Synthesis of Butyl Acetate Catalyzed by Silica Supported Recovered Perfluorosulfonic Acid Resin SiO2载负回收全氟磺酸树脂催化乙酸丁酯合成
Catalysis degradation of cellulose macromolecule chain, caused by acidity of polycarboxylic acid can not be recovered and its strength loss is related to acid type, concentration, pH value, baking temperature and time. 由多元羧酸的酸性引起的纤维素大分子链的催化降解是不可恢复的,它的强力损失与酸的种类、浓度、pH值、焙烘温度和时间有关。
The bovine integrin β 1 gene was cloned from RNA of the lung tissue of recovered cattle infected experimentally with foot-and-mouth disease virus ( FMDV), and compared with the β 1 genes of other animals available in GenBank at nucleotide and amino acid levels. 从口蹄疫病毒试验感染康复牛肺组织中克隆了β1亚基基因,并对其核苷酸和推导氨基酸序列进行了比较分析。
The purity of c – Si3N4 reached 100% after the recovered samples were treated with hydrofluoric acid at 440 K for 9 ― 10 h. 回收样品在440K左右经9~10h与氢氟酸反应处理后,c–Si3N4粉体的纯度接近100%。
Preparation and application of recovered perfluorooctanoic acid 回收全氟辛酸的研制和应用
The membrane flux can be recovered over 98% after the fouled ultrafiltration membrane is treated by back flushing with treated water and flushing with dilute base, dilute acid, germicides ( such as NaClO) and treated water. 分别用超滤水反冲洗、稀碱、稀酸、杀菌剂(如NaClO溶液)和清水冲洗被污染的超滤膜,可使膜通量恢复到新膜的98%以上;
Camphene and isopropanol were recovered in presence of a solid acid catalyst from the oily by product given out by catalytic hydration of camphene to isoborneol. 对由树脂催化莰烯直接水合成异龙脑过程中的副产油,利用固体酸催化回收莰烯和异丙醇。
The waste acid from the manufacture of cation exchange resin can be successfully recovered and reused by a new washing process with dilute acid instead of traditional washing process with water. 采用稀酸套洗工艺代替传统的加水稀释洗涤工艺,成功地解决了阳离子交换树脂生产中废酸的回收利用问题。
To take advantage of sulfuric acid leaching solution, the magnesium was recovered at high temperature first, and then the boric acid was crystallized from the mother liquor. 对于硫酸酸解液的利用,不同于一般先进行低温结晶制备硼酸再回收利用硼酸母液中硫酸镁的工艺。
In the meanwhile, the silicon components in the filtrate have been recovered by hydrochloric acid treatment process. 同时,反应滤液中硅组分为主的滤出物通过盐酸处理得到了回收。