苯甲醛

The optimun technological conditions were studied on the synthesis of 9-flourenylmethanal by the reaction of flouren and ethyl formate , and the synthesis of 9-flourenylmethanol by the reaction of 9-flourenylmethanal and methanal with sodium ethylate as catalyst.

研究了乙醇钠为催化剂，由芴与甲酸乙酯合成芴甲醛，再由芴甲醛与甲醛合成苯甲醇的工艺条件，结果表明：合成芴甲醛时，当芴为 16g时，催化剂乙醇钠 4 。

OBJECTIVE TO study the quality of phthaladehyde and to design scientific system of phthalaldehyde formulation .the results demonstrate the phalaldehyde solution is stable and high germicide activity.

目的 通过对邻苯二甲醛特性的研究，科学地设计邻苯二甲醛的制剂体系，结果产生了稳定高效的杀菌活性。

With the addition of hexamethylenetetramine, an ambient pressure drying technique was developed for the fabrication of resorcinol-formaldehyde-based carbon aerogels.

以间苯二酚和甲醛为反应物、六次甲基四胺HMTA为催化剂、去离子水为溶剂，所合成的间苯二酚－甲醛凝胶能够在常压条件下直接进行干燥得到有机气凝胶；并经炭化，得到炭气凝胶。

Formaldehyde is absorbed by an acidic saturated solution of 2,4-dinitrophenyl hydrazine and converted to its hydrazone; the hydrazone is then extracted with CS2 and quantitated by GC.

利用尾气中的甲醛与2，4-二硝基苯肼酸性饱和溶液反应生成甲醛腙的特性，通过检测甲醛腙的浓度来检测尾气中的甲醛含量。

The long-term inhalation lf harmful gas such as formaldehyde,benzene,xylene given off from the coatings may harm the immune system and cause leucocythemia,They are especially sensitive to women and children,Pregnant women inhaling benzene may cause malformed baby or abortion .

涂料中的甲醛、苯、二甲醛等释放出的有毒气体，长期吸入人体会损害人体免疫功能，导致白血病，尤其妇女、儿童最为敏感，而孕妇吸入苯会导致胎儿畸形或流产。

In the second approach, terephthalaldehyde was also used as starting material, which reacted with cyanoacetic acid in pyridine to afford tetra-nitrile compound.

在第二种合成路线中，我们仍然以对苯二甲醛为起始原料，对苯二甲醛与氰基乙酸反应得到四氰基化合物8，再经过官能团转换、还原、亲核取代、分子内Friedel-Crafts反应得到中间体H〓TTPR。

Four novel methoxycarbonylindole-3-carboxaldehyde phenylhydrazone s were synthesized by the condensation reaction between methoxycarbonylindole-3-carboxaldehyde and phenylhydrazine in acidic condition.

甲氧羰基吲哚-3-甲醛与苯肼在酸性条件下通过缩合反应合成了4个未见文献报道的新化合物甲氧羰基吲哚-3-甲醛苯腙，其结构经1HNMR，IR和MS确证。

Four novel methoxycarbonylindole-3-carboxaldehyde phenylhydrazones were synthesized by the condensation reaction between methoxycarbonylindole-3-carboxaldehyde and phenylhydrazine in acidic condition.

甲氧羰基吲哚-3-甲醛与苯肼在酸性条件下通过缩合反应合成了4个未见文献报道的新化合物甲氧羰基吲哚-3-甲醛苯腙，其结构经1HNMR，IR和MS确证。

The optimun technological conditions were studied on the synthesis of 9-flourenylmethanal by the reaction of flouren and ethyl formate , and the synthesis of 9-flourenylmethanol by the reaction of 9-flourenylmethanal and methanal with sodium ethylate as catalyst.

研究了乙醇钠为催化剂，由芴与甲酸乙酯合成芴甲醛，再由芴甲醛与甲醛合成苯甲醇的工艺条件，结果表明：合成芴甲醛时，当芴为 16g时，催化剂乙醇钠 4 。5g ，甲酸乙酯 66ml，反应时间为 36h ，收率 75 %：合成芴甲醇时，当芴甲醛为 19g时，甲醛 7.0ml，10 %NaOH溶液 70ml，反应时间 2 。0h ，收率：63

An improved Adler method was used for preparing TAPPH〓. TAPPH〓 was synthesized in high yield by direct condensation of pyrrole with 4aminobenzaldehyde in refluxing propanoic acid with the presence of vitamin C. This new synthetic strategy for preparing TAPPH〓 can greatly extend synthetic methods for porphyrins containing amino groups.

我们通过对Adler法的合成条件进行改进，即在反应体系中加入还原剂Vc，由4-氨基苯甲醛直接合成了对酸敏感的TAPPH〓（1），提高了总收率，拓宽了Adler法的适用范围。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。