CN104558207A - Production process of hydroxypropyl methyl cellulose - Google Patents

Production process of hydroxypropyl methyl cellulose Download PDF

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Publication number
CN104558207A
CN104558207A CN201310500134.5A CN201310500134A CN104558207A CN 104558207 A CN104558207 A CN 104558207A CN 201310500134 A CN201310500134 A CN 201310500134A CN 104558207 A CN104558207 A CN 104558207A
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CN
China
Prior art keywords
production process
vltra tears
carry out
quaternization
carrying
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.)
Pending
Application number
CN201310500134.5A
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Chinese (zh)
Inventor
翟玉明
杨树人
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuqiao Shuangsheng Cellulose Co Ltd
Original Assignee
Wuqiao Shuangsheng Cellulose Co Ltd
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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Publication date
Application filed by Wuqiao Shuangsheng Cellulose Co Ltd filed Critical Wuqiao Shuangsheng Cellulose Co Ltd
Priority to CN201310500134.5A priority Critical patent/CN104558207A/en
Publication of CN104558207A publication Critical patent/CN104558207A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a production process of hydroxypropyl methyl cellulose. The production process comprises the following steps: (1) according to stated proportions and weights, putting a mixed solvent of toluene and isopropanol as well as alkali into a reaction kettle respectively, and stirring in a cold state so as to dissolve the alkali uniformly; (2) adding a preset amount of purified cotton, and carrying out stirring and heating for alkalization reaction; (3) after the alkalization reaction, storing alkalized cellulose molten slurry into the reaction kettle, carrying out vacuumizing, adding a stated amount of chloromethane and epoxypropane, and carrying stirring and heating for etherification reaction; (4) after the etherification reaction, pressing etherified molten slurry into a recycling kettle by using nitrogen, and adding a proportional amount of acetic acid for acid-base neutralization; (5) carrying out centrifugating, drying, crushing, bagging and the like to finish production of the hydroxypropyl methyl cellulose. The hydroxypropyl methyl cellulose produced by the production process has a significantly-increased viscosity index, and is stable in quality; by the production process, continuous production can be realized, the utilization ratio of equipment is enhanced, the yield is increased, and investment of alkalized cellulose crushing equipment is reduced.

Description

Vltra tears production technique
Technical field
The invention belongs to a kind of production method of Chemicals, particularly a kind of technique of producing for Vltra tears.
Background technology
In the prior art, produce Vltra tears to complete through processes such as alkalization, etherificate, neutralization, purifications.Beginning just to adopt gas-solid method technique, is a kind of batch production technique.Toluene, isopropyl alcohol mixed solvent squeezed into reactor, then the alkali of additional proportion weight (HONa), carry out coldly stirring, after the choline that heats up, add the purified cotton after pulverizing.Through stirring, intensification, time control program, carry out quaternization, reach the objects such as purified cotton is swelling, impurity elimination.Purified cotton after alkalization is called alkalinized celluloses.The non-alkali of Vltra tears, non-acid and neutral substance.Alkalinized celluloses must subduction containing base excess.After quaternization completes, undertaken pulverizing by pumping line to pulverizer, slaking, squeezing 5h, dispel remaining alkali.Then propylene oxide, methyl chloride are dropped into reactor, then add the alkalinized celluloses after squeezing by weight in proportion.Control to carry out etherification reaction through stirring, intensification, time course, thing finishes and carries out next procedure, and this is gas-solid method technique way.There is following defect in above-mentioned gas-solid method technique: one is alkalinized celluloses is sent in still pulverizer to squeeze, and makes it to expose in atmosphere, causes the viscosity index of the finished product to reduce.Two is after alkalinized celluloses goes out still, and the idle 5h of still, plant factor is low.Also increase the investment of alkalinized celluloses disintegrating apparatus simultaneously.Three is that batch process yields poorly, and is also unfavorable for safety in production simultaneously.
Summary of the invention
The object of the present invention, is to overcome the above-mentioned deficiency of prior art, and provide a kind of novel process of producing for Vltra tears, improve Vltra tears viscosity index, steady quality, plant factor improves, and saves facility investment.
For reaching above-mentioned object, the present invention takes following technical scheme, it is as follows that the present invention is used for the technique that Vltra tears produces: 1, to scale, the toluene of weight, isopropyl alcohol mixed solvent and alkali drops in reactor respectively, carries out cold stirring, makes it choline even; 2, add the purified cotton of pre-determined quantity, stir, heat up and carry out quaternization; 3, quaternization is finished, and is stored in reactor by the silt of alkalinized celluloses molten slurry, after vacuumizing, drops into methyl chloride and the propylene oxide of specified quantity, stirs, heat up and carry out etherification reaction; 4, etherification reaction terminates, and with nitrogen, still is reclaimed in molten for etherificate slurry press-in, and the acetic acid of additional proportion quantity, carry out acid-base neutralisation; 5, again through the operation such as centrifugal, oven dry, pulverizing, pack, the production of Vltra tears is completed.
The present invention takes technique scheme to have following beneficial effect: the Vltra tears viscosity index adopting present invention process to produce significantly improves, steady quality.Gas-solid method can only produce viscosity 100,000 and following Vltra tears.The present invention can not only produce viscosity 100,000 and following Vltra tears, and can also produce the Vltra tears of viscosity 150,000-20 ten thousand, and steady quality.The present invention can realize continuous seepage, and plant factor improves, and output increases, and saves the investment of alkalinized celluloses disintegrating apparatus.And practicable closed production, avoids the generation of the accidents such as alkali wound.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Embodiment 1
The technique of producing for Vltra tears is as follows: 1, to scale, the toluene of weight, isopropyl alcohol mixed solvent and alkali drops in reactor respectively, carries out cold stirring, makes it choline even; 2, add the 80-100 order purified cotton of pre-determined quantity, stir, be warming up to 56 DEG C and carry out quaternization 2h; 3, quaternization is finished, and is stored in reactor by the silt of alkalinized celluloses molten slurry, after vacuumizing, drops into methyl chloride and the propylene oxide of specified quantity, stirs, be warming up to 86 DEG C and carry out etherification reaction 2h; 4, etherification reaction terminates, and with nitrogen, still is reclaimed in molten for etherificate slurry press-in, and the acetic acid of additional proportion quantity, carry out acid-base neutralisation; 5, again through the operation such as centrifugal, oven dry, pulverizing, pack, the production of Vltra tears is completed.

