Hydroconversion multi-metallic catalyst and method for making thereof
First Claim
1. A process for forming a bulk hydroprocessing catalyst with minimal amount of metals to waste treatment, the method comprising:
- co-precipitating at reaction conditions at least one of a Group VIB metal precursor feed and at least a Promoter metal precursor feed selected from Group VIII, Group IIB, Group IIA, Group IVA and combinations thereof, to form a mixture comprising a catalyst precursor, wherein the reaction conditions comprise a temperature between 25-350°
C. and a pressure between 0 to 3000 psig and a pH of 0-12;
isolating the catalyst precursor from the mixture, forming a supernatant containing at least a Promoter metal residual and at least a Group VIB metal residual in an amount of at least 10 mole % of the metal precursor feeds;
treating the supernatant by any of chemical precipitation, ion exchange, electro-coagulation, and combinations thereof to generate at least a metal precursor feed and a first effluent stream containing less than 50 mole % of metal ions in at least one of the metal residuals;
treating the first effluent stream to recover at least 80 mol % of the metal ions in the first effluent stream to form at least a metal precursor feed;
recycling the at least a metal precursor feed formed by treating the first effluent stream to the co-precipitating step; and
sulfiding the catalyst precursor forming the bulk catalyst,wherein an effluent stream from the process to waste treatment contains less than 50 ppm metal ions.
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Abstract
In a process for forming a bulk hydroprocessing catalyst by sulfiding a catalyst precursor made in a co-precipitation reaction, up to 60% of the metal precursor feeds do not react to form catalyst precursor and end up in the supernatant. In the present disclosure, the metals can be recovered via any of chemical precipitation, ion exchange, electro-coagulation, and combinations thereof to generate an effluent stream containing less than 50 mole % of metal ions in at least one of the metal residuals, and for at least one of the metal residuals is recovered as a metal precursor feed, which can be recycled for use in the co-precipitation reaction. An effluent stream from the process to waste treatment contains less than 50 ppm metal ions.
154 Citations
27 Claims
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1. A process for forming a bulk hydroprocessing catalyst with minimal amount of metals to waste treatment, the method comprising:
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co-precipitating at reaction conditions at least one of a Group VIB metal precursor feed and at least a Promoter metal precursor feed selected from Group VIII, Group IIB, Group IIA, Group IVA and combinations thereof, to form a mixture comprising a catalyst precursor, wherein the reaction conditions comprise a temperature between 25-350°
C. and a pressure between 0 to 3000 psig and a pH of 0-12;isolating the catalyst precursor from the mixture, forming a supernatant containing at least a Promoter metal residual and at least a Group VIB metal residual in an amount of at least 10 mole % of the metal precursor feeds; treating the supernatant by any of chemical precipitation, ion exchange, electro-coagulation, and combinations thereof to generate at least a metal precursor feed and a first effluent stream containing less than 50 mole % of metal ions in at least one of the metal residuals; treating the first effluent stream to recover at least 80 mol % of the metal ions in the first effluent stream to form at least a metal precursor feed; recycling the at least a metal precursor feed formed by treating the first effluent stream to the co-precipitating step; and sulfiding the catalyst precursor forming the bulk catalyst, wherein an effluent stream from the process to waste treatment contains less than 50 ppm metal ions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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Specification