CN103121952B - Vinyl acetate preparation method - Google Patents
Vinyl acetate preparation method Download PDFInfo
- Publication number
- CN103121952B CN103121952B CN201110369578.0A CN201110369578A CN103121952B CN 103121952 B CN103121952 B CN 103121952B CN 201110369578 A CN201110369578 A CN 201110369578A CN 103121952 B CN103121952 B CN 103121952B
- Authority
- CN
- China
- Prior art keywords
- catalyzer
- vinyl acetate
- acetate
- reaction
- preparation
- 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.)
- Active
Links
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
The invention relates to a vinyl acetate preparation method which is mainly used for solving the problems of space time yield and low selectivity of the prior art. The method for preparing allyl acetate is adopted, reaction raw materials which consist of ethylene, acetic acid, oxygen and water are contacted with a catalyst so as to obtain a reaction product containing allyl acetate, wherein the catalyst takes SiO2, Al2O3 or a mixture thereof as a carrier, and load active components comprise metal palladium, metal gold and alkali metal acetate; and the catalyst comprises 1-12g/L of palladium, 0.1-9g/L of gold and 10-90g/L of alkali metal acetate. The method is characterized in that the average crystal grain diameters of palladium and gold are between 4 and 9nm, and crystal grains with the average crystal grain diameters within a scope of plus or minus 20% account for 60-81% of the whole crystal grains. The method can be utilized for better solving the problems and used for allyl acetate industrial production.
Description
Technical field
The present invention relates to a kind of preparation method of vinyl acetate between to for plastic.
Background technology
Vinyl acetate between to for plastic is important industrial chemicals, is widely used in aspects such as manufacturing polyvinyl alcohol, vinyl copolymer resin, binding agent, coating, textile processing, paper coating.The main method of the world today producing vinyl acetate between to for plastic is with ethene, oxygen and acetic acid for raw material, makes catalyzer with palladium-Jin-Potassium ethanoate/silicon-dioxide, is synthesized by gas phase catalytic reaction.For obtaining the catalyzer of high space time yield, highly selective, forming in the active ingredient of catalyzer, constantly improving in preparation technology and even shape etc. always.
The patent (CN1226188A) of Hanchester rayon Co., Ltd provides a kind of and prepares the preparation method that load has the catalyzer of Primary Catalysts precious metal, promoter metal and basic metal or alkaline earth metal compound.Its concrete manufacturing processed is as follows: the mixed solution of the precious metal configured and promotor, in the steeping vat rotated, adds, passes into hot-air dry by (1); (2) solution getting the alkaline matters such as a certain amount of water glass makes an addition in dried catalyzer, and the palladium of the chlorination state of original water soluble and gold are changed into water insoluble hydroxide state palladium and gold; (3) in nitrogen atmosphere, reduce the palladium of hydroxide state and Au catalyst, be namely reduced into palladium and the Au catalyst of metallic state; (4) be washed till without chlorion, dry; (5) soak Potassium ethanoate, after drying, namely obtain described catalyzer.The space time yield of the catalyzer that the method obtains and selectivity are all lower.
Summary of the invention
Technical problem to be solved by this invention is the problem that the space time yield that exists in prior art and selectivity are low, provides a kind of preparation method of new vinyl acetate between to for plastic, and this preparation method has space time yield and the high feature of selectivity.
For solving the problems of the technologies described above, technical scheme of the present invention is as follows: a kind of preparation method of vinyl acetate between to for plastic, with the reaction raw materials of ethene, acetic acid, oxygen, water composition, under 130 ~ 200 DEG C of temperature of reaction and 0.5 ~ 0.9MPa reaction pressure, contact catalyst obtains the reaction product containing vinyl acetate between to for plastic, the mol ratio of various reaction raw materials is oxygen: ethene: nitrogen: acetic acid=1: 5 ~ 7: 4 ~ 8: 1 ~ 2, described catalyzer is with SiO
2, Al
2o
3or its mixture is carrier, load active component comprises palladium metal, metallic gold and alkali metal acetate, in catalyzer, the content of palladium is 1 ~ 12g/L, the content of gold is 0.1 ~ 9g/L, the content of alkali metal acetate is 10 ~ 90g/L, it is characterized in that the crystal grain median size of described porpezite is 4 ~ 9nm, the number of the crystal grain in median size ± 20% scope accounts for whole crystal grain 60 ~ 81%.
In technique scheme, the crystal grain median size of described porpezite is preferably 5 ~ 7nm; The number of the crystal grain in median size ± 20% scope preferably accounts for whole crystal grain 75 ~ 81%; Described alkali metal acetate is preferably Potassium ethanoate; Described temperature of reaction is preferably 140 ~ 160 DEG C; Described reaction pressure is preferably 0.6 ~ 0.8MPa.
