67471-28-7

Usage

InChI:InChI=1/C6HCl5O/c7-1-2(8)4(10)6(12)5(11)3(1)9/h12H/i6+2

Upstream product

• 56-23-5 tetrachloromethane 
• 626-02-8 3-Iodophenol 
• 108-73-6 3,5-dihydroxyphenol 
• 64-17-5 ethanol 
• 599-52-0 2,3,4,4,5,6-hexachlorocyclohexa-2,5-dien-1-one 
• 540-38-5 p-Iodophenol 
• 118-74-1 hexachlorobenzene 
• 124-41-4 sodium methylate 
• 4024-81-1 2,3,4,4,5,5,6,6-octachloro-2-cyclohexenone 
• 7462-04-6 2,3,4,4,5,6,6-heptachloro-cyclohex-2-enone 
• 527-20-8 2,3,4,5,6-pentachloroaniline 
• 846042-42-0 2,4,6-trichloro-3-iodo-phenol 
• 107-21-1 ethylene glycol 
• 64-19-7 acetic acid 

Downstream Products

• 947-76-2 2-pentachlorophenoxy-ethanol 
• 26456-79-1 carbonic acid methyl ester-pentachlorophenyl ester 
• 21306-21-8 2,2,3,4,5,6-hexachloro-cyclohexa-2,4-dien-1-one 
• 6962-18-1 carbonic acid ethyl ester-pentachlorophenyl ester 
• 100955-38-2 nonanoic acid pentachlorophenyl ester 
• 100540-56-5 1-(2,4-dichloro-phenoxy)-2-pentachlorophenoxy-ethane 
• 99972-21-1 2-pentachlorophenoxy-butyric acid methyl ester 
• 317-32-8 fluoro-acetic acid pentachlorophenyl ester 
• 101422-38-2 butane-1,4-disulfonic acid bis-pentachlorophenyl ester 
• 859337-99-8 (5-isopropyl-2-methyl-benzyl)-pentachlorophenyl ether 
• 100526-93-0 1-pentachlorophenoxy-2-(2,4,6-trichloro-phenoxy)-ethane 
• 599-52-0 2,3,4,4,5,6-hexachlorocyclohexa-2,5-dien-1-one 
• 4024-81-1 2,3,4,4,5,5,6,6-octachloro-2-cyclohexenone 
• 7497-04-3 4-nitro-benzoic acid pentachlorophenyl ester 

Relevant academic research and scientific papers

Nano Fe3O4@ZrO2/SO42?: A highly efficient catalyst for the protection and deprotection of hydroxyl groups using HMDS under solvent-free condition

In this work, we introduce a new procedure for the protection and deprotection process of various types of alcohols and phenols by HMDS in the presence of nano magnetic sulfated zirconia (Fe3O4@ZrO2/SO42?) as a solid acid catalyst under very mild and solvent-free condition. This method has interesting advantages like short reaction times and a simple workup process. With regard to some outstanding benefits of this new heterogeneous catalyst such as excellent yield, reusability of the catalyst and easy thermal stability, high acidity, strong and excellent magnetic properties, this method can be very interesting in aspect of green chemistry Principles.

Sodium pentachlorophenol liquid product preparation method

The present invention discloses a sodium pentachlorophenol liquid product preparation method, which comprises that phenol and chlorine gas are subjected to a chlorine hydrogen substitution reaction to generate a pentachlorophenol melting liquid; the pentachlorophenol melting liquid is subjected to water breaking to form multi-gap sand-like pentachlorophenol solid; the pentachlorophenol solid and a sodium hydroxide solution are subjected to a neutralization reaction to generate a sodium pentachlorophenol crude solution; and the sodium pentachlorophenol crude solution is subjected to concentration regulation with water, and filling is performed to form the sodium pentachlorophenol liquid product. According to the present invention, the three processes such as evaporation, crystallization and centrifugation dehydration are eliminated, the electricity consumption, the natural gas consumption and the water consumption are saved, no irritating gas overflows during the operation process, the process is safe and controllable, the automation can be completely achieved, the production efficiency is significantly improved, and the production cost is significantly reduced.

