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Topic: Cyanates


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  Cyanic acid and cyanates - LoveToKnow 1911
Caustic alkalis hydrolyse it readily to the alkaline chloride and cyanate.
Potassium cyanate may be prepared by heating potassium cyanide with an oxidizing agent, or by heating potassium ferrocyanide with manganese dioxide, potassium carbonate or potassium dichromate (J. v.
43) by distilling a mixture of potassium ethyl sulphate and potassium cyanate.
www.1911encyclopedia.org /Cyanic_acid_and_cyanates   (649 words)

  
 Novolak cyanate blends - Patent 6437057
Blends of novolaks and cyanates, such blends can be thermally hardened in a short time and without using a catalyst and have an excellent storage stability.
Cyanates of the general formula II are generally prepared by reacting the corresponding oligomeric phenols with cyanogen chloride in the presence of a tertiary amine on the industrial scale and are likewise available in various grades and with various properties.
In the blend of the invention, the cyanate fraction of the combined amount of cyanate (II) and novolak (I) is judiciously from 10 to 90% by weight and the novolak fraction judiciously from 90 to 10% by weight, corresponding to a weight ratio cyanate:novolak of 10:90 to 90:10.
www.freepatentsonline.com /6437057.html   (1046 words)

  
 Novolak cyanate-based prepolymer compositions - Patent 7030204
The prepolymer composition of claim 3, wherein the average value of n in the novolak cyanates (Ib) is from 1 to 10.
The novolak cyanates can be polymerized thermally, optionally in the presence of catalysts, to form polytriazines, with three cyanate groups in each case undergoing cyclotrimerization to form a 1,3,5-triazine ring.
Owing to the outstanding thermal, mechanical, and electrical properties of polytriazines, novolak cyanates are being used to an increasing extent, alone or in a mixture with other cyanates, for producing high-temperature-resistant moldings.
www.freepatentsonline.com /7030204.html   (1670 words)

  
 Spartanburg SC | GoUpstate.com | Spartanburg Herald-Journal   (Site not responding. Last check: )
The cyanate ion is an anion consisting of one oxygen atom, one carbon atom, and one nitrogen atom, [1]
Cyanates are salts or esters of cyanic acid, for example potassium cyanate (KNCO) or methyl cyanate.
The cyanate ion is relatively non-toxic in comparison with cyanides.
www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=cyanate   (216 words)

  
 cyanates, potassium cyanate and sodium cyanate manufacturer, exporters, provider in india
It has today, established its position as the major sodium cyanate and potassium cyanate provider in bulk to various herbicide and dye-intermediates manufacturing units in India.
Exotic Associates is exporters of sodium cyanate, potassium cyanate and different grades of cyanates in volumes to cater to the demands of its customers in india and around the world.
As a leading manufacturer of sodium cyanate and potassium cyanate from India, Exotic Associates is ready to fulfill your cyanates requirements in different qualities, and in small or bulk quantities.
www.cyanate.net   (272 words)

  
 Cyanates - Search Results - MSN Encarta
Cyanates, salts or esters of cyanic acid (fulminic acid), a volatile, poisonous, explosive liquid with the structure H-O-NC.
cyanate ion is an ambident nucleophile in nucleophilic substitution because it can react to form an alkyl cyanate R-OCN (exception) or an alkyl isocyanate R-NCO (rule).
The main article for this category is Cyanate.
uk.encarta.msn.com /Cyanates.html   (172 words)

  
 The World Market for Fulminates, Cyanates, and Thiocyanates: A 2007 Global Trade
The total level of imports and exports on a worldwide basis, and those for each region, is based on a model which aggregates across over 150 key country markets and projects these to the current year.
Combined, Chapters 3 and 4 present the complete picture for imports and exports of fulminates, cyanates, and thiocyanates to and from all major countries in the world.
Fulminates, Cyanates, and Thiocyanates as a category is defined in this report following the definition given by the United Nations Statistics Division Classification Registry using the Standard International Trade Classification, Revision 3 (SITC, Rev. 3).
www.mindbranch.com /Fulminates-Cyanates-Thiocyanates-R307-23259   (729 words)

