碳酸铵

A process for preparing alkylene glycols including reacting an alkylene oxide with water in the presence of a combination of additives and an anion exchange resin, wherein the combination of additives comprises carbon dioxide and an organic or inorganic base provided in an amount sufficient to maintain a pH of the reaction mixture between about 5.0 and 9.0, with the proviso that, when the base is bicarbonate or carbonate, then the anion exchange resin is a trimethyl benzyl ammonium anion exchange resin.

制备亚烷基二醇的方法，包括让烯化氧与水在添加剂组合和阴离子交换树脂存在下进行反应，其中添加剂组合包括二氧化碳和以足以保持反应混合物的pH值在约5.0和9.0之间的量提供的有机或无机碱，前提条件是当碱是碳酸氢盐或碳酸盐时，阴离子交换树脂是三甲基苄基铵阴离子交换树脂。

Effect of NH4Cl on phase transformation of Al2O3 obtained from ammonium aluminum carbonate hydroxide has been studied.

利用 NH4Cl 其分解时释放气体的特点控制以碳酸铝铵为前驱体的氧化铝α相变过程中的团聚。

Ginger beer and honey cookies are sometimes seavened by ammonium carbonate together with potassium carbonate.

姜汁啤酒和蜂蜜小甜饼有时也可用碳酸胺结合以碳酸钾发酵生产。碳酸胺盐通常是碳酸氨和氨基酸铵的混合物。

The research was mainly based on the formation condition of crystalline ammonium yttrium carbonate and the variation characteristics of pH value during the crystallization in which NH4HCO3 was used to precipitate yttrium ion.

对碳酸氢铵沉淀钇时碳酸钇铵复盐结晶的形成条件与pH变化特征进行了研究，发现其结晶过程与平衡溶液pH有对应关系。

This paper has compared a green chemistry technology of ammonium eerie nitrate with the classical technology by atom economy.

从原子经济性出发，对以碳酸铈为原料合成硝酸铈铵的绿色化学工艺与传统工艺进行了对比。

Anisaldehyde was synthesized from p-hydroxybenzaldehyde with dimethyl carbonate by microwave irradiation under phase transfer catalyst tetrabutylammonium bromide, The effect of power, time, solvent and catalyst of reaction on yield were researched.

以四丁基溴化铵为相转移催化剂，采用对羟基苯甲醛和碳酸二甲酯为原料，微波辐射下合成大茴香醛。考察了反应溶剂、功率、时间和催化剂对反应产率的影响。

The influence of each condition on the reaction speed and yield was studied, and the optimal conditions were: the ratio of the amount of substance of aromatic amine and heptafluoro-isopropyl iodine was 1:1.1~1.5, the amount of substance of sodium dithionite, sodium bicarbonate, aniline compounds were respectively 1.1~1.3, the amount of substance of phase transfer catalyst TBAB and aniline compounds was 0.05~0.1, the concentration of aniline compound was 0.5~1.0 mol/L, reaction temperature was 10~20 ℃, and the solvent was aether.

最佳结果为：芳胺与七氟异丙基碘的物质的量比1：1.1~1.5，连二亚硫酸钠、碳酸氢钠与苯胺的物质的量分别为1.1~1.3，相转移催化剂四丁基溴化铵与苯胺的物质的量比在0.05~0.1，溶剂总用量使苯胺浓度在0.5~1.0 mol/L；反应温度10~20℃；溶剂采用乙醚。取代基供电子性越强，反应时间越短，产率越高；氨基的对位优先反应，氨基的邻位较难发生反应；且七氟异丙基总是优先取代在芳环电子云密度较高的位置上。

A sequential extraction technique to fractionate P and the method proposed by Bremner to separate N in different fractions were used.

本试验利用Sui 和 Thompson (1999)序列萃取法，以不同强弱的萃取剂来划分土壤中的磷，将土壤磷划分为水萃取磷、碳酸氢钠萃取有机磷及无机磷、氢氧化钠萃取有机磷及无机磷、盐酸萃取磷及残余磷；利用 Bremner (1965)的土壤有机态氮划分法将土壤有机态氮划分为水解性全氮、水解性铵态氮、胺基醣态氮、胺基酸态氮及不可辨认的水解性氮。

Seven of them have not been reported.Their structures were confirmed by IR,~1HNMR,MS,and element analysis. 4.Meanwhile,the green methylation procedure of imides was developed by using dimethyl carbonate as methylation reagent.A series of imides,for example,phthalimide,3,4-dibromo-maleimide and succincide were used for substrates.The effects of DABCO(1,4-diazabicyclo [2.2.2]octane)and DBU(1,8-diazabicyclo[5.4.0]undec-7-ene)as a catalyst in this kind of reactions were investigated.2-Bromo-3-(1-methylindolyl-3-yl)-1-methyl-1H-pyrrole-2,5-dione was prepared by using dimethyl carbonate,which further expanded the use of dimethyl carbonate,as a green agent in organic synthesis.

在以硫酸二甲酯为甲基化试剂对3，4-二溴马来酰亚胺进行N-甲基化反应合成3，4-二溴-N-甲基马来酰亚胺的同时，以碳酸二甲酯为甲基化试剂，对3，4-二溴马来酰亚胺、邻苯二甲酰亚胺、琥珀酰亚胺等酰亚胺类化合物的N-甲基化反应进行了研究；考察了1，4-二氮杂双环[2.2.2]辛烷，1，8-二氮杂双环[5.4.0]十一碳-7-烯、碳酸钾和四丁基溴化铵等作为催化剂对碳酸二甲酯N-甲基化反应的反应时间和收率等的影响，并应用碳酸二甲酯为甲基化试剂，合成了N-甲基-3-溴-4-(1-甲基-吲哚-3)-马来酰亚胺。

Light calcium carbonate, ACC, nanometer superfine calcium carbonate, magnesium carbonate, trihydrate alumina, silica white, strontium carbonate, barium carbonate, potassium carbonate, rubberlith, rongalite, permanent white, lemery, microspheroidal catalyst, magnesium hydrate, bluestone, nickel salt, sodium molybdate, sodium chloride, potassium chloride, calcium chloride, sodium fluoride, cryolite, iron oxide red, lithium hydroxide, zirconium hydroxide, calcium phosphate, sulfur, etc.

轻质碳酸钙、活性碳酸钙、纳米级超细碳酸钙、碳酸镁、氢氧化铝、白炭黑、碳酸锶、碳酸钡、碳酸钾、立德粉、保险粉、硫酸钡、硫酸钾、微球催化剂、氢氧化镁、硫酸铜、硫酸镍、镍酸铵、钼酸钠、氯化钠、氯化钾、氯化钙、氟化钠、冰晶石、氧化铁红、氢氧化锂、氢氧化镍、氢氧化锆、磷酸钙、硫磺等。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。