我国西部地区主要非金属矿产资源

省 (区 )探明矿种数 储量丰富矿种备　　注四川(含重庆 ) 30水泥用石灰岩及配料 ,饰面石材 ,石膏 ,白云岩 ,晶质石墨 ,重晶石 ,耐火粘土 ,石榴石 ,硅藻土 ,铸石原料 ,石棉贵州 2 7水泥原料 ,玻璃原料 ,砖瓦粘土 ,饰面石材地质工作程度相对较低。云南 52石灰岩 ,玻璃用砂 ,大理石 ,石膏 ,硅藻土 ,硅灰石 ,宝玉石陕西 53 玻璃石英砂 ,重晶石 ,萤石 ,滑石 ,熔剂岩甘肃 2 6石棉 ,红柱石 ,铸型粘土 ,饰面蛇纹岩 ,石灰岩 ,白云岩 ,硅石 ,水泥用黄土等青海 56石棉 ,石英岩 ,石灰岩 ,粘土类 ,玄武岩 ,白云岩 ,石膏 ,硅灰石 ,长石 ,天然碱等地质工作…     

国内商情

今年化工市场趋势预测 畅销品种硫酸,盐酸,液氯,钛白粉,硫酸铜,纯苯,甲苯,二甲苯,萘,氯化苯,邻硝基氯苯,甲醇,乙醇,丁醇,辛醇,新戊二醇,季戊四醇,甘油,冰醋酸,己二酸对苯二甲酸,间苯二甲酸,偏苯三酸酐,醋酐,顺酐,苯酐,苯酚,壬基酚,对甲酚,间甲酚,间对甲酚,苯胺,己内酰胺,尼龙66盐,丙烯酸酯类,聚乙烯醇,聚氯乙烯,聚乙烯,聚     

机立窑安全操作三字经(连载九)——异常窑况 垮边、掉洞、抽心操作

机立窑,运行中,在局部,有漏空;塌在边,叫垮边;塌二肋,称掉洞;中塌陷,叫抽心。怎操作,i己,心中:性相近,操作同;先停却,观窑中,视情节,分轻重;轻塌者,用中风,先返火,窑面红,撬大块,补洞洞,撒点煤,用小风,必要时,钎引风,数十分,即成功。严重者,情不同,多数时,结窑重,停加却,用中风,全窑料,都烧红,打结圈,填洞洞,若遇见,最严重,填熟料,或砖头,后红块,再木柴,加点煤,‘J、风焙;余操作,似火偏,挤压插,记心间;压快口,提弱边,渐加风,把煤减,勤慢却,不粘边,撬快口,补弱边,多瓜次,底火全,转正常,处理完。机立窑安全操作三字经(连载九)——异常窑况 垮…     

商品价格

上海近期化工原料市场价格硫酸375,纯碱1050,固碱2420,黄磷6500,浓硝酸1700,硝钠1300,亚硝钠2000,氧化锌8000,钛白粉(金红石型)14000,液氨1350。烟煤204,无烟煤176,重油760,柴油(0~#)1720,汽油(70~#)3350、(90~#)3500,石蜡(58℃)3800,溶剂油1800,纯苯2300,甲苯2850,二甲苯2800,萘4200,甲醇1400,乙醇2800,丁醇4800,辛醇5100,乙二醇3500,甘油(96%)9500,苯酐5100,冰醋酸3700,硬脂酸8000,丙烯酸甲酯8500,DOP6600,DBP6650,甲醛1000,丙酮3600,苯酚5400,     

有机电解合成参考书目

西文 1 Eberson, Schafer, Organic Electrochemistry, Springer, 1971 2 Fry, Synthetic Organic Electrochemistry, Harper, 1972 3 Rifi, Covitz, Introduction to Organic Electrochemistry, Marcel Dekker, 1974 4 Kyriacon, Basics of Electroorganic Synthesis, John Wiley ＆ Sons, 1981 5 Mann, Banles, Electrochemical Reactions in Nonaqueous Systems, Marcel Dekker, 1970 6 Furmkin, Ershler, Frogress in Electrochemistry of Organic Compounds, Plenum, 1971 7 Tomilov et al., Electrochemistry of Organic Compounds, Halsted, 1972     

国内商情

无机化工 1.畅销品种 硫酸,盐酸,氢氟酸,磷酸,亚磷酸,铬酐,电解锌,硫铁矿,结晶硅,金属锰,炭黑,液氯,黄磷,赤磷,氧气,氮气,双氧水,活性氧化锌,钛白粉,气相白炭黑,液体二氧化硫,氧化镁,液     

电感耦合等离子体发射光谱法和电感耦合等离子体质谱法测定天然绿色棉和染色绿色棉中20种元素含量

采用微波消解对天然绿色棉和染色绿色棉样品进行处理,通过电感耦合等离子体发射光谱法(ICP-OES)和电感耦合等离子体质谱法(ICP-MS)测定其B,Na,Mg,Al,P,K,Ca,Ti,V,Mn,Fe,Co,Ni,Cu,Zn,Ga,Rb,Sr,Mo,Ba 20种元素的含量。结果表明,与染色绿色棉相比,天然绿色棉中B,Mg,P,K,Ti,Mn,Rb,Sr,Mo元素含量显著偏高(概率P0.05),Na,Zn,Ba元素含量显著偏低(P0.05),采用聚类分析(最短距离法)对样品中20种元素含量进行处理,可正确判断天然绿色棉和染色绿色棉。     

