用湿式双氧水氧化法处理丁苯橡胶生产废水

采用湿式双氧水氧化法对丁苯橡胶生产废水进行处理,考察了反应温度、反应时间、双氧水用量及体系pH值等对废水中化学需氧量去除效果的影响,并与Fenton法进行了处理效果的对比。结果表明,采用湿式双氧水氧化法时,在常压、双氧水用量4 mL/L且一次性加入、反应温度95℃、搅拌转速600 r/min、反应时间60 min、体系pH值为原水的6~7(不调)的条件下,丁苯橡胶生产废水中化学需氧量的去除率达67%以上,是Fenton法达到同样处理效果时双氧水用量的1/2,且无二次污染。     

Fenton试剂-混凝沉降法处理丁苯橡胶生产废水中试

采用Fenton试剂-混凝沉降法,对某石化公司的丁苯橡胶废水进行了为期3个月的中试处理研究。结果表明,在进水的化学需氧量(COD)为600~1 100 mg/L、生化需氧量(BOD5)为140~250 mg/L、悬浮物(SS)为0~400 mg/L、pH值为4~11的情况下,经过Fenton试剂-混凝沉降法处理,系统出水COD小于350 mg/L,BOD5小于150 mg/L,SS小于50 mg/L、pH值为6~9,出水水质满足GB 8978—1996三级标准的排放要求,出水的BOD5/COD值由0.15~0.28提高至0.33~0.45,可生化性大幅提高。     

用甲酸-过氧化氢法制备环氧化丁苯橡胶

以聚乙二醇为相转移催化剂,采用甲酸-过氧化氢法制备了环氧化丁苯橡胶(SBR),研究了聚乙二醇/SBR(质量比)、甲酸/SBR(质量比)、过氧化氢/甲酸(摩尔比)、SBR质量浓度、反应温度、反应时间的影响,并用红外光谱法及核磁共振法对其结构进行了表征。结果指出,相转移催化剂聚乙二醇可提高SBR的环氧化程度。最佳环氧化反应条件为:聚乙二醇/SBR0·05,甲酸/SBR0·15,过氧化氢/甲酸1·0~1·2,SBR质量浓度0·11g/mL,反应温度70℃,反应时间4h。     

硫酸亚铁-过氧化氢体系绿色合成聚苯胺的研究

以硫酸亚铁-过氧化氢为绿色催化氧化体系合成了聚苯胺。探讨了硫酸亚铁浓度、过氧化氢的用量、反应体系酸度、反应温度、苯胺浓度等工艺条件对聚苯胺收率的影响,分析了该体系中苯胺可能的聚合机理,推测并初步验证了反应液重复使用的可行性。在亚铁浓度为3.36×10-4mol/L,n(过氧化氢)∶n(苯胺)=1.4∶1.0,反应温度为70℃,H+(硫酸)浓度1.5 mol/L,单体浓度0.9 mol/L条件下,聚苯胺收率为77.2%。     

过氧化氢湿式催化氧化技术处理高浓度染料废水的研究

本文以过氧化氢(H2O2)为氧化剂,在常温常压下,对高浓度染料废水用湿式催化过氧化氢氧化法(CatalyticWetHy-drogenPeroxideOxidation简称CWPO)处理,可达到比较满意的结果。通过实验室的小试规模确定了各种湿式催化氧化的条件,通过不同催化剂处理效果的比较表明,四元组合MnO2-CuO-CeO2-Fe2O3(摩尔比2:4:2:1)催化剂性能较好,当反应在常温常压下,维持pH在弱酸性的范围,反应时间为40～60min,COD的去除率大于80%,色度去除率大于90%,达到了比较满意的处理效果。     

间过氧化氢二异丙苯在丁苯橡胶装置上的应用

以间过氧化氢二异丙苯（ｍ－ＤＩＰ）替代对过氢二惜内苯（ｐ－ＤＩＰ）作引发体系的经剂,进行了下苯橡胶的小试和生产装置试验。结果表明,所生产出的低温乳聚丁苯橡胶性能符合ＧＢ１２８２４－９１要求;与ｐ－ＤＩＰ相比,使用ｍ－ＤＩＰ可进一步提高后期聚合反应速率,从而降低氧化还原体系用量和ＤＩＰ单托。     

