TWI229097B - Adsorber system to replace water column in a polyester process - Google Patents
Adsorber system to replace water column in a polyester process Download PDFInfo
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- TWI229097B TWI229097B TW090130369A TW90130369A TWI229097B TW I229097 B TWI229097 B TW I229097B TW 090130369 A TW090130369 A TW 090130369A TW 90130369 A TW90130369 A TW 90130369A TW I229097 B TWI229097 B TW I229097B
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D19/0042—Degasification of liquids modifying the liquid flow
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
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Description
1229097 A7 B7 五、 發明説明(!) 相關申請案之前後參照 本申 請案主張2000年12月7曰申請之美國臨時專利 中 請 案 第 60/2 54,040號之優先權,該案之全文以引用的方式併 入 本 文 中〇 發明範. 本發 明一般係關於聚酯製程及裝置,更明確言之 係 關 於 無水塔及其他蒸餾系統組件之存在下,包括吸附 系 統 之 聚 酯製 程及裝置。 - 發明背景 當製 造聚酯之商業變得愈加競爭時,極需要替代 之 降 低 成 本製 造程序和裝置。已發展出各種製程和裝置, 缺 而 此 等系 統含有複雜而昂貴之設計,以致不鸫迅速建 造 或 安 裝 。彼 等亦需要昂貴之專門技能來適當維護和,操作 〇 舉例 而 言 , 在一般之聚酯加工處理設施中,為了不同之 g 的 J 一 個反 應器系統一般含有一系列的蒸餾塔,回收可 能 包 含 在 自聚 酯製造程序產生之各種流體流中未起反應之 二 羥 基 化 合物 〇 一般 之蒸餾系統可能包括水塔、汽提塔及一個MGM塔( 混 合 之二 醇和單體塔或乙二醇冷凝液塔)。通常,將來 白 一 或 數個反 應器之流體流送至水塔中。在該處,將水與 二 醇 或 其 他二 經基化合物分離。將低沸點物例如水在塔之 頂 上 移 出 並送 至汽提塔,而二羥基化合物例如二醇和其他 高 沸 點 物 在塔 之底部移出,在該處可將彼等送回至反應器 系 統 或 替 代, 送至儲存設施,汽提塔在其頂上分離出各種 組 份 , -4- 本紙張尺度適用中國國家標準(CNS) A4規格(210 x 297公釐)
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1229097 A7
例如=一二号燒(可將它送至廢水處理設施)。 此等設施是複雜而昂貴之罝 之*門以+ 、 其另外需要甚大數量 ::間以便適當女裝和操作。因此,該項技蓺中須要較低 成本,較簡單之裝置和製程以便自可 衣、低 生之流體流中分離並回收未起/ ♦醋‘造程序產 个、汉應之一羥基化合物。 在=:中’本發明提供用於自自聚醋製造程序中產 之机體机中分離並回收二經基北合物之程序和裝置。更 明確言之’本發明提.供在水塔和其他蒸館裝置不存在時使 用-種吸附系統而提供用於回收二經基化合物之更密緻和 成本效盈之方法。如所指明# ’使用根據本發明之吸附系 統在製造聚酯t程序中可減少或排除需要大量$、設備、 槽、擾拌器、泵及其類似物。 因此,在第一方面,本發明提供自自製備聚酯時所產生 之流體流中回收二羥基化合物之方法包括下列步驟··(幻提 供具有内部容積之反應器其中至少一部份的内容積為反應 混合物(其包括至少一種二羧酸或其酯及至少一種二羥基化 合物)所充滿;(b)在反應器中將至少一種二羧酸或其酯類 連同至少一種二羥基化合物酯化或轉酯化而藉以產生:( 一種酯化羞物或轉酯化暴物及(Π)包括至少一種二羥基化合 物之流體流及(c)使自步驟(b)的酯化或轉酯化反應所產生 之流體流歷經吸附系統而選擇性回收二經基化合物。 在第二方面,本發明提供自自製備聚酯聚合物時所產生 之流體流中回收二羥基化合物之方法包括下列步驟··( a)提 -5- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 裝 訂
