Method and apparatus for partially solidifying a methane comprising stream

Apparatus for partially solidifying a methane comprising stream, the apparatus comprising

• a feed conduit arranged to receive a liquid methane comprising stream at a first pressure (P1),
• a slush vessel which is in fluid communication with the feed conduit to receive the liquid methane comprising stream,
• a vapour withdrawing device being in fluid communication with the slush vessel to withdraw vapour from the slush vessel and keep the slush vessel at a second pressure (P2), the second pressure (P2) being lower than the first pressure (P1), and the second pressure being substantially equal to or lower than the triple point pressure of the methane comprising stream.