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Catalyst for glycerin monostearate synthesis and preparation method and application thereof

A technology of glycerol monostearate and catalyst, which is applied in the field of catalysis, can solve the problems of restricting industrial application and microwave technology restricting industrial application, and achieve the effects of green production cost, cost reduction and energy consumption, and high conversion rate

Inactive Publication Date: 2013-05-22
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent No. CN101914016A applies for a method for the rapid preparation of glycerol monostearate. This invention uses microwave radiation and solvent-free combined organic synthesis technology, which speeds up the reaction speed, simplifies the reaction process, and obtains products with high purity. However, the use of microwave technology limits its industrial application
The U.S. Patent No. US5316927A and the Canadian Patent No. CA2000143A disclose a method of using lipase as a catalyst to prepare glycerol monostearate. When using an enzyme as a catalyst, it has mild reaction conditions, high selectivity of the target product, The product has the advantages of good material properties and no pollution to the environment, but the source and cost of the enzyme limit its industrial application

Method used

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preparation example Construction

[0024] The preparation method of above-mentioned catalyst: press metal cation Co 2+ , Fe 2+ with Fe 3+ Co(NO 3 ) 2 , FeSO 4 or Fe(NO 3 ) 2 , Fe 2 (SO 4 ) 3 or Fe(NO 3 ) 3 Dissolve the metal salt in water to make a mixed solution with a total cation concentration of 0.4~2.0mol / L, and gradually add Na + NaOH solution with a concentration of 0.8~3.0mol / L to pH 7, aged for 4~8h, filtered, washed 3~5 times, dried at 40~80°C for 6~10h, and the obtained solid was calcined at 700~1000°C 2~5h, to obtain the cobalt-iron spinel of the magnetic core center, and make 80~100 mesh particles to obtain the magnetic core center. Dissolve divalent metal salts and trivalent metal salts in water at a molar ratio of divalent cations to trivalent cations of 2:1~4:1 to prepare a mixed solution Ⅰ with a total cation concentration of 1.0~3.0mol / L , NaOH and Na 2 CO 3 Dissolve in water at a molar ratio of 1:1~4:1 to make Na + Mixed solution II with a concentration of 2.0~6.0mol / L. Accor...

Embodiment 1

[0027] Weigh Co(NO 3 ) 2 ·6H 2 O4.54g, FeSO 4 ·7H2 O7.23g, Fe 2 (SO 4 ) 3 ·7H 2 O4.16g was dissolved in 65ml of water, gradually added dropwise 1.5mol / L NaOH solution to pH 7 under slow stirring at 40°C, aged for 4h, filtered, washed 3 times with water, dried at 60°C for 6h, and dried at 900°C Calcined at lower temperature for 2 hours to obtain cobalt-iron spinel, which is made into 80-mesh particles. Weigh Mg(NO 3 ) 2 ·6H 2 O3 1.05g, Al(NO 3 ) 3 9H 2 O11.25g was dissolved in 100ml water to make solution I, and NaOH13.2g was weighed, NaOH 2 CO 3 Dissolve 10.60 g in 100 ml of water to make solution II, weigh 1.82 g of cobalt-iron spinel and 100 ml of water in a four-neck flask, and add solution I and solution II to the flask dropwise under high-speed stirring at 60 ° C, and Keep the pH value at 9.5, continue to stir for 0.5 h after the dropwise addition, age for 6 h, filter, wash with water 5 times until the pH value of the filtrate is 7, dry at 70°C for 10 h, an...

Embodiment 2

[0030] Weigh Co(NO 3 ) 2 ·6H 2 O4.54g, FeSO 4 ·7H 2 O7.23g, Fe 2 (SO 4 ) 3 ·7H 2 O4.16g was dissolved in 65ml of water, gradually added dropwise 1.5mol / L NaOH solution to pH 7 under slow stirring at 40°C, aged for 4h, filtered, washed 3 times with water, dried at 60°C for 6h, and dried at 900°C Calcined at lower temperature for 2 hours to obtain cobalt-iron spinel, which is made into 80-mesh particles. Weigh ZnSO 4 ·7H 2 O14.38g, Mg(NO 3 ) 2 ·6H 2 O25.87g, Al(NO 3 ) 3 9H 2 O11.25g was dissolved in 100ml water to make solution I, and NaOH13.2g was weighed, NaOH 2 CO 3 Dissolve 10.60g in 100ml of water to make solution II, weigh 1.82g of cobalt-iron spinel and 100ml of water in a four-necked flask, and add solution I and solution II to the flask dropwise under high-speed stirring at 60°C, and Keep the pH value at 9.5, continue to stir for 0.5 h after the dropwise addition, age for 6 h, filter, wash with water 5 times until the pH value of the filtrate is 7, dry...

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Abstract

The invention discloses a hydrotalcite catalyst for preparing glycerin monostearate and a preparation method thereof. The catalyst has a magnetic core-shell structure and is specially used for exchange reaction between methyl stearate and glyceride to prepare glycerin monostearate. The magnetic core center of the catalyst is ferrocobalt spinel, the shell component is rehydrated bimetal hydrotalcite or trimetal hydrotalcite with a lamellar structure and the structure conforms to the general formula [M<2+>xAl<3+>y(OH)2] [OH<->]2x+3y-2.mH2O, wherein M<2+> is one or two of divalent metals such as magnesium, zinc, calcium, copper and nickel; x:y is (2:1)-(4:1); x is 3-8; and y is 1-3. The solid catalyst is efficient and nontoxic, is environment-friendly and has good effect of separation from the product after reaction.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to a catalyst for preparing glycerol monostearate with multifunctional uses through the transesterification reaction of methyl stearate and glycerin. Background technique [0002] Glyceryl monostearate (monoglyceride for short) is an important nonionic surfactant with good emulsifying properties. Monoglycerides are commonly used emulsifiers in the food industry and in the manufacture of daily chemicals and pharmaceutical products. In textile industry, monoglyceride can be used as fiber finishing agent, softener and sizing agent; in plastic industry, monoglyceride can be used as internal lubricant of PVC; in polymer processing, monoglyceride can be used as polyethylene, poly Antistatic agent and plasticizer for processing propylene and foamed polyethylene. [0003] At present, the industrialized production of monoglycerides mostly adopts two technological routes of di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J23/80B01J23/78C07C69/30C07C67/03
Inventor 肖国民周路洪梅高李璟顾怡
Owner SOUTHEAST UNIV
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