减压蒸馏

The influence of water content,molar ratio of methanol to oil,concentration of alkaline catalyst,reaction temperature and time different reaction factors to transesterification ,and methods such as water washing,acid washing,extraction and pressure reduced etc.

考察了原料油水分含量、醇油物质的量比、催化剂浓度、反应温度、反应时间等对转酯化反应的影响，以及水洗、酸洗、萃取、减压蒸馏等不同后处理方法对产品品质的影响。

The synthetic process for a new plasticizer used in low temperature, dibutyl nylonic acid ester, was introduced.

介绍了一种新型耐寒增塑剂尼龙酸二正丁酯的合成工艺，用价廉、易得的尼龙酸(由制己二酸母液中获得的C4～C6混合二元酸)及正丁醇为原料，浓硫酸为催化剂，经酯化、脱醇、中和、沉降及减压蒸馏等工序而制得产品。

Underoptimal conditions, in toluene / dimethyl phthalate / TBP, after EAHQ was oxidizedwith 〓, then the catalyst and styrene were added, the conversion of styrene basedon EAHQ is 68%, the selectivity for styrene oxide based on styrene is 92% and theTON of the catalyst is 500; in toluene / phenyl ether / TBP, epoxidation of styrenewas performed with 〓 generated in situ, the conversion is 46%, the selectivity is94% and the product can be separated by distillation under reduced pressure.

优化条件下，甲苯／邻苯二甲酸二甲酯／TBP(2／2／1，体积比)中，EAHQ先用〓氧化完全后，再加入催化剂A和苯乙烯进行环氧化反应苯乙烯相对于EAHQ的转化率为68％，生成环氧苯乙烷的选择性为92％，催化剂A的TON达到500；甲苯／二苯醚／TBP(1／3／1，体积比)中，原位生成〓条件下苯乙烯相对于EAHQ的转化率为46％，生成环氧苯乙烷的选择性为94％，产物可通过减压蒸馏分离。

During extracting vacuum still bottom and hydrocyclone underflow of H-coal process,coal liquid could be clearly divided into deashed liquidproducts of ash yield less than 0.05% and ash-rich residue with ash yield greater than 60%.

在萃取氢-煤法减压蒸馏釜液或水力旋风分离器底流物时，这些重质物料可分离成灰分在0.05%以下的低灰液体产品和灰分达60%以上的富灰残渣。

Wax was produced by two-stage vacuum filtration of acetone-benzol dewaxing unit with the fraction of the second side-cut vacuum distillation as material.

以减压蒸馏二线抽出物为原料，在重油酮苯脱蜡装置的两段过滤工艺中，采取更换冷洗喷头，封堵过滤机底部抽真空过滤面积，调整一段、二段过滤机进料温度分别为-10℃，0℃等措施，进行了58℃石蜡的工业化生产。

High performance rosin esters were produced by esterification reaction of pentaerythritol and toll oil rosin which was purified by reduced pressure distillation .

使用普通塔尔油松香和经过减压蒸馏纯化的精制塔尔油松香为原料，适当加入复合添加剂，通过酯化反应制得优质塔尔油松香改性树脂。

SINOPEC luoyang company has developed the combined process of solvent deasphalting and slurry topping, adopting DOA, the by-product from the unit of solvent deasphalting, and the heavy composition of the products from the unit of reducing press distilling catalytic cracked slurry vacuum distillation, to produce heavy-duty road asphalt with high value-added and high performance by blending.

溶剂脱沥青工艺是一种重要的渣油深加工手段，脱油沥青的合理利用成为溶剂脱沥青工艺发展的关键，洛阳分公司开发出&溶剂脱沥青－油浆拔头&组合工艺，利用溶剂脱沥青装置中的副产品脱油硬沥青和催化裂化油浆减压蒸馏装置的产品中的重组分，运用调合法生产重交道路沥青，可获得高附加值和高性能的沥青产品。

SINOPEC luoyang company has developed the combined process of solvent deasphalting and slurry topping ,adopting DOA,the by-product from the unit of solvent deasphalting,and the heavy composition of the products from the unit of reducing press distilling catalytic cracked slurry vacuum distillation,to produce heavy-duty road asphalt wi.

溶剂脱沥青工艺是一种重要的渣油深加工手段，脱油沥青的合理利用成为溶剂脱沥青工艺发展的关键，洛阳分公司开发出&溶剂脱沥青-油浆拔头&组合工艺，利用溶剂脱沥青装置中的副产品脱油硬沥青和催化裂化油浆减压蒸馏装置的产品中的重组分，运用调合法生产重交道路沥青，可获得高附加值和高性能的沥青产品。

In optimum conditions of the samples obtainedby vacuum distillation, extraction, drying measured response rates of 80%.

在最佳反应条件下制得的样品通过减压蒸馏、萃取、干燥后测得的反应转率在80％以上。

The paper studied the process for extraction of onion oil in vacuum distillation suitable for manufacture.

本文报道了适于工厂化生产的减压蒸馏洋葱油提取工艺。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。