CN102503782A - Method for preparing dipentaerythritol through dipentaerythritol powder - Google Patents
Method for preparing dipentaerythritol through dipentaerythritol powder Download PDFInfo
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- CN102503782A CN102503782A CN2011103481368A CN201110348136A CN102503782A CN 102503782 A CN102503782 A CN 102503782A CN 2011103481368 A CN2011103481368 A CN 2011103481368A CN 201110348136 A CN201110348136 A CN 201110348136A CN 102503782 A CN102503782 A CN 102503782A
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- dipentaerythritol
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- soft water
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Abstract
The invention discloses a method for preparing dipentaerythritol through dipentaerythritol powder, belonging to preparation method of dipentaerythritol. The method comprises the following steps of: adding the dipentaerythritol powder in soft water, heating the soft water and guaranteeing the specific gravity of the solution to 1.033-1.035 at 35 DEG C; continuously heating to 70 DEG C, adding 1% of active carbon powder, heating to 100 DEG C and holding for 13-17 min; circularly filtering the solution until the active carbon powder or foreign pigment in the filtrate is completely removed; cooling the filtrate to 38+/-1 DEG C at a speed of 8-10 DEG C per hour, and filtering the crystals; dewatering the crystals by a centrifuge and drying the same. The method of the invention has the advantages of not only recycling large amount of waste dipentaerythritol powder, but also relieving the environmental pollution of dipentaerythritol powder, and having small energy consumption, simple technique and low processing cost; and the invention provides a method for preparing dipentaerythritol.
Description
Technical field
The present invention relates to a kind of method for preparing NSC 65881, relating in particular to a kind of is the method for feedstock production NSC 65881 with the NSC 65881 powder.
Background technology:NSC 65881 is an important source material of making lubricating oil and fire resistant electric wire insulation layer, is in great demand both at home and abroad, and price rises steadily.Yet, in producing the NSC 65881 process, can produce a large amount of NSC 65881 powder, also can't effectively handle in addition or utilize the stacking of can only leaving unused at present it; Waste, but also contaminate environment had not only been caused.If can a large amount of NSC 65881 powder of depleted in the NSC 65881 process be processed the NSC 65881 finished product through simple processing treatment, can produce bigger economic benefit and social benefit undoubtedly.
Summary of the invention:In order to overcome the defective that exists in the prior art, the present invention aims to provide a kind of method of utilizing NSC 65881 powdered preparation NSC 65881; This method not only can turn waste into wealth, produce bigger economic benefit, and can also bring good social benefit.
To achieve these goals, the technical scheme concrete steps of the present invention's employing are following:
1) the NSC 65881 powder is dissolved in the soft water, solution proportion is 1.033～1.035 when guaranteeing to be heated to 35 ℃;
2) continue to be heated to 70 ℃, adding weight is the activity charcoal powder of NSC 65881 powder 0.2～1%, continues to be heated to 100 ℃ again, is incubated 13～17 minutes;
The solution circulated that 3) will be added with activity charcoal powder is filtered, and activity charcoal powder or foreign pigment in filtrating are removed fully;
4) with above-mentioned filtrating cooling 1 hour, add soft water then and be cooled to 38 ± 1 ℃, filtering for crystallizing body, 8～10 ℃/hour of control rate of temperature fall;
5) above-mentioned xln is used centrifuge dewatering, washed 2～3 minutes with soft water during dehydration;
6) xln after the centrifuge dehydration is carried out drying.
Compare with prior art; The present invention is owing to adopted technique scheme; With original depleted NSC 65881 powder is raw material, and the processing through operations such as heat of solution, absorption, filtration, decrease temperature crystalline, centrifuge dehydration, dryings can obtain purity and be higher than 90% NSC 65881 finished product; Therefore not only can depleted NSC 65881 powder be turned waste into wealth, obtain bigger economic benefit; And alleviated of the pollution of NSC 65881 powder to environment.The present invention have power consumption less, technology and characteristics such as required equipment is simple, tooling cost is low.