  
 Cyanate Esters: new high performance resins from Lonza
Cyanate esters are a class of high performance resins for use in advanced electronic, aerospace and industrial applications.
Cyanates are a class of resins whose common feature is the cyanate ester group on an aromatic ring, which will polymerize to very stable triazine structures under heat and/or catalysis.
Generally-speaking, cyanates are easier to process than competing resin systems and they allow operating temperatures of up to 400º C, improve impact strength and permit higher clock frequencies of electronic components due to excellent dielectric properties.
www.lonza.com /group/en/company/news/archive/1999/cyanate.html   (454 words)

  
 Reference.com/Encyclopedia/Cyanate
The cyanate ion is an anion consisting of one oxygen atom, one carbon atom, and one nitrogen atom, [OCN]
Cyanates are salts or esters of cyanic acid, for example potassium cyanate (KNCO) or methyl cyanate.
The cyanate ion is relatively non-toxic in comparison with cyanides.
www.reference.com /browse/wiki/Cyanate   (253 words)

  
 VARTM / RTM
Cyanates are well known for their database in space and low dielectrics for radomes, but not as well known as a converter for epoxies.
Cyanates will react directly with the epoxy ring to form a 5 membered oxazolidone ring along with some cyanate/cyanate to form a triazine.
The anhydride and cyanates are catalytically controlled and catalyst choice dictates cure rate and latency.
www.appliedpoleramic.com /VRESIN.htm   (979 words)

  
 MEDLINE Search on Medscape.com
Biodegradation of cyanides, cyanates and thiocyanates to ammonia and carbon dioxide by immobilized cells of Pseudomonas putida.
Immobilized cells of P. putida degraded cyanides, cyanates and thiocyanates to NH3 and CO2.
Cyanates, thiocyanates, and cyanamides are all competent dipolarophiles for this...
search.medscape.com /medline-search?queryText=Cyanates   (271 words)

  
 CYANIC ACID AND CYANATES - Online Information article about CYANIC ACID AND CYANATES
The salts of cyanic acid are known as the cyanates, the two most important being See also:
Esters of normal cyanic acid are not known, but those of isocyanic acid (HN•CO) may be prepared by the action of alkyl halides on See also:
43) by distilling a mixture of potassium ethyl sulphate.and potassium cyanate.
encyclopedia.jrank.org /CRE_DAH/CYANIC_ACID_AND_CYANATES.html   (801 words)

  
 cyanates, potassium cyanate and sodium cyanate manufacturer, exporters, provider in india   (Site not responding. Last check: )
It has today, established its position as the major sodium cyanate and potassium cyanate provider in bulk to various herbicide and dye-intermediates manufacturing units in India.
Exotic Associates is exporters of sodium cyanate, potassium cyanate and different grades of cyanates in volumes to cater to the demands of its customers in india and around the world.
As a leading manufacturer of sodium cyanate and potassium cyanate from India, Exotic Associates is ready to fulfill your cyanates requirements in different qualities, and in small or bulk quantities.
www.cyanate.net /index.htm   (272 words)

  
 Liquid Nitriding
The cyanide content of the fused salt is maintained in the range of 45 to 50% calculated as potassium cyanide, and the cyanate content is maintained in the range of 42 to 50% calculated as potassium cyanate.
Makeup salt consists of a precise mixture of sodium and potassium cyanides that are oxidized by aeration to the mixed cyanate.
Aging is defined as the oxidation of the cyanide to cyanate.
www.key-to-steel.com /Articles/Art135.htm   (2080 words)

  
 Cyanate at AllExperts
In organic compounds the cyanate group is a functional group.
The cyanate ion is an ambident nucleophile in nucleophilic substitution because it can react to form an alkyl cyanate R-OCN (exception) or an alkyl isocyanate R-NCO (rule).
Cyanates are salts of cyanic acid for example potassium cyanate (KNCO).
en.allexperts.com /e/c/cy/cyanate.htm   (206 words)