線 1229097 A7 B7 五、發明説明(3 ) 供具有内部容積之反應器,其中至少一部份的内部容積為 聚酯單體所充滿;(b)聚縮合聚酯單體而產生聚酯聚合物及 包括二羥基化合物之流體流;及(c)使自聚縮合反應所產生 之流體流歷經吸附系統而選擇性回收二羥基化合物。 在第三方面,本發明提供自自製備聚酯聚合物時所產生 之流體流中回收二羥基化合物之方法包括下列步驟··( a)提 供具有第一内部容積之第一反應器,其中至少一部份的第 一内部容積為包括至少一種二叛-酸組份和至少一種二經基 化合物組份之反應混合物所充滿;(b)將至少一種二繞酸組 份連同至少一種二羥基化合物酯化或轉酯化而產生(i) 一種 酯化產物或轉酯化產物及(Π)包括二羥基化合物之第一流體 流;(C)提供與第一反應器呈流體連通之具有第二内部容積 之第二反應器其中至少一部份的第二内部容積為步驟(b)的 酯化或轉酯化產物所充滿;(d)將步驟(C)之酯化或轉酯化 產物聚縮合而產生聚酯聚合物及包括二羥基化合物之第二 流體流及(e)使來自步驟(b)之第一流體流及來自步驟(d)之 第二流體流歷經吸附系統而選擇性回收二羥基化合物。 在更另外方面,本發明另外提供自自製聚酯時所產生之 流體流中回收二經基化合物之方法包括下列步驟:(a)提供 具有内部容積之反應器,其中至少一部份的内部容積為包 括至少一種二羧酸或其酯及至少一種二羥基化,合物之反應 混合物所充滿;(b)在反應器中將至少一種二羧酸或其酯連 同至少一種二羥基化合物酯化或轉酯化而藉以產生:(i)酯 化產物或轉酯化產物及(ii)包括至少一種二羥基化合物之流 -6- 本紙張尺度適用中國國家標準(CNS) A4規格(210X 297公釐) 1229097 A7 B7
五、發明説明(4 體流及(C)於無水塔之存在下,使自步驟(b)的酯化或轉酿 化反應所庳生之流體流歷經吸附系統而選擇性回收二經基 化合物。 本發明的另外優點和具體實施例自下列敘述將顯然可見 或可經由應用本發明而了解。本發明的另外優點亦可藉所 附隨之申請專利範圍中特別指出之部份和組合予以實現和 達成。因此,應了解的是:前述之一般敘述及後繼之詳細 敘述兩者是本發明某些具體實施-例的例示和解釋並非限制 所申請專利之本發明。 圖式之簡述 為了更清楚了解本發明,現在僅經由例示,參照附隨之 圖1,此圖顯示適合使用於實施本發明的一具體實施例之特 殊裝置和組態。 發明之詳述 本發明經由參照下列之詳述及本文中所提供之任何實例 而可更容易了解。亦,應了解的是:本發明不限於下述之 特定具體實施例和方法,當然,特定組份及/或條件可變 更。此外’本文中所使用之術語僅係為了敘述本發明之特 別具體實施例的目的而使用,並無意欲以任何方式A斤 制0 * . · 又又 亦應注意的是,如使用於說明書及附隨之申請專利範圍 中者,除非在其他情況’上下文中清楚指示,單數开I式 “ a”,“ an”和“ the”包括複數概念。舉例而言,以單數述及 一組份意欲包括許多組份。
本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐) 1229097 A7
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線 1229097
所產生之流體流歷經吸附系統而選擇性回收二羥基化合 物。 在第二具體實施例中,本發明提供自自製備聚酯聚合物 時所產生之流體流中回收二羥基化合物之方法包括下列步 驟·( a)提供具有内部容積之反應器,其中至少一部份的内 部谷積為聚酷單體所充滿;(b)聚縮合聚酯單體而產生聚酯 聚合物及包括二羥基化合物之流體流;及(c)使自聚縮合反 應所產生之流體流歷經吸附系統呲選擇性回收二羥基化合 物。 在另外第三具體實施例中,本發明提供自自製備聚酯聚 合物時所產生之流體流中回收二羥基化合物之方法包括下 列步驟:(a)提供具有第一内部容積之第一反應器,其中至 少一部份的第一内部容積為包括至少一種二绞酸組份和至 少一種二羥基化合物組份之反應混合物所充滿;(b)將至少 一種二羧酸組份連同至少一種二羥基化合物組份酯化或轉 §曰化而產生(1) 一種酯化產物或轉酯化產物及(Η)包括二羥 基化合物之第一流體流;(c)提供與第一反應器呈流體連通 之具有第二内部容積之第二反應器其中至少一部份的第二 内部容積為步驟(b)之酯化或轉酯化產物所充滿;(幻將步 驟(c)之酯·化或轉酯化產物聚縮合而產生聚酯聚合物及包括 一經基化合物之第二流體流及(e)使來自步驟(b)之第一流 體流及來自步驟(d)之第二流體流歷經吸附系統而選擇性回 收二Μ基化合物。 亦應瞭解··可將本發明的程序和裝置連同任何所熟知, -9 -
