硫酸化

Acrylic acid, starch and SPS were used as raw materials of solution polymerization to synthesize starch-g-acrylic acid superabsorbents interpenetrated with sodium PVA sulfate.

采用浓硫酸磺化法制备了聚乙烯醇硫酸钠；以丙烯酸、淀粉和SPS为原料采用水溶液聚合法合成了淀粉接枝丙烯酸－聚乙烯醇硫酸钠互穿网络高吸水性树脂。

In this paper, the latest progress of the nitration of deactivated aromatic compounds is reviewed in the point of view of nitrating agents, including nitrate-sulfuric acid, nitrate ester, nitric acid and nitrogen oxides.

本文从硝化试剂角度综述了近年来钝化芳环的硝化反应的进展，包括硝酸盐/硫酸、硝酸酯、硝酸、氮氧化物等硝化方法。

The results of flotation treatment on this samplewere very bad probably because of high concentration of slimes and silica (33.27% SiO2). Then flotation method was replaced by sulfuric acid leaching.

由于该氧化矿泥化严重，且SiO_2含量高达33.27%，传统的浮选方法所得的选矿指标很不理想，因此，改为硫酸浸出法处理该氧化锌矿。

The conventional method of sizing used soaped rosin and aluminum sulfate at acid condition , pH 4 to 5, which is so called acid sizing.

传统的施胶方法是利用皂化松香胶和硫酸铝在pH值为4～5的条件下进行的，即所谓的酸性施胶。

OBJECTIVE: To study the anticoagulant activity of the sulfated agarose with different relative molecular masses.

目的：观察不同相对分子质量硫酸酯化琼脂糖的抗凝血性能。

Purpose The aim is to sulfonize tea polysaccharides,and to evaluate the hypoglycemic effect of sulfated tea polysaccharides.

目的对茶多糖进行硫酸酯化分子修饰，并研究其降血糖活性。

RESULTS AND CONCLUSION: Two kinds of sulfated agarose had similar degree of substitution and sulfation position, whereas their molecular weight was different.

结果与结论：可以获得取代度及取代位置相似，具有不同相对分子质量分布的硫酸酯化琼脂糖。

Results The SiO2-ZrO2 composites were calcined at 200℃ prior to sulfating, the concentration of sulfuric acid was 1.0 mol/L ,the molar ratio of Si and Zr was 15, the calcination temperature was 500℃, the molar ratio of ethynol and lactic acid is 3/1, the yield of the ester could reach 92.7%.

结果SO4^2-／SiO2-ZrO2固体超强酸催化乳酸乙酯的合成反应适宜的反应条件为：预焙烧温度为200℃，浸泡硫酸浓度为1.0mol／L，硅锆摩尔比为15，焙烧温度为500℃，醇酸比为3时，酯化率可达92.79／6。

Challendor Chemical Co, focusing on manufacturing and trading raw natural oils as well as downstream products. In lubricant industry, we specialize in producing animal oil originated products, such as sulfurized synthetic esters, sulfurized lard, sulfonated lard, blown lard, etc.

上海骋德贸易有限公司专注油脂化学品的研发、代工生产与贸易，整合国内油脂化工企业资源，结合多年行业经验与应用技术探索，形成了以天然油脂、合成酯为源头，以硫化、磺化、硫酸化为技术专长，以润滑、乳化、复配为研究重点的企业技术特色，服务业内用户。

In the medium of H2SO4 with KBr as the catalyst, the color of Cresol Red oxidized by iodate can be faded, and the degree of color fading is proportional to the concentration of iodine and the linear range of determination is 20 μg/25 mL~50 μg/25 mL.

在硫酸介质中、在溴化钾催化条件下，碘酸根对甲酚红有褪色作用，且褪色的程度与碘酸根的量有关，碘定量测定的线性范围为20μg/25mL～50μg/25mL，检出限为6.57×10-1μg/25mL，回收率为98.1%～104.2%。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。