Chemists, manufacturing

CH2C1 CH2C1. Colourless liquid with an odour like that of chloroform b.p. 84 C. It is an excellent solvent for fats and waxes. Was first known as oil of Dutch chemists . Manufactured by the vapour- or liquid-phase reaction of ethene and chlorine in the presence of a catalyst. It reacts with anhydrous ethano-ales to give ethylene glycol diethanoate and with ammonia to give elhylenediamine, these reactions being employed for the manufacture of these chemicals. It burns only with difficulty and is not decomposed by boiling water. 

Physical chemists Manufacturing chemists Computer scientists... 

It should be noted that a number of different enzyme preparations can now be purchased directly from manufacturing chemists. It must be emphasised that the activity of an enzyme, whether purchased or prepared in the laboratory, may vary between rather wide limits. The activity is dependent on the source of the enzyme, the presence of poisons and also on the temperature. It appears, for example, that the quality of horseradish peroxidase depends upon the season of the year at which the root is obtained from the ground. It cannot be expected therefore that all the experiments described below will work always with the precision characteristic of an organic reaction proceeding under accurately known conditions. 

Big name science houses and chemical manufacturers These include such names as Fisher, Baxter, VWR, Cole-Parmer, Alltech, Aldrich and Sigma. It is very hard to get a fledgling account with these giants, but if one can then the sky s the limit. Most chemists should be happy getting these companies products through the distributors. 

BENZALDEHYDE The precursor for speed. It makes up nearly 100% of bitter almond oil. Not a very popular oil with the DEA. Some hints Benzaldehyde is indispensable for the flavoring industry. It is the flavor in almond extract and synthetic benzaldehyde is used in all cherry flavorings. Also, there is currently a little loophole in the system when it comes to a product called Roasted Cassia Oil . Apparently, some manufacturers take cassia oil and run it through some sort of industrial process to change it into benzaldehyde. No one wanted to tell Strike the particulars of how this was done. But one company chemist gave me some hints (You can get really chatty with some of these guys). 

Those propylene species that the authors were using are no different than safrole or aiiyibenzene. In fact, safrole is a perfect substitute. Yowza Those recipes look awesome Now as Strike understands it, there has already been a detailed writeup of the by-the-numbers application of the above patent as written. This, Strike beiieves, can be found in Uncle Fester s Secrets of LSD Manufacture and/or Secrets of Methamphetamine Manufac-ture [18]. But our adventurous chemist Suniight came thru again and submitted a new, hybrid form of this method which she seems to have formulated after a lot of thought on the matter. So here again is Suniight ... 

Speed manufacturers need only look at the molecules and imagine them without those extra OHs or methylenedioxy ring structures attached to the benzene core. These particular pathways are, however, more uniquely suited for X precursor production because they take advantage of the hindrance that methylenedioxy ring structures and OHs provide on one side of the benzene core. This helps to better assure that mono chloromethylations or bro-minations will occur whereas di- and tri-substitutions are possible on a naked benzene molecule which speed chemists are going to be using (please don t ask). 

The attraction for research chemists lies, of course, not in further perfections of the machine — let this be done systematically by the manufacturers — but in intelligent modifications of the target molecules. Examples are given in section 5.1. 

This book is the result of a number of years experience in the compiling and editing of data useful to chemists. In it an effort has been made to select material to meet the needs of chemists who cannot command the unlimited time available to the research specialist, or who lack the facilities of a large technical library which so often is not conveniently located at many manufacturing centers. If the information contained herein serves this purpose, the compiler will feel that he has accomplished a worthy task. Even the worker with the facilities of a comprehensive library may find this volume of value as a time-saver because of the many tables of numerical data which have been especially computed for this purpose. 

J. A. Monick, Mlcohok, Their Chemist, Properties and Manufacture Reinhold Book Corp., New York, 1968, pp. 519—579. 

Fatty Jilcohols, Faw Materials, Methods, Uses, Henkel K.-G.a.A., Dusseldorf, 1982. Also pubHslied in German as Fettalkohole. J. A. Monick, Mkohols, Their Chemist, Properties and Manufacture, Reinhold Book Corp., New York, 1968. 

