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- The optimal synthesis with polyphosphoric acid was put forward to produce high purity of phosphoric acid monoester,and its application was described. 介绍了磷酸单酯的各种合成工艺路线,并比较了它们的优缺点,提出了聚磷酸法是合成高纯度磷酸单酯的最佳路线。
- Ammonium persulfate and sulfuric acid were used to turn completely the polyphosphoric acid into orthophosphoric radicals, which were then determined by spectrophotometry. 可用过硫酸铵和硫酸将多聚磷酸全部转化成正磷酸根，再用分光光度法测定其质量分数。
- The active charcoal fibre has certain adsorption to the acid radical ion in the solution. 活性炭纤维对溶液中的酸根离子有一定的吸附作用。
- The growth of Bacillus bifidus could also be restrained by pH and the ion of acid radical. 又考虑到双歧杆菌的生长受到pH值和酸根离子的抑制。
- The maximum of standard deviation of its total acid radical content is 0.04mmol/g. its varying coefficient is 0.80%. 该方法重复性好;其总酸性基测定的最大标准偏差为0.;04mmol/g;变动系数为0
- WT5"BZ]Diindanone dibenzo 24 Crown 8 has been synthesized. on the conditions of polyphosphoric acid(PPA) as catalyst and solvent,acrylic acid as acylating agent,dibenzo 24 crown 8 being acylated. 以多聚磷酸 (PPA)为催化剂和反应溶剂 ,丙烯酸为酰化剂 ,对二苯并 -2 4 -冠 -8进行酰化 ,成功地合成了双茚满酮型二苯并 -2 4 -冠 -8。
- The results show that the migrating rate of citric acid radical is about 99 6% and it can be separated and enriched satisfactorily. 结果表明 ,柠檬酸根的迁移率达 99 6%25以上。
- Preparation of PBO was carried out by polymerization of salts that contained 4,6-diamino resorcinol dihydrochloride(DAR) and terephthalic acid(TPA) in polyphosphoric acid(PPA) and P2O5. 以4,6-二氨基间苯二酚盐酸盐(DAR)和对苯二甲酸(TPA)制成复合盐,再以多聚磷酸为溶剂,添加五氧化二磷,制备出PBO聚合物。
- The paper shows the ideal synthetic condition for preparing the novel amphoteric surfactant of monoalkyl phosphate by long-chain fatty acid, diethanolamine and polyphosphoric acid. 本文研究了以脂肪酸、二乙醇胺、聚磷酸为原料合成一种新型的两性磷酸酯盐表面活性剂的方法。
- WT5”BZ]Diindanone dibenzo 24 Crown 8 has been synthesized. on the conditions of polyphosphoric acid(PPA) as catalyst and solvent,acrylic acid as acylating agent,dibenzo 24 crown 8 being acylated. 以多聚磷酸(PPA)为催化剂和反应溶剂,丙烯酸为酰化剂,对二苯并-24-冠-8进行酰化,成功地合成了双茚满酮型二苯并-24-冠-8。收藏指正
- Considering the low corrosiveness of polyphosphoric acid to the stainless steel,the combustion chamber,which was made of stainless steel without inner lier,was used in the two-step method process. 利用多聚磷酸对不锈钢的低腐蚀特性,在二步法工艺中采用无衬里不锈钢燃磷塔。
- Ingredient ：The plant polysaccharide, two palm acid radical lecithin, the oxyproline, the hyaluric acid sodium, the antiscorbutic acid sodium, the mannitol, reconstruct Collogen. 成份：植物多糖、二棕榈酰卵磷脂、羟基脯氨酸、透明质酸钠、抗坏血酸钠、甘露醇、重建胶原蛋白。
- Silicofluoride acid radical of the mother liquor will be transformed into sodium silicofluoride if excess sodium chloride was added,and the mother liquor was refined. 其关键技术为氯化钠脱硅:投入过量氯化钠,使母液中氟硅酸根转化成副产品氟硅酸钠,母液被精制;
- a salt or ester of polyphosphoric acid. 多磷酸形成的一种盐或酯。
- The acetic acid radical CH3CO. 乙酰基，醋酸基醋酸基
- In BPA production impurities in raw material phenol can poison mercaptan radical contained in resin catalyst, and sulphonic acid radical also in resin is easy to lose in higher temperature medium. 摘要巯基化树脂催化剂用于双酚A生产，易被原料苯酚中的杂质中毒，而且在较高的介质温度下磺酸基流失明显。
- Different catalyzer induces different morphology of samples: when weak acid such as HAc and H3PO4 is used as a catalyzer, the acid radical will form complex with precursor, and thus the viscosity is large and crystallization is poor. 不同催化剂得到的样品状态不同:弱酸HAc、H_3PO_4作催化剂时,会与前驱体络合,样品的粘度较大,结晶较差;
- In BPA production impurities in raw material phenol can poison mercaptan radical contained in resin catalyst,and sulphonic acid radical also in resin is easy to lose in higher temperature medium. 巯基化树脂催化剂用于双酚A生产,易被原料苯酚中的杂质中毒,而且在较高的介质温度下磺酸基流失明显。
- Liquid Crystalline of Cellulose in Polyphosphoric Acid 纤维素在多聚磷酸中的液晶性
- Keywords thiabendazole;polyphosphoric acid;synthesis; 噻苯咪唑;多聚磷酸;合成;