Method for reducing microcontaminants during synthesis of pentachlorophenol

A method for reducing contaminants during synthesis of pentachlorophenol includes providing a phenol-based starting material and a catalyst, which form a reaction mixture. A chlorine flow is introduced so that it is in contact with the reaction mixture, and the starting material and chlorine are reacted via a temperature-programmed reaction. The chlorine flow is terminated at a predetermined temperature prior to an end of the temperature-programmed reaction and/or at a point where the yield of pentachlorophenol is less than about 95%.

Formation and destruction of chlorinated pollutants during sewage sludge incineration

The limitations facing land filling and recycling and the planned ban on sea disposal of sludge leads to the expectation that the role of sludge incineration will increase in the future. The expected increase in sludge incineration will also increase scrutiny of the main drawback to sewage sludge incineration-the formation of hazardous air pollutants (HAPs). Despite the extensive body of knowledge available on sewage sludge combustion, very few studies have been conducted on the formation of HAPs during sludge combustion. In this work, the interactions between sewage sludge pyrolysis products and sludge ash were investigated using a dual chamber flow reactor system and a horizontal laboratory scale reactor. The results of this study shows that sludge ash can catalyze oxidation and chlorination of organics. In the absence of HCl in the gas stream, sludge ash acts as an oxidizing catalyst, but in the presence of HCl, sludge ash acts as a chlorination catalyst producing high yields of organochloride compounds.

Formation of PCDDs and PCDFs during the combustion of polyvinylidene chloride and other polymers in the presence of HCl

PVDC and three non-chlorinated polymers (PP, PET, and PA) were incinerated at 700-850°C in a laboratory-scale quartz tubular furnace in the presence of HCl (ca. 500 ppm?0.8 mg/l), and the gas-phase formation of PCDD/Fs, their putative precursors and their homologue profiles were investigated. The addition of HCl had little or no apparent effect on the level of PCDD/Fs formation during PVDC combustion, and their homologue profiles were quite different from those of the three non-chlorinated polymers. With PVDC, O 8CDD and particularly O8CDF were by far most prevalent, apparently as a result of the selective formation of the precursors. With each of the three non-chlorinated polymers, combustion at 800°C or higher in the presence of HCl resulted in PCDD/Fs formation at levels equaling or exceeding those observed with PVDC. In trials made with one of them (PP) under the same conditions but using a large polymer sample (100 mg vs 20 mg in all other trials), the level of PCDD/Fs formation was far higher than with the smaller polymer samples, and thus demonstrated the importance of appropriate combustion conditions for polymer incineration.

Complex combinatorial chemical libraries encoded with tags

Encoded combinatorial chemistry is provided, where sequential synthetic schemes are recorded using organic molecules, which define choice of reactant, and stage, as the same or different bit of information. Various products can be produced in the multi-stage synthesis, such as oligomers and synthetic non-repetitive organic molecules. Conveniently, nested families of compounds can be employed as identifiers, where number and/or position of a substituent define the choice. Alternatively, detectable functionalities may be employed, such as radioisotopes, fluorescers, halogens, and the like, where presence and ratios of two different groups can be used to define stage or choice. Particularly, pluralities of identifiers may be used to provide a binary or higher code, so as to define a plurality of choices with only a few detachable tags. The particles may be screened for a characteristic of interest, particularly binding affinity, where the products may be detached from the particle or retained on the particle. The reaction history of the particles which are positive for the characteristic can be determined by the release of the tags and analysis to define the reaction history of the particle.

Novel stabilized activated derivatives of carbamic acid, their process of preparation and their use for the preparation of ureas

Process for the preparation of stable activated derivatives of carbamic acid, comprising at least one protected amino group and an activated carbamic acid function, from an amino acid derivative in which the amino group is protected. The process includes: a) a step of transformation of the —COOH group of the amino acid derivative into a —CON3 group to obtain an acyl azide; b) a step of transformation of the —CON3 group of the acyl azide into a —NCO group to obtain an isocyanate; c) a step of treating the isocyanate to obtain a stable derivative of carbamic acid.

