Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Report introduction

EXAMPLE CONTENTS FOR SUPPLIER AUDIT REPORT Introduction... [Pg.177]

Topical azithromycin 1.5% (Astern) is currently undergoing testing for bacterial conjunctivitis with good results reported. Introduction to the United States is expected by the fourth quarter of 2007. [Pg.449]

Berre A (2002) IDEAS project report, Introduction to ebXML and web services... [Pg.160]

Thia-Claisen rearrangements of N-benzylpyrrolidine-2-thione and chiral allylic bromides derived from D-mannitol have been reported. Introduction of a bromine atom 0 onto the double bond of the allyhc bromide reverses the sense of diastereoselectivity in the [3,3]-sigmatropic rearrangement and DFT calculations rationalize the selectivity in terms of a Cieplak effect (Scheme 34). [Pg.532]

Internal Report Introduction to PC-CAMAS, modeling and simulation" Available on request Control Lab, Faculty of Electrical Engineering, University Twente, POB 217, 7500AE Enschede, Netherlands... [Pg.83]

The present study also reports introduction of the significant catalytic activity to the pitch-based ACF (S.A.2000m2/g) after the CVD treatment by pyridine. The activity observed in the present study allowed the complete removal of lOOOppm SO2 at room temperature by W/F of 2.5x10" g min ml-i. The ACF modified by pyridine showed higher catalytic activity than the ACF modified by benzene, even though the same amount of carbon was deposited. Pyridine provided at 725°C basic functionality on the surface. Thus, catalytic SOx removal is very much enhanced. [Pg.70]

The propylene-based process developed by Sohio was able to displace all other commercial production technologies because of its substantial advantage in overall production costs, primarily due to lower raw material costs. Raw material costs less by-product credits account for about 60% of the total acrylonitrile production cost for a world-scale plant. The process has remained economically advantaged over other process technologies since the first commercial plant in 1960 because of the higher acrylonitrile yields resulting from the introduction of improved commercial catalysts. Reported per-pass conversions of propylene to acrylonitrile have increased from about 65% to over 80% (28,68—70). [Pg.184]

Federal regulations (40 CFR 261) classify acrylonitrile as a hazardous waste and it is Hsted as Hazardous Waste Number U009. Disposal must be in accordance with federal (40 CFR 262, 263, 264), state, and local regulations only at properly permitted faciUties. It is Hsted as a toxic pollutant (40 CFR 122.21) and introduction into process streams, storm water, or waste water systems is in violation of federal law. Strict guidelines exist for clean-up and notification of leaks and spills. Federal notification regulations require that spills or leaks in excess of 100 lb (45.5 kg) be reported to the National Response Center. Substantial criminal and civil penalties can result from failure to report such discharges into the environment. [Pg.185]

Within the scope of the original definition, a very wide variety of ionomers can be obtained by the introduction of acidic groups at molar concentrations below 10% into the important addition polymer families, followed by partial neutralization with metal cations or amines. Extensive studies have been reported, and useful reviews of the polymers have appeared (3—8). Despite the broad scope of the field and the unusual property combinations obtainable, commercial exploitation has been confined mainly to the original family based on ethylene copolymers. The reasons for this situation have been discussed (9). Within certain industries, such as flexible packaging, the word ionomer is understood to mean a copolymer of ethylene with methacrylic or acryhc acid, partly neutralized with sodium or zinc. [Pg.404]

Since muscone (101), by itself, does not reproduce the total odor impression of this musk, IFF chemists (56) as early as 1971 in an analysis of tincture of Tonquin musk, reported a series of macrocycHc ketones (Table 16) which play a key role in creating the characteristic odor of this musk (11). The introduction of a double bond into a macrocycHc ketone (eg, 102) changes the odor from flowery musk to animal musk. [Pg.315]

Alkylation a.ndAryla.tion, The direct introduction of carbon—carbon bonds in quinoline rings takes place in low yield and with Htde selectivity. The most promising report involves carboxyHc acids with ammonium persulfate and silver nitrate (31). [Pg.390]

The thermal decomposition of silanes in the presence of hydrogen into siUcon for production of ultrapure, semiconductor-grade siUcon has become an important art, known as the Siemens process (13). A variety of process parameters, which usually include the introduction of hydrogen, have been studied. Silane can be used to deposit siUcon at temperatures below 1000°C (14). Dichlorosilane deposits siUcon at 1000—1150°C (15,16). Ttichlorosilane has been reported as a source for siUcon deposition at >1150° C (17). Tribromosilane is ordinarily a source for siUcon deposition at 600—800°C (18). Thin-film deposition of siUcon metal from silane and disilane takes place at temperatures as low as 640°C, but results in amorphous hydrogenated siUcon (19). [Pg.22]

Decorative eye cosmetic products have been reported to be subject to pathogenic microbial contamination. Regulatory agencies in several countries, therefore, permit the use of mercury-containing preservatives in eye makeups. The infections reported were to a large extent caused by contamination during use, and the introduction of self-sterilising preparations seems warranted. [Pg.291]

The Toxic Substances Control Act (TSCA) was enacted in 1976 to identify and control toxic chemical ha2ards to human health and the environment. One of the main provisions of TSCA was to estabUsh and maintain an inventory of all chemicals in commerce in the United States for the purpose of regulating any of the chemicals that might pose an unreasonable risk to human health or the environment. An initial inventory of chemicals was estabhshed by requiring companies to report to the United States Environmental Protection Agency (USEPA) all substances that were imported, manufactured, processed, distributed, or disposed of in the United States. Over 50,000 chemical substances were reported. PoUowing this initial inventory, introduction of all new chemical substances requires a Premanufacturing Notification (PMN) process. To be included in the PMN are the identity of the new chemical, the estimated first year and maximum production volume, manufacture and process information, a description of proposed use, potential release to the environment, possible human exposure to the new substance, and any health or environmental test data available at the time of submission. In the 10 years that TSCA has been in effect, the USEPA has received over 10,000 PMNs and up to 10% of the submissions each year are for dyes (382)... [Pg.388]


See other pages where Report introduction is mentioned: [Pg.70]    [Pg.299]    [Pg.226]    [Pg.331]    [Pg.17]    [Pg.226]    [Pg.258]    [Pg.188]    [Pg.23]    [Pg.8]    [Pg.407]    [Pg.70]    [Pg.299]    [Pg.226]    [Pg.331]    [Pg.17]    [Pg.226]    [Pg.258]    [Pg.188]    [Pg.23]    [Pg.8]    [Pg.407]    [Pg.1041]    [Pg.197]    [Pg.597]    [Pg.598]    [Pg.547]    [Pg.564]    [Pg.46]    [Pg.20]    [Pg.245]    [Pg.408]    [Pg.241]    [Pg.519]    [Pg.468]    [Pg.303]    [Pg.331]    [Pg.537]    [Pg.430]    [Pg.87]    [Pg.99]    [Pg.202]    [Pg.91]    [Pg.387]    [Pg.451]    [Pg.290]    [Pg.255]   
See also in sourсe #XX -- [ Pg.299 ]




SEARCH



© 2024 chempedia.info