CN1686983A - Method fo rproducing high pure methane chloride - Google Patents
Method fo rproducing high pure methane chloride Download PDFInfo
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- CN1686983A CN1686983A CN 200510038993 CN200510038993A CN1686983A CN 1686983 A CN1686983 A CN 1686983A CN 200510038993 CN200510038993 CN 200510038993 CN 200510038993 A CN200510038993 A CN 200510038993A CN 1686983 A CN1686983 A CN 1686983A
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- hydrochloric acid
- methane chloride
- methane
- monochloro methane
- quench
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Abstract
The present invention discloses a method for producing high-purity methane chloride. It uses methyl alcohol and hydrogen chloride as raw material, in the pressure of active catalyst, under the conditiojn of 280-320 deg.C and 0.2-0.6 MPa it utilizes gas-phase reaction to obtain methane chloride and water, after the high-temperature reaction gas discharged from reactor is chilled by dilute hydrochloric acid, the separated humid gas is condensed by condenser, then dried by sulfuric acid, compressed and condeased to obtain methane chloride crude product, then said method makes said crude product pass through first rectification tower to remove light component from said methane chloride crude material, then makes it pass through secondary rectification tower to remove heavy component so as to raise methane chloride content, its purity can be greater than 99.96%.
Description
Technical field
The present invention relates to a kind of method fo rproducing high pure methane chloride.
Background technology
At present synthetic monochloro methane generally adopts liquid catalytic or gas and solid phase catalytic, and these two kinds of methods have all adopted washing, alkali cleaning, sulfuric acid drying to make the technology of monochloro methane.There is following shortcoming in this technology:
(1) the monochloro methane content of Sheng Chaning is low, generally at 98-99%.
(2) pollute greatly, the cost height can not satisfy the high-end market demand.
Summary of the invention
For solving quality and environmental issue in the synthetic monochloro methane technological process of tradition, the invention provides a kind of method fo rproducing high pure methane chloride.
Technical solution of the present invention is: methyl alcohol and hydrogenchloride are in the presence of the proprietary catalyzer of activity, at 260-320 ℃, 0.2-0.6MpaG under the condition, gas-phase reaction generates monochloro methane and water, going out the reactor high temperature reaction gas is reduced to about 80-150 ℃ through temperature after the dilute hydrochloric acid Quench, Quench liquid after separating is 20% hydrochloric acid, this acid is used for manufacture hydrochloric acid, separate the back moisture through condenser condenses (phlegma is that dilute hydrochloric acid is used for the reaction gas Quench), sulfuric acid drying, compression condensation make the thick product of monochloro methane.The thick product of monochloro methane removes light component in the monochloro methane coarse fodder by first rectifying tower, removes heavy component by rectifying by second rectifying tower again, obtains monochloro methane content greater than high-purity commodity monochloro methane of 99.96%.
The present invention adopts the method for two-tower rectification, can improve monochloro methane content height, makes it greater than 99.96%.The present invention has reduced washing, caustic wash process, and technology is simple, reduces investment outlay environmentally safe.。
Description of drawings
Below in conjunction with the drawings and specific embodiments the present invention is further specified.
Fig. 1 is the high-purity monochloro methane schematic flow sheet of a kind of production of the present invention
Fig. 2 is a conventional gas-phase catalysis method methane chloride production engineering synoptic diagram
Embodiment
According to shown in Figure 1, to be superheated to 180-220 ℃ methyl alcohol and hydrogenchloride by 1: 1.1～1.3 (mol ratios), in the presence of catalyzer, at 280-320 ℃, 0.2-0.4MpaG under the condition, gas-phase reaction generates monochloro methane and water, going out the reactor high temperature reaction gas is reduced to about 120 ℃ through temperature after the dilute hydrochloric acid Quench, Quench liquid after separating is 20% hydrochloric acid, this acid is used to produce 31% technical hydrochloric acid, separate the back moisture through condenser condenses (phlegma is that dilute hydrochloric acid is used for the reaction gas Quench), the sulfuric acid drying, compression condensation makes the thick product of monochloro methane.The thick product of monochloro methane removes light component in the monochloro methane coarse fodder by first rectifying tower, removes heavy component by rectifying by second rectifying tower again, obtains monochloro methane content greater than high-purity monochloro methane of 99.96%.