Reactions of 2,4,6-trichlorophenol on model fly ash: Oxidation to CO and CO2, condensation to PCDD/F and conversion into related compounds

Thermal treatment of 2,4,6-trichlorophenol on a magnesium silicate-based model fly ash in the temperature range between 250°C and 400°C leads predominantly to carbon monoxide and carbon dioxide. The fraction of 2,4,6-trichlorophenol which is oxidized to CO and CO2 increases from 3% at 250°C to 75% at 400°C. Further products are polychlorinated benzenes, dibenzo-p-dioxins, dibenzofurans and phenols. The homologue and isomer patterns of the chlorobenzenes suggest chlorination in the ipso-position of the trichlorophenol. The formation of PCDD from 2,4,6-trichlorophenol and 2,3,4,6-tetrachlorophenol on municipal solid waste incinerator fly ashes and model fly ash were compared and the reaction order calculated.

Identification of surrogate compounds for the emission of PCDD/F (I-TEQ value) and evaluation of their on-line realtime detectability in flue gases of waste incineration plants by REMPI-TOFMS mass spectrometry

Correlations between products of incomplete combustion (PIC), e.g., chloroaromatic compounds, can be used to characterise the emissions from combustion processes, like municipal or hazardous waste incineration. A possible application of such relationships may be the on-line real-time monitoring of a characteristic surrogate, e.g., with Resonance-Enhanced Multiphoton Ionization-Time-of-Flight Mass Spectrometry (REMPI-TOFMS). In this paper, we report the relationships of homologues and individual congeners of chlorinated benzenes (PCBz), dibenzo-p-dioxins (PCDD), dibenzofurans (PCDF) and phenols (PCPh) to the International Toxicity Equivalent (I-TEQ) of the PCDD/F (I-TEQ value) in the flue gas and stack gas of a 22 MW hazardous waste incinerator (HWI). As the REMPI detection sensitivity is decreasing with the increase of the degree of chlorination, this study focuses on the lower chlorinated species of the compounds mentioned above. Lower chlorinated species, e.g., chlorobenzene (MCBz), 1,4-dichlorobenzene, 2,4,6-trichlorodibenzofuran or 2,4-dichlorophenol, were identified as I-TEQ surrogates in the flue gas. In contrast to the higher chlorinated phenols, the lower chlorinated phenols (degree of chlorination 4) were not reliable as surrogates in the stack gas. The identified surrogates are evaluated in terms of their detectability by REMPI-TOFMS laser mass spectrometry. The outcome is that MCBz is the best suited surrogate for (indirect) on-line measuring of the I-TEQ value in the flue gas by REMPI-TOFMS. The correlation coefficient r of the MCBz concentration to the I-TEQ in the flue gas was 0.85.

Removal of dioxins and related aromatic hydrocarbons from flue gas streams by adsorption and catalytic destruction

The dioxin removing capacity of the shell dedioxin system (SDDS a - Ti/V oxidative type catalyst) has been tested using the Umefa lab-scale incinerator over the temperature range 100 -230°C and at space velocities of 8000 and 40,000 h-1. Other analogous organic compounds, such as PCBs, PAHs, chlorobenzenes and chlorophenols have also been investigated. Results show a high degree of dioxin removal already at 100°C (82%), which occurs mainly by adsorption. When the temperature is raised a transition towards destruction is seen and at 150°C, gas hour space velocity (GHSV) 8000 and at 230°C, GHSV 40,000 virtually all removal is by destruction. High PCDD/F destruction efficiencies are reported (> 99.9%, based on I-TEQ); the other dioxin-related species and PAHs are also removed and destroyed to a significant extent. The SDDS has proved to be an effective means of destroying organic compounds in the gas phase, particularly dioxins, at temperatures as low as 150°C.