  
 6852. Cyanide destruction
However cyanate is also toxic (not as much, but still), but I read that you can transform them into NH3 and CO2 by adding a strong inorganic acid to cyanates (bringing to pH =2).
However, my concern is that I'm afraid that by adding acid to the solution, the cyanate will be transformed back into cyanides and will produce HCN (something that we don`t really want to happen).
Once the cyanide has been converted to cyanate this way, it cannot be reconverted to cyanide.
www.finishing.com /68/52.shtml   (782 words)

  
 Baikal Watch:
The WAD method, for example, fails to detect cyanates, thiocyanates, cyanogen chloride, chloramines, most cyanogen, and most organo-cyanide compounds, most gold, platinum, and cobalt complexes, and most importantly, iron cyanide complexes.
The total cyanide method fails to detect cyanates, thiocyanates, chloramines, most organic-cyanide compounds, and most cobalt and platinum cyanide complexes.
If one wishes to determine, for example, the concentration of cyanates and/or thiocyanates, analyses specific for these parameters must be requested from the laboratory.
www.earthisland.org /project/reportPage2.cfm?reportContentID=51&subSiteID=1&pageID=101   (457 words)

  
 APPENDIX IX: GLOSSARY OF TERMS
Condition caused by intake of toxic (i.e., excess) amounts of a vitamin.
Concerning chemical componds which do not contain carbon as the principal element (excepting carbonates, cyanides and cyanates).
The physical and chemical processes by which feedstuffs are synthesized into complex elements (anabolism), complex substances are transformed into simple ones (catabolism), and energy is made available for use by an organism.
www.fao.org /docrep/S4314E/s4314e0o.htm   (639 words)

  
 CYANATES
Source: compiled by the editor from various references; see credits.
The World Market for Fulminates, Cyanates, and Thiocyanates: A 2004 Global Trade Perspective (reference)
The Chemistry of Cyanates and Their Thio Derivatives (reference)
www.websters-online-dictionary.org /definition/english/Cy/Cyanates.html   (208 words)

  
 Alkali Cyanates:Sodium Cyanate (NaCNO) and Potassium Cyanate (KCNO) - Recent Laboratories
The roots of Recent Laboratories stretch back to 1975, when the company started with inorganic chemicals and developed an indigenous technology to manufacture Alkali Cyanates.
At present, Recent Laboratories is the leading manufacturer of Alkali Cyanates in India.
After working in different fields of chemical industry like, Agrochemical, Dyes and Intermediates and also the Automobile industry in India, Recent Laboratories would like to present a whole new facet of its business opportunity to the world.
www.recentlab.com /AboutUs.htm   (131 words)

  
 cyanates - OneLook Dictionary Search   (Site not responding. Last check: )
We found 3 dictionaries with English definitions that include the word cyanates:
Tip: Click on the first link on a line below to go directly to a page where "cyanates" is defined.
Phrases that include cyanates: cyanic acid and cyanates
www.onelook.com /?w=cyanates   (84 words)

  
 CYANIC ACID ESTERS FROM PHENOLS: PHENYL CYANATE
The desiccation must be done carefully since water is soluble in the product in the presence of phenol and may cause trimerization of the cyanate to a 1,3,5-triazine derivative.
The spectral properties of phenyl cyanate are as follows.
The cyanates also undergo 1,3- and 1,4-dipolar cycloadditions involving the cyano group to give substituted azoles and azines.
www.orgsyn.org /orgsyn/orgsyn/prepcontent.asp?print=1&showprint=1&prep=cv7p0435   (731 words)

  
 ChemTeam: Wohler on Urea
One would have been able to reckon beforehand that ammonium cyanate with 1 atom of water has the same composition as urea, without having discovered by experiment the formation of urea from cyanic acid and ammonia.
By the combustion of cyanic acid with copper oxide one obtains 2 volumes of carbon dioxide and 1 volume of nitrogen, but by the combustion of ammonium cyanate one must obtain equal volumes of these gases, which proportion also holds for urea, as Prout found.
I refrain from the considerations which so naturally offer themselves as a consequence of these facts, e.g., with respect to the composition proportions of organic substances, and the similar elementary and quantitative composition of compounds of very different properties, as for example fulminic acid and cyanic acid, a liquid hydrocarbon and olefiant gas (ethylene).
dbhs.wvusd.k12.ca.us /webdocs/Chem-History/Wohler-article.html   (396 words)

