Sheet catalyst for synthesis of dimmer acid ester and preparation method thereof
Technical Field The present invention relates to a method for preparing the catalyst, in particular to a sheet used for synthetic dimerization acid ester catalyst and method for preparing the same. Background Art Synthesis of dimeric acid ester generally 200 item of activeness shirato or mongolian earth as catalyst, the catalytic activity is better, the reaction temperature is the 180-260 [...] , however, difficult to separate catalyst and product, the product is entrained multi-, catalyst regeneration difficult. Existing literature (opens the woods. Synthesis of dimer acid and industrial application. Fine petrochemical industry, 1995, (6): 71-75) pointed out that shirato catalytic process is shirato to occluding a certain amount of polymeric acid, loss of product caused by the discarding shirato not, but will lead to environmental pollution. After retrieval, not see the relevant synthetic two gathers the diethylene glycol dinitrate catalyst and its preparation method of Chinese invention Patent; on the other, will not see by treating the sheet-like synthetic dimerization acid ester catalyst and method for preparing the same foreign Patent for invention. Content of the invention The purpose of this invention is to overcome the deficiency of the above-mentioned catalyst, to provide a sheet used for synthetic dimerization acid ester catalyst and method for preparing the same. Catalyst preparation method of this invention is simple and easy; the catalyst activity is good, high strength, catalyst and the product is easy to separate, the product is entrained few, easy regeneration of catalyst. Realize the above-mentioned purpose the technical proposal: The activated clay through activating treatment, the same into powder, particle size is 150-250 mesh. In accordance with the active shirato 65-85%, cocatalyst 2-10%, the rubber mounts makes Kong Ji 13-25% quality ratio, after the raw materials are uniformly mixed, is formed adopting the sheeter preforming, by 105 the oven dried under [...] , then 300-400 the roasting under [...] , the roasting time not less than 3 hours. Final cooling, packaging, to obtain the used for synthetic dimerization acid ester of flaky catalyst. The flaky catalyst, which is characterized in that: the active shirato, cocatalyst, adhesive making a pore, wherein, the mass ratio is: active shirato 65-85%, cocatalyst 2-10%, glue mounts makes Kong Ji 13-25% ; the catalyst promoter is an alkali metal or alkaline earth metal oxide, an alkali metal or alkaline earth metal hydroxide, alkali metal or alkaline earth metal salt thereof, which comprises: NaOH, KOH, MgO, CaO, BaO, potassium carbonate, sodium carbonate, sodium sulfate, lithium carbonate, magnesium chloride, and the like of any of the complex of one or more. The above-mentioned scheme the the rubber mounts makes Kong Ji is water. The beneficial effect of the invention is: The present invention is directed to powder active clay catalyst entrained product, product disadvantages of difficult separation with the catalyst, the catalyst is prepared tablet, is easily separated from the catalyst the product, product entrainment reduction of 45% or more; by adding a cocatalyst effectively improve the reaction activity and selectivity of the catalyst; and adding glue mounts makes Kong Ji , and of the catalyst is not only beneficial to the improvement of the mechanical strength, but also increase pore volume of the catalyst, chemical reaction so as to provide more of the reaction surface. Mode of execution Embodiment 1 To fetch the granularity 150-250 target active shirato 74 g, cocatalyst NaOH 7.5 g, water 18.5 g (mass proportion is: active shirato 74%, NaOH7 . 5%, water 18.5%), after mixing the same, the tablet presser ф 5 × 5 mm tablet. The can 105 under [...] 12 hours drying, the 400 the roasting under [...] 3 hours, flaky catalyst is obtained after cooling, the spare. The 100 grams of fatty acid methyl ester, mixed raw materials, 11 grams of the above-mentioned flaky catalyst, by adding 250 ml is provided with a condensing tube, thermometer and stirrer of the three-port flask, in 250 the reaction under [...] 