CN104707366A - Antifoaming agent for delaying coking - Google Patents
Antifoaming agent for delaying coking Download PDFInfo
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- CN104707366A CN104707366A CN201310676687.6A CN201310676687A CN104707366A CN 104707366 A CN104707366 A CN 104707366A CN 201310676687 A CN201310676687 A CN 201310676687A CN 104707366 A CN104707366 A CN 104707366A
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- defoamer
- antifoaming agent
- delayed coking
- coking
- foam
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Abstract
The invention relates to an antifoaming agent for delaying coking. The antifoaming agent comprises 10-35% of modified polysiloxane, 30-60% of long chain fatty alcohol and 20-50% of a solvent. The antifoaming agent is prepared through the following steps: mixing above components in proportion, stirring the above obtained system at 60-90DEG C for 1h, and cooling. The antifoaming agent has a low content of silicon of below 3%, is used for a coking delaying technology, can effectively inhibit and eliminate foams in a coke tower, and has the advantages of good antifoaming effect, small addition amount of 30-50ppm, wide sources of raw materials, and low cost.
Description
Technical field
The present invention relates to a kind of defoamer, particularly a kind of defoamer for delayed coking.
Background technology
Delay coking process is that residual oil is converted into gas through degree of depth thermal cracking, gasoline, diesel oil, the processing technology of wax oil and coke, it is refinery's Residual cracking and the important means improving yield of light oil, to different material strong adaptability, technology maturation, but containing natural surfactant in feed residue, this material makes the material in coke drum produce stable froth bed, the operation of this meeting STRENGTH ON COKE tower produces much bad impact, as: (1) foam can carry the pipeline before material enters fractionating column secretly, cause coking in pipeline, even block, need regular decoking, reduce the cycle of operation, (2) too high froth bed also occupies the useful space of coke drum, causes the utilization rate of coke drum to reduce, (3) yield of light oil is affected, (4) because the existence of bubble makes the indexs such as the mechanical strength of coke and electrical conductivity decline.
At present, Main Means industrial production solving foam adds defoamer at coke drum top, the defoamer majority of current use is silicone defoaming agent, as silicone oil, the structure of its uniqueness, character makes its extensive use, but feel in practice to bring harm containing the hydrofining technology of silicon defoaming agent to downstream, as silicon can be deposited on catalyst for refining, cause catalysqt deactivation, shorten catalyst life, and a large amount of sediment can be produced in hydrogenation process, cause the loss of plant running cycle short and catalyst, therefore, people replace having done a large amount of research work containing in silicon defoaming agent at the silicone content and searching that reduce defoamer, such as:
USP5,169,560 propose to use sulfonate and phosphate compounds to replace silicon-containing compound defoamer; USP5,472,637 propose to use polyisobutene compound to replace silicon-containing compound defoamer; USP5,389,299 propose to use animal oil to replace containing silicon defoaming agent; USP4,961,840 proposition polysilazanes mix direct injection mode to reduce the foam of coke drum with inert gas, its injection mode injects from coke drum top, inert gas is as adjoint gas, its effect is the viscosity controlling polysilazane, prevents inlet from blocking, but little to reduction silicone content effect.
Chinese patent CN1289819 reports a kind of delay coking process reducing foam layer in coke tower, the method can eliminate the foam in certain coke, partly can improve the utilization rate of coke drum, with inject containing compared with silicon defoaming agent in the whole operation cycle, silicone content in coking distillate significantly reduces, shortcoming is that efficiency is not high, and utilization rate of equipment and installations is low; Patent CN101045880 proposes a kind of containing 30-50% HMW block polyether, the additive that 20-40% fatty alcohol and 20-40% solvent are composited, for suppressing the generation of the foam of delayed coking coke drum, but shortcoming to be required addition large.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of delayed coking low silicon defoaming agent and its preparation method and application, component of antifoam agent wide material sources, preparation technology is simple and addition is few, successful.
Defoamer for delayed coking provided by the invention, by the modified polyorganosiloxane of 10-35%, the long-chain fatty alcohol of 30-60% and 20-50% solvent composition.
Described long-chain fatty alcohol is 2-amylalcohol, 4-methyl-2-hexanol, 3,5-dimethyl-3-hexanols, 3-enanthol or isooctanol.Preferably, long-chain fatty alcohol is isooctanol.
Described solvent is one or more mixing of gasoline, diesel oil, kerosene or heavy aromatic solvent oil.Preferably, solvent is heavy aromatic solvent oil.
The preparation method of the above-mentioned defoamer for delayed coking is: by said components according to after the mixing of described ratio, system cools after stirring 1 hour at 60-90 DEG C again, obtains delayed coking antifoaming agent.
