温度、酸度对大曲酒产、质量的影响

本文从温度、酸度对大曲酒产、质量的影响，揭示大曲酒夏季＂掉排＂的主要原因为高温、高酸环境抑制了酿酒酵母的发酵，降低了酿酒酵母的发酵力，从而影响了大曲酒的产、质量。     

Increasing Raffinate Dewaxing Efficiency

The efficiency of dewaxing of wide and narrow distillation raffinates using different mixed solvents: acetone and methyl–tert–butyl ether (MTBE), acetone and toluene, methyl ethyl ketone (MEK) and toluene, is compared. Decreasing the cutpoints from 100–140 to 50–70°C increases the filtration rate by 2 and more times and the yield of dewaxed lube oil by 2.5–5% as a function of the solvent used.     

抽余C_4烃中异丁烯催化逆流水合制叔丁醇

采用大颗粒离子交换树脂催化剂,在φ100mm×10m的反应器中进行了异丁烯催化逆流水合制叔丁醇的中间试验。考察了反应温度、水油体积比和抽余C4烃的流速等对异丁烯转化率的影响。试验结果表明,异丁烯催化逆流水合制叔丁醇的适宜操作条件为:反应温度80~90℃,水油体积比为4~5,抽余C4烃的流速为0.45~0.55mm/s。在此条件下,异丁烯的转化率可达88.8%。工业装置运转结果表明,异丁烯转化率大于75%。     

甲基葡萄糖甙（MeG）水溶液工艺改进试验

介绍了用５次以上的母液生产ＭｅＧ水溶液工艺的改进试验。     

利用抽余C5加氢制戊烷

抽余C5目前主要用作燃料，用催化加氢方法可将其制成戊烷。多种金属催化剂对抽余C5有加氢活性,其中Pd-La-Ce/Al2O3在低压下表现出优良的反应活性。工艺条件试验表明:温度、H2/油比(V)对反应的影响较大。在选定的反应条件下(温度130-145℃;H2/油比(V)400;反应压力0.25MPa;液空速0.3h-1),催化剂Pd-La-Ce/Al2O3的500小时稳定性考察表明,该催化剂具有较优的反应活性、选择性和稳定性,通过一次加氢反应即可将烯烃含量达90%以上的抽余C5转化为饱和烃含量大于98%的戊烷产品     

邻氯氯苄残液回收利用的工艺研究

回收利用工业生产邻氯氯苄排出的残液，经氯化、水解、精馏制取一种广泛用于农药、医药、染料等的精细化工产品邻氯苯甲醛，考察了温度、反应时间、催化剂等因素对反应的影响，确定了反应的优化条件，两步反应总收率为48．0％，产品主含量≥97．1％。     

Corrosion and mechanical behavior of fusion bonded epoxy (FBE) in aqueous media

In recent years there have been many reported cases of corrosion failure in cement concrete pipelines. In the majority of cases, the failures have been attributed to rebar corrosion which is caused by the permeability of chloride from low resistivity soil and subsequent attack on a passive layer on an iron bar in the structure. As a possible alternative to cementitious materials, some organic coatings based on olefin, vinyl or epoxy-based polymers have been considered. However, due to a paucity of data on the behavior of these coatings in aqueous media— particularly product water—the possibility of their application in water transmission systems in the Kingdom has not been fully exploited. This paper deals with the studies carried out on the corrosion and mechanical behavior of fusion bonded epoxy (FBE) coating on steel in aqueous media which include product water, distilled water and saline water. The mechanical testings on coating include adhesion, bending and cathodic disbondment testings. The corrosion studies include immersion testing under static and dynamic conditions, autoclave tests and accelerated (salt-fog) tests. The analysis of results indicates chemical inertness of FBE coating in either of the aforementioned water used during testing, good adhesion and no damage to the coating during bending. Cathodic disbondment tests indicate that FBE coating sustains under cathodic protection (CP) conditions. In general, the results of mechanical and corrosion tests indicate that FBE is a promising material for internal coating on steel in water transmission systems.     

多效蒸馏水机控制过程数学模型的建立与分析

蒸馏水机的数学模型较为复杂，其热交换回路中主蒸汽压力、温度与原料水的压力、流量耦和紧密，且呈非线性关系，并含有不确定项，许多经典的控制算法无法使用。根据化工热交换原理，由双效蒸发器的数学模型进行线性化处理，得到一个五阶数学模型，进而推导出六效蒸发器的数学模型。在改进蒸发器的基础上，采用了一种基于精确数学模型的模糊PID自整定控制算法，经仿真研究验证是解决上述问题的较佳方案。     

萃余酸净化制三聚磷酸钠研究

为利用湿法磷酸萃取净化过程产生的副产物萃余酸,对萃余酸净化制三聚磷酸钠进行了探索。实验研究了分步中和净化方法,通过控制反应pH,可以除掉磷酸中绝大部分有害杂质。为提高湿法磷酸中和过程的除杂效果,还尝试在中和过程中加入氨水、氯化铵、草酸铵、氟化铵、氟化钠几种沉淀促进剂。初步实验结果表明,氨水和氟化钠对沉淀析出有显著效果,为最佳沉淀促进剂。     

面向21世纪的分子蒸馏单甘酯工业

通过对国内外分子蒸馏单甘酯工业的技术发展,生产和应用状况的简述,分析了下一个世纪我国单甘酯工业的市场前景和面临的挑战,提出了我国单甘酯工业在发展中应注意解决的问题。