化学工程与工艺专业英语课文翻译.pdf

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1、Unit 1ChemicalIndustry化学工业Before reading the text below, try to answer followingquestion:1. When did the modern chemical industry start?2. Can you give a definition for the chemical industry?3. What are the contribution which the chemical industry hasmade to meet and satisfy our needs? of the Chemic

2、al Industry Although the use of chemicals dates back to the ancient civilizations, theevolution of what we know as the modern chemical industry started much more recently.It may be considered to have begun during the Industrial Revolution, about 1800,and developed to provide chemicals roe use by oth

3、er industries. Examples are alkalifor soapmaking, bleaching powder for cotton, and silica and sodium carbonate forglassmaking. It will be noted that these are all inorganic chemicals. The organicchemicals industry started in the 1860s with the exploitation of William HenryPerkins discovery if the fi

4、rst synthetic dyestuffmauve. At the start of thetwentieth century the emphasis on research on the applied aspects of chemistry inGermany had paid off handsomely, and by 1914 had resulted in the German chemicalindustry having 75% of the world market in chemicals. This was based on the discoveryof new

5、 dyestuffs plus the development of both the contact process for sulphuric acidand the Haber process for ammonia. The later required a major technologicalbreakthrough that of being able to carry out chemical reactions under conditionsof very high pressure for the first time. The experience gained wit

6、h this was tostand Germany in good stead, particularly with the rapidly increased demand fornitrogen-based compounds (ammonium salts for fertilizers and nitric acid forexplosives manufacture) with the outbreak of world warin 1914. This initiatedprofound changes which continued during the inter-war y

7、ears (1918-1939).1 化学工业的起源尽管化学品的使用可以追溯到古代文明时代， 我们所谓的现代化学工业的发展却是非常近代（才开始的） 。可以认为它起源于工业革命其间，大约在1800 年，并发展成为为其它工业部门提供化学原料的产业。 比如制肥皂所用的碱，棉布生产所用的漂白粉， 玻璃制造业所用的硅及 Na2CO3. 我们会注意到所有这些都是无机物。 有机化学工业的开始是在十九世纪六十年代以 William Henry Perkin 发现第一种合成染料苯胺紫并加以开发利用为标志的。20 世纪初，德国花费大量资金用于实用化学方面的重点研究，到1914 年，德国的化学工业在世界化学产品市场

8、上占有75%的份额。这要归因于新染料的发现以及硫酸的接触法生产和氨的哈伯生产工艺的发展。 而后者需要较大的技术突破使得化学反应第一次可以在非常高的压力条件下进行。这方面所取得的成绩对德国很有帮助。特别是由于1914 年第一次世界大仗的爆发，对以氮为基础的化合物的需求飞速增长。这种深刻的改变一直持续到战后（1918-1939） 。date bake to/from: 回溯到dated: 过时的，陈旧的stand sb. in good stead: 对。 。 。很有帮助Since 1940 the chemical industry has grown at a remarkable rate,

9、 although thishas slowed significantly in recent years. The lions share of this growth has beenin the organic chemicals sector due tothe development and growth of thepetrochemicals area since 1950s. The explosives growth in petrochemicals in the1960s and 1970s was largely due to the enormous increas

10、e in demand for syntheticpolymers such as polyethylene, polypropylene, nylon, polyesters and epoxy resins.1940 年以来，化学工业一直以引人注目的速度飞速发展。尽管这种发展的速度近年来已大大减慢。化学工业的发展由于 1950 年以来石油化学领域的研究和开发大部分在有机化学方面取得。 石油化工在 60 年代和 70 年代的迅猛发展主要是由于人们对于合成高聚物如聚乙烯、聚丙烯、尼龙、聚脂和环氧树脂的需求巨大增加。The chemical industry today is a very di

11、verse sector of manufacturing industry,within which it plays a central role. It makes thousands of different chemicals whichthe general public only usually encounter as end or consumer products. These productsare purchased because they have the required properties which make them suitablefor some pa

12、rticular application, . a non-stick coating for pans or a weedkiller.Thus chemicals are ultimately sold for the effects that they produce.今天的化学工业已经是制造业中有着许多分支的部门，并且在制造业中起着核心的作用。它生产了数千种不同的化学产品， 而人们通常只接触到终端产品或消费品。 这些产品被购买是因为他们具有某些性质适合（人们）的一些特别的用途，例如，用于盆的不粘涂层或一种杀虫剂。这些化学产品归根到底是由于它们能产生的作用而被购买的。2. Definit