1229097 A7 --— —______B7 五、發明説明(7 ) 形成聚酯之程序而使用。因此,如說明書和所附隨之申請 專利範圍中所使用者,成語‘‘聚酯程序,,係關於酯化程序、 酯交換程序或甚至聚縮合程序。或者,經更進一步所考慮 者·根據本發明之聚酯程序可包括(1)酯反應程序及/或酯 交換私序及(2)聚縮合反應程序的組合。因此,本發明的聚 酉曰程序可能是用於形成聚酯單體、聚酯募聚物及/或聚酯同 元聚合物及/或共聚物之任何所熟知程序。 關於此點,應瞭解:如本文中所使用者,術語“聚酯,,意 奴包括任何所熟知之聚酯衍生物,包括(但不限於)聚醚酯 類、聚醋醯胺及聚醚酯醯胺。因此,為了簡化,遍歷說明 書和申请專利範圍、術語聚酯、聚醚酯、聚酯醯胺和聚醚 醋si胺可互換使用而一般稱為聚酯、但是當然,特別聚酯 物種係以原料為基準,即:聚酯前驅體反應物尽/或組份。 如本文中所使用者,術語“酯化程序,,或“酯化反應,,係關 於一種聚酯製程其中使具有酸官能度之反應物例如一種二 幾酸起反應而產生聚酯產物。同樣地,如本文中所使用 者’術語酯交換程序或酯交換反應係關於一種聚酯製程其 中’使具有一個烧基端基.例如曱基端基之反應物起反應而 產生聚酯產物。因此,為了簡化,遍歷說明書和所附隨之 申请專利範圍、術語醋化反應和酯交換可互換使用且一般 稱為s旨化反應,但是當然,酯化反應或酯交換係以原料為 基準。 另外,關於酯化反應或酯交換程序,包括一或數種整合 程序特徵在本發明的範圍以内。舉例而言,在一具體實施 -10- 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐) 裝 訂
線 1229097 A7
例中’酯化程序可包括一個酯化反應器 '然而,在另外具 體實施例中,s旨化程序可能包括—種系統或串冑、並料 以構形之系列的酯化反應器,或其組合,因此,在另外具 體貫施例巾’醋化程序可包括兩或數個g旨化反應器,所有 之反應裔以相互呈流體連通較佳。 如本文中所使用者,術語“聚縮合”意指關於用於形成募 聚物及/或聚合物之任何所熟知程序。舉例而言,在一個具 體實施例中,根據本發明之聚縮+程序是用於寡 聚物及/或聚醋聚合物之程序。 而且,以與如上文中先前所界定之酯化程序的相似方 式,聚縮合程序亦可包括一或數個分開及/或整合程序特 徵。舉例而言,在一具體實施例中,聚縮合程序可包括一 個聚縮合反應器。然而,在另外具體.實施例中,聚縮合程 序可包括一種系統或串聯、並聯予以構形之系列的兩或數 個聚縮合反應器或其組合。因此,在第二具體實施例中, 本發明的聚縮合程序可包括兩或數個聚縮合反應器,所有 之反應器以相互呈流體連通較佳。在更另外之具體實施例 中’聚縮合程序包括與後縮聚器或聚合物反應器呈流體相 通之第一預聚物或募聚物聚縮合反應器。 因此之故,如本文中所使用者,術語“預聚物反應器,,或 “募聚物反應器’’意指關於第一聚縮合反應器。雖然並不需 要,但是一般將預聚物反應器保持在真空下。通常熟諸此 藝者可了解:時常使用預聚物反應器(無限制)來起始生長 預聚物鏈自大致1至5之饋入長度至大致4至30之出口長度。 -11 - 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐)
