Classifications

• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
  • C10G59/00—Treatment of naphtha by two or more reforming processes only or by at least one reforming process and at least one process which does not substantially change the boiling range of the naphtha
  • C10G59/02—Treatment of naphtha by two or more reforming processes only or by at least one reforming process and at least one process which does not substantially change the boiling range of the naphtha plural serial stages only
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
  • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
• • C—CHEMISTRY; METALLURGY
  • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
  • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
  • C10G35/00—Reforming naphtha
  • C10G35/04—Catalytic reforming
  • C10G35/06—Catalytic reforming characterised by the catalyst used

Definitions

• This invention relates to the catalytic reforming of petroleum hydrocarbons for the production of aromatics, motor gasoline and the like.
• the object of the present invention is further to improve reforming processes using chromia-alumina catalyst.
• a feedstock consisting of or containing non-aromatic hydrocarbons is contacted with a catalyst comprising chromia, alumina and a minor proportion of boron, at a temperature of from 450 to 580 C. and a pressure up to 50 p.s.i.g. to yield a product with a higher aromatic content than the feedstock, there being no addition of hydrogen, whether extraneous or recycled, to the reaction zone.
• the present process besides yielding a normally liquid product having an appreciable content of aromatics and some olefins, also produces appreciable quantities of a hydrogen-rich gas, which is available as a valuable byproduct.
• a pressure up to 50 p.s.i.g. includes atmospheric pressure or below, atmospheric pressure being, in fact, preferred.
• a temperature in the vicinity of 525 C. is particularly preferred and the space velocity may be from 0.1 to 1.0 v./v./hr. of liquid feedstock.
• the boron in the catalyst is preferably present as an oxide and preferably there is also a minor proportion of an alkali metal compound, for example a potassium compound, particularly the oxide.
• the relative proportions of the catalyst components by weight of total catalyst material stable at 1020" F. are, preferably, within the limits:
• the catalyst may be used in the form of a fixed bed, a moving bed or a fluidized bed. Since it is readily regenerated by burning 01f carbonaceous deposits in a stream of oxygen-containing gas, it is particularly suitable for fluidized or moving bed processes.
• the process makes available a large quantity of hydrogen-rich gas as a valuable by-product.
• the feedstock used should boil within the gasoline or naphtha range, and a particularly preferred fraction consists predominantly of a mixture of C -C hydrocarbons.
• the feedstock may be a straight-run feedstock, particularly a lower-boiling straight-run fraction commonly known as primary flash distillate.
• gasoline blending components of high octane number and high volatility may be prepared from such feedstocks, in particular gasoline blending components having a research octane number (clear) of at least 90 and a volatility of at least 70%. evaporated at 100 C.
• the feedstock may be the product of a previous catalytic reforming process so that the present invention includes a two-stage reforming process designed to produce aromatics and high octane gasoline fractions with preferably a research octane number (clear) of the order of 100.
• a two-stage reforming process designed to produce aromatics and high octane gasoline fractions with preferably a research octane number (clear) of the order of 100.
• Any convenient reforming process may be used as the first stage, but
• the whole of the reformate from the first stage may be reformed in the second stage, but since the higher boiling end is rich in aromatics which are notsusceptible to further upgrading, the reformate is preferably fractionated to give a lower-boiling relatively aromatic-free fraction which is subjected to the further treatment.
• the reformate may be solvent extracted andthe raffinate or a fraction th'ereofsub jected to the further treatment.
• the product may be recombined with the higher boiling fraction or the solvent extract as the case may be, but it may also be combined with other high octane components for example heavy cat. cracked gasoline or alkylate.
• the catalyst may be prepared by any convenient method for example, by impregnation of alumina with a solution containing chromium, boron and preferably potassium.
• EXAMPLE 1 A platformate was split into light and heavy fractions, the light fraction having an end boiling point of 108 C. and a research octane number (clear) of 76.1. This light platformate was further reformed under the following conditions: a
• a process for the treatment of a feedstock consisting essentially of a mixture of C to C non-aromatic hydrocarbons to efiect a dehydrogenation or dehydrocyclization thereof comprising contacting the feedstock in a reaction zone with a catalyst consisting essentially of 5 to 25% of chromium oxide, 0.1 to 5% boron, expressed. as oxide, and balance, alumina, at a temperature of about 450 to 580 C., at a pressure not in excess of about p.s.i.g., at a space velocity of 0.1 to 1 v./v./ hr., and in the absence of added hydrogen to the reaction zone, and recovering a product having increased aromatic content.
• a process for the treatment of a feedstock consisting essentially of a mixture of C to C non-aromatic hydrocarbons to effect a dehydrogenation or dehydrocyclization thereof comprising contacting the feedstock in a reaction zone with a catalyst consisting essentially of 5 to 25% of chromium oxide, 0.1 to 5% boron, expressedas oxide, 0.1 to 5% of an alkali metal, expressed as oxide, and balance alumina, at a temperature of about 450. to 580 C., at a pressure not in excess of about 50 p.s.i.g., at a space velocity of 0.1 to 1 v./v./hr., and in the absence of added hydrogen to the reaction zone, and recovering a product having increased aromatic content.
• feedstock is a portion of a catalytic reformate, said portion consisting essentially of C to C non-aromatic hydrocarbons.
• feedstock is a portion of a platinum reformate, said portion consisting essentially of C to C non-aromatic hydrocarbons.

Landscapes

• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Materials Engineering (AREA)
• Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
• Catalysts (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=10396674

Family Applications (1)

Country Status (5)

Cited By (9)

Citations (5)

Family Cites Families (2)

• 0
  • BE BE568253D patent/BE568253A/xx unknown
• 1956
  • 1956-12-07 GB GB37463/56A patent/GB827000A/en not_active Expired
• 1957
  • 1957-12-04 US US700564A patent/US2967822A/en not_active Expired - Lifetime
  • 1957-12-04 FR FR1187483D patent/FR1187483A/fr not_active Expired
  • 1957-12-06 DE DEB47027A patent/DE1054624B/de active Pending

Patent Citations (5)

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