CN102276448A - Hydrogen recovery method in PTA production apparatus - Google Patents
Hydrogen recovery method in PTA production apparatus Download PDFInfo
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- CN102276448A CN102276448A CN201110159006XA CN201110159006A CN102276448A CN 102276448 A CN102276448 A CN 102276448A CN 201110159006X A CN201110159006X A CN 201110159006XA CN 201110159006 A CN201110159006 A CN 201110159006A CN 102276448 A CN102276448 A CN 102276448A
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- China
- Prior art keywords
- hydrogen
- reduced
- hydrogenator
- pta production
- crude terephthalic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The invention relates to a hydrogen recovery method in a PTA production apparatus. With the method, defects in prior arts can be overcome. According to the invention, crude terephthalic acid is reduced into benzoic acid in a hydrogenation reactor by using hydrogen; a hydrogen recovering method is adopted, such that residual hydrogen is repeatedly utilized. Therefore, prior arts are improved, a large amount of hydrogen is saved, and cost of enterprises is reduced.
Description
Technical fieldThe present invention relates to a kind of hydrogen recycling method, specifically relate to hydrogen recycling method in a kind of PTA production equipment.
Background technologyThe PTA production equipment of using is that crude terephthalic acid is reduced with hydrogen to phenylformic acid in hydrogenator now, after hydrogen carried out off gas treatment, directly discharging, need to consume a large amount of hydrogen like this, off gas treatment also consumes a large amount of costs, cause resource and cost waste, be unfavorable for environmental protection.
Summary of the inventionIn order to solve the problem that above-mentioned prior art exists, the present invention adopts hydrogen recycling method in a kind of PTA production equipment, overcome deficiency of the prior art, crude terephthalic acid is reduced with hydrogen to phenylformic acid in hydrogenator, the method that employing utilizes hydrogen recovery is recycled remaining hydrogen, has improved existing processes, save a large amount of hydrogen, reduced the cost of enterprise.
In order to solve the problems of the technologies described above, crude terephthalic acid to be reduced with hydrogen to phenylformic acid to be achieved through the following technical solutions:
1. crude terephthalic acid is reduced through hydrogenator, obtain the product phenylformic acid; The hydrogen of residue 55% does not participate in reaction;
2. remaining hydrogen is lowered the temperature through crystallizer, step-down absorbs moisture and handles;
3. remaining hydrogen is carried out purification processes;
4. the hydrogen after will purifying compresses through hydrogen gas compressor;
5. adding hydrogenator after the hydrogen recovery after will compressing participates in the reaction;
Circulation has and so forth avoided hydrogen directly to discharge the loss that brings, and a large amount of hydrogen have been saved in the utilization again of hydrogen resource, have reduced the cost of enterprise.The environmental protection of this energy saving technology, cost is reasonable.
Description of drawings
Fig. 1 is former process flow diagram.
Fig. 2 is for improving back process flow diagram of the present invention.
Embodiment
Crude terephthalic acid is reduced with hydrogen to phenylformic acid to be achieved through the following technical solutions:
1. crude terephthalic acid is reduced through hydrogenator, obtain the product phenylformic acid; The hydrogen of residue 55% does not participate in reaction;
2. remaining hydrogen is lowered the temperature through crystallizer, step-down absorbs moisture and handles;
3. remaining hydrogen is carried out purification processes;
4. the hydrogen after will purifying compresses through hydrogen gas compressor;
5. adding hydrogenator after the hydrogen recovery after will compressing participates in the reaction;
Circulation and so forth utilizes hydrogen repeatedly again.
Claims (1)
1. hydrogen recycling method in the PTA production equipment is reduced with hydrogen to phenylformic acid with crude terephthalic acid in hydrogenator, it is characterized in that:
1. crude terephthalic acid is reduced through hydrogenator, obtain the product phenylformic acid; The hydrogen of residue 55% does not participate in reaction;
2. remaining hydrogen is lowered the temperature through crystallizer, step-down absorbs moisture and handles;
3. remaining hydrogen is carried out purification processes;
4. the hydrogen after will purifying compresses through hydrogen gas compressor;
5. adding hydrogenator after the hydrogen recovery after will compressing participates in the reaction;
Circulation and so forth utilizes hydrogen repeatedly again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110159006XA CN102276448A (en) | 2011-06-14 | 2011-06-14 | Hydrogen recovery method in PTA production apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110159006XA CN102276448A (en) | 2011-06-14 | 2011-06-14 | Hydrogen recovery method in PTA production apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102276448A true CN102276448A (en) | 2011-12-14 |
Family
ID=45102240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110159006XA Pending CN102276448A (en) | 2011-06-14 | 2011-06-14 | Hydrogen recovery method in PTA production apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102276448A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106190271A (en) * | 2016-08-30 | 2016-12-07 | 河南利源化工科技有限公司 | A kind of recovery method that coal tar hydrogenating unit is diffused hydrogen |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093114C (en) * | 1997-07-16 | 2002-10-23 | 纳幕尔杜邦公司 | Improved process for recovering hydrogen in producing pure terephthalic acid |
-
2011
- 2011-06-14 CN CN201110159006XA patent/CN102276448A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1093114C (en) * | 1997-07-16 | 2002-10-23 | 纳幕尔杜邦公司 | Improved process for recovering hydrogen in producing pure terephthalic acid |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106190271A (en) * | 2016-08-30 | 2016-12-07 | 河南利源化工科技有限公司 | A kind of recovery method that coal tar hydrogenating unit is diffused hydrogen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111214 |