In this paper,investigation has been made on the process for the synthesis of salicylaldehyde by esterification-oxidation with phenol,paraformaldehyde,boric acid as initial materials.

探索了以苯酚毛片在线播放网、硼酸和多聚甲醛為原料的酯化氧化法合成水楊醛的工藝路線1024在线看片你懂的，根據反應特點人人偷人人人操，改進了酯化反應方式www.avtv在线观看，采用了多聚甲醛氣態(tài)解聚法作為羥甲基化反應的進料方式pp.94在线免费，探討了羥甲基化反應溫度三级色网站在线、多聚甲醛原料含水量、催化氧化反應催化劑用量對反應收率的影響并得到最佳反應條件猛操视频，水楊醛收率為60.5%www.cn.com黄色视频，純度達98%以上。

Sodium perborate as a safe, cheap, mild, versatile and environmentally friendly oxidant has been widely used in organic synthesis.

過硼酸鈉作為一種安全产国69囗交视频国产、廉價免看一级a一片—综合另类、溫和、多用途和對環(huán)境友好的氧化劑在有機合成中得到愈來愈廣泛的應用日韩美女偷自拍视频网站在线观看免费。

The perborate bleaches are not used commercially but are available for use by the consumers. Their bleaching action is similar to that of hydrogen peroxide.

過硼酸鹽在工業(yè)生產中并不使用久久99国产免费观看99一区，但可供消費者使用，它們的漂白作用與過氧化氫相似A级毛片误无码免费真人久久。

The perborate bleaches aer not used commercially but are available for use by the consumers. Their bleaching action is similar to that of hydrogen peroxide.

過硼酸鹽在工業(yè)生產中并不使用中文痉挛视频在线播放，但可供消費者使用，它們的漂白作用與過氧化氫相似干操美女。

The bleaching performance of the in-situ produced peroxide with sodium perborate and sodium percarbonate on deinked pulp was compared with that of general peroxide in this paper.

介紹了采用過硼酸鈉和過碳酸鈉就地產生H2O2與通常的采用H2O2水溶液進行脫墨漿漂白效果的比較與評價日本操逼视频不卡。

Common bleaching agents are hydrogen peroxide, sodium hypochlorite, sodium chlorite and sodium perborate.

常用的漂白劑有過氧化氫、次氯酸鈉无码日韩免费专区迅雷下载、氯化鈉以及過硼酸鈉毛片一级农村毛片。

Based on trichlorfon-catalyzed reaction of benzidine- sodium perborate by single sweep oscillopolarography, a new method is proposed for the determination of trichlorfon.

用單掃描極譜方法研究發(fā)現敵百蟲催化聯苯胺過硼酸鈉體系產生一靈敏的還原峰，其峰電位為-0.7V黄色网站在哪里，峰電流與敵百蟲的濃度在8×10-7～1×10-4mol/L范圍內呈良好的線性關系(r=09991)98偷窥自拍亚洲色图，據此提出了一種檢測敵百蟲的新方法。

A teasaponin is extracted from the tea seed,and then a well-behaved washing assistant is prepared by the teasaponin blended with sodium perborate .

通過從茶籽餅粕中提取茶皂素小黄片大全，并將其與過硼酸鈉進行復配進而制取性能良好的洗滌助劑cao97。

Suitable cleaning methods known in the art include rinsing in organic solvent, rinsing with aqueous detergent solution, mechanical abrasion such as sand-blasting, micro-etching with aqueous acids (eg HCl and H 2 SO 4 ) and aqueous oxidative cleaning with, for example, persulphate or perborate.

適當的清洗在藝術已知的方法包括在有機溶劑，與水清洗劑溶液沖洗欧美黑人巨大又粗又长，機械磨損，如噴砂毛片.com，微蝕刻與水酸（如鹽酸和H 2 SO 4計）和水的氧化清洗美女福利操一操，例如，91精品视频在线无码，過硫酸鉀或過硼酸鹽日韩AV无码久久一区二区。

By the state-level key high-tech enterprises - Jinke Technology Group Holdings initiated the establishment of the Company, Ltd., founded in May 2001, is located in China's economy the most dynamic Yangtze River Delta, Hangzhou Bay the south bank of Hangzhou Bay Fine Chemical Park, adjacent to Shanghai Port and Ningbo Port, is the factory covers an area of 880 acres, with more than 600 employees, specializing in the production of sodium percarbonate, tetraacetylethylenediamine, sodium perborate, solid peracetic acid and sodium acetate.

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