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- sulfurous acid anhydride 亚硫酸酐
- sulfuric acid anhydride 硫酐
- It is produced by the reduction of fuchsin by sulfurous acid, and is oxidized by aldehydes and ketones, restoring the magenta color of the fuchsin. 配法是用亚硫酸使品红溶液还原，若有醛酮类存在时便使之氧化而重新呈现品红本身的洋红色。
- N-Carboxy-alanine acid anhydride (NCA) was synthesized by L-alanine and Triphosgen. 摘要利用L-丙氨酸和三聚光气反应制备了N-羧基-丙氨酸-环内酸酐(NCA)。
- Phosphorus Pentoxide, also called Phosphoric Acid Anhydride, is a white, spiculate crystal. 五氧化二磷又名磷酸酐，白色针状晶体。
- The organic compounds are mainly benzoic acid anhydride, benzophenone, and so on. 生成的有机化合物成分比较复杂,主要成分有苯甲酸酐、二苯甲酮等。
- The cooking liquor, called acid, is thus a solution of calcium which contains an excess of sulfurous acid. 蒸煮所用酸液是一种含有过量硫酸的酸性亚硫酸钙的溶液。
- Compared with the amine curing agent, the casting epoxy resin cured by the acid anhydride has higher flashover voltage. 实验结果表明:酸酐固化的试样比胺类固化试样闪络电压要高；
- Sulfonated EPDM ionomers(S-EPDM) were prepared with concentrated sulfuric acid and acetic anhydride. 用浓硫酸和醋酸酐与三元乙丙橡胶 (EPDM)反应制备了磺化三元乙丙橡胶离聚物 (S -EPDM)。
- Most sulfuric acid is made by the contact process. 大多数的硫酸是用接触法制造的。
- The virulent matter such as the sulfurous acid and so on in fog is harmful to people's health, outside agriculture and metal material. 雾中含有亚硫酸等有毒物质,有害人们身体健康,有害室外农业和有损外露金属材料,属气象灾害。
- The effects of the poly(l,2-butadiene) oligomer carboxylated with maleic acid anhydride (MLPB) on the cork powder filled NBR and on the IIR recipes were researched in this paper. 本文简要介绍了马来酸酐化聚丁二烯(MLPB)在软木填充丁腈橡胶制品和丁基橡胶配方改性中的应用效果。
- The active cooking chemicals in the sulfite process are sulfur dioxide, sulfurous acid, and calcium bisulfite. 亚硫酸盐法制浆过程中活性化学物质是二氧化硫、硫酸以及酸性亚硫酸钙。
- Maleic anhydride is the important organic chemical material, is the third largest acid anhydride behind the phthalic anhydride and acetic anhydride. 顺丁烯二酸酐，简称顺酐或者马来酐，是重要的有机化工原料，是仅次于苯酐和醋酐的第三大酸酐。
- A corrosive solution of sulfur trioxide in sulfuric acid. 发烟硫酸含三氧化硫酸的一种腐蚀性溶液
- The paper introduces the reaction mechanism of oxidating sulfurous acid calcium to gypsum and some factors to influence the reaction process. 介绍了亚硫酸钙氧化为石膏的反应机理及影响反应过程的某些因素。
- Phthalein acid anhydride Photophobic pharmaceutical and has special protective action on the ultraviolet ray. It can cure sunlight dermatitis, eczema, etc. 酞酐避光剂，对紫外线具有特殊的保护功效，可治疗日光性皮炎，湿疹等。
- A lot of decomposition products are formed, such as dioxoimidazole, dioxopiperazine, acid anhydride, cyanuric acid, ammonium, four, five and six-membered ring lactam etc. 可能产生二氧咪唑环、毗嗪二酮、尿氰酸、铵盐及四元环、五元环和六元环内酰胺结构的产物。
- The adhesive made of epoxy resin, polyazelaic acid anhydride, 2,4-methylimidazole and modified agent.It can be solidified quickly at the middle temperature. 以环氧树脂、酸酐、咪唑等为主要原料并添加改性剂，配制了一种能在中温下快速固化的胶粘剂；
- The sulfonation reaction efficiency would reach a peak when the mole rate of acetic anhydride and concentrated sulfuric acid was 1.5. 磺化剂中乙酸酐与浓硫酸的摩尔比为1.;5:1时，平均磺化效率达到了最高；