过氧化氢蒎烷对丁苯橡胶聚合的影响

研究了过氧化氢蒎烷（PHP）对丁苯橡胶聚合的影响,与过氧化氢二异丙苯（DIP）引发聚合的对比结果表明,PHP的催化活性要比DIP的高,同样纯度的引发剂,PHP质量分数的DIP的54％时二者具有相同的引发效果。而且对所制备胶乳性能的影响相近。用PHP制得的SBR1502橡胶的相对分子质量分布和物理机械性能与用DIP制备的接近,PHP与DIP混合引发剂不影响聚合速率。     

丁苯橡胶工业废水处理工程实例

丁苯橡胶生产废水含有大量环状有机物和低聚物,可生化性差,采用隔油-气浮-水解酸化-部分氧化联合工艺处理,可有效提高废水的可生化性。工程运行结果表明,丁苯橡胶生产废水经本联合工艺处理后主要出水指标可达到GB 8978—1996《污水综合排放标准》三级标准的要求。     

用Fenton试剂处理丁苯橡胶废水

用Fenton试剂处理丁苯橡胶废水,考察了H2O2和FeSO4的用量、初始pH值、反应时间以及反应温度对废水化学需氧量(COD)去除率的影响。结果表明,适宜的处理条件为H2O2(以1 L废水计)8 mL、FeSO4质量浓度1.0 g/L、初始pH值3～10、反应时间30 min、反应温度40℃,在此条件下废水COD的去除率可超过55%。     

催化氧化-絮凝法处理蒽醌法生产过氧化氢的化工废水

以处理青海某化工厂采用蒽醌法生产过氧化氢产生的废水为实例,介绍催化氧化-絮凝法处理生产过氧化氢工艺所产生的废水的工艺设计参数、工艺流程及处理效果。运行结果表明,催化氧化-絮凝法处理过氧化氢废水具有较好的处理效果,对各污染因子都有较高的去除率,COD去除率高达92.6%,各项指标均达到了污水综合排放标准(GB 8978-1996)一级排放标准。该工艺利用废水中的过氧化氢处理废水,达到了以废治废的效果,不产生二次污染,具有较好的经济效益,同时兼有设备投资低、处理效果好、流程简单、操作管理方便等优点。     

丁苯橡胶生产及市场分析

综述了国内外丁苯橡胶（SBR）的生产及市场情况,对国内SBR的市场发展趋势进行了分析。并预测在世界金融危机的影响下,国内SBR需求增长将会放缓,而国内产能的猛增,将加剧SBR产能过剩,造成供过于求的局面。此外,本文还对国内SBR行业存在的不足提出了几点建议。     

丁苯橡胶生产及市场分析

综述了国内外丁苯橡胶的生产及市场情况,对国内丁苯橡胶的市场发展趋势进行了分析。此外,还对国内丁苯橡胶行业存在的不足提出了几点建议。     

Degradation of halogenated organic compounds in ground water by heterogeneous catalytic oxidation with hydrogen peroxide

summary Catalytic oxidation with hydrogen peroxide is a reliable method for the treatment of polluted water. The conversion of a wide spectrum of components including aliphatic and aromatic hydrocarbons as well as halogenated organic compounds into non-toxic or minor-toxic substances and finally into carbon dioxide and water can be achieved. The degradation of chlorobenzene, 4-chlorophenol, 4-chloroaniline and 1-nitro-4-chlorobenzene was investigated. Several catalysts can be implemented into the catalytic process. It has been demonstrated that the type of catalyst and oxidation agent as well as the reaction parameters influence the degradation rate and has to be adjusted to the concrete waste water problem to be solved.     

