Market demands

Quantity Demanded in Millions of Light Vehicle Sales 

Market determination Vehicle performance targets Vehicle mass targets8 

Associated power train cooling requirements8 Vehicle speed 

Windshield clearance/defrost8 Environmental targets C02 emissions8 MPG targets8 Architecture development Concept development Program framing 

Long lead item development (sheet metal, HVAC, power train, frame, etc.)8 

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Production levels will be influenced by external factors such as agreed production targets, market demand, the level of market demand for a particular product, agreements with contractors, and legislation. These factors are managed by planning of production rates and management of the production operation. 

The ceUulose polymer and its conversion routes have already proved to be capable of adaptation to meet a wide range of market demands. The advances being made in getting ceUulose into solution with minimal environmental impact augur weU for the development of streamlined routes from tree to fiber or fabric. 

World markets for vegetable fibers have been steadily declining in recent years, mainly as a result of substitution with synthetic materials. Jute has traditionally been one of the principal bast fibers (toimage basis) sold on the world market however, the precipitous decline in jute exports by India (Fig. 2) indicate the decreasing market demand for this fiber that is vitally important to the economies of India (West Bengal), Bangladesh, and Pakistan. 

Gasohol in the United States. Over 90% of the fuel ethanol in the United States is produced from com. Typically, 0.035 m (1 bushel) of com yields 9.5 L (2.5 gal) of ethanol. Ethanol is produced by either dry or wet milling (87). Selection of the process depends on market demand for the by-products of the two processes. More than two-thirds of the ethanol in the United States is produced by wet milling. Depending on the process used, the full cost of ethanol after by-product credits has been estimated to be between 0.25—0.53/L ( 1—2/gal) for new plants (88). Eeedstock costs are a significant factor in the production of fuel ethanol. A change in com price of 0.29/m ( 1.00/bushel) affects the costs of ethanol by 0.08/L ( 0.30/gal). 

Residential and commercial fuel demands represent about 24% of total U.S. LPG consumption. Although this market demand is weather dependent, it has assumed the characteristics of a mature market. Growth is related to the general economic trends. 

Researchers at Phillips Petroleum Company developed a commercially viable process for the synthesis of PPS involving the polymerization of /)-dich1orohenzene and a sodium sulfide source in a polar organic compound at elevated temperature and pressure. This Phillips process was patented in 1967 (18). Between 1967 and 1973, Phillips built and operated a pilot plant, estabhshed market demand, and constmcted a hiU-scale commercial plant. In 1973, the world s first PPS plant came on-stream in Phillips faciUty in Borger, Texas. 

Some polymers from styrene derivatives seem to meet specific market demands and to have the potential to become commercially significant materials. For example, monomeric chlorostyrene is useful in glass-reinforced polyester recipes because it polymerizes several times as fast as styrene (61). Poly(sodium styrenesulfonate) [9003-59-2] a versatile water-soluble polymer, is used in water-poUution control and as a general flocculant (see Water, INDUSTRIAL WATER TREATMENT FLOCCULATING AGENTs) (63,64). Poly(vinylhenzyl ammonium chloride) [70304-37-9] h.a.s been useful as an electroconductive resin (see Electrically conductive polya rs) (65). 

Instant tea is manufactured in the United States, Japan, Kenya, Chile, Sri Lanka, India, and China. Production and consumption in the United States is greater than in the rest of the world. World production capacity of instant teas depends on market demand but is in the range of 8,000 to 11,000 t/yr (3). The basic process for manufacture of instant tea as a soluble powder from dry tea leaf includes extraction, concentration, and drying. In practice, the process is considerably more compHcated because of the need to preserve the volatile aroma fraction, and produce a product which provides color yet is soluble in cold water, all of which are attributes important to iced tea products (88). 

Sales of thiophene in the 1990s amount to hundreds of metric tons per year. SuppHes are available worldwide from Synthetic Chemicals Ltd. (SCL) in the United Kingdom and Elf-Atochem SA in France. There is currendy no U.S. producer of thiophene or the principal thiophene derivatives. At these levels of demand, material is shipped in 200-hter dmms and in bulk quantities. Market price is dependent on the level of off-take. 3-Methylthiophene is also available from SCL, but demand is low and even lower in the case of 2-methylthiophene lower production and lower market demand have led to higher prices for these derivatives. 

Bromothiophene is produced in Europe by Solvay and SCL, at up to 50 metric tons per year, with a 98%-pure specification and prices commensurate with production levels. 3-Bromothiophene is stiU a specialty product as of the mid-1990s, produced in multipurpose plant by SCL in hundreds of kilos per year, but at this level of market demand and also on account of the complexity of the synthesis, it commands a relatively high price. 

The Phalaborwa complex ia the northeastern Transvaal is a complex volcanic orebody. Different sections are mined to recover magnetite, apatite, a copper concentrate, vermicuhte, and baddeleyite, Hsted in order of aimual quantities mined. The baddeleyite is contained in the foskorite ore zone at a zirconium oxide concentration of 0.2%, and at a lesser concentration in the carbonatite orebody. Although baddeleyite is recovered from the process tailings to meet market demand, the maximum output could be limited by the requirements for the magnetite and apatite. The baddeleyite concentrate contains ca 96% zirconium oxide with a hafnium content of 2% Hf/Zr + Hf. A comminuted, chemically beneficiated concentrate containing ca 99% zirconium oxide is produced also. 

