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Topic: Raschig process

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In the News (Fri 25 May 18)

  Raschig process - Wikipedia, the free encyclopedia
The Raschig process is a chemical process for producing hydroxylamine (used for making caprolactam for nylon manufacture).
The process converts ammonium carbonate to ammonium nitrite, and this is converted to hydroxylamine disulfonate and thence to hydroxylamine sulfate.
Hydrazine is produced in the Olin Raschig process.
en.wikipedia.org /wiki/Raschig_process   (99 words)

 Process for preparing hydrazines - Patent 4013758
A process according to claim 1 wherein R is hydrogen and R' is phenyl.
A process according to claim 1 wherein said amide is selected from the group consisting of potassium amide, lithium amide and sodamide.
In the Bergbau or Bayer processes, ammonia is reacted with chlorine in the presence of a ketone to form an intermediate diazocyclopropane or ketazine.
www.freepatentsonline.com /4013758.html   (4622 words)

 Category:Industrial processes -   (Site not responding. Last check: 2007-10-30)
An industrial process is a procedure that alters materials or substances (grinding, welding, heat treatment, etc).
Some processes make the production of a rare material vastly cheaper, thus changing it into a commodity; i.e.
the process makes it economically feasible for society to use the material on a large scale.
en.wikipedia.christams-ornament.com /wiki/Category:Industrial_processes   (1008 words)

 Method for preparing hydrazine hydrate - Patent 6482383
The process according to claim 1, wherein the reactor used in the stage (d) is a distillation column.
The Bayer process is an alternative form of the Raschig process which consists in shifting a chemical equilibrium by trapping, using acetone, the hydrazine formed in the azine form (CH.sub.3).sub.2 C.dbd.N--N.dbd.C--(CH.sub.3).sub.2.
The process with hydrogen peroxide consists in oxidizing a mixture of ammonia and a ketone with hydrogen peroxide in the presence of a means for activating the hydrogen peroxide in order to directly form the azine, which it is sufficient subsequently to hydrolyse to hydrazine hydrate.
www.freepatentsonline.com /6482383.html   (3404 words)

 YourArt.com >> Encyclopedia >> Hydrazine   (Site not responding. Last check: 2007-10-30)
Hydrazine is produced in the Olin Raschig process from sodium hypochlorite and ammonia, a process developed in 1907.
Acetone and ammonia first react to give the imine followed by oxidation with hydrogen peroxide to the oxaziridine, a three-membered ring containing carbon, oxygen, and nitrogen, followed by ammonolysis to the hydrazone, a process that couples two nitrogen atoms.
Hydrazine is used in many processes including: production of spandex fibers, as a polymerization catalyst, a blowing agent, in fuel cells, solder, fluxes, and photographic developers, as a chain extender in urethane polymerizations, and heat stabilizers.
www.yourart.com /research/encyclopedia.cgi?subject=/Hydrazine   (1077 words)

 Manufacturing Process
Raschig process - The Raschig process is a chemical process for producing hydroxylamine (used for making caprolactam for nylon manufacture).
Processing - Typically, processing describes the act of taking something through an established and usually routine set of procedures to convert it from one form to another, as a manufacturing procedure, such as processing milk into cheese.
The book carefully presents the fundamentals of materials processing along with their relevant applications, so that the reader can clearly assess the capabilities, limitations, manufacturing process and potentials of manufacturing processes manufacturing process and their competitive aspects.
www.venture-beyond.com /manufacturingprocess.html   (482 words)

 Process Economics Report 22: Phenol
Three new processes for making phenol: one from set-butylbenzene, one from benzene by direct oxidation in the gas phase (based on Gulf Oil Company patents), and one via phenyl acetate are included for evaluation.
Five processes evaluated in PEP Report No. 22 (the toluene process, the Raschig process, the sulfonation process, the chlorination process, and the cyclohexane process) are briefly reviewed with respect to new developments.
The cost features of these processes are revised as a result of introducing some minor modifications of the processes, using improved estimation techniques, and adjusting to the present-day cost index.
www.sriconsulting.com /PEP/Public/Reports/Phase_VII/RP022A   (198 words)

 Cumene process Information Center - cumene production process
This process illustrates the benefit of chemical engineering in merely converting two relatively cheap starting materials, benzene and propene into two more valuable ones, phenol and acetone.
Benzene and propene cumene production process are compressed together to a pressure of 30 standard atmospheres at 250°C (482°F) in presence of a catalytic Lewis acid.
Researches sugguest the loss of water molecule and phenyl migration may take place simultaneously, in other words the step of the mechanism is concerted.
www.scipeeps.com /Sci-Chemistry_Topics_Co_-_D/Cumene_process.html   (288 words)

 Phenol   (Site not responding. Last check: 2007-10-30)
Notwithstanding the effects of concentrated solutions, it is also used in cosmetic surgery as an exfoliant, to remove layers of dead skin.
Phenol is the first starting material in the industrially used three-step process to produce aspirin.
John H. Kellogg, the brother of Will Keith Kellogg who founded the Kellogg Company, advocated the application of "pure carbolic acid [phenol] on the clitoris of females to prevent masturbation in children".
www.keywordmage.net /ph/phenol.html   (310 words)