13、ion of the Chemical IndustryAt the turn ofthe century there would have been little difficulty in definingwhat constituted the chemical industrysince only a verylimited range of productswas manufactured and these were clearly chemicals, ., alkali, sulphuric acid. Atpresent, however, many intermediate

14、s to products produced, from raw materials likecrude oil through (in some cases) many intermediates to products which may be useddirectly as consumer goods, or readily converted into them. The difficulty conesin deciding at which point in this sequence the particular operation ceases to bepart of th

15、e chemical industrys sphere of activities. To consider a specific exampleto illustrate this dilemma, emulsion paints may contain poly (vinyl chloride) / poly(vinyl acetate). Clearly, synthesis of vinyl chloride (or acetate) and itspolymerization are chemical activities. However, if formulation and m

16、ixing of thepaint, including the polymer, is carried out by a branch of the multinationalchemical company which manufactured the ingredients, is this still part of thechemical industry of does it mow belong in the decorating industry?2 化学工业的定义在本世纪初， 要定义什么是化学工业是不太困难的， 因为那时所生产的化学品是很有限的，而且是非常清楚的化学品，例如，

17、烧碱，硫酸。然而现在有数千种化学产品被生产，从一些原料物质像用于制备许多的半成品的石油， 到可以直接作为消费品或很容易转化为消费品的商品。 困难在于如何决定在一些特殊的生产过程中哪一个环节不再属于化学工业的活动范畴。举一个特殊的例子来描述一下这种困境。乳剂漆含有聚氯乙烯/聚醋酸乙烯。显然，氯乙烯（或醋酸乙烯）的合成以及聚合是化学活动。然而，如果这种漆，包括高聚物，它的配制和混合是由一家制造配料的跨国化学公司完成的话， 那它仍然是属于化学工业呢还是应当归属于装饰工业中去呢？It is therefore apparent that, because of its diversity of ope

18、rations and closelinks in many areas with other industries, there is no simple definition of thechemical industry. Instead each official body which collects and publishesstatistics on manufacturing industry will have its definition as to which operationsare classified as the chemical industry. It is

19、 important to bear this in mind whencomparing statistical information which is derived from several sources.因此，很明显，由于化学工业经营的种类很多并在很多领域与其它工业有密切的联系，所以不能对它下一个简单的定义。 相反的每一个收集和出版制造工业统计数据的官方机构都会对如何届定哪一类操作为化学工业有自己的定义。 当比较来自不同途径的统计资料时， 记住这点是很重要的。3. The Need for Chemical IndustryThe chemical industry is conc

20、erned with converting raw materials, such as crudeoil, firstly into chemical intermediates and then into a tremendous variety of otherchemicals. These are then used to produce consumer products, which make our livesmore comfortable or, in some cases such as pharmaceutical produces, help to maintaino

21、ur well-being or even life itself. At each stage of these operations value is addedto the produce and provided this added exceeds the raw material plus processing coststhen a profit will be made on the operation. It is the aim of chemical industry toachieve this.3 对化学工业的需要化学工业涉及到原材料的转化，如石油 首先转化为化学中间

22、体，然后转化为数量众多的其它化学产品。 这些产品再被用来生产消费品， 这些消费品可以使我们的生活更为舒适或者作药物维持人类的健康或生命。 在生产过程的每一个阶段， 都有价值加到产品上面， 只要这些附加的价值超过原材料和加工成本之和， 这个加工就产生了利润。 而这正是化学工业要达到的目的。It may seem strange in textbook this one to pose the question “do we need achemical industry?” However trying to answer this question will provide() anindic

23、ation of the range of the chemical industrys activities, () its influenceon our lives in everyday terms, and () how great is societys need for a chemicalindustry. Our approach in answering the question will be to consider the industryscontribution to meeting and satisfying our major needs. What are

24、these? Clearly food(and drink) and health are paramount. Other which we shall consider in their turnare clothing and (briefly) shelter, leisure and transport.在这样的一本教科书中提出： “我们需要化学工业吗？”这样一个问题是不是有点奇怪呢？然而，先回答下面几个问题将给我们提供一些信息： （1）化学工业的活动范围， （2）化学工业对我们日常生活的影响， （3）社会对化学工业的需求有多大。 在回答这些问题的时候我们的思路将要考虑化学工业在满足

25、和改善我们的主要需求方面所做的贡献。 是些什么需求呢？很显然，食物和健康是放在第一位的。其它我们要考虑的按顺序是衣物、住所、休闲和旅行。(1) Food. The chemical industry makes a major contribution to food productionin at least three ways. Firstly, by making available large quantities of artificialfertilizers which are used to replace the elements (mainly nitrogen, pho