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線 1229097 五、發明説明( 與/匕有關,如本文中所使用之,術語“後縮聚器反應器” 或‘‘聚合物反應器,,意指關於聚縮合反應系統的最後熔化 相再者,雖然並不需要,時常將第二聚縮合或後縮聚器 反應器保持在真空下。而且,通常熟諳此藝者亦應了解: 一般使用後縮聚器反應器來生長聚合物鏈至所需要之最後 長度。 如,歷說明書及所附隨之中請專利範圍所使用者,術語 反應器意指關於如上述,適合使用於聚醋製程中之任何所 熟知反應器。如所述之反應器,適合連同本發明之程序和 f置而使用之適當反應器是經構形而界定内部容積之反應 5 ’其中在任何指定之聚酯製程期間,至少一部份反應器 之内部體積為反應混合物所充滿。 適合連同本發明的程序而使用之適當反應器實例包括(並 無限制)一種管式反應器例如2000年12月7日申請之美國臨時 專利申請案第6〇/254,〇4〇中所揭示及2〇〇丨年12月7曰申請之 “使用管式反應器之低成本聚酯製程,,之美國實用專利申請 案,為了所有目的,該案之全文以引用的方式併入本文 中。在替代具體實施例中,本發明可使用下列各種反應器 予以實施:連續授拌槽反應器、反應性蒸鶴塔、授摔管形 反應器、熱虹吸反應器、強制循環反應器、滴流床反應器 及供使用於化學劑製造程序中之任何其他反應器或反應器 機構。而且,亦應了解:將本文中所特舉出之任何一或數 種反應器予以構形以便使用於連續、分批或半分批式製造 聚酯之程序中亦在本發明的範圍以内。 -12- 本紙張尺度適财g S家標準(CNS) A4規格(2ι〇 x 297公爱) 裝 訂 線 1229097 A7 B7 五、發明説明(10 ) 如本文中所使用者,術語或成語“流體,,或“流體流,,意指 關於存在在聚醋製造程序反應器系統任何區域中或自其任 何區域所產生之任何液體、蒸氣或氣體,或其混合物。舉 例而言(並無限制),根據本發明之流體流可來自CSTR反應 器及/或管式反應器。同樣地,流體流可來自酯化或酯交換 反應器、聚縮合反應器或其組合,因為那個原因,流體或 流體流可能是不含顯著數量的聚g旨反應產物之任何過量流 體流。 - 供使用於本發明中之適當二羧酸包括較佳具有8至14個碳 原子之务知一竣酸,較佳具有4至12個碳原子之脂族二幾酸 或較佳具有8至12個碳原子之環脂族二羧酸。二羧酸的特定 實例包括對苯二甲酸、鄰苯二酸、,間苯二,酸、莕'卜二叛 酸、環己烷二羧酸、環己烷二醋酸、二苯基_4,4,-二緩酸、 二苯基-3,4’-二羧酸、琥珀酸、戊二酸、己二酸、壬二酸、 癸一酸’其混合物及其類似物。 同樣地,根據本發明之適當二羥基化合物包括較佳具有6 至20個碳原子之環脂族二醇或較佳具有3至20個碳原子之脂 族二醇。此等二醇之特定實例包括乙二醇、二甘醇、三甘 醇、1,4-環己烷-二曱醇、丙-;ι,3·二醇、丁 - 1,4_二醇、戊_ 1,5-二醇、己-1,6-二醇、新戊二醇、3-甲基戊二醇·(2 4)、 2-甲基戊二醇-(1,4)、2,2 4-三甲基戊二醇-(1,3)、乙基己 二醇 _(1,3)、2,2-二乙基丙·二醇-(1,3)、己二醇-(ΐ,3)、 二-(經基乙氧基)-苯、2,2-雙(4-羥基環己基)-丙烷、κ 二羧基-1,1,3,3-四甲基-環丁烷、2,2,4,4-四甲基環丁二醇、 -13- 本纸張尺度適用中國國家標準(CNS) Α4規格(210X297公釐)
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線 1229097 A7 B7 五、發明説明(^ 2,2-雙(3·經基乙氧基苯基)_丙烧、2,2_雙_(4_㈣丙氧基苯 )丙、元’、山梨化物(is〇s〇rbide)、氫i昆,其混合物及其 類似物。 八 口 八 適^二羧酸共單體包括(並無限制):芳族二羧酸、脂族 二羧酸、脂族或芳族二羧酸之酯類、脂族或芳族二羧酸酯 之酸針、及其混合物。在一具體實施例中,最好:適當二 羧酸共單體包括較佳具有8至14個碳原子之芳族二羧酸、較 f具有4至12個碳原子之脂族二羧酸,或較佳具有8至12個 碳原子之環脂族二繞.酸。因為此原因,適當二羧酸共單體 之更特定實例包括對苯二甲酸、鄰苯二酸、間苯二酸、莕_ 2,6-二羧酸、環己烷二羧酸、環己烷二醋酸、二苯基 二羧酸、二苯基'4,-二羧酸、琥拍酸、戊二酸、己二酸、 壬二酸、癸二酸,其混合物及其類似物。 適當二羥基共單體包括(並無限制):脂族或芳族二羥基 化合物及其混合物。在一具體實施例中,最好:適當二羥 基共單體包括較佳具有6至20個碳原子之環脂族二醇或較佳 具有3至20個碳原子之脂族二醇。此類二醇共單體的更特定 實例包括乙二醇、二甘醇、三甘醇、M•環己烷-二曱醇、 丙-1,3-二醇、丁-1,4·二醇、戊-1,5-二醇、己-1,6-二醇、新 戊二醇-3-甲基戊二醇_(2,4)、2-曱基戊二醇_(1,4)、2,2,4_三 甲基戊二醇-(1,3)、2-乙基己二醇-(1,3)、2,2-二乙基丙-二醇 (1,3)、己二醇-(1,3)、丨,‘二(羥基乙氧基卜苯、2,2·雙羥 基環己基)-丙烧、2,4-二羥基- U,3,3-四曱基-環丁烷、 2,2,4,4-四甲基環丁二醇、2,2-雙-(3_羥基乙氧基苯基)·丙 -14-
