Abstract: Biobased p-cymene and methods of producing same, which can further be converted to terephtalate. Further, a method is described for converting crude sulfate turpentine recovered from chemical wood pulping into p-cymene and eventually to terephtalic acid of biological origin, and and products thereof respectively. In said method, both conversion and desulfurization is realized in one reaction step. The disclosure is also related to use of zeolite catalysts in said method.
Type:
Application
Filed:
June 3, 2011
Publication date:
June 27, 2013
Applicant:
STORA ENSO OYJ
Inventors:
Jari Rädänen, Tapani Penttinen, Ali Harlin, Reetta Kaila
Abstract: A moving bed process for producing aromatic compounds comprises at least a first step in which principally naphthene dehydrogenation is carried out in the presence of hydrogen in a mole ratio (H2)1/(HC), said step being followed by at least one subsequent step carried out at a mole ratio (H2)2/(HC)2, the process also comprising reducing the catalyst with hydrogen in a ratio (H2)red/(HC). In accordance with the invention, (H2)1/(HC)+(H2)red/(HC)≦(H2)2/(HC)2, (HC) representing the molar quantity of feed in the first step and (HC)2 that of the subsequent step, or (H2)1/(HC)+(H2)red/(HC)>(H2)2/HC2, but where (H2)1/(HC) is less than (H2)2/(HC)2. Particular application to reforming.
Type:
Grant
Filed:
November 30, 2000
Date of Patent:
December 9, 2003
Assignee:
Institut Francais du Pétrole
Inventors:
Francois-Xavier Brunet, Olivier Clause, Jean-Marie Deves, Eric Sanchez, Frederic Hoffmann
Abstract: The invention is directed to a process for the catalytic oxidation of an isoprenoid containing at least one allylic hydrogen atom, which process comprises reacting the isoprenoid with oxygen or an oxygen-containing gas in an inert solvent in the presence of a N-hydroxydicarboxylic acid imide of the formula ##STR1## wherein A-B stands for CH.sub.2 -CH.sub.2, CH.dbd.CH, an aromatic hydrocarbon residue or a group derived from one of these groups in which one or more hydrogen atoms is/are replaced by alkyl or halogen,to produce a primary of secondary hydroperoxide.The process of the invention is suitable for the manufacture of steroids, vitamins, odorant substances, carotinoids and the like.
Type:
Grant
Filed:
August 31, 1990
Date of Patent:
July 9, 1991
Assignee:
Hoffman-La Roche Inc.
Inventors:
Joseph Foricher, Claude Furbringer, Karlheinz Pfoertner
Abstract: Alkylbenzenes of the general formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.4 -alkyl, preferably methyl, and R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl, preferably methyl, are prepared by catalytic aromatization of the corresponding alkenylcyclohexenes of the general formula II ##STR2## by carrying out the conversion in the gas phase at 150.degree.-400.degree. C. over a catalyst which contains palladium oxide and sulfur and/or selenium or selenium oxide on active carbon.
Abstract: Alkylbenzenes are prepared by converting an alkyl-, alkylidene- or alkenylcyclohexene or an alkyl- or alkenylcyclohexadiene in the presence of an acidic zeolite catalyst of the pentasil type, in the gas phase or liquid phase.
Type:
Grant
Filed:
March 18, 1986
Date of Patent:
May 12, 1987
Assignee:
BASF Aktiengesellschaft
Inventors:
Wolfgang Hoelderich, Rolf Fischer, Wolf D. Mross, Frank-Friedrich Pape
Abstract: There is disclosed a process for the conversion of terpenes to cymenes which comprises contacting at least one terpene, selected from the group comprised of mono- and bi-cyclic unsaturated hydrocarbons having the formula C.sub.10 H.sub.16 ; with an alkali metal carbonate catalyst on a support at a temperature of 300.degree. to 475.degree. C.
Type:
Grant
Filed:
October 14, 1981
Date of Patent:
May 3, 1983
Assignee:
The Goodyear Tire & Rubber Company
Inventors:
Lawson G. Wideman, Joseph A. Kuczkowski
Abstract: There is disclosed a process for the conversion of terpenes to .alpha.-methyl-methylstyrenes and cymenes which comprises contacting at least one terpene, selected from the group comprised of mono- and bi-cyclic unsaturated hydrocarbons having the formula C.sub.10 H.sub.16 ; with an alkali metal hydroxide catalyst on a support at a temperature of 300.degree. to 500.degree. C.