Compared with prior art, catalyzer in the preparation method of vinyl acetate between to for plastic of the present invention have employed the method load active component of liquid carbon dioxide dipping, make the catalyzer prepared have the feature of even particle size distribution, thus space time yield and the selectivity of catalyzer can be improved.Experimental result shows, reaction pressure is 0.7MPa, temperature of reaction 140 DEG C, reaction raw materials mol ratio is oxygen: ethene: nitrogen: acetic acid=1: 6.8: 7.2: 1.7, the space time yield of catalyzer of the present invention brings up to 780 grams per liters hour by 640 grams per liters hour of prior art catalyzer, selectivity also improves 3.8%, achieves good technique effect.
Below by embodiment, the present invention is further elaborated.
Embodiment
[embodiment 1]
(1) catalyst preparing
Step (a): the liquid carbon dioxide solution 1200ml got containing hexafluoroacetylacetone palladium (II) and dimethyl (trifluoroacetylacetone) gold (III) is steeping fluid, the palladium content 2.75g/L of this steeping fluid, gold content 0.625g/L, under the dipping temperature of the impregnation pressure of 69MPa and 28 DEG C, flood 1100ml diameter is that the preparing spherical SiO 2 carrier of 4 ~ 6mm obtains catalyst precursor I;
Step (b): then reduce pressure, with the liquid carbon dioxide in the speed of 0.3ml (liquid carbon dioxide)/min evaporation catalyst precursor I, until liquid carbon dioxide evaporates, obtains catalyst precursor II;
Step (c): catalyst precursor II is reduced in hydrogen atmosphere, hydrogen flow rate is 0.2ml/min, and reduction temperature is 75 DEG C, obtains catalyst precursor III;
Step (d): infiltrate catalyst precursor III 5hr with the liquor kalii acetici 450ml that concentration is 0.1g/ml, then dry finished catalyst at 60 DEG C.
The main preparation condition of catalyzer lists in table 1.
(2) physical property characterizes
Use inductively coupled plasma spectrum generator (ICP) to measure porpezite metal content in finished catalyst, adopt electronic transmission Electronic Speculum (TEM) size of microcrystal to palladium measure and count.The physical property of catalyzer lists in table 2.
(3) catalyst performance evaluation
Use fixed-bed reactor evaluation, actual conditions is:
Catalyst loading volume: 700ml;
Reaction raw materials composition (with molar ratio computing): oxygen: ethene: nitrogen: acetic acid=1: 6.8: 7.2: 1.7;
Unstripped gas air speed: 2000hr
-1;
Reaction pressure: 0.7MPa;
Temperature of reaction: 140 DEG C;
Reaction times: 500hr.
With the content of component each in gc analysis reaction product, then calculate space time yield and the selectivity of catalyzer.
Table 3 lists the appreciation condition of catalyzer, space time yield and selective data.
[embodiment 2]
All identical with embodiment 1 except increasing other step except calcination steps between step (c) and step (d).Wherein calcination steps is: catalyst precursor III roasting under nitrogen/acetic acid atmosphere, and wherein acetic acid divides and covers 5% of total pressure, and maturing temperature is 250 DEG C, and roasting time is 24hr.Preparation condition for ease of more just catalyzer lists in table 1, and the physical data of catalyzer is listed in table 2, and the appreciation condition of catalyzer, space time yield and selective data list in table 3.
[embodiment 3 ~ 14]
Except changing the concentration of porpezite in liquid carbon dioxide steeping fluid, the kind of porpezite compound, the concentration of liquor kalii acetici, impregnation pressure, dipping temperature, reducing gas, reduction temperature, reaction raw materials mol ratio, unstripped gas air speed, reaction pressure and temperature of reaction, other operation steps is all identical with embodiment 2.Preparation condition for ease of more just catalyzer lists in table 1, and the physical data of catalyzer is listed in table 2, and the appreciation condition of catalyzer, space time yield and selective data list in table 3.
[comparative example 1]
Get containing H
2pdCl
4and HAuCl
4aqueous solution 1000ml be steeping fluid, wherein in solution, palladium content is 2.75g/L, and gold content is 0.625g/L, and dipping 1100ml diameter is that the preparing spherical SiO 2 carrier of 4 ~ 6mm obtains catalyst precursor; 27.5g sodium silicate nanahydrate being made into the 100ml aqueous solution is added in above-mentioned catalyst precursor, and shake to avoid caking, leaves standstill 24hr, then successively at 80 DEG C of dry 8hr for several times.
