JP2939306B2 - Method for recovering hydrogen chloride from waste gas from bisphenol compound production - Google Patents
Method for recovering hydrogen chloride from waste gas from bisphenol compound productionInfo
- Publication number
- JP2939306B2 JP2939306B2 JP2158764A JP15876490A JP2939306B2 JP 2939306 B2 JP2939306 B2 JP 2939306B2 JP 2158764 A JP2158764 A JP 2158764A JP 15876490 A JP15876490 A JP 15876490A JP 2939306 B2 JP2939306 B2 JP 2939306B2
- Authority
- JP
- Japan
- Prior art keywords
- hydrogen chloride
- gas
- waste gas
- bisphenol compound
- reactor
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、塩化水素を触媒としてフェノール類及びカ
ルボニル化合物からビスフェノール化合物を製造する際
に反応装置より排出される廃ガス中の塩化水素の回収方
法に関する。The present invention relates to the recovery of hydrogen chloride in waste gas discharged from a reactor when a bisphenol compound is produced from phenols and carbonyl compounds using hydrogen chloride as a catalyst. About the method.
より詳細には、反応装置からの廃ガスを、反応生成物
を脱塩酸塔で処理して留出する未凝縮ガスとともに塩化
水素吸収塔で吸収させて回収する方法に関する。More specifically, the present invention relates to a method for recovering waste gas from a reaction apparatus by absorbing a reaction product together with an uncondensed gas distilled off by treating a reaction product in a dehydrochlorination tower in a hydrogen chloride absorption tower.
ビスフェノール化合物の工業的な製造においては、フ
ェノール類とカルボニル化合物とを塩化水素を触媒とし
て反応させる場合、反応の速度、反応収率から反応機内
の気相部には塩化水素ガスを飽和させておくのが好まし
い。In the industrial production of bisphenol compounds, when reacting phenols and carbonyl compounds with hydrogen chloride as a catalyst, the gas phase in the reactor is saturated with hydrogen chloride gas from the reaction rate and reaction yield. Is preferred.
そのため、塩化水素ガスを絶えず反応系に流入させる
必要があり、一方、不活性ガスの滞留を防止するために
反応系の気相部は排気しなければならないので、塩化水
素の一部は反応廃ガスとして排出されていた。Therefore, it is necessary to continuously flow hydrogen chloride gas into the reaction system.On the other hand, the gas phase of the reaction system must be evacuated to prevent stagnation of inert gas. It was emitted as gas.
従来、反応廃ガスは排ガス洗浄塔を通して含有されて
いる塩化水素を水酸化ナトリウム水溶液に吸収させてい
た。しかしながら、反応機よりでる排ガスの量は反応機
がバッチ反応であるため流量がバラツキ、中和操作が困
難である。また、この処理で中和されたとしても、反応
廃ガス中の塩化水素ガスは全て廃棄されるため、損失と
なる塩化水素ガス量は増加する。Conventionally, the reaction waste gas has absorbed hydrogen chloride contained in an aqueous sodium hydroxide solution through an exhaust gas washing tower. However, since the reactor is a batch reaction, the flow rate of the exhaust gas from the reactor varies, and the neutralization operation is difficult. Further, even if neutralized by this treatment, all the hydrogen chloride gas in the reaction waste gas is discarded, so that the amount of hydrogen chloride gas that is lost increases.
本発明の課題は、上記の問題点を解決すべくなされた
ものであり、フェノール類とカルボニル化合物とを塩化
水素を触媒として反応させて製造するに際し、反応装置
より排出される廃ガスに含有されている塩化水素を有効
に回収する方法を提供することにある。The object of the present invention has been made to solve the above problems, and is contained in waste gas discharged from a reactor when producing by reacting phenols and carbonyl compounds with hydrogen chloride as a catalyst. It is an object of the present invention to provide a method for effectively recovering hydrogen chloride.
本発明者らは、上記課題を解決するための鋭意検討し
遂に本発明に到った。Means for Solving the Problems The present inventors have diligently studied to solve the above-mentioned problems, and finally arrived at the present invention.
