An integrated process for making propene oxide and an alkyl tert-butyl ether comprises dehydrogenating a feed stream comprising propane and iso-butane to provide a stream comprising propene, iso-butene and hydrogen; separating this stream into a stream consisting essentially of hydrogen and a stream comprising propene and iso-butene; separating the stream comprising propene and iso-butene into a stream comprising propene and a stream comprising iso-butene; reacting a part or all of the stream comprising iso-butene with an alkanol in the presence of a solid acid catalyst to provide an alkyl tert-butyl ether; and reacting a part or all of the stream comprising propene with hydrogen peroxide in the presence of an epoxidation catalyst to provide propene oxide.

A composition comprising a compound of formula (Va) wherein n is 1 or 2 and wherein m is 1 or 2, with n and m preferably both being 1 or both being 2, more preferably both being 1, and/or, preferably and, a compound of formula, wherein n is 1 or 2 and wherein m is 1 or 2, with n and m preferably both being 1 or both being 2, more preferably both being 1, and wherein at least 90 weight-% of the composition consist of compounds of formula (Va) and formula (Vb).

##STR00001##

The present invention relates to novel anthraquinone derivatives, 2,6-diisohexylanthracene-9,10-dione and 2,7-diisohexyl-anthracene-9,10-dione, preferably to be used for the preparation of hydrogen peroxide, and to a process for the preparation of these anthraquinone derivatives.

The present invention relates to novel anthraquinone derivatives, 2,6-diisohexylanthracene-9,10-dione and 2,7-diisohexyl-anthracene-9,10-dione, preferably to be used for the preparation of hydrogen peroxide, and to a process for the preparation of these anthraquinone derivatives.

A solvent system of a working solution for producing hydrogen peroxide through anthraquinone process contains or consists of the following components, in parts by volume: A) 2-60 parts of an imide derivative represented by formula (I); B) 40-98 parts of an aromatic hydrocarbon, preferably C.sub.9-10 aromatic hydrocarbon; C) 0-20 parts of trioctyl phosphate; and D) 0 to 20 parts of diisobutylcarbinol. The solvent system achieves good solubility of both anthraquinone and anthrahydroquinone, low intersolubility with water and stable physicochemical properties.

##STR00001##

A solvent system of a working solution for producing hydrogen peroxide through anthraquinone process contains or consists of the following components, in parts by volume: A) 2-60 parts of an imide derivative represented by formula (I); B) 40-98 parts of an aromatic hydrocarbon, preferably C.sub.9-10 aromatic hydrocarbon; C) 0-20 parts of trioctyl phosphate; and D) 0 to 20 parts of diisobutylcarbinol. The solvent system achieves good solubility of both anthraquinone and anthrahydroquinone, low intersolubility with water and stable physicochemical properties.

##STR00001##

A process for producing hydrogen peroxide with an oxidizing unit in an anthraquinone process can be performed. The process and oxidizing unit have a compressor for obtaining hot compressed oxygen containing gas. The hot compressed oxygen containing gas is utilized in a heat exchanger to increase the temperature of a compressed (cold) offgas obtained in an oxidizing step for the production hydrogen peroxide. Accordingly, the compressed and heated offgas can subjected to an expander without the formation of droplets or damaging the equipment. Moreover, the process and an oxidizing unit reduce the required amount of energy in the form of electrical power and steam, as well as the required amount of cooling medium in an anthraquinone process.

A process for producing hydrogen peroxide with an oxidizing unit in an anthraquinone process can be performed. The process and oxidizing unit have a compressor for obtaining hot compressed oxygen containing gas. The hot compressed oxygen containing gas is utilized in a heat exchanger to increase the temperature of a compressed (cold) offgas obtained in an oxidizing step for the production hydrogen peroxide. Accordingly, the compressed and heated offgas can subjected to an expander without the formation of droplets or damaging the equipment. Moreover, the process and an oxidizing unit reduce the required amount of energy in the form of electrical power and steam, as well as the required amount of cooling medium in an anthraquinone process.

The present invention relates to novel anthraquinone derivatives, 2,6-diisohexylanthracene-9,10-dione and 2,7-diisohexyl-anthracene-9,10-dione, preferably to be used for the preparation of hydrogen peroxide, and to a process for the preparation of these anthraquinone derivatives.

The present invention relates to novel anthraquinone derivatives, 2,6-diisohexylanthracene-9,10-dione and 2,7-diisohexyl-anthracene-9,10-dione, preferably to be used for the preparation of hydrogen peroxide, and to a process for the preparation of these anthraquinone derivatives.