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院、2,2-雙(4_羥基丙氧基苯基卜丙烷、*山梨化物 is〇s_lde:)、氫_、bds_(2,2_(續醯基雙)仏伸笨氧基 (乙醇),其混合物及其類似物。 如本文中所使用者,“吸附系統,,係關於以串聯、並聯或 二組合予以構形之一或數種吸附床系統,其設計係為了實 =轉移過1或未起反應之聚g旨程序反應物 '即:二經基化 °或水S曰耘序剎產物自流體相至在稍後時間予以解吸和 回收之吸附床的—或數個表面上·。為了此目的,供使用於 本發明程序中之適當吸附床該項技藝中係眾所周知且可購 :美國及全世界之許多公司。簡言之,根據本發明之吸附 系統較佳採用三或數個吸附床以便自流體流通過吸附、解 吸、和備用循環、各個相之組合或序列來選擇性吸附和解 吸(各)二羥基組份。 ,雖然可應用於任何化學程序,❻是本發明特別使用於自 製造聚酯程序中回收組份。為了此㈣,根據本發明之較 佳製造聚酯之程序包括(但不限於)製造pE丁、pETG (以 CHDM共單體所改質之PET)的同元聚合物和共聚物、完全 芳族或液體結晶之聚酯、生物可降解之聚酯(其包括丁二 醇、對苯二甲酸和己二酸、聚對苯二甲酸(環己烷-二亞甲 基)酯同元-聚合物和共聚物CHDM2同元聚合物和共聚物)及環己烷二羧酸二甲酯、脂族/芳族共聚酯及其混合物等之程 序。 使用吸附系統用以回收未起反應及/或過量反應物,或用 以回收來自製造聚酯之程序之副產物可有利地減少或排除 -15- 本紙張尺度適用中國國家標準(CNS) A4規格(210X297公釐)
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線 1229097
使用塔、設備、桶' 攪拌器 面’可使用少數簡單大管或桶 器替代彼等。於實施本發明時 熟諳此藝者顯然可見。 舉例而言,吸附系統可保存能量因為不需要存在於習見 之瘵餾塔中之回流步驟。而且,亦應了解··當與蒸餾系統 者比較時,吸收系統提供回收較純產物及較少之副產物。 舉例而言,在流體流包括液體及Λ或蒸氣乙二醇之流體流的 具體貝%例中,吸附系統可提供回收較純之乙二醇及甚少 (如有)之副產物例如水。這可能是一個顯著的優點,因為 如本文中將予討論,可將所回收之二羥基化合物例如乙二 醇循環回至反應器系統中之任何所需要位置,可至酯化或 酯父換反應器。另外,水的存在於酯化或酯交換反應器中 可顯著降低其中之反應速率。如所述,經由回收具有較低 水含量之二.基化合物並使用它於反應器系統中,可獲得 較咼之反應速率藉以容許使用較小之酯化或酯交換反應器 系統。 特別參照圖1 ’此圖舉例說明本發明之一個具體實施例, 其中顯示·供使用於實施本發明的特別具體實施例之裝 置。根據此具體實施例,提供包括第一、第二和第三吸附 床之吸附系統,其中第一,、第二和第三吸附床與自聚酯製 造程序所產生之流體流呈選擇性控制之流體相通。 在一個具體實施例中,使上述之第一、第二和第三吸附 床歷經至少一個連續循環包括:(a)(丨)第一相其包括使流體 、泵等,而在本發明的一方 ,一個壓縮器及兩個熱交換 ,數項另外之優點亦為通常 -16- 本纸張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)
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線 1229097 A7 ___B7_ 五、發明説明(14 ) 流通經一經完全解吸之第一吸附床直至該第一吸附床為來 自流體流之至少一種組份大體上所飽和;(Π)與步驟(a) (i) 之同時,經由使一惰性氣體流通經完全飽和之第二吸附.