 Hydrazine - Free net encyclopedia   (Site not responding. Last check: 2007-10-30)
It can be made by oxidizing ammonia with sodium hypochlorite (the Raschig process).
Hydrazine is produced in the Raschig process from sodium hypochlorite and ammonia, a process developed in 1907.
Hydrazine derivatives 1,1-dimethylhydrazine and 1,2-dimethylhydrazine, in which two of the hydrogen atoms are substituted with methyl groups, are also described as hydrazines.
www.netipedia.com /index.php/Hydrazine   (853 words)

 r-Project Report-Nar-c   (Site not responding. Last check: 2007-10-30)
The presence of actinide solution in process equipment in certain facilities creates an increasing safety risk due to the age and condition of the process equipment.
Raschig rings and sludge from 51 Raschig ring mixed residue tanks in B371.· Remove Raschig rings and sludge from 22 Raschig ring mixed residue tanks in B776/777.· Remove
process will be further treated through the bottle box to form approximately 120 55-gallon drums of cemented waste solutions to be stored as TRU waste for shipment to WIPP.
web.em.doe.gov /pbs/n_228p2.html   (752 words)

 Saint-Gobain NorPro - About Us
The Process Ceramics business unit of Saint-Gobain NorPro encompasses the organization's worldwide activities in mass transfer, heat transfer and support media products for the chemical, petrochemical, and environmental markets.
Without the proper expertise, manufacturing capabilities, and quality focus, the failure rate of ceramics would be unacceptably high for critical processes such as those found in our end-markets.
The Process Ceramics Group of Saint-Gobain NorPro possesses the requisite expertise in the critical areas of material selection, design and manufacturing a combination of skills which is unique in the industry.
www.norpro.saint-gobain.com /data/aboutus/About_Us.asp?SEQ=300   (209 words)

 IngentaConnect Interaction between substituted chloramines and liquid ammonia us...   (Site not responding. Last check: 2007-10-30)
Interaction between substituted chloramines and liquid ammonia using the indirect Raschig process
In this paper, different hydrazines are synthesised by the indirect Raschig process.
Chloramine reacts immediately with the substituted amine, in agreement with the direct Raschig process, to produce the hydrazine.
www.ingentaconnect.com /content/stl/jcr/2005/00002005/00000012/art00018   (218 words)

 rq501-PBS_Report   (Site not responding. Last check: 2007-10-30)
Filtrate from CWTS processing will be further treated in Building 374 as part of the Waste Management
As stated previously, the Liquid Stabilization Project is comprised of liquid removal, liquid processing, hydrogen mitigation, and mixed residue RCRA
The processes used for the Liquid Stabilization Project are based on existing processes and proven technologies.
web.em.doe.gov /closure/pbs/rfp187.html   (547 words)

 Chemical Engineering Journal.   (Site not responding. Last check: 2007-10-30)
Anabela Leitão, Alírio Rodrigues, Adsorptive processes using "large-pore" materials: analysis of a criterion for equivalence of diffusion-convection, "apparent" diffusion and "extended" linear driving force models, Chemical Engineering Journal 60 (1-3) (1995) pp.
Anabela Leitão, Alírio Rodrigues, Catalytic processes using "large-pore" materials: effects of the flow rate and operating temperature on the conversion in a plug-flow reactor for irreversible first-order reactions, Chemical Engineering Journal 60 (1-3) (1995) pp.
Xiaobing Feng, Jae Sung Lee, Jun Won Lee, Jeong Yong Lee, Di Wei, G.L. Haller, Effect of pore size of mesoporous molecular sieves (MCM-41) on Al stability and acidity, Chemical Engineering Journal 64 (2) (1996) pp.
elsevier.com /cdweb/journals/09230467/viewer.htt?viewtype=keywords&...   (721 words)

 Pumping Caprolactam
This program included, for example, the installation of various new plants for producig caprolactam feedstock and side products such as cyclohexanone, hydroxylammonium sulphate, as well as the extension and modernization of the phenol plant.
After changing the Raschig process previously used to produce hydroxylammonium sulphate over to selective NO hydrogenation, the company encountered unexpected problems.
Owing to the change in hydroxylammonium sulphate production - this in the inorganic feedstock for caprolactam synthesis - a diluted nitric acid is produced which results in substantial amounts of dissolved NO and NO gases.
www.cheresources.com /capropump.shtml   (1022 words)

 Patents 5250267 - 5250519
Patent 5250281: Process for manufacturing a voltage non-linear resistor and a zinc oxide material to be used therefor
Patent 5250352: Process for the preparation of a dental prosthesis and the prosthesis produced by said process
Patent 5250418: Process and reagent for determining the activity of chymotrypsin and trypsin in feces
www.everypatent.com /idx/pdir984.html   (9602 words)

 Gas Plant
Amine Guard FS Process Tech Sheet (PDF 261KB)
Raschig Super-Ring a New Fourth Generation (PDF 375KB)
Adobe® Reader® is required to view or print these files.
www.uop.com /gasprocessing/6070.html   (45 words)

 Patents 5593642 - 5593897
Patent 5593724: Process for producing a pattern in a glaze composition and preparation of mold therefore
Patent 5593736: Process for manufacturing a fiber reinforced optic microcable with a UV cured resin
Patent 5593871: Process for the preparation of enantiometric 2-alkanoic acid amides from nitriles
www.everypatent.com /idx/pdir1781.html   (9696 words)

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