Claims (3)

1. a Vltra tears production technique, is characterized in that it comprises the following steps: (1) to scale, the toluene of weight, isopropyl alcohol mixed solvent and alkali drops in reactor respectively, carries out cold stirring, make it choline even; (2) add the purified cotton of pre-determined quantity, stir, heat up and carry out quaternization; (3) quaternization is finished, and is stored in reactor by the silt of alkalinized celluloses molten slurry, after vacuumizing, drops into methyl chloride and the propylene oxide of specified quantity, stirs, heat up and carry out etherification reaction; (4) etherification reaction terminates, and with nitrogen, still is reclaimed in molten for etherificate slurry press-in, and the acetic acid of additional proportion quantity, carry out acid-base neutralisation; (5) again through the operation such as centrifugal, oven dry, pulverizing, pack, the production of Vltra tears is completed.
2. a kind of Vltra tears production technique according to claim 1, is characterized in that: the 80-100 order purified cotton adding pre-determined quantity, stirs, is warming up to 56 DEG C and carries out quaternization 2h.
3. a kind of Vltra tears production technique according to claim 1, is characterized in that: quaternization is finished, and is stored in reactor by the silt of alkalinized celluloses molten slurry, after vacuumizing, drop into methyl chloride and the propylene oxide of specified quantity, stir, be warming up to 86 DEG C and carry out etherification reaction 2h.
CN201310500134.5A 2013-10-13 2013-10-13 Production process of hydroxypropyl methyl cellulose Pending CN104558207A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310500134.5A CN104558207A (en) 2013-10-13 2013-10-13 Production process of hydroxypropyl methyl cellulose

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310500134.5A CN104558207A (en) 2013-10-13 2013-10-13 Production process of hydroxypropyl methyl cellulose

Publications (1)

Publication Number Publication Date
CN104558207A true CN104558207A (en) 2015-04-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310500134.5A Pending CN104558207A (en) 2013-10-13 2013-10-13 Production process of hydroxypropyl methyl cellulose

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CN (1) CN104558207A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107298969A (en) * 2016-04-14 2017-10-27 中国石油化工股份有限公司 A kind of oil base drilling fluid fluid loss additive and preparation method thereof
CN108285495A (en) * 2018-01-30 2018-07-17 河北双牛建材纤维素有限公司 The preparation method of hydroxypropyl methyl cellulose
CN109336984A (en) * 2018-09-18 2019-02-15 宁夏宸宇精细化学品有限责任公司 High viscosity hydroxypropyl methyl cellulose and preparation method thereof
CN109796946A (en) * 2017-11-17 2019-05-24 中石化石油工程技术服务有限公司 A kind of drilling fluid modified psyllium tackifier and preparation method thereof
CN109851681A (en) * 2018-12-19 2019-06-07 安徽山河药用辅料股份有限公司 A kind of preparation method of the dedicated hydroxypropyl methylcellulose of plant capsule
CN110294811A (en) * 2019-07-08 2019-10-01 淄博兰杜生物科技有限公司 A kind of hydroxypropyl methyl cellulose production technology

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
孙平等主编: "《食品添加剂应用手册(第1版)》", 31 January 2011 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107298969A (en) * 2016-04-14 2017-10-27 中国石油化工股份有限公司 A kind of oil base drilling fluid fluid loss additive and preparation method thereof
CN107298969B (en) * 2016-04-14 2020-08-21 中国石油化工股份有限公司 Filtrate reducer for oil-based drilling fluid and preparation method thereof
CN109796946A (en) * 2017-11-17 2019-05-24 中石化石油工程技术服务有限公司 A kind of drilling fluid modified psyllium tackifier and preparation method thereof
CN109796946B (en) * 2017-11-17 2021-10-22 中石化石油工程技术服务有限公司 Modified plantain seed hull tackifier for drilling fluid and preparation method thereof
CN108285495A (en) * 2018-01-30 2018-07-17 河北双牛建材纤维素有限公司 The preparation method of hydroxypropyl methyl cellulose
CN109336984A (en) * 2018-09-18 2019-02-15 宁夏宸宇精细化学品有限责任公司 High viscosity hydroxypropyl methyl cellulose and preparation method thereof
CN109851681A (en) * 2018-12-19 2019-06-07 安徽山河药用辅料股份有限公司 A kind of preparation method of the dedicated hydroxypropyl methylcellulose of plant capsule
CN110294811A (en) * 2019-07-08 2019-10-01 淄博兰杜生物科技有限公司 A kind of hydroxypropyl methyl cellulose production technology

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hydroxy methyl propyl cellulose