26、sphorus andpotassium) which are removed as nutrients by the growing crops during modernintensive farming. Secondly, by manufacturing crop protection chemicals, .,pesticides, which markedly reduce the proportion of the crops consumed by pests.Thirdly, by producing veterinary products which protect li

27、vestock from disease orcure their infections.(1)食物。化学工业对粮食生产所做的巨大贡献至少有三个方面。第一，提供大量可以获得的肥料以补充由于密集耕作被农作物生长时所带走的营养成分。 （主要是氮、磷和钾） 。第二，生产农作物保护产品，如杀虫剂，它可以显著减少害虫所消耗的粮食数量。第三，生产兽药保护家禽免遭疾病或其它感染的侵害。(2) Health. We are all aware of the major contribution which the pharmaceuticalsector of the industry has made to

28、 help keep us all healthy, . by curing bacterialinfections with antibiotics, and even extending life itself, . blockers to lowerblood pressure.（2）健康。我们都很了解化学工业中制药这一块在维护我们的身体健康甚至延长寿命方面所做出的巨大贡献，例如，用抗生素治疗细菌感染，用-抗血栓降低血压。(3) Clothing. The improvement in properties of modern synthetic fibers over thetradi

29、tional clothing materials . cotton and wool) has been quite remarkable. Thusshirts, dresses and suits made from polyesters like Terylene and polyamides likeNylon are crease-resistant, machine-washable, and drip-dry or non-iron. They arealso cheaper than natural materials.衣物。在传统的衣服面料上， 现代合成纤维性质的改善也是非

30、常显著的。 用聚脂如涤纶或聚酰胺如尼龙所制作的T 恤、上衣、衬衫抗皱、可机洗，晒干自挺或免烫，也比天然面料便宜。Parallel developments in the discovery of modern synthetic dyes and thetechnology to “bond” them to the fiber has r esulted in a tremendous increase inthe variety of colors available to the fashion designer. Indeed they now span almostevery col

31、or and hue of the visible spectrum. Indeed if a suitable shade is notavailable, structural modification of an existing dye to achieve this can readilybe carried out, provided there is a satisfactory market for the product.与此同时， 现代合成染料开发和染色技术的改善使得时装设计师们有大量的色彩可以利用。的确他们几乎利用了可见光谱中所有的色调和色素。事实上如果某种颜色没有现成的

32、，只要这种产品确有市场，就可以很容易地通过对现有的色彩进行结构调整而获得。Other major advances in this sphere have been in color-fastness, ., resistanceto the dye being washed out when the garment is cleaned.这一领域中另一些重要进展是不褪色，即在洗涤衣物时染料不会被洗掉。(4) Shelter, leisure and transport. In terms of shelter the contribution ofmodern synthetic polym

33、ers has been substantial. Plastics are tending to replacetraditional building materials like wood because they are lighter, maintenance-free .they are resistant to weathering and do not need painting). Other polymers, .urea-formaldehyde and polyurethanes, are important insulating materials forreduci

34、ng heat losses and hence reducing energy usage.（4）住所，休闲和旅游。讲到住所方面现代合成高聚物的贡献是巨大的。塑料正在取代像木材一类的传统建筑材料，因为它们更轻，免维护（即它们可以抵抗风化，不需油漆）。另一些高聚物，比如，脲甲醛和聚脲，是非常重要的绝缘材料可以减少热量损失因而减少能量损耗。Plastics and polymers have made a considerable impact on leisure activities withapplications ranging from all-weather artificial s

35、urfaces for athletic tracks,football pitches and tennis courts to nylon strings for racquets and items like golfballs and footballs made entirely from synthetic materials.塑料和高聚物的应用对休闲活动有很重要的影响， 从体育跑道的全天候人造篷顶， 足球和网球的经纬线，到球拍的尼龙线还有高尔夫球的元件，还有制造足球的合成材料。Likewise the chemical industrys contribution to tran

36、sport over the years hasled to major improvements. Thus development of improved additives like anti-oxidantsand viscosity index improves for engine oil has enabled routine servicing intervalsto increase from 3000 to 6000 to 12000 miles. Research and development work has alsoresulted in improved lubr

37、icating oils and greases, and better brake fluids. Yet againthe contribution of polymers and plastics has been very striking with the proportionof the total automobile derived from these materials dashboard, steering wheel,seat padding and covering etc.now exceeding 40%.多年来化学工业对旅游方面所作的贡献也有很大的提高。 一些添

