CN1067970C - High aspect ratio saccharide continuous hydrogenation process and its equipment - Google Patents
High aspect ratio saccharide continuous hydrogenation process and its equipment Download PDFInfo
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- CN1067970C CN1067970C CN97103695A CN97103695A CN1067970C CN 1067970 C CN1067970 C CN 1067970C CN 97103695 A CN97103695 A CN 97103695A CN 97103695 A CN97103695 A CN 97103695A CN 1067970 C CN1067970 C CN 1067970C
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Abstract
The present invention relates to a continuous hydrogenating process for preparing sugar alcohol, which adopts seamless stainless steel pipes or welded stainless steel pipes as reaction columns. A plurality of reaction columns are connected in series to obtain the ratio of height to diameter over 100 to 1. The granularity of catalyst is from 11MM to 25MM. The present invention has the advantages of simple preparing process and good sealing performance. The seamless stainless steel pipes or the welded stainless steel pipes with corresponding diameters are adopted and additionally provided with flanges. High ratio of height to diameter makes more contact chance between sugar liquid, hydrogen and catalyst and increases the catalytic effect of the sugar liquid and the catalyst. Therefore, on the premise of guaranteeing transformation efficiency (generally over 98.5 percents), the ratio of the hydrogen to liquid is reduced from 10:1 to (3 to 5): 1 and the workload of a compressor is reduced greatly.
Description
The present invention relates to the method that a kind of carbohydrate hydrogenation prepares sugar alcohol.
Carbohydrate hydrogenation, promptly produce corresponding alcohol with corresponding sugared hydrogenation, as glucose system sorbyl alcohol, wood sugar making xylitol, maltose malt sugar alcohol, the oligomeric sugar alcohol of oligose system etc., all adopt the method for sugar soln hydrogenating reduction under the condition that has catalyzer to exist, its Technology has two lines, i.e. intermittently hydrogenation and continuous hydrogenation.
The continuous hydrogenation method is a kind of Technology that RECENT DEVELOPMENTS is got up, ready sugar soln is continuously squeezed into the column reactor that is filled with the solid block catalyzer with high-pressure pump, under certain temperature and pressure, make sugar soln and hydrogen enter reactor, discharge from reactor through certain hour, obtain sugar alcohol solution.There are the interrupter method of Denmark, gondola continuous processing and interrupter method in the nineties China from the sorbyl alcohol equipment of external introduction.Two placed in-line reaction columns of the general employing of external continuous hydrogenation.In order to make liquid glucose reduce resistance and pressure reduction, it generally is 10: 1 so reaction column adopts aspect ratio smoothly by having filled the reaction column of catalyzer.The concentration of sugar, the concentration of general glucose is about 50%.The continuous hydrogenation reaction column of the former Soviet Union is 6000mm * 550mm, and aspect ratio is 10.9: 1, and two aspect ratio that are together in series are 21.8: 1.Because hydrogenation is to operate under pressure, so the manufacturing reaction column often welds with cast steel or multilayer volume, the material of usefulness is many, and is with high costs, and the hydrogenation equipment of introducing 5000 tons of cover annual outputs needs 2,000,000 dollars approximately.
The objective of the invention is to overcome the deficiencies in the prior art part, the saccharide continuous hydrogenation process that a kind of device fabrication is simple, cost is low, the compressor operating amount is little is provided.
Technical solution of the present invention is to adopt stainless nothing to meet steel pipe to make reaction column, many series connection of reaction column, and aspect ratio is greater than 100: 1, granules of catalyst 11-25mm.
The invention has the advantages that apparatus processing is simple, select for use the stainless nothing of respective diameters to meet steel pipe or stainless steel plate welded tube to add that method indigo plant gets final product, and stopping property better solves; High aspect ratio makes liquid glucose, hydrogen and catalyzer three-phase increase touch opportunity, improved the catalytic effect of liquid glucose and catalyzer, thereby guaranteeing to make the hydrogen liquor ratio reduce to 3-5 from 10: 1 under the prerequisite of transformation efficiency (generally more than 98.5%): 1, thus significantly reduced the workload of compressor.
