Did You Know...
...that the Band-Aid Bandage was invented by a Johnson & Johnson employee whose wife had cut herself? Earl Dickson's wife was rather accident prone, so he set out to develop a bandage that she could apply without help. He placed a small piece of gauze in the center of a small piece of surgical tape, and what we know today as the Band Aid bandage was born!
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| Number | Title | Issue Date |
| 7763760 | Catalyst composition and method for halogenating aromatic compounds A method for ring-halogenating an aromatic compound comprises contacting with chlorine or bromine, a mixture comprising the aromatic compound and a mixed copper salt of formula Cu(Y)X, where Y comprises a counterion derived from an organic acid, where the organic ac... | 07/27/2010 |
| 7544847 | Method for producing 1,4-bis (dichloromethyl) tetrafluorobenzene A method for producing 1,4-bis(dichloromethyl)tetrafluorobenzene is disclosed, which is achieved by reacting tetrafluoroterephthaldehyde, SOCl2 and organic solvents. In the synthesis of 1,4-bis(dichloromethyl)-tetrafluorobenzene by adding formamides as ca... | 06/09/2009 |
| 7282615 | Catalyst compositions and their use for chlorinating aromatic compounds A method for ring-halogenating an aromatic compound comprises contacting the aromatic compound with chlorine or bromine in the presence of a catalyst composition, where the catalyst composition comprises at least one salt comprising a metal selected from the group c... | 10/16/2007 |
| 7084317 | Oxidative halogenation of aromatic compound A process for the halogenation of an aromatic compound wherein the aromatic compound is admixed with a halogenating agent in the presence of an ionic liquid is described. The method in preferably halide, sulfur or nitrate ionic liquids has significant advantages ove... | 08/01/2006 |
| 6710217 | Method for producing 4-chlorobiphenyl and 4-chlorobiphenyl-specific specifications The invention relates to a process for preparing 4-chlorobiphenyl by (a) reacting biphenyl and chlorine in the presence of one or more ring-chlorination catalysts, and (b) subjecting the reaction mixture obtained in step (a) to fractional distillation ... | 03/23/2004 |
| 6426440 | Method for preparing decomposition products from the thermal decomposition of 1,2-dichlorethane The work-up of the gaseous products from the thermal cracking of 1,2-dichloroethane is simplified if the cracking gases are cooled to a temperature range of about 150 to 180° C., only a subsidiary proportion, which comprises all the coke formed, being co... | 07/30/2002 |
| 6211399 | Pressurized chlorination and bromination of aromatic compounds Disclosed is a method of adding 1 to 4 chlorine or bromine atoms to an aromatic ring of compound that has at least one electron-withdrawing groups on that ring. The aromatic compound is reacted with a chlorinating agent or a brominating agent in the prese... | 04/03/2001 |
| 6118018 | Chlorination and bromination of aromatic compounds at atmospheric pressure Disclosed is a method of adding 1 to 4 chlorine or bromine atoms to an aromatic ring of compound that has at least one electron-withdrawing groups on that ring. The aromatic compound is reacted with a chlorinating agent or a brominating agent in the prese... | 09/12/2000 |
| 6117278 | Method of making -chloroxylenes Disclosed is a method for making high purity -chloroxylenes. A composition is formed of about 15 to about 80 wt % of a xylene and about 20 to about 85 wt % of a solvent. The solvent can be toluene, ring halogenated toluene, benzotrichloride, ring h... | 09/12/2000 |
| 6028232 | Para-chlorination of aromatic compound The present invention relates to a catalyst for preparing para-chloro aromatic compounds by the liquid-phase chlorination method. The catalyst is prepared by loading transition metal salts, rare earth metal salts or a mixture thereof, and alkali metal or ... | 02/22/2000 |
| 5969200 | Process for the manufacture of acetonylbenzamides Novel routes for the preparation of acetonylbenzamides are provided by the reaction of an amine and acyl chloride. Novel routes to various intermediates used in the manufacture of acetonylbenzamides are also disclosed.... | 10/19/1999 |
| 5734073 | Halogenation reactions A method of halogenating an aromatic compound which comprises the steps of reacting an halogenating agent with the aromatic compound in the presence of fluorine and an acid, wherein the halogenating agent is at least one of an iodinating agent, a brominat... | 03/31/1998 |