《化工学报》2014年第一作者单位刊出论文统计

<正>发表1篇文章的单位有:The Ohio State University,安徽农业大学,北京低碳清洁能源研究所,北京航空航天大学,北京林业大学,北京市环境保护科学研究院,北卡莱罗纳州立大学,渤海大学,重庆科技学院,大连交通大学,福州大学,广东工业大学,广东轻工职业技术学院,广西民族大学,广州大学,桂林理工大学,国家海洋局第三海洋研究所,哈尔滨商业大学,哈尔滨师范大学,河北大学,河海大学,河南大学,河南科技大学,河南师范大学,湖南科技大学,华北水利水电大学,华东交通大学,华侨大学,淮阴工学院,淮阴师范学院,吉林大学,嘉兴学院,江苏第二师范学院,解放军理工大学,兰州交通大学,廊坊师范学院,丽水学院,辽宁工业大学,辽宁石油化工大学,南昌航空大学,南华大学,南京大学,     

腐植酸改碱肥料在西部绿化开发中的应用

生态环境革命是二十一世纪世界发展的主题,而绿色是生态环境的中心,盐碱土绿化是世界难题,多年来国内外学者一直探讨改良的捷径,据统计,我国有5．2亿亩盐碱地,分布在23个省,市,自治区,北方多为微碱性,碱性土壤,盐碱程度重的100多个城市,东北,华北地区的大庆,德州及天津,黄骅,东营等市,西部地区包括银川,内,蒙,宁夏,甘肃,陕西,青海,西藏有盐碱地2．12亿亩,盐碱是制约西部园林绿化的难点,山东省德州市盐碱土绿化研究所,历时十年的艰辛探索,研究出新型腐植酸改碱肥料。“园艺盐碱土改良肥”,1994年通过省级鉴定,1997年获山东省科技进步三等奖,目前已在全国十余省包括天津,银川,大庆,盐城,兰州等地推广应用。     

从醋酸生产乙醇的过程

正在第一金属,硅酸盐载体和至少一种载体改性剂存在下醋酸加氢反应选择性生产乙醇的过程。优先地,第一金属从由铜,铁,钴,镍,钌,铑,钯,锇,铱,铂,钛,锌,铬,铼,钼和钨组成的基团中选择。另外,催化剂可能包含第二金属,优先从由铜,钼,锡,铬,铁,钴,钒,钨,钯,铂,镧,铯,锰,钌,铼,金和镍组成的基团中选择。     

EFFECTS OF DRYING, TEMPERING AND AMBIENT AIR VENTILATION ON QUALITY AND MOISTURE REDUCTION OF CORN

The objective of this work is to study systematically how to decrease corn moisture content using processes consisting of fluidized bed drying, tempering and ambient air ventilation. Effects of drying, tempering and ventilation on moisture reduction and quality of dried corn in terms of stress crack, breakage and color are experimentally investigated. Experimental results show that stress crack depends on final moisture content of com. Tempering is found useful for increasing the quality of dried com after fluidized bed drying. The optimum tempering time is 40 minutes. Among the ambient air velocity ranging from 0.075 to 0.375 m/s, the appropriate velocity is 0.15 m/s. Final moisture content of com after ambient air ventilation is about 13.0 - 14.5 %(w.b.) with breakage and stress crack lower than 2% and 5% by wt., respectively. Slight change of color of dried corn is observed.     

Spray Drying of Green Corn Pulp

Maize (Zea mays) is a cereal grown in Brazil, and its availability is limited to the harvest season. An alternative processing route is based on the production of green corn powder, which has a longer shelf-life and increased versatility. This study aimed to evaluate the influence of drying conditions on the physical characteristics, size, and morphology of green corn powder. Drying experiments were performed on a spray dryer according to a central composite rotational design to evaluate inlet air temperature, feed flow rate, and pulp concentration. The yield of dried pulp corn had an average value of 36.19%. The following mean values for the physical properties of the powder were measured: solubility of 94.37 g/100 g, wettability of 128.05 seconds, moisture content of 1.97%, water activity of 0.13, density of 0.79 g/mL, and a particle diameter of 31.02 µm. The powder was also yellow with less intensity, and the particle surface was smooth at higher temperatures and had a tendency to form agglomerates. The estimated optimal conditions for spray drying were 48% (w/w) pulp concentration, 172°C inlet air temperature, and feed flow rate of 0.56 L/h.     