Fig. 1 is a schematic flow sheet of the present invention.
Fig. 2 is many series connection high-pressure reactor synoptic diagram.
Describe the present invention below in conjunction with accompanying drawing.With ready sugar soln, send into the PH setter of measuring apparatus, make solution PH transfer to 7.5-8, then quantitatively by the high pressure charging pump, the pressure of pump is 4-8MPa, gets to the hydrogen liquid mixer again, mixes mutually with hydrogen from the high-pressure buffer device, the hydrogen liquor ratio is 3-5: 1, pass through preheater then, the mixture heating up that makes the sugar soln of adjusted PH and hydrogen automatically is pressed into reactor then to 80-90 ℃, filled up activatory catalyzer in the reactor, the granularity of catalyzer is 11-25mm.The mixture of sugar soln and hydrogen from bottom to top flows, and linear velocity is 20-40L/M/H.Be subjected to the resistance of catalyst reactor, constantly solution is contacting catalyzer with the hydrogen alternate repetition.At this moment the pressure in the reactor is at 4-8MPa, and temperature is at 135-150 ℃, and sugar soln is hydrogenation successfully in reactor, changes into sugar alcohol solution, all discharges from reactor top, by high voltage bearing water cooler, enters high-pressure separator.The excessive remaining hydrogen of reaction is discharged at the top of high-pressure separator, all discharges sugar alcohol solution the end of at.Because just the sugar alcohol solution of discharging down from high pressure also is dissolved with some hydrogen, so must pass through the normal pressure separator, micro-hydrogen is emitted, and could collect reacting the sugar alcohol solution that finishes.The concentration of sugar, glucose with 20-30% (all being weight percentage) for well, wood sugar with 10-15% for well.If with the wood sugar is raw material, the pressure of pump and the pressure of high-pressure reactor with 6-8MPa for well.
High-pressure reactor is composed in series by a plurality of reaction columns, and reaction column adopts stainless nothing to meet steel pipe or stainless steel plate welded tube to make, and total aspect ratio was greater than 100: 1.Sugar soln 1 and hydrogen 2 mixes the back and saves the lower end by the head of reaction column 3 and enter, and beaded catalyst 4 is housed in the reaction column 3, and reaction back sugar alcohol solution 5 and unnecessary hydrogen 2 are discharged by the minor details top of reaction column 3.
Embodiment 1:
With 1 ton of 20% glucose solution, send into the PH setter of measuring apparatus, make solution PH transfer to 7.5, then by the high pressure charging pump, the pressure of pump is 5MPa, get to the hydrogen liquid mixer again, mix mutually with hydrogen from the high-pressure buffer device, the hydrogen liquor ratio is 3.5: 1, pass through preheater then, make the mixture heating up to 83 ℃ of the sugar soln of adjusted PH and hydrogen, automatically be pressed into reactor then, it is that 18: 1 reaction column is composed in series that reactor props up aspect ratio by six lists, total aspect ratio is 108: 1, has filled up activatory catalyzer in the reactor, and the granularity of catalyzer is about 15mm, the mixture of sugar soln and hydrogen from bottom to top flows, and linear velocity is 25L/M/H.Be subjected to the resistance of catalyst reactor, constantly solution is contacting catalyzer with the hydrogen alternate repetition.At this moment the pressure in the reactor is at 5MPa, and temperature is at 140 ℃, and sugar soln is hydrogenation successfully in reactor, changes into Sorbitol Solution USP, discharges from reactor head, by high voltage bearing water cooler, enters high-pressure separator.The excessive remaining hydrogen of reaction is discharged at the top of high-pressure separator, discharges Sorbitol Solution USP in the bottom.Sorbitol Solution USP by the normal pressure separator, further makes micro-hydrogen emit again, gets about 1 ton of sorbitol solution, and concentration is 20%.Example material name PH hydrogen liquid preheating temperature of reactor sugar alcohol solution transformation efficiency % weight T, concentration % value is than temperature ℃ pressure MPa ℃ weight T, concentration %1 glucose
1 20 7.5 3.5: 1 83 5 140 1 20 98.52 glucose
1 25 8 3.9: 1 90 8 145 1 25 993 wood sugars, 1 10 7.5 3.5: 1 80 6 125 1 10 994 wood sugars 118 4.5: 1 85 5 130 1 15 99.5
Claims (3)
1, a kind of glucose continuous hydrogenation prepares the method for sorbyl alcohol, the concentration that it is characterized in that glucose is 20-30%, the granularity of catalyzer is 11-25mm, the mixture of glucose solution and hydrogen is continuously by special-purpose reaction under high pressure post, this reaction under high pressure post is composed in series by a plurality of reaction columns, reaction column adopts seamless stainless steel pipe or stainless steel plate welded tube to make, and total aspect ratio was greater than 100: 1, and the mixture of glucose solution and hydrogen is 20-40L/M/H by the linear velocity of reaction column.
