chlorinated paraffins formation of sulphur containing

Chlorinated paraffins: formation of sulphur-containing …

(1986). Chlorinated paraffins: formation of sulphur-containing metabolites of polychlorohexadecane in rats. Xenobiotica: Vol. 16, No. 3, pp. 225-232.,Chlorinated paraffins: formation of sulphur-containing … ,A uniformly 14C-labelled polychlorinated hexadecane (14C-PCHD; 65% chlorine by wt) was injected into the portal vein in bile duct-cannulated rats (5-6 mg/kg) and the bile was collected for two or three days.,Chlorinated paraffins: disposition of a highly chlorinated … ,Chlorinated paraffins: formation of sulphur-containing metabolites of polychlorohexadecane in rats. Ahlman M, Bergman A, Darnerud PO, Egestad B, Sjövall J.

Chlorinated Paraffins – Toxicological Risks of Selected …

Commercial chlorinated paraffins are mixtures that contain chlorinated paraffins of several carbon chain lengths with varying degrees of chlorination. Commercial chlorinated paraffins have carbon chain lengths between 10 and 38 carbon atoms and percent chlorination between 10% and 72%.,Determination of chlorinated paraffins by negative ion … ,This article is cited by 23 publications. Bo Yuan, Tomas Alsberg, Christian Bogdal, Matthew MacLeod, Urs Berger, Wei Gao, Yawei Wang, and Cynthia A.,CHLORINATED PARFINS – World Health Organization ,CHLORINATED PARS 57 Table 2. Chemical and physicalproperties of representative chlorinated paraffnsa Paraffn Average Chlorine Density Refractive Visity Pour- Heat stability feetock chain content (25 ° C, index (25°C, P) pointb (% HO afer length (%) glml) CC) 4 h at 175°C) Cio-C13 Cii 60 1.36 1.516 35-10 0.10 C13-Ci 7 Cis 52 1.25 1.510 16-10 0.10 Ci rC30 Ci4 39 1.12 1.501 7-20 0.20

Bioaccumulation of short-chain chlorinated paraffins in …

Short chain chlorinated paraffins (SCCPs) are a complex group of synthetic chlorinated n-alkanes ranging from C 10 to C 13 with chlorine content of 40–70 % by weight ( Fiedler, 2010 ). They are widely used as extreme pressure and temperature additives, flame retardants, plasticizers and lubricants since the 1930s ( Tomy et al., 1998 ).,Chlorinated Paraffins (EHC 181, 1996) ,The reaction is exothermic. At a chlorine content above approximately 54% further chlorination is slow and difficult.,E nviro nme ntal Chemistry a nd Toxicology of … – Springer ,Polychlorinated-n-alkanes (PCAs) or chlorinated paraffins consist of C 10 to C 30 n-alkanes with chlorine content from 30% to 70% by mass. PCAs are used as high-temperature lubricants, plasticizers, flame retardants, and additives in adhesives, paints, rubber, and sealants.

FACETS OF CHLORINATED PARAFFIN USED IN PVC FORMULATIONS

Commercial chlorinated paraffins are complex mixture of poly chlorinated n-alkanes, containing thousands of homologous and isomers, which are not completely separated by standard analytical methods.,Chlorinated Paraffins (EHC 181, 1996) ,The reaction is exothermic. At a chlorine content above approximately 54% further chlorination is slow and difficult.,Formation of chlorinated by-products during photo-Fenton … ,This study evaluated the formation of chlorinated transformation products during photo-Fenton treatment of pyrimethanil (PYR-20 mg L(-1)) in two water matrices, demineralised water (DW) and water containing 5 g L(-1) of NaCl (DW(NaCl)). All experiments were carried out in compound parabolic collecto …

US3567610A – Production of chlorinated paraffins – Google …

US3567610A US739177A US3567610DA US3567610A US 3567610 A US3567610 A US 3567610A US 739177 A US739177 A US 739177A US 3567610D A US3567610D A US 3567610DA US 3567610 A US3567610 A US 3567610A Authority US United States Prior art keywords reaction chlorinated chlorination weight percent Prior art date 1968-06-24 Legal status (The legal status is an assumption and is not a legal conclusion.,Formation and speciation of chlorinated, brominated, and … ,AGRICULTURAL SCIENCE AND TECHNOLOGY INFORMATION,Chlorinated paraffins – PiPiWiki ,Chlorinated paraffins (CPs) are complex mixtures of polychlorinated n-alkanes.The chlorination degree of CPs can vary between 30 and 70 wt%.CPs are subdivided according to their carbon chain length into short-chain CPs (SCCPs, C 10–13), medium-chain CPs (MCCPs, C 14–17) and long-chain CPs (LCCPs, C >17).Depending on chain length and chlorine content, CPs are colorless or yellowish liquids …

7. Possibility of Replacing the Chorinated Paraffins – CORE

The most commonly used chlorinated paraffins were with 35‐70 % of chlorine and with the hydrocarbon base with C10‐20. These studies have shown that short‐chain chlorinated paraffins have the biggest potential risk of influence on the environment especially if they are not handled properly when they become waste material.[6],Formation and control of trihalomethanes in chlorinated … ,Formation and control of trihalomethanes in chlorinated drinking waters containing fulvic acid. Technical completion report,On the chemical nature of boundary lubrication of … ,The use of S- and P-containing additives on the tested disk surfaces revealed that tribochemical reactions resulted in the formation of antiwear tribofilms containing S- and P-rich components.