  
 Sciencemadness Discussion Board
The Kirk Othmer Encyclopedia mentions that cyanides rapidly oxidize to cyanates when heated in the presence of air and iron(!) So why would the instructions say to use a steel vessel and not mention any measures to isolate from the air...
Potassium cyanate is the salt of cyanic acid.
I then added the 5 grams of charcoal (somewhat in excess of what is theoretically needed to reduce cyanate to cyanide) and increased the heat by placing the burner closer to the vessel.
www.sciencemadness.org /talk/viewthread.php?tid=23   (6400 words)

  
 Amazon.com: CYANATES: Books   (Site not responding. Last check: )
A study of the use of the dicyanatodipyridine copper (II) complex for the determination of cyanate by Jean McClelland (Unknown Binding - 1950)
Linkage isomerism in the cyanate anion by Matthew Stanley Johnson (Unknown Binding - 1989)
Combustibility of cyanate ester resins by Richard E Lyon (Unknown Binding - 2002)
www.amazon.com /s?ie=UTF8&keywords=CYANATES&index=books&page=1   (899 words)

  
 Cyanates   (Site not responding. Last check: )
The cyanate ion is an anion consisting of one oxygen atom, one carbon atom, and one nitrogen atom (OCN
Cyanates are salts of cyanic acid for example potassium cyanate (KNCO).
In the changing world of cyanates and related topics, we keep bringing you all the updated cyanates info you will need - Visit us today.
www.guideofpills.com /Cyanates.html   (341 words)

  
 Summary: Playas
The sediment load carried into a playa from streams or blown in by wind characteristically includes clay, silt, and fine-grained sand.
The evaporites, which come from runoff as well as from ground water, commonly contain chlorides, sulfates, nitrates, carbonates, borates, or other salts, including toxic ones such as cyanates or arsenates.
Evaporation of water from playas leaves exposed surfaces of the resident material, which can be any mix of clay, silt, fine sand, and salt.
www.tec.army.mil /research/products/desert_guide/lsmsheet/lsplaya.htm   (1026 words)

  
 Amazon.com: "aryl cyanates": Key Phrase page   (Site not responding. Last check: )
that have been prepared by the alcohol-cyanogen halide method are aryl cyanates, alkyl cyanates and fluoroalkyl cyanates.
The aryl cyanate monomers overwhelmingly predominate, and only they have achieved commercial importance.
, for a cyanide group, using cyano halides, cyanogen, or aryl cyanates, is described mainly in the patent literature.
amazon.com /phrase/aryl-cyanates   (323 words)

  
 Wöhler
This was generally interpreted by his successors as a major blow to the philosophy of vitalism, which maintained that there was an impassable gulf separating the inorganic compounds found in rock and minerals from the organic compounds found in living organisms.
Though he is best remembered for his work in organic chemistry — the urea synthesis and his cooperative studies with Liebig on both the isomerism of the cyanates and fulminates and the chemistry of the benzoyl radical — much of Wöhler’s research actually dealt with inorganic chemistry.
Though these two famous chemists eventually had a falling out, Wöhler managed to remain friends with both of them to the end, and the published volumes of their collected letters give us a valuable insight into their respective personalities.
www.bioanalytical.com /info/calendar/98/08wohl.htm   (361 words)

  
 Chemistry International -- Newsmagazine for IUPAC
This volume presents solubility data of azides, cyanides, cyanates, and thiocyanates of alkali metals, alkaline earth metals, and ammonium.
No solubility data have been found for some of the compounds of alkali metals, alkaline metals, and ammonium.
These include beryllium and magnesium azides, lithium, rubidium cesium, ammonium, and alkaline earth cyanates and cyanides, and beryllium thiocyanate.
www.ibiblio.org /pub/academic/chemistry/iupac/Download/publications/ci/2004/2603/bw3_hala.html   (146 words)

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