硫(liu)酸(suan)鎂(mei)（七水硫(liu)酸(suan)鎂(mei)）CAS:10034-99-8國(guo)標 HG/T 2680-2009

工業七水硫酸鎂國標

硫(liu)酸鎂（七水(shui)硫(liu)酸鎂）CAS:10034-99-8國標 HG/T 2680-2009

工業七水硫酸鎂國標

化學性質：

為白色(se)或的(de)針狀(zhuang)或斜(xie)柱(zhu)狀(zhuang)結晶(jing)體，無臭(chou)﹑涼(liang)并(bing)微苦，分(fen)子量(liang): 246.47，比重1.68，易(yi)溶(rong)于(yu)水(shui)(shui)，微溶(rong)于(yu)乙(yi)醇和甘油(you)，在(zai)67.5℃溶(rong)于(yu)自(zi)身的(de)結晶(jing)水(shui)(shui)中。受熱分(fen)解，70﹑80℃是失去四分(fen)子的(de)結晶(jing)水(shui)(shui)。月(yue)200℃失去結晶(jing)水(shui)(shui)成無水(shui)(shui)物(wu)。在(zai)空(kong)氣(qi)（干(gan)燥(zao)）中易(yi)風化(hua)為粉狀(zhuang)，加熱時逐漸(jian)脫去結晶(jing)水(shui)(shui)變為無水(shui)(shui)硫酸(suan)鎂。七水(shui)(shui)硫酸(suan)鎂因為不容易(yi)溶(rong)解，比無水(shui)(shui)硫酸(suan)鎂更容易(yi)稱量(liang)，便于(yu)在(zai)工業中進行的(de)定量(liang)控制。

分類：

硫(liu)酸鎂(mei)(mei)常指七水(shui)(shui)硫(liu)酸鎂(mei)(mei)（因為它不容(rong)易(yi)溶解，比(bi)無水(shui)(shui)硫(liu)酸鎂(mei)(mei)容(rong)易(yi)稱量(liang)，便(bian)于在工業中進行(xing)的定(ding)量(liang)控制。）另外還(huan)有一(yi)水(shui)(shui)、二水(shui)(shui)、三水(shui)(shui)、無水(shui)(shui)硫(liu)酸鎂(mei)(mei)。

七水硫酸鎂有工業(ye)級和飼料級，顆粒(li)狀，根據(ju)大(da)小有0.1-1mm,1-3mm,2-4mm三種。

其他如無水、一(yi)水、二(er)水、三水硫酸鎂均為粉末狀。

常用包裝：

25Kg/袋

主要用途：

主要用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)微生(sheng)(sheng)物(wu)(wu)(wu)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、輕(qing)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、化(hua)學工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、印(yin)染(ran)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、制藥(yao)(yao)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、電鍍工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)、冶煉(lian)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)。在(zai)(zai)農業(ye)(ye)(ye)上(shang)用(yong)(yong)(yong)(yong)(yong)(yong)作(zuo)肥(fei)(fei)料(liao)(liao)；可(ke)作(zuo)飼料(liao)(liao)添加(jia)劑(ji) ；用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)火(huo)柴(chai)、瓷器、玻璃、顏料(liao)(liao)、ABS樹脂的(de)制造；在(zai)(zai)防(fang)火(huo)材料(liao)(liao)方面用(yong)(yong)(yong)(yong)(yong)(yong)作(zuo)丙(bing)烯酸(suan)脂樹脂等(deng)(deng)塑料(liao)(liao)的(de)阻燃劑(ji)；用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)污水處理。七水硫(liu)酸(suan)鎂(mei)(mei)(mei)在(zai)(zai)輕(qing)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)中(zhong)用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)生(sheng)(sheng)產鮮酵(jiao)母、味(wei)精、飲(yin)料(liao)(liao)；在(zai)(zai)化(hua)學工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)中(zhong)用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)制造硬脂酸(suan)鎂(mei)(mei)(mei)、磷酸(suan)氫(qing)鎂(mei)(mei)(mei)，氧(yang)化(hua)鎂(mei)(mei)(mei)等(deng)(deng)其(qi)它(ta)鎂(mei)(mei)(mei)鹽和硫(liu)酸(suan)鉀、硫(liu)酸(suan)納等(deng)(deng)其(qi)它(ta)硫(liu)酸(suan)鹽；在(zai)(zai)防(fang)火(huo)材料(liao)(liao)中(zhong)用(yong)(yong)(yong)(yong)(yong)(yong)作(zuo)填(tian)充劑(ji)耐熱(re)性；在(zai)(zai)制藥(yao)(yao)上(shang)硫(liu)酸(suan)鎂(mei)(mei)(mei)加(jia)工(gong)(gong)(gong)(gong)為瀉藥(yao)(yao)、抗驚厥藥(yao)(yao)、三硅酸(suan)鎂(mei)(mei)(mei)、麥白霉素(su)、乙酰螺旋霉素(su)和肌昔等(deng)(deng)藥(yao)(yao)物(wu)(wu)(wu)。在(zai)(zai)肥(fei)(fei)料(liao)(liao)行業(ye)(ye)(ye)，用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)制造鎂(mei)(mei)(mei)肥(fei)(fei)料(liao)(liao)，對植物(wu)(wu)(wu)的(de)生(sheng)(sheng)長(chang)起(qi)了(le)很大的(de)作(zuo)用(yong)(yong)(yong)(yong)(yong)(yong)。在(zai)(zai)食品工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)上(shang)硫(liu)酸(suan)鎂(mei)(mei)(mei)用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)乳酸(suan)、味(wei)精等(deng)(deng)。在(zai)(zai)制革工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)中(zhong)用(yong)(yong)(yong)(yong)(yong)(yong)作(zuo)填(tian)充劑(ji)；在(zai)(zai)電鍍工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)中(zhong)用(yong)(yong)(yong)(yong)(yong)(yong)做導電鹽；在(zai)(zai)印(yin)染(ran)上(shang)可(ke)用(yong)(yong)(yong)(yong)(yong)(yong)作(zuo)織物(wu)(wu)(wu)上(shang)染(ran)劑(ji)、加(jia)重劑(ji)、鎂(mei)(mei)(mei)染(ran)劑(ji)。另外(wai)用(yong)(yong)(yong)(yong)(yong)(yong)于(yu)工(gong)(gong)(gong)(gong)業(ye)(ye)(ye)污水處理，對廢液污水起(qi)到凝結和沉降作(zuo)用(yong)(yong)(yong)(yong)(yong)(yong)使其(qi)達到排污標準。

