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After analysing the condition of furfural alcohol production, the paper points out that the main

本文分析了当前醇生产的现状,指出液相法加氢工艺是醇生产的主流工艺,铜铬催化剂由于其本身具有良好的性能在醇生产中仍然占有重要地位

At present, furfural is usually produced by one-stage process, which leads to insufficient utilization of raw material and low yield only around 60%.

目前,醛主要采用一步法生产,该法醛收率最高只有 60%,原料得不到充分利用,这是目前制约醛工业发展的主要因素。

A new recovery technology of solid waste was made which is from furfuryl alcohol production by furfural hydrogenization. When the solid waste is placed in a vacuum drying box, and is under lower negative pressure and at 130℃, the organic materials in solid waste can be distilled and then returned to the refining workshop to produce qualified furfuraldehyde and furfuryl alcohol. The remainder is mixed with soda ash and roasted in a reverberating furnace. The sodium chromate can be obtained by leaching. Rough cupric oxide is dissolved in nitric acid and cupric nitrate is obtained. A new catalyst was prepared by the above sodium chromate and cupric nitrate and used in furfuryl alcohol production.

醛液相加氢生产醇产生的废渣置于真空干燥箱中,在较低的负压状态下保持130℃的温度,蒸馏回收废渣中的有机物,返回醇精制车间获得合格的醇与醛产品;剩余的固体废弃物与纯碱混合,在反射炉中焙烧,浸取获得铬酸钠水溶液;最后剩下的粗氧化铜溶于硝酸得到硝酸铜溶液;将铬酸钠溶液、硝酸铜溶液按一定比例混合,加入氨水搅拌,分离出的沉淀经传统方法焙烧活化、造粒制得新催化剂,回用于醛液相加氢生产醇。

Results showed the possibility of re-utilizing SMS as substrates for Pleurotus cornucopiae, Tricholoma lobayense and Pleurotus abalonus with the bio-efficient for about 64.95%、84.65% and 70.49%, respectively, which were similar as it of CK group obtained.

为了解决食用菌产业发展中的菌再利用技术问题,对不同菌的营养成分含量进行分析,对菌替代部分木屑、棉籽壳和麦麸栽培食用菌的效果,以及施用菌有机肥对脐橙产量和品质的影响进行试验。

Catalytic Synthesis of Methyl Furoate by Peroxhydrogen and Sulphate Acid;2. Using hydrochloric acid as a cheap catalyst,perfume methyl furoate was synthesized from methanol and furoic acid prepared from furfural,and was characterized by GC,IR and 1H-NMR.

醛出发,由制备的酸和甲醇反应,在盐酸催化下,合成了香料酸甲酯,并用IR、1HNMR、GC等进行了表征;探讨了包括高纯度酸的制备在内的反应影响因素,在醇酸物质的量之比为 5∶1、催化剂体积占甲醇体积 13。

Using hydrochloric acid as a cheap catalyst,perfume methyl furoate was synthesized from methanol and furoic acid prepared from furfural,and was characterized by GC,IR and 1H-NMR.

醛出发,由制备的酸和甲醇反应,在盐酸催化下,合成了香料酸甲酯,并用IR、1HNMR、GC等进行了表征;探讨了包括高纯度酸的制备在内的反应影响因素,在醇酸物质的量之比为 5∶1、催化剂体积占甲醇体积 13.0 %、反应时间 3h的最佳工艺条件下,酯化收率为81 0 %,收率比硫酸法、某些固体超强酸法

The hydrogenation and methyl esterification of furoic acid over Pd-Ni/γ-Al2O3 catalysts was investigated in fixed bed micro-reactor under different conditions such as reaction temperature,pressure,H2 space velocity,space velocity of furoic acid and methol,ratio of H2 and furoic acid and so on.

酸、甲醇、氢气为原料,采用连续流动固定床微反应器,Pd-Ni/γ-Al2O3为催化剂,使酸一步加氢甲酯化生成α-四氢酸甲酯。研究了反应的温度,压力,气、液体流速,进料流量等因素对催化反应的影响。结果表明:在1.5MPa,250℃,氢气空速3300 h-1,液体空速3.0 h-1(氢油比为50)时,酸转化率为96.6%,四氢酸甲酯的选择性97.2.0%,产率94.0%。催化剂稳定性较好,连续运转280小时后未见活性下降。该反应体系活性高,选择性好,反应压力低,催化剂性能稳定,操作简单,产物易分离

Furoin was synthesized with furfural as raw material in the presence of Vitamin B1(VB1) as a catalyst.

醛为原料,经维生素B1(VB1)催化合成偶姻。偶姻与不同的酰氯反应生成偶姻单酯。

The yields of compounds 1, 2, 3, 4, and 5 based on furoin were 99.3%, 96.5%, 98.0% 99.4% and 98.7%, respectively.

醋酸偶姻酯(1)、月桂酸偶姻酯(2)、苯甲酸偶姻酯(3)、α-呋喃甲酸偶姻酯(4)和3-α-呋喃丙烯酸偶姻酯(5)的收率以偶姻计算,分别为99.3%、96.5%、98.0%、99.4%和98.7%。

Furoin was synthesized from furol with VB1 as the catalyst,which was then reacted with acetyl chloride, lauroyl chloride ,benzoyl chloride,α-furoyl chloride and 3-α-furyl acryloyl chloride,respectively;corresponding monoester compounds of furoin were synthesized in THF in the presence of sodium hydroxide under reflux.

醛为基础原料,经维生素B1催化合成偶姻,再由偶姻分别和乙酰氯、月桂酰氯、苯甲酰氯、α-呋喃甲酰氯和3-α-呋喃烯丙酰氯反应,在NaOH/无水THF体系中,于水浴回流条件下合成了相对应的偶姻单酯类化合物。

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As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸,那乌黑、忧郁的眼睛,她便会相信,他一定作过不幸的爱情的受害者。

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也许他们将在壶穴里消失

But because of its youthful corporate culture—most people are hustled out of the door in their mid-40s—it had no one to send.

但是因为该公司年轻的企业文化——大多数员工在40来岁的时候都被请出公司——一时间没有好的人选。