CAS: 12035-72-2; Nickel Sulfide

专利信息

专利号:US-4781731-A
优先权日:1987-12-31
标题 :Integrated method of charge fuel pretreatment and tail gas sulfur removal in a partial oxidation process
发明人：SCHLINGER WARREN G
权利人:TEXACO INC
摘要:In the partial oxidation of a sulfur- and metal-containing carbonaceous charge fuel to produce a sulfur-containing synthesis gas and metal-containing molten slag, an integrated method of charge fuel pretreatment and Claus unit tail gas sulfur removal is provided. The process of the instant invention is advantageous over other partial oxidation processes in that: (i) a fluid, molten slag which flows easily is produced, thereby improving reactor performance; and (ii) the overall removal of sulfur compounds from the synthesis gas is made simpler, more efficient, and less costly, as the need for a conventional Claus unit tail gas sulfur removal process is eliminated.

专利号:US-4671804-A
优先权日:1985-11-29
标题:Partial oxidation process
发明人：NAJJAR MITRI S
权利人:TEXACO INC
摘要:Synthesis gas is produced by the partial oxidation of a fuel feedstock comprising sulfur-containing petroleum coke and/or heavy liquid hydrocarbonaceous fuel and having a nickel and iron-containing ash in a free-flow refractory lined partial oxidation reaction zone. The production of toxic nickel subsulfide (Ni3S2) in said slag is prevented, and there is a substantial reduction in the concentration of H2S+COS in the raw product gas stream by introducing an iron-containing additive into the reaction zone along with the feed. The weight ratio of iron-containing additive to ash in the fuel feedstock is in the range of about 0.5 to 10.0. The weight ratio of iron to nickel in said mixture of iron-containing additive and fuel feedstock is greater than 0.33. The additive combines with at least a portion of the nickel and iron constituents and sulfur found in the feedstock to produce a very fluid sulfide phase of iron and nickel, and an Fe, Ni alloy phase. In another embodiment, a minor amount of a calcium compound is included with the iron-containing additive only at startup to reduce the softening temperature of the iron-containing addition agent. By this method, the molten slag produced is free from toxic Ni3S2 and has a comparatively reduced viscosity. Further, the slag may be readily removed from the gas generator at a lower temperature and may be disposed of without contaminating the environment. Further, the life of the refractory lining is extended.

专利号:US-4784670-A
优先权日:1985-11-29
标题:Partial oxidation process
发明人：NAJJAR MITRI S
权利人:TEXACO INC
摘要:Synthesis gas is produced by the partial oxidation of a feedstock comprising sulfur-containing petroleum coke and/or liquid hydrocarbonaceous fuel and having ashes that contain nickel and a comparatively low level of silicon. The production of toxic nickel subsulfide (Ni3S2) in the slag is prevented, and there is substantially no increase in the mole ratio H2S+COS/H2+CO in the raw product gas stream by introducing an additive comprising about 2 to 100 wt. % of a sulfur-containing material and any remainder comprising a supplemental iron-containing material into the reaction zone along with the feed. The additive combines with substantially all of the nickel constituents and most of the iron constituents and sulfur found in the feedstock to produce molten slag substantially comprising a fluid sulfide phase and a relatively minor amount of an Fe, Ni alloy phase. In another embodiment, a minor amount of a calcium compound is included with the additive at startup to reduce the softening temperature of the iron-containing addition agent. In still another embodiment, the additive is uniformly dispersed in sulfur-containing petroleum coke having a nickel-containing ash. By this method molten slag free from toxic Ni3 S2 and having a reduced viscosity may be readily removed from the gas generator at a lower temperature. Further, the life of the refractory lining is extended.