氢氧化钠

The fast gelable CS/GPS solutions at 37℃can be obtained by increasing the concentration of GPS and pH of solutions through dissolved GPS into dilute NaOH solution.

增大甘油磷酸钠的浓度，并将甘油磷酸钠溶于氢氧化钠稀溶液中来提高混合溶液的pH值，可得到在37℃下快速凝胶化的CS/GPS体系。

When hydrochloric acid was added into saccharin sodium solution,chemical reaction happened,whose product was glucide,which cannot be dissolved in water,however,it can be dissolved by ethyl acetate,therefore glucide can be extracted from other components,then can be determined by titration with sodium hydroxide.

利用糖精钠与盐酸反应生成不溶于水而溶于乙酸乙酯的物质，将其萃取出来，然后再利用氢氧化钠对其进行滴定分析，采用二分试差法准确测定了某镀光亮镍添加剂中糖精钠及某镀光亮镍液中糖精钠的含量，分别为88。

Moreover, the crossed experiment has been performed to determine the optimum condition: the molar ratio of glyoxylic acid to o-ethoxyphenol to sodium hydroxide 1.0:1.2:2.5, sodium hydroxide concentration 2mol/L, temperature 50℃, time 5h.

通过正交实验确定了合成的最佳条件：n：n：n=1.0：1.2：2.5，氢氧化钠浓度2mol/L，温度50℃，时间5h。

Glyoxylic acid was prepared by reaction of sodium hydroxide surplus with methyl dichloroacetate in methanol solution via neutralization of filtrate with 50 percentage sulfuric acid to pH 2～3 and hydrolyzation after separation of salts.

二氯乙酸甲酯和过量的氢氧化钠在甲醇溶液中反应，滤出氯化钠后，直接加入适量的 5 0 %的硫酸调 pH值为 2～ 3，滤出硫酸钠，蒸馏回收甲醇，水解、浓缩，得到不含乙二醛的 4 0 %乙醛酸溶液。

Water, Sodium Laureth Sulfate, Cocamidopropyl Betaine, Cocamide MEA, Disodium Cocamphodiacetate, Sodium Lauryl Sulfate, PEG 40 Hydrogenated Castor Oil, Perfume, Sodium Chloride, Propylene Glycol, Quaternium 80, Methylparaben, Polyquaternium 10, Hydroxypropyl Guar Hydroxpropyltrimonium Chloride, Citric Acid, Diazolidinyl Urea, Tetrasodium EDTA, Polyquaternium 7, Propylparaben, Sodium Hydroxide, Panthenol, Persea Gratissima Oil, Penta Sodium Pentetate, Hedera Helix Extract, Bambusa Vulgaris Extract

水，月桂醇聚醚硫酸酯钠，椰油酰胺丙基甜菜碱，椰油酰胺MEA，椰油酰两性基二乙酸二钠，月桂醇硫酸酯钠，PEG 40 氢化篦麻油，香料，氯化钠，丙二醇，季铵盐-80，苯甲酸甲脂，聚季铵盐-10，羟丙基瓜尔胶羟丙基三甲基氯化铵，柠檬酸，重氮烷基咪唑脲，乙二氨四醋酸四钠，聚季铵盐-7，对羟基苯甲酸丙酯，氢氧化钠，泛酰醇，酪梨油，喷替酸五钠，常春藤萃取物，银竹萃取物。

Heptanone was synthesized from n - butyl aldehyde and propanone via cross al-dol condensation, dehydration, catalyzed hydrogenation.

用氧化镁或氧化钙负载氢氧化钠固体碱作缩合催化剂，钯/炭作为加氢催化剂，由丁醛和丙酮经交叉酮醛缩合、脱水、催化加氢制得2-庚酮。

The molecular sieve is prepared in the steps: at the room temperature, hexadecyl trimethyl ammonium bromide is mixed and dissolved with the sodium hydroxide, and is added with TEOS in dropping way, and simultaneously added with Me metal salt water solution and lanthanum nitrate solution in dropping way; the pH value of the mixed solution is adjusted by acetic acid to be 10 to 11, and is mixed for 1 to 2 hours after being stabilized; the sol is moved into a polyfluortetraethylene bottle to be heated and crystallized for 2 days in the oven at the temperature of 100 DEG C; after filtering, washing and drying for nights, and being calcined in a muffle at the temperature of 550 DEG C for 3 to 7 hours, the dual-metal-atom improved MCM-41 mesoporous molecular sieve is obtained.

该分子筛的制备为室温下，将十六烷基三甲基溴化铵和氢氧化钠混合溶解，搅拌并滴加入TEOS，同时滴加入Me金属盐水溶液和硝酸镧溶液并搅拌，用乙酸调节pH值至10～11，稳定后搅拌1～2小时，溶胶转入聚四氟乙烯瓶中在100℃下烘箱水热晶化2天，经过滤、洗涤、干燥过夜，马弗炉550℃焙烧3-7h，得双金属原子改性MCM-41介孔分子筛产品。

Therefore can pass to use the cupric sulfate sulfuric acid potassium for the catalyst take sulfuric acid as to carry the body to digest it, make the amino acids chelate match the conversion for dissolve sex easily of ammonium sulfate and white vitriol, then absorb a fixed amount to try the kind to join 40% sodium hydroside combine under the steam heat function make ammonia the spirit swims to leave out, through cool off to respond the born boric acid with boric acid, be got the total nitrogen content by the standard aqua titration of hydrochloric acid immediately after;But the white vitriol can immediately join the hydrochloric acid hydroxylate , fluoride to turn the in order to cover up, carry on the titration but get the content of its zinc with the EDTA mark liquid..

因此可以通过用硫酸铜硫酸钾为催化剂以硫酸为载体将其消化，使氨基酸螯合锌转化为易溶性的硫酸铵和硫酸锌，然后吸取一定量的试样加入40 %的氢氧化钠并在水蒸气高温作用下使氨气游离出来，经冷却与硼酸反应生成硼酸铵，接着由盐酸标准溶液滴定得到总氮含量；而硫酸锌即可加入盐酸羟铵、氟化氢铵为掩蔽剂，用EDTA标液进行滴定而得到其锌的含量。

The technology of synthesizing 2,2,4-trimethylpentane-1,3-diol using industrial isobutyraldehyde and sodium hydroxide is researched in this paper.

以工业异丁醛和氢氧化钠合成了2，2，4-三甲基-1，3-戊二醇。

Results There were about 15 kinds of chemical poisons including vinyl chloride,polyvinyl alcohol,isoparaffin,polyvinylacetate,sodium hydrate,ammonia,acid hydroc,methanol,diesel oil,carbon monoxide,carbon dioxide,sulfur dioxide,nitrogen oxides,ozo...

结果在聚氯乙烯的生产过程中，作业场所存在化学毒物较多，主要包括氯乙烯、聚氯乙烯、聚乙烯醇、过氧化物、异链烷烃类、聚乙烯乙酸酯、氢氧化钠、氨、盐酸、甲醇、柴油、一氧化碳、二氧化碳、二氧化硫、氮氧化物、臭氧、二氧化锰等。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。