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 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.