氯酸锂电解液中高氯酸锂的分光光度测定

在氯酸锂电解液中,用硫酸亚铁使氯酸盐还原,当ｐＨ＝３～４时,用苯萃取ＬｉＣｌＯ４灿烂绿络合物,测定了高氯酸锂。在２５ｍＬ萃取液中,ＬｉＣｌＯ４于２～１００μｇ范围内遵守比尔定律。大量Ｎａ＋,Ｋ＋,Ｍｇ２＋,Ｐｂ２＋,Ｍｎ２＋,Ｆｅ３＋,Ｆ－,Ｃｌ－,ＳＯ２－４,ＣＨ３ＣＯＯ－和少量的ＣｒＯ２－４不影响测定。该法也可用于氯酸盐产品中微量高氯酸根的测定     

纤维素基磁性聚偕胺肟树脂的研究：II.贵金属配阴离子在BMAO上？…

纤维素基磁怀聚偕胺树脂（ＢＭＡＯ）吸附ＡｕＣｌ＾－４，ＩｒＣｌ＾２－ｇ，ＰｄＣｌ＾２－４和ＰｔＣｌ＾２－６等贵金属配阴离子符合Ｆｒｅｕｎｄｌｉｃｈ等式和Ｌａｎｇｎｕｉｒ等温吸附方程。动力学研究表明，吸附同属二级反应，但本质不同，粒内扩散是吸附速度的控制阶段。测定了浓集因素，分配系数，吸附效率及ｐＨ值变化对吸附容量的影响，从扫描电镜观察论证了ＡｕＣｌ＾－４和ＩｒＣｌ＾２－６在ＢＭＡＯ上吸附时发生的氧     

K2SO4—NH4Cl—H2O体系物性数据的测定

系统地测定了不同温度下Ｋ２ＳＯ４－ＮＨ４Ｃｌ－Ｈ２Ｏ体系的密度、粘度、导电率和ｐＨ值，并研究了温度和氯化铵对硫酸钾饱和溶液的上述参数的影响。     

Cr_2O_3在SiO_2-Al_2O_3-MgO-B_2O_3系玻璃和玻璃陶瓷中的作用

利用ＳＭＥ和ＸＲＤ等技术,系统研究了Ｃｒ２Ｏ３对ＳｉＯ２－Ａｌ２Ｏ３－ＭｇＯ－Ｂ２Ｏ３系玻璃和玻璃陶瓷中的作用。当Ｃｒ２Ｏ３％＜１时,随着Ｃｒ２Ｏ３。含量的增加,玻璃试样的颜色由浅绿色逐渐转变成灰色;Ｃｒ２Ｏ３％＞１时,镁铬（铝）类晶石,Ｍｇ（Ａｌ１．５Ｃｒ０．５）Ｏ４,在玻璃试样中析出;在玻璃陶瓷中,Ｃｒ２Ｏ３％的含量的增加有助于Ｍｇ（Ａｌ１．５Ｃｒ０．５）Ｏ４相的析出,对云母晶体的析出有抑制作用。同时还发现Ｃｒ２Ｏ３的含量对云母晶体显微组织也有显著的影响作用。     

前驱体热解法制备高纯超细α-Al2O3粉体

利用ＮＨ４Ａｌ（ＳＯ４）２和ＮＨ４ＨＣＯ３为原料,控制适当的反应物配比和反应体系的ｐＨ值,制得ＮＨ４ＡｌＯ（ＯＨ）ＨＣＯ３前驱体化合物。在一定的温度下热解,最终制得活性超细α－Ａｌ２Ｏ３粉体,ＴＥＭ测得粉体粒径约５￣２０ｎｍ。ＩＣＰ分析结果表明：该粉体的Ａｌ２Ｏ３含量高达９９．９８％。     