床 而完全解吸來自完全飽和之第二吸附床之至少一種組份; 及(iii)與步驟a( i)和a( ii)之同時,維持經完全解吸之第三吸 附床呈備用模式;(b) (i)第二相,其包括使流體流通經一經 完全解吸之第三吸附床直至第三吸附床為來自流體流之至 少一組份大體上飽和;(Π)與步騍b( i)之同時,經由使一種 f月性氣體之氣流通經完全飽和之第一吸附床而完全解吸來 自完全飽和之第一吸附床的至少一種組份;及(in)與步驟 b (i)和b (i i)之同時’維持經完全解吸之第二吸附床呈備用 模式,及(c) ( i)第三相其包括使流體流通幾經完全解吸之第 二吸附床直至第二吸附床為來自流體流之至少一種組份大 體上飽和,(ii)與步驟c( i)之同時,經由使一種惰性氣體的 氣流通經完全飽和之第三吸附床而完全解吸來自完全飽和 之第三吸附床之至少一種組份;及(Hi)與步驟(丨)和c( 之 同時,維持經完全解吸之第一吸附床呈備用模式。 亦應瞭解者:在一具體實施例中,如本文中所使用之術 語“備用模式,,係關於一種操作的模式其中,將吸附床維持 成為經完全解吸之吸附床,因此,包括二羥基化合物之流 體流不能通經其中。或者,在另外具體實施例中,可將以 備用模式正操作之吸附床同時以極少量的經包含在流體流 中之二羥基氣體/蒸氣及/或液體予以部份飽和或負載(此流 體流正自冷凝器出口)。因此,關於以備用模式操作之經完 -17-
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全解吸之吸附床,同時清洗 (包括)在本發明的範圍内。 、述及圖卜.如圖式中所示,將來自—或數個反應器之流體 流作為液流189饋入第一吸附器床m中及出口成為液流 190。關於此點,存在於流體流中之蒸氣或氣體通常係源自 S旨化反應器或酯交換應器。然而,亦經考慮:此等墓氣可 來自經設計來移除存在於循環流體中所夾帶之蒸氣(此等循 環流體正橫經Lt環路)得氣機構例如,·扣月: 曰申請之美國臨時專利φ t軎安·货< Λ r β Λ 兮〜Τ 〇月案弟6〇/254,040號中所揭示,該 案之全文以引用的方式併入本文中。在一具體實施例中, 流體流中之蒸氣或氣體包括乙二醇。 -般,存在於流體流中之液體可能源自聚縮合反應器及 可能自下列各物所產生之其他液流:泵沖洗、㈣封、直 空泵、蒸發器沖洗、中間冷凝器及其類似物以及豆混人 物。因此’在另外具體實施例中,存在於流體流中之液體 可包括液體乙二醇。 在較佳具體實施例中,液流19〇具有一個連續監測之儀器 它指示:何時欲被保留之.所需要組份正離開床層。可使用 用於連續監測氣流之任何所知儀器及/或構件例如裝 置’然而·,監測單-波長使用充分之經驗亦可能適當其 中,在已得到必須之經驗後,再導引氣流19〇可使用定時器 而為之,此外,監測可甚至經由實施人工抓取樣 以實 現。 直至且除非一種所需要之組份自吸附器出口,如經由監 冷凝器出口之流體流亦另外 -18-
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線 1229097 A7 ___— —__B7 五、發明説明(16 ) 測裝置所指示,將所有其他組份經由液流190送至液流 184。液流184通至一具熱分解裝置例如熱傳介質爐,熱氧 化器、觸媒氧化器或其類似物。一旦床1 8丨變得飽和及一種 所需要之組份開始至出口流19〇,然後將包括所需要組份之 流體流再引導至下一個吸收器床。 為了簡化之目的,為了使用相同圖式,現在將床1 8丨顯示 為一個經部份負載之床,它經由來自一或數個反應器之液 流1 89正予以飽和。吸附床1 82現在是下段中所述之完全飽 和床。吸附床1 83是一個經完全解吸之床。床1 8丨現在正被 飽和如上文中先前所述。 床182具有經由液流191供應至其中且係來自熱交換器ι88 之惰性氣體例如氮、二氧化碳、氫及其類似物之熱氣流(熱 交換器1 88正加熱惰性氣體之氣流)。應瞭解:可使用任何 便利之熱源例如水蒸氣、電力、熱氣或蒸氣、或熱液體例 如熱傳熱介質及其類似物,在另外具體實施例中,熱亦可 能在冷凝器液流187、189、192、193與液流191間予以交 換。此外本發明亦考慮:可使用習用之空氣對空氣熱交換 器以及固體床交換器。 惰性氣流之動力係來自壓縮器或鼓風機1 86唯可使用一引 入器裝置連同惰性補充氣流197。組件1 86的入口上之壓力 係由添加惰性氣體流197和循環氣流195予以維持。 進入床1 82中之熱惰性氣體解吸來自該床之各組份。或 者’可使用水蒸氣或其他熱可縮合之蒸氣,但是此蒸氣可 能降低出口氣流的純度且亦需要氣流之另外分離設備。熟 -19- 本紙張尺度適用巾a g家標準(CNS) A4規格(2齡297公爱) 裝 訂
