OBJECTIVE Acetaldoxime was prepared by using acetaldehyde and hydroxylamine sulfate as main materials then methylthio acetaldoxime was synthesized by using the former products as main material.

目的本文研究了以乙醛和硫酸羥胺為主要原料合成乙醛肟国产一级A片午夜无码免费古装，并以乙醛肟為原料合成甲硫基乙醛肟的工藝亚洲一级女性黄色生活。

It shown that PDC does not only catalyze the production of acetaldehyde (PDC's main activity), but also catalyzes an aldoltype condensation reaction in which the hydroxyethyl-ThDP intermediate of enzyme is condensed with a second acetaldehyde to form acetoin.

在研究中發(fā)現(xiàn)PDC不僅能催化產(chǎn)生乙醛免费,欧美一级视频，還具有醛連接酶的活性。即將二個(gè)乙醛分子縮合成3-羥基丁酮91超碰在线播放啪，盡管這個(gè)活性比產(chǎn)生乙醛的活性低得多亚洲精品国产aV成拍色。

The emphasis was on chemical properties,application,main production methods,market,and prospects of main deriva- tives of acetaldehyde such as ethyl acetate,pentaerythritol,glyoxal,peracetic acid, crotonaldehyde and pyridine.

介紹了國內(nèi)外乙醛及其主要衍生物的生產(chǎn)技術(shù)發(fā)展及其市場供需狀況，尤其對(duì)乙醛主要衍生物乙酸乙酯偷拍网站网址、季戊四醇香蕉黄色a级在线特级毛片、乙二醛、乙醛酸伊人无码一区二区、丁烯醛www.天天操、吡啶的化學(xué)性質(zhì)與用途、主要生產(chǎn)方法正品毛片黄片、市場供需狀況及開發(fā)前景作詳細(xì)介紹和分析亚洲第一区二区在线观看。

The standard curves for glyoxal and glyoxalic acid both had good linear relations in the ranges of 2~20 mg/L and 10~100 mg/L, respectively.

乙二醛質(zhì)量濃度在2～20 mg/L范圍內(nèi)，乙二醛二腙的峰面積與乙二醛的質(zhì)量濃度之間呈良好的線性關(guān)系国产精品三区视频；乙醛酸質(zhì)量濃度在10～100 mg/L范圍內(nèi)狼狠亚洲综合狼狼久久，乙醛酸腙的峰面積與乙醛酸的質(zhì)量濃度之間呈良好的線性關(guān)系。

This catalyst was applied for the liquid phase oxidation of glyoxal to glyoxylic acid.

研究結(jié)果表明国外黄片免费视频，V_2O_5/C催化劑對(duì)乙二醛的氧化具有良好的催化活性和乙醛酸選擇性国产丶欧美丶日本不卡视频，反應(yīng)過程中無需控制溶液pH值即可得到乙醛酸，乙醛酸在V_2O_5/C催化劑作用下不存在過度氧化中国黄色中文字幕，乙二醛的氧化產(chǎn)物主要是甲酸和乙醛酸爱爱人人操，它們是一平行反應(yīng)。

The glyoxal and glyoxalic acid contents in the solution of oxidation of acetaldehyde to glyoxal by nitric acid were determined by this method, the repeatabilities of analysis results were excellent and the relative error compared to chemical analysis of glyoxal was 1.77%.

用HPLC測定乙醛硝酸氧化法制乙二醛反應(yīng)液中乙二醛和乙醛酸的含量91精品在线国产，結(jié)果的重復(fù)性好我要看一级免费毛片我要看一级免费毛片看；對(duì)乙二醛的測定結(jié)果與應(yīng)用化學(xué)分析法測定結(jié)果的平均相對(duì)誤差為1.77%；對(duì)反應(yīng)液中乙二醛18岁以下禁止看的黄色视频、乙醛酸含量的測定有著較高的加標(biāo)回收率禁止十八岁进入的网站，分別為99.6%～103.3%和98.1%～102.4%。

In this process, the electrolylic bath with cationic exchange membrance and leas electrode is used. The cathode liquor is oxalic acid, the anode liquor is diluted sulfuric acid. The process above has following advantages with high yield, top quality, lower cost, no "three wastes" pollution, and no oxalic aldehyde in the product. It is a cleaner and environment-friend technology, and is a development trend for production of glyoxalic acid. Complete analytical process for raw materials, intermediate and final products were established.

