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Industrial Chemicals by Fermentation

Synthesis of industrial chemicals by microbial cells may be by fermentation (free, living cells), immobilised growing cells, immobilised resting cells or immobilised dead cells. [Pg.17]

Fast increasing crude oil prices and projected dwindling output mean that fermentation processes become more and more attractive. There are indeed a number of industrial projects aimed at producing relatively simple chemicals by fermentation, notably methionine, acrylic acid and succinic acid. [Pg.261]

The modem fermentation industries developed from the early era of antibiotics. Over 4000 antibiotics have been discovered since the 1950s. However, only about 100 are produced on a commercial scale and over 40 of these are prepared by a combination of microbial synthesis and chemical modifications. Antibiotics produced by fermentation and used as starting materials in chemical syntheses are given in Table 2. [Pg.178]

Poly(malic acid) is of pharmaceutical interest because its chemical derivatives may harbor both tissue-specific homing molecules and therapeutic effectors to be used for tissue (tumor) targeting in chemotherapy [2]. Because of its efficient production by fermentation, its biodegradability and nontoxicity, it is also considered as raw material in the industrial production of detergents, glues, and plastic materials. [Pg.93]

Table 9.6 Examples of hydroxylation of steroid nuclei by micro-organisms. (Data derived from Neidleman, SL "Industrial Chemicals Fermentation and Immobilised Cells" in "Biotechnology the Science and the Business", edited by Moses V and Cape RB, published by Harwood Academic, London 1991). Table 9.6 Examples of hydroxylation of steroid nuclei by micro-organisms. (Data derived from Neidleman, SL "Industrial Chemicals Fermentation and Immobilised Cells" in "Biotechnology the Science and the Business", edited by Moses V and Cape RB, published by Harwood Academic, London 1991).
Ethanol. Ethanol is the most important chemical produced by fermentation, and it has the potential to become a major feedstock for the chemical industry since many other large-scale chemicals can be produced from ethanol. In fact, ethanol can in many respects be considered a renewable alternative to ethylene, which is the largest volume carbon-containing chemical produced from fossil resources today. Via catalytic dehydration, ethanol can easily be converted into ethylene and diethyl ether, both of which are well-known acid catalyzed processes. Almost all available... [Pg.25]

Other important raw material uses of ethyl alcohol are conversion to esters and ethers, vinegar, ethyl chloride, butadiene, styrene, and chloral (for DDT). Nearly all the new developments in chemicals from ethyl alcohol, particularly the four-, six-, and eight-carbon derivatives are based on alcohol derived from petroleum. The butyl alcohol and butyl acetate so made supplement the production by fermentation and from oxidation of hydrocarbons and synthesis gas operations. The consumption of ethyl alcohol for all industrial uses (denatured alcohol) exceeded 1.2 billion pounds (100% basis) in 1950. More than 700,000,000 pounds of this were made from petroleum. [Pg.295]

Lactose is readily fermented by lactic acid bacteria, especially Lactococcus spp. and Lactobacillus spp., to lactic acid, and by some species of yeast, e.g. Kluyveromyces spp., to ethanol (Figure 2.27). Lactic acid may be used as a food acidulant, as a component in the manufacture of plastics, or converted to ammonium lactate as a source of nitrogen for animal nutrition. It can be converted to propionic acid, which has many food applications, by Propionibacterium spp. Potable ethanol is being produced commercially from lactose in whey or UF permeate. The ethanol may also be used for industrial purposes or as a fuel but is probably not cost-competitive with ethanol produced by fermentation of sucrose or chemically. The ethanol may also be oxidized to acetic acid. The mother liquor remaining from the production of lactic acid or ethanol may be subjected to anaerobic digestion with the production of methane (CH4) for use as a fuel several such plants are in commercial use. [Pg.62]

Controlled Oxidative Fermentations—by which a number of industrial chemicals are produced. Citromyces. for example, can be used fur the production of citric acid from sugar. Aspergillus niger will yield oxalic acid by partial oxidative fermentation, but if the mold is permitted to remain in contact with the acid, il will convert it to carbon dioxide. [Pg.608]

A dilute solution of ethanol is obtained, which can be concentrated by distillation to a constant-boiling point mixture that contains 95.6% ethanol by weight. Dehydration of the remaining few percent of water to give absolute alcohol is achieved either by chemical means or by distillation with benzene, which results in preferential separation of the water. Ethanol also is made in large quantities by fermentation, but this route is not competitive for industrial uses with the hydration of ethene. Isopropyl alcohol and tert-butyl alcohol also are manufactured by hydration of the corresponding alkenes. [Pg.607]

The potential for industrial biotech has been broadly recognized and chemical and biotech companies are starting to move into this space and grow their presence. In fact, about five percent of the estimated USD 1.2 trillion total chemical sales already depend on biotech. The global market for bio-based ethanol alone is worth USD 15 billion other basic organic molecules such as citric acid (USD two billion) and lactic acid are produced by fermentation, and so are all but three amino acids (approx. USD four billion) various basic, advanced and active pharmaceutical ingredients produced by the fine chemical industry are worth USD 7.5 billion the attractive enzyme market has reached USD two billion in... [Pg.375]


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