PRODUCTION OF HIGH-PURITY SOLVENT COMPOSITION BY HYDRISOMERIZATION OF FEEDSTOCK MAINLY COMPRISING N-PARAFFIN

• Main Authors: WITTENBRINK ROBERT JAY, RYAN DANIEL FRANCIS, SILVERBERG STEVEN EARL
• Format: Patent
• Language: English
• Published: 24.02.1998
• Edition: 6
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; CRACKING HYDROCARBON OILS; FUELS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; LUBRICANTS; METALLURGY; MINERAL WAXES; PEAT; PERFORMING OPERATIONS; PETROLEUM, GAS OR COKE INDUSTRIES; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVEHYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, ORGASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; TECHNICAL GASES CONTAINING CARBON MONOXIDE; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ARTCOLLECTIONS [XRACs] AND DIGESTS; THEIR RELEVANT APPARATUS; TRANSPORTING

PROBLEM TO BE SOLVED: To obtain a high-purity solvent compsn. which has excellent low-temp. properties and a low viscosity by bringing a feedstock mainly comprising a specific n-paraffin into contact with hydrogen in the presence of a dual-function catalyst to thereby cause the hydrisomerization of the feed. SOLUTION: The feedstock used is an 8-20C n-paraffin, pref. one mainly comprising a 10-16C n-paraffin. The hydrisomerization is conducted in the presence of a dual-function catalyst (e.g. Pd or Pt sulfide supported by silica, etc.) at 400-850 deg.F under a pressure of 100-1,500 psig with a hydrogen gas added in an amt. of 1,000-10,000 SCFB at a space velocity of 0.5-10W/Hr/W. This reaction converts the main part of the feedstock into isoparaffins having at least one methyl branch without causing molecular fission at all. The obtd. solvent has a ratio of isoparaffin to n-paraffin of (0.5:1)-(9:1) and a b.p. of 320-650 deg.F.