本論文通過對(duì)乙醛酸合成路線的研究国产无码三级片网站，確定了草酸電解法制乙醛酸的工藝路線，此法采用裝有陽離子交換隔膜和鉛電極的電解槽免费A片大片av观看不卡,，陰極電解液為草酸溶液欧美性爱色，陽極電解液為稀硫酸毛片片在线，該工藝具有產(chǎn)品收率高、質(zhì)量好国产精品无码视频一本、成本低三级视频在线免观看、無三廢污染、產(chǎn)品中無乙二醛等特點(diǎn)www26uuu.com，是一條清潔国产欧美性爱另类在线、綠色工藝，是生產(chǎn)乙醛酸的主要發(fā)展方向自拍网在线视频。

This paper introduced the typical application of glyoxylic acid in the synthesis of fine chemical products and the basic manufacture method.

本文介紹了乙醛酸在精細(xì)化學(xué)品合成中的典型應(yīng)用和乙醛酸的基本生產(chǎn)方法免费无遮挡无码视频观看，并比較了不同生產(chǎn)方法的各自特點(diǎn)，同時(shí)分析了乙醛酸的市場情況国产亚洲欧美日韩在线区，指出了高質(zhì)量乙醛酸將具有良好的市場前景一级A片黄片午夜、。

By using catalysts based on sodium nitrite, hydrochloric acid and sodium nitrite, cerium dioxide and sodium nitrite, and cupric nitrate and sodium nitrite correspondingly.

結(jié)果表明，用亞硝酸鈉作催化劑乙醛酸產(chǎn)率為73.9%亚洲欧美二区激情，鹽酸和亞硝酸鈉作催化劑時(shí)乙醛酸產(chǎn)率為84.6%欧美亚洲综合图片区，二氧化鈰和亞硝酸鈉作催化劑時(shí)乙醛酸產(chǎn)率為80.2%，硝酸銅和亞硝酸鈉作催化劑時(shí)乙醛酸產(chǎn)率為78.2%久久精品精品久久。

The following main results are obtained: The TiO_2 photocatalyst with small crystallite size, high surface area, narrow and uniform pore size distribution, and microporous frameworks could be prepared out by applying MW radiation in the preparation process. The microwave-induced fluorescence technique verified for the first time that microwave enhanced the formation rate of hydroxyl radical, leading to the increase in the photocatalytic efficiency. Compared with the conventional catalyst, TiO_2 prepared by MW dielectric heating owns a higher UV absorption ability, and its optical absorption edge and photovoltaic response are shifted toward the short wavelength region, resulting in increase of photooxidation efficiency. The photocatalytic conversion and the mineralization ratio of acetaldehyde are increased respectively by 30% and 40% over the TiO2 prepared by MW radiation when compared to the TiO2 prepared by the conventional heating. For the MW-assisted photocatalytic reaction over the MW-prepared TiO2, production of hydroxyl radicals is enhanced by 22.5%, and the photocatalytic conversion is accordingly increased by 20%. Similarlly, applying MW also increased the photocatalytic conversion and the mineralization ratio of acetaldehyde over TiO2/Al2O3 sample.

論文得到如下主要結(jié)果和結(jié)論：(1)微波介電加熱TiO_2 溶膠可得到晶粒度小18禁无遮挡啪啪无码网站免费看、光催化活性高、比表面積大和孔徑分布窄而均一天天日天天曰天天透一区二区三区，且微孔發(fā)達(dá)的TiO_2光催化劑黄色福利网站在线；在溶膠干燥處理過程中微波可使催化劑表面缺陷增加，進(jìn)而導(dǎo)致光催化反應(yīng)過程有更多的活性羥基自由基產(chǎn)生桃色阁；(2)微波制備能顯著增強(qiáng)TiO_2 樣品的紫外光吸收率久久亚洲一级无码毛片，并使其光吸收和光伏響應(yīng)閾值發(fā)生藍(lán)移，從而提高TiO_2的氧化還原能力91国自产视频在线观看；(3)與常規(guī)加熱法所制TiO_2比較久久久免费黄色视频不卡，微波法制備的TiO_2對(duì)乙醛的光催化降解轉(zhuǎn)化率提高30%，CO_2生成率提高40%以上日韩欧美色图小说综合站；(4)與未加微波輻射時(shí)相比18禁无码免费高黄肉网站，發(fā)現(xiàn)在光催化反應(yīng)過程中施加微波，TiO_2 的羥基自由基生成速率提高了22.5%人人操人人搞人人爱，相應(yīng)CH_3CHO 光催化降解轉(zhuǎn)化率提高了20%国产白白在线；對(duì)Al_2O_3/TiO_2催化劑，CH_3CHO 光催化降解轉(zhuǎn)化率甚至提高了33%黄色网站啊啊啊爽插，同時(shí)CO_2 的生成率也都大幅度提高粗硬大西欧一级毛片；(5)微波輻射可改變光催化降解乙醛的產(chǎn)物分布，推斷施加微波時(shí)乙醛光催化降解按照羥基自由基引發(fā)的鏈?zhǔn)椒磻?yīng)機(jī)理進(jìn)行，微波&非熱效應(yīng)&起主要作用黄a频美女网站网站频a。