Delayed coking antifoaming agent provided by the invention suppresses the application of foam layer in coke tower height in delayed coker produces.Preferably, described defoamer injects from top of tower, and addition is 15-35ppm, and more preferably, described addition is 30ppm.
Beneficial effect of the present invention: defoamer silicon content provided by the invention is below 3%, for delay coking process, when additive capacity is 15-35ppm, effectively can reduce foam layer height, there is excellent pressing down to steep effect to foam simultaneously, and then decrease the addition of defoamer, extend the green coke cycle of coke drum.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described, but do not limit protection scope of the present invention.
embodiment 1 one kinds of defoamers for delayed coking
Join in stirred tank by 50g modified polyorganosiloxane, 150g isooctanol, 50g heavy aromatic solvent oil, system cools after stirring 1 hour at 60-90 DEG C again, obtains the defoamer for delayed coking.
embodiment 2 one kinds of defoamers for delayed coking
Join in stirred tank by 50g modified polyorganosiloxane, 100g isooctanol, 50g heavy aromatic solvent oil, system cools after stirring 1 hour at 60-90 DEG C again, obtains delayed coking antifoaming agent.
embodiment 3 one kinds of defoamers for delayed coking
Join in stirred tank by 50g modified polyorganosiloxane, 80g isooctanol, 70g heavy aromatic solvent oil, system cools after stirring 1 hour at 60-90 DEG C again, obtains delayed coking antifoaming agent.
embodiment 4 one kinds of defoamers for delayed coking
Join in stirred tank by 50g modified polyorganosiloxane, 50g isooctanol, 60g heavy aromatic solvent oil, system cools after stirring 1 hour at 60-90 DEG C again, obtains delayed coking antifoaming agent.
embodiment 5 one kinds of defoamers for delayed coking
Join in stirred tank by 50g modified polyorganosiloxane, 100g isooctanol, 70g heavy aromatic solvent oil, system cools after stirring 1 hour at 60-90 DEG C again, obtains delayed coking antifoaming agent.
embodiment 6 one kinds of defoamers for delayed coking
Modified polyorganosiloxane by 10%, 60% 2-amylalcohol and 30% gasoline form.
embodiment 7 one kinds of defoamers for delayed coking
Modified polyorganosiloxane by 35%, 30% 4-methyl-2-hexanol and 35% diesel oil form.
embodiment 8 one kinds of defoamers for delayed coking
Modified polyorganosiloxane by 15%, 35% 3,5-dimethyl-3-hexanols and 50% kerosene composition.
embodiment 9 one kinds of defoamers for delayed coking
Modified polyorganosiloxane by 20%, 50% 3-enanthol and 30% heavy aromatic solvent oil form.
test example defoamer use limits
(1) antifoam performance of defoamer of the present invention, represents the performance of defoamer with defoamed ratio (η).
Computing formula is: η=(H1-H2)/H1*100%
In formula:
H1: add foam layer height before defoamer, mm
H2: add foam layer height after defoamer, mm
η-defoamed ratio, %
Experimental procedure
By sample under the temperature conditions of 60 DEG C, with the nitrogen bubble of constant flow rate, foam layer height is recorded after foam stabilization, then the defoamer solution of preparation is dripped, the time of the height of formation and lather collapse that measure foam respectively evaluates the serviceability of defoamer, to produce that foam is minimum and the froth breaking dosage added is minimum for optimum condition, develop best defoamer, concrete steps are as follows:
1, the preparation of feedstock oil sample, in simulation coke drum, each material ratio is prepared:
Coker gasoline: coking light distillate: coking heavy distillate=1: 2.5: 1 (mass ratioes)
2, get in 250ml sample introduction cylinder, put into constant temperature solution, pass into the nitrogen of constant flow rate, after foam stabilization, record foam height, add defoamer (addition is 30ppm), the change of record foam height, foam height is accurate to 1mm.
3, repeat said process under the same conditions with defoamer prepared by embodiment 1-5, the results are shown in Table 1.
Table 1
| Sample | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 |
| Add foam floor height mm before agent | 200 | 195 | 198 | 195 | 197 |
| Add foam floor height mm after agent | 76 | 33 | 46 | 65 | 54 |
| Defoamed ratio, % | 62 | 85 | 78 | 70 | 73 |
As shown in Table 1, defoamer prepared by embodiment 2 shows good antifoam performance, and defoamed ratio can reach 85%.
(2) defoamed ratio of defoamer under Different adding amount
Method is with (one), and the defoamer adopting embodiment 2 to prepare, the results are shown in Table 2.
