碳酸钾

对影响S-烷基化反应的条件进行了优化，优化条件如下：2-硫代-4-咪唑啉二酮5mmol、卤代烷6mmol和无水碳酸钾8mmol；

The optimum conditions were : 2-thio-4-imidazolidinone , 5 mmol ; alkyl halides , 6 mmol ; potassium carbonate , 8 mmol ;

采用碳酸钾、氟化钾和氢氧化钾混合电解液，减少了氧化锌在碱性电解液中溶解度，延长了锌负极的循环寿命。

In potassium carbonate , potassium fluoride and potassium hydroxide alkaline electrolyte , dissolution of zinc oxide was reduced and cyclic life of negative electrodes were prolonged .

填料塔中碳酸钾/哌嗪混合吸收液脱除CO2的体积传质系数

Volumetric mass transfer coefficients of dilute CO_2 absorption into mixtures of potassium carbonate and piperazine in packed column

从而确定了以碳酸钾为沉淀剂在一定pH值时将八种添加剂采用分两步共沉淀的方法制备了复合纳米添加剂。

So the multiplex composite nano-additives were prepared by the two-step synthesis method with the precipitator of K2CO3 at appropriate pH value .

Np随碳酸钾浓度的增加持续变小。

Np continuously decreases as concentration of K2CO3 increasing .

同时用aspenplus软件模拟计算离子交换法生产碳酸钾除氨工艺。

Aspen Plus program was used for ammonia volatilization process in the production of potassium carbonate .

与均相碳酸钾催化剂相比，负载型碳酸钾催化剂上PC的选择性提高了40.3%。

As compared with the un supported catalysts , the selectivity of PC increases 40.3 % when the supported potassium carbonate catalyst is used .

离子交换法生产碳酸钾除氨的aspenplus模拟与实验研究

Aspen Plus simulation and experimental study on ammonia volatilization process in the production of potassium carbonate by ion-exchange method

多氯联苯（PCB＿S）在聚乙二醇碳酸钾过氧化钠体系中于90℃反应6小时，PCB＿S降解率达99.45%。

Polychlorobiphenyls react with polyethyleneglycol-potassium carbonate-sodium peroxide at 90 ℃ for 6h . Degradation efficiency for PCB_S is 99.5 % .

碳酸钾使环氧丙烷选择性降低，三甲胺引起TS-1催化剂失活。

Trimethylamine catalyzes the reaction of propylene oxide to polyethers , and causes the deactivation of TS-1 .

这说明aspenplus软件在碳酸钾除氨工艺设计计算中可以得到较理想的结果。

It is indicated that Aspen Plus program can be used in design calculation of ammonia volatilization process in the production of potassium carbonate , the preferable result can be obtained .

无水氟化钾和无水碳酸钾催化糠醛与乙酸酐的Perkin反应

Perkin Reaction of Furfural with Acetic Anhydride Catalyzed by Anhydrous Potassium Fluoride and Anhydrous Potassium Carbonate

根据现有的条件，本研究又对电解碳酸钾水溶液过程中的电解输入功率、电解起始温度和电解持续时间对系统k值的影响作了初步的探讨。

Simultaneously uses the existing experimental condition , to the process of the electrolysis of watery potassium carbonate , we has done the further research of the power input , the initial temperature and the electrolysis time how to influence the system calorimetry coefficient .

采用碳酸钾做中和剂，四氢呋喃-水做溶剂合成N月桂酰肌氨酸钠，收率由85%提高到94.2%，产品质量分数由85%提高到98.8%。

Using potassium carbonate for neutralization and THF as solvent sodium N lauroyl sarcosinate was synthesized with better yield and purity . The yield of N lauroyl sarcosinate was 94.2 % while that of common procedure was about 85 % , and its purity was 98.8 % .

为此在脱碳再生塔与CO2压缩机一段入口分离器之间增设洗涤器，比较圆满地解决了CO2夹带碳酸钾的问题。

Therefore , a scrubber is added between the regenerator in the CO_2 removal section and the separator at the inlet of the first stage of the compressor , thereby solving successfully the problem of entrainment of potassium carbonate in CO_2 .

以无水碳酸钾为碱催化剂，PEG-400为相转移催化剂，对羟基苯甲醚为阻聚剂，通过Perkin反应合成肉桂酸，研究了各物料比、回流时间对产品产率的影响。

Cinnamic acid was synthesized by Perkin reaction with anhydrous potassium carbonate as alkaline catalyst and PEG-400 as phase transfer catalyst and 4-hydroxyanisole as polymerization inhibitor .

采用LCA技术对利用钾长石粉体水热合成雪硅钙石、制备碳酸钾的工艺进行环境影响评价。

LCA technique was used to evaluate the influence of the procedure developed in this research to the environment in the process of the decomposition of the potassium feldspar and the preparation of the tobermorite .