Embodiment:Embodiment below in conjunction with concrete is described further the present invention, and its concrete steps are following:
1) soft water is injected reaction kettle, add the NSC 65881 powder, heating for dissolving; The solution ratio weighs 1.033～1.035 when guaranteeing temperature to 35 ℃;
2) continue to be heated to 70 ℃, adding weight is the activity charcoal powder of NSC 65881 powder 0.2～1%, continues to be heated to 100 ℃ again, is incubated 13～17 minutes;
The solution that 3) will be added with activity charcoal powder is used the pressure filter circulating filtration, and activity charcoal powder or foreign pigment in filtrating are removed fully;
4), send into and add soft water in the crystallizer and be cooled to 38 ± 1 ℃, filtering for crystallizing body, 8～10 ℃/hour of control rate of temperature fall with above-mentioned filtrating cooling 1 hour;
5) above-mentioned xln is used centrifuge dewatering, washed 2～3 minutes with soft water during dehydration;
6) xln after will dewatering takes out, drying; Promptly get the NSC 65881 finished product.
Claims (1)
1. method of utilizing NSC 65881 powdered preparation NSC 65881 is characterized in that concrete steps are following:
1) the NSC 65881 powder is dissolved in the soft water, solution proportion is 1.033～1.035 when guaranteeing to be heated to 35 ℃;
2) continue to be heated to 70 ℃, adding weight is the activity charcoal powder of NSC 65881 powder 0.2～1%, continues to be heated to 100 ℃ again, is incubated 13～17 minutes;
The solution circulated that 3) will be added with activity charcoal powder is filtered, and activity charcoal powder or foreign pigment in filtrating are removed fully;
4) with above-mentioned filtrating cooling 1 hour, add soft water then and be cooled to 38 ± 1 ℃, filtering for crystallizing body, 8～10 ℃/hour of control rate of temperature fall;
5) above-mentioned xln is used centrifuge dewatering, washed 2～3 minutes with soft water during dehydration;
6) xln after the centrifuge dehydration is carried out drying.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103481368A CN102503782A (en) | 2011-11-07 | 2011-11-07 | Method for preparing dipentaerythritol through dipentaerythritol powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103481368A CN102503782A (en) | 2011-11-07 | 2011-11-07 | Method for preparing dipentaerythritol through dipentaerythritol powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102503782A true CN102503782A (en) | 2012-06-20 |
Family
ID=46215933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103481368A Pending CN102503782A (en) | 2011-11-07 | 2011-11-07 | Method for preparing dipentaerythritol through dipentaerythritol powder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102503782A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB772574A (en) * | 1954-05-27 | 1957-04-17 | Celanese Corp | Separation of mixtures of pentaerythritol and dipentaerythritol |
| CN101012156A (en) * | 2007-02-13 | 2007-08-08 | 濮阳市永安化工有限公司 | Process of preparing dipentaerythritol and/or tripentaerythritol |
| CN101696158A (en) * | 2009-09-30 | 2010-04-21 | 濮阳市鹏鑫化工有限公司 | Method for preparing pentaerythritol and dipentaerythritol |
| CN102070413A (en) * | 2010-12-23 | 2011-05-25 | 安徽金禾实业股份有限公司 | Method for synthesizing dipentaerythritol |
-
2011
- 2011-11-07 CN CN2011103481368A patent/CN102503782A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB772574A (en) * | 1954-05-27 | 1957-04-17 | Celanese Corp | Separation of mixtures of pentaerythritol and dipentaerythritol |
| CN101012156A (en) * | 2007-02-13 | 2007-08-08 | 濮阳市永安化工有限公司 | Process of preparing dipentaerythritol and/or tripentaerythritol |
| CN101696158A (en) * | 2009-09-30 | 2010-04-21 | 濮阳市鹏鑫化工有限公司 | Method for preparing pentaerythritol and dipentaerythritol |
| CN102070413A (en) * | 2010-12-23 | 2011-05-25 | 安徽金禾实业股份有限公司 | Method for synthesizing dipentaerythritol |
Non-Patent Citations (1)
| Title |
|---|
| 滕冬成: "双季戊四醇重结晶新工艺的研究", 《精细化工中间体》 * |
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Application publication date: 20120620 |