聚烯烃表面氧化处理的研究

研究了以高锰酸钾或重铬酸钾／水／浓硫酸＝５∶８∶１００（质量比）或２０％（质量分数）的过硫酸铵水溶液及氯化铁或硫酸铜作为催化剂对聚烯烃进行的表面氧化处理,并通过熔点和红外光谱及光电子能谱等方法对氧化反应和产品的结构进行了表征。研究表明,最佳氧化温度和时间分别为４５℃～６０℃与４５ｍｉｎ;用ＫＭｎＯ４／Ｈ２ＳＯ４／ＦｅＣｌ３／ＣｕＳＯ４,Ｋ２Ｃｒ２Ｏ７／Ｈ２ＳＯ４／ＦｅＣｌ３,Ｋ２Ｃｒ２Ｏ７／Ｈ２ＳＯ４／ＣｕＳＯ４体系对聚乙烯的氧化中,氧化深度依次减小,Ｃ原子的摩尔分数由未氧化时的８０．８０４％,分别降低为３１．９０７％、６９．９０５％和７８．６６９％;在ＦｅＣｌ３催化下,产品中Ｃｌ的含量普遍增加,而以ＫＭｎＯ４／Ｈ２ＳＯ４／ＦｅＣｌ３／ＣｕＳＯ４氧化时增加最多,但对Ｋ２Ｃｒ２Ｏ７／Ｈ２ＳＯ４／ＦｅＣｌ３氧化体系,Ｏ含量的增加相对较多     

Al2O3—SiO2—SiC—C耐火材料的显微结构与抗渣性

研究了添加Ａｌ、Ｓｉ、Ｓｉ３Ｎ４、ＮＢ、Ｂ２Ｏ３和Ｂ４Ｃ的Ａｌ２Ｏ３－ＳｉＯ２－ＳｉＣ－Ｃ耐火材料在还原与化气氛下的显微结构与抗渣性。当碳的含量接近于还原性气氛时,含碳量控制着抗渣侵性,液相粘度影响着抗侵侵性。由于碳的间接氧化形成ＳｉＣ,ＳｉＴ Ｉ３Ｎ４对抗渣侵性有不利影响。Ｂ４Ｃ和Ｂ２Ｏ３由于生成大量易溶的含硼液体,因此它们对抗渣侵性也有不利影响,尤其是Ｂ４Ｃ。添加５％的Ａｌ和５％ＢＮ对抗渣侵性     

醛化液中芒硝测试方法的改进

以茜素红为指示剂，在ｐＨ＝３时加入蒸馏水，用ＢａＣｌ２直接滴定Ｎａ２ＳＯ４，加标回收率为９９．４％～１０２．４％，误差〈１％。     

混合稀土氧氯化物在冰晶石—NaF—Al2O3熔体中溶解度的研究

运用等温饱和法测定了混合稀土氧氯化物（ＲＥＯＣｌ）在冰晶石－ＮａＦ－Ａｌ２Ｏ３熔体中的溶解度。讨论了温度、冰晶石分子比、Ａｌ２Ｏ３对溶解度的影响。结果表明：ＲＥＯＣｌ的溶解度随温度的升高而增大；当有４％（Ｗｔ）Ａｌ２Ｏ３存在时，其溶解度相应减小；随着冰晶石分子比增加而增大。     

乙酸异丁酯合成中无机盐催化作用初探

研究了ＣｕＳＯ４．５Ｈ２Ｏ２、ＣｕＳＯ４、ＦｅＳＯ４、７Ｈ２Ｏ、ＦｅＣｌ３、６Ｈ２Ｏ、ＣｕＣｌ２．２Ｈ２Ｏ等５种盐对异丁醇与乙酸酯化反应的催化性能，结果表明ＦｅＣｌ３．６Ｈ２Ｏ和ＣｕＣｌ２．２Ｈ２Ｏ是较好的催化剂，酯转化率达８６－９３％。     

Catalyst systems for crease recovery finishing prior to pigment printing

In this study, sulphonic acid-based zwitterions are evaluated as an alternative catalyst system for the crease recovery finishing, using dimethyloldihydroxyethylene urea, of cotton fabric prior to pigment printing. Crease recovery finishing using a conventional catalyst, magnesium chloride, induces loss of pigment print definition attributed to the electrolytic thinning of polyacrylate-based synthetic thickener. However, such electrolytic thinning can be prevented by using aminomethane- or aminoethane-sulphonic acid. A combined catalyst of the latter with ammonium chloride is identified as an alternative catalyst for crease recovery finishing prior to pigment printing. The properties of finish and pigment print evaluated using this catalyst are improved without the loss of print definition.     