Table 2
| Sample | 15ppm | 20ppm | 25ppm | 30ppm | 35ppm |
| Add foam floor height mm before agent | 190 | 196 | 196 | 200 | 197 |
| Add foam floor height mm after agent | 88 | 65 | 51 | 34 | 35 |
| Defoamed ratio, % | 54 | 67 | 74 | 83 | 82 |
As shown in Table 2, along with the increase of the addition of defoamer, defoamed ratio increases thereupon, and after dosage is more than 30ppm, the increasing degree of defoamed ratio is not obvious, so defoamer is good addition with 30ppm.
Claims (5)
1. for a defoamer for delayed coking, it is characterized in that: by the modified polyorganosiloxane of 10-35%, the long-chain fatty alcohol of 30-60% and 20-50% solvent composition.
2. the defoamer for delayed coking according to claim 1, is characterized in that: described long-chain fatty alcohol is 2-amylalcohol, 4-methyl-2-hexanol, 3,5-dimethyl-3-hexanols, 3-enanthol or isooctanol.
3. the defoamer for delayed coking according to claim 2, is characterized in that: described long-chain fatty alcohol is isooctanol.
4. the defoamer for delayed coking according to claim 1, is characterized in that: described solvent is one or more mixing of gasoline, diesel oil, kerosene or heavy aromatic solvent oil.
5. the defoamer for delayed coking according to claim 4, is characterized in that: described solvent is heavy aromatic solvent oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310676687.6A CN104707366A (en) | 2013-12-13 | 2013-12-13 | Antifoaming agent for delaying coking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310676687.6A CN104707366A (en) | 2013-12-13 | 2013-12-13 | Antifoaming agent for delaying coking |
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| CN104707366A true CN104707366A (en) | 2015-06-17 |
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| CN201310676687.6A Pending CN104707366A (en) | 2013-12-13 | 2013-12-13 | Antifoaming agent for delaying coking |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106267910A (en) * | 2016-08-10 | 2017-01-04 | 中国海洋石油总公司 | A kind of defoamer and its production and use |
| CN107737467A (en) * | 2017-10-23 | 2018-02-27 | 付海明 | Delayed coking antifoaming agent and its production and use |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4612109A (en) * | 1980-10-28 | 1986-09-16 | Nl Industries, Inc. | Method for controlling foaming in delayed coking processes |
| US5667669A (en) * | 1996-03-22 | 1997-09-16 | Betzdearborn Inc. | Methods for inhibiting foam |
| CN101045880A (en) * | 2007-04-16 | 2007-10-03 | 沈阳工业大学 | Additive for suppressing and delaying foam generation in coking reaction tower and its prepn process |
| CN101444708A (en) * | 2008-12-15 | 2009-06-03 | 南京石油化工股份有限公司 | Delayed coking antifoaming agent |
| CN102500140A (en) * | 2011-10-25 | 2012-06-20 | 金浦新材料股份有限公司 | High temperature resistant defoamer for delaying coking reaction tower |
| CN102764521A (en) * | 2012-07-12 | 2012-11-07 | 天津市瑞德赛恩新材料开发有限公司 | Delayed coking defoaming agent and preparation method and application thereof |
| CN103100240A (en) * | 2011-11-10 | 2013-05-15 | 中国石油化工股份有限公司 | Defoaming agent composition and application of same in delayed coking |
-
2013
- 2013-12-13 CN CN201310676687.6A patent/CN104707366A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4612109A (en) * | 1980-10-28 | 1986-09-16 | Nl Industries, Inc. | Method for controlling foaming in delayed coking processes |
| US5667669A (en) * | 1996-03-22 | 1997-09-16 | Betzdearborn Inc. | Methods for inhibiting foam |
| CN101045880A (en) * | 2007-04-16 | 2007-10-03 | 沈阳工业大学 | Additive for suppressing and delaying foam generation in coking reaction tower and its prepn process |
| CN101444708A (en) * | 2008-12-15 | 2009-06-03 | 南京石油化工股份有限公司 | Delayed coking antifoaming agent |
| CN102500140A (en) * | 2011-10-25 | 2012-06-20 | 金浦新材料股份有限公司 | High temperature resistant defoamer for delaying coking reaction tower |
| CN103100240A (en) * | 2011-11-10 | 2013-05-15 | 中国石油化工股份有限公司 | Defoaming agent composition and application of same in delayed coking |
| CN102764521A (en) * | 2012-07-12 | 2012-11-07 | 天津市瑞德赛恩新材料开发有限公司 | Delayed coking defoaming agent and preparation method and application thereof |
Non-Patent Citations (1)
| Title |
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| 幸松民，王一璐: "《有机硅合成工艺及产品应用》", 30 September 2000, 化学工业出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106267910A (en) * | 2016-08-10 | 2017-01-04 | 中国海洋石油总公司 | A kind of defoamer and its production and use |
| CN107737467A (en) * | 2017-10-23 | 2018-02-27 | 付海明 | Delayed coking antifoaming agent and its production and use |
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