acetaldehyde：乙醛

毒理 乙醛(acetaldehyde)系無色具有刺激性氣味且易揮發(fā)的液體,易燃、易爆易溶于水及有機(jī)溶劑. 乙醛主要應(yīng)用于化工合成国产一区在线在线播放、皮革18岁的男人看黄色视频、香料或造紙等工業(yè). 乙醛屬于微毒類,對(duì)組織細(xì)胞可產(chǎn)生抑制作用,若高濃度吸入亦可導(dǎo)致心、肝精品九九九在线视频免费看、腎病變.

acetaldehyde phenylhydrazone：乙醛苯

acetaldehyde hydrogensulphite 乙醛合亞硫酸氫鹽 | acetaldehyde phenylhydrazone 乙醛苯 | acetaldehyde sodium hydrogensulphite 乙醛合亞硫酸氫鈉

acetaldehyde resin：乙醛樹脂

acetaldehyde cyanohydrin 乙醛氰醇 | acetaldehyde resin 乙醛樹脂 | acetaldehyde 乙醛

acetaldehyde resin：乙醛樹脂 聚甲醛樹脂

acetaldehyde phenylhydrazone | 乙醛苯腙 | acetaldehyde resin | 乙醛樹脂 聚甲醛樹脂 | acetaldehyde sodium bisulfite | 乙醛合亞硫酸氫鈉

acetaldehyde cyanohydrin：乙醛 醇

acetaldehyde 乙醛 | acetaldehyde cyanohydrin 乙醛 醇 | acetaldehyde hydrogensulphite 乙醛合亞硫酸氫鹽

chloralism：[化]習(xí)慣性使用三氯乙醛, 三氯乙醛中毒癥

modulus principle 模原理 | chloralism [化]習(xí)慣性使用三氯乙醛, 三氯乙醛中毒癥 | perazine [藥]甲哌丙嗪

chloralism：習(xí)慣性使用三氯乙醛, 三氯乙醛中毒癥

chloralide | 氯醛交酯 | chloralism | 習(xí)慣性使用三氯乙醛, 三氯乙醛中毒癥 | chloralkane | 氯代烷烴

acetaldehyde mutase：乙醛變位

"乙醛去氫","acetaldehyde dehydrogenase" | "乙醛變位","acetaldehyde mutase" | "乙醛","acetaldehyde,ethanal"

ethanal：乙醛

含甲醛37~40%男女啪啪视频入口欧美国产、甲醇8%的水溶液叫做(2)乙醛: 乙醛(ethanal)是無色的有刺激氣味的低沸點(diǎn)液體,可溶于水、乙醇和乙醚中,易氧化,易聚合. 乙醛是合成乙酸aigao激情在线视频、乙酐深夜15级A毛片免费视频、三氯乙醛、季戊四醇等多種化合物的重要原料. 工業(yè)上由乙炔加水或由乙烯美女黄色视频免费在线一级、乙醇氧化劑制備.

phenylacetaldehyde：苯乙醛

另外本公司還可以提供其他規(guī)格的純品型和溶液型的苯乙醛(Phenylacetaldehyde). 儀器信息網(wǎng)上的苯乙醛(Phenylacetaldehyde)報(bào)價(jià)和型號(hào)規(guī)格為參考報(bào)價(jià)和型號(hào)規(guī)格,如需購買苯乙醛(Phenylacetaldehyde)請(qǐng)來信來電咨詢,苯乙醛(Phenylacetaldehyde)的報(bào)價(jià)以相關(guān)業(yè)務(wù)員給您