Claims (2)
1, a kind of method fo rproducing high pure methane chloride, with methyl alcohol and hydrogenchloride is raw material, active catalyst exists down, at 260-320 ℃, 0.2-0.6MpaG under the condition, gas-phase reaction generates monochloro methane and water, goes out the reactor high temperature reaction gas after the dilute hydrochloric acid Quench, separate the back moisture through condenser condenses (phlegma is that dilute hydrochloric acid is used for the reaction gas Quench), sulfuric acid drying, compression condensation make the thick product of monochloro methane; Remove light component in the monochloro methane coarse fodder by first rectifying tower, remove heavy component by second rectifying tower again.
2, production method according to claim 1 is characterized in that the Quench liquid after separating is 20% hydrochloric acid, and this acid is used for manufacture hydrochloric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038993 CN1686983A (en) | 2005-04-21 | 2005-04-21 | Method fo rproducing high pure methane chloride |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510038993 CN1686983A (en) | 2005-04-21 | 2005-04-21 | Method fo rproducing high pure methane chloride |
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| CN1686983A true CN1686983A (en) | 2005-10-26 |
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| CN 200510038993 Pending CN1686983A (en) | 2005-04-21 | 2005-04-21 | Method fo rproducing high pure methane chloride |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633598A (en) * | 2008-07-23 | 2010-01-27 | 汉能科技有限公司 | Method for preparing methane chloride by dimethyl sulfate |
| CN103044186A (en) * | 2013-01-17 | 2013-04-17 | 江苏银珠化工集团有限公司 | Method and system for rectifying and separating chloroethane |
| CN103044188A (en) * | 2013-01-17 | 2013-04-17 | 江苏银珠化工集团有限公司 | Halide alkylation technique and halide alkylation system for preparation of chloroethane |
| CN105859513A (en) * | 2016-05-23 | 2016-08-17 | 河南红东方化工股份有限公司 | Production method for chloromethane |
| CN106008151A (en) * | 2016-07-22 | 2016-10-12 | 合盛硅业股份有限公司 | Methyl chloride synthesis method |
| CN109081767A (en) * | 2018-09-30 | 2018-12-25 | 南京佳华工程技术有限公司 | A kind of the synthesis rectification technique and its equipment of monochloro methane |
-
2005
- 2005-04-21 CN CN 200510038993 patent/CN1686983A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101633598A (en) * | 2008-07-23 | 2010-01-27 | 汉能科技有限公司 | Method for preparing methane chloride by dimethyl sulfate |
| CN103044186A (en) * | 2013-01-17 | 2013-04-17 | 江苏银珠化工集团有限公司 | Method and system for rectifying and separating chloroethane |
| CN103044188A (en) * | 2013-01-17 | 2013-04-17 | 江苏银珠化工集团有限公司 | Halide alkylation technique and halide alkylation system for preparation of chloroethane |
| CN105859513A (en) * | 2016-05-23 | 2016-08-17 | 河南红东方化工股份有限公司 | Production method for chloromethane |
| CN106008151A (en) * | 2016-07-22 | 2016-10-12 | 合盛硅业股份有限公司 | Methyl chloride synthesis method |
| CN109081767A (en) * | 2018-09-30 | 2018-12-25 | 南京佳华工程技术有限公司 | A kind of the synthesis rectification technique and its equipment of monochloro methane |
| CN109081767B (en) * | 2018-09-30 | 2021-04-06 | 南京佳华工程技术有限公司 | Synthetic rectification process method and equipment for methane chloride |
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| C06 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Open date: 20051026 |