一水硫酸鎂

應用：1.作復合(he)肥(fei)干燥劑

2.做農(nong)肥(fei)(fei)硫酸鎂(mei)作(zuo)為肥(fei)(fei)料，可(ke)直接用(yong)作(zuo)基肥(fei)(fei)，追肥(fei)(fei)和葉面肥(fei)(fei)，可(ke)單獨施用(yong)，也可(ke)作(zuo)為組分之一摻混使用(yong)。可(ke)在(zai)傳(chuan)統(tong)農(nong)業領域，也可(ke)在(zai)高附加值(zhi)的農(nong)業，花卉和無土(tu)栽(zai)培領域中應用(yong)。

3.飼料添加劑(ji)（一般用量較小）

制備工藝：

1.硫酸(suan)法此法以白(bai)云石(shi)、蛇(she)紋石(shi)、菱苦(ku)土為原料。

2.重結晶法鹽(yan)湖中(zhong)得(de)到的苦(ku)鹵自然(ran)蒸發濃縮成粗鎂(粗硫(liu)酸(suan)鎂)。以粗鎂為原料，在(zai)80～90℃下加水溶化(hua)，然(ran)后在(zai)60～70℃溫度(du)下澄清，在(zai)20～25℃冷卻結晶、經離(li)(li)心分離(li)(li)，干燥，制得(de)工業硫(liu)酸(suan)鎂成品。將工業用(yong)硫(liu)酸(suan)鎂浸入蒸餾水，用(yong)硫(liu)酸(suan)調節(jie)Ph值，離(li)(li)心分離(li)(li)、干燥脫水經再結晶，制得(de)硫(liu)酸(suan)鎂。

3.海水(shui)曬鹽苦(ku)鹵法(fa)海水(shui)曬鹽得苦(ku)鹵，用兌鹵法(fa)蒸發后，產出高溫(wen)鹽，其組成為MgSO4＞30%、NaCI＜35%、MgCl2約為7%、KCl約為0.5%。苦(ku)鹵可用200g/L的(de)MgCl2溶(rong)液在(zai)48℃浸(jin)溶(rong)，NaCl溶(rong)解(jie)較少，而MgSO4溶(rong)解(jie)較多。分離后，浸(jin)液冷(leng)卻至10℃便析出粗的(de)MgSO4•7H2O，經二次(ci)重(zhong)結(jie)晶得成品(pin)。

無水硫酸鎂CAS7487-88-9國標

性狀：外(wai)觀為白色(se)粉(fen)末。

應用： 農業上用作(zuo)鎂肥增(zeng)加農作(zuo)物產(chan)量(liang)。