Processes of this kind are described, for example, in The Oil and Gas Journal, Jan. Catalytic dewaxing processes achieve this end by selectively cracking the longer chain n-paraffins, to produce lower molecular weight products which may be removed by distillation. propane dewaxing, MEK dewaxing, but the decrease in demand for petroleum waxes as such, together with the increased demand for gasoline and distillate fuels, has made it desirable to find processes which not only remove the waxy components but which also convert these components into other materials of higher value.

In the past, various solvent removal techniques were used e.g. The higher molecular weight straight chain normal and slightly branched paraffins which are present in oils of this kind are waxes which are the cause of high pour points in the oils and if adequately low pour points are to be obtained, these waxes must be wholly or partly removed. lubricating oils, heating oils, jet fuels. Dewaxing is, as is well known, required when highly paraffinic oils are to be used in products which need to remain mobile at low temperatures e.g. Processes for dewaxing petroleum distillates have been known for a long time. This invention relates to a process for dewaxing hydrocarbon oils. to 450° C., a pressure from 4,000 to 10,000 kPa and a space velocity (LHSV) from 0.2 to 5 hr. A process according to claim 9 in which the feedstock is contacted with the catalyst in the presence of hydrogen under isomerization conditions of a temperature from 400° C. to 540° C., a pressure from atmospheric to 25,000 kPa and a space velocity (LHSV) from 0.1 to 20 hr. A process according to claim 1 in which the feedstock is contacted with the catalyst in the pressure of hydrogen under isomerization conditions of a temperature from 200° C.

A process according to claim 1 in which the feedstock is contacted with the catalyst in the absence of added hydrogen.ĩ. A process according to claim 6 in which the hydrogenation component comprises platinum.Ĩ. A process according to claim 1 in which the hydrogenation component comprises a noble metal of Group VIIIA of the Periodic Table.ħ. A process according to claim 1 in which the zeolite beta has a silica:alumina ratio of at least 250:1.Ħ. A process according to claim 1 in which the zeolite beta has a silica:alumina ratio over 100:1.ĥ. A process according to claim 2 in which the proportion of aromatic components is from 10 to 50 weight percent of the feedstock.Ĥ. A process according to claim 1 in which the feedstock includes aromatic components in addition to the straight chain paraffins.ģ. A process for dewaxing a hydrocarbon feedstock containing straight chain paraffins, which comprises contacting the feedstock with a catalyst comprising zeolite beta having a silica:alumina ratio of at least 30:1 and a hydrogenation component under isomerization conditions.Ģ.

Dewaxing process of light gas oil