Shell Oil Comapny

Michael Christopher Phillips

Koen Steernberg

Gerrit Van Gooswilligen

The invention provides a process for preparing a bitumen composition comprising blowing a mixture with an oxygen-containing gas which mixture comprises a bitumen having a penetration of less than 300 dmm (as measured by ASTM D 5 at 25.degree. C.), a thermoplastic rubber which is present in an amount of less than 10% w, and a bitumen blowing catalyst which is present in an amount of more than 0.5% w and up to 3% w, both based on total mixture; and bitumen compositions obtainable by such process.

Bitumen compositions and a process for their preparation

The invention provides a process for preparing a bitumen composition comprising blowing a mixture with an oxygen-containing gas which mixture comprises a bitumen having a penetration of at least 300 dmm (as measured by ASTM D 5 at 25.degree. C.), a thermoplastic rubber which is present in an amount of less than 10% w, and a bitumen blowing catalyst which is present in an amount in the range of from 1 to 3% w, both based on total mixture; and bitumen compositions obtainable by such process.

Process and apparatus for the removal of carbonaceous materials from particles containing such materials, comprising introducing said particles into the lower part of a first, riser-type reactor, into which lower part an oxygen-containing gas is introduced, the reactor being operated under entrainment conditions with a relatively high density phase in the lower part and with a relatively low density phase in the upper part at a temperature suitable to burn off carbonaceous materials at such a rate that the flue gas at the top of the reactor does not contain any substantial amount of oxygen, separating solids and gas at the top of the reactor, introducing the separated particles into the upper part of a second, fluidized bed-type reactor while introducing an oxygen-containing gas into the lower part of the second reactor, the reactor being operated under fluidized bed conditions at a temperature suitable to burn off carbonaceous materials, the amount of oxygen-containing gas being established in such a way that the flue gas at the top of the reactor is substantially free of oxygen, removing processed particles from the lower part of the reactor, and recirculating a part of the processed particles to the lower part of the riser-type reactor.

Growing community of inventors

Amsterdam, Netherlands

Michael Christopher Phillips