即ち本発明は、 塩化水素を触媒としてフェノール類及びカルボニル化
合物からビスフェノール化合物を製造するに際し、反応
装置より排出されるガスを反応生成物を脱塩酸塔で処理
して留出するガスとともに塩化水素吸収塔で処理して、
反応装置から排出される廃ガスに含まれる塩化水素を塩
化水素回収工程内に回収する方法である。That is, in the present invention, in producing a bisphenol compound from phenols and carbonyl compounds using hydrogen chloride as a catalyst, the gas discharged from the reactor is treated with a reaction product in a dehydrochlorination column to absorb hydrogen chloride together with the gas distilled off. Processed in the tower,
In this method, hydrogen chloride contained in waste gas discharged from the reactor is recovered in a hydrogen chloride recovery step.
以下、図面により本発明の方法の一態様を説明する。 Hereinafter, one embodiment of the method of the present invention will be described with reference to the drawings.
第１図は、本発明の方法によりフェノール及びアセト
ンから、塩化水素を触媒としてビスフェノールＡを製造
するに際し、反応装置より排出される廃ガスを、生成物
を脱塩酸塔で処理して留出するガスとともに塩化水素吸
収塔で処理して塩化水素を塩化水素回収工程に回収する
方法の一態様を示す工程系統図である。FIG. 1 shows that when producing bisphenol A from phenol and acetone using hydrogen chloride as a catalyst by the method of the present invention, the waste gas discharged from the reactor is treated and distilled in a dehydrochlorination column. It is a process system diagram which shows one aspect of the method of collect | recovering hydrogen chloride in a hydrogen chloride collection process by treating with a hydrogen chloride absorption tower with gas.
フェノール１、アセトン２及び触媒の塩化水素３を反
応器４に装入しビスフェノールＡの合成を行なう。反応
液５はリボイラー６のついた脱塩酸塔７にフィードさ
れ、塩化水素、塩酸、未反応アセトンおよび未反応フェ
ノールの一部を減圧下に留出させて凝縮器８へ送る。こ
の未凝縮成分の留出ガス９と反応器４より排出される廃
ガス10の流通ラインを合流させて、塩化水素ガスを以降
の塩化水素回収系で回収する。Phenol 1, acetone 2 and hydrogen chloride 3 as a catalyst are charged into a reactor 4 to synthesize bisphenol A. The reaction liquid 5 is fed to a dehydrochlorination tower 7 equipped with a reboiler 6, and a part of hydrogen chloride, hydrochloric acid, unreacted acetone and unreacted phenol is distilled off under reduced pressure and sent to a condenser 8. The distillate gas 9 of the uncondensed component and the flow line of the waste gas 10 discharged from the reactor 4 are joined, and the hydrogen chloride gas is recovered in the subsequent hydrogen chloride recovery system.
本発明の方法により、ビスフェノール製造プロセスの
反応工程に装入される塩化水素ガスは殆ど全て、塩化水
素回収工程の中に回収され、使用する塩化水素の損失を
低減させることができる。また、反応廃ガスを直接廃棄
しないので排水の問題も極めて少なくなった。According to the method of the present invention, almost all of the hydrogen chloride gas charged to the reaction step of the bisphenol production process is recovered in the hydrogen chloride recovery step, and the loss of hydrogen chloride used can be reduced. In addition, since the reaction waste gas is not directly discarded, the problem of drainage is extremely reduced.
以下、実施例により本発明を説明する。 Hereinafter, the present invention will be described with reference to examples.
実施例−１ 第１図に於てビスフェノールＡの製造設備の反応器４
より排出される廃ガス10の流量は18.1kg/Hであり、その
成分流量は次の様であった。Example 1 Reactor 4 of the bisphenol A production facility shown in FIG.
The flow rate of the discharged waste gas 10 was 18.1 kg / H, and the component flow rates were as follows.
塩化水素 16.5kg/H フェノール 0.2kg/H アセトン 1.1kg/H 水 0.2kg/H 非凝縮性ガス 0.1kg/H （計） 18.1kg/H この廃ガスを、脱塩酸塔７の凝縮器８からの未凝縮ガ
ス９ 塩化水素 76.4kg/H フェノール 7.1kg/H アセトン 0.7kg/H 水 13.7kg/H 非凝縮性ガス 0.1kg/H （計） 98.0kg/H と合体させて次の組成のガス11を得た。Hydrogen chloride 16.5 kg / H Phenol 0.2 kg / H Acetone 1.1 kg / H Water 0.2 kg / H Non-condensable gas 0.1 kg / H (total) 18.1 kg / H This waste gas is discharged from the condenser 8 of the dehydrochlorination tower 7. Non-condensable gas 9 Hydrogen chloride 76.4 kg / H Phenol 7.1 kg / H Acetone 0.7 kg / H Water 13.7 kg / H Non-condensable gas 0.1 kg / H (Total) 98.0 kg / H Combined gas with the following composition I got 11.
