High purity paraffinic solvent compositions, and process for the

Details High purity paraffinic solvent compositions, and process for the High purity paraffinic solvent compositions, and process for the

1995-12-08

1998-11-10

Griffin, Walter D.

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Cracking

208102, 208136, 208138, 585752, 585 13, C10G 4700, C10G 3504

Patent

active

058338390

ABSTRACT:
Discloses high purity solvent compositions constituted of n-paraffins and isoparaffins, with the isoparaffins containing predominantly methyl branches, and having an isoparaffin:n-paraffin ratio sufficient to provide superior low temperature properties and low viscosities. The solvent compositions are made by a process wherein a waxy, or long chain paraffinic feed, especially a Fischer-Tropsch wax, is reacted over a dual function catalyst to produce hydroisomerization and hydrocracking reactions at 700.degree. F.+ conversion levels ranging from about 20 to 90 wt. % to provide a C.sub.5 -1050.degree. F. crude fraction. The C.sub.5 -1050.degree. F. crude fraction is then topped via atmospheric distillation to produce a low boiling fraction with an upper end point boiling between about 650.degree. F. and 750.degree. F. The low boiling fraction is fractionated and a narrow boiling range solvent obtained therefrom; one which can be further divided into solvent grades of various boiling ranges.

REFERENCES:
patent: 2668866 (1954-02-01), Good et al.
patent: 4832819 (1989-05-01), Hamner
patent: 4919786 (1990-04-01), Hamner et al.

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