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Применить Всего найдено 4. Отображено 4.
15-06-2011 дата публикации

Beta-diketone 1-(3,5-dibenzyloxy)phenyl-5-phenylacetylacetone and preparation method thereof

Номер: CN0102093192A
Автор: HONGFANG JIU, LIXIN ZHANG, GUODE LIU, ZHIJING ZHANG, YUANZHONG WANG, YUEHUA FU, JIU HONGFANG, ZHANG LIXIN, LIU GUODE, ZHANG ZHIJING, WANG YUANZHONG, FU YUEHUA
Принадлежит:

The invention discloses a beta-diketone 1-(3,5-dibenzyloxy)phenyl-5-phenylacetylacetone and a preparation method thereof, and relates to a preparation method of a beta-diketone. The invention solves the problems of complex steps and low yield in the synthesis of beta-diketone compounds in the prior art, and the problems of low solubility and low thermal stability of the prepared beta-diketone compounds. In the invention, polyhydroxy phenol 3,5-dihydroxybenzoic acid, methanol, benzyl bromide and hypnone are used as raw materials, and the Claisen ketone ester condensation principle is utilized; and under the action of strong base (sodium ethylate), a ketone (hypnone) with active hydrogen reacts with a corresponding ester (3,5-benzyloxymethyl benzoate) to prepare the beta-diketone compound. The beta-diketone 1-(3,5-dibenzyloxy)phenyl-5-phenylacetylacetone has the advantages of large conjugated structure, high rigidity, high thermal stability, excellent solubility and the like, and has a potential ...

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Номер записи: 1
11-01-2012 дата публикации

Method for preparing soft magnetic Ni-Zn ferrite nano materials

Номер: CN0101696108B
Автор: ZHANG LIXIN, JIU HONGFANG, SUN YIXIN, HAN XINGWEI, CHENG HUAN, FAN TAO, LIU GUODE, LIXIN ZHANG, HONGFANG JIU, YIXIN SUN, XINGWEI HAN, HUAN CHENG, TAO FAN, GUODE LIU
Принадлежит:

The invention relates to a technique for preparing inorganic nano materials, in particular to a method for preparing a soft magnetic Ni-Zn ferrite nano material, which has mild reaction condition, is easy to control and can prepare the soft magnetic NI-Zn ferrite nano material with favorable dispersity and uniform grain diameter distribution. The method comprises the following steps of firstly, preparing a mixed salt solution by using Fe3+: Zn2+: Ni2+, then preparing emulsion by using the mass of Tween 80: n-amyl alcohol: cyclohexane, then dropwise adding the mixed salt solution to prepare aninverse micro-emulsion; secondly, dropwise adding a precipitant of NaOH solution to the micro-emulsion for deposition, ageing the micro-emulsion, demulsifying by using acetone, washing, drying and sintering to obtain the needed product. The invention has the advantages of easily obtained materials, low cost, simple operation, simple and convenient apparatus as well as high purity, high yield, high saturation ...

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Номер записи: 2
20-06-2012 дата публикации

Beta-diketone 1-(3,5-dibenzyloxy)phenyl-5-phenylacetylacetone and preparation method thereof

Номер: CN0102093192B
Автор: JIU HONGFANG, ZHANG LIXIN, LIU GUODE, ZHANG ZHIJING, WANG YUANZHONG, FU YUEHUA, HONGFANG JIU, LIXIN ZHANG, GUODE LIU, ZHIJING ZHANG, YUANZHONG WANG, YUEHUA FU
Принадлежит:

The invention discloses a beta-diketone 1-(3,5-dibenzyloxy)phenyl-5-phenylacetylacetone and a preparation method thereof, and relates to a preparation method of a beta-diketone. The invention solves the problems of complex steps and low yield in the synthesis of beta-diketone compounds in the prior art, and the problems of low solubility and low thermal stability of the prepared beta-diketone compounds. In the invention, polyhydroxy phenol 3,5-dihydroxybenzoic acid, methanol, benzyl bromide and hypnone are used as raw materials, and the Claisen ketone ester condensation principle is utilized;and under the action of strong base (sodium ethylate), a ketone (hypnone) with active hydrogen reacts with a corresponding ester (3,5-benzyloxymethyl benzoate) to prepare the beta-diketone compound. The beta-diketone 1-(3,5-dibenzyloxy)phenyl-5-phenylacetylacetone has the advantages of large conjugated structure, high rigidity, high thermal stability, excellent solubility and the like, and has a potential ...

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Номер записи: 3
21-04-2010 дата публикации

Method for preparing soft magnetic Ni-Zn ferrite nano materials

Номер: CN0101696108A
Автор: Zhang Lixin, Jiu Hongfang, Sun Yixin, Han Xingwei, Cheng Huan, Fan Tao, Liu Guode
Принадлежит:

The invention relates to a technique for preparing inorganic nano materials, in particular to a method for preparing a soft magnetic Ni-Zn ferrite nano material, which has mild reaction condition, is easy to control and can prepare the soft magnetic NI-Zn ferrite nano material with favorable dispersity and uniform grain diameter distribution. The method comprises the following steps of firstly, preparing a mixed salt solution by using Fe3+: Zn2+: Ni2+, then preparing emulsion by using the mass of Tween 80: n-amyl alcohol: cyclohexane, then dropwise adding the mixed salt solution to prepare an inverse micro-emulsion; secondly, dropwise adding a precipitant of NaOH solution to the micro-emulsion for deposition, ageing the micro-emulsion, demulsifying by using acetone, washing, drying and sintering to obtain the needed product. The invention has the advantages of easily obtained materials, low cost, simple operation, simple and convenient apparatus as well as high purity, high yield, high ...

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Номер записи: 4