Risk assessment of chlorinated paraffins in feed and food …

Chlorinated paraffins (CPs) are complex technical mixtures of polychlorinated alkanes … humic acid and sulfur-containing compounds that interfere with the final analysis.,FACETS OF CHLORINATED PARAFFIN USED IN PVC FORMULATIONS ,Commercial chlorinated paraffins are complex mixture of poly chlorinated n-alkanes, containing thousands of homologous and isomers, which are not completely separated by standard analytical methods.,CHLORINATED PARAFFINS [ASSESSMENT] – Europa ,explosives, heat sensitive colorants, azo and sulphur dyes, and in the organic synthesis of a wide variety of compounds including petrochemicals, pesticides and pharmaceuticals. However, o-toluidine seems to be the largest outlet for this substance.

Transformation pathways of chlorinated paraffins relevant …

Chlorinated paraffins (CPs, C n H 2n + 2-x Cl x) (or polychlorinated n-alkanes) have been manufactured with high production volume (> 1 million tons in 2014) and widely used as the flame retardants, plasticizers, paints, cutting fluids for metal working, sealing materials, and lubricant additives (Wei et al. 2016; Glüge et al.,Effects of Chlorinated Paraffin and ZDDP Concentrations on … ,Chlorinated EP additive, CAS RN 63449-39-8, is represented by a mixture of chlorinated hydrocarbons, mostly paraffins within C 14 –C 17. This material, chlorinated paraffin (CP), manufactured by Dover Chemical (Dover, OH), is widespread in metal forming lubricants and has 1.3 g/mL sp.,US3567610A – Production of chlorinated paraffins – Google … ,paraffin hydrocarbon are chlorinated in the presence of a minor amount of an additive capable of overcoming contamination present in the reaction zone which would otherwise retard the chlorination reaction. the additives utilized in the process are ferrocyanic acid, ferricyanic acid, and ferrocyanides or ferricyanides of ammonia group i metals, or group ii metals.

Feature – Society of Tribologists and Lubrication Engineers

Regulatory concerns have led to limiting the use of chlorinated paraffins. Non-chlorine containing boundary lubricity additives have been under evaluation as alternatives.,Chlorinated paraffins – Forum – Environmental Applications … ,Hi jkurutz,. I'm interested to detection and quantification of short chain chlorinated paraffins in leather and textile..,'Cereclor' as an Extreme Pressure Lubricant Additive 1 … ,elements chlorine, sulphur and phosphorus. 'Cereclor' chlorinated paraffins are effective extreme pressure additives.

Risk assessment of chlorinated paraffins in feed and food …

Chlorinated paraffins (CPs) are complex technical mixtures of polychlorinated alkanes … humic acid and sulfur-containing compounds that interfere with the final analysis.,Chapter 8 PETROLEUM – Pennsylvania State University ,All paraffins have the molecular formula CnH2n+2. For example, n = 8 for a compound called octane.,Frontiers | Increasing Trends of Legacy and Emerging … ,Temporal trends of industrial organic contaminants can show how environmental burdens respond to changes in production, regulation, and other anthropogenic and environmental factors. Numerous studies have documented such trends from the Northern Hemisphere, while there is very limited data in the literature from sub-Saharan Africa.

Bioaccumulation and biomagnification … – Scientific Reports

Chlorinated paraffins (CPs) are highly complex technical mixtures, and the short chain chlorinated paraffins (SCCPs) are classed as persistent and have been included in the Stockholm Convention.,Sulphur-containing additives to lubricants with antiwear … ,Sulphur-containing additives to lubricants, with anti-wear and extreme-pressure effect, comprises of asymmetric polysulphides containing a polysulphide group R-S x-, where R denotes a C 1-C 18 aliphatic radical and x varies between 2 and 10 in a vicinal position of a secondary or tertiary alcohol.,Contrasting effects of sulfur dioxide on cupric oxide and … ,Sulfur dioxide (SO2) gas has been reported to be an inhibitor of polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs) formation in fly ash. However, other research has suggested little or no inhibitory effect of SO2 gas.

研究院2020年发表论文清单-广东工业大学环境健康与污染 …

Mei Wang, Yanpeng Gao, Guiying Li, Taicheng An*. Increased adverse effects during metabolic transformation of short-chain chlorinated paraffins by cytochrome P450: A theoretical insight into 1-chlorodecane.,Understanding the tribological chemistry of chlorine … ,Model sulfur-containing additives, dimethyl and diethyl disulfide, were examined using a similar strategy where reaction proceeds by the initial formation of methyl and ethyl thiolate species, respectively, and the results are displayed in Fig. 2 [9].,Liquid Polysulfide Polymers for Chemical- and Solvent … ,Liquid polysulfide polymers are the oldest specialty elastomer. They are characterized by solvent and chemical resistance, great electrical properties, low-temperature flexibility, oxygen and ozone resistance, high impermeability to many gases and moisture, good adhesion properties, and flex-crack resistance.