Class 540/464 - Utilizing oximes, oxime salts, hydroxylamines, hydroxylamine salts or nitrosating agents to form the hetero ring (i.e., formation of the lactam ring)

Subclass of Class 540 - Organic compounds -- part of the class 532-570 series
Definition: Processes which utilize oximes (=NOH), oxime salts
No. of patents: 22
Last issue date: 04/24/2012

Number	Title	Issue Date
8163899	Process for producing laurolactam Disclosed is a method for producing laurolactam from cyclododecanone and hydroxylamine in a simple process and with high efficiency. The method comprises the following steps (a) to (e): (a) reacting cyclododecanone with hydroxylamine in an aqueous solution in the pr...	04/24/2012
8022201	Process for preparing amides from ketoximes The present invention is directed to a process for preparing amides. In particular, the process is directed to a process performable on the industrial scale, in which a ketoxime can be converted to a cyclic or acyclic amide by means of a Beckmann rearrangement using...	09/20/2011
7893255	Process for the synthesis of lauryllactam (L12) by gas phase catalytic rearrangement of cyclododecanone oxime The present invention relates to a process for the preparation of lauryllactam in which a Beckmann rearrangement of cyclododecanone oxime is carried out. Said process is carried out in the gas phase at a temperature of between 180 and 450° C. in the presence of a m...	02/22/2011
7022844	Amide-based compounds, production, recovery, purification and uses thereof Methods are disclosed of producing and purifying at least one amide. In accordance with one of the methods disclosed herein, the at least one amide is produced by providing an organic liquid comprising at least one oxime, providing at least one catalyst, adding the ...	04/04/2006
6649757	Process for producing laurolactam from cyclododecanone Laurolactam having high quality is produced by reacting cyclododecanone with a hydroxylamine salt of a mineral acid, and converting the resultant cyclododecanoneoxime to laurolactam through the Beckmann rearrangement reaction, wherein a content of each of...	11/18/2003
6489474	Process for producing amide compound Object of the present invention is to provide a process for producing an amide compound with high efficiency by subjecting an oxime compound to Beckmann rearrangement in a liquid phase under mild reaction conditions. Namely, the invention relates to a pro...	12/03/2002
6252065	Process for the preparation of lactams from the corresponding cycloalkanone oximes For the preparation of lactams comprising 6 to 12 carbon atoms from the corresponding cycloalkanone oximes by rearrangement according to the Beckmann reaction in the presence of acid, the process is characterized in that use is made of methanesulphonic ac...	06/26/2001
6194570	Process for the preparation of lauryllactam by photonitrosation of cyclododecane and beckmann rearrangement in the presence of methanesulphonic acid A process for the preparation of lauryllactam comprises: (a) photochemically reacting cyclododecane solubilized in an organic solvent, a nitrosing agent and hydrogen chloride in the presence of an acid in order to form cyclododecanone oxime, and (b) subjecting...	02/27/2001
5712389	Polyaminated ligands and metal complexes thereof Poly(amino acid) derivatives, which are chelating agents of paramagnetic metal ions, in which at least 3 of the donor nitrogen atoms carry identical or different substituents, of formula CH (R1) --X, in which X represents CO2 Ra	01/27/1998
5571913	Process for preparing a lactam The invention relates to a process for preparing a lactam from an alicyclic ketoxime in the presence of a lactim-O-sulphonic acid and a solvent, the reaction being carried out in the presence of an acid cation exchanger. The invention relates in particula...	11/05/1996
5440032	Method for purifying organic solution containing lactams Disclosed is a method for purifying a lactam-containing organic solution which comprises processing an organic solution containing at least one lactam with an anion exchange resin to remove an anionic surface active substance contained in said organic sol...	08/08/1995
5227482	Method for producing a lactam A method for preparing a lactam, which comprises subjecting a cycloalkanone oxime to a Beckmann rearrangement reaction in a gas phase in the presence of a carrier-supported catalyst containing tantalum, wherein the carrier-supported catalyst is the one pr...	07/13/1993
5206362	Two-step method for preparing cyclic ureas Disclosed is a two-step method for the preparation of cyclic urea products which comprises: heating a diamine with urea in a mole ratio of about 1 at a temperature from about 120° C. to 140° C. until a mole of ammonia is liberated and slowly heating the...	04/27/1993
4873325	Process for the production of amides Oximes can be converted to the corresponding amides by contacting the oximes with a non-zeolitic molecular sieve, which has in its calcined form an adsorption of isobutane of at least about 2 percent by weight of the non-zeolitic molecular sieve at a part...	10/10/1989
4689412	Method for preparing lactams having 8 to 15 carbon atoms from the corresponding oximes The present invention is a process for preparing lactams having 8 to 15 carbon atoms by the Beckmann rearrangement of the corresponding oximes in a solution of an organic solvent by means of 0.5 to 10% by weight referred to the oxime of an acid derivative...	08/25/1987
4647661	Method of preparing ω-lactams, in particular caprolactam A method of preparing ω-lactams, in particular caprolactam, comprising: a step of premixing cycloaliphatic acids having the formula ##STR1## where n=3-13, with a dehydrating agent; the first step of reaction with a nitrosating agent; the second step...	03/03/1987
4349473	Process for the preparation of ω-lactams, in particular caprolactam Process for the preparation of ω-lactams (in particular caprolactam) ith improved yields, by reaction of cycloaliphatic derivatives having the general formula: ##STR1## wherein n=3-13 with nitrosating agents in the presence of dehydrating agents...	09/14/1982
4211700	Process for the preparation of lactames through oxime isomerization The invention relates to a process for the preparation of lactames according to the so-called "Beckmann rearrangement" which consists in isomerizing oximes in a sulfuric solution, the weight ratio percentage of sulfuric acid to the combined amount of sulf...	07/08/1980
4028347	Method for processing lactam residues which contain boric acid Object of the invention is a process for the treatment of a lactam distillation residue which contains boric acid in which a polyhydric alcohol is added to the crude lactam. By these means the formation of deposits and incrustations on the heating surface...	06/07/1977
3960846	Method for purifying lactams The instant invention relates to a method for purifying lactams wherein the lactam to be purified is contacted in the fused state with inorganic adsorption agents. The said method comprises contacting the lactam to be purified in the fused state with an i...	06/01/1976
3954736	Production of lactams Continuous production of lactams by rearrangement of cycloalkanone oximes at from 210° to 450°C in contact with a supported catalyst in a fluidized bed wherein from 0.01 to 1 kg of steam is introduced above the fluidized bed for each kg of cycloalkanone...	05/04/1976
3944542	Conversion of ketoximes into lactams in organic sulfoxide solvents Organic sulfoxides such as dimethylsulfoxide are used in the transformation of alicyclic ketoximes into the corresponding lactams according to the Beckmann rearrangement in the presence of a strong acid cation exchange resin as disclosed. Thus cyclohexano...	03/16/1976

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Class 540/464 - Utilizing oximes, oxime salts, hydroxylamines, hydroxylamine salts or nitrosating agents to form the hetero ring (i.e., formation of the lactam ring)