8 hours. The end of reaction, flaky catalyst basically intact, the product is easy to be separated, dimer acid methyl ester in the yield of 71.0%. With the same quantity of a powdered active clay catalyst, improve product yield 9.0%. Embodiment 2 To fetch the granularity 150-250 target active shirato 75 grams, cocatalyst CaO 5 grams, water 20 g, (mass proportion is: active shirato 75%, CaO 5%, water 20%), after mixing the same, the tablet presser ф 5 × 5 mm tablet. The can 105 under [...] 12 hours drying, the 400 the roasting under [...] 3 hours, flaky catalyst is obtained after cooling, the spare. The 100 grams of mixed raw material fatty acid methyl ester, 10 grams of the above-mentioned flaky catalyst, by adding 250 ml is provided with a condensing tube, thermometer and stirrer of the three-port flask, in 250 the reaction under [...] 8 hours. The end of reaction, flaky catalyst basically intact, the product is easy to be separated, dimer acid methyl ester in the yield of 66.0%. With the same quantity of a powdered active clay catalyst, improving the product yield of 8.5%. Embodiment 3 To fetch the granularity 150-250 target active shirato 75 grams, cocatalyst potassium carbonate 2.5 g, water 22.5 grams, (mass proportion is: active shirato 75%, potassium carbonate 2.5%, water 22.5%), after mixing the same, the tablet presser ф 5 × 5 mm tablet. The can 105 under [...] 12 hours drying, the 400 the roasting under [...] 3 hours, flaky catalyst is obtained after cooling, the spare. The 100 grams of fatty acid methyl ester, mixed raw materials, 9 grams of the above-mentioned flaky catalyst, by adding 250 ml is provided with a condensing tube, thermometer and stirrer of the three-port flask, in 250 the reaction under [...] 8 hours. The end of reaction, flaky catalyst basically intact, the product is easy to be separated, dimer acid methyl ester in the yield of 63.3%. With the same quantity of a powdered active clay catalyst, improve product yield 8.0%. A novel flaky catalyst for synthesizing a dimmer acid ester consists of activated clay, a promoter and an adhesive pore-forming agent, wherein the activated clay accounts for 65-85 percent, the promoter accounts for 2-10 percent, and the adhesive pore-forming agent accounts for 13-25 percent. The preparation method for the catalyst comprises the following steps of: preparing the powder of the activated clay with a particle size of 150-250 meshes; mixing the raw materials evenly according to the partition ratio; tabletting and forming; drying the mixture at 105 DEG C; calcining the mixture at 300-400 DEG C; and cooling down and packaging the mixture. The method is simple and feasible. The catalyst which has good activity and high strength is easy to be separated from products with less products carried. In addition, the catalyst is easy to be regenerated. 1. A sheet used for synthetic dimerization acid ester preparation method of the catalyst, its characteristic is to include the following steps: (1) the active white home-made into powder, particle size is 150-250 mesh; (2) the active shirato 65-85%, cocatalyst 2-10%, glue mounts makes Kong Ji 13-25% match the quality of the raw materials are uniformly mixed; (3) sheeting formation; (4) the 105 under [...] drying; (5) the 300-400 [...] baking, roasting time is 3 hours or more; (6) cooling, packaging. 2. Preparation method for the synthesis of a flaky catalyst according to Claim 1 dimerization acid ester, which is characterized in that: the active shirato, cocatalyst, adhesive making a pore, wherein, the mass ratio is: active shirato 65-85%, cocatalyst 2-10%, glue mounts makes Kong Ji 13-25% ; the catalyst promoter is an alkali metal or alkaline earth metal oxide, an alkali metal or alkaline earth metal hydroxide, alkali metal or alkaline earth metal salt thereof, which comprises: NaOH, KOH, MgO, CaO, BaO, potassium carbonate, sodium carbonate, sodium sulfate, lithium carbonate, magnesium chloride and its complex; the states the rubber to mount makes Kong Ji is water.