38、加剂如抗氧化剂的开发和发动机油粘度指数改进使汽车日产维修期限从 3000 英里延长到 6000 英里再到 12000 英里。研发工作还改进了润滑油和油脂的性能， 并得到了更好的刹车油。 塑料和高聚物对整个汽车业的贡献的比例是惊人的，源于这些材料挡板，轮胎，坐垫和涂层等等超过40%。So it is quite apparent even from a brief look at the chemical industryscontribution to meeting our major needs that life in the world would be very differentw

39、ithout the products ofthe industry. Indeed the levelof a countrys developmentmay be judged by the productionlevel and sophistication of its chemical industry.很显然简单地看一下化学工业在满足我们的主要需求方面所做的贡献就可以知道， 没有化工产品人类社会的生活将会多么困难。 事实上， 一个国家的发展水平可以通过其化学工业的生产水平和精细程度来加以判断。4. Research and Development (R&D) in Chemical

40、 IndustriesOne of the main reasons for the rapid growth of the chemical industry in thedeveloped world has been its great commitment to, and investment in research anddevelopment (R&D). A typical figure is 5% of sales income, with this figure beingalmost doubled for the most research intensive secto

41、r, pharmaceuticals. It isimportant to emphasize that we are quoting percentages here not of profits but ofsales income, . the total money received, which has to pay for raw materials,overheads, staff salaries, etc. as well. In the past this tremendous investment haspaid off well, leading to many use

42、ful and valuable products being introduced to themarket. Examples include synthetic polymers like nylons and polyesters, and drugsand pesticides. Although the number of new products introduced to the market hasdeclined significantly in recent years, and in times of recession the researchdepartment i

43、s usually one of the first to suffer cutbacks, the commitment to R&Dremains at a very high level.4 化学工业的研究和开发。发达国家化学工业飞速发展的一个重要原因就是它在研究和开发方面的投入和投资。 通常是销售收入的 5%，而研究密集型分支如制药，投入则加倍。要强调这里我们所提出的百分数不是指利润而是指销售收入， 也就是说全部回收的钱， 其中包括要付出原材料费， 企业管理费，员工工资等等。过去这笔巨大的投资支付得很好， 使得许多有用的和有价值的产品被投放市场，包括一些合成高聚物如尼龙和聚脂， 药品和

44、杀虫剂。尽管近年来进入市场的新产品大为减少， 而且在衰退时期研究部门通常是最先被裁减的部门， 在研究和开发方面的投资仍然保持在较高的水平。The chemical industry is a very high technology industry which takes fulladvantage of the latest advances in electronics and engineering. Computers are verywidely used for all sorts of applications, from automatic control of chemic

45、al plants,to molecular modelingof structures of new compounds, to the control of analyticalinstruments in the laboratory.化学工业是高技术工业，它需要利用电子学和工程学的最新成果。计算机被广泛应用，从化工厂的自动控制，到新化合物结构的分子模拟，再到实验室分析仪器的控制。Individual manufacturing plants have capacities ranging from just a few tonesper year in the fine chemica

46、ls area to the real giants in the fertilizer andpetrochemical sectors which range up to 500,000 tonnes. The latter requires enormouscapital investment, since a single plant of this size can now cost $520 million!This, coupled with the widespread use of automatic control equipment, helps toexplain wh

47、y the chemical industry is capital-rather than labor-intensive.一个制造厂的生产量很不一样， 精细化工领域每年只有几吨， 而巨型企业如化肥厂和石油化工厂有可能高达 500,000 吨。 后者需要巨大的资金投入， 因为一个这样规模的工厂要花费 2 亿 5 千万美元， 再加上自动控制设备的普遍应用， 就不难解释为什么化工厂是资金密集型企业而不是劳动力密集型企业。The major chemical companies are truly multinational and operate their salesand marketing

48、 activities in most of the countries of the world, and they also havemanufacturing units in a number of countries. This international outlook foroperations, or globalization, is a growing trend within the chemical industry, withcompanies expanding their activities either by erecting manufacturing un

49、its in othercountries or by taking over companies which are already operating there.大部分化学公司是真正的跨国公司， 他们在世界上的许多国家进行销售和开发市场， 他们在许多国家都有制造厂。这种国际间的合作理念， 或全球一体化，是化学工业中发展的趋势。大公司通过在别的国家建造制造厂或者是收购已有的工厂进行扩张。Unit 2 Research and Development研究和开发Research and development, or R&D as it is commonly referred to, is

50、an activitywhich is carried out by all sectors of manufacturing industry but its extent variesconsiderably, as we will see shortly. Let us first understand, or at least geta feel for, what the terms mean. Although the distinction between research anddevelopment is not always clear-cut, and there is