Aluminum hydroxide powder and preparation method thereof

• Main Authors: JIANG YUANLI, CUI FAKE, ZHANG HONGBO, LI ZONGYAO, WEI LINGCHAO, LIU JIAOPING, ZHANG JIANPING, LI ZHUANG, ZHAO SUHANG
• Format: Patent
• Language: Chinese; English
• Published: 04.03.2022
• Subjects: ACYCLIC OR CARBOCYCLIC COMPOUNDS; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; INORGANIC CHEMISTRY; METALLURGY; ORGANIC CHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

The invention discloses a preparation method of aluminum hydroxide powder for a dimethyl oxalate synthesis catalyst carrier, which takes an industrial sodium aluminate solution as a raw material, and comprises the following steps: purifying the sodium aluminate solution to remove iron, separating a reaction base solution through a precipitation reaction, adding acid to reduce sodium, performing phase conversion, and obtaining the aluminum hydroxide powder. According to the method, the industrial sodium aluminate solution of an aluminum oxide enterprise is used as a raw material, the solution containing ammonium ions and bicarbonate ions or carbonate ions is used as a precipitator, dawsonite is generated through a precipitation reaction, then acid is added to remove sodium, phase conversion is performed, and the aluminum hydroxide for the dimethyl oxalate synthesis catalyst carrier is prepared. The aluminum hydroxide powder is low in cost. 本发明公开了一种草酸二甲酯合成催化剂载体用氢氧化铝粉体的制备方法，以工业铝酸钠溶液为原料，包括以下步骤：铝酸钠溶液净化除铁、沉淀反应将反应底液