Integrated process for making propene oxide and an alkyl tert-butyl ether

An integrated process for making propene oxide and an alkyl tert-butyl ether, comprising:

• a) a step of dehydrogenating a feed stream S1 comprising iso-butane, to provide a stream, S2, comprising iso-butene and hydrogen;
• b) a separation step separating stream S2 into a stream, S3, consisting essentially of hydrogen and a stream, S4, comprising iso-butene;
• c) a step of reacting a part or all of stream S4 with an alkanol in the presence of a solid acid catalyst, to provide a stream, S5, comprising an alkyl tert-butyl ether;
• d) a separation step separating the alkyl tert-butyl ether from stream S5;
• e) a step of reacting a part or all of stream S3 with oxygen, to provide a stream, S6, comprising hydrogen peroxide;
• f) a step of reacting a part or all of stream S6 with propene in the presence of an epoxidation catalyst, to provide a stream, S7, comprising propene oxide;
• and
• g) a separation step separating propene oxide from stream S7.

An integrated process for making propene oxide and methyl tert-butyl ether, comprising:

• a) a step of dehydrogenating a feed stream, S1, comprising iso-butane, to provide a stream, S2, comprising iso-butene and hydrogen;
• b) a separation step separating stream S2 into a stream, S3, consisting essentially of hydrogen and a stream, S4, comprising iso-butene;
• c) a step of reacting a part or all of stream S4 with methanol in the presence of a solid acid catalyst, to provide a stream, S5, comprising methyl tert-butyl ether;
• d) a separation step separating methyl tert-butyl ether from stream S5;
• e) a step of reacting a part or all of stream S3 with oxygen in an anthraquinone process, to provide a stream, S6, comprising hydrogen peroxide as a 20 to 75% by weight aqueous solution of hydrogen peroxide;
• f) a step of reacting a part or all of stream S6 with propene in the presence of an epoxidation catalyst, to provide a stream, S7, comprising propene oxide;
• and
• g) a separation step separating propene oxide from stream S7.