Process for producing pellets of copolymers of propylene
US-2017341267-A1 · Nov 30, 2017 · US
Method of cleaning a heat exchanger
US2016146557A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016146557-A1 |
| Application number | US-201414903332-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 15, 2014 |
| Priority date | Jul 22, 2013 |
| Publication date | May 26, 2016 |
| Grant date | — |
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- Title
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Abstract
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The present invention relates to heat exchangers, and in particular to a method for treatment of a heat exchanger which in operation is used to cool process water which has been in contact with polymer particles, which method comprises passing to the process side of the heat exchanger a treatment stream whilst the heat exchanger is at an elevated temperature compared to the temperature when the heat exchanger is in operation.
First claim
Opening claim text (preview).
1 - 12 . (canceled) 13 . A method for treatment of a heat exchanger which in operation is used to cool process water which has been in contact with polymer particles, which method comprises passing to the process side of the heat exchanger a treatment stream whilst the heat exchanger is at an elevated temperature compared to the temperature when the heat exchanger is in operation. 14 . A method according to claim 13 wherein the process water is used to convey polymer particles from one location to another and is then separated from the polymer particles and passed to the heat exchanger to be cooled prior to being used again. 15 . A method according to claim 13 wherein the process water is process water for underwater pelletising operations. 16 . A method according to claim 15 wherein the polymer particles with which the process water has been in contact comprise additives which have been added prior to or during pelletising. 17 . A method according to claim 16 wherein the polymer particles with which the process water has been in contact comprise additives which are insoluble in the process water and have a melting point of 45° C. to 110° C. 18 . A method according to claim 13 wherein the polymer particles with which the process water has been in contact comprise erucamide and silica. 19 . A method according to claim 13 wherein during the treatment the heat exchanger is at a temperature at least 5° C. higher than the temperature when the heat exchanger is in operation. 20 . A method according to claim 13 wherein cooling medium is not passed through the heat exchanger during the treatment. 21 . A method according to claim 13 wherein the treatment stream is also an aqueous stream. 22 . A method according to claim 21 wherein the aqueous stream comprises fresh water. 23 . A method according to claim 22 wherein the fresh water is water which is added as “make-up water” to the process water. 24 . A method according to claim 13 wherein the treatment stream comprises a portion of the process water which is used in operation. 25 . A method according to claim 18 wherein during the treatment the heat exchanger is at a temperature at least 5° C. higher than the temperature when the heat exchanger is in operation. 26 . A method according to claim 18 wherein cooling medium is not passed through the heat exchanger during the treatment. 27 . A method according to claim 18 wherein the treatment stream is also an aqueous stream. 28 . A method according to claim 27 wherein the aqueous stream comprises fresh water. 29 . A method according to claim 28 wherein the fresh water is water which is added as “make-up water” to the process water. 30 . A method according to claim 18 wherein the treatment stream comprises a portion of the process water which is used in operation.
Assignees
Inventors
Classifications
with additional treatment of the liquid or of the object being cleaned, e.g. by heat, by electricity or by vibration · CPC title
cleaning by increasing the temperature of heat exchange surfaces (F28G7/005, F28G11/00 take precedence) · CPC title
under-water, e.g. underwater pelletizers · CPC title
- F28G9/00Primary
Cleaning by flushing or washing, e.g. with chemical solvents (appliances using jets of fluid for removing debris F28G1/16, F28G3/16) · CPC title
Auxiliary treatment of granules · CPC title
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- What does patent US2016146557A1 cover?
- The present invention relates to heat exchangers, and in particular to a method for treatment of a heat exchanger which in operation is used to cool process water which has been in contact with polymer particles, which method comprises passing to the process side of the heat exchanger a treatment stream whilst the heat exchanger is at an elevated temperature compared to the temperature when the…
- Who is the assignee on this patent?
- Ineos Europe Ag
- What technology area does this patent fall under?
- Primary CPC classification F28G9/00. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Thu May 26 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).