CN1258635A - Concentrated hydrochloric acid preparing method and equipment by using hydrogen chloride as by product of chlorinated paraffin production - Google Patents
Concentrated hydrochloric acid preparing method and equipment by using hydrogen chloride as by product of chlorinated paraffin production Download PDFInfo
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- CN1258635A CN1258635A CN 98126123 CN98126123A CN1258635A CN 1258635 A CN1258635 A CN 1258635A CN 98126123 CN98126123 CN 98126123 CN 98126123 A CN98126123 A CN 98126123A CN 1258635 A CN1258635 A CN 1258635A
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- hydrogen chloride
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Abstract
The preparation includes the technological setps of showering concentrated hydrochloric acid to eliminate organic matter, circular two stage absorption, bubble elimination of chlorine in concentrated hydrochloric acid, etc. By means of the method and equipment of the present invention, concentrated hydrochloric acid with 31-33% concentration and high quality may be prepared. The present invention is especially suitable for use in chlorinated paraffin producer.
Description
The present invention relates to a kind of method and device for preparing hydrochloric acid, particularly utilize hydrogen chloride as by product of chlorinated paraffin production to prepare the method and the device of concentrated hydrochloric acid.
At present, the by-product hydrogen chloride that produces in the domestic production clorafin, all be to adopt water to absorb the preparation by-product hydrochloric acid, but because of relieving haperacidity backward in technique, the concentration of hydrochloric acid of preparation can only reach 20-25%, and contain many organism and dissolved chlorine in the by-product hydrochloric acid, therefore, limited the use value of by-product hydrochloric acid.There is report to utilize many ceramic ware mouth cylinder series connection in early days, the water absorbing hydrogen chloride, but assimilation effect is poor.The packing tower of employing water spray absorption process is also arranged or use the falling liquid film graphitic absorber, still can't reach the concentration of hydrochloric acid more than 31%.
The purpose of this invention is to provide a kind of method and device that utilizes hydrogen chloride as by product of chlorinated paraffin production to prepare concentrated hydrochloric acid, be used for preparing the above concentrated hydrochloric acid of 31-33%, to solve the deficiencies in the prior art part.
The said method of utilizing hydrogen chloride as by product of chlorinated paraffin production to prepare concentrated hydrochloric acid of the present invention comprises the following steps:
(1), by-product hydrogen chloride gas is introduced a circulation washing device that is made of organism washing tower, concentrated acid circulation groove, primary acids pump, adopt concentrated hydrochloric acid to carry out spray washing, with the organism in the flush away by-product hydrogen chloride;
(2), the hydrogen chloride gas after will washing is introduced the circulation absorption unit that a graphite falling film absorber by two-stage series connection, sour medial launder, secondary acid pump constitute from the top of organism washing tower, absorption circulates, wherein graphite falling film absorber adopts water cooling, makes the temperature that absorbs the concentrated hydrochloric acid that forms be lower than 50 ℃;
(3), bottom water that unabsorbed a small amount of tail gas is introduced tail gas tower sprays absorbing hydrogen chloride, unabsorbed chlorine is entered the clorox of preparation 10-13% by the top of tail gas tower;
(4), the concentrated hydrochloric acid that is stored in the concentrated acid vat introduces the concentrated acid elevated dosing vessels with three grades of sour pumps, employing air bubbling method is driven dissolved chlorine in the clean concentrated hydrochloric acid.
Be used to realize that the device of method of the present invention comprises:
A circulation washing device that constitutes by organism washing tower, concentrated acid circulation groove, primary acids pump, wherein concentrated acid circulation groove, primary acids pump are by conduit, be connected the top and the bottom of organism washing tower, the by-product hydrogen chloride ingress pipe is connected in the bottom of organism washing tower, and the top of by-product hydrogen chloride delivery line and organism washing tower connects;
The absorption unit that graphite falling film absorber by two-stage series connection, sour medial launder, secondary acid pump constitute, the top of wherein said by-product hydrogen chloride delivery line and first step graphite falling film absorber connects, the bottom of first step graphite falling film absorber is connected with described sour medial launder and concentrated acid vat respectively by conduit, described sour medial launder is connected with the top of secondary graphite falling film absorber by diacid pump, conduit, and the bottom of concentrated acid delivery line and secondary graphite falling film absorber connects;
The tail gas tower that the bottom is connected with sour medial launder and described concentrated acid delivery line, wherein water inlet pipe, chlorine tube are connected with the top of tail gas tower;
A concentrated acid vat;
A concentrated acid elevated dosing vessel that is connected by three grades of sour pumps, conduits, wherein the concentrated acid elevated dosing vessel is connected with airway.
The present invention has following advantage:
1, uses the organism of the overwhelming majority of concentrated acid flush away by-product hydrogen chloride, improved the purity of hydrochloric acid;
2, adopt the graphite falling film absorber circulation of two-stage tandem to absorb, the specific absorption of hydrogenchloride is reached about 98%, preparation concentrated hydrochloric acid concentration reaches 31-33%;
3, adopt the air bubbling method fall effectively most preparation concentrated hydrochloric acid in chlorine, improve the quality of concentrated hydrochloric acid;
4, processing method simple possible, equipment constitutes simple, less investment, instant effect.
Fig. 1 is the structural representation of the said device of the present invention.
Further narrate the present invention again below in conjunction with accompanying drawing.
As shown in Figure 1, hydrogen chloride as by product of chlorinated paraffin production is by the bottom of ingress pipe (1) introducing by organism washing tower (2), concentrated hydrochloric acid in the concentrated acid circulation groove (3) carries out spray washing by the top that primary acids pump (4), conduit (5) are pumped into organism washing tower (2), removing the organism in the by-product hydrogen chloride, the concentrated hydrochloric acid behind the spray from the bottom of organism washing tower (2) in conduit (6) flow back into concentrated acid circulation groove (3) so that recycle;
Carry out first step falling film absorption in the top of by-product hydrogen chloride after the concentrated hydrochloric acid washing by by-product hydrogen chloride delivery line (7) introducing one-level graphite falling film absorber (8), liquid phase after one-level absorbs is entered from the bottom of one-level graphite falling film absorber (8) in the sour medial launder (10) for recycling by conduit (9), or directly enters in the concentrated acid vat (12) by conduit (11) after metering; Gas phase after one-level absorbs is incorporated into by conduit (13) in the top of secondary graphite falling film absorber (14) carries out second stage falling film absorption, gas phase after secondary absorbs is incorporated into tail gas tower (16) by concentrated acid delivery line (15) from the bottom of secondary graphite falling film absorber (14) bottom is carried out the water spray and is absorbed, liquid phase after secondary absorbs is incorporated into one-level graphite falling film absorber (8) by conduit (17) and carries out falling film absorption once more, the liquid phase chlorination hydrogen of wherein sour medial launder (10) is by secondary acid pump (18), conduit (19) is pumped into the top of secondary graphite falling film absorber (14) and carries out secondary falling liquid film circulation absorption once more, wherein one, secondary graphite falling film absorber (8), (14) adopt water cooling, make the temperature that absorbs the concentrated hydrochloric acid that forms be lower than 50 ℃;
Introduce the gas phase after the interior secondary of tail gas tower (16) absorbs, just tail gas sprays by the deionized water of being introduced from tail gas tower (16) top by water inlet pipe (20), liquid phase behind the spray flows into by conduit (21) and supplies in the sour medial launder (10) to recycle, and the chlorine behind the spray is sent into the clorox of preparation 10-13% by the chlorine tube (21) that is connected with tail gas tower (16) top;
The concentrated hydrochloric acid that is stored in the concentrated acid vat (12) is introduced in the concentrated acid elevated dosing vessel (23) by three grades of sour pumps (22), conduit (25), imports air by airway (24) and carries out bubbling and drive that dissolved chlorine gets final product tinning in the clean concentrated hydrochloric acid.
Claims (2)
1, utilizes hydrogen chloride as by product of chlorinated paraffin production to prepare the method for concentrated hydrochloric acid, it is characterized in that this method comprises the following steps:
(1), adopt concentrated hydrochloric acid to carry out spray washing circulation washing device that constitutes by organism washing tower (2), concentrated acid circulation groove (3), primary acids pump (4) of by-product hydrogen chloride gas introducing, with the organism in the flush away by-product hydrogen chloride;
(2), the hydrogen chloride gas after will washing is introduced the absorption that circulates of circulation absorption unit that a graphite falling film absorber by two-stage series connection (8), (14), sour medial launder (10), secondary acid pump (8) constitute from the top of organism washing tower (2);
(3), bottom water that unabsorbed a small amount of tail gas is introduced tail gas tower (16) sprays absorbing hydrogen chloride, unabsorbed chlorine is entered the clorox of preparation 10-13% by the top of tail gas tower (16);
(4), the concentrated hydrochloric acid that is stored in the concentrated acid vat (12) introduces concentrated acid elevated dosing vessel (23) with three grades of sour pumps (22), employing air bubbling method is driven dissolved chlorine in the clean concentrated hydrochloric acid.
2, a kind of device that is used to realize the method for claim 1, it is characterized in that this device comprises: a circulation washing device that constitutes by organism washing tower (2), concentrated acid circulation groove (3), primary acids pump (4), wherein concentrated acid circulation groove (3), primary acids pump (4) are connected the top and the bottom of organism washing tower (2) by conduit (5), (6), by-product hydrogen chloride ingress pipe (1) is connected in the bottom of organism washing tower (2), and by-product hydrogen chloride delivery line (7) connects with the top of organism washing tower (2);
Graphite falling film absorber (8) by two-stage series connection, (14), acid medial launder (10), the absorption unit that secondary acid pump (18) constitutes, wherein said by-product hydrogen chloride delivery line (7) connects with the top of first step graphite falling film absorber (8), the bottom of first step graphite falling film absorber (8) is by conduit (9), (11) be connected with described sour medial launder (10) and concentrated acid vat (12) respectively, described sour medial launder (10) is by three grades of sour pumps (18), conduit (19) is connected with the top of secondary graphite falling film absorber (14), and concentrated acid delivery line (15) connects with the bottom of secondary graphite falling film absorber (14);
The tail gas tower (16) that the bottom is connected with sour medial launder (10) and described concentrated acid delivery line (15), wherein water inlet pipe (20), chlorine tube (21) are connected with the top of tail gas tower (16);
A concentrated acid vat (12);
A concentrated acid elevated dosing vessel (23) that is connected by three grades of sour pumps (22), conduit (25), wherein concentrated acid elevated dosing vessel (23) is connected with airway (24).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98126123 CN1258635A (en) | 1998-12-31 | 1998-12-31 | Concentrated hydrochloric acid preparing method and equipment by using hydrogen chloride as by product of chlorinated paraffin production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98126123 CN1258635A (en) | 1998-12-31 | 1998-12-31 | Concentrated hydrochloric acid preparing method and equipment by using hydrogen chloride as by product of chlorinated paraffin production |
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| Publication Number | Publication Date |
|---|---|
| CN1258635A true CN1258635A (en) | 2000-07-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98126123 Pending CN1258635A (en) | 1998-12-31 | 1998-12-31 | Concentrated hydrochloric acid preparing method and equipment by using hydrogen chloride as by product of chlorinated paraffin production |
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| CN (1) | CN1258635A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460312C (en) * | 2006-09-20 | 2009-02-11 | 河北沧州大化集团有限责任公司 | Method of preparing hydrochloric acid using TDI byproduct hydrogen chloride gas and its device |
| CN104973572A (en) * | 2015-07-17 | 2015-10-14 | 河北冀衡集团有限公司威武分公司 | Purification plant and purification technique of chlorinated paraffin coproduct hydrogen chloride |
| CN108017039A (en) * | 2017-12-24 | 2018-05-11 | 江苏梅兰化工有限公司 | Monochlorodifluoromethane by-product HCL produces the preparation method and device of high purity hydrochloric acid |
| CN111068465A (en) * | 2019-12-30 | 2020-04-28 | 山东旭锐新材有限公司 | Continuous absorption method for byproduct hydrogen chloride gas in chlorination reaction |
| CN114768478A (en) * | 2022-04-25 | 2022-07-22 | 南通星球石墨股份有限公司 | High-purity hydrochloric acid preparation system |
| CN115006975A (en) * | 2022-05-07 | 2022-09-06 | 南通星球石墨股份有限公司 | Method for recycling hydrogen chloride in dichlorobenzene byproducts |
| CN115368205A (en) * | 2022-09-01 | 2022-11-22 | 山东沾化阳光化学有限公司 | Process for producing methane chloride by using hydrogen chloride gas as byproduct of chlorinated paraffin |
-
1998
- 1998-12-31 CN CN 98126123 patent/CN1258635A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100460312C (en) * | 2006-09-20 | 2009-02-11 | 河北沧州大化集团有限责任公司 | Method of preparing hydrochloric acid using TDI byproduct hydrogen chloride gas and its device |
| CN104973572A (en) * | 2015-07-17 | 2015-10-14 | 河北冀衡集团有限公司威武分公司 | Purification plant and purification technique of chlorinated paraffin coproduct hydrogen chloride |
| CN108017039A (en) * | 2017-12-24 | 2018-05-11 | 江苏梅兰化工有限公司 | Monochlorodifluoromethane by-product HCL produces the preparation method and device of high purity hydrochloric acid |
| CN111068465A (en) * | 2019-12-30 | 2020-04-28 | 山东旭锐新材有限公司 | Continuous absorption method for byproduct hydrogen chloride gas in chlorination reaction |
| CN114768478A (en) * | 2022-04-25 | 2022-07-22 | 南通星球石墨股份有限公司 | High-purity hydrochloric acid preparation system |
| CN115006975A (en) * | 2022-05-07 | 2022-09-06 | 南通星球石墨股份有限公司 | Method for recycling hydrogen chloride in dichlorobenzene byproducts |
| CN115368205A (en) * | 2022-09-01 | 2022-11-22 | 山东沾化阳光化学有限公司 | Process for producing methane chloride by using hydrogen chloride gas as byproduct of chlorinated paraffin |
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