線 1229097 A7 B7 五、發明説明(17 。曰名項技藝者了解:可控制氣流丨9丨之流體和溫度以便精確 解吸床:82而藉以分離經解吸之組份成為高純度,個別脈 衝。此等脈衝出口成為氣流192並可經由與氣流19〇中所使 用者相似之裝置予以監測。當將不需要之組份自床1 Μ中移 出而成為氣流192時,則切換一個3通閥或許多2通閥並將氣 流192經由氣流198再引導至熱氧化裝置(經由氣流18句。或 者’乳流192可通經一個非冷卻之冷凝器185並前進至氣流 184以便熱氧化。 當將所需要之組份·自床182中移出成為氣流192時,切換 各閥及氣流192進行至氣流199並入冷凝器185中。可將冷凝 裔185使用空氣、冷;東之水、冷;東之氣體、膨脹冷卻或為通 常熟諳此技藝之人士所熟知之用以冷卻之任何其他適當方 法予以冷卻。經冷卻之氣流199可能降低低於飽和溫度而以 蒸氣或氣體存在之大部份(如非全部)的所需要組份將自氣 流冷凝成為液體。然後將氣流187中之液體引導至適當儲存 容作為產物。然而,在替代具體實施例中,可將經冷凝 之二羥基組份直接循環回至反應器以便更進一步包括入製 備聚醋單體、募聚物或聚合物中。 一旦氣流192再度含有不需要之組份,則再度構形用以選 擇性導引氣流之裝置例如閥、開關或其他選擇控制或再導 引之设備以便氣流192進至熱氧化裝置。所需要組份與不需 要組份間之此選擇性導引、或切換程序繼續直至將床182完 全解吸,在此時,床1 82使成備用狀態。 氣流193中,流體流出口之冷凝器ι85亦可含有極少量的 -20- ί纸張尺度適用中國國家標準(CNS) A4規格(210X297公釐) ------------
裝 訂
線 1229097 A7 __ B7_ 五、發明説明(18 ) 欲被回收之所需要組份,但是通常它是低於冷凝器1 8 5的飽 和溫度。如所述,在一個具體實施例中,然後將氣流1 93送 至經完全解吸之床1 8 3。床1 8 3吸附所需要之組份藉以清洗 氟流19 3 ^然後氣流19 3自床1 8 3出口成為氣流19 4。將氣流 194以氣流195導引回至鼓風機或壓縮器1 86。氣流197另外 添加補足惰性氣體而維持恆定進口壓至壓縮器丨86。 一旦將床1 8 1飽和及將床1 82解吸,該床具有循環之功 能。因此,床181在循環中接替來182的位置;床182接替床 183的位置而床183接替床181之位置。因此,在第二相中, 將床181解吸、床1 82將是備用及/或吸附來自冷凝器i 85之 所需要之組份;而床183將為來自蒸氣流之至少一種組份所 飽和。一旦將床1 8 1解吸和將床1 8 3飽和,則床功能可循環 第三次而“相三,,可開始。 應瞭解:以系統尺寸及欲產生之產物為基準,可能必須 另外之增加。舉例而言,關於每一功能可能需要許多吸附 器床以及許多冷卻裝置、壓縮器、加熱器和熱交換器。 遍歷此說明書,引證各種出版物為了更完全敘述與本發 明相關之現代技術發展水岸,此等出版物之内容以引用的 方式併入本文中。 、雖然本發明已參照其某些具體實施例的特定細節予以敘 述仁疋並無思欲將此等細節視為針對本發明範圍之限 制,除去將本發明範圍包括在附隨之申請專利範圍中以外 達到其程度。 雖然本發明係關於較佳具體實施例予以敘述,但是並無 -21 -
1229097 A7 B7 五、發明説明(19 ) 意欲限制本發明的範圍所特舉之特別具體實施例,但是反 之,意欲包括此等替代,修正和同義語如同可包括在本發 明的要旨和範圍以内如所附隨之申請專利範圍所界定。舉 例而言,反應條件有甚多變更和組合,例如組份濃度、所 需要之溶劑、溶劑混合物、溫度及重要性排列,可使用它 來使自所述製程所獲得之產物純度及產率最適化。又,熟 諳此技藝者應了解:於實施本發明之程序時,僅需要適度 和例行實驗而使此等程序條件最適化。 -22- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)
Claims (1)
- A B c D 1229097 六、申請專利範圍 1· 一種用於自自製備聚酯時所產生之流體流中回收二羥基 化合物之方法,包括下列步驟: a) 提供具有内部容積之反應器其中至少一部份的内部 容積為包括至少一種二羧酸或其酯及至少一種二羥基化 合物之反應混合物所充滿; b) 在反應器中將至少一種二羧酸或其酯連同至少一種 二經基化合物酯化或轉酯化而藉以產生:(丨)酯化產物或 轉S旨化產物及(π)包括至少一售二羥基化合物之流體 流,及 c) 使來自步驟(b)的酯化或轉酯化反應所產生之流體流 歷經吸附系統而選擇性回收二羥基化合物。 2·如申請專利範圍第1項之方法,其中反應器是管式反應 器。 