Infiltrate dried product with the hydrazine hydrate 30ml that concentration is 85wt% to reduce, the recovery time is 5hr, is then that the 450ml liquor kalii acetici of 0.1g/ml mixes with concentration, leaves standstill 5hr, dry finished catalyst at 60 DEG C.The method of evaluating performance of catalyzer physical property sign and catalyzer is with embodiment 2.Preparation condition for ease of more just catalyzer lists in table 1, and the physical data of catalyzer is listed in table 2, and the appreciation condition of catalyzer, space time yield and selective data list in table 3.
[comparative example 2]
Get containing H
2pdCl
4and HAuCl
4aqueous solution 1000ml be steeping fluid, wherein in solution, palladium content is 2.75g/L, and gold content is 0.625g/L, and dipping 1100ml diameter is that the preparing spherical SiO 2 carrier of 4 ~ 6mm obtains catalyst precursor; 27.5g sodium silicate nanahydrate being made into the 100ml aqueous solution is added in above-mentioned catalyst precursor, and shake to avoid caking, leaves standstill 24hr, then successively at 80 DEG C of dry 8hr for several times.Reduced in hydrogen atmosphere by dried product, hydrogen flow rate is 0.2ml/min, and reduction temperature is 75 DEG C, is down to room temperature, and the 450ml liquor kalii acetici being 0.1g/ml with concentration mixes, and leaves standstill 5hr, dry finished catalyst at 60 DEG C.The method of evaluating performance of catalyzer physical property sign and catalyzer is with embodiment 2.Preparation condition for ease of more just catalyzer lists in table 1, and the physical data of catalyzer is listed in table 2, and the appreciation condition of catalyzer, space time yield and selective data list in table 3.
Table 1 catalyst preparation conditions
Table 2 catalyzer physical data
Table 3 evaluating catalyst data
Claims (4)
1. a preparation method for vinyl acetate between to for plastic, with the reaction raw materials of ethene, acetic acid, oxygen, water composition, is 1600 ~ 3000hr in 130 ~ 200 DEG C of temperature of reaction, unstripped gas air speed
-1obtain the reaction product containing vinyl acetate between to for plastic with contact catalyst under 0.5 ~ 0.9MPa reaction pressure, the mol ratio of described reaction raw materials is Yang Qi ︰ Yi Xi ︰ Dan Qi ︰ acetic acid=1 ︰ 5 ~ 7 ︰ 4 ~ 8 ︰ 1 ~ 2, and described catalyzer is with SiO
2, Al
2o
3or its mixture is carrier, load active component comprises palladium metal, metallic gold and alkali metal acetate, in catalyzer, the content of palladium is 1 ~ 12g/L, the content of gold is 0.1 ~ 9g/L, the content of alkali metal acetate is 10 ~ 90g/L, it is characterized in that the crystal grain median size of described porpezite is 4 ~ 9nm, the number of the crystal grain in median size ± 20% scope accounts for whole crystal grain 75 ~ 81%; Described alkali metal acetate is Potassium ethanoate.
2. the preparation method of vinyl acetate between to for plastic according to claim 1, is characterized in that the crystal grain median size of the porpezite of described catalyzer is 5 ~ 7nm.
3. the preparation method of vinyl acetate between to for plastic according to claim 1, is characterized in that described temperature of reaction is 140 ~ 160 DEG C.
4. the preparation method of vinyl acetate between to for plastic according to claim 1, is characterized in that described reaction pressure is 0.6 ~ 0.8MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110369578.0A CN103121952B (en) | 2011-11-18 | 2011-11-18 | Vinyl acetate preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110369578.0A CN103121952B (en) | 2011-11-18 | 2011-11-18 | Vinyl acetate preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103121952A CN103121952A (en) | 2013-05-29 |
| CN103121952B true CN103121952B (en) | 2015-02-11 |
Family
ID=48453139
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110369578.0A Active CN103121952B (en) | 2011-11-18 | 2011-11-18 | Vinyl acetate preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103121952B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104437648B (en) * | 2013-09-24 | 2016-09-07 | 中国石油化工股份有限公司 | Vinyl acetate catalyst, preparation method and vinyl acetate synthesis method |
| CN106582824B (en) * | 2015-10-19 | 2019-07-09 | 中国石油化工股份有限公司 | Catalyst for synthesizing ethylene method vinyl acetate |
| CN106582826B (en) * | 2015-10-19 | 2019-11-08 | 中国石油化工股份有限公司 | Produce catalyst used in ethylene process vinyl acetate |
| CN106582872B (en) * | 2015-10-19 | 2019-09-06 | 中国石油化工股份有限公司 | Catalyst used in synthesizing ethylene method vinyl acetate |