| 5369214 | Method for selective dehalogenation of halogenated polyaromatic compounds A method for dehalogenating halogenated polyaromatic compounds is provided wherein the polyaromatic compounds are mixed with a hydrogen donor solvent and a carbon catalyst in predetermined proportions, the mixture is maintained at a predetermined pressure... | 11/29/1994 |
| 5315049 | Process for the nuclear chlorination of aromatic hydrocarbons Alkylaromatics are subjected to nuclear chlorination in the liquid phase in the presence of Friedel-Crafts catalyst mixtures comprising compounds of iron and antimony and cocatalysts of the formula (II) ##STR1## wherein the substituents have the mean... | 05/24/1994 |
| 5210343 | Process for the preparation of p-dichlorobenzene Dichlorobenzene having an increased p-content and a greatly reduced m-content is obtained by ring chlorination of benzene or chlorobenzene in the presence of Friedel-Crafts catalysts if the reaction is carried out in the presence of co-catalysts of the fo... | 05/11/1993 |
| 5157173 | Process for 4-chlorobenzotrichloride 4-chlorobenzotrichloride was prepared by the chlorination of p-xylene in the vapor phase at a temperature above about 200° C. in the presence of an activated carbon catalyst and water. An approximately 75 percent calculated yield was obtained at 250° C.... | 10/20/1992 |
| 5149892 | Chlorinated benzenes Benzene or a chlorinated benzene feedstock compound represented by the formula C6 H6-x Clx is chlorinated in the rectifying zone of a catalytic distillation reactor to produce a chlorinated benzene product compound represe... | 09/22/1992 |
| 5107045 | Preparation of 4-bromo-O-xylene using excess bromine A regioselective process is provided for preparing 4-bromo-o-xylene in an isomer mixture of 4-bromo-o-xylene and 3-bromo-o-xylene by combining a molar excess of bromine with o-xylene. The produced 3-bromo-o-xylene isomer preferentially reacts with the exc... | 04/21/1992 |
| 5105036 | Process for ring-chlorination of aromatic hydrocarbons Aromatic hydrocarbons monosubstituted by straight-chain or branched C1 -C12 -alkyl or by Chd 3-C8 -cycloalkyl can be chlorinated in the aromatic ring in the liquid phase in the presence of Friedel-Crafts catalysts if cycli... | 04/14/1992 |
| 5095157 | Process for the preparation of 2-chloro-4-nitro-alkylbenzene In the preparation of 2-chloro-4-nitro-alkylbenzene by reaction of 4-nitro-alkylbenzene with elemental chlorine or chlorine-releasing compounds in the presence of a Friedel-Crafts catalyst in the liquid phase, particularly high selectivities in respect of... | 03/10/1992 |
| 5053566 | Process for the preparation of oligophenyls dihalogenated in the 4,4'-position Oligophenyls dihalogenated in the 4,4'-position, of the formula ##STR1## can be prepared by catalyzed halogenation of oligophenyls of the formula ##STR2## wherein, in the formulae, X1 and X2 independently of one another rep... | 10/01/1991 |
| 5026932 | Preparation of 4-bromo-o-xylene in liquid sulfur dioxide A regioselective process is provided for preparing 4-bromo-o-xylene in an isomer mixture of 4-bromo-o-xylene and 3-bromo-o-xylene by combining bromine with o-xylene in liquid sulfur dioxide medium. A bromine to o-xylene mole ratio of about 0.4:1 to about ... | 06/25/1991 |
| 5015792 | Preparation of 4,4'-dibromobiphenyl 4,4'-Dibromobiphenyl is selectively produced in high yields by actively brominating biphenyl in a reaction medium containing at least one strong acid having a pKa of at most 4, e.g., a carboxylic or sulfonic acid, and, optionally, a reaction solvent.... | 05/14/1991 |
| 5001290 | Production of dichlorobenzene with high para to ortho ratios A method for producing p-dichlorobenzene using a reactor containing a catalyst/reagent to convert chlorobenzene (or benzene) to p-dichlorobenzene, the reactor having an inlet and an outlet for introducing reactants and removing product; introducing a puls... | 03/19/1991 |
| 4990707 | Process for the ring chlorination of aromatic hydrocarbons Aromatic hydrocarbons which are monosubstituted by straight-chain or branched C1 -C12 -alkyl or by C3 -C8 -cycloalkyl can be chlorinated in the presence of Friedel-Crafts Catalysts in liquid phase on the aromati... | 02/05/1991 |
| 4990706 | Process for producing para-dichlorobenzene As zeolite L is used as catalyst for the chlorination of benzene, chlorobenzene, ortho-dichlorobenzene, and/or meta-dichlorobenzene, its catalytic activity diminishes. Zeolite L which has been used for such chlorinations may be reactivated by contact with... | 02/05/1991 |