实验测定了吡啶-水-碳酸钾体系在25℃时的液-液相平衡数据.当水相中w碳酸钾≥34.55%时，产生的吡啶相中含有可以忽略的盐、水相中含有可以忽略的吡啶；

The liquid-liquid equilibrium ( LLE ) data for pyridine-water-K2CO3 system are measured at 25 ℃ and show that pyridine phase contains negligible salt and water phase contains negligible pyridine when the concentrations of K2CO3 in the water phase are equal to or higher than 34.55 % .

碳酸钾催化从烯酮二硫缩醛合成多取代嘧啶本文以2-氰基-3,3-二甲硫基丙烯腈（1a）为起始原料通过方法和性质研究共得到尚未见文献报道的四类多取代嘧啶14个化合物。

Synthesis of polysubstituted pyrimidine from ketene dithioacetals by using K_2CO_3 catalyst Fourteen novel polysubstituted pyrimidine derivatives of four types were obtained by the designing synthesis , studies of the synthetic methods and chemical properties for them .

添加碳酸钾后，H2产率增幅较小，CO、CH4及其它气态烃产率基本不变，表明碳酸钾对烃类裂解反应无明显催化作用。

Slightly increase of hydrogen yield was found with potassium carbonate , but CO , CH_4 and other alkanes yields kept constant at the same time . It was obvious that the potassium carbonate had not clear catalytic effect on cracking reaction of heavy alkanes .

选择苯酚与环氧氯丙烷，在无水碳酸钾存在下，固－液相转移催化醚化形成苯基缩水甘油醚为基本反应，比较了DCAS与其他几种季铵盐的相转移催化作用。

The phase transfer catalytic action of DCAS was studied through solid-liquid phase transfer catalysis etherification of phenol with epichlorohydrin in the presence of anhydrous potassium carbonate .

测定了丙烯腈-水-碳酸钾体系在25℃时的液-液相平衡数据，相平衡结果表明当水相中K2CO3浓度为52.50%时，有机相中丙烯腈的浓度高达98.85%。

The liquid-liquid equilibrium data for system of acrylonitrile-water-potassium carbonate was determined at 25 ℃ . The results showed that the concentration of acrylonitrile could reach 98.85 % when the concentration of K2CO3 in the water phase was equal to 52.50 % .

结果如下：1.研究了四种助剂（碳酸钾，EDTA，酒石酸钾钠，丁二酸）对甲醇气相氧化羰基化催化剂性能的影响，并对催化剂活性物种的类型和助剂选择方法进行了探讨。

The results are summarized as follows : 1 . The effect of four kinds of promoters ( potassium carbonate , EDTA , potassium sodium tartrate tetrahydrate , succinic acid ) were investigated , further discussion about the activate species and the principles of selecting promoters were carried on .

报道了一种合成5芳亚叉基罗丹宁的新方法.由芳香醛与罗丹宁在碳酸钾水溶液中，于十六烷基三甲基溴化铵（CTMAB）存在下，室温搅拌生成。

A new synthesis procedure of 5 - ( arylmethylene ) rhodanines from aromatic aldehydes and rhodanine in K_2CO_3 water solution at room temperature and in the presence of Hexadecyltrimethylammonium bromide ( CTMAB ) is reported .

喷施2.5%碳酸钾溶液结合压扁处理，可明显加快苜蓿干燥速度，减少叶片损失，有效保存苜蓿干草营养成分，其总可消化营养物质（TDN）较对照处理提高5.6%。

Spraying chemical drying agents 2.5 % potassium carbonate solution combined with steam-pressing could significantly accelerate the drying rate , even could keep nutritive value and improve the quality of alfalfa hay . Thus the loss of leave was reduced efficiently .

进一步以2b-2d为原料，在碳酸钾存在下以丙酮为溶剂与咔唑反应，得到丙基桥连的杯芳烃咔唑衍生物3a-3c。

React with 2b-2d so as to acetone for the solvent and carbazole under potassium have in carbonic acid to step forward , get cup aromatic hydrocarbon carbazole derivative 3a-3c connected with in third base bridge .

首先，以镁粉和碳酸钾等为原料，采用粉末冶金法制备出孔径在100～200um，孔隙率在40～50%的具有连通孔洞的多孔镁。

Firstly , with the Mg powder , K_2CO_3 powder etc as raw material , the article made magnesium metallic foams by powder manufacturing process . The open-cellular foams have average characteristics : pore size : 100 ~ 200um , porosity : 40 ~ 50 % .

化肥厂用有机胺法生产碳酸钾新工艺的可行性分析

Feasibility Analysis on Potash Production from Amine by a Fertilizer Plant

本文简要介绍了用有机胺法生产碳酸钾的新工艺。

A new process for potash production from amine is briefed .

反渗透技术在碳酸钾生产废水处理中的应用

Application of reverse osmosis technique to wastewater treatment in K_2CO_3 production