Assessment of the dyeing properties of pigments from Monascus purpureus

Monascus purpureus C322 was cultivated on well‐established production media to yield prevailingly red or orange pigment‐rich ethanolic extracts. Once these extracts had been diluted by an overall factor of 50, they were used as such to dye raw wool standard specimens differently premordanted using alum or stannic chloride. Independently of the mordant used, the specimens dyed with the red pigment‐rich extracts showed a pale red colour tending to pink, whereas the specimens dyed with the orange pigment‐rich extracts exhibited a more definite orange colour. By carrying out a few colourfastness standard tests (manual washing at 40 °C, acid and basic perspiration and hot pressing), stannic chloride‐premordanted wool specimens dyed with the red pigment‐rich extracts were found to be less resistant to acid and basic perspiration than their orange counterparts. Since the production of the orange pigment‐rich ethanolic extracts appeared to be more cost‐effective than that of their red counterparts, the former might support the present demand for colorants of natural origin in the textile sector. Copyright © 2005 Society of Chemical Industry     

Analysis of cosmetic dyes V identification of organic synthetic dyes in toilet soaps

The soap is fused in formic acid. Fatty acids are removed with heptane from which later the oil-soluble and some pigment dyes are removed by means of formic acid. The defatted solution of soap in formic acid is diluted and partly neutralized and therefrom the basic, pigment and some acid dyes are isolated with chloroform. Other acid dyes are isolated with help of benzalkonium chloride/chloroform or polyamide. Insoluble dyes are isolated by filtration followed by dissolving in one of the series of solvents. Separation and identification are achieved by means of thin-layer chromatography, absorption spectra and reactions.     

一串红色素的提取及其稳定性研究

研究了一串红色素的提取原理和方法,并对该色素的稳定性进行了验证。结果表明：该色素在酸性条件下对热、光均具有良好的稳定性,具有开发应用价值。     

Combined crease recovery finishing and pigment printing

The combined application of crease recovery finishing (using a dimethyloldihydroxyethylene urea-based finish) and pigment printing is evaluated in this study. The use of a small amount of ammonium chloride in a combined print–finish process induces significant pigment print paste viscosity losses. However, the catalyst 2-aminoethanesulphonic acid produces negligible viscosity reduction when used in the combined print–finish process, coupled with the desired levels of finish and pigment print performance. Similar dry crease recovery, breaking load, colour strength and colour fastness properties are achieved by using 2-aminoethanesulphonic acid in the combined print–finish process relative to the conventional print–finish process.     

氯碱下游产品清洁生产工艺进展(待续)

介绍了环氧丙烷、环氧氯丙烷、钛白粉、硝基氯苯、氯乙酸、氯化亚砜、氯化苄、氯乙酰氯、三氯氧磷、ADC发泡剂、间苯二酚的清洁生产工艺进展情况.     

氯碱下游产品清洁生产工艺进展(续1)

介绍了环氧丙烷、环氧氯丙烷、钛白粉、硝基氯苯、氯乙酸、氯化亚砜、氯化苄、氯乙酰氯、三氯氧磷、ADC发泡剂、间苯二酚的清洁生产工艺进展情况。     

氯碱下游产品清洁生产工艺进展(续完)

介绍了环氧丙烷、环氧氯丙烷、钛白粉、硝基氯苯、氯乙酸、氯化亚砜、氯化苄、氯乙酰氯、三氯氧磷、ADC发泡剂、间苯二酚的清洁生产工艺进展情况。     

C.I.颜料红48:2表面改性的研究

2B酸重氮化与2,3酸偶合,30分钟后,填加阴离子表面活性剂,用氯化钙进行色淀化得标题颜料。分散剂MF、扩散剂NNO、聚丙烯酸、红油使颜料的鲜艳度、着色力和透明度提高,色光有所变化;MF、NNO和聚丙烯酸使颜料的流动性提高;红油、十二烷基磺酸钠使流动性下降;阴离子表面活性剂可提高颜料在二甲苯中的分散性。     

盐酸法粗磷酸中氯化钙的去除研究现状

磷酸是一种重要的化工原料,其用途十分广泛。使用传统硫酸法会产生大量磷石膏,磷石膏在利用方面缺乏较为完整成熟的技术,磷石膏利用率较低,容易造成环境污染,给企业带来成本压力。并且硫酸法对磷矿品位有一定要求,相比之下盐酸法具有其独特优势。盐酸法粗磷酸中主要成分是磷酸和氯化钙,氯化钙的去除技术和综合利用是影响盐酸法大规模工业应用的关键所在。介绍了萃取法、三聚氰胺法、离子交换法、液膜法去除氯化钙技术以及氯化钙废液的综合利用现状,针对盐酸法工艺存在的问题提出了建议。指出经济、高效地去除盐酸法粗磷酸中的氯化钙以及对其有效利用是盐酸法湿法磷酸工艺推广应用的关键。