2, a kind of wood sugar continuous hydrogenation prepares the method for Xylitol, the concentration that it is characterized in that wood sugar is 10-15%, the granularity of catalyzer is 11-25mm, the mixture of xylose solution and hydrogen is continuously by special-purpose reaction under high pressure post, this reaction under high pressure post is composed in series by a plurality of reaction columns, reaction column adopts seamless stainless steel pipe or stainless steel plate welded tube to make, and total aspect ratio was greater than 100: 1, and the mixture of xylose solution and hydrogen is 20-40L/M/H by the linear velocity of reaction column.
3, a kind of glucose continuous hydrogenation prepares the special high-pressure reaction column that sorbyl alcohol or wood sugar continuous hydrogenation prepare Xylitol, it is characterized in that this reaction under high pressure post is composed in series by a plurality of reaction columns, reaction column adopts seamless stainless steel pipe or stainless steel plate welded tube to make, total aspect ratio was greater than 100: 1, and the mixture of sugar soln and hydrogen is 20-40L/M/H by the linear velocity of reaction column.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97103695A CN1067970C (en) | 1997-03-28 | 1997-03-28 | High aspect ratio saccharide continuous hydrogenation process and its equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97103695A CN1067970C (en) | 1997-03-28 | 1997-03-28 | High aspect ratio saccharide continuous hydrogenation process and its equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1194965A CN1194965A (en) | 1998-10-07 |
| CN1067970C true CN1067970C (en) | 2001-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN97103695A Expired - Fee Related CN1067970C (en) | 1997-03-28 | 1997-03-28 | High aspect ratio saccharide continuous hydrogenation process and its equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10759727B2 (en) | 2016-02-19 | 2020-09-01 | Intercontinental Great Brands Llc | Processes to create multiple value streams from biomass sources |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110862298B (en) * | 2019-11-08 | 2023-04-11 | 黑龙江新和成生物科技有限公司 | Preparation method of sorbitol |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157189A (en) * | 1995-11-08 | 1997-08-20 | 东和化成工业株式会社 | Raney catalyst, process for producing it and process for producing sugar-alcohol using the same |
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1997
- 1997-03-28 CN CN97103695A patent/CN1067970C/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1157189A (en) * | 1995-11-08 | 1997-08-20 | 东和化成工业株式会社 | Raney catalyst, process for producing it and process for producing sugar-alcohol using the same |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10759727B2 (en) | 2016-02-19 | 2020-09-01 | Intercontinental Great Brands Llc | Processes to create multiple value streams from biomass sources |
| US11840500B2 (en) | 2016-02-19 | 2023-12-12 | Intercontinental Great Brands Llc | Processes to create multiple value streams from biomass sources |
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| Publication number | Publication date |
|---|---|
| CN1194965A (en) | 1998-10-07 |
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Inventor after: You Xin Inventor after: Fang Xiping Inventor before: You Xin |
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