| CN106582869B (en) * | 2015-10-19 | 2019-12-10 | 中国石油化工股份有限公司 | catalyst for preparing vinyl acetate by ethylene method |
| CN106582873B (en) * | 2015-10-19 | 2019-12-10 | 中国石油化工股份有限公司 | catalyst for producing vinyl acetate by ethylene method |
| CN106582866B (en) * | 2015-10-19 | 2019-08-06 | 中国石油化工股份有限公司 | Prepare catalyst used in ethylene process vinyl acetate |
| CN106582820B (en) * | 2015-10-19 | 2019-07-05 | 中国石油化工股份有限公司 | Catalyst used in ethylene process vinyl acetate synthesis |
| CN107282136A (en) * | 2016-04-12 | 2017-10-24 | 中国石油化工股份有限公司 | The preparation method and vinyl acetate synthesis method of vinyl acetate catalyst |
| CN116925582A (en) * | 2023-07-21 | 2023-10-24 | 广州珠江装修工程有限公司 | Environment-friendly indoor wall decoration method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1759089A (en) * | 2003-03-07 | 2006-04-12 | 昭和电工株式会社 | Processes for the production of alkenyl esters of lower carboxylic acids and process for the production of alkenyl alcohols |
| CN1759090A (en) * | 2003-03-07 | 2006-04-12 | 昭和电工株式会社 | Production processes of lower aliphatic carboxylic acid alkenyl esters and alkenyl alcohol obtained therewith |
| CN102218345A (en) * | 2010-04-15 | 2011-10-19 | 中国石油化工股份有限公司 | Catalyst for synthesizing vinylacetate and preparation method thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8263801B2 (en) * | 2009-09-30 | 2012-09-11 | Lyondell Chemical Technology, L.P. | Process for producing allyl acetate |
| US8067634B2 (en) * | 2009-10-30 | 2011-11-29 | Lyondell Chemical Technology, L.P. | Process for producing allyl acetate |
-
2011
- 2011-11-18 CN CN201110369578.0A patent/CN103121952B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1759089A (en) * | 2003-03-07 | 2006-04-12 | 昭和电工株式会社 | Processes for the production of alkenyl esters of lower carboxylic acids and process for the production of alkenyl alcohols |
| CN1759090A (en) * | 2003-03-07 | 2006-04-12 | 昭和电工株式会社 | Production processes of lower aliphatic carboxylic acid alkenyl esters and alkenyl alcohol obtained therewith |
| CN102218345A (en) * | 2010-04-15 | 2011-10-19 | 中国石油化工股份有限公司 | Catalyst for synthesizing vinylacetate and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103121952A (en) | 2013-05-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103121952B (en) | Vinyl acetate preparation method | |
| CN103120958B (en) | Vinyl acetate catalyst and preparation method thereof | |
| CN104437648B (en) | Vinyl acetate catalyst, preparation method and vinyl acetate synthesis method | |
| CN106423269B (en) | Unsaturated acetic acid ester catalyst and preparation method thereof | |
| CN102218345B (en) | Catalyst for synthesizing vinylacetate and preparation method thereof | |
| CN106423284B (en) | Vinyl acetate catalyst and preparation method thereof | |
| CN103878023B (en) | The preparation method of catalyzer for synthesizing vinyl acetate | |
| CN104226331A (en) | Selective hydrogenation copper catalyst with core-shell structure and preparation method thereof | |
| CN106881097B (en) | It is used to prepare the bismuth catalyst of copper containing carrier and preparation method thereof of 1,4- butynediols | |
| CN104226310A (en) | Selective hydrogenation catalyst with core-shell structure and preparation method thereof | |
| CN104437654A (en) | Vinyl acetate catalyst and preparation method thereof | |
| CN101767004A (en) | Preparation method of crude terephthalic acid hydrogenation catalyst | |
| CN103878022B (en) | The preparation method of acetic acid synthesized allyl ester catalyst | |
| CN106582855B (en) | Catalyst for preparing allyl acetate | |
| CN103120961B (en) | Propenyl ethanoate catalyst and preparation method thereof | |
| CN103121954B (en) | Method for preparing allyl acetate | |
| CN101172230A (en) | Method for producing catalyzer for synthesizing vinyl acetate | |
| CN103121955A (en) | Method for preparing allyl acetate | |
| EP2866932B1 (en) | Method and catalyst composite for production of vinyl acetate monomer | |
| CN102371182B (en) | Catalyst for synthesizing acetate propylene ester and preparation method thereof | |
| CN103347607A (en) | Catalyst and method for the production of chlorine by gas phase oxidation | |
| CN107866277B (en) | Preparation method of vinyl acetate catalyst | |
| CN100336593C (en) | Preparation method of supported catalyst for synthesizing vinyl acetate | |
| CN102463139B (en) | Catalyst for synthesizing isopropenyl acetate and preparation method thereof | |
| CN102372629A (en) | Method for synthesizing acetate propylene ester |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |