The new technology for the preparation of cryolite from fluosilicic acid and ammonium hydrocarbonate is introduced.

介紹了氟硅酸人人妻人人添人人爽欧美一区91、碳酸氫銨制備冰晶石的新工藝精品国偷自产在线不卡视频。

Fluosilicic acid,which is the byproduct from phosphate fertilizer factory,reacts with ammonium hydrocarbonate to obtain ammonium fluosilicate,then reacts with ammonium carbonate to form settled SiO 2,after filtration,water washing,drying and calcining,high purity SiO 2 with less than 10×10 -6 metal impurity and less than 10×10 -9 uranium and thorium respectively is made.

由磷肥廠副產(chǎn)氟硅酸同碳銨反應得氟硅酸銨，再和碳銨反應生成SiO2 沉淀国产精品H在线播放第一页，經(jīng)過濾快射视频网、水洗、干燥人人射人人操人人骑人人插、煅燒得高純SiO2 美女美女大片黄a大片，其金屬雜質(zhì)總含量小于 10× 10 -6，含放射性元素鈾和釷各小于 10× 10 -9无码免费A片久久，通過實驗獲得了適宜的工藝條件欧美性爱AAAAAAA，反應溫度 70℃～ 80℃，反應時間 1 5h～ 2 0h 中国体内精谢视频免费，配料比n(NH4HCO3 )∶n(NH4 2 SiF6 =4 4婷婷五月综合色啪网站。

Wheat ; Vegetative Growth ; Fertility Level ; Hydrocarbonate

小麥；營養(yǎng)生長欧美一级A片又大又爽；肥力水平来个能看的黄网；光合產(chǎn)物

Specific contents and main conclusions are shown as follows:(1) The influence of precipitant on the properties of YAG:Ce phosphor was investigated. The precursor has good dispersity, when selecting ammonia hydrocarbonate as precipitant.

主要研究內(nèi)容及結(jié)論如下：(1)研究了沉淀劑對前驅(qū)體制備的影響，結(jié)果表明：碳酸氫銨作沉淀劑制備的前驅(qū)體分散性好桃花在线观看国产电影，煅燒過程中直接轉(zhuǎn)變?yōu)閅AG相国产成人精品一区二三区，沒有雜相生成。

First,brine is reacted with ammonium hydrocarbonate to obtain the sodium hydrocarbonate and the ammonium chloride solution,and then filtrated.

鹵水制備純堿分兩步進行99色精品视频，第一步用鹵水又粗又黄又硬又爽的免费视频,、碳酸氫銨反應得到碳酸氫鈉微溶析出和氯化銨溶液，過濾精品视频一区二区在线导航。

hydrocarbonate：碳酸氫鹽

hydrocarbon 碳氫化合物 | hydrocarbonate 碳酸氫鹽 | hydrocarbons' heavier elements analyzer 烴類較重元素分析儀

hydrocarbonate：重碳酸鹽

hydrocarbonate water 重碳酸鹽水 | hydrocarbonate 重碳酸鹽 | hydrocarbons 烴類

hydrocarbonate：酸性碳酸鹽;碳酸氫鹽

hydrocarbon 烴;碳氫化合物 | hydrocarbonate 酸性碳酸鹽;碳酸氫鹽 | hydrocellulose 水化纖維素

hydrocarbonate water：重碳酸鹽水

hydrocarbon-water pair 烴-水對 | hydrocarbonate water 重碳酸鹽水 | hydrocarbonate 重碳酸鹽

cesium hydrocarbonate; cesium hydrogencarbonate：碳酸氫銫

氫化銫 cesium hydride | 碳酸氫銫 cesium hydrocarbonate; cesium hydrogencarbonate | 酞酸氫銫;鄰-苯二甲酸氫銫 cesium hydrogenphthalate