减压蒸馏

The experimental results showed that using ionic liquid Et3NHCl-2AlCl3 under the conditions of an extraction temperature of 40℃, an extraction time of 40 min and an agent/oil ratio of 0.02, the sulfur removal rate was more than 90%. The ionic liquids could be used repeatedly for 4 times and the used ionic liquids could be regenerated by vacuum distillation, about 52.34% of the thiophen was recovered during regeneration.

实验结果表明，选用无水AlCl3与Et3NHCl的摩尔比为2.0的离子液体进行萃取脱硫实验，当萃取时间为40 min、温度为40 ℃、剂油体积比为0.02时，脱硫率可达到90%以上；离子液体不仅可以重复使用4次，而且还可以通过减压蒸馏的方法进行再生，在再生过程中可回收约52.34%的噻吩。

The watermelons, the citrullus lamtus or the stems and leaves thereof are taken as raw materials, and the extracting process comprises the following steps: firstly, the raw materials are washed clean and broken to separate the watermelon peel from the watermelon pulp for respectively extracting juice; the two juices are mixed, and micro-filtration and ultra-filtration are carried out to remove insoluble substances and macromolecular substances; and then reverse osmosis and nano-filtration are carried out to obtain the filtrate; the pH value of the filtrate is regulated and then a macroporous strong acid cation exchange resin column is added; and then ammonia water is taken as an eluant for isocratic elution; the eluent obtained is decompressed, distilled, deaminized, discolored, condensed and crystallized to obtain a white crystalline product of the natural L-citrulline extracted from the watermelons.

本发明方法以西瓜、打瓜或者其茎叶为原料，其过程为：首先将原料清洗干净，破碎后将西瓜皮西瓜瓤分开，分别进行榨汁；所得汁液合并，经过微滤和超滤除去不容物和大分子物质；然后再经反渗透和纳滤过滤；透过液调节pH值后通入大孔型强酸性阳离子交换树脂柱；然后以氨水做洗脱剂进行等度洗脱；将洗脱液减压蒸馏脱氨，脱色，浓缩结晶，得到西瓜提取天然L-瓜氨酸白色结晶产品。

Synthesis of dibutyrate nylon acids from nylon acids and butanol by the reaction of direct esterification and distillation under reduced pressure, using solid acid as catalyst.

尼龙酸在固体酸催化下，与丁醇直接酯化、减压蒸馏制得合格的尼龙酸二丁酯。

The optimum process starting from 1,3-dihydroxyacetone and formamidine acetate was: 22.54g(0.25mol) 1,3-dihydroxyacetone, 29.12g(0.28mol) formamidine acetate and 120ml isopropanol in liquid ammonia was heated to 40℃ for 8h.

以1，3-二羟基丙酮和醋酸甲脒为原料的较佳工艺：1，3-二羟基丙酮22.54g (0.25mol)，醋酸甲脒29.12g (0.28mol)，异丙醇120ml，通入液氨，40℃反应8h，减压蒸馏除去反应液中的氨气后过滤，滤液加至热的苦味酸饱和溶液，自然冷却至室温，制得4(5)-羟甲基咪唑苦味酸盐69.5g，收率85.0%。

The difficulty of route is the refinement of products. There is a lot of sodium chloride in solution. In order to refine the glycolic acid, the methods of vacuum distillation and organic solvent extraction are adopted.

水解合成后得到的是羟基乙酸的水溶液，其中含有大量的氯化钠和少量未水解的氯乙酸及其它杂质，采用减压蒸馏及有机溶剂萃取方法进行精制是比较适宜。

Juglone product was obtained from bark of J. mandshurica by ultrasonic extraction and vacuum distillation, and the yield of product was 0.09%. The product was characterized by FT-IR, GC-MS and 1H NMR.

研究采用超声波辅助浸提和减压蒸馏等方法，从核桃楸树皮中提取制得胡桃醌产品，产品得率0.09%。

A new method is presented for synthesis of organosilicon compounds directly from precipitated white carbon black by reduced pressure distillation.

该文研究了以沉淀白炭黑为原料，采用减压蒸馏法直接合成六配位体有机硅化合物的新方法。

Syntheses and characterization of transition metal complexes of Schiff base derived from adamantaneamine and salicylaldehyde

收率90%。将光气通入熔融的对硝基苯甲酸，将光气化反应物进行减压蒸馏，也可以获得对硝基苯甲酰氯。

The Semen Gleditsiae of the reactant liquid at the lower layer is removed through adjusting the PH value and then the reactant liquid is decolored through carbon by adjusting the PH value; then the mixture is distilled under decompressed condition to get rid of the water, thus getting 75% crude glycerin.

所得下层反应液通过调节pH值除去皂角，再经调节pH值进行活性炭脱色，减压蒸馏除去水分，得到75％的粗甘油。

In order to improve the content of phosphatidylcholine, a study has been carried out on the use of acetone and alcohol to extract PC from soybean lecithin .

研究了以浓缩大豆磷脂为原料，采用丙酮和乙醇作溶剂，经丙酮脱油、真空干燥、乙醇抽提、减压蒸馏浓缩制备高含量磷脂酰胆碱的提纯工艺。

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。