h u c h u n ,
t o ‘q i m a c h i l i k s a n o a t i d a t iosulf at ishlab c h i q a r i s h d a q o ‘llaniladi.
N a t r i y sulfidi s u v d a e r u v c h a n m o d d a b o ‘lib, t o ‘y i n g a n e r i t m a d a
18°C 15,9, 90°C, 3 6, 4 %. Suvli e r i t m a d a n 4 8 °C q a d a r N a 2S • 9 H 20
h o l a t d a 48° C y u q o r i d a — N a 2S - 6 H 20 s h a k l i d a k ri st al la na di . Eri sh
nu qt as i 1040°C, n at r i y sulfidi a s o sa n nat ri y s u l f a t d a n uni q a yt ar ish
or qa li ol in a d i . Q a y t a r u v c h i m o d d a si fat ida k o ‘m i r d a n f o yd a la ni l a di ,
q ay ta r i s h j a r a y o n i q u yi da gi r e a ks iya l ar orqali ket ishi m u m k i n :
Qa y t a r i s h j a r a y o n i a s os an (1) reaksiya o rq a l i ket adi . T e m p e r a t u r a
85 0— 1000°C b o ‘l ga n d a j a r a y o n a n c h a j a d a l ket adi . B u s h a r o i t d a
qa y t ar ish j a r a y o n i (2) reaksiya or qa li h a m ket ishi m u m k i n , c h u n k i
t e m p e r a t u r a 800 d a n o s h g a c h C 0 2 k o ‘m i r b i l a n r eaks iyaga kirishib
C O hosil qiladi. C 0 2 + C - > 2 C O , y a ’ni m u v o z a n a t C O hosil b o ‘lishi
t o m o n i g a y o ‘n al g an b o ‘ladi.
Na t r i y sul fat ni ng qayt arish j a r a y o n i alangali yassi va uzl uksiz a y l a
n u v c h i s il indr ik p e c h l a r d a olib bori ladi . U n i n g u c h u n n a t r i y sulfat
va k o ‘m i r d a n iborat b o ‘lgan a r al as hm a (shixta) yaxshilab ma y d al an a d i
va ar alashtiriladi. A r a l a s h m a s o ' n g r a p e c h g a yub or i l ad i, p e c h n i qizi-
tish u c h u n ma x su s o ‘t x o n a d a yoqi lg‘i yoqil adi. P e c h d a hosil b o ‘lgan
q o t i s h m a er itmasi sovitiladi. Sovitilgan q o t i s h m a ma y d a l a n a d i , s o ‘ng-
ra q o t i s h m a d a n N a 2Sni ajratib olish u c h u n ma x su s q ur i l m a g a y u b or i
ladi. Bu q u r i l m a d a m a y d a l a n g a n q o t i s h m a suv b i lan yuviladi, nati jada
N a 2S e r i t m a g a o ‘t ad i , e r i t m a n i n g a r a l a s h m a q i smi q u r i l m a i c h i da
qol adi . N a 2S yaxshi erishi u c h u n suv b u g ‘i h a m b er i b t uriladi. Erish
n at ij as ida N a 2S e r it ma s i ol inib tarkibi 2 3 — 30% N a 2S, 1—6 N a 2C 0 3,
0 , 5 - 3 % N a 2S 0 3, 0 , 2 - 1 , 0 % N a 2S 0 3, 0 , 5 - 1 , 5 N a 2S 20 3 quyiltirish
j a r a y o n i g a y ubor i ladi . B u g ‘latish j a r a y o n i o c h i q q o z o n s i m o n a p p a -
r a t l a r d a olib b or i ladi , t e m p e r a t u r a 175— 185° ga c h i q q a c h e r i t m a
ni ng k o n se n t r a t s i y a s i 6 2 —6 4 % N a 2S t e n g b o ' l a d i . Ko ns en tr a t s iy a s i
6 2 —6 4 % y e t g a n d a e r i t m a m a x s us t a y y o r l a n g a n b a r a b a n l a r g a q u y i
ladi, q ot ir i la di va b a r a b a n q o p q o q l a r i yopi ladi .
N a 2S 0 4 + 2 C = N a 2S + 2 C O , - 24 0 kJ
N a 2S 0 4 + 4 C = N a 2S + 4 C O - 63 2 kJ
N a 2S 0 4 + 4 C O = N a 2S + 4 C 0 2 + 152 kJ
Dostları ilə paylaş: