丙酸鈉,白色結晶或結晶性粉末、無色透明結晶或顆粒性結晶粉末。無臭或略帶丙酸臭。在濕空氣中易吸濕。熔點400℃以上(分解)。易(yi)潮解,極易(yi)溶(rong)于(yu)水,溶(rong)于(yu)乙醇,微溶(rong)于(yu)丙酮。
丙酸鈉生產方法有(you)很多,主要有(you)以下幾種:
生(sheng)產方法一:碳酸鈉粉末在中(zhong)(zhong)(zhong)(zhong)和(he)鍋中(zhong)(zhong)(zhong)(zhong)溶解,再(zai)加入(ru)丙酸中(zhong)(zhong)(zhong)(zhong)和(he)至pH=7~8,中(zhong)(zhong)(zhong)(zhong)和(he)溫(wen)度70~100℃,中(zhong)(zhong)(zhong)(zhong)和(he)時間2~3h。將中(zhong)(zhong)(zhong)(zhong)和(he)液過濾(lv)除去(qu)不溶物,清液經濃縮、冷卻、結晶、分(fen)離、干(gan)燥得成品。CH3CH2COOH[Na2CO3]→CH3CH2COONa
生產方法二:丙酸和碳酸鈉在80-90℃反應2-3小時,pH=7-8,反應畢,經過濾、噴霧干燥得成品。