| 4942268 | Process for producing a halobenzene A process for producing a halobenzene represented by the formula: ##STR1## where R is a lower alkyl group, a lower alkoxy group or a halogen atom, and X is a halogen atom, which comprises halogenating a benzene represented by the formula: ##STR2... | 07/17/1990 |
| 4925994 | Process for the ring chlorination of aromatic hydrocarbons Aromatic hydrocarbons which are monosubstituted by straight-chain or branched C1 -C12 -alkyl or by C3 -C8 -cycloalkyl can be chlorinated in the presence of Friedel-Crafts Catalysts in liquid phase on the aromati... | 05/15/1990 |
| 4914247 | Process for preparing para-substituted halogenobenzene derivatives A para-substituted halogenobenzene derivative is prepared by halogenating a benzene derivative in the liquid phase in the presence of a molded zeolite catalyst body comprising, based on the weight of the molded zeolite catalyst body, 10 to 95% by weight o... | 04/03/1990 |
| 4898999 | Process for halogenating cyclobutenoarenes A process for the preparation of cyclobutenohaloarenes is described in which a cyclobutenoarene such as benzocyclobutene is reacted with a halogen in the organic phase of a two-phase organic/aqueous system to form a cyclobutenohaloarene and hydrogen halid... | 02/06/1990 |
| 4891455 | Process for preparing monohalogenated cyclobutarenes Monohalogenated cyclobutarenes are prepared by halogenating a cyclobutarene in the presence of an organic complexing agent, an acid scavenger, or water. Faster reaction rates highly selective to monohalogenated cyclobutarenes are obtained without conventi... | 01/02/1990 |
| 4886923 | Process for the preparation of tricyclo 8.2.2.2 hexadeca 4,6,10,12,13,15 hexaene chlorinated in the benzene rings A process for the chlorination of the benzene rings of tricyclo 8.2.2.2 hexadeca 4,6,10,12,13,15 hexane (or (2,2)-paracyclophane) having the formula (I): ##STR1## by gaseous chlorine, by operating in the presence of at least one metal chloride a... | 12/12/1989 |
| 4885417 | Method for the decoloration of chloro-xylene compositions Off-color liquid ortho-chloro-para-xylene compositions are decolorized by contacting the compositions with particles of diatomaceous silica, magnesium oxide or soda ash.... | 12/05/1989 |
| 4851596 | Process for nucleus-chlorination of aromatic hydrocarbons Aromatic hydrocarbons are chlorinated in the nucleus in the presence of Friedel-Crafts catalysts and in the presence of co-catalysts in the liquid phase by using thiazepines as co-catalysts.... | 07/25/1989 |
| 4849560 | Process for preparation of halogenated benzene derivatives p-Substituted halogenated benzene derivatives are prepared at a high selectivity by halogenating benzene and/or benzene derivatives by using as a catalyst a zeolite modified with a metal salt.... | 07/18/1989 |
| 4835327 | Method for producing 1,2,4-trichlorobenzene 1,2,4-Trichlorobenzene is produced by chlorinating benzene, chlorobenzene, meta-dichlorobenzene, ortho-dichlorobenzene, or a mixture of two or more thereof in a reaction medium comprising a liquid phase and a catalytic amount of zeolite L, zeolite Y, or a... | 05/30/1989 |
| 4831199 | Process for producing a halobenzene A process for producing a halobenzene represented by the formula: ##STR1## where R is a lower alkyl group, a lower alkoxy group or a halogen atom, and X is a halogen atom, which comprises halogenating a benzene represented by the formula: ##STR2... | 05/16/1989 |
| 4827058 | Process for the removal of m-chlorotoluene from chlorotoluene mixtures m-Chlorotoluene is removed from chlorotoluene mixtures with a content of up to 10% by weight of m-chlorotoluene, with reference to the total amount of chlorotoluene in the mixture, by chlorinating a substantially toluene-free chlorotoluene mixture in the ... | 05/02/1989 |
| 4822933 | Process for producing a chlorohalobenzene A process for producing a chlorohalobenzene represented by the general formula: ##STR1## where X' is a halogen atom, by chlorinating a benzene represented by the general formula: ##STR2## where X is a hydrogen atom or a halogen atom, in a l... | 04/18/1989 |
| 4822930 | Process for preparing monobrominated cyclobutarenes Monobrominated cyclobutarenes are prepared by brominating a cyclobutarene in the presence of an organic complexing agent, an acid scavenger, or water. Faster reaction rates highly selective to monobrominated cyclobutarenes are obtained without conventiona... | 04/18/1989 |