3·如申請專利範圍第1項之方法,其中反應器是連續攪拌 槽反應器。 4·如申請專利範圍第1項之方法,其中反應器是酯化反應 器或酯交換反應器。 5·如申請專利範圍第1項之方法,其中至少一種二羥基化 合物包括乙二醇。 6·如申請專利範圍第1項之方法,其中至少一種二羧酸化 合物包括對苯 二甲酸。 7·如申請專利範圍第1項之方法,其中步驟(c)之吸附系統 包括第一、第二和第三吸附床,其中第一、第二和第三 吸附床係與步驟(b)的流體流呈選擇性控制之流體相 -23- 本紙張尺度適用中國國家標準(CNS) A4規格(21〇 χ 297公釐) 1229097 A8 B8 C8 D8 六、申請專利範圍 通〇 8·如‘申請專利範圍第7項之方法,其中步驟(c)另外包括使 第一、第二和第三吸附床歷經至少一種連續循環具有·· d) (i)第一相,其包括使步驟(b)之流體流通經一經完 全解吸之第一吸附床直至該第一吸附床為來自步驟(b) 之流體流之至少一種組份大體上所飽和;(Π)與步驟d( i) 之同時’經由使一種惰性氣體流通經完全飽和之第二吸 附床而完全解吸來自完全飽和之第二吸附床之至少一種 組份;及(iii)與步驟d(i)和d(ii)之同時,維持經完全解 吸之第三吸附床呈備用模式; e) (i)第二相,其包括使步驟(b)之流體流通經一經完 全解吸之第三吸附床直至第三吸附床為來.自步驟(b)之 流體流之至少一種組份大體上飽和;(ii)與步驟e(i)之同 時’經由使一種惰氣體之氣流通經完全飽和之第一吸附 床而完全解吸來自完全飽和之第一吸附床的至少一種組 份;及(iii)與步驟e( i)和e( Η)之同時,維持經完全解吸 之第二吸附床呈備用模式;及 f) (i)第三相其包括使步驟(b)之流體流通經經完全解 吸之第二吸附床直至第二吸附床為來自步驟(b)之流體 流之至少一種組份大體上飽和;(ii)與步驟f(i)之同時, 經由使一種惰性氣體的氣流通經完全飽和之第三吸附床 而完全解吸來自完全飽和之第三吸附床之至少一種組 份;及(iii)與步驟f( i)和f(⑴之同時,維持經完全解吸 之第一吸附床呈備用模式。 -24 - 本紙張尺度適用中國國豕標準(CNS) A4規格(210X297公爱)裝 訂 A8 B8 C8 D81229097 六、申請專利範圍 其中步驟(b)之流體流包 9·如申請專利範圍第1項之方法 括洛氣。 其中該製程係在無水塔 10·如申請專利範圍第1項之方法 之存在下予以實施。 11. 一種用於自自製備聚酯聚合物 一〜* 了尸汁產生之流體流中回收 一羥基化合物之方法,包括下列步驟: 提供具有内部容積之反應器其中至少-部份的内部 谷積為一種聚酯單體所充滿;一 ,b)將聚醋單體聚縮合而產生—種聚醋聚合物及包括二 沒基化合物之流體流;及 c)使自聚縮合反應所產生之流體流歷經吸附系統而選 擇性回收二經基化合物。 ' 12. 如申凊專利範圍第丨丨項之方法,其中流體流包括一種液 體。 ' 13·如申请專利範圍第丨丨項之方法,其中該製程係在無水塔 之存在下予以實施。 ° 14· 一種用於自自製備聚酯聚合物時所產生之流體流中回吹 二羥基化合物之方法,包括下列步驟: a) 提供具有第一内部容積之第一反應器其中至少—部 份的第一内部容積為包括至少一種二羥酸組份及至少〜 種二羥基化合物組份之反應混合物所充滿; b) 將至少一種二羧酸組份連同至少一種二羥基化合物 組份酯化或轉酯化而產生;(丨)一種酯化產物或轉能化產 物及(ii)包括二羥基化合物之第一流體流; -25- 本纸張尺度適用中國國家標準(CNS) A4規格(21〇 X 297公釐)1229097 T申請專利範圍 C)提供與第一反應器呈流體連通之具有第二内部容積 之第二反應器其中一部份的第二内部容積為步驟(…之 酯化或轉酯化產物所充滿; d) 將步驟(b)之酯化或轉酯化產物聚縮合而產生一種聚 酯聚合物及包括二羥基化合物之第二流體流;及 e) 使來自步驟(b)之第一流體流及來自步驟(d)之第二 流體流歷經吸附系統而選擇性回收二羥基化合物。 15·根據申請專利範圍第14項之方法,其中第一流體流包括 洛氣及其中第二流體流包括液體。 16.根據申請專利範圍第14項之方法,其中該製程係在無水 塔之存在下予以實施。 -26- 本紙張尺度適用中國國家標準(CNS) A4規格(210 X 297公釐)
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