化工设备安装实验

兔子土2022-10-04 11:39:541条回答

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kittysasa 共回答了14个问题 | 采纳率100%: 强度试验、气密试验等等.; 1年前

化工专业英语,In this way,to take one example,the stereocentersin t 化工专业英语, In this way,to take one example,the stereocenters in the terpenoid side chain of tocopherols could be introduced stereoselectively (Fig. 3),providing an attractive route to these biologically and economically important fat-soluble antioxidants,which are the main components of vitamin E.Despite considerable effort in various laboratories,no commercially viable stereoselective total synthesis of (RRR)-tocopherols has been developed so far (25). 初冬时节1年前1: 刘魔王9 共回答了11个问题 | 采纳率90.9%

下面是我自己翻的,本人是英语专业,化学的东西只有中学学过,不太懂,有什么不妥的请多指教.
举个例子来说,可以通过这种方式立体定向地引入生育酚中萜稀侧链的中心部分（图3）,为生物和经济角度重要的脂溶性抗氧化剂——即维他命E的主要成分提供有利的通道.尽管很多实验室做出了相关的努力研究,目前为止还没有研发出任何商业性可存活的立体定向生育酚化合物.

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化工有限责任公司英文 空想天才1年前1: 山茶花开共回答了21个问题 | 采纳率100%

化工有限责任公司翻译：
chemical limited liability company
通常习惯上简写为：Chemical Co.,Ltd

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农药属于化工还是药剂? silverfox-yh1年前1: xpxpxp_xp 共回答了23个问题 | 采纳率82.6%

1、要想说明这个问题,首先要了解一下化工和农药的概念.
化工通常是指化学工业或化学工程,简单地说就是运用化学方法改变物质组成或结构、或合成新物质的过程,就是化工.
农药是指用于预防、消灭或者控制危害农业、林业的病、虫、草和其他有害生物以及有目的地调解植物、昆虫生长的化学合成或者来源于生物、其他天然物质的一种物质或者几种物质的混合物及其制剂.
根据生产农药原料的来源可分为无机农药、有机农药（化学农药）、植物性农药、微生物农药.此外,还有昆虫激素.
其中只有有机农药（化学农药）是通过一系列化学工艺生产出来的,所以只有有机农药（化学农药）符合化工的范畴,但由于农药兴起于无机农药,兴盛在化学农药,发展方向是植物性农药、微生物农药,目前应用的农药品种90%以上都是化学农药,而且农药化工,是化工的一个重要分支,所以一般情况下现在还是按习惯把农药归为化工类.
2、农药药剂与化工不是平行的概念.它是可应用于生产农药的制剂的通称,所有的农药制剂都可以称作药剂.

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化工TDI报价 xingfuzxj1年前1: lute8022 共回答了25个问题 | 采纳率96%

现在价格在26000元/吨左右,甲苯二异氰酸酯

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化工原理吸收英文文章 晓风冰凌1年前1: 骚家瓜瓜共回答了10个问题 | 采纳率90%

Absorption,in chemistry,is a physical or chemical phenomenon or a process in which atoms,molecules,or ions enter some bulk phase - gas,liquid or solid material.This is a different process from adsorption,since molecules undergoing absorption are taken up by the volume,not by the surface (as in the case for adsorption).A more general term is "sorption",which covers absorption,adsorption and ion exchange.Absorption is basically where something takes in another substance.[1]
If absorption is a physical process not accompanied by any other physical or chemical process,it usually follows the Nernst partition law:
"the ratio of concentrations of some solute species in two bulk phases in contact is constant for a given solute and bulk phases"[citation needed];
The value of constant KN depends on temperature and is called partition coefficient.This equation is valid if concentrations are not too large and if the species "x" does not change its form in any of the two phases "1" or "2".If such molecule undergoes association or dissociation then this equation still describes the equilibrium between "x" in both phases,but only for the same form - concentrations of all remaining forms must be calculated by taking into account all the other equilibria.[1]
In the case of gas absorption,one may calculate its concentration by using e.g.the Ideal gas law,c = p/RT.Alternatively,one may use partial pressures instead of concentrations.
In many technologically important processes,the chemical absorption is used in place of the physical process,e.g.absorption of carbon dioxide by sodium hydroxide - such processes do not follow the Nernst partition law.
For some examples of this effect see liquid-liquid extraction,it is possible to extract from one liquid phase to another a solute without a chemical reaction.Examples of such solutes are noble gases and osmium tetroxide.
[edit] Other examples
An old method of gold mining involves the absorption of gold into mercury.
A more current use of this word in is reference to spectrophotometry where the amount of light absorbed by a chemical bond is measured.

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化工部分 huppyli1年前1: hn_yz_laojiang 共回答了17个问题 | 采纳率82.4%

http://wenku.baidu.com/view/fbbd5322192e45361066f59e.html
免费的,是2010高考化学试题分类汇编,可以有所得.

