 Integral transform method |
| What is claimed is: 1. A method of performing an integral transform operation, comprising the steps ... |
|
| Status predictor for combined shifter-rotate/merge unit |
| Our invention deals with the generation of status for a combined shift-rotate/merge unit. G... |
|
| Absolute difference processor element processing unit, and processor |
| An object of the present invention is accordingly to enable a single processor element to compute ... |
|
| Decimation filter |
| This is achieved with the decimation filter set forth in the preamble, which in accordance with the ... |
|
| Neighbor image processing device |
| According to the present invention, the neighbor image processing device for processing image data ... |
|
| Print control system in a color image printer |
| Accordingly, an object of the present invention is to provide a color image printer which ... |
|
| Computer graphics display processor for generating dynamic refreshed vector images |
| The present invention provides a low cost vector graphics display processor capable of being driven ... |
|
| Clock receiver for network synchronization control of exchange system |
| Therefore, it is an object of the present invention to provide an improved network synchronization ... |
|
| Multi-process emulator suitable for testing software under multi-process environments |
| An object of this invention is to provide an emulator working efficiently under a multi-process ... |
|
| Method and system for providing event-response capabilities to pseudocode |
| The present invention includes a method and system for providing event-response and monitoring ... |
|
|
Method for recovering uncrosslinked synthetic resin waste
| Details |
Inventors: Takayanagi, Yasuyuki; Endoh, Satoshi; Sugama, Naoki; Sugita, Masaru;
Assignee: Nitto Chemical Industry Co., Ltd. (Tokyo, JP)
Primary Examiner: Spear; Frank
Assistant Examiner:
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak & Seas
A method for recovering an uncrosslinked synthetic resin waste including dissolving the uncrosslinked synthetic resin waste in a solvent containing, as an active ingredient, one or more oxyisobutyric acid esters selected from an alkyl .alpha.-alkoxyisobutyrate, an alkyl .beta.-alkoxyisobutyrate and an alkyl .alpha.-hydroxyisobutyrate. This invention provides a method for recovering a plastic waste by using a highly safe solvent which is free from the problems encountered in the conventional methods with the use of aromatic hydrocarbons or halogenated hydrocarbons, and comprises non-halogen solvents, forms no substance causing environmental problems, has a high ability to dissolve plastic wastes, has neither toxicity nor any offensive odor, is not accumulated in nature because of its high biodegradability, and has a relatively high boiling point. |
|
DETAILED DESCRIPTION OF THE INVENTION It is an important point that the solvent used in the method for recovering an uncrosslinked synthetic resin waste of the present invention contains an alkyl oxyisobutyrate.
Examples of the oxyisobutyric acid ester include alkyl .
alpha.
-alkoxyisobutyrates (corresponding to formula (1)), such as methyl .
alpha.
-methoxyisobutyrate, ethyl .
alpha.
-methoxyisobutyrate, methyl .
alpha.
-ethoxyisobutyrate and ethyl .
alpha.
-ethoxyisobutyrate; alkyl .
beta.
-alkoxyisobutyrates (corresponding to formula (2)), such as methyl .
beta.
-methoxyisobutyrate, ethyl .
beta.
-methoxyisobutyrate, methyl .
beta.
-ethoxyisobutyrate and ethyl .
beta.
-ethoxyisobutyrate; and alkyl .
alpha.
-hydroxyisobutyrates (corresponding to formula (3)), such as methyl .
alpha.
-hydroxyisobutyrate and ethyl .
alpha.
-hydroxyisobutyrate.
Taking dissolving power and volatility into consideration, it is particularly preferable to use methyl .
alpha.
-methoxyisobutyrate, methyl .
beta.
-methoxyisobutyrate, methyl .
beta.
-ethoxyisobutyrate or methyl .
alpha.
-hydroxyisobutyrate.
Moreover, these oxyisobutyrates are excellent in safety.
In particular, methyl .
beta.
-methoxyisobutyrate and methyl .
alpha.
-hydroxyisobutyrate are highly safe compounds, each having an acute toxicity LD.
sub.
50 of not less than 5,000 mg/kg (in the case of oral administration to rat).
The alkyl .
alpha.
-alkoxyisobutyrates (corresponding to formula (1)), alkyl .
beta.
-alkoxyisobutyrates (corresponding to formula (2)) and alkyl .
alpha.
-hydroxyisobutyrates (corresponding to formula (3)) may be used either individually or in combination of two or more thereof.
The mixing ratio thereof may be arbitrarily selected.
These oxyisobutyric acid esters represented by formulae (1), (2) and (3) are available as disclosed, for example, in EP-A-429800.
The alkyl .
alpha.
-alkoxyisobutyrates, alkyl .
beta.
-alkoxyisobutyrates and alkyl .
alpha.
-hydroxyisobutyrates used in the present invention are highly compatible with other general organic solvents, for example, alcohols, esters, ketones, amides and aromatic hydrocarbons
|
| Related patents |
|
|
Alternative solvents for a method of reclaiming styrene and other products from polystyrene based materials
OF A PREFERRED EMBODIMENT The inventors have discovered that d-limonene, or with 1limonene, in its racemic form, dipentene, are especially suitable alternative solvents ...
|
|
|
Method and apparatus for recycling styrene resin
Meanwhile, in the above recycling system, there are left in the solution obtained on dissolving expanded styrene or styrene cabinets insoluble impurities less than ...
|
|
|
Method of increasing the yield of plants having storage organs by treatment with thiadiazolylimidazolines
I Claim: 1. A method of increasing the yield of plant food contained in plant storage organs which comprises contacting the plants having storage organs with from about 0...
|
|
|
Sewage treatment and recycling system
It is therefore a primary object of the invention to provide a sewage treatment system for residential or commercial application wherein the treated effluent can safely ...
|
|
|
Apparatus for treatment of waste water
An apparatus is provided for treatment of waste water containing organic contaminants. In particular, preferably both the oxygen demand of the waste water is reduced and ...
|
|
|
Waste water drainage and recovery system
By the system of the present invention, the need is eliminated for a central gravity sewer or forced sewer collection system. Further, the system greatly reduces the ...
|
|
|
Hybrid biological nutrient removal system
The invention provides a hybrid system comprising a single-sludge reactor, clarifier unit, and an aquaculture pond, together useful for accomplishing the process ...
|
|
|
Biomass impoundment management system for purifying water
OF THE INVENTION 1. Overview In FIG. 1, a conventional impoundment 10 such as a pond has a bottom 20 and sides 30. The impoundment 10 contains water 40. A first type of ...
|
|
|
Phosphonomethylated polyvinylamines and preparation and use thereof
We claim: 1. In a water-carrying system subject to the formation of scale, the improvement comprising the water in said water-carrying system comprises from 0.1-100 ppm ...
|
|
|
Test management system to acquire, process and display test data
The present invention is a test management system for acquiring, processing and displaying test data, the test management system including a data acquisition system ...
|
|
|
CPUs 