Novel green composites from styrene butadiene rubber and palm oil derivatives for high performance tires

In rubber compounding, renewable, nontoxic, and degradable palm oil is used as a safe alternative softener or stabilizer process oil. In the tire industry, with the development of environment-friendly “green tires,” silica has been used as a reinforcing filler for tread compounds. To make the hydrophilic silica compatible with the hydrophobic rubber matrix, the addition of amphiphilic oil is required. We, for the first time, prepared an amphiphilic palm oil derivative (PO) with hydrophobic and hydrophilic functional groups in bulk. Rubber composites prepared with the PO exhibited remarkable improvements in mechanical properties, including tensile strength, elongation, and fatigue. These improvements are attributed to the enhanced dispersion of the fillers in the rubber matrix due to the PO. Also, the mixing of PO in the rubber matrix resulted in outstanding abrasion, rebound resilience, and heat buildup properties at low loadings. We then prepared pneumatic tires with a tread composite using PO, and conducted virtual tests using a vehicle-mounted pneumatic tire. The pneumatic tire exhibited enhanced high speed durability, dry and wet braking. The strong interfacial interactions between the silica and the rubber matrix due to the PO resulted in improved viscoelastic properties. These results show that PO is a renewable potential replacement for conventional aromatic oils in tire engineering applications. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136, 47672.     

SMC晶须在丁苯橡胶中的应用

对硅镁钙晶须（SMC晶须）在丁苯橡胶（SBR）中的应用进行了研究,考察了晶须用量（0～50phr）对胶料的硫化特性和硫化胶的力学性能的影响,并与常用的填料白炭黑（WCB）和碳酸钙（CaCO3）进行了比较。实验结果表明：SMC晶须对SBR有促进硫化作用;SMC晶须对SBR具有一定的补强作用,拉伸强度随着晶须用量的增加而增大;用量相同时,SMC晶须填充的复合材料硬度和撕裂强度与WCB填充的相当,300%定伸应力比WCB填充的高,拉伸永久变形比WCB小得多;SMC晶须补强效果远优于CaCO3。     

掺烧废硫酸亚铁制硫酸技术经济的讨论

硫酸法钛白配有废酸浓缩工序,废酸浓缩产生的废硫酸亚铁,绝大部分企业采用石灰中和处理,既造成资源浪费,又增加处理费用。介绍了采用掺烧新途径能使废硫酸亚铁中硫铁资源得到充分利用,并且取得显著的经济效益,以10万t/a钛白匹配30万t/a硫酸为例,年节省硫铁矿4.69万t,创产值2 292万元。     

双氧水生产中的“三废”处理

探讨了蒽醌法双氧水生产过程中产生的废气、废水、废渣的处理方法。利用膨胀制冷联合炭纤维吸附技术对氧化尾气进行处理,同时也降低了芳烃的消耗;利用双氧水催化氧化-絮凝法对废水进行处理,处理后的水作为循环水系统的补充水,实现废水的再利用。     

Sequential interpenetrating polymer network based on styrene butadiene rubber and polyalkyl methacrylates

A series of sequential interpenetrating polymer network (IPNs) based on styrene butadiene rubber (SBR) and polyalkyl (methyl, ethyl, and butyl) methacrylates have been prepared by using tetraethylene glycol dimethacrylate as crosslinker. The IPNs were characterized by infrared spectrophotometer, dynamic mechanical analyzer, thermogravimetric analyzer, and swelling study. IPNs have exhibited higher tensile properties compared with pure SBR. IPNs based on PMMA have shown higher tensile strength compared with others. Dynamic mechanical analysis has shown that the IPNs have superior dynamic properties than SBR. Because of IPN formation, tan δ peak shifted inward between SBR and acrylates. Although the magnitude of tan δ decreased, the peaks were broadened because of micro heterogeneous phase separation. At higher concentration of methacrylate, splitting in tan δ peak was noticed because of phase separation. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 103: 1120–1126, 2007     

提高聚合温度增产的研究

研究了乳液聚合丁苯橡胶(ESBR)合成工艺中不同聚合反应温度及引发剂用量对聚合反应速率的影响.实验结果表明,在聚合反应温度提高至8℃,控制聚合反应速率基本不变的条件下,可降低10%引发剂用量,减少制冷量,而橡胶的凝胶含量及分子量分布正常,产品物性达到优级品指标.