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化工专业英语翻译2determined with a Redlich-Kwong-Soave equation of s
化工专业英语翻译2
determined with a redlich-kwong-soave equation of state

with boston-mathias modiﬁcation, through the aspen proper-

ties code. the pressure inside the reactor is controlled and

regulated with a back pressure controller (bpc; brooks 5866

series). a rupture disk is located before the bpc for safety

reasons. a bypass is used to achieve the desired pressure inside

the reactor more rapidly. the liquid phase is fed in through a

syringe pump (teledyne isco model 500d), connected to a

pressure transducer and computer controlled. the syringe

temperature can be controlled. gas and liquids mix at a

t-connection before the reactor. a regulation valve is used to

sample the instantaneous liquid phase, while a 1.5 l ***

provides gas-liquid separation, accumulating all the liquid

product. all the piping is made of stainless steel aisi 316, 1/8

in. size. the catalyst bed (0.5 cm long) is placed between two

quartz wool plugs. above the upstream quartz wool plug, quartz

sand is used to improve mixing. temperature inside the reactor

is measured with a k-thermocouple before the catalyst bed. the

apparatus is in a fume hood, with a h2 sensor that can

automatically switch off h2 ﬂow to the reactor.

h2o2 experiments and analyses. h2o2 decomposition and

hydrogenation were investigated ﬁrst, at 10 bar and -10 °c,

with 0.5% h2o2 in methanol as the liquid phase, varying its

ﬂow rate (0.5, 1, and 2 ml/min). the gas mixture was either

n2/co2 (20/80% mol) for pure decomposition, or h2/n2/co2

(2/18/80% mol) for hydrogenation experiments (n2 replaces o2),

varying its ﬂow rates (0.1, 1, 2, 2.7, 4, 6, 9,and 12 ml/min)

qaz1047891年前1: 鲁宁共回答了14个问题 | 采纳率85.7%

与Redlich-Kwong-Soave状态方程确定
波士顿马蒂亚斯Modiﬁ阳离子,通过适当的白杨—
关系代码.反应器内的压力控制
一个背压控制器调节（BPC；布鲁克斯5866
系列）.破裂盘位于前安全BPC
原因.旁路是用来实现所需的内部压力
反应更迅速.液相是美联储通过
注射泵（Teledyne公司新型500D）,连接到一个
压力传感器和计算机控制.注射器
温度可以控制.气体和液体混合在一个
在反应器的T接.调节阀用于
样品的瞬时液相,而1.5 L罐
提供气液分离,积累的所有液体
产品.所有的管道是由不锈钢AISI 316,1 / 8
在.大小.催化剂床（0.5厘米长）之间放置两个
石英棉塞.在上游的石英棉塞,石英
沙子是用来改善混合.反应器内的温度
是在催化剂床层的K型热电偶测量.的
装置在油烟机,一个可以H2传感器
自动切断氢气ﬂ如何反应.
过氧化氢的实验和分析.过氧化氢分解
研究了ﬁRST进行加氢,在10条和10°C,
用0.5%过氧化氢在甲醇作为液相,改变其
ﬂ流量（0.5,1,和2毫升/分钟）.气体混合物是
氮气/二氧化碳（20／80%μmol）纯分解,或H2／N2和CO
（2 / 18 / 80% mol）加氢实验（N2取代O2）,
不同的ﬂOW率（0.1,1,2,2.7,4,6,9,和12毫升/分钟）

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化学化工哪个赚钱? 玩世不恭小无赖1年前1: superkyy 共回答了14个问题 | 采纳率78.6%

从大行业上来说,当然是化工赚钱.但是就个人来说,就要看具体的工作岗位了.一般来说,化工行业的高级工程师收入还都是不错的.但是搞化学甚至就是专门搞实验室研究的也不乏赚大钱的个例.
有一次我听了一个报告,做报告的人就是专门搞实验室研究的,他合成了一个化合物,是一个药品.合成路线卖了二点几亿美元.他当时的老板说,钱对于他没有什么意义,就给实验室的几个人分了.

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怎样安全储藏化工硫酸 可爱h1年前2: aikuku000 共回答了25个问题 | 采纳率88%

化工硫酸一般都是以浓硫酸来储存的.
浓硫酸存储罐——使用纯聚乙烯原料和钢罐体通过先进滚塑工艺技术加工而成的产品.通俗讲为外表层的碳钢层,内层为聚乙烯塑料层,二层通过热熔相嵌龟甲钢网紧密连接的钢塑复合产品.具有聚乙烯储罐一切特点,另外还具有刚性强度大、耐温性好、可耐真空和低压等特点,罐体外形尺寸和接口人孔位置可以任意改变
也可以用铝罐来储存浓硫酸.因为铝在浓硫酸中会发生钝化,在铝表面形成致密氧化膜

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化工设备安装实验

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