Downstream Processing. In addition to extraction, various downstream operations are often carried out on the BTX product to produce products in proportions to fit the market demand. A typical aromatics processing scheme is shown in Eigure 8 in which ben2ene, xylene, and o-xylene are the products. 

The production of cerium derivatives begins with ore beneficiation and production of a mineral concentrate. Attack on that concentrate to create a suitable mixed lanthanide precursor for later separation processes follows. Then, depending on the relative market demand for different products, there is either direct production of a cerium-rich material, or separation of the mixed lanthanide precursor into individual pure lanthanide compounds including compounds of pure cerium, or both. The starting mineral determines how the suitable mixed lanthanide precursor is formed. In contrast the separation... 

Of the worldwide ethyleneamines capacity, over 50% is EDC-based the balance is rnonoethanolarnine-derived. A complete breakdown of the ethyleneamines capacity by product is not feasible siace most manufacturers can vary production mix to meet market demand. A rough estimate is that EDA represents about 40% of the total production of the family of ethyleneamines. In Europe, the product mix is skewed somewhat more toward EDA. Prices of the principal commercial polyamines ia 1992, ia the United States, are given ia Table 4. 

Manufacture. Much of the diethyl ether manufactured is obtained as a by-product when ethanol (qv) is produced by the vapor-phase hydration of ethylene (qv) over a supported phosphoric acid catalyst. Such a process has the flexibiHty to adjust to some extent the relative amounts of ethanol and diethyl ether produced in order to meet existing market demands. Diethyl ether can be prepared directly to greater than 95% yield by the vapor-phase dehydration of ethanol in a fixed-bed reactor using an alumina catalyst (21). 

Proeess integration was developed initially as a means of optimizing the design of ehemieal and petroehemieal proeess plants. Proeess optimization is still only a pre-eonstruetion or pre-produetion exereise. This is surprising beeause many proeess plants are designed for bateh manufaeture of a range of produets, eaeh of whieh will require eontinuously ehanging optimization parameters. Proeess optimization and re-optimization on the fly ean enable eompanies to meet variations in market demand and maximize produetion effieieney and overall profitability. 

A hydroskimming refinery lends itself to locations where the market demands for the major fuel products (gasoline, gas oil, and residual fuel oil) approximate the quantities of these products obtainable by distillation from the available crudes. A typical hydroskimming refinery would include the following ... 

As mentioned above, among many possible process variables, industrial crystallization frequently focuses on the optimization of particle size. In many cases this may be fixed by market demands, in others it may be a variable e.g. during the processing of intermediates. 

A simple model can be produced using the areas required for the various site activities for different scenarios. These might include redistribution of a company s manufacturing facilities, changes in the market demand, or simply increased factory output. 

The development of products in these categories has been guided by known market demands and many manufacturers have made use of established specifications for temporary protectives. 

Since the start-up of the first commercial FCC unit in 1942, many improvements have been made. These improvements have enhanced the unit s mechanical reliability and its ability to crack heavier, lower-value feedstocks. The FCC has a remarkable history of adapting to continual changes in market demands. Table 1-1 shows major developments in the history of the process. 

Optimization refers to maximizing feed rate and/or conversion with the existing equipment while reaching as many constraints as possible. It can be the response to changes in the feed quality, ambient conditions, or the market demands. Although it is not discussed separately here, it is the incentive for most debottlenecking projects. 

In conclusion, FCC has had a long history of innovations. New technological developments will continue to emerge, optimizing its performance. Its versatility and high degree of efficiency will continue to play a key role in meeting future market demands. 

Despite these advantages, deep (submerged) cultures were still deemed to be the most viable route to satisfying the market demand for penicillin. It was estimated that a surface culture equivalent to 2 hectares would be required to produce the same amount of penicillin as a deep culture equivalent to 5 x 104 litres. The desire to switch to deep cultures was thus driven by commercial consideration. 

In this chapter, by using the examples of -lactams we have briefly examined how microbial cultures may be used to produce sufficient antibiotics to meet market demands. We have also explained how enzymes (or cells) may be used to biotransform, and thereby diversify, antibiotics. By outlining the history of penicillin production, we explained how analysis and manipulation of culture regimes may be used to enhance the yields of antibiotics (and other secondary products). These studies led to die concept of directed biosynthesis by precursor feeding. 

The mature plastics industry is a worldwide, multibillion-dollar industry in which a steady flow of new or improved plastic materials, new or improved production processes, and new or improved market demands has caused rapid and tremendous growth in the use of plastics. For over a century the World of Plastics product production, with over a billion products, continues to expand enormously with the passing of time. Manufacturers are introducing new products in record time. The ability to shrink time-to-market schedules continues to evolve through the more knowledgeable application and behavior or familiarity of the different plastic ma-... 

Make Useful Coproducts. The success of this approach to process development is heavily dependent on the market situation but in suitable cases where there is market demand for the total output of both products such processes can be successful. Examples here are the coproduction of phenol and acetone, which is essentially noncatalytic, and the more recently developed process for the cooxidation of ethyl benzene and propylene to produce propylene oxide and styrene. 

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