塩化水素 97.67kg/H フェノール 7.23kg/H アセトン 1.78kg/H 水 14.69kg/H 非凝縮性ガス 1.71kg/H （計） 118.08kg/H このガスを吸収塔12に装入した。Hydrogen chloride 97.67 kg / H Phenol 7.23 kg / H Acetone 1.78 kg / H Water 14.69 kg / H Non-condensable gas 1.71 kg / H (Total) 118.08 kg / H This gas was charged into the absorption tower 12.
吸収塔12からの留出ガス13の組成は下記の通りであ
る。The composition of the distillate gas 13 from the absorption tower 12 is as follows.
塩化水素 0.2kg/H フェノール 0.0kg/H アセトン 0.1kg/H 水 8.0kg/H （計） 8.3kg/H 従来ロスしていた塩化水素の99.7％が回収されたこと
になる。Hydrogen chloride 0.2 kg / H Phenol 0.0 kg / H Acetone 0.1 kg / H Water 8.0 kg / H (Total) 8.3 kg / H 99.7% of hydrogen chloride that had been lost in the past was recovered.
またこれに伴い、従来排水処理を要していた塩化水素
分16.5kg/H、フェノール0.2kg/H、アセトン1.1kg/Hが排
水処理を要さなくなり、その費用が節減された。Along with this, 16.5 kg / H of hydrogen chloride, 0.2 kg / H of phenol, and 1.1 kg / H of acetone, which previously required wastewater treatment, no longer require wastewater treatment, and costs were reduced.
本発明は、上記した構成をとるので、ビスフェノール
化合物を製造するに際し、従来廃棄されていた廃ガスか
ら塩化水素を回収可能とし、強酸性の排水の処理費用を
節減できる。Since the present invention adopts the above-described configuration, hydrogen chloride can be recovered from waste gas that has been conventionally discarded when producing a bisphenol compound, and the cost of treating strongly acidic wastewater can be reduced.
第１図は、本発明に係る塩酸回収方法の一例を示す工程
系統図である。 ４……ビスフェノールＡ反応器 ７……脱塩酸塔 12……吸収塔FIG. 1 is a process flow chart showing an example of the method for recovering hydrochloric acid according to the present invention. 4 Bisphenol A reactor 7 Dehydrochlorination tower 12 Absorption tower
Claims (1)
ルボニル化合物からビスフェノール化合物を製造するに
際し、反応装置からの廃ガスを、反応生成物を脱塩酸塔
で処理して留出する未凝縮ガスとともに塩化水素吸収塔
で吸収させることを特徴とするビスフェノール化合物製
造廃ガスから塩化水素の回収方法In producing bisphenol compounds from phenols and carbonyl compounds using hydrogen chloride as a catalyst, waste gas from a reactor is treated together with uncondensed gas distilled off by treating a reaction product in a dehydrochlorination column. Method for recovering hydrogen chloride from waste gas for producing a bisphenol compound, characterized by being absorbed in a hydrogen absorption tower
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2158764A JP2939306B2 (en) | 1990-06-19 | 1990-06-19 | Method for recovering hydrogen chloride from waste gas from bisphenol compound production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2158764A JP2939306B2 (en) | 1990-06-19 | 1990-06-19 | Method for recovering hydrogen chloride from waste gas from bisphenol compound production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0448917A JPH0448917A (en) | 1992-02-18 |
| JP2939306B2 true JP2939306B2 (en) | 1999-08-25 |
Family
ID=15678830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2158764A Expired - Fee Related JP2939306B2 (en) | 1990-06-19 | 1990-06-19 | Method for recovering hydrogen chloride from waste gas from bisphenol compound production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2939306B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100584766C (en) * | 2008-05-20 | 2010-01-27 | 吴春森 | Full- desorption system for hydrochloride |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111606305B (en) * | 2020-06-17 | 2022-02-18 | 山东默锐科技有限公司 | Refining method of byproduct hydrochloric acid in industrial organic synthesis |
-
1990
- 1990-06-19 JP JP2158764A patent/JP2939306B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100584766C (en) * | 2008-05-20 | 2010-01-27 | 吴春森 | Full- desorption system for hydrochloride |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0448917A (en) | 1992-02-18 |
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