Handbooks pubHshed by Caustic Soda SuppHers, The Chlorine Institute, Washington, D.C., and The Manufacturing Chemists Assn., 1989. 

MCA Chemical Manufacturers Association (was Manufacturing Chemists NIOSH... 

The flavor chemist is responsible for the basic knowledge of sensory and appHcation properties of each of this large number of raw materials the large number of possible combinations of these items to produce specifically flavored finished compounds is readily apparent. It is not uncommon to develop a flavor that combines essential oils, plant extractive, fmit juices, and synthetics. The choice of materials depends on type of product, conditions of manufacture, labeling, and intended use. 

B. F. Szuhaj, ed., Eecithins Sources, Manufacture and Eses, American Oil Chemist s Society, Champaign, lU., 1989. 

In 1961, chemists (19) isolated a minor component of geranium oil, characterized it as rose oxide (1), and reported that this compound contributed to the characteristic geranium odor. Rose oxide (1) is manufactured by the photooxidation of citroneUol (8). 

Although phosphine [7803-51-2] was discovered over 200 years ago ia 1783 by the French chemist Gingembre, derivatives of this toxic and pyrophoric gas were not manufactured on an industrial scale until the mid- to late 1970s. Commercial production was only possible after the development of practical, economic processes for phosphine manufacture which were patented in 1961 (1) and 1962 (2). This article describes both of these processes briefly but more focus is given to the preparation of a number of novel phosphine derivatives used in a wide variety of important commercial appHcations, for example, as flame retardants (qv), flotation collectors, biocides, solvent extraction reagents, phase-transfer catalysts, and uv photoinitiators. 

Siting and Construction of New Control Houses for Chemical Manufacturing Plants, Safety Guide SG-22, Chemical Manufacturers Association (Manufacturing Chemists Association), Washington, D.C., 1978. 

J. C. BuzzeU, Jr. and co-workers. Behavior of Organic Chemicals in the Mquatic Environment, Part III—Behavior in Merobic Treatment Systems (Activated Sludge), Association of Manufacturing Chemists, Washington, D.C., 1969, pp. 26—31. 

Properties and Essential Information for Safe Handling and Use of Sulfur, Chemical Safety Data Sheet SD-74, Manufacturing Chemists Association (CMA), 1959. 

Fractional vacuum distillation is the method used to separate terpene mixtures into their components. The terpene chemist usually has in the laboratory a range of columns with differing numbers of theoretical stages. Experimental distillation in the laboratory is useful in providing data for manufacturing plants that produce commercial quantities of terpene products. 

Tables 16 and 17 Hst tke analytical test methods for different properties of interest. The Manufacturing Chemists Association, Inc. (MCA) has pubUshed the Chemical Safety Data Sheet SD 63, which describes in detail procedures for safe handling of use of toluene (46). The Interstate Commerce Commission classifies toluene as a flammable Hquid. Accordingly, it must be packaged in authorized containers, and shipping must comply with ICC regulations. Properties related to safe handling are autoignition temperature, 536°C explosive limits, 1.27—7.0 vol % in air and flash point 4.4°C, closed cup.

B. J. ZwoHnski and co-workers. Catalog of Selected Ultraviolet Spectral Data, Serial No. 100, Manufacturing Chemists Association Research Project, Texas A M University, College Station, Tex., 1965. 

Phthalocyanines. Phthalocyanine is the only novel chromogen of commercial importance discovered siace the nineteenth century. It was discovered accidendy ia 1928, when duriag the routine manufacture of phthalimide from phthaUc anhydride and ammonia it was found that the product contained a blue contaminant. Chemists of Scottish Dyes Ltd, now part of Zeneca, carried out an iadependent synthesis of the blue material by passiag ammonia gas iato molten phthaUc anhydride containing iron filings. The importance of the colorant was realized (it was iatensely colored and very stable), and a patent appHcation was filed ia the same year. 

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