RU2005108057A - METHOD FOR PRODUCING LACTIDE - Google Patents

METHOD FOR PRODUCING LACTIDE Download PDF

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Publication number
RU2005108057A
RU2005108057A RU2005108057/04A RU2005108057A RU2005108057A RU 2005108057 A RU2005108057 A RU 2005108057A RU 2005108057/04 A RU2005108057/04 A RU 2005108057/04A RU 2005108057 A RU2005108057 A RU 2005108057A RU 2005108057 A RU2005108057 A RU 2005108057A
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RU
Russia
Prior art keywords
lactide
stream
gaseous
inert
reactor
Prior art date
Application number
RU2005108057/04A
Other languages
Russian (ru)
Other versions
RU2301230C2 (en
Inventor
Валерий Федорович Швец (RU)
Валерий Федорович Швец
Роман Анатольевич Козловский (RU)
Роман Анатольевич Козловский
Светлана Викторовна Счастлива (RU)
Светлана Викторовна Счастливая
Елена Станиславовна Варламова (RU)
Елена Станиславовна Варламова
Михаил Глебович Макаров (RU)
Михаил Глебович Макаров
Дмитрий В чеславович Староверов (RU)
Дмитрий Вячеславович Староверов
Юрий Павлович Сучков (RU)
Юрий Павлович Сучков
Original Assignee
Российский химико-технологический университет им.Д.И. Менделеева (RU)
Российский химико-технологический университет им. Д.И. Менделеева
Priority date (The priority date 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 date listed.)
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Application filed by Российский химико-технологический университет им.Д.И. Менделеева (RU), Российский химико-технологический университет им. Д.И. Менделеева filed Critical Российский химико-технологический университет им.Д.И. Менделеева (RU)
Priority to RU2005108057/04A priority Critical patent/RU2301230C2/en
Publication of RU2005108057A publication Critical patent/RU2005108057A/en
Application granted granted Critical
Publication of RU2301230C2 publication Critical patent/RU2301230C2/en

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  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)

Claims (2)

1. Способ получения лактида жидкофазной деполимеризацией олигомеров молочной кислоты в присутствии соединений олова при повышенной температуре и нормальном давлении и удалении лактида с потоком газообразных веществ за счет непрерывной подачи инертного газообразного вещества в реакционную массу с последующим выделением лактида из потока абсорбцией растворителем, отличающийся тем, что в реакционную массу непрерывно подают поток инертного жидкого органического вещества, а поток газообразных веществ, выходящий из реактора, после отделения из него основного количества газообразного лактида и инертного органического вещества в полном объеме возвращают в реактор.1. The method of producing lactide by liquid-phase depolymerization of oligomers of lactic acid in the presence of tin compounds at elevated temperature and normal pressure and removing lactide with a gaseous stream by continuously feeding an inert gaseous substance into the reaction mass, followed by lactide separation from the stream by solvent absorption, characterized in that a stream of inert liquid organic matter is continuously fed into the reaction mass, and a stream of gaseous substances leaving the reactor after The main quantity of gaseous lactide and inert organic matter from it is returned to the reactor in full. 2. Способ по п.1, отличающийся тем, что процесс деполимеризации осуществляют в присутствии ди- и триалкилфенолов, взятых в количестве 0,001-0,1 мас.% по отношению к олигомеру молочной кислоты.2. The method according to claim 1, characterized in that the depolymerization process is carried out in the presence of di- and trialkylphenols taken in an amount of 0.001-0.1 wt.% With respect to the lactic acid oligomer.
RU2005108057/04A 2005-03-23 2005-03-23 Method for preparing lactide RU2301230C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU2005108057/04A RU2301230C2 (en) 2005-03-23 2005-03-23 Method for preparing lactide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU2005108057/04A RU2301230C2 (en) 2005-03-23 2005-03-23 Method for preparing lactide

Publications (2)

Publication Number Publication Date
RU2005108057A true RU2005108057A (en) 2006-09-10
RU2301230C2 RU2301230C2 (en) 2007-06-20

Family

ID=37112258

Family Applications (1)

Application Number Title Priority Date Filing Date
RU2005108057/04A RU2301230C2 (en) 2005-03-23 2005-03-23 Method for preparing lactide

Country Status (1)

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RU (1) RU2301230C2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2471791C2 (en) * 2007-09-03 2013-01-10 Уде Инвента-Фишер ГмбХ Method of cleaning process streams during production of dilactide or polylactide
RU2541567C2 (en) * 2008-08-29 2015-02-20 Уде Инвента-Фишер ГмбХ Method of obtaining mixture of lactide derivatives
RU2631110C1 (en) * 2016-12-20 2017-09-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) Method for l-lactide obtaining

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2374895A4 (en) * 2008-12-26 2013-03-06 Toray Industries Method for producing lactic acid and method for producing polylactic acid
EP2675539B1 (en) * 2011-02-18 2015-07-08 Sulzer Chemtech AG Method for the manufacture of a polyhydroxy-carboxylic acid
EP2508548B1 (en) * 2011-04-05 2014-10-15 PURAC Biochem BV Method for removal of the cyclic diester of a 2-hydroxy alkanoic acid from a vapor
CN104080833B (en) * 2011-11-04 2016-05-11 蒂森克虏伯工业解决方案股份公司 For the attribute test of polymerizable lactic acid with and production method
RU2531942C1 (en) * 2013-05-22 2014-10-27 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Национальный исследовательский Томский государственный университет" Chamber module for glycolide and lactide synthesis reactor
MY179674A (en) * 2014-09-17 2020-11-11 Sulzer Chemtech Ag A method for stabilizing a condensed phase composition including a cyclic ester in a process of manufacturing a polyester or of lactide

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2471791C2 (en) * 2007-09-03 2013-01-10 Уде Инвента-Фишер ГмбХ Method of cleaning process streams during production of dilactide or polylactide
RU2541567C2 (en) * 2008-08-29 2015-02-20 Уде Инвента-Фишер ГмбХ Method of obtaining mixture of lactide derivatives
RU2631110C1 (en) * 2016-12-20 2017-09-19 Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский химико-технологический университет имени Д.И. Менделеева" (РХТУ им. Д.И. Менделеева) Method for l-lactide obtaining

Also Published As

Publication number Publication date
RU2301230C2 (en) 2007-06-20

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MM4A The patent is invalid due to non-payment of fees

Effective date: 20090324

NF4A Reinstatement of patent

Effective date: 20101120

MM4A The patent is invalid due to non-payment of fees

Effective date: 20140324