36results about How to "Physical and chemical properties are different" patented technology

The invention discloses a preparation method for a catalyst used in preparation of low-carbon olefin from synthetic gas. The preparation method comprises the following steps: (1) subjecting an alumina carrier to equivalent-volume saturated impregnation of an acidic solution containing sugar, then drying the alumina carrier until the adsorption quantity of the acidic solution containing sugar is 30 to 60% of the saturated solution absorption quantity of the alumina carrier and carrying out ageing, drying and roasting so as to obtain a modified alumina carrier; (2) impregnating the modified alumina carrier prepared in the step (1) in a zinc salt solution by using a nonsaturated impregnation method and then carrying out drying and roasting; (3) impregnating the roasted carrier in the step (2) with a wetting solution containing an adsorbent by using the nonsaturated impregnation method; and (4) subjecting the adsorbent-containing carrier obtained in the step (3) to saturated co-impregnation of a mixed solution containing active metal iron, an auxiliary agent manganese and an auxiliary agent potassium after drying and carrying out drying and roasting so as to obtain the catalyst used in preparation of low-carbon olefin from synthetic gas. The catalyst has the characteristics of long-cycle operation activity and high stability and is beneficial for industrial application and promotion.

The invention discloses a catalyst for producing olefin by hydrogenation of CO and a preparation method thereof. The preparation of the catalyst comprises the following steps: (1) an aluminum oxide carrier is treated by isovolumetric saturated impregnation with an acidic solution of sugar; (2) a mixed aqueous solution of nickel salt and gallium salt is prepared, and the modified aluminum oxide carrier prepared in the step (1) is treated by impregnation with the mixed aqueous solution by a nonsaturated impregnation method; (3) wetting liquid containing an adsorbent is used for impregnation of the carrier after calcination in step (2) by using a nonsaturated impregnation method; (4) the carrier containing the adsorbent in the step (3) is treated by impregnation with a solution containing active metal iron, drying and calcination are carried out, a metal auxiliary agent is used for impregnation, and drying and calcination are carried out in order to obtain the catalyst for producing light olefin from synthetic gas. The catalyst has the characteristics of long-time cycle running as well as high activity and stability, and the catalyst is good for industrial application and promotion.

The invention discloses a preparation method of a catalyst for producing low-carbon olefins from syngas, which comprises the following steps: (1) using alumina as a carrier to impregnate a zinc salt solution by an unsaturated impregnation method, drying and roasting; (2) using an unsaturated impregnation method Impregnate the roasted carrier in step (1) with the wetting solution containing the adsorbent; (3) dry and saturate the carrier containing the adsorbent in step (2) and co-impregnate the mixture containing active metal iron, manganese and potassium as additives The solution is dried and calcined, then unsaturated sprayed and impregnated with the metal additive potassium solution, and then dried and calcined to obtain a catalyst for preparing low-carbon olefins from synthesis gas. The catalyst has the characteristics of high activity and stability in long-period operation, and is beneficial to industrial application and popularization.

The invention discloses a preparation method of a catalyst for producing low-carbon olefins from synthesis gas, which comprises the following steps: (1) using alumina as a carrier to impregnate a zinc salt solution by an unsaturated impregnation method, drying and roasting; (2) using an unsaturated impregnation method Impregnate the calcined carrier in step (1) with a wetting solution containing an adsorbent, wherein the adsorbent is an organic amine with a carbon number of 2 to 15, and the amount of the adsorbent added accounts for 1%~10% of the weight of the carrier; (3) Step (2) The carrier containing the adsorbent is dried and impregnated with a solution containing active metal iron and additive manganese, and after drying and roasting, it is unsaturated sprayed and impregnated with the metal additive Potassium, and then dried and roasted to obtain a low-carbon olefin catalyst from synthesis gas. The catalyst has the characteristics of high activity and stability in long-period operation, and is beneficial to industrial application and popularization.

The invention discloses a preparation method for a catalyst used in preparation of low-carbon olefin from synthetic gas. The preparation method comprises the following steps: (1) subjecting an alumina carrier to equivalent-volume saturated impregnation of an aqueous solution of an organic compound containing nitrogen, then drying the alumina carrier until the adsorption quantity of the aqueous solution of the organic compound containing nitrogen is 30 to 60% of the saturated solution absorption quantity of the alumina carrier and carrying out ageing, drying and roasting so as to obtain a modified alumina carrier; (2) impregnating the modified alumina carrier prepared in the step (1) in a zinc salt solution by using a nonsaturated impregnation method and then carrying out drying and roasting; (3) impregnating the roasted carrier in the step (2) with a wetting solution containing an adsorbent by using the nonsaturated impregnation method; and (4) impregnating the adsorbent-containing carrier obtained in the step (3) in a solution containing active metal iron and an auxiliary agent manganese and carrying out drying and roasting so as to obtain the catalyst used in preparation of low-carbon olefin from synthetic gas. The catalyst has the characteristics of long-cycle operation activity and high stability and is beneficial for industrial application and promotion.

The invention discloses a preparation method of a catalyst for producing low-carbon olefins from syngas, which comprises the following steps: (1) The alumina carrier is equal-volume saturated and impregnated with a buffer solution containing ammonium salt, and dried until the adsorption amount of the buffer solution containing ammonium salt is oxidized The aluminum carrier absorbs 30-60% of the saturated solution, and then the modified alumina carrier is obtained after aging, drying and roasting; (2) The modified alumina carrier prepared in step (1) is impregnated with zinc salt by unsaturated impregnation method solution, dried and then calcined; (3) using unsaturated impregnation method to impregnate the carrier after step (2) roasting with the wetting solution containing the adsorbent; (4) step (3) the carrier containing the adsorbent to be saturated and co-impregnated A mixed solution containing active metal iron, additive manganese and additive potassium is dried and calcined to prepare a catalyst for producing low-carbon olefins from syngas. The catalyst has the characteristics of high activity and stability in long-period operation, and is beneficial to industrial application and popularization.

The invention discloses a method for preparing an iron-based catalyst, which comprises the following steps: (1) preparing a mixed aqueous solution of nickel salt and gallium salt, using alumina as a carrier to impregnate the mixed aqueous solution by an unsaturated impregnation method; (2) using an unsaturated The impregnation method impregnates the carrier after step (1) roasting with the wetting solution containing the adsorbent; (3) the carrier containing the adsorbent in step (2) is dried and then saturated and co-impregnated with active metal iron, manganese and potassium as additives The mixed solution is dried and calcined, and then unsaturated sprayed and impregnated with the metal additive potassium solution, and then dried and calcined to obtain a low-carbon olefin catalyst for syngas production. The catalyst has the characteristics of high activity and stability in long-period operation, and is beneficial to industrial application and popularization.