[특허]Partial oxidation process with magnetic separation of the ground slag

[미국특허] Partial oxidation process with magnetic separation of the ground slag 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	C01B-031/18
출원번호	US-0947122 (1986-12-29)
발명자 / 주소	Najjar Mitri S. (Hopewell Junction NY) Becker Michael W. (Westminster CA)
출원인 / 주소	Texaco Inc. (White Plains NY 02)
인용정보	피인용 횟수 : 44 인용 특허 : 17

초록 ▼

Synthesis gas is produced by the partial oxidation of a feedstock comprising petroleum coke and/or heavy liquid hydrocarbon fuel containing sulfur and having an ash that contains nickel, vanadium and silicon. An iron-containing or an iron and calcium-containing additive is introduced into the reaction zone along with the feed. The additive combines with at least a portion of the iron and nickel constituents and sulfur found in the feedstock to produce a liquid phase washing agent that collects and transports at least a portion of the vanadium-containing oxide laths and spinels and other ash components out the reaction zone. Slag and other particulate matter is separated from the effluent gas stream and ground to produce a heterogeneous mixture of magnetic and non-magnetic solid particles. The particles have various degrees of magnetic susceptibility and are thereby separated into the following three separate portions of magnetic particles: (1) particles of an Fe-Ni alloy, and a minor amount of magnetite particles; (2) particles of an oxysulfide phase of iron and nickel, a minor amount of particles of vanadium compounds, and particles of iron silicate and calcium silicate; and (3) particles of vanadium-containing spinels, and particles of metal silicates. The first and third portions are sent to a metal refiner to recover nickel and vanadium respectively. The second portion of magnetic particles having an increased Fe/V wt. ratio is recycled through the gasifier.

대표청구항 ▼

A process for the production of gaseous mixtures comprising H2+CO by the partial oxidation of a feedstock comprising a heavy liquid hydrocarbonaceous fuel having a nickel- and vanadium-containing ash or petroleum coke having a nickel- and vanadium-containing ash, or mixtures thereof; and said feedstock includes a minimum of 0.5 wt. % of sulfur and said ash includes a minimum of 5.0 wt. % vanadium, a minimum of 2.0 wt. % of nickel, and silicon; comprising the steps of: (1) mixing together with said feedstock, additive A comprising an iron-containing additive when the silicon content of said feedstock is less than about 350 ppm, or additive B comprising an iron- and calcium-containing additive when the silicon content of said feedstock is about 400 ppm or more, wherein the weight ratio of additive A or B to said ash is in the range of about 1.0-10.0 to 1.0, and for each part by weight of vanadium there is at least 10 parts by weight of iron when additive A is used, or at least 10 parts by weight of iron plus calcium when additive B is used; (2) reacting the mixture from (1) at a temperature in the range of about 2200°F. to 3000°F. and a pressure in the range of about 5 to 250 atmospheres in a free-flow refractory-lined partial oxidation reaction zone with a free-oxygen containing gas in the presence of a temperature moderator and in a reducing atmosphere to produce a hot raw effluent gas stream comprising H2+CO and entrained molten slag including vanadium-containing oxide laths and spinels; and where in said partial oxidation reaction zone when additive A is used said iron-containing additive combines with at least a portion of said nickel constituents and sulfur found in the feedstock to produce a liquid phase washing agent that collects and transports at least a portion of the vanadium-containing oxide laths and spinels and other ash components and refractory out of reaction zone; and when additive B is used separate portions of said iron- and calcium-containing additive (I) combine with a portion of said nickel, calcium and sulfur to generate a liquid phase washing agent that collects and transports a portion of the vanadium-containing oxide laths and spinels and other ash components and refractory; and (II) combine with a portion of said nickel, calcium and silicon to generate a liquid oxide-silicate phase that fluxes substantially all of the remaining portion of said vanadium-containing oxide laths and spinels and other ash components; (3) cooling and cleaning said hot raw effluent gas stream from (2) by direct contact with water in a quench zone to produce an aqueous suspension of slag and other small solid particles; (4) grinding and drying the slag and other particulate solids from (3) to produce a ground heterogeneous mixture of particles having varying magnetic susceptibilities, and non-magnetic solid particles; wherein said ground heterogeneous mixture of particles has a particle size of less than 180 microns, and a moisture content of less than 3.0 wt. %; (5) separating said ground heterogeneous mixture of particles from (4) by electromagnetic means including spaced apart poles by introducing a portion of said ground heterogeneous mixture of solid particles from (4) about 38 to 600 microns thick between the poles of said electromagnetic means having a low magnetic field strength in the range of about 10 to 1000 gausses, and separating a first portion of magnetic particles from a first residue mixture of magnetic and non-magnetic particles; wherein said first portion of magnetic particles comprises a heterogeneous mixture of particles of an Fe-Ni alloy and about 0 to 10 wt. % of magnetite particles; and said Fe-Ni alloy comprises about 70-95 wt. % Fe and the remainder Ni, and said Ni comprises about 40 to 85 wt. % of the total amount of nickel present in the ground mixture of solid particles from (4); and said first portion of magnetic particles comprises about 0.2 to 5.0 wt. % of the ground mixture of solid particles from (4); (6) separating said heterogeneous mixture of particles from (5) by electromagnetic means including spaced part poles by introducing a portion of said first residue mixture of magnetic and non-magnetic particles from (5) about 38 to 600 microns thick between the poles of said electromagnetic means having a medium magnetic field strength in the range of about 1,000 to 10,000 gausses, and separating a second portion of magnetic particles from a second residue mixture of magnetic and non-magnetic particles; wherein said second portion of magnetic particles comprises a heterogeneous mixture of particles which have a lesser magnetic susceptibility than that of the particles in said first portion of magnetic particles, and which comprises particles of a solid portion of Fe and Ni oxy-sulfide; about 0.1 to 2.0 wt. % of particles of vanadium compounds; and particles of iron silicate and calcium silicate; and said second portion of magnetic particles comprises about 85 to 98 wt. % of the ground mixture of solid particles from (4) and contains about 70 to 95 wt. % of the iron; and (7) separating said heterogeneous mixture of particles from (6) by electromagnetic means including spaced apart poles by introducing a portion of said second residue mixture of magnetic and non-magnetic particles from (6) about 38 to 600 microns thick between the poles of said electromagnetic means having a high magnetic field strength in the range of about 8,000 to 40,000 gausses, and separating a third portion of magnetic particles from a third residue mixture of particles; wherein said third portion of magnetic particles comprises a heterogeneous mixture of particles which have a lesser magnetic susceptibility than that of the particles in said second portion of magnetic particles, and which comprises particles of a vanadium-containing spinel; and a mixture of particles comprising at least one metal silicate wherein the metal in said metal silicate is selected from the group consisting of iron, magnesium, aluminum, calcium, and mixtures thereof; and said third portion of magnetic particles comprises about 1 to 14 wt. % of the ground mixture of solid particles from (4) and contains about 60 to 98 wt. % of the vanadium in said mixture from (4).

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[미국특허] Partial oxidation process with magnetic separation of the ground slag 원문보기

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