Low-corrosivity catalyst
A catalyst and corrosive technology, applied in the field of low corrosive catalysts, can solve problems such as equipment corrosion, harsh time conditions, and high production costs, and achieve the effects of improving production efficiency, improving catalytic activity, and shortening time
Inactive Publication Date: 2019-04-02
徐州伯利恒生物科技有限公司
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AI Technical Summary
Problems solved by technology
Concentrated sulfuric acid is often used as a catalyst in industrial synthesis. These catalysts are cheap and easy to obtain, but they severely corrode equipment and cause cross-linking and deterioration of glycolic acid. However, some existing processes take a long time and have harsh conditions. For mass production of glycolic acid Butyl ester is extremely unfavorable, and production cost is higher, and the yield and the purity of product do not reach the requirement of practical application, therefore, need to develop new synthetic technique and method, reduce catalyst to the corrosion of production equipment, shorten process time, simplify separation and Purification process, thereby improving the market competitiveness of the product
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0014] A kind of low corrosion catalyst preparation method comprises the following steps:
[0015] Step 1. Put 200 g of kaolin carrier particles into a vacuum dryer, and vacuumize for 1 hour, so that the vacuum degree in the vacuum dryer is -0.09Mpa;
[0016] Step 2, take 10g Co (NO 3 ) 2 ·6H 2 0 and 8g urea, then added to the mixed solvent of 250ml deionized water and 150ml ethanol, magnetically stirred for 20min to premix;
[0017] Step 3. Add 10ml of 98% concentrated sulfuric acid to the above premix for acidification, continue to stir at room temperature for 10h, transfer to a hydrothermal kettle, and react at 140°C for 10h to obtain CoSO 4 acidified mixture;
[0018] Step 4, transfer the dried kaolin to a vacuum impregnation machine, control the speed at 2.5r / min and continue to add the above acidified mixed solution, and rotate for 1 hour, so that the solution and the kaolin carrier are repeatedly and fully mixed;
[0019] Step 5, after the end, use compressed nitro...
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The invention discloses a low-corrosivity catalyst. The catalyst is used for catalyzing glycolic acid and n-butanol to prepare butyl glycolate. A hydrothermal reaction and uniform dispersion are performed on kaolin and acidified active cobalt sulfate so as to obtain the high-activity reusable solid catalyst, and the high-activity reusable solid catalyst is used for catalyzing an esterification reaction of glycolic acid and n-butanol so as to obtain the high-purity butyl glycolate. When the catalytic effect of the catalyst is compared with catalysis of concentrated sulfuric acid, on the premiseof ensuring high yield, not only can the corrosion to equipment be reduced, but also the preparation time of the finished product can be shortened greatly, so that the production efficiency is improved.
Description
technical field [0001] The present invention relates to a low corrosion catalyst. Background technique [0002] Butyl glycolate (CAS: 7397-62-8) molecule contains active α-H and hydroxyl, ester groups, etc., so it has the properties of active α-H, alcohol and ester, which makes butyl glycolate It is widely used and has been used in the synthesis of paints and antibacterial drug intermediates. Concentrated sulfuric acid is often used as a catalyst in industrial synthesis. These catalysts are cheap and easy to obtain, but they are severely corrosive to equipment and cause cross-linking and deterioration of glycolic acid. However, some existing processes take a long time and have harsh conditions. For mass production of glycolic acid Butyl ester is extremely unfavorable, and production cost is higher, and the yield and the purity of product do not reach the requirement of practical application, therefore, need to develop new synthetic technique and method, reduce catalyst to t...
Claims
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IPC IPC(8): B01J27/053C07C67/08C07C69/675
CPCB01J27/053C07C67/08C07C69/675
Inventor 杜尚威田家乐
Owner 徐州伯利恒生物科技有限公司