Encapsulation of yeast (Saccharomyces cereviciae) by spray drying for extension of shelf life

The objective of the present work was to encapsulate yeast using different carrier materials and examine their efficacy in retaining viability of cells after spray drying. Slurry containing yeast cells along with known amount of carrier material (maltodextrin, corn starch, gum arabic, acacia gum, polyethylene glycol 8000, β-cyclodextrin, and skimmed milk powder, one at a time) was added and served as feed. Among these carrier materials attempted, corn starch and maltodextrin showed the best results with respect to powder yield (59%, w/w) and cell survival (80.5%), respectively. However, considering both survival and powder yield (67 and 59% w/w, respectively), corn starch was observed to be the most suitable carrier material.     

42%烟嘧·莠·异丙可分散油悬浮剂防除玉米田杂草试验

为了明确42%烟嘧·莠·异丙可分散油悬浮剂对玉米田杂草的防除效果及对玉米安全性,进行了田间小区试验。结果表明:42%烟嘧·莠·异丙可分散油悬浮剂对玉米田一年生杂草有良好的防除效果。适宜施药时期为玉米3⁵叶,适宜用药量为26255叶,适宜用药量为2625³000 mL/hm2。在上述推荐剂量范围内,对玉米安全。     

Determination of dielectric properties of corn seeds from 1 to 100 MHz

The dielectric properties of corn seeds were determined in the ranges of 9.71-21.51% wet basis (w.b.) for moisture content, 772.5-902.2 kg/m³ for bulk density and 1-100 MHz for frequency of applied electric field using a coaxial capacitor sample holder. Effects of the parameters such as moisture content, bulk density and frequency on the dielectric properties were investigated. The dielectric constant, loss factor and loss tangent were greatly affected by the moisture content, frequency and bulk density. The moisture content was the most significant factor affecting the dielectric properties of corn seeds. The dielectric constant, loss factor and loss tangent increased with increasing moisture content and bulk density. The second and third-order polynomial equations were proposed to describe the existing relationship between dielectric properties and moisture content. Dielectric measurements provided new information concerning moisture content and bulk density dependent behaviour of dielectric properties of corn seeds that may be useful in sensing of the moisture content.     

康平县盐碱耕地化学改良技术的研究

以磷石膏等作为改良剂,改良康平县盐碱地土壤,并开展小麦、玉米大田试验研究。改良后在无灌溉并疏于管理条件下小麦667 m~2产量为270 kg,玉米667 m~2增产50%,土壤中w(盐)下降90%,pH下降18.2%。研究结果表明,改良剂能改善土壤结构,选用稻壳做隔离层能减少土壤水分蒸发从而抑制盐分的表聚,降低耕作层盐分含量,增加土壤通透性,反盐现象得到制止。拟在大面积耕地中,努力开拓盐碱地开发利用新途径,积极推进盐碱地资源的生态利用与产业化的开发。     

交联玉米淀粉-醋酸乙烯酯接枝共聚乳液的制备及性能

碱性条件下,玉米淀粉经环氧氯丙烷交联处理后,在引发剂存在下,与醋酸乙烯酯进一步接枝共聚制得了交联玉米淀粉-醋酸乙烯酯乳液,经红外光谱确认了共聚物,较好的乳液制备工艺:m(淀粉)∶m(环氧氯丙烷)=25∶1,90°C交联1 h,加入过硫酸铵,按m(醋酸乙烯酯)∶m(淀粉)=3∶1,在70°C接枝共聚3 h。各种淀粉胶液的性能对比结果表明:交联玉米淀粉-醋酸乙烯酯接枝聚合乳液冷热稳定性好,耐水性≥54 h,储存期360 d,剪切强度达9.1 MPa。     

A RAPID CONVECTION OVEN DRYING TECHNIQUE FOR MOISTURE CONTENT DETEFMINATION I N CORN AND SOYBEANS

A convection wen drying technique was used to develop a modified method for moisture content determination in corn and soybeans. Samples of corn and soybeans in the moisture ranges of 10–27% w.b. and 9–23% w.b.. respectively. were exposed to different temperatures for varying periods of time in a forced air convection wen. A correlation was developed beheen the reference moisture content of the samples of corn and soybeans and the moisrure content after a drying time of one hour. The predicted results were in close agreement with the standard air oven test results in the range of moisture contents studied.     

A RAPID CONVECTION OVEN DRYING TECHNIQUE FOR MOISTURE CONTENT DETEFMINATION I N CORN AND SOYBEANS

A convection wen drying technique was used to develop a modified method for moisture content determination in corn and soybeans. Samples of corn and soybeans in the moisture ranges of 10-27% w.b. and 9-23% w.b.. respectively. were exposed to different temperatures for varying periods of time in a forced air convection wen. A correlation was developed beheen the reference moisture content of the samples of corn and soybeans and the moisrure content after a drying time of one hour. The predicted results were in close agreement with the standard air oven test results in the range of moisture contents studied.     

多层过滤器反冲洗过程试验研究

深层过滤过程是水处理工程中的基本单元方法，在油田注水处理、石化厂废水治理方面有很重要的地位。反冲洗过程是深层过滤的最后环节，其目的是命名过滤器能够反复使用，降低工业生产成本。经试验研究，对于多层过滤器，本文所特有的反冲洗方法（气水反冲洗）具有能耗低、耗时少、